lustre/obdclass/obd_config.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/obdclass/obd_config.c
  37  *
  38  * Config API
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_CLASS
  42 #ifdef __KERNEL__
  43 #include <obd_class.h>
  44 #include <linux/string.h>
  45 #else
  46 #include <liblustre.h>
  47 #include <obd_class.h>
  48 #include <obd.h>
  49 #endif
  50 #include <lustre_log.h>
  51 #include <lprocfs_status.h>
  52 #include <libcfs/list.h>
  53 #include <lustre_param.h>
  54 #include <class_hash.h>
  55
  56 static lustre_hash_ops_t uuid_hash_ops;
  57 static lustre_hash_ops_t nid_hash_ops;
  58 static lustre_hash_ops_t nid_stat_hash_ops;
  59
  60 /*********** string parsing utils *********/
  61
  62 /* returns 0 if we find this key in the buffer, else 1 */
  63 int class_find_param(char *buf, char *key, char **valp)
  64 {
  65         char *ptr;
  66
  67         if (!buf)
  68                 return 1;
  69
  70         if ((ptr = strstr(buf, key)) == NULL)
  71                 return 1;
  72
  73         if (valp)
  74                 *valp = ptr + strlen(key);
  75
  76         return 0;
  77 }
  78
  79 /* returns 0 if this is the first key in the buffer, else 1.
  80    valp points to first char after key. */
  81 int class_match_param(char *buf, char *key, char **valp)
  82 {
  83         if (!buf)
  84                 return 1;
  85
  86         if (memcmp(buf, key, strlen(key)) != 0)
  87                 return 1;
  88
  89         if (valp)
  90                 *valp = buf + strlen(key);
  91
  92         return 0;
  93 }
  94
  95 /* 0 is good nid,
  96    1 not found
  97    < 0 error
  98    endh is set to next separator */
  99 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
 100 {
 101         char tmp, *endp;
 102
 103         if (!buf)
 104                 return 1;
 105         while (*buf == ',' || *buf == ':')
 106                 buf++;
 107         if (*buf == ' ' || *buf == '/' || *buf == '\0')
 108                 return 1;
 109
 110         /* nid separators or end of nids */
 111         endp = strpbrk(buf, ",: /");
 112         if (endp == NULL)
 113                 endp = buf + strlen(buf);
 114
 115         tmp = *endp;
 116         *endp = '\0';
 117         *nid = libcfs_str2nid(buf);
 118         if (*nid == LNET_NID_ANY) {
 119                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
 120                 *endp = tmp;
 121                 return -EINVAL;
 122         }
 123         *endp = tmp;
 124
 125         if (endh)
 126                 *endh = endp;
 127         CDEBUG(D_INFO, "Nid %s\n", libcfs_nid2str(*nid));
 128         return 0;
 129 }
 130
 131 EXPORT_SYMBOL(class_find_param);
 132 EXPORT_SYMBOL(class_match_param);
 133 EXPORT_SYMBOL(class_parse_nid);
 134
 135 /********************** class fns **********************/
 136
 137 /**
 138  * Create a new device and set the type, name and uuid.  If successful, the new
 139  * device can be accessed by either name or uuid.
 140  */
 141 int class_attach(struct lustre_cfg *lcfg)
 142 {
 143         struct obd_device *obd = NULL;
 144         char *typename, *name, *uuid;
 145         int rc, len;
 146         ENTRY;
 147
 148         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 149                 CERROR("No type passed!\n");
 150                 RETURN(-EINVAL);
 151         }
 152         typename = lustre_cfg_string(lcfg, 1);
 153
 154         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
 155                 CERROR("No name passed!\n");
 156                 RETURN(-EINVAL);
 157         }
 158         name = lustre_cfg_string(lcfg, 0);
 159
 160         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
 161                 CERROR("No UUID passed!\n");
 162                 RETURN(-EINVAL);
 163         }
 164         uuid = lustre_cfg_string(lcfg, 2);
 165
 166         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 167                MKSTR(typename), MKSTR(name), MKSTR(uuid));
 168
 169         obd = class_newdev(typename, name);
 170         if (IS_ERR(obd)) {
 171                 /* Already exists or out of obds */
 172                 rc = PTR_ERR(obd);
 173                 obd = NULL;
 174                 CERROR("Cannot create device %s of type %s : %d\n",
 175                        name, typename, rc);
 176                 GOTO(out, rc);
 177         }
 178         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
 179                  name, typename);
 180         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 181                  "obd %p obd_magic %08X != %08X\n",
 182                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 183         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0, "%p obd_name %s != %s\n",
 184                  obd, obd->obd_name, name);
 185
 186         rwlock_init(&obd->obd_pool_lock);
 187         obd->obd_pool_limit = 0;
 188         obd->obd_pool_slv = 0;
 189
 190         CFS_INIT_LIST_HEAD(&obd->obd_exports);
 191         CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
 192         CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
 193         spin_lock_init(&obd->obd_nid_lock);
 194         spin_lock_init(&obd->obd_dev_lock);
 195         sema_init(&obd->obd_dev_sem, 1);
 196         spin_lock_init(&obd->obd_osfs_lock);
 197         /* obd->obd_osfs_age must be set to a value in the distant
 198          * past to guarantee a fresh statfs is fetched on mount. */
 199         obd->obd_osfs_age = cfs_time_shift_64(-1000);
 200
 201         /* XXX belongs in setup not attach  */
 202         /* recovery data */
 203         cfs_init_timer(&obd->obd_recovery_timer);
 204         spin_lock_init(&obd->obd_processing_task_lock);
 205         cfs_waitq_init(&obd->obd_next_transno_waitq);
 206         cfs_waitq_init(&obd->obd_evict_inprogress_waitq);
 207         CFS_INIT_LIST_HEAD(&obd->obd_req_replay_queue);
 208         CFS_INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
 209         CFS_INIT_LIST_HEAD(&obd->obd_final_req_queue);
 210
 211         llog_group_init(&obd->obd_olg, FILTER_GROUP_LLOG);
 212
 213         spin_lock_init(&obd->obd_uncommitted_replies_lock);
 214         CFS_INIT_LIST_HEAD(&obd->obd_uncommitted_replies);
 215
 216         len = strlen(uuid);
 217         if (len >= sizeof(obd->obd_uuid)) {
 218                 CERROR("uuid must be < %d bytes long\n",
 219                        (int)sizeof(obd->obd_uuid));
 220                 GOTO(out, rc = -EINVAL);
 221         }
 222         memcpy(obd->obd_uuid.uuid, uuid, len);
 223
 224         /* do the attach */
 225         if (OBP(obd, attach)) {
 226                 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
 227                 if (rc)
 228                         GOTO(out, rc = -EINVAL);
 229         }
 230
 231         /* Detach drops this */
 232         spin_lock(&obd->obd_dev_lock);
 233         atomic_set(&obd->obd_refcount, 1);
 234         spin_unlock(&obd->obd_dev_lock);
 235
 236         obd->obd_attached = 1;
 237         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 238                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 239         RETURN(0);
 240  out:
 241         if (obd != NULL) {
 242                 class_release_dev(obd);
 243         }
 244         return rc;
 245 }
 246
 247 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 248 {
 249         int err = 0;
 250         struct obd_export *exp;
 251         ENTRY;
 252
 253         LASSERT(obd != NULL);
 254         LASSERTF(obd == class_num2obd(obd->obd_minor),
 255                  "obd %p != obd_devs[%d] %p\n",
 256                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 257         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 258                  "obd %p obd_magic %08x != %08x\n",
 259                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 260
 261         /* have we attached a type to this device? */
 262         if (!obd->obd_attached) {
 263                 CERROR("Device %d not attached\n", obd->obd_minor);
 264                 RETURN(-ENODEV);
 265         }
 266
 267         if (obd->obd_set_up) {
 268                 CERROR("Device %d already setup (type %s)\n",
 269                        obd->obd_minor, obd->obd_type->typ_name);
 270                 RETURN(-EEXIST);
 271         }
 272
 273         /* is someone else setting us up right now? (attach inits spinlock) */
 274         spin_lock(&obd->obd_dev_lock);
 275         if (obd->obd_starting) {
 276                 spin_unlock(&obd->obd_dev_lock);
 277                 CERROR("Device %d setup in progress (type %s)\n",
 278                        obd->obd_minor, obd->obd_type->typ_name);
 279                 RETURN(-EEXIST);
 280         }
 281         /* just leave this on forever.  I can't use obd_set_up here because
 282            other fns check that status, and we're not actually set up yet. */
 283         obd->obd_starting = 1;
 284         obd->obd_uuid_hash = NULL;
 285         obd->obd_nid_hash = NULL;
 286         obd->obd_nid_stats_hash = NULL;
 287         spin_unlock(&obd->obd_dev_lock);
 288
 289         /* create an uuid-export lustre hash */
 290         obd->obd_uuid_hash = lustre_hash_init("UUID_HASH", 128, 128,
 291                                               &uuid_hash_ops, 0);
 292         if (!obd->obd_uuid_hash)
 293                 GOTO(err_hash, -ENOMEM);
 294
 295         /* create a nid-export lustre hash */
 296         obd->obd_nid_hash = lustre_hash_init("NID_HASH", 128, 128,
 297                                              &nid_hash_ops, 0);
 298         if (!obd->obd_nid_hash)
 299                 GOTO(err_hash, -ENOMEM);
 300
 301         /* create a nid-stats lustre hash */
 302         obd->obd_nid_stats_hash = lustre_hash_init("NID_STATS", 128, 128,
 303                                                    &nid_stat_hash_ops, 0);
 304         if (!obd->obd_nid_stats_hash)
 305                 GOTO(err_hash, -ENOMEM);
 306
 307         exp = class_new_export(obd, &obd->obd_uuid);
 308         if (IS_ERR(exp))
 309                 RETURN(PTR_ERR(exp));
 310
 311         obd->obd_self_export = exp;
 312         list_del_init(&exp->exp_obd_chain_timed);
 313         class_export_put(exp);
 314
 315         err = obd_setup(obd, lcfg);
 316         if (err)
 317                 GOTO(err_exp, err);
 318
 319         obd->obd_set_up = 1;
 320
 321         spin_lock(&obd->obd_dev_lock);
 322         /* cleanup drops this */
 323         class_incref(obd);
 324         spin_unlock(&obd->obd_dev_lock);
 325
 326         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 327                obd->obd_name, obd->obd_uuid.uuid);
 328
 329         RETURN(0);
 330
 331 err_exp:
 332         class_unlink_export(obd->obd_self_export);
 333         obd->obd_self_export = NULL;
 334 err_hash:
 335         lustre_hash_exit(obd->obd_uuid_hash);
 336         lustre_hash_exit(obd->obd_nid_hash);
 337         lustre_hash_exit(obd->obd_nid_stats_hash);
 338         obd->obd_starting = 0;
 339         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 340         RETURN(err);
 341 }
 342
 343 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 344 {
 345         ENTRY;
 346
 347         if (obd->obd_set_up) {
 348                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 349                 RETURN(-EBUSY);
 350         }
 351
 352         spin_lock(&obd->obd_dev_lock);
 353         if (!obd->obd_attached) {
 354                 spin_unlock(&obd->obd_dev_lock);
 355                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 356                 RETURN(-ENODEV);
 357         }
 358         obd->obd_attached = 0;
 359         spin_unlock(&obd->obd_dev_lock);
 360
 361         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 362                obd->obd_name, obd->obd_uuid.uuid);
 363
 364         class_decref(obd);
 365
 366         /* not strictly necessary, but cleans up eagerly */
 367         obd_zombie_impexp_cull();
 368
 369         RETURN(0);
 370 }
 371
 372 static void dump_exports(struct obd_device *obd)
 373 {
 374         struct obd_export *exp, *n;
 375
 376         list_for_each_entry_safe(exp, n, &obd->obd_exports, exp_obd_chain) {
 377                 struct ptlrpc_reply_state *rs;
 378                 struct ptlrpc_reply_state *first_reply = NULL;
 379                 int                        nreplies = 0;
 380
 381                 list_for_each_entry (rs, &exp->exp_outstanding_replies,
 382                                      rs_exp_list) {
 383                         if (nreplies == 0)
 384                                 first_reply = rs;
 385                         nreplies++;
 386                 }
 387
 388                 CDEBUG(D_IOCTL, "%s: %p %s %s %d %d %d: %p %s\n",
 389                        obd->obd_name, exp, exp->exp_client_uuid.uuid,
 390                        obd_export_nid2str(exp),
 391                        atomic_read(&exp->exp_refcount),
 392                        exp->exp_failed, nreplies, first_reply,
 393                        nreplies > 3 ? "..." : "");
 394         }
 395 }
 396
 397 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 398 {
 399         int err = 0;
 400         char *flag;
 401         ENTRY;
 402
 403         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 404
 405         if (!obd->obd_set_up) {
 406                 CERROR("Device %d not setup\n", obd->obd_minor);
 407                 RETURN(-ENODEV);
 408         }
 409
 410         spin_lock(&obd->obd_dev_lock);
 411         if (obd->obd_stopping) {
 412                 spin_unlock(&obd->obd_dev_lock);
 413                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 414                 RETURN(-ENODEV);
 415         }
 416         /* Leave this on forever */
 417         obd->obd_stopping = 1;
 418         spin_unlock(&obd->obd_dev_lock);
 419
 420         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 421                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 422                         switch (*flag) {
 423                         case 'F':
 424                                 obd->obd_force = 1;
 425                                 break;
 426                         case 'A':
 427                                 LCONSOLE_WARN("Failing over %s\n",
 428                                               obd->obd_name);
 429                                 obd->obd_fail = 1;
 430                                 obd->obd_no_transno = 1;
 431                                 obd->obd_no_recov = 1;
 432                                 /* Set the obd readonly if we can */
 433                                 if (OBP(obd, iocontrol))
 434                                         obd_iocontrol(OBD_IOC_SET_READONLY,
 435                                                       obd->obd_self_export,
 436                                                       0, NULL, NULL);
 437                                 break;
 438                         default:
 439                                 CERROR("unrecognised flag '%c'\n",
 440                                        *flag);
 441                         }
 442         }
 443
 444         /* The three references that should be remaining are the
 445          * obd_self_export and the attach and setup references. */
 446         if (atomic_read(&obd->obd_refcount) > 3) {
 447 #if 0           /* We should never fail to cleanup with mountconf */
 448                 if (!(obd->obd_fail || obd->obd_force)) {
 449                         CERROR("OBD %s is still busy with %d references\n"
 450                                "You should stop active file system users,"
 451                                " or use the --force option to cleanup.\n",
 452                                obd->obd_name, atomic_read(&obd->obd_refcount));
 453                         dump_exports(obd);
 454                         /* Allow a failed cleanup to try again. */
 455                         obd->obd_stopping = 0;
 456                 }
 457 #endif
 458                 /* refcounf - 3 might be the number of real exports
 459                    (excluding self export). But class_incref is called
 460                    by other things as well, so don't count on it. */
 461                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 462                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 463                 dump_exports(obd);
 464                 class_disconnect_exports(obd);
 465         }
 466         LASSERT(obd->obd_self_export);
 467
 468         /* destroy an uuid-export hash body */
 469         lustre_hash_exit(obd->obd_uuid_hash);
 470
 471         /* destroy a nid-export hash body */
 472         lustre_hash_exit(obd->obd_nid_hash);
 473
 474         /* destroy a nid-stats hash body */
 475         lustre_hash_exit(obd->obd_nid_stats_hash);
 476
 477         /* Precleanup, we must make sure all exports get destroyed. */
 478         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 479         if (err)
 480                 CERROR("Precleanup %s returned %d\n",
 481                        obd->obd_name, err);
 482         class_decref(obd);
 483         obd->obd_set_up = 0;
 484         RETURN(0);
 485 }
 486
 487 struct obd_device *class_incref(struct obd_device *obd)
 488 {
 489         atomic_inc(&obd->obd_refcount);
 490         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 491                atomic_read(&obd->obd_refcount));
 492
 493         return obd;
 494 }
 495
 496 void class_decref(struct obd_device *obd)
 497 {
 498         int err;
 499         int refs;
 500
 501         spin_lock(&obd->obd_dev_lock);
 502         atomic_dec(&obd->obd_refcount);
 503         refs = atomic_read(&obd->obd_refcount);
 504         spin_unlock(&obd->obd_dev_lock);
 505
 506         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 507
 508         if ((refs == 1) && obd->obd_stopping) {
 509                 /* All exports have been destroyed; there should
 510                    be no more in-progress ops by this point.*/
 511
 512                 spin_lock(&obd->obd_self_export->exp_lock);
 513                 obd->obd_self_export->exp_flags |=
 514                         (obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 515                         (obd->obd_force ? OBD_OPT_FORCE : 0);
 516                 spin_unlock(&obd->obd_self_export->exp_lock);
 517
 518                 /* note that we'll recurse into class_decref again */
 519                 class_unlink_export(obd->obd_self_export);
 520                 return;
 521         }
 522
 523         if (refs == 0) {
 524                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 525                        obd->obd_name, obd->obd_uuid.uuid);
 526                 LASSERT(!obd->obd_attached);
 527                 if (obd->obd_stopping) {
 528                         /* If we're not stopping, we were never set up */
 529                         err = obd_cleanup(obd);
 530                         if (err)
 531                                 CERROR("Cleanup %s returned %d\n",
 532                                        obd->obd_name, err);
 533                 }
 534                 if (OBP(obd, detach)) {
 535                         err = OBP(obd,detach)(obd);
 536                         if (err)
 537                                 CERROR("Detach returned %d\n", err);
 538                 }
 539                 class_release_dev(obd);
 540         }
 541 }
 542
 543 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 544 {
 545         struct obd_import *imp;
 546         struct obd_uuid uuid;
 547         int rc;
 548         ENTRY;
 549
 550         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 551             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 552                 CERROR("invalid conn_uuid\n");
 553                 RETURN(-EINVAL);
 554         }
 555         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 556             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 557             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 558                 CERROR("can't add connection on non-client dev\n");
 559                 RETURN(-EINVAL);
 560         }
 561
 562         imp = obd->u.cli.cl_import;
 563         if (!imp) {
 564                 CERROR("try to add conn on immature client dev\n");
 565                 RETURN(-EINVAL);
 566         }
 567
 568         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 569         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 570
 571         RETURN(rc);
 572 }
 573
 574 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 575 {
 576         struct obd_import *imp;
 577         struct obd_uuid uuid;
 578         int rc;
 579         ENTRY;
 580
 581         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 582             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 583                 CERROR("invalid conn_uuid\n");
 584                 RETURN(-EINVAL);
 585         }
 586         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 587             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 588                 CERROR("can't del connection on non-client dev\n");
 589                 RETURN(-EINVAL);
 590         }
 591
 592         imp = obd->u.cli.cl_import;
 593         if (!imp) {
 594                 CERROR("try to del conn on immature client dev\n");
 595                 RETURN(-EINVAL);
 596         }
 597
 598         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 599         rc = obd_del_conn(imp, &uuid);
 600
 601         RETURN(rc);
 602 }
 603
 604 CFS_LIST_HEAD(lustre_profile_list);
 605
 606 struct lustre_profile *class_get_profile(const char * prof)
 607 {
 608         struct lustre_profile *lprof;
 609
 610         ENTRY;
 611         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 612                 if (!strcmp(lprof->lp_profile, prof)) {
 613                         RETURN(lprof);
 614                 }
 615         }
 616         RETURN(NULL);
 617 }
 618
 619 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 620                       int mdclen, char *mdc)
 621 {
 622         struct lustre_profile *lprof;
 623         int err = 0;
 624         ENTRY;
 625
 626         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 627
 628         OBD_ALLOC(lprof, sizeof(*lprof));
 629         if (lprof == NULL)
 630                 RETURN(-ENOMEM);
 631         CFS_INIT_LIST_HEAD(&lprof->lp_list);
 632
 633         LASSERT(proflen == (strlen(prof) + 1));
 634         OBD_ALLOC(lprof->lp_profile, proflen);
 635         if (lprof->lp_profile == NULL)
 636                 GOTO(out, err = -ENOMEM);
 637         memcpy(lprof->lp_profile, prof, proflen);
 638
 639         LASSERT(osclen == (strlen(osc) + 1));
 640         OBD_ALLOC(lprof->lp_dt, osclen);
 641         if (lprof->lp_dt == NULL)
 642                 GOTO(out, err = -ENOMEM);
 643         memcpy(lprof->lp_dt, osc, osclen);
 644
 645         if (mdclen > 0) {
 646                 LASSERT(mdclen == (strlen(mdc) + 1));
 647                 OBD_ALLOC(lprof->lp_md, mdclen);
 648                 if (lprof->lp_md == NULL)
 649                         GOTO(out, err = -ENOMEM);
 650                 memcpy(lprof->lp_md, mdc, mdclen);
 651         }
 652
 653         list_add(&lprof->lp_list, &lustre_profile_list);
 654         RETURN(err);
 655
 656 out:
 657         if (lprof->lp_md)
 658                 OBD_FREE(lprof->lp_md, mdclen);
 659         if (lprof->lp_dt)
 660                 OBD_FREE(lprof->lp_dt, osclen);
 661         if (lprof->lp_profile)
 662                 OBD_FREE(lprof->lp_profile, proflen);
 663         OBD_FREE(lprof, sizeof(*lprof));
 664         RETURN(err);
 665 }
 666
 667 void class_del_profile(const char *prof)
 668 {
 669         struct lustre_profile *lprof;
 670         ENTRY;
 671
 672         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 673
 674         lprof = class_get_profile(prof);
 675         if (lprof) {
 676                 list_del(&lprof->lp_list);
 677                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 678                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 679                 if (lprof->lp_md)
 680                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 681                 OBD_FREE(lprof, sizeof *lprof);
 682         }
 683         EXIT;
 684 }
 685
 686 /* COMPAT_146 */
 687 void class_del_profiles(void)
 688 {
 689         struct lustre_profile *lprof, *n;
 690         ENTRY;
 691
 692         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 693                 list_del(&lprof->lp_list);
 694                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 695                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 696                 if (lprof->lp_md)
 697                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 698                 OBD_FREE(lprof, sizeof *lprof);
 699         }
 700         EXIT;
 701 }
 702
 703 /* We can't call ll_process_config directly because it lives in a module that
 704    must be loaded after this one. */
 705 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
 706
 707 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 708 {
 709         client_process_config = cpc;
 710 }
 711 EXPORT_SYMBOL(lustre_register_client_process_config);
 712
 713 int class_process_config(struct lustre_cfg *lcfg)
 714 {
 715         struct obd_device *obd;
 716         int err;
 717
 718         LASSERT(lcfg && !IS_ERR(lcfg));
 719         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
 720
 721         /* Commands that don't need a device */
 722         switch(lcfg->lcfg_command) {
 723         case LCFG_ATTACH: {
 724                 err = class_attach(lcfg);
 725                 GOTO(out, err);
 726         }
 727         case LCFG_ADD_UUID: {
 728                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
 729                        " (%s)\n", lustre_cfg_string(lcfg, 1),
 730                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
 731
 732                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
 733                 GOTO(out, err);
 734         }
 735         case LCFG_DEL_UUID: {
 736                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
 737                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
 738                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
 739
 740                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
 741                 GOTO(out, err);
 742         }
 743         case LCFG_MOUNTOPT: {
 744                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
 745                        lustre_cfg_string(lcfg, 1),
 746                        lustre_cfg_string(lcfg, 2),
 747                        lustre_cfg_string(lcfg, 3));
 748                 /* set these mount options somewhere, so ll_fill_super
 749                  * can find them. */
 750                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
 751                                         lustre_cfg_string(lcfg, 1),
 752                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
 753                                         lustre_cfg_string(lcfg, 2),
 754                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
 755                                         lustre_cfg_string(lcfg, 3));
 756                 GOTO(out, err);
 757         }
 758         case LCFG_DEL_MOUNTOPT: {
 759                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
 760                        lustre_cfg_string(lcfg, 1));
 761                 class_del_profile(lustre_cfg_string(lcfg, 1));
 762                 GOTO(out, err = 0);
 763         }
 764         case LCFG_SET_TIMEOUT: {
 765                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
 766                        obd_timeout, lcfg->lcfg_num);
 767                 obd_timeout = max(lcfg->lcfg_num, 1U);
 768                 GOTO(out, err = 0);
 769         }
 770         case LCFG_SET_UPCALL: {
 771                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
 772                 /* COMPAT_146 Don't fail on old configs */
 773                 GOTO(out, err = 0);
 774         }
 775         case LCFG_MARKER: {
 776                 struct cfg_marker *marker;
 777                 marker = lustre_cfg_buf(lcfg, 1);
 778                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
 779                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
 780                 GOTO(out, err = 0);
 781         }
 782         case LCFG_PARAM: {
 783                 /* llite has no obd */
 784                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
 785                                        PARAM_LLITE, 0) == 0) &&
 786                     client_process_config) {
 787                         err = (*client_process_config)(lcfg);
 788                         GOTO(out, err);
 789                 }
 790                 /* Fall through */
 791                 break;
 792         }
 793         }
 794
 795         /* Commands that require a device */
 796         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
 797         if (obd == NULL) {
 798                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
 799                         CERROR("this lcfg command requires a device name\n");
 800                 else
 801                         CERROR("no device for: %s\n",
 802                                lustre_cfg_string(lcfg, 0));
 803
 804                 GOTO(out, err = -EINVAL);
 805         }
 806
 807         switch(lcfg->lcfg_command) {
 808         case LCFG_SETUP: {
 809                 err = class_setup(obd, lcfg);
 810                 GOTO(out, err);
 811         }
 812         case LCFG_DETACH: {
 813                 err = class_detach(obd, lcfg);
 814                 GOTO(out, err = 0);
 815         }
 816         case LCFG_CLEANUP: {
 817                 err = class_cleanup(obd, lcfg);
 818                 GOTO(out, err = 0);
 819         }
 820         case LCFG_ADD_CONN: {
 821                 err = class_add_conn(obd, lcfg);
 822                 GOTO(out, err = 0);
 823         }
 824         case LCFG_DEL_CONN: {
 825                 err = class_del_conn(obd, lcfg);
 826                 GOTO(out, err = 0);
 827         }
 828         case LCFG_POOL_NEW: {
 829                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
 830                 GOTO(out, err = 0);
 831                 break;
 832         }
 833         case LCFG_POOL_ADD: {
 834                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
 835                                    lustre_cfg_string(lcfg, 3));
 836                 GOTO(out, err = 0);
 837                 break;
 838         }
 839         case LCFG_POOL_REM: {
 840                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
 841                                    lustre_cfg_string(lcfg, 3));
 842                 GOTO(out, err = 0);
 843                 break;
 844         }
 845         case LCFG_POOL_DEL: {
 846                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
 847                 GOTO(out, err = 0);
 848                 break;
 849         }
 850         default: {
 851                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
 852                 GOTO(out, err);
 853
 854         }
 855         }
 856 out:
 857         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
 858                 CWARN("Ignoring error %d on optional command %#x\n", err,
 859                       lcfg->lcfg_command);
 860                 err = 0;
 861         }
 862         return err;
 863 }
 864
 865 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 866                              struct lustre_cfg *lcfg, void *data)
 867 {
 868 #ifdef __KERNEL__
 869         struct lprocfs_vars *var;
 870         char *key, *sval;
 871         int i, keylen, vallen;
 872         int matched = 0, j = 0;
 873         int rc = 0;
 874         ENTRY;
 875
 876         if (lcfg->lcfg_command != LCFG_PARAM) {
 877                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 878                 RETURN(-EINVAL);
 879         }
 880
 881         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
 882            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
 883            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
 884         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
 885                 key = lustre_cfg_buf(lcfg, i);
 886                 /* Strip off prefix */
 887                 class_match_param(key, prefix, &key);
 888                 sval = strchr(key, '=');
 889                 if (!sval || (*(sval + 1) == 0)) {
 890                         CERROR("Can't parse param %s (missing '=')\n", key);
 891                         /* rc = -EINVAL; continue parsing other params */
 892                         continue;
 893                 }
 894                 keylen = sval - key;
 895                 sval++;
 896                 vallen = strlen(sval);
 897                 matched = 0;
 898                 j = 0;
 899                 /* Search proc entries */
 900                 while (lvars[j].name) {
 901                         var = &lvars[j];
 902                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
 903                             keylen == strlen(var->name)) {
 904                                 matched++;
 905                                 rc = -EROFS;
 906                                 if (var->write_fptr) {
 907                                         mm_segment_t oldfs;
 908                                         oldfs = get_fs();
 909                                         set_fs(KERNEL_DS);
 910                                         rc = (var->write_fptr)(NULL, sval,
 911                                                                vallen, data);
 912                                         set_fs(oldfs);
 913                                 }
 914                                 if (rc < 0)
 915                                         CERROR("writing proc entry %s err %d\n",
 916                                                var->name, rc);
 917                                 break;
 918                         }
 919                         j++;
 920                 }
 921                 if (!matched) {
 922                         /* If the prefix doesn't match, return error so we
 923                            can pass it down the stack */
 924                         if (strnchr(key, keylen, '.'))
 925                             RETURN(-ENOSYS);
 926                         CERROR("%s: unknown param %s\n",
 927                                (char *)lustre_cfg_string(lcfg, 0), key);
 928                         /* rc = -EINVAL;        continue parsing other params */
 929                 } else {
 930                         LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
 931                                       lustre_cfg_string(lcfg, 0),
 932                                       (int)strlen(prefix) - 1, prefix,
 933                                       (int)(sval - key - 1), key, sval);
 934                 }
 935         }
 936
 937         if (rc > 0)
 938                 rc = 0;
 939         RETURN(rc);
 940 #else
 941         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
 942         /* Don't throw config error */
 943         RETURN(0);
 944 #endif
 945 }
 946
 947 int class_config_dump_handler(struct llog_handle * handle,
 948                               struct llog_rec_hdr *rec, void *data);
 949
 950 #ifdef __KERNEL__
 951 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
 952 #else
 953 #define lustre_check_exclusion(a,b)  0
 954 #endif
 955
 956 static int class_config_llog_handler(struct llog_handle * handle,
 957                                      struct llog_rec_hdr *rec, void *data)
 958 {
 959         struct config_llog_instance *clli = data;
 960         int cfg_len = rec->lrh_len;
 961         char *cfg_buf = (char*) (rec + 1);
 962         int rc = 0;
 963         ENTRY;
 964
 965         //class_config_dump_handler(handle, rec, data);
 966
 967         switch (rec->lrh_type) {
 968         case OBD_CFG_REC: {
 969                 struct lustre_cfg *lcfg, *lcfg_new;
 970                 struct lustre_cfg_bufs bufs;
 971                 char *inst_name = NULL;
 972                 int inst_len = 0;
 973                 int inst = 0, swab = 0;
 974
 975                 lcfg = (struct lustre_cfg *)cfg_buf;
 976                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
 977                         lustre_swab_lustre_cfg(lcfg);
 978                         swab = 1;
 979                 }
 980
 981                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
 982                 if (rc)
 983                         GOTO(out, rc);
 984
 985                 /* Figure out config state info */
 986                 if (lcfg->lcfg_command == LCFG_MARKER) {
 987                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
 988                         lustre_swab_cfg_marker(marker, swab,
 989                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
 990                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
 991                                clli->cfg_flags, marker->cm_flags);
 992                         if (marker->cm_flags & CM_START) {
 993                                 /* all previous flags off */
 994                                 clli->cfg_flags = CFG_F_MARKER;
 995                                 if (marker->cm_flags & CM_SKIP) {
 996                                         clli->cfg_flags |= CFG_F_SKIP;
 997                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
 998                                                marker->cm_step);
 999                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1000                                            lustre_check_exclusion(clli->cfg_sb,
1001                                                           marker->cm_tgtname)) {
1002                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1003                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1004                                                marker->cm_step);
1005                                 }
1006                         } else if (marker->cm_flags & CM_END) {
1007                                 clli->cfg_flags = 0;
1008                         }
1009                 }
1010                 /* A config command without a start marker before it is
1011                    illegal (post 146) */
1012                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1013                     !(clli->cfg_flags & CFG_F_MARKER) &&
1014                     (lcfg->lcfg_command != LCFG_MARKER)) {
1015                         CWARN("Config not inside markers, ignoring! "
1016                               "(inst: %s, uuid: %s, flags: %#x)\n",
1017                               clli->cfg_instance ? clli->cfg_instance : "<null>",
1018                               clli->cfg_uuid.uuid, clli->cfg_flags);
1019                         clli->cfg_flags |= CFG_F_SKIP;
1020                 }
1021                 if (clli->cfg_flags & CFG_F_SKIP) {
1022                         CDEBUG(D_CONFIG, "skipping %#x\n",
1023                                clli->cfg_flags);
1024                         rc = 0;
1025                         /* No processing! */
1026                         break;
1027                 }
1028
1029                 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
1030                     (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
1031                         /* Add inactive instead */
1032                         lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1033
1034                 lustre_cfg_bufs_init(&bufs, lcfg);
1035
1036                 if (clli && clli->cfg_instance &&
1037                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1038                         inst = 1;
1039                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1040                                 strlen(clli->cfg_instance) + 1;
1041                         OBD_ALLOC(inst_name, inst_len);
1042                         if (inst_name == NULL)
1043                                 GOTO(out, rc = -ENOMEM);
1044                         sprintf(inst_name, "%s-%s",
1045                                 lustre_cfg_string(lcfg, 0),
1046                                 clli->cfg_instance);
1047                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1048                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1049                                lcfg->lcfg_command, inst_name);
1050                 }
1051
1052                 /* we override the llog's uuid for clients, to insure they
1053                 are unique */
1054                 if (clli && clli->cfg_instance &&
1055                     lcfg->lcfg_command == LCFG_ATTACH) {
1056                         lustre_cfg_bufs_set_string(&bufs, 2,
1057                                                    clli->cfg_uuid.uuid);
1058                 }
1059
1060                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1061
1062                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1063                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1064
1065                 /* XXX Hack to try to remain binary compatible with
1066                  * pre-newconfig logs */
1067                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1068                     (lcfg->lcfg_nid >> 32) == 0) {
1069                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1070
1071                         lcfg_new->lcfg_nid =
1072                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1073                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1074                               lcfg->lcfg_nal, addr,
1075                               libcfs_nid2str(lcfg_new->lcfg_nid));
1076                 } else {
1077                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1078                 }
1079
1080                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1081
1082                 rc = class_process_config(lcfg_new);
1083                 lustre_cfg_free(lcfg_new);
1084
1085                 if (inst)
1086                         OBD_FREE(inst_name, inst_len);
1087                 break;
1088         }
1089         default:
1090                 CERROR("Unknown llog record type %#x encountered\n",
1091                        rec->lrh_type);
1092                 break;
1093         }
1094 out:
1095         if (rc) {
1096                 CERROR("Err %d on cfg command:\n", rc);
1097                 class_config_dump_handler(handle, rec, data);
1098         }
1099         RETURN(rc);
1100 }
1101
1102 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1103                             struct config_llog_instance *cfg)
1104 {
1105         struct llog_process_cat_data cd = {0, 0};
1106         struct llog_handle *llh;
1107         int rc, rc2;
1108         ENTRY;
1109
1110         CDEBUG(D_INFO, "looking up llog %s\n", name);
1111         rc = llog_create(ctxt, &llh, NULL, name);
1112         if (rc)
1113                 RETURN(rc);
1114
1115         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1116         if (rc)
1117                 GOTO(parse_out, rc);
1118
1119         /* continue processing from where we last stopped to end-of-log */
1120         if (cfg)
1121                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1122         cd.lpcd_last_idx = 0;
1123
1124         rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1125
1126         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1127                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1128
1129         if (cfg)
1130                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1131
1132 parse_out:
1133         rc2 = llog_close(llh);
1134         if (rc == 0)
1135                 rc = rc2;
1136
1137         RETURN(rc);
1138 }
1139
1140 int class_config_dump_handler(struct llog_handle * handle,
1141                               struct llog_rec_hdr *rec, void *data)
1142 {
1143         int cfg_len = rec->lrh_len;
1144         char *cfg_buf = (char*) (rec + 1);
1145         char *outstr, *ptr, *end;
1146         int rc = 0;
1147         ENTRY;
1148
1149         OBD_ALLOC(outstr, 256);
1150         end = outstr + 256;
1151         ptr = outstr;
1152         if (!outstr) {
1153                 RETURN(-ENOMEM);
1154         }
1155         if (rec->lrh_type == OBD_CFG_REC) {
1156                 struct lustre_cfg *lcfg;
1157                 int i;
1158
1159                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1160                 if (rc)
1161                         GOTO(out, rc);
1162                 lcfg = (struct lustre_cfg *)cfg_buf;
1163
1164                 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1165                                 lcfg->lcfg_command);
1166                 if (lcfg->lcfg_flags) {
1167                         ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1168                                         lcfg->lcfg_flags);
1169                 }
1170                 if (lcfg->lcfg_num) {
1171                         ptr += snprintf(ptr, end-ptr, "num=%#08x ",
1172                                         lcfg->lcfg_num);
1173                 }
1174                 if (lcfg->lcfg_nid) {
1175                         ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1176                                         libcfs_nid2str(lcfg->lcfg_nid),
1177                                         lcfg->lcfg_nid);
1178                 }
1179                 if (lcfg->lcfg_command == LCFG_MARKER) {
1180                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1181                         ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1182                                         marker->cm_step, marker->cm_flags,
1183                                         marker->cm_tgtname, marker->cm_comment);
1184                 } else {
1185                         for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1186                                 ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1187                                                 lustre_cfg_string(lcfg, i));
1188                         }
1189                 }
1190                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1191         } else {
1192                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1193                 rc = -EINVAL;
1194         }
1195 out:
1196         OBD_FREE(outstr, 256);
1197         RETURN(rc);
1198 }
1199
1200 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1201                            struct config_llog_instance *cfg)
1202 {
1203         struct llog_handle *llh;
1204         int rc, rc2;
1205         ENTRY;
1206
1207         LCONSOLE_INFO("Dumping config log %s\n", name);
1208
1209         rc = llog_create(ctxt, &llh, NULL, name);
1210         if (rc)
1211                 RETURN(rc);
1212
1213         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1214         if (rc)
1215                 GOTO(parse_out, rc);
1216
1217         rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1218 parse_out:
1219         rc2 = llog_close(llh);
1220         if (rc == 0)
1221                 rc = rc2;
1222
1223         LCONSOLE_INFO("End config log %s\n", name);
1224         RETURN(rc);
1225
1226 }
1227
1228 /* Cleanup and detach */
1229 int class_manual_cleanup(struct obd_device *obd)
1230 {
1231         struct lustre_cfg *lcfg;
1232         struct lustre_cfg_bufs bufs;
1233         int rc;
1234         char flags[3]="";
1235         ENTRY;
1236
1237         if (!obd) {
1238                 CERROR("empty cleanup\n");
1239                 RETURN(-EALREADY);
1240         }
1241
1242         if (obd->obd_force)
1243                 strcat(flags, "F");
1244         if (obd->obd_fail)
1245                 strcat(flags, "A");
1246
1247         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1248                obd->obd_name, flags);
1249
1250         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1251         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1252         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1253
1254         rc = class_process_config(lcfg);
1255         if (rc) {
1256                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1257                 GOTO(out, rc);
1258         }
1259
1260         /* the lcfg is almost the same for both ops */
1261         lcfg->lcfg_command = LCFG_DETACH;
1262         rc = class_process_config(lcfg);
1263         if (rc)
1264                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1265 out:
1266         lustre_cfg_free(lcfg);
1267         RETURN(rc);
1268 }
1269
1270 /*
1271  * uuid<->export lustre hash operations
1272  */
1273
1274 static unsigned
1275 uuid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1276 {
1277         return lh_djb2_hash(((struct obd_uuid *)key)->uuid,
1278                             sizeof(((struct obd_uuid *)key)->uuid), mask);
1279 }
1280
1281 static void *
1282 uuid_key(struct hlist_node *hnode)
1283 {
1284         struct obd_export *exp;
1285
1286         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1287
1288         RETURN(&exp->exp_client_uuid);
1289 }
1290
1291 /*
1292  * NOTE: It is impossible to find an export that is in failed
1293  *       state with this function
1294  */
1295 static int
1296 uuid_compare(void *key, struct hlist_node *hnode)
1297 {
1298         struct obd_export *exp;
1299
1300         LASSERT(key);
1301         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1302
1303         RETURN(obd_uuid_equals((struct obd_uuid *)key,&exp->exp_client_uuid) &&
1304                !exp->exp_failed);
1305 }
1306
1307 static void *
1308 uuid_export_get(struct hlist_node *hnode)
1309 {
1310         struct obd_export *exp;
1311
1312         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1313         class_export_get(exp);
1314
1315         RETURN(exp);
1316 }
1317
1318 static void *
1319 uuid_export_put(struct hlist_node *hnode)
1320 {
1321         struct obd_export *exp;
1322
1323         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1324         class_export_put(exp);
1325
1326         RETURN(exp);
1327 }
1328
1329 static lustre_hash_ops_t uuid_hash_ops = {
1330         .lh_hash    = uuid_hash,
1331         .lh_key     = uuid_key,
1332         .lh_compare = uuid_compare,
1333         .lh_get     = uuid_export_get,
1334         .lh_put     = uuid_export_put,
1335 };
1336
1337
1338 /*
1339  * nid<->export hash operations
1340  */
1341
1342 static unsigned
1343 nid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1344 {
1345         return lh_djb2_hash(key, sizeof(lnet_nid_t), mask);
1346 }
1347
1348 static void *
1349 nid_key(struct hlist_node *hnode)
1350 {
1351         struct obd_export *exp;
1352
1353         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1354
1355         RETURN(&exp->exp_connection->c_peer.nid);
1356 }
1357
1358 /*
1359  * NOTE: It is impossible to find an export that is in failed
1360  *       state with this function
1361  */
1362 static int
1363 nid_compare(void *key, struct hlist_node *hnode)
1364 {
1365         struct obd_export *exp;
1366
1367         LASSERT(key);
1368         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1369
1370         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1371                !exp->exp_failed);
1372 }
1373
1374 static void *
1375 nid_export_get(struct hlist_node *hnode)
1376 {
1377         struct obd_export *exp;
1378
1379         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1380         class_export_get(exp);
1381
1382         RETURN(exp);
1383 }
1384
1385 static void *
1386 nid_export_put(struct hlist_node *hnode)
1387 {
1388         struct obd_export *exp;
1389
1390         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1391         class_export_put(exp);
1392
1393         RETURN(exp);
1394 }
1395
1396 static lustre_hash_ops_t nid_hash_ops = {
1397         .lh_hash    = nid_hash,
1398         .lh_key     = nid_key,
1399         .lh_compare = nid_compare,
1400         .lh_get     = nid_export_get,
1401         .lh_put     = nid_export_put,
1402 };
1403
1404
1405 /*
1406  * nid<->nidstats hash operations
1407  */
1408
1409 static void *
1410 nidstats_key(struct hlist_node *hnode)
1411 {
1412         struct nid_stat *ns;
1413
1414         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1415
1416         RETURN(&ns->nid);
1417 }
1418
1419 static int
1420 nidstats_compare(void *key, struct hlist_node *hnode)
1421 {
1422         RETURN(*(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key);
1423 }
1424
1425 static void *
1426 nidstats_get(struct hlist_node *hnode)
1427 {
1428         struct nid_stat *ns;
1429
1430         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1431         ns->nid_exp_ref_count++;
1432
1433         RETURN(ns);
1434 }
1435
1436 static void *
1437 nidstats_put(struct hlist_node *hnode)
1438 {
1439         struct nid_stat *ns;
1440
1441         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1442         ns->nid_exp_ref_count--;
1443
1444         RETURN(ns);
1445 }
1446
1447 static lustre_hash_ops_t nid_stat_hash_ops = {
1448         .lh_hash    = nid_hash,
1449         .lh_key     = nidstats_key,
1450         .lh_compare = nidstats_compare,
1451         .lh_get     = nidstats_get,
1452         .lh_put     = nidstats_put,
1453 };