lustre/obdclass/obd_config.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, Intel Corporation.
  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 #include <lustre_disk.h>
  46 #else
  47 #include <liblustre.h>
  48 #include <string.h>
  49 #include <obd_class.h>
  50 #include <obd.h>
  51 #endif
  52 #include <lustre_ioctl.h>
  53 #include <lustre_log.h>
  54 #include <lprocfs_status.h>
  55 #include <lustre_param.h>
  56
  57 #include "llog_internal.h"
  58
  59 static cfs_hash_ops_t uuid_hash_ops;
  60 static cfs_hash_ops_t nid_hash_ops;
  61 static cfs_hash_ops_t nid_stat_hash_ops;
  62
  63 /*********** string parsing utils *********/
  64
  65 /* returns 0 if we find this key in the buffer, else 1 */
  66 int class_find_param(char *buf, char *key, char **valp)
  67 {
  68         char *ptr;
  69
  70         if (!buf)
  71                 return 1;
  72
  73         if ((ptr = strstr(buf, key)) == NULL)
  74                 return 1;
  75
  76         if (valp)
  77                 *valp = ptr + strlen(key);
  78
  79         return 0;
  80 }
  81 EXPORT_SYMBOL(class_find_param);
  82
  83 /**
  84  * Check whether the proc parameter \a param is an old parameter or not from
  85  * the array \a ptr which contains the mapping from old parameters to new ones.
  86  * If it's an old one, then return the pointer to the cfg_interop_param struc-
  87  * ture which contains both the old and new parameters.
  88  *
  89  * \param param                 proc parameter
  90  * \param ptr                   an array which contains the mapping from
  91  *                              old parameters to new ones
  92  *
  93  * \retval valid-pointer        pointer to the cfg_interop_param structure
  94  *                              which contains the old and new parameters
  95  * \retval NULL                 \a param or \a ptr is NULL,
  96  *                              or \a param is not an old parameter
  97  */
  98 struct cfg_interop_param *class_find_old_param(const char *param,
  99                                                struct cfg_interop_param *ptr)
 100 {
 101         char *value = NULL;
 102         int   name_len = 0;
 103
 104         if (param == NULL || ptr == NULL)
 105                 RETURN(NULL);
 106
 107         value = strchr(param, '=');
 108         if (value == NULL)
 109                 name_len = strlen(param);
 110         else
 111                 name_len = value - param;
 112
 113         while (ptr->old_param != NULL) {
 114                 if (strncmp(param, ptr->old_param, name_len) == 0 &&
 115                     name_len == strlen(ptr->old_param))
 116                         RETURN(ptr);
 117                 ptr++;
 118         }
 119
 120         RETURN(NULL);
 121 }
 122 EXPORT_SYMBOL(class_find_old_param);
 123
 124 /**
 125  * Finds a parameter in \a params and copies it to \a copy.
 126  *
 127  * Leading spaces are skipped. Next space or end of string is the
 128  * parameter terminator with the exception that spaces inside single or double
 129  * quotes get included into a parameter. The parameter is copied into \a copy
 130  * which has to be allocated big enough by a caller, quotes are stripped in
 131  * the copy and the copy is terminated by 0.
 132  *
 133  * On return \a params is set to next parameter or to NULL if last
 134  * parameter is returned.
 135  *
 136  * \retval 0 if parameter is returned in \a copy
 137  * \retval 1 otherwise
 138  * \retval -EINVAL if unbalanced quota is found
 139  */
 140 int class_get_next_param(char **params, char *copy)
 141 {
 142         char *q1, *q2, *str;
 143         int len;
 144
 145         str = *params;
 146         while (*str == ' ')
 147                 str++;
 148
 149         if (*str == '\0') {
 150                 *params = NULL;
 151                 return 1;
 152         }
 153
 154         while (1) {
 155                 q1 = strpbrk(str, " '\"");
 156                 if (q1 == NULL) {
 157                         len = strlen(str);
 158                         memcpy(copy, str, len);
 159                         copy[len] = '\0';
 160                         *params = NULL;
 161                         return 0;
 162                 }
 163                 len = q1 - str;
 164                 if (*q1 == ' ') {
 165                         memcpy(copy, str, len);
 166                         copy[len] = '\0';
 167                         *params = str + len;
 168                         return 0;
 169                 }
 170
 171                 memcpy(copy, str, len);
 172                 copy += len;
 173
 174                 /* search for the matching closing quote */
 175                 str = q1 + 1;
 176                 q2 = strchr(str, *q1);
 177                 if (q2 == NULL) {
 178                         CERROR("Unbalanced quota in parameters: \"%s\"\n",
 179                                *params);
 180                         return -EINVAL;
 181                 }
 182                 len = q2 - str;
 183                 memcpy(copy, str, len);
 184                 copy += len;
 185                 str = q2 + 1;
 186         }
 187         return 1;
 188 }
 189 EXPORT_SYMBOL(class_get_next_param);
 190
 191 /* returns 0 if this is the first key in the buffer, else 1.
 192    valp points to first char after key. */
 193 int class_match_param(char *buf, char *key, char **valp)
 194 {
 195         if (!buf)
 196                 return 1;
 197
 198         if (memcmp(buf, key, strlen(key)) != 0)
 199                 return 1;
 200
 201         if (valp)
 202                 *valp = buf + strlen(key);
 203
 204         return 0;
 205 }
 206 EXPORT_SYMBOL(class_match_param);
 207
 208 static int parse_nid(char *buf, void *value, int quiet)
 209 {
 210         lnet_nid_t *nid = (lnet_nid_t *)value;
 211
 212         *nid = libcfs_str2nid(buf);
 213         if (*nid != LNET_NID_ANY)
 214                 return 0;
 215
 216         if (!quiet)
 217                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
 218         return -EINVAL;
 219 }
 220
 221 static int parse_net(char *buf, void *value)
 222 {
 223         __u32 *net = (__u32 *)value;
 224
 225         *net = libcfs_str2net(buf);
 226         CDEBUG(D_INFO, "Net %s\n", libcfs_net2str(*net));
 227         return 0;
 228 }
 229
 230 enum {
 231         CLASS_PARSE_NID = 1,
 232         CLASS_PARSE_NET,
 233 };
 234
 235 /* 0 is good nid,
 236    1 not found
 237    < 0 error
 238    endh is set to next separator */
 239 static int class_parse_value(char *buf, int opc, void *value, char **endh,
 240                              int quiet)
 241 {
 242         char *endp;
 243         char  tmp;
 244         int   rc = 0;
 245
 246         if (!buf)
 247                 return 1;
 248         while (*buf == ',' || *buf == ':')
 249                 buf++;
 250         if (*buf == ' ' || *buf == '/' || *buf == '\0')
 251                 return 1;
 252
 253         /* nid separators or end of nids */
 254         endp = strpbrk(buf, ",: /");
 255         if (endp == NULL)
 256                 endp = buf + strlen(buf);
 257
 258         tmp = *endp;
 259         *endp = '\0';
 260         switch (opc) {
 261         default:
 262                 LBUG();
 263         case CLASS_PARSE_NID:
 264                 rc = parse_nid(buf, value, quiet);
 265                 break;
 266         case CLASS_PARSE_NET:
 267                 rc = parse_net(buf, value);
 268                 break;
 269         }
 270         *endp = tmp;
 271         if (rc != 0)
 272                 return rc;
 273         if (endh)
 274                 *endh = endp;
 275         return 0;
 276 }
 277
 278 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
 279 {
 280         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 0);
 281 }
 282 EXPORT_SYMBOL(class_parse_nid);
 283
 284 int class_parse_nid_quiet(char *buf, lnet_nid_t *nid, char **endh)
 285 {
 286         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 1);
 287 }
 288 EXPORT_SYMBOL(class_parse_nid_quiet);
 289
 290 int class_parse_net(char *buf, __u32 *net, char **endh)
 291 {
 292         return class_parse_value(buf, CLASS_PARSE_NET, (void *)net, endh, 0);
 293 }
 294 EXPORT_SYMBOL(class_parse_net);
 295
 296 /* 1 param contains key and match
 297  * 0 param contains key and not match
 298  * -1 param does not contain key
 299  */
 300 int class_match_nid(char *buf, char *key, lnet_nid_t nid)
 301 {
 302         lnet_nid_t tmp;
 303         int   rc = -1;
 304
 305         while (class_find_param(buf, key, &buf) == 0) {
 306                 /* please restrict to the nids pertaining to
 307                  * the specified nids */
 308                 while (class_parse_nid(buf, &tmp, &buf) == 0) {
 309                         if (tmp == nid)
 310                                 return 1;
 311                 }
 312                 rc = 0;
 313         }
 314         return rc;
 315 }
 316 EXPORT_SYMBOL(class_match_nid);
 317
 318 int class_match_net(char *buf, char *key, __u32 net)
 319 {
 320         __u32 tmp;
 321         int   rc = -1;
 322
 323         while (class_find_param(buf, key, &buf) == 0) {
 324                 /* please restrict to the nids pertaining to
 325                  * the specified networks */
 326                 while (class_parse_net(buf, &tmp, &buf) == 0) {
 327                         if (tmp == net)
 328                                 return 1;
 329                 }
 330                 rc = 0;
 331         }
 332         return rc;
 333 }
 334 EXPORT_SYMBOL(class_match_net);
 335
 336 /********************** class fns **********************/
 337
 338 /**
 339  * Create a new obd device and set the type, name and uuid.  If successful,
 340  * the new device can be accessed by either name or uuid.
 341  */
 342 int class_attach(struct lustre_cfg *lcfg)
 343 {
 344         struct obd_device *obd = NULL;
 345         char *typename, *name, *uuid;
 346         int rc, len;
 347         ENTRY;
 348
 349         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 350                 CERROR("No type passed!\n");
 351                 RETURN(-EINVAL);
 352         }
 353         typename = lustre_cfg_string(lcfg, 1);
 354
 355         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
 356                 CERROR("No name passed!\n");
 357                 RETURN(-EINVAL);
 358         }
 359         name = lustre_cfg_string(lcfg, 0);
 360
 361         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
 362                 CERROR("No UUID passed!\n");
 363                 RETURN(-EINVAL);
 364         }
 365         uuid = lustre_cfg_string(lcfg, 2);
 366
 367         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 368                MKSTR(typename), MKSTR(name), MKSTR(uuid));
 369
 370         obd = class_newdev(typename, name);
 371         if (IS_ERR(obd)) {
 372                 /* Already exists or out of obds */
 373                 rc = PTR_ERR(obd);
 374                 obd = NULL;
 375                 CERROR("Cannot create device %s of type %s : %d\n",
 376                        name, typename, rc);
 377                 GOTO(out, rc);
 378         }
 379         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
 380                  name, typename);
 381         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 382                  "obd %p obd_magic %08X != %08X\n",
 383                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 384         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
 385                  "%p obd_name %s != %s\n", obd, obd->obd_name, name);
 386
 387         rwlock_init(&obd->obd_pool_lock);
 388         obd->obd_pool_limit = 0;
 389         obd->obd_pool_slv = 0;
 390
 391         CFS_INIT_LIST_HEAD(&obd->obd_exports);
 392         CFS_INIT_LIST_HEAD(&obd->obd_unlinked_exports);
 393         CFS_INIT_LIST_HEAD(&obd->obd_delayed_exports);
 394         CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
 395         CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
 396         spin_lock_init(&obd->obd_nid_lock);
 397         spin_lock_init(&obd->obd_dev_lock);
 398         mutex_init(&obd->obd_dev_mutex);
 399         spin_lock_init(&obd->obd_osfs_lock);
 400         /* obd->obd_osfs_age must be set to a value in the distant
 401          * past to guarantee a fresh statfs is fetched on mount. */
 402         obd->obd_osfs_age = cfs_time_shift_64(-1000);
 403
 404         /* XXX belongs in setup not attach  */
 405         init_rwsem(&obd->obd_observer_link_sem);
 406         /* recovery data */
 407         cfs_init_timer(&obd->obd_recovery_timer);
 408         spin_lock_init(&obd->obd_recovery_task_lock);
 409         init_waitqueue_head(&obd->obd_next_transno_waitq);
 410         init_waitqueue_head(&obd->obd_evict_inprogress_waitq);
 411         CFS_INIT_LIST_HEAD(&obd->obd_req_replay_queue);
 412         CFS_INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
 413         CFS_INIT_LIST_HEAD(&obd->obd_final_req_queue);
 414         CFS_INIT_LIST_HEAD(&obd->obd_evict_list);
 415         INIT_LIST_HEAD(&obd->obd_lwp_list);
 416
 417         llog_group_init(&obd->obd_olg);
 418
 419         obd->obd_conn_inprogress = 0;
 420
 421         len = strlen(uuid);
 422         if (len >= sizeof(obd->obd_uuid)) {
 423                 CERROR("uuid must be < %d bytes long\n",
 424                        (int)sizeof(obd->obd_uuid));
 425                 GOTO(out, rc = -EINVAL);
 426         }
 427         memcpy(obd->obd_uuid.uuid, uuid, len);
 428
 429         /* Detach drops this */
 430         spin_lock(&obd->obd_dev_lock);
 431         atomic_set(&obd->obd_refcount, 1);
 432         spin_unlock(&obd->obd_dev_lock);
 433         lu_ref_init(&obd->obd_reference);
 434         lu_ref_add(&obd->obd_reference, "attach", obd);
 435
 436         obd->obd_attached = 1;
 437         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 438                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 439         RETURN(0);
 440  out:
 441         if (obd != NULL) {
 442                 class_release_dev(obd);
 443         }
 444         return rc;
 445 }
 446 EXPORT_SYMBOL(class_attach);
 447
 448 /** Create hashes, self-export, and call type-specific setup.
 449  * Setup is effectively the "start this obd" call.
 450  */
 451 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 452 {
 453         int err = 0;
 454         struct obd_export *exp;
 455         ENTRY;
 456
 457         LASSERT(obd != NULL);
 458         LASSERTF(obd == class_num2obd(obd->obd_minor),
 459                  "obd %p != obd_devs[%d] %p\n",
 460                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 461         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 462                  "obd %p obd_magic %08x != %08x\n",
 463                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 464
 465         /* have we attached a type to this device? */
 466         if (!obd->obd_attached) {
 467                 CERROR("Device %d not attached\n", obd->obd_minor);
 468                 RETURN(-ENODEV);
 469         }
 470
 471         if (obd->obd_set_up) {
 472                 CERROR("Device %d already setup (type %s)\n",
 473                        obd->obd_minor, obd->obd_type->typ_name);
 474                 RETURN(-EEXIST);
 475         }
 476
 477         /* is someone else setting us up right now? (attach inits spinlock) */
 478         spin_lock(&obd->obd_dev_lock);
 479         if (obd->obd_starting) {
 480                 spin_unlock(&obd->obd_dev_lock);
 481                 CERROR("Device %d setup in progress (type %s)\n",
 482                        obd->obd_minor, obd->obd_type->typ_name);
 483                 RETURN(-EEXIST);
 484         }
 485         /* just leave this on forever.  I can't use obd_set_up here because
 486            other fns check that status, and we're not actually set up yet. */
 487         obd->obd_starting = 1;
 488         obd->obd_uuid_hash = NULL;
 489         obd->obd_nid_hash = NULL;
 490         obd->obd_nid_stats_hash = NULL;
 491         spin_unlock(&obd->obd_dev_lock);
 492
 493         /* create an uuid-export lustre hash */
 494         obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
 495                                              HASH_UUID_CUR_BITS,
 496                                              HASH_UUID_MAX_BITS,
 497                                              HASH_UUID_BKT_BITS, 0,
 498                                              CFS_HASH_MIN_THETA,
 499                                              CFS_HASH_MAX_THETA,
 500                                              &uuid_hash_ops, CFS_HASH_DEFAULT);
 501         if (!obd->obd_uuid_hash)
 502                 GOTO(err_hash, err = -ENOMEM);
 503
 504         /* create a nid-export lustre hash */
 505         obd->obd_nid_hash = cfs_hash_create("NID_HASH",
 506                                             HASH_NID_CUR_BITS,
 507                                             HASH_NID_MAX_BITS,
 508                                             HASH_NID_BKT_BITS, 0,
 509                                             CFS_HASH_MIN_THETA,
 510                                             CFS_HASH_MAX_THETA,
 511                                             &nid_hash_ops, CFS_HASH_DEFAULT);
 512         if (!obd->obd_nid_hash)
 513                 GOTO(err_hash, err = -ENOMEM);
 514
 515         /* create a nid-stats lustre hash */
 516         obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
 517                                                   HASH_NID_STATS_CUR_BITS,
 518                                                   HASH_NID_STATS_MAX_BITS,
 519                                                   HASH_NID_STATS_BKT_BITS, 0,
 520                                                   CFS_HASH_MIN_THETA,
 521                                                   CFS_HASH_MAX_THETA,
 522                                                   &nid_stat_hash_ops, CFS_HASH_DEFAULT);
 523         if (!obd->obd_nid_stats_hash)
 524                 GOTO(err_hash, err = -ENOMEM);
 525
 526         exp = class_new_export(obd, &obd->obd_uuid);
 527         if (IS_ERR(exp))
 528                 GOTO(err_hash, err = PTR_ERR(exp));
 529
 530         obd->obd_self_export = exp;
 531         cfs_list_del_init(&exp->exp_obd_chain_timed);
 532         class_export_put(exp);
 533
 534         err = obd_setup(obd, lcfg);
 535         if (err)
 536                 GOTO(err_exp, err);
 537
 538         obd->obd_set_up = 1;
 539
 540         spin_lock(&obd->obd_dev_lock);
 541         /* cleanup drops this */
 542         class_incref(obd, "setup", obd);
 543         spin_unlock(&obd->obd_dev_lock);
 544
 545         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 546                obd->obd_name, obd->obd_uuid.uuid);
 547
 548         RETURN(0);
 549 err_exp:
 550         if (obd->obd_self_export) {
 551                 class_unlink_export(obd->obd_self_export);
 552                 obd->obd_self_export = NULL;
 553         }
 554 err_hash:
 555         if (obd->obd_uuid_hash) {
 556                 cfs_hash_putref(obd->obd_uuid_hash);
 557                 obd->obd_uuid_hash = NULL;
 558         }
 559         if (obd->obd_nid_hash) {
 560                 cfs_hash_putref(obd->obd_nid_hash);
 561                 obd->obd_nid_hash = NULL;
 562         }
 563         if (obd->obd_nid_stats_hash) {
 564                 cfs_hash_putref(obd->obd_nid_stats_hash);
 565                 obd->obd_nid_stats_hash = NULL;
 566         }
 567         obd->obd_starting = 0;
 568         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 569         return err;
 570 }
 571 EXPORT_SYMBOL(class_setup);
 572
 573 /** We have finished using this obd and are ready to destroy it.
 574  * There can be no more references to this obd.
 575  */
 576 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 577 {
 578         ENTRY;
 579
 580         if (obd->obd_set_up) {
 581                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 582                 RETURN(-EBUSY);
 583         }
 584
 585         spin_lock(&obd->obd_dev_lock);
 586         if (!obd->obd_attached) {
 587                 spin_unlock(&obd->obd_dev_lock);
 588                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 589                 RETURN(-ENODEV);
 590         }
 591         obd->obd_attached = 0;
 592         spin_unlock(&obd->obd_dev_lock);
 593
 594         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 595                obd->obd_name, obd->obd_uuid.uuid);
 596
 597         class_decref(obd, "attach", obd);
 598         RETURN(0);
 599 }
 600 EXPORT_SYMBOL(class_detach);
 601
 602 /** Start shutting down the obd.  There may be in-progess ops when
 603  * this is called.  We tell them to start shutting down with a call
 604  * to class_disconnect_exports().
 605  */
 606 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 607 {
 608         int err = 0;
 609         char *flag;
 610         ENTRY;
 611
 612         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 613
 614         if (!obd->obd_set_up) {
 615                 CERROR("Device %d not setup\n", obd->obd_minor);
 616                 RETURN(-ENODEV);
 617         }
 618
 619         spin_lock(&obd->obd_dev_lock);
 620         if (obd->obd_stopping) {
 621                 spin_unlock(&obd->obd_dev_lock);
 622                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 623                 RETURN(-ENODEV);
 624         }
 625         /* Leave this on forever */
 626         obd->obd_stopping = 1;
 627
 628         /* wait for already-arrived-connections to finish. */
 629         while (obd->obd_conn_inprogress > 0) {
 630                 spin_unlock(&obd->obd_dev_lock);
 631
 632                 cond_resched();
 633
 634                 spin_lock(&obd->obd_dev_lock);
 635         }
 636         spin_unlock(&obd->obd_dev_lock);
 637
 638         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 639                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 640                         switch (*flag) {
 641                         case 'F':
 642                                 obd->obd_force = 1;
 643                                 break;
 644                         case 'A':
 645                                 LCONSOLE_WARN("Failing over %s\n",
 646                                               obd->obd_name);
 647                                 obd->obd_fail = 1;
 648                                 obd->obd_no_transno = 1;
 649                                 obd->obd_no_recov = 1;
 650                                 if (OBP(obd, iocontrol)) {
 651                                         obd_iocontrol(OBD_IOC_SYNC,
 652                                                       obd->obd_self_export,
 653                                                       0, NULL, NULL);
 654                                 }
 655                                 break;
 656                         default:
 657                                 CERROR("Unrecognised flag '%c'\n", *flag);
 658                         }
 659         }
 660
 661         LASSERT(obd->obd_self_export);
 662
 663         /* The three references that should be remaining are the
 664          * obd_self_export and the attach and setup references. */
 665         if (atomic_read(&obd->obd_refcount) > 3) {
 666                 /* refcounf - 3 might be the number of real exports
 667                    (excluding self export). But class_incref is called
 668                    by other things as well, so don't count on it. */
 669                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 670                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 671                 dump_exports(obd, 0);
 672                 class_disconnect_exports(obd);
 673         }
 674
 675         /* Precleanup, we must make sure all exports get destroyed. */
 676         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 677         if (err)
 678                 CERROR("Precleanup %s returned %d\n",
 679                        obd->obd_name, err);
 680
 681         /* destroy an uuid-export hash body */
 682         if (obd->obd_uuid_hash) {
 683                 cfs_hash_putref(obd->obd_uuid_hash);
 684                 obd->obd_uuid_hash = NULL;
 685         }
 686
 687         /* destroy a nid-export hash body */
 688         if (obd->obd_nid_hash) {
 689                 cfs_hash_putref(obd->obd_nid_hash);
 690                 obd->obd_nid_hash = NULL;
 691         }
 692
 693         /* destroy a nid-stats hash body */
 694         if (obd->obd_nid_stats_hash) {
 695                 cfs_hash_putref(obd->obd_nid_stats_hash);
 696                 obd->obd_nid_stats_hash = NULL;
 697         }
 698
 699         class_decref(obd, "setup", obd);
 700         obd->obd_set_up = 0;
 701
 702         RETURN(0);
 703 }
 704 EXPORT_SYMBOL(class_cleanup);
 705
 706 struct obd_device *class_incref(struct obd_device *obd,
 707                                 const char *scope, const void *source)
 708 {
 709         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 710         atomic_inc(&obd->obd_refcount);
 711         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 712                atomic_read(&obd->obd_refcount));
 713
 714         return obd;
 715 }
 716 EXPORT_SYMBOL(class_incref);
 717
 718 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 719 {
 720         int err;
 721         int refs;
 722
 723         spin_lock(&obd->obd_dev_lock);
 724         atomic_dec(&obd->obd_refcount);
 725         refs = atomic_read(&obd->obd_refcount);
 726         spin_unlock(&obd->obd_dev_lock);
 727         lu_ref_del(&obd->obd_reference, scope, source);
 728
 729         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 730
 731         if ((refs == 1) && obd->obd_stopping) {
 732                 /* All exports have been destroyed; there should
 733                    be no more in-progress ops by this point.*/
 734
 735                 spin_lock(&obd->obd_self_export->exp_lock);
 736                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
 737                 spin_unlock(&obd->obd_self_export->exp_lock);
 738
 739                 /* note that we'll recurse into class_decref again */
 740                 class_unlink_export(obd->obd_self_export);
 741                 return;
 742         }
 743
 744         if (refs == 0) {
 745                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 746                        obd->obd_name, obd->obd_uuid.uuid);
 747                 LASSERT(!obd->obd_attached);
 748                 if (obd->obd_stopping) {
 749                         /* If we're not stopping, we were never set up */
 750                         err = obd_cleanup(obd);
 751                         if (err)
 752                                 CERROR("Cleanup %s returned %d\n",
 753                                        obd->obd_name, err);
 754                 }
 755
 756                 class_release_dev(obd);
 757         }
 758 }
 759 EXPORT_SYMBOL(class_decref);
 760
 761 /** Add a failover nid location.
 762  * Client obd types contact server obd types using this nid list.
 763  */
 764 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 765 {
 766         struct obd_import *imp;
 767         struct obd_uuid uuid;
 768         int rc;
 769         ENTRY;
 770
 771         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 772             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 773                 CERROR("invalid conn_uuid\n");
 774                 RETURN(-EINVAL);
 775         }
 776         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 777             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 778             strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) &&
 779             strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) &&
 780             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 781                 CERROR("can't add connection on non-client dev\n");
 782                 RETURN(-EINVAL);
 783         }
 784
 785         imp = obd->u.cli.cl_import;
 786         if (!imp) {
 787                 CERROR("try to add conn on immature client dev\n");
 788                 RETURN(-EINVAL);
 789         }
 790
 791         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 792         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 793
 794         RETURN(rc);
 795 }
 796 EXPORT_SYMBOL(class_add_conn);
 797
 798 /** Remove a failover nid location.
 799  */
 800 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 801 {
 802         struct obd_import *imp;
 803         struct obd_uuid uuid;
 804         int rc;
 805         ENTRY;
 806
 807         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 808             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 809                 CERROR("invalid conn_uuid\n");
 810                 RETURN(-EINVAL);
 811         }
 812         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 813             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 814                 CERROR("can't del connection on non-client dev\n");
 815                 RETURN(-EINVAL);
 816         }
 817
 818         imp = obd->u.cli.cl_import;
 819         if (!imp) {
 820                 CERROR("try to del conn on immature client dev\n");
 821                 RETURN(-EINVAL);
 822         }
 823
 824         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 825         rc = obd_del_conn(imp, &uuid);
 826
 827         RETURN(rc);
 828 }
 829
 830 CFS_LIST_HEAD(lustre_profile_list);
 831
 832 struct lustre_profile *class_get_profile(const char * prof)
 833 {
 834         struct lustre_profile *lprof;
 835
 836         ENTRY;
 837         cfs_list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 838                 if (!strcmp(lprof->lp_profile, prof)) {
 839                         RETURN(lprof);
 840                 }
 841         }
 842         RETURN(NULL);
 843 }
 844 EXPORT_SYMBOL(class_get_profile);
 845
 846 /** Create a named "profile".
 847  * This defines the mdc and osc names to use for a client.
 848  * This also is used to define the lov to be used by a mdt.
 849  */
 850 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 851                       int mdclen, char *mdc)
 852 {
 853         struct lustre_profile *lprof;
 854         int err = 0;
 855         ENTRY;
 856
 857         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 858
 859         OBD_ALLOC(lprof, sizeof(*lprof));
 860         if (lprof == NULL)
 861                 RETURN(-ENOMEM);
 862         CFS_INIT_LIST_HEAD(&lprof->lp_list);
 863
 864         LASSERT(proflen == (strlen(prof) + 1));
 865         OBD_ALLOC(lprof->lp_profile, proflen);
 866         if (lprof->lp_profile == NULL)
 867                 GOTO(out, err = -ENOMEM);
 868         memcpy(lprof->lp_profile, prof, proflen);
 869
 870         LASSERT(osclen == (strlen(osc) + 1));
 871         OBD_ALLOC(lprof->lp_dt, osclen);
 872         if (lprof->lp_dt == NULL)
 873                 GOTO(out, err = -ENOMEM);
 874         memcpy(lprof->lp_dt, osc, osclen);
 875
 876         if (mdclen > 0) {
 877                 LASSERT(mdclen == (strlen(mdc) + 1));
 878                 OBD_ALLOC(lprof->lp_md, mdclen);
 879                 if (lprof->lp_md == NULL)
 880                         GOTO(out, err = -ENOMEM);
 881                 memcpy(lprof->lp_md, mdc, mdclen);
 882         }
 883
 884         cfs_list_add(&lprof->lp_list, &lustre_profile_list);
 885         RETURN(err);
 886
 887 out:
 888         if (lprof->lp_md)
 889                 OBD_FREE(lprof->lp_md, mdclen);
 890         if (lprof->lp_dt)
 891                 OBD_FREE(lprof->lp_dt, osclen);
 892         if (lprof->lp_profile)
 893                 OBD_FREE(lprof->lp_profile, proflen);
 894         OBD_FREE(lprof, sizeof(*lprof));
 895         RETURN(err);
 896 }
 897
 898 void class_del_profile(const char *prof)
 899 {
 900         struct lustre_profile *lprof;
 901         ENTRY;
 902
 903         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 904
 905         lprof = class_get_profile(prof);
 906         if (lprof) {
 907                 cfs_list_del(&lprof->lp_list);
 908                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 909                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 910                 if (lprof->lp_md)
 911                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 912                 OBD_FREE(lprof, sizeof *lprof);
 913         }
 914         EXIT;
 915 }
 916 EXPORT_SYMBOL(class_del_profile);
 917
 918 /* COMPAT_146 */
 919 void class_del_profiles(void)
 920 {
 921         struct lustre_profile *lprof, *n;
 922         ENTRY;
 923
 924         cfs_list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 925                 cfs_list_del(&lprof->lp_list);
 926                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 927                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 928                 if (lprof->lp_md)
 929                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 930                 OBD_FREE(lprof, sizeof *lprof);
 931         }
 932         EXIT;
 933 }
 934 EXPORT_SYMBOL(class_del_profiles);
 935
 936 static int class_set_global(char *ptr, int val, struct lustre_cfg *lcfg)
 937 {
 938         ENTRY;
 939         if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
 940                 at_min = val;
 941         else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
 942                 at_max = val;
 943         else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
 944                 at_extra = val;
 945         else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
 946                 at_early_margin = val;
 947         else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
 948                 at_history = val;
 949         else if (class_match_param(ptr, PARAM_JOBID_VAR, NULL) == 0)
 950                 strlcpy(obd_jobid_var, lustre_cfg_string(lcfg, 2),
 951                         JOBSTATS_JOBID_VAR_MAX_LEN + 1);
 952         else
 953                 RETURN(-EINVAL);
 954
 955         CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
 956         RETURN(0);
 957 }
 958
 959
 960 /* We can't call ll_process_config or lquota_process_config directly because
 961  * it lives in a module that must be loaded after this one. */
 962 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
 963 static int (*quota_process_config)(struct lustre_cfg *lcfg) = NULL;
 964
 965 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 966 {
 967         client_process_config = cpc;
 968 }
 969 EXPORT_SYMBOL(lustre_register_client_process_config);
 970
 971 /**
 972  * Rename the proc parameter in \a cfg with a new name \a new_name.
 973  *
 974  * \param cfg      config structure which contains the proc parameter
 975  * \param new_name new name of the proc parameter
 976  *
 977  * \retval valid-pointer    pointer to the newly-allocated config structure
 978  *                          which contains the renamed proc parameter
 979  * \retval ERR_PTR(-EINVAL) if \a cfg or \a new_name is NULL, or \a cfg does
 980  *                          not contain a proc parameter
 981  * \retval ERR_PTR(-ENOMEM) if memory allocation failure occurs
 982  */
 983 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
 984                                      const char *new_name)
 985 {
 986         struct lustre_cfg_bufs  *bufs = NULL;
 987         struct lustre_cfg       *new_cfg = NULL;
 988         char                    *param = NULL;
 989         char                    *new_param = NULL;
 990         char                    *value = NULL;
 991         int                      name_len = 0;
 992         int                      new_len = 0;
 993         ENTRY;
 994
 995         if (cfg == NULL || new_name == NULL)
 996                 RETURN(ERR_PTR(-EINVAL));
 997
 998         param = lustre_cfg_string(cfg, 1);
 999         if (param == NULL)
1000                 RETURN(ERR_PTR(-EINVAL));
1001
1002         value = strchr(param, '=');
1003         if (value == NULL)
1004                 name_len = strlen(param);
1005         else
1006                 name_len = value - param;
1007
1008         new_len = LUSTRE_CFG_BUFLEN(cfg, 1) + strlen(new_name) - name_len;
1009
1010         OBD_ALLOC(new_param, new_len);
1011         if (new_param == NULL)
1012                 RETURN(ERR_PTR(-ENOMEM));
1013
1014         strcpy(new_param, new_name);
1015         if (value != NULL)
1016                 strcat(new_param, value);
1017
1018         OBD_ALLOC_PTR(bufs);
1019         if (bufs == NULL) {
1020                 OBD_FREE(new_param, new_len);
1021                 RETURN(ERR_PTR(-ENOMEM));
1022         }
1023
1024         lustre_cfg_bufs_reset(bufs, NULL);
1025         lustre_cfg_bufs_init(bufs, cfg);
1026         lustre_cfg_bufs_set_string(bufs, 1, new_param);
1027
1028         new_cfg = lustre_cfg_new(cfg->lcfg_command, bufs);
1029
1030         OBD_FREE(new_param, new_len);
1031         OBD_FREE_PTR(bufs);
1032         if (new_cfg == NULL)
1033                 RETURN(ERR_PTR(-ENOMEM));
1034
1035         new_cfg->lcfg_num = cfg->lcfg_num;
1036         new_cfg->lcfg_flags = cfg->lcfg_flags;
1037         new_cfg->lcfg_nid = cfg->lcfg_nid;
1038         new_cfg->lcfg_nal = cfg->lcfg_nal;
1039
1040         RETURN(new_cfg);
1041 }
1042 EXPORT_SYMBOL(lustre_cfg_rename);
1043
1044 static int process_param2_config(struct lustre_cfg *lcfg)
1045 {
1046         char *param = lustre_cfg_string(lcfg, 1);
1047         char *upcall = lustre_cfg_string(lcfg, 2);
1048         char *argv[] = {
1049                 [0] = "/usr/sbin/lctl",
1050                 [1] = "set_param",
1051                 [2] = param,
1052                 [3] = NULL
1053         };
1054         struct timeval  start;
1055         struct timeval  end;
1056         int             rc;
1057         ENTRY;
1058
1059         /* Add upcall processing here. Now only lctl is supported */
1060         if (strcmp(upcall, LCTL_UPCALL) != 0) {
1061                 CERROR("Unsupported upcall %s\n", upcall);
1062                 RETURN(-EINVAL);
1063         }
1064
1065         do_gettimeofday(&start);
1066         rc = call_usermodehelper(argv[0], argv, NULL, 0);
1067         do_gettimeofday(&end);
1068
1069         if (rc < 0) {
1070                 CERROR("lctl: error invoking upcall %s %s %s: rc = %d; "
1071                        "time %ldus\n", argv[0], argv[1], argv[2], rc,
1072                        cfs_timeval_sub(&end, &start, NULL));
1073         } else {
1074                 CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
1075                        argv[0], argv[1], argv[2],
1076                        cfs_timeval_sub(&end, &start, NULL));
1077                        rc = 0;
1078         }
1079
1080         RETURN(rc);
1081 }
1082
1083 void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
1084 {
1085         quota_process_config = qpc;
1086 }
1087 EXPORT_SYMBOL(lustre_register_quota_process_config);
1088
1089 /** Process configuration commands given in lustre_cfg form.
1090  * These may come from direct calls (e.g. class_manual_cleanup)
1091  * or processing the config llog, or ioctl from lctl.
1092  */
1093 int class_process_config(struct lustre_cfg *lcfg)
1094 {
1095         struct obd_device *obd;
1096         int err;
1097
1098         LASSERT(lcfg && !IS_ERR(lcfg));
1099         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
1100
1101         /* Commands that don't need a device */
1102         switch(lcfg->lcfg_command) {
1103         case LCFG_ATTACH: {
1104                 err = class_attach(lcfg);
1105                 GOTO(out, err);
1106         }
1107         case LCFG_ADD_UUID: {
1108                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
1109                        " (%s)\n", lustre_cfg_string(lcfg, 1),
1110                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
1111
1112                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
1113                 GOTO(out, err);
1114         }
1115         case LCFG_DEL_UUID: {
1116                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
1117                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
1118                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
1119
1120                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
1121                 GOTO(out, err);
1122         }
1123         case LCFG_MOUNTOPT: {
1124                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
1125                        lustre_cfg_string(lcfg, 1),
1126                        lustre_cfg_string(lcfg, 2),
1127                        lustre_cfg_string(lcfg, 3));
1128                 /* set these mount options somewhere, so ll_fill_super
1129                  * can find them. */
1130                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
1131                                         lustre_cfg_string(lcfg, 1),
1132                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
1133                                         lustre_cfg_string(lcfg, 2),
1134                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
1135                                         lustre_cfg_string(lcfg, 3));
1136                 GOTO(out, err);
1137         }
1138         case LCFG_DEL_MOUNTOPT: {
1139                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
1140                        lustre_cfg_string(lcfg, 1));
1141                 class_del_profile(lustre_cfg_string(lcfg, 1));
1142                 GOTO(out, err = 0);
1143         }
1144         case LCFG_SET_TIMEOUT: {
1145                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
1146                        obd_timeout, lcfg->lcfg_num);
1147                 obd_timeout = max(lcfg->lcfg_num, 1U);
1148                 obd_timeout_set = 1;
1149                 GOTO(out, err = 0);
1150         }
1151         case LCFG_SET_LDLM_TIMEOUT: {
1152                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
1153                        ldlm_timeout, lcfg->lcfg_num);
1154                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
1155                 if (ldlm_timeout >= obd_timeout)
1156                         ldlm_timeout = max(obd_timeout / 3, 1U);
1157                 ldlm_timeout_set = 1;
1158                 GOTO(out, err = 0);
1159         }
1160         case LCFG_SET_UPCALL: {
1161                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
1162                 /* COMPAT_146 Don't fail on old configs */
1163                 GOTO(out, err = 0);
1164         }
1165         case LCFG_MARKER: {
1166                 struct cfg_marker *marker;
1167                 marker = lustre_cfg_buf(lcfg, 1);
1168                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
1169                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
1170                 GOTO(out, err = 0);
1171         }
1172         case LCFG_PARAM: {
1173                 char *tmp;
1174                 /* llite has no obd */
1175                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
1176                                        PARAM_LLITE, 0) == 0) &&
1177                     client_process_config) {
1178                         err = (*client_process_config)(lcfg);
1179                         GOTO(out, err);
1180                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1181                                               PARAM_SYS, &tmp) == 0)) {
1182                         /* Global param settings */
1183                         err = class_set_global(tmp, lcfg->lcfg_num, lcfg);
1184                         /*
1185                          * Client or server should not fail to mount if
1186                          * it hits an unknown configuration parameter.
1187                          */
1188                         if (err != 0)
1189                                 CWARN("Ignoring unknown param %s\n", tmp);
1190
1191                         GOTO(out, err = 0);
1192                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1193                                               PARAM_QUOTA, &tmp) == 0) &&
1194                            quota_process_config) {
1195                         err = (*quota_process_config)(lcfg);
1196                         GOTO(out, err);
1197                 }
1198
1199                 break;
1200         }
1201         case LCFG_SET_PARAM: {
1202                 err = process_param2_config(lcfg);
1203                 GOTO(out, err = 0);
1204         }
1205         }
1206         /* Commands that require a device */
1207         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1208         if (obd == NULL) {
1209                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
1210                         CERROR("this lcfg command requires a device name\n");
1211                 else
1212                         CERROR("no device for: %s\n",
1213                                lustre_cfg_string(lcfg, 0));
1214
1215                 GOTO(out, err = -EINVAL);
1216         }
1217
1218         switch(lcfg->lcfg_command) {
1219         case LCFG_SETUP: {
1220                 err = class_setup(obd, lcfg);
1221                 GOTO(out, err);
1222         }
1223         case LCFG_DETACH: {
1224                 err = class_detach(obd, lcfg);
1225                 GOTO(out, err = 0);
1226         }
1227         case LCFG_CLEANUP: {
1228                 err = class_cleanup(obd, lcfg);
1229                 GOTO(out, err = 0);
1230         }
1231         case LCFG_ADD_CONN: {
1232                 err = class_add_conn(obd, lcfg);
1233                 GOTO(out, err = 0);
1234         }
1235         case LCFG_DEL_CONN: {
1236                 err = class_del_conn(obd, lcfg);
1237                 GOTO(out, err = 0);
1238         }
1239         case LCFG_POOL_NEW: {
1240                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
1241                 GOTO(out, err = 0);
1242         }
1243         case LCFG_POOL_ADD: {
1244                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1245                                    lustre_cfg_string(lcfg, 3));
1246                 GOTO(out, err = 0);
1247         }
1248         case LCFG_POOL_REM: {
1249                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1250                                    lustre_cfg_string(lcfg, 3));
1251                 GOTO(out, err = 0);
1252         }
1253         case LCFG_POOL_DEL: {
1254                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
1255                 GOTO(out, err = 0);
1256         }
1257         default: {
1258                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
1259                 GOTO(out, err);
1260
1261         }
1262         }
1263 out:
1264         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
1265                 CWARN("Ignoring error %d on optional command %#x\n", err,
1266                       lcfg->lcfg_command);
1267                 err = 0;
1268         }
1269         return err;
1270 }
1271 EXPORT_SYMBOL(class_process_config);
1272
1273 #ifndef HAVE_ONLY_PROCFS_SEQ
1274 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
1275                              struct lustre_cfg *lcfg, void *data)
1276 {
1277 #ifdef __KERNEL__
1278         struct lprocfs_vars *var;
1279         char *key, *sval;
1280         int i, keylen, vallen;
1281         int matched = 0, j = 0;
1282         int rc = 0;
1283         int skip = 0;
1284         ENTRY;
1285
1286         if (lcfg->lcfg_command != LCFG_PARAM) {
1287                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1288                 RETURN(-EINVAL);
1289         }
1290
1291         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1292            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1293            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1294         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1295                 key = lustre_cfg_buf(lcfg, i);
1296                 /* Strip off prefix */
1297                 if (class_match_param(key, prefix, &key))
1298                         /* If the prefix doesn't match, return error so we
1299                          * can pass it down the stack */
1300                         RETURN(-ENOSYS);
1301                 sval = strchr(key, '=');
1302                 if (!sval || (*(sval + 1) == 0)) {
1303                         CERROR("Can't parse param %s (missing '=')\n", key);
1304                         /* rc = -EINVAL;        continue parsing other params */
1305                         continue;
1306                 }
1307                 keylen = sval - key;
1308                 sval++;
1309                 vallen = strlen(sval);
1310                 matched = 0;
1311                 j = 0;
1312                 /* Search proc entries */
1313                 while (lvars[j].name) {
1314                         var = &lvars[j];
1315                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1316                             keylen == strlen(var->name)) {
1317                                 matched++;
1318                                 rc = -EROFS;
1319
1320                                 if (var->write_fptr) {
1321                                         mm_segment_t oldfs;
1322                                         oldfs = get_fs();
1323                                         set_fs(KERNEL_DS);
1324                                         rc = (var->write_fptr)(NULL, sval,
1325                                                                 vallen, data);
1326                                         set_fs(oldfs);
1327                                 }
1328                                 break;
1329                         }
1330                         j++;
1331                 }
1332                 if (!matched) {
1333                         CERROR("%.*s: %s unknown param %s\n",
1334                                (int)strlen(prefix) - 1, prefix,
1335                                (char *)lustre_cfg_string(lcfg, 0), key);
1336                         /* rc = -EINVAL;        continue parsing other params */
1337                         skip++;
1338                 } else if (rc < 0) {
1339                         CERROR("%s: error writing proc entry '%s': rc = %d\n",
1340                                prefix, var->name, rc);
1341                         rc = 0;
1342                 } else {
1343                         CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1344                                          lustre_cfg_string(lcfg, 0),
1345                                          (int)strlen(prefix) - 1, prefix,
1346                                          (int)(sval - key - 1), key, sval);
1347                 }
1348         }
1349
1350         if (rc > 0)
1351                 rc = 0;
1352         if (!rc && skip)
1353                 rc = skip;
1354         RETURN(rc);
1355 #else
1356         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1357         /* Don't throw config error */
1358         RETURN(0);
1359 #endif
1360 }
1361 EXPORT_SYMBOL(class_process_proc_param);
1362 #endif
1363
1364 int class_process_proc_seq_param(char *prefix, struct lprocfs_seq_vars *lvars,
1365                                  struct lustre_cfg *lcfg, void *data)
1366 {
1367 #ifdef __KERNEL__
1368         struct lprocfs_seq_vars *var;
1369         struct file fakefile;
1370         struct seq_file fake_seqfile;
1371         char *key, *sval;
1372         int i, keylen, vallen;
1373         int matched = 0, j = 0;
1374         int rc = 0;
1375         int skip = 0;
1376         ENTRY;
1377
1378         if (lcfg->lcfg_command != LCFG_PARAM) {
1379                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1380                 RETURN(-EINVAL);
1381         }
1382
1383         /* fake a seq file so that var->fops->write can work... */
1384         fakefile.private_data = &fake_seqfile;
1385         fake_seqfile.private = data;
1386         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1387            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1388            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1389         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1390                 key = lustre_cfg_buf(lcfg, i);
1391                 /* Strip off prefix */
1392                 if (class_match_param(key, prefix, &key))
1393                         /* If the prefix doesn't match, return error so we
1394                          * can pass it down the stack */
1395                         RETURN(-ENOSYS);
1396                 sval = strchr(key, '=');
1397                 if (!sval || (*(sval + 1) == 0)) {
1398                         CERROR("Can't parse param %s (missing '=')\n", key);
1399                         /* rc = -EINVAL;        continue parsing other params */
1400                         continue;
1401                 }
1402                 keylen = sval - key;
1403                 sval++;
1404                 vallen = strlen(sval);
1405                 matched = 0;
1406                 j = 0;
1407                 /* Search proc entries */
1408                 while (lvars[j].name) {
1409                         var = &lvars[j];
1410                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1411                             keylen == strlen(var->name)) {
1412                                 matched++;
1413                                 rc = -EROFS;
1414
1415                                 if (var->fops && var->fops->write) {
1416                                         mm_segment_t oldfs;
1417                                         oldfs = get_fs();
1418                                         set_fs(KERNEL_DS);
1419                                         rc = (var->fops->write)(&fakefile, sval,
1420                                                                 vallen, NULL);
1421                                         set_fs(oldfs);
1422                                 }
1423                                 break;
1424                         }
1425                         j++;
1426                 }
1427                 if (!matched) {
1428                         CERROR("%.*s: %s unknown param %s\n",
1429                                (int)strlen(prefix) - 1, prefix,
1430                                (char *)lustre_cfg_string(lcfg, 0), key);
1431                         /* rc = -EINVAL;        continue parsing other params */
1432                         skip++;
1433                 } else if (rc < 0) {
1434                         CERROR("%s: error writing proc entry '%s': rc = %d\n",
1435                                prefix, var->name, rc);
1436                         rc = 0;
1437                 } else {
1438                         CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1439                                          lustre_cfg_string(lcfg, 0),
1440                                          (int)strlen(prefix) - 1, prefix,
1441                                          (int)(sval - key - 1), key, sval);
1442                 }
1443         }
1444
1445         if (rc > 0)
1446                 rc = 0;
1447         if (!rc && skip)
1448                 rc = skip;
1449         RETURN(rc);
1450 #else
1451         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1452         /* Don't throw config error */
1453         RETURN(0);
1454 #endif
1455 }
1456 EXPORT_SYMBOL(class_process_proc_seq_param);
1457
1458 #ifdef __KERNEL__
1459 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1460 #else
1461 #define lustre_check_exclusion(a,b)  0
1462 #endif
1463
1464 /*
1465  * Supplemental functions for config logs, it allocates lustre_cfg
1466  * buffers plus initialized llog record header at the beginning.
1467  */
1468 struct llog_cfg_rec *lustre_cfg_rec_new(int cmd, struct lustre_cfg_bufs *bufs)
1469 {
1470         struct llog_cfg_rec     *lcr;
1471         int                      reclen;
1472
1473         ENTRY;
1474
1475         reclen = lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen);
1476         reclen = llog_data_len(reclen) + sizeof(struct llog_rec_hdr) +
1477                  sizeof(struct llog_rec_tail);
1478
1479         OBD_ALLOC(lcr, reclen);
1480         if (lcr == NULL)
1481                 RETURN(NULL);
1482
1483         lustre_cfg_init(&lcr->lcr_cfg, cmd, bufs);
1484
1485         lcr->lcr_hdr.lrh_len = reclen;
1486         lcr->lcr_hdr.lrh_type = OBD_CFG_REC;
1487
1488         RETURN(lcr);
1489 }
1490 EXPORT_SYMBOL(lustre_cfg_rec_new);
1491
1492 void lustre_cfg_rec_free(struct llog_cfg_rec *lcr)
1493 {
1494         ENTRY;
1495         OBD_FREE(lcr, lcr->lcr_hdr.lrh_len);
1496         EXIT;
1497 }
1498 EXPORT_SYMBOL(lustre_cfg_rec_free);
1499
1500 /** Parse a configuration llog, doing various manipulations on them
1501  * for various reasons, (modifications for compatibility, skip obsolete
1502  * records, change uuids, etc), then class_process_config() resulting
1503  * net records.
1504  */
1505 int class_config_llog_handler(const struct lu_env *env,
1506                               struct llog_handle *handle,
1507                               struct llog_rec_hdr *rec, void *data)
1508 {
1509         struct config_llog_instance *clli = data;
1510         int cfg_len = rec->lrh_len;
1511         char *cfg_buf = (char*) (rec + 1);
1512         int rc = 0;
1513         ENTRY;
1514
1515         //class_config_dump_handler(handle, rec, data);
1516
1517         switch (rec->lrh_type) {
1518         case OBD_CFG_REC: {
1519                 struct lustre_cfg *lcfg, *lcfg_new;
1520                 struct lustre_cfg_bufs bufs;
1521                 char *inst_name = NULL;
1522                 int inst_len = 0;
1523                 int inst = 0, swab = 0;
1524
1525                 lcfg = (struct lustre_cfg *)cfg_buf;
1526                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1527                         lustre_swab_lustre_cfg(lcfg);
1528                         swab = 1;
1529                 }
1530
1531                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1532                 if (rc)
1533                         GOTO(out, rc);
1534
1535                 /* Figure out config state info */
1536                 if (lcfg->lcfg_command == LCFG_MARKER) {
1537                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1538                         lustre_swab_cfg_marker(marker, swab,
1539                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1540                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1541                                clli->cfg_flags, marker->cm_flags);
1542                         if (marker->cm_flags & CM_START) {
1543                                 /* all previous flags off */
1544                                 clli->cfg_flags = CFG_F_MARKER;
1545                                 server_name2index(marker->cm_tgtname,
1546                                                   &clli->cfg_lwp_idx, NULL);
1547                                 if (marker->cm_flags & CM_SKIP) {
1548                                         clli->cfg_flags |= CFG_F_SKIP;
1549                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1550                                                marker->cm_step);
1551                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1552                                            (clli->cfg_sb &&
1553                                             lustre_check_exclusion(clli->cfg_sb,
1554                                                          marker->cm_tgtname))) {
1555                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1556                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1557                                                marker->cm_step);
1558                                 }
1559                         } else if (marker->cm_flags & CM_END) {
1560                                 clli->cfg_flags = 0;
1561                         }
1562                 }
1563                 /* A config command without a start marker before it is
1564                    illegal (post 146) */
1565                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1566                     !(clli->cfg_flags & CFG_F_MARKER) &&
1567                     (lcfg->lcfg_command != LCFG_MARKER)) {
1568                         CWARN("Config not inside markers, ignoring! "
1569                               "(inst: %p, uuid: %s, flags: %#x)\n",
1570                               clli->cfg_instance,
1571                               clli->cfg_uuid.uuid, clli->cfg_flags);
1572                         clli->cfg_flags |= CFG_F_SKIP;
1573                 }
1574                 if (clli->cfg_flags & CFG_F_SKIP) {
1575                         CDEBUG(D_CONFIG, "skipping %#x\n",
1576                                clli->cfg_flags);
1577                         rc = 0;
1578                         /* No processing! */
1579                         break;
1580                 }
1581
1582                 /*
1583                  * For interoperability between 1.8 and 2.0,
1584                  * rename "mds" obd device type to "mdt".
1585                  */
1586                 {
1587                         char *typename = lustre_cfg_string(lcfg, 1);
1588                         char *index = lustre_cfg_string(lcfg, 2);
1589
1590                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1591                              strcmp(typename, "mds") == 0)) {
1592                                 CWARN("For 1.8 interoperability, rename obd "
1593                                        "type from mds to mdt\n");
1594                                 typename[2] = 't';
1595                         }
1596                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1597                              strcmp(index, "type") == 0)) {
1598                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1599                                        "set this index to '0'\n");
1600                                 index[0] = '0';
1601                                 index[1] = 0;
1602                         }
1603                 }
1604
1605 #if defined(HAVE_SERVER_SUPPORT) && defined(__KERNEL__)
1606                 /* newer MDS replaces LOV/OSC with LOD/OSP */
1607                 {
1608                         char *typename = lustre_cfg_string(lcfg, 1);
1609
1610                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1611                             strcmp(typename, LUSTRE_LOV_NAME) == 0) &&
1612                             IS_MDT(s2lsi(clli->cfg_sb))) {
1613                                 CDEBUG(D_CONFIG,
1614                                        "For 2.x interoperability, rename obd "
1615                                        "type from lov to lod (%s)\n",
1616                                        s2lsi(clli->cfg_sb)->lsi_svname);
1617                                 strcpy(typename, LUSTRE_LOD_NAME);
1618                         }
1619                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1620                             strcmp(typename, LUSTRE_OSC_NAME) == 0) &&
1621                             IS_MDT(s2lsi(clli->cfg_sb))) {
1622                                 CDEBUG(D_CONFIG,
1623                                        "For 2.x interoperability, rename obd "
1624                                        "type from osc to osp (%s)\n",
1625                                        s2lsi(clli->cfg_sb)->lsi_svname);
1626                                 strcpy(typename, LUSTRE_OSP_NAME);
1627                         }
1628                 }
1629 #endif
1630
1631                 if (clli->cfg_flags & CFG_F_EXCLUDE) {
1632                         CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
1633                                lcfg->lcfg_command);
1634                         if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
1635                                 /* Add inactive instead */
1636                                 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1637                 }
1638
1639                 lustre_cfg_bufs_init(&bufs, lcfg);
1640
1641                 if (clli && clli->cfg_instance &&
1642                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1643                         inst = 1;
1644                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1645                                    sizeof(clli->cfg_instance) * 2 + 4;
1646                         OBD_ALLOC(inst_name, inst_len);
1647                         if (inst_name == NULL)
1648                                 GOTO(out, rc = -ENOMEM);
1649                         sprintf(inst_name, "%s-%p",
1650                                 lustre_cfg_string(lcfg, 0),
1651                                 clli->cfg_instance);
1652                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1653                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1654                                lcfg->lcfg_command, inst_name);
1655                 }
1656
1657                 /* we override the llog's uuid for clients, to insure they
1658                 are unique */
1659                 if (clli && clli->cfg_instance != NULL &&
1660                     lcfg->lcfg_command == LCFG_ATTACH) {
1661                         lustre_cfg_bufs_set_string(&bufs, 2,
1662                                                    clli->cfg_uuid.uuid);
1663                 }
1664                 /*
1665                  * sptlrpc config record, we expect 2 data segments:
1666                  *  [0]: fs_name/target_name,
1667                  *  [1]: rule string
1668                  * moving them to index [1] and [2], and insert MGC's
1669                  * obdname at index [0].
1670                  */
1671                 if (clli && clli->cfg_instance == NULL &&
1672                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1673                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1674                                             bufs.lcfg_buflen[1]);
1675                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1676                                             bufs.lcfg_buflen[0]);
1677                         lustre_cfg_bufs_set_string(&bufs, 0,
1678                                                    clli->cfg_obdname);
1679                 }
1680
1681                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1682                 if (lcfg_new == NULL)
1683                         GOTO(out, rc = -ENOMEM);
1684
1685                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1686                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1687
1688                 /* XXX Hack to try to remain binary compatible with
1689                  * pre-newconfig logs */
1690                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1691                     (lcfg->lcfg_nid >> 32) == 0) {
1692                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1693
1694                         lcfg_new->lcfg_nid =
1695                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1696                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1697                               lcfg->lcfg_nal, addr,
1698                               libcfs_nid2str(lcfg_new->lcfg_nid));
1699                 } else {
1700                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1701                 }
1702
1703                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1704
1705                 rc = class_process_config(lcfg_new);
1706                 lustre_cfg_free(lcfg_new);
1707
1708                 if (inst)
1709                         OBD_FREE(inst_name, inst_len);
1710                 break;
1711         }
1712         default:
1713                 CERROR("Unknown llog record type %#x encountered\n",
1714                        rec->lrh_type);
1715                 break;
1716         }
1717 out:
1718         if (rc) {
1719                 CERROR("%s: cfg command failed: rc = %d\n",
1720                        handle->lgh_ctxt->loc_obd->obd_name, rc);
1721                 class_config_dump_handler(NULL, handle, rec, data);
1722         }
1723         RETURN(rc);
1724 }
1725 EXPORT_SYMBOL(class_config_llog_handler);
1726
1727 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1728                             char *name, struct config_llog_instance *cfg)
1729 {
1730         struct llog_process_cat_data     cd = {0, 0};
1731         struct llog_handle              *llh;
1732         llog_cb_t                        callback;
1733         int                              rc;
1734         ENTRY;
1735
1736         CDEBUG(D_INFO, "looking up llog %s\n", name);
1737         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1738         if (rc)
1739                 RETURN(rc);
1740
1741         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1742         if (rc)
1743                 GOTO(parse_out, rc);
1744
1745         /* continue processing from where we last stopped to end-of-log */
1746         if (cfg) {
1747                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1748                 callback = cfg->cfg_callback;
1749                 LASSERT(callback != NULL);
1750         } else {
1751                 callback = class_config_llog_handler;
1752         }
1753
1754         cd.lpcd_last_idx = 0;
1755
1756         rc = llog_process(env, llh, callback, cfg, &cd);
1757
1758         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1759                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1760         if (cfg)
1761                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1762
1763 parse_out:
1764         llog_close(env, llh);
1765         RETURN(rc);
1766 }
1767 EXPORT_SYMBOL(class_config_parse_llog);
1768
1769 struct lcfg_type_data {
1770         __u32    ltd_type;
1771         char    *ltd_name;
1772         char    *ltd_bufs[4];
1773 } lcfg_data_table[] = {
1774         { LCFG_ATTACH, "attach", { "type", "UUID", "3", "4" } },
1775         { LCFG_DETACH, "detach", { "1", "2", "3", "4" } },
1776         { LCFG_SETUP, "setup", { "UUID", "node", "options", "failout" } },
1777         { LCFG_CLEANUP, "cleanup", { "1", "2", "3", "4" } },
1778         { LCFG_ADD_UUID, "add_uuid", { "node", "2", "3", "4" }  },
1779         { LCFG_DEL_UUID, "del_uuid", { "1", "2", "3", "4" }  },
1780         { LCFG_MOUNTOPT, "new_profile", { "name", "lov", "lmv", "4" }  },
1781         { LCFG_DEL_MOUNTOPT, "del_mountopt", { "1", "2", "3", "4" } , },
1782         { LCFG_SET_TIMEOUT, "set_timeout", { "parameter", "2", "3", "4" }  },
1783         { LCFG_SET_UPCALL, "set_upcall", { "1", "2", "3", "4" }  },
1784         { LCFG_ADD_CONN, "add_conn", { "node", "2", "3", "4" }  },
1785         { LCFG_DEL_CONN, "del_conn", { "1", "2", "3", "4" }  },
1786         { LCFG_LOV_ADD_OBD, "add_osc", { "ost", "index", "gen", "UUID" } },
1787         { LCFG_LOV_DEL_OBD, "del_osc", { "1", "2", "3", "4" } },
1788         { LCFG_PARAM, "set_param", { "parameter", "value", "3", "4" } },
1789         { LCFG_MARKER, "marker", { "1", "2", "3", "4" } },
1790         { LCFG_LOG_START, "log_start", { "1", "2", "3", "4" } },
1791         { LCFG_LOG_END, "log_end", { "1", "2", "3", "4" } },
1792         { LCFG_LOV_ADD_INA, "add_osc_inactive", { "1", "2", "3", "4" }  },
1793         { LCFG_ADD_MDC, "add_mdc", { "mdt", "index", "gen", "UUID" } },
1794         { LCFG_DEL_MDC, "del_mdc", { "1", "2", "3", "4" } },
1795         { LCFG_SPTLRPC_CONF, "security", { "parameter", "2", "3", "4" } },
1796         { LCFG_POOL_NEW, "new_pool", { "fsname", "pool", "3", "4" }  },
1797         { LCFG_POOL_ADD, "add_pool", { "fsname", "pool", "ost", "4" } },
1798         { LCFG_POOL_REM, "remove_pool", { "fsname", "pool", "ost", "4" } },
1799         { LCFG_POOL_DEL, "del_pool", { "fsname", "pool", "3", "4" } },
1800         { LCFG_SET_LDLM_TIMEOUT, "set_ldlm_timeout",
1801           { "parameter", "2", "3", "4" } },
1802         { 0, NULL, { NULL, NULL, NULL, NULL } }
1803 };
1804
1805 static struct lcfg_type_data *lcfg_cmd2data(__u32 cmd)
1806 {
1807         int i = 0;
1808
1809         while (lcfg_data_table[i].ltd_type != 0) {
1810                 if (lcfg_data_table[i].ltd_type == cmd)
1811                         return &lcfg_data_table[i];
1812                 i++;
1813         }
1814         return NULL;
1815 }
1816
1817 /**
1818  * parse config record and output dump in supplied buffer.
1819  * This is separated from class_config_dump_handler() to use
1820  * for ioctl needs as well
1821  *
1822  * Sample Output:
1823  * - { event: attach, device: lustrewt-clilov, type: lov, UUID:
1824  *     lustrewt-clilov_UUID }
1825  */
1826 int class_config_yaml_output(struct llog_rec_hdr *rec, char *buf, int size)
1827 {
1828         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1829         char                    *ptr = buf;
1830         char                    *end = buf + size;
1831         int                      rc = 0, i;
1832         struct lcfg_type_data   *ldata;
1833
1834         LASSERT(rec->lrh_type == OBD_CFG_REC);
1835         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1836         if (rc < 0)
1837                 return rc;
1838
1839         ldata = lcfg_cmd2data(lcfg->lcfg_command);
1840         if (ldata == NULL)
1841                 return -ENOTTY;
1842
1843         if (lcfg->lcfg_command == LCFG_MARKER)
1844                 return 0;
1845
1846         /* form YAML entity */
1847         ptr += snprintf(ptr, end - ptr, "- { event: %s", ldata->ltd_name);
1848
1849         if (lcfg->lcfg_flags)
1850                 ptr += snprintf(ptr, end - ptr, ", flags: %#08x",
1851                                 lcfg->lcfg_flags);
1852         if (lcfg->lcfg_num)
1853                 ptr += snprintf(ptr, end - ptr, ", num: %#08x",
1854                                 lcfg->lcfg_num);
1855         if (lcfg->lcfg_nid)
1856                 ptr += snprintf(ptr, end - ptr, ", nid: %s("LPX64")",
1857                                 libcfs_nid2str(lcfg->lcfg_nid),
1858                                 lcfg->lcfg_nid);
1859
1860         if (LUSTRE_CFG_BUFLEN(lcfg, 0) > 0)
1861                 ptr += snprintf(ptr, end - ptr, ", device: %s",
1862                                 lustre_cfg_string(lcfg, 0));
1863
1864         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1865                 if (LUSTRE_CFG_BUFLEN(lcfg, i) > 0)
1866                         ptr += snprintf(ptr, end - ptr, ", %s: %s",
1867                                         ldata->ltd_bufs[i - 1],
1868                                         lustre_cfg_string(lcfg, i));
1869         }
1870
1871         ptr += snprintf(ptr, end - ptr, " }\n");
1872         /* return consumed bytes */
1873         rc = ptr - buf;
1874         return rc;
1875 }
1876
1877 /**
1878  * parse config record and output dump in supplied buffer.
1879  * This is separated from class_config_dump_handler() to use
1880  * for ioctl needs as well
1881  */
1882 int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
1883 {
1884         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1885         char                    *ptr = buf;
1886         char                    *end = buf + size;
1887         int                      rc = 0;
1888
1889         ENTRY;
1890
1891         LASSERT(rec->lrh_type == OBD_CFG_REC);
1892         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1893         if (rc < 0)
1894                 RETURN(rc);
1895
1896         ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
1897         if (lcfg->lcfg_flags)
1898                 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1899                                 lcfg->lcfg_flags);
1900
1901         if (lcfg->lcfg_num)
1902                 ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
1903
1904         if (lcfg->lcfg_nid)
1905                 ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1906                                 libcfs_nid2str(lcfg->lcfg_nid),
1907                                 lcfg->lcfg_nid);
1908
1909         if (lcfg->lcfg_command == LCFG_MARKER) {
1910                 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1911
1912                 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1913                                 marker->cm_step, marker->cm_flags,
1914                                 marker->cm_tgtname, marker->cm_comment);
1915         } else {
1916                 int i;
1917
1918                 for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1919                         ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1920                                         lustre_cfg_string(lcfg, i));
1921                 }
1922         }
1923         ptr += snprintf(ptr, end - ptr, "\n");
1924         /* return consumed bytes */
1925         rc = ptr - buf;
1926         RETURN(rc);
1927 }
1928
1929 int class_config_dump_handler(const struct lu_env *env,
1930                               struct llog_handle *handle,
1931                               struct llog_rec_hdr *rec, void *data)
1932 {
1933         char    *outstr;
1934         int      rc = 0;
1935
1936         ENTRY;
1937
1938         OBD_ALLOC(outstr, 256);
1939         if (outstr == NULL)
1940                 RETURN(-ENOMEM);
1941
1942         if (rec->lrh_type == OBD_CFG_REC) {
1943                 class_config_parse_rec(rec, outstr, 256);
1944                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1945         } else {
1946                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1947                 rc = -EINVAL;
1948         }
1949
1950         OBD_FREE(outstr, 256);
1951         RETURN(rc);
1952 }
1953
1954 int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1955                            char *name, struct config_llog_instance *cfg)
1956 {
1957         struct llog_handle      *llh;
1958         int                      rc;
1959
1960         ENTRY;
1961
1962         LCONSOLE_INFO("Dumping config log %s\n", name);
1963
1964         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1965         if (rc)
1966                 RETURN(rc);
1967
1968         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1969         if (rc)
1970                 GOTO(parse_out, rc);
1971
1972         rc = llog_process(env, llh, class_config_dump_handler, cfg, NULL);
1973 parse_out:
1974         llog_close(env, llh);
1975
1976         LCONSOLE_INFO("End config log %s\n", name);
1977         RETURN(rc);
1978 }
1979 EXPORT_SYMBOL(class_config_dump_llog);
1980
1981 /** Call class_cleanup and class_detach.
1982  * "Manual" only in the sense that we're faking lcfg commands.
1983  */
1984 int class_manual_cleanup(struct obd_device *obd)
1985 {
1986         char                    flags[3] = "";
1987         struct lustre_cfg      *lcfg;
1988         struct lustre_cfg_bufs  bufs;
1989         int                     rc;
1990         ENTRY;
1991
1992         if (!obd) {
1993                 CERROR("empty cleanup\n");
1994                 RETURN(-EALREADY);
1995         }
1996
1997         if (obd->obd_force)
1998                 strcat(flags, "F");
1999         if (obd->obd_fail)
2000                 strcat(flags, "A");
2001
2002         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
2003                obd->obd_name, flags);
2004
2005         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
2006         lustre_cfg_bufs_set_string(&bufs, 1, flags);
2007         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
2008         if (!lcfg)
2009                 RETURN(-ENOMEM);
2010
2011         rc = class_process_config(lcfg);
2012         if (rc) {
2013                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
2014                 GOTO(out, rc);
2015         }
2016
2017         /* the lcfg is almost the same for both ops */
2018         lcfg->lcfg_command = LCFG_DETACH;
2019         rc = class_process_config(lcfg);
2020         if (rc)
2021                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
2022 out:
2023         lustre_cfg_free(lcfg);
2024         RETURN(rc);
2025 }
2026 EXPORT_SYMBOL(class_manual_cleanup);
2027
2028 /*
2029  * uuid<->export lustre hash operations
2030  */
2031
2032 static unsigned
2033 uuid_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2034 {
2035         return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
2036                                   sizeof(((struct obd_uuid *)key)->uuid), mask);
2037 }
2038
2039 static void *
2040 uuid_key(cfs_hlist_node_t *hnode)
2041 {
2042         struct obd_export *exp;
2043
2044         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2045
2046         return &exp->exp_client_uuid;
2047 }
2048
2049 /*
2050  * NOTE: It is impossible to find an export that is in failed
2051  *       state with this function
2052  */
2053 static int
2054 uuid_keycmp(const void *key, cfs_hlist_node_t *hnode)
2055 {
2056         struct obd_export *exp;
2057
2058         LASSERT(key);
2059         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2060
2061         return obd_uuid_equals(key, &exp->exp_client_uuid) &&
2062                !exp->exp_failed;
2063 }
2064
2065 static void *
2066 uuid_export_object(cfs_hlist_node_t *hnode)
2067 {
2068         return cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2069 }
2070
2071 static void
2072 uuid_export_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2073 {
2074         struct obd_export *exp;
2075
2076         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2077         class_export_get(exp);
2078 }
2079
2080 static void
2081 uuid_export_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2082 {
2083         struct obd_export *exp;
2084
2085         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2086         class_export_put(exp);
2087 }
2088
2089 static cfs_hash_ops_t uuid_hash_ops = {
2090         .hs_hash        = uuid_hash,
2091         .hs_key         = uuid_key,
2092         .hs_keycmp      = uuid_keycmp,
2093         .hs_object      = uuid_export_object,
2094         .hs_get         = uuid_export_get,
2095         .hs_put_locked  = uuid_export_put_locked,
2096 };
2097
2098
2099 /*
2100  * nid<->export hash operations
2101  */
2102
2103 static unsigned
2104 nid_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2105 {
2106         return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
2107 }
2108
2109 static void *
2110 nid_key(cfs_hlist_node_t *hnode)
2111 {
2112         struct obd_export *exp;
2113
2114         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2115
2116         RETURN(&exp->exp_connection->c_peer.nid);
2117 }
2118
2119 /*
2120  * NOTE: It is impossible to find an export that is in failed
2121  *       state with this function
2122  */
2123 static int
2124 nid_kepcmp(const void *key, cfs_hlist_node_t *hnode)
2125 {
2126         struct obd_export *exp;
2127
2128         LASSERT(key);
2129         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2130
2131         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
2132                !exp->exp_failed);
2133 }
2134
2135 static void *
2136 nid_export_object(cfs_hlist_node_t *hnode)
2137 {
2138         return cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2139 }
2140
2141 static void
2142 nid_export_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2143 {
2144         struct obd_export *exp;
2145
2146         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2147         class_export_get(exp);
2148 }
2149
2150 static void
2151 nid_export_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2152 {
2153         struct obd_export *exp;
2154
2155         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2156         class_export_put(exp);
2157 }
2158
2159 static cfs_hash_ops_t nid_hash_ops = {
2160         .hs_hash        = nid_hash,
2161         .hs_key         = nid_key,
2162         .hs_keycmp      = nid_kepcmp,
2163         .hs_object      = nid_export_object,
2164         .hs_get         = nid_export_get,
2165         .hs_put_locked  = nid_export_put_locked,
2166 };
2167
2168
2169 /*
2170  * nid<->nidstats hash operations
2171  */
2172
2173 static void *
2174 nidstats_key(cfs_hlist_node_t *hnode)
2175 {
2176         struct nid_stat *ns;
2177
2178         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
2179
2180         return &ns->nid;
2181 }
2182
2183 static int
2184 nidstats_keycmp(const void *key, cfs_hlist_node_t *hnode)
2185 {
2186         return *(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key;
2187 }
2188
2189 static void *
2190 nidstats_object(cfs_hlist_node_t *hnode)
2191 {
2192         return cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
2193 }
2194
2195 static void
2196 nidstats_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2197 {
2198         struct nid_stat *ns;
2199
2200         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
2201         nidstat_getref(ns);
2202 }
2203
2204 static void
2205 nidstats_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2206 {
2207         struct nid_stat *ns;
2208
2209         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
2210         nidstat_putref(ns);
2211 }
2212
2213 static cfs_hash_ops_t nid_stat_hash_ops = {
2214         .hs_hash        = nid_hash,
2215         .hs_key         = nidstats_key,
2216         .hs_keycmp      = nidstats_keycmp,
2217         .hs_object      = nidstats_object,
2218         .hs_get         = nidstats_get,
2219         .hs_put_locked  = nidstats_put_locked,
2220 };