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         INIT_LIST_HEAD(&obd->obd_exports);
 392         INIT_LIST_HEAD(&obd->obd_unlinked_exports);
 393         INIT_LIST_HEAD(&obd->obd_delayed_exports);
 394         INIT_LIST_HEAD(&obd->obd_exports_timed);
 395         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         INIT_LIST_HEAD(&obd->obd_req_replay_queue);
 412         INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
 413         INIT_LIST_HEAD(&obd->obd_final_req_queue);
 414         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         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         spin_unlock(&obd->obd_dev_lock);
 628
 629         /* wait for already-arrived-connections to finish. */
 630         while (obd->obd_conn_inprogress > 0)
 631                 yield();
 632         smp_rmb();
 633
 634         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 635                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 636                         switch (*flag) {
 637                         case 'F':
 638                                 obd->obd_force = 1;
 639                                 break;
 640                         case 'A':
 641                                 LCONSOLE_WARN("Failing over %s\n",
 642                                               obd->obd_name);
 643                                 obd->obd_fail = 1;
 644                                 obd->obd_no_transno = 1;
 645                                 obd->obd_no_recov = 1;
 646                                 if (OBP(obd, iocontrol)) {
 647                                         obd_iocontrol(OBD_IOC_SYNC,
 648                                                       obd->obd_self_export,
 649                                                       0, NULL, NULL);
 650                                 }
 651                                 break;
 652                         default:
 653                                 CERROR("Unrecognised flag '%c'\n", *flag);
 654                         }
 655         }
 656
 657         LASSERT(obd->obd_self_export);
 658
 659         /* The three references that should be remaining are the
 660          * obd_self_export and the attach and setup references. */
 661         if (atomic_read(&obd->obd_refcount) > 3) {
 662                 /* refcounf - 3 might be the number of real exports
 663                    (excluding self export). But class_incref is called
 664                    by other things as well, so don't count on it. */
 665                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 666                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 667                 dump_exports(obd, 0);
 668                 class_disconnect_exports(obd);
 669         }
 670
 671         /* Precleanup, we must make sure all exports get destroyed. */
 672         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 673         if (err)
 674                 CERROR("Precleanup %s returned %d\n",
 675                        obd->obd_name, err);
 676
 677         /* destroy an uuid-export hash body */
 678         if (obd->obd_uuid_hash) {
 679                 cfs_hash_putref(obd->obd_uuid_hash);
 680                 obd->obd_uuid_hash = NULL;
 681         }
 682
 683         /* destroy a nid-export hash body */
 684         if (obd->obd_nid_hash) {
 685                 cfs_hash_putref(obd->obd_nid_hash);
 686                 obd->obd_nid_hash = NULL;
 687         }
 688
 689         /* destroy a nid-stats hash body */
 690         if (obd->obd_nid_stats_hash) {
 691                 cfs_hash_putref(obd->obd_nid_stats_hash);
 692                 obd->obd_nid_stats_hash = NULL;
 693         }
 694
 695         class_decref(obd, "setup", obd);
 696         obd->obd_set_up = 0;
 697
 698         RETURN(0);
 699 }
 700 EXPORT_SYMBOL(class_cleanup);
 701
 702 struct obd_device *class_incref(struct obd_device *obd,
 703                                 const char *scope, const void *source)
 704 {
 705         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 706         atomic_inc(&obd->obd_refcount);
 707         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 708                atomic_read(&obd->obd_refcount));
 709
 710         return obd;
 711 }
 712 EXPORT_SYMBOL(class_incref);
 713
 714 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 715 {
 716         int err;
 717         int refs;
 718
 719         spin_lock(&obd->obd_dev_lock);
 720         atomic_dec(&obd->obd_refcount);
 721         refs = atomic_read(&obd->obd_refcount);
 722         spin_unlock(&obd->obd_dev_lock);
 723         lu_ref_del(&obd->obd_reference, scope, source);
 724
 725         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 726
 727         if ((refs == 1) && obd->obd_stopping) {
 728                 /* All exports have been destroyed; there should
 729                    be no more in-progress ops by this point.*/
 730
 731                 spin_lock(&obd->obd_self_export->exp_lock);
 732                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
 733                 spin_unlock(&obd->obd_self_export->exp_lock);
 734
 735                 /* note that we'll recurse into class_decref again */
 736                 class_unlink_export(obd->obd_self_export);
 737                 return;
 738         }
 739
 740         if (refs == 0) {
 741                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 742                        obd->obd_name, obd->obd_uuid.uuid);
 743                 LASSERT(!obd->obd_attached);
 744                 if (obd->obd_stopping) {
 745                         /* If we're not stopping, we were never set up */
 746                         err = obd_cleanup(obd);
 747                         if (err)
 748                                 CERROR("Cleanup %s returned %d\n",
 749                                        obd->obd_name, err);
 750                 }
 751
 752                 class_release_dev(obd);
 753         }
 754 }
 755 EXPORT_SYMBOL(class_decref);
 756
 757 /** Add a failover nid location.
 758  * Client obd types contact server obd types using this nid list.
 759  */
 760 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 761 {
 762         struct obd_import *imp;
 763         struct obd_uuid uuid;
 764         int rc;
 765         ENTRY;
 766
 767         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 768             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 769                 CERROR("invalid conn_uuid\n");
 770                 RETURN(-EINVAL);
 771         }
 772         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 773             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 774             strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) &&
 775             strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) &&
 776             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 777                 CERROR("can't add connection on non-client dev\n");
 778                 RETURN(-EINVAL);
 779         }
 780
 781         imp = obd->u.cli.cl_import;
 782         if (!imp) {
 783                 CERROR("try to add conn on immature client dev\n");
 784                 RETURN(-EINVAL);
 785         }
 786
 787         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 788         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 789
 790         RETURN(rc);
 791 }
 792 EXPORT_SYMBOL(class_add_conn);
 793
 794 /** Remove a failover nid location.
 795  */
 796 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 797 {
 798         struct obd_import *imp;
 799         struct obd_uuid uuid;
 800         int rc;
 801         ENTRY;
 802
 803         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 804             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 805                 CERROR("invalid conn_uuid\n");
 806                 RETURN(-EINVAL);
 807         }
 808         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 809             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 810                 CERROR("can't del connection on non-client dev\n");
 811                 RETURN(-EINVAL);
 812         }
 813
 814         imp = obd->u.cli.cl_import;
 815         if (!imp) {
 816                 CERROR("try to del conn on immature client dev\n");
 817                 RETURN(-EINVAL);
 818         }
 819
 820         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 821         rc = obd_del_conn(imp, &uuid);
 822
 823         RETURN(rc);
 824 }
 825
 826 struct list_head lustre_profile_list =
 827         LIST_HEAD_INIT(lustre_profile_list);
 828
 829 struct lustre_profile *class_get_profile(const char * prof)
 830 {
 831         struct lustre_profile *lprof;
 832
 833         ENTRY;
 834         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 835                 if (!strcmp(lprof->lp_profile, prof)) {
 836                         RETURN(lprof);
 837                 }
 838         }
 839         RETURN(NULL);
 840 }
 841 EXPORT_SYMBOL(class_get_profile);
 842
 843 /** Create a named "profile".
 844  * This defines the mdc and osc names to use for a client.
 845  * This also is used to define the lov to be used by a mdt.
 846  */
 847 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 848                       int mdclen, char *mdc)
 849 {
 850         struct lustre_profile *lprof;
 851         int err = 0;
 852         ENTRY;
 853
 854         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 855
 856         OBD_ALLOC(lprof, sizeof(*lprof));
 857         if (lprof == NULL)
 858                 RETURN(-ENOMEM);
 859         INIT_LIST_HEAD(&lprof->lp_list);
 860
 861         LASSERT(proflen == (strlen(prof) + 1));
 862         OBD_ALLOC(lprof->lp_profile, proflen);
 863         if (lprof->lp_profile == NULL)
 864                 GOTO(out, err = -ENOMEM);
 865         memcpy(lprof->lp_profile, prof, proflen);
 866
 867         LASSERT(osclen == (strlen(osc) + 1));
 868         OBD_ALLOC(lprof->lp_dt, osclen);
 869         if (lprof->lp_dt == NULL)
 870                 GOTO(out, err = -ENOMEM);
 871         memcpy(lprof->lp_dt, osc, osclen);
 872
 873         if (mdclen > 0) {
 874                 LASSERT(mdclen == (strlen(mdc) + 1));
 875                 OBD_ALLOC(lprof->lp_md, mdclen);
 876                 if (lprof->lp_md == NULL)
 877                         GOTO(out, err = -ENOMEM);
 878                 memcpy(lprof->lp_md, mdc, mdclen);
 879         }
 880
 881         list_add(&lprof->lp_list, &lustre_profile_list);
 882         RETURN(err);
 883
 884 out:
 885         if (lprof->lp_md)
 886                 OBD_FREE(lprof->lp_md, mdclen);
 887         if (lprof->lp_dt)
 888                 OBD_FREE(lprof->lp_dt, osclen);
 889         if (lprof->lp_profile)
 890                 OBD_FREE(lprof->lp_profile, proflen);
 891         OBD_FREE(lprof, sizeof(*lprof));
 892         RETURN(err);
 893 }
 894
 895 void class_del_profile(const char *prof)
 896 {
 897         struct lustre_profile *lprof;
 898         ENTRY;
 899
 900         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 901
 902         lprof = class_get_profile(prof);
 903         if (lprof) {
 904                 list_del(&lprof->lp_list);
 905                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 906                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 907                 if (lprof->lp_md)
 908                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 909                 OBD_FREE(lprof, sizeof *lprof);
 910         }
 911         EXIT;
 912 }
 913 EXPORT_SYMBOL(class_del_profile);
 914
 915 /* COMPAT_146 */
 916 void class_del_profiles(void)
 917 {
 918         struct lustre_profile *lprof, *n;
 919         ENTRY;
 920
 921         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 922                 list_del(&lprof->lp_list);
 923                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 924                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 925                 if (lprof->lp_md)
 926                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 927                 OBD_FREE(lprof, sizeof *lprof);
 928         }
 929         EXIT;
 930 }
 931 EXPORT_SYMBOL(class_del_profiles);
 932
 933 static int class_set_global(char *ptr, int val, struct lustre_cfg *lcfg)
 934 {
 935         ENTRY;
 936         if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
 937                 at_min = val;
 938         else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
 939                 at_max = val;
 940         else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
 941                 at_extra = val;
 942         else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
 943                 at_early_margin = val;
 944         else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
 945                 at_history = val;
 946         else if (class_match_param(ptr, PARAM_JOBID_VAR, NULL) == 0)
 947                 strlcpy(obd_jobid_var, lustre_cfg_string(lcfg, 2),
 948                         JOBSTATS_JOBID_VAR_MAX_LEN + 1);
 949         else
 950                 RETURN(-EINVAL);
 951
 952         CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
 953         RETURN(0);
 954 }
 955
 956
 957 /* We can't call ll_process_config or lquota_process_config directly because
 958  * it lives in a module that must be loaded after this one. */
 959 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
 960 static int (*quota_process_config)(struct lustre_cfg *lcfg) = NULL;
 961
 962 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 963 {
 964         client_process_config = cpc;
 965 }
 966 EXPORT_SYMBOL(lustre_register_client_process_config);
 967
 968 /**
 969  * Rename the proc parameter in \a cfg with a new name \a new_name.
 970  *
 971  * \param cfg      config structure which contains the proc parameter
 972  * \param new_name new name of the proc parameter
 973  *
 974  * \retval valid-pointer    pointer to the newly-allocated config structure
 975  *                          which contains the renamed proc parameter
 976  * \retval ERR_PTR(-EINVAL) if \a cfg or \a new_name is NULL, or \a cfg does
 977  *                          not contain a proc parameter
 978  * \retval ERR_PTR(-ENOMEM) if memory allocation failure occurs
 979  */
 980 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
 981                                      const char *new_name)
 982 {
 983         struct lustre_cfg_bufs  *bufs = NULL;
 984         struct lustre_cfg       *new_cfg = NULL;
 985         char                    *param = NULL;
 986         char                    *new_param = NULL;
 987         char                    *value = NULL;
 988         int                      name_len = 0;
 989         int                      new_len = 0;
 990         ENTRY;
 991
 992         if (cfg == NULL || new_name == NULL)
 993                 RETURN(ERR_PTR(-EINVAL));
 994
 995         param = lustre_cfg_string(cfg, 1);
 996         if (param == NULL)
 997                 RETURN(ERR_PTR(-EINVAL));
 998
 999         value = strchr(param, '=');
1000         if (value == NULL)
1001                 name_len = strlen(param);
1002         else
1003                 name_len = value - param;
1004
1005         new_len = LUSTRE_CFG_BUFLEN(cfg, 1) + strlen(new_name) - name_len;
1006
1007         OBD_ALLOC(new_param, new_len);
1008         if (new_param == NULL)
1009                 RETURN(ERR_PTR(-ENOMEM));
1010
1011         strcpy(new_param, new_name);
1012         if (value != NULL)
1013                 strcat(new_param, value);
1014
1015         OBD_ALLOC_PTR(bufs);
1016         if (bufs == NULL) {
1017                 OBD_FREE(new_param, new_len);
1018                 RETURN(ERR_PTR(-ENOMEM));
1019         }
1020
1021         lustre_cfg_bufs_reset(bufs, NULL);
1022         lustre_cfg_bufs_init(bufs, cfg);
1023         lustre_cfg_bufs_set_string(bufs, 1, new_param);
1024
1025         new_cfg = lustre_cfg_new(cfg->lcfg_command, bufs);
1026
1027         OBD_FREE(new_param, new_len);
1028         OBD_FREE_PTR(bufs);
1029         if (new_cfg == NULL)
1030                 RETURN(ERR_PTR(-ENOMEM));
1031
1032         new_cfg->lcfg_num = cfg->lcfg_num;
1033         new_cfg->lcfg_flags = cfg->lcfg_flags;
1034         new_cfg->lcfg_nid = cfg->lcfg_nid;
1035         new_cfg->lcfg_nal = cfg->lcfg_nal;
1036
1037         RETURN(new_cfg);
1038 }
1039 EXPORT_SYMBOL(lustre_cfg_rename);
1040
1041 static int process_param2_config(struct lustre_cfg *lcfg)
1042 {
1043         char *param = lustre_cfg_string(lcfg, 1);
1044         char *upcall = lustre_cfg_string(lcfg, 2);
1045         char *argv[] = {
1046                 [0] = "/usr/sbin/lctl",
1047                 [1] = "set_param",
1048                 [2] = param,
1049                 [3] = NULL
1050         };
1051         struct timeval  start;
1052         struct timeval  end;
1053         int             rc;
1054         ENTRY;
1055
1056         /* Add upcall processing here. Now only lctl is supported */
1057         if (strcmp(upcall, LCTL_UPCALL) != 0) {
1058                 CERROR("Unsupported upcall %s\n", upcall);
1059                 RETURN(-EINVAL);
1060         }
1061
1062         do_gettimeofday(&start);
1063         rc = call_usermodehelper(argv[0], argv, NULL, 0);
1064         do_gettimeofday(&end);
1065
1066         if (rc < 0) {
1067                 CERROR("lctl: error invoking upcall %s %s %s: rc = %d; "
1068                        "time %ldus\n", argv[0], argv[1], argv[2], rc,
1069                        cfs_timeval_sub(&end, &start, NULL));
1070         } else {
1071                 CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
1072                        argv[0], argv[1], argv[2],
1073                        cfs_timeval_sub(&end, &start, NULL));
1074                        rc = 0;
1075         }
1076
1077         RETURN(rc);
1078 }
1079
1080 void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
1081 {
1082         quota_process_config = qpc;
1083 }
1084 EXPORT_SYMBOL(lustre_register_quota_process_config);
1085
1086 /** Process configuration commands given in lustre_cfg form.
1087  * These may come from direct calls (e.g. class_manual_cleanup)
1088  * or processing the config llog, or ioctl from lctl.
1089  */
1090 int class_process_config(struct lustre_cfg *lcfg)
1091 {
1092         struct obd_device *obd;
1093         int err;
1094
1095         LASSERT(lcfg && !IS_ERR(lcfg));
1096         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
1097
1098         /* Commands that don't need a device */
1099         switch(lcfg->lcfg_command) {
1100         case LCFG_ATTACH: {
1101                 err = class_attach(lcfg);
1102                 GOTO(out, err);
1103         }
1104         case LCFG_ADD_UUID: {
1105                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
1106                        " (%s)\n", lustre_cfg_string(lcfg, 1),
1107                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
1108
1109                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
1110                 GOTO(out, err);
1111         }
1112         case LCFG_DEL_UUID: {
1113                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
1114                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
1115                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
1116
1117                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
1118                 GOTO(out, err);
1119         }
1120         case LCFG_MOUNTOPT: {
1121                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
1122                        lustre_cfg_string(lcfg, 1),
1123                        lustre_cfg_string(lcfg, 2),
1124                        lustre_cfg_string(lcfg, 3));
1125                 /* set these mount options somewhere, so ll_fill_super
1126                  * can find them. */
1127                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
1128                                         lustre_cfg_string(lcfg, 1),
1129                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
1130                                         lustre_cfg_string(lcfg, 2),
1131                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
1132                                         lustre_cfg_string(lcfg, 3));
1133                 GOTO(out, err);
1134         }
1135         case LCFG_DEL_MOUNTOPT: {
1136                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
1137                        lustre_cfg_string(lcfg, 1));
1138                 class_del_profile(lustre_cfg_string(lcfg, 1));
1139                 GOTO(out, err = 0);
1140         }
1141         case LCFG_SET_TIMEOUT: {
1142                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
1143                        obd_timeout, lcfg->lcfg_num);
1144                 obd_timeout = max(lcfg->lcfg_num, 1U);
1145                 obd_timeout_set = 1;
1146                 GOTO(out, err = 0);
1147         }
1148         case LCFG_SET_LDLM_TIMEOUT: {
1149                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
1150                        ldlm_timeout, lcfg->lcfg_num);
1151                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
1152                 if (ldlm_timeout >= obd_timeout)
1153                         ldlm_timeout = max(obd_timeout / 3, 1U);
1154                 ldlm_timeout_set = 1;
1155                 GOTO(out, err = 0);
1156         }
1157         case LCFG_SET_UPCALL: {
1158                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
1159                 /* COMPAT_146 Don't fail on old configs */
1160                 GOTO(out, err = 0);
1161         }
1162         case LCFG_MARKER: {
1163                 struct cfg_marker *marker;
1164                 marker = lustre_cfg_buf(lcfg, 1);
1165                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
1166                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
1167                 GOTO(out, err = 0);
1168         }
1169         case LCFG_PARAM: {
1170                 char *tmp;
1171                 /* llite has no obd */
1172                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
1173                                        PARAM_LLITE, 0) == 0) &&
1174                     client_process_config) {
1175                         err = (*client_process_config)(lcfg);
1176                         GOTO(out, err);
1177                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1178                                               PARAM_SYS, &tmp) == 0)) {
1179                         /* Global param settings */
1180                         err = class_set_global(tmp, lcfg->lcfg_num, lcfg);
1181                         /*
1182                          * Client or server should not fail to mount if
1183                          * it hits an unknown configuration parameter.
1184                          */
1185                         if (err != 0)
1186                                 CWARN("Ignoring unknown param %s\n", tmp);
1187
1188                         GOTO(out, err = 0);
1189                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1190                                               PARAM_QUOTA, &tmp) == 0) &&
1191                            quota_process_config) {
1192                         err = (*quota_process_config)(lcfg);
1193                         GOTO(out, err);
1194                 }
1195
1196                 break;
1197         }
1198         case LCFG_SET_PARAM: {
1199                 err = process_param2_config(lcfg);
1200                 GOTO(out, err = 0);
1201         }
1202         }
1203         /* Commands that require a device */
1204         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1205         if (obd == NULL) {
1206                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
1207                         CERROR("this lcfg command requires a device name\n");
1208                 else
1209                         CERROR("no device for: %s\n",
1210                                lustre_cfg_string(lcfg, 0));
1211
1212                 GOTO(out, err = -EINVAL);
1213         }
1214
1215         switch(lcfg->lcfg_command) {
1216         case LCFG_SETUP: {
1217                 err = class_setup(obd, lcfg);
1218                 GOTO(out, err);
1219         }
1220         case LCFG_DETACH: {
1221                 err = class_detach(obd, lcfg);
1222                 GOTO(out, err = 0);
1223         }
1224         case LCFG_CLEANUP: {
1225                 err = class_cleanup(obd, lcfg);
1226                 GOTO(out, err = 0);
1227         }
1228         case LCFG_ADD_CONN: {
1229                 err = class_add_conn(obd, lcfg);
1230                 GOTO(out, err = 0);
1231         }
1232         case LCFG_DEL_CONN: {
1233                 err = class_del_conn(obd, lcfg);
1234                 GOTO(out, err = 0);
1235         }
1236         case LCFG_POOL_NEW: {
1237                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
1238                 GOTO(out, err = 0);
1239         }
1240         case LCFG_POOL_ADD: {
1241                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1242                                    lustre_cfg_string(lcfg, 3));
1243                 GOTO(out, err = 0);
1244         }
1245         case LCFG_POOL_REM: {
1246                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1247                                    lustre_cfg_string(lcfg, 3));
1248                 GOTO(out, err = 0);
1249         }
1250         case LCFG_POOL_DEL: {
1251                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
1252                 GOTO(out, err = 0);
1253         }
1254         default: {
1255                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
1256                 GOTO(out, err);
1257
1258         }
1259         }
1260 out:
1261         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
1262                 CWARN("Ignoring error %d on optional command %#x\n", err,
1263                       lcfg->lcfg_command);
1264                 err = 0;
1265         }
1266         return err;
1267 }
1268 EXPORT_SYMBOL(class_process_config);
1269
1270 #ifndef HAVE_ONLY_PROCFS_SEQ
1271 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
1272                              struct lustre_cfg *lcfg, void *data)
1273 {
1274 #ifdef __KERNEL__
1275         struct lprocfs_vars *var;
1276         char *key, *sval;
1277         int i, keylen, vallen;
1278         int matched = 0, j = 0;
1279         int rc = 0;
1280         int skip = 0;
1281         ENTRY;
1282
1283         if (lcfg->lcfg_command != LCFG_PARAM) {
1284                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1285                 RETURN(-EINVAL);
1286         }
1287
1288         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1289            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1290            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1291         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1292                 key = lustre_cfg_buf(lcfg, i);
1293                 /* Strip off prefix */
1294                 if (class_match_param(key, prefix, &key))
1295                         /* If the prefix doesn't match, return error so we
1296                          * can pass it down the stack */
1297                         RETURN(-ENOSYS);
1298                 sval = strchr(key, '=');
1299                 if (!sval || (*(sval + 1) == 0)) {
1300                         CERROR("Can't parse param %s (missing '=')\n", key);
1301                         /* rc = -EINVAL;        continue parsing other params */
1302                         continue;
1303                 }
1304                 keylen = sval - key;
1305                 sval++;
1306                 vallen = strlen(sval);
1307                 matched = 0;
1308                 j = 0;
1309                 /* Search proc entries */
1310                 while (lvars[j].name) {
1311                         var = &lvars[j];
1312                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1313                             keylen == strlen(var->name)) {
1314                                 matched++;
1315                                 rc = -EROFS;
1316
1317                                 if (var->write_fptr) {
1318                                         mm_segment_t oldfs;
1319                                         oldfs = get_fs();
1320                                         set_fs(KERNEL_DS);
1321                                         rc = (var->write_fptr)(NULL, sval,
1322                                                                 vallen, data);
1323                                         set_fs(oldfs);
1324                                 }
1325                                 break;
1326                         }
1327                         j++;
1328                 }
1329                 if (!matched) {
1330                         CERROR("%.*s: %s unknown param %s\n",
1331                                (int)strlen(prefix) - 1, prefix,
1332                                (char *)lustre_cfg_string(lcfg, 0), key);
1333                         /* rc = -EINVAL;        continue parsing other params */
1334                         skip++;
1335                 } else if (rc < 0) {
1336                         CERROR("%s: error writing proc entry '%s': rc = %d\n",
1337                                prefix, var->name, rc);
1338                         rc = 0;
1339                 } else {
1340                         CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1341                                          lustre_cfg_string(lcfg, 0),
1342                                          (int)strlen(prefix) - 1, prefix,
1343                                          (int)(sval - key - 1), key, sval);
1344                 }
1345         }
1346
1347         if (rc > 0)
1348                 rc = 0;
1349         if (!rc && skip)
1350                 rc = skip;
1351         RETURN(rc);
1352 #else
1353         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1354         /* Don't throw config error */
1355         RETURN(0);
1356 #endif
1357 }
1358 EXPORT_SYMBOL(class_process_proc_param);
1359 #endif
1360
1361 int class_process_proc_seq_param(char *prefix, struct lprocfs_seq_vars *lvars,
1362                                  struct lustre_cfg *lcfg, void *data)
1363 {
1364 #ifdef __KERNEL__
1365         struct lprocfs_seq_vars *var;
1366         struct file fakefile;
1367         struct seq_file fake_seqfile;
1368         char *key, *sval;
1369         int i, keylen, vallen;
1370         int matched = 0, j = 0;
1371         int rc = 0;
1372         int skip = 0;
1373         ENTRY;
1374
1375         if (lcfg->lcfg_command != LCFG_PARAM) {
1376                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1377                 RETURN(-EINVAL);
1378         }
1379
1380         /* fake a seq file so that var->fops->write can work... */
1381         fakefile.private_data = &fake_seqfile;
1382         fake_seqfile.private = data;
1383         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1384            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1385            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1386         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1387                 key = lustre_cfg_buf(lcfg, i);
1388                 /* Strip off prefix */
1389                 if (class_match_param(key, prefix, &key))
1390                         /* If the prefix doesn't match, return error so we
1391                          * can pass it down the stack */
1392                         RETURN(-ENOSYS);
1393                 sval = strchr(key, '=');
1394                 if (!sval || (*(sval + 1) == 0)) {
1395                         CERROR("Can't parse param %s (missing '=')\n", key);
1396                         /* rc = -EINVAL;        continue parsing other params */
1397                         continue;
1398                 }
1399                 keylen = sval - key;
1400                 sval++;
1401                 vallen = strlen(sval);
1402                 matched = 0;
1403                 j = 0;
1404                 /* Search proc entries */
1405                 while (lvars[j].name) {
1406                         var = &lvars[j];
1407                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1408                             keylen == strlen(var->name)) {
1409                                 matched++;
1410                                 rc = -EROFS;
1411
1412                                 if (var->fops && var->fops->write) {
1413                                         mm_segment_t oldfs;
1414                                         oldfs = get_fs();
1415                                         set_fs(KERNEL_DS);
1416                                         rc = (var->fops->write)(&fakefile, sval,
1417                                                                 vallen, NULL);
1418                                         set_fs(oldfs);
1419                                 }
1420                                 break;
1421                         }
1422                         j++;
1423                 }
1424                 if (!matched) {
1425                         CERROR("%.*s: %s unknown param %s\n",
1426                                (int)strlen(prefix) - 1, prefix,
1427                                (char *)lustre_cfg_string(lcfg, 0), key);
1428                         /* rc = -EINVAL;        continue parsing other params */
1429                         skip++;
1430                 } else if (rc < 0) {
1431                         CERROR("%s: error writing proc entry '%s': rc = %d\n",
1432                                prefix, var->name, rc);
1433                         rc = 0;
1434                 } else {
1435                         CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1436                                          lustre_cfg_string(lcfg, 0),
1437                                          (int)strlen(prefix) - 1, prefix,
1438                                          (int)(sval - key - 1), key, sval);
1439                 }
1440         }
1441
1442         if (rc > 0)
1443                 rc = 0;
1444         if (!rc && skip)
1445                 rc = skip;
1446         RETURN(rc);
1447 #else
1448         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1449         /* Don't throw config error */
1450         RETURN(0);
1451 #endif
1452 }
1453 EXPORT_SYMBOL(class_process_proc_seq_param);
1454
1455 #ifdef __KERNEL__
1456 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1457 #else
1458 #define lustre_check_exclusion(a,b)  0
1459 #endif
1460
1461 /*
1462  * Supplemental functions for config logs, it allocates lustre_cfg
1463  * buffers plus initialized llog record header at the beginning.
1464  */
1465 struct llog_cfg_rec *lustre_cfg_rec_new(int cmd, struct lustre_cfg_bufs *bufs)
1466 {
1467         struct llog_cfg_rec     *lcr;
1468         int                      reclen;
1469
1470         ENTRY;
1471
1472         reclen = lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen);
1473         reclen = llog_data_len(reclen) + sizeof(struct llog_rec_hdr) +
1474                  sizeof(struct llog_rec_tail);
1475
1476         OBD_ALLOC(lcr, reclen);
1477         if (lcr == NULL)
1478                 RETURN(NULL);
1479
1480         lustre_cfg_init(&lcr->lcr_cfg, cmd, bufs);
1481
1482         lcr->lcr_hdr.lrh_len = reclen;
1483         lcr->lcr_hdr.lrh_type = OBD_CFG_REC;
1484
1485         RETURN(lcr);
1486 }
1487 EXPORT_SYMBOL(lustre_cfg_rec_new);
1488
1489 void lustre_cfg_rec_free(struct llog_cfg_rec *lcr)
1490 {
1491         ENTRY;
1492         OBD_FREE(lcr, lcr->lcr_hdr.lrh_len);
1493         EXIT;
1494 }
1495 EXPORT_SYMBOL(lustre_cfg_rec_free);
1496
1497 /** Parse a configuration llog, doing various manipulations on them
1498  * for various reasons, (modifications for compatibility, skip obsolete
1499  * records, change uuids, etc), then class_process_config() resulting
1500  * net records.
1501  */
1502 int class_config_llog_handler(const struct lu_env *env,
1503                               struct llog_handle *handle,
1504                               struct llog_rec_hdr *rec, void *data)
1505 {
1506         struct config_llog_instance *clli = data;
1507         int cfg_len = rec->lrh_len;
1508         char *cfg_buf = (char*) (rec + 1);
1509         int rc = 0;
1510         ENTRY;
1511
1512         //class_config_dump_handler(handle, rec, data);
1513
1514         switch (rec->lrh_type) {
1515         case OBD_CFG_REC: {
1516                 struct lustre_cfg *lcfg, *lcfg_new;
1517                 struct lustre_cfg_bufs bufs;
1518                 char *inst_name = NULL;
1519                 int inst_len = 0;
1520                 int inst = 0, swab = 0;
1521
1522                 lcfg = (struct lustre_cfg *)cfg_buf;
1523                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1524                         lustre_swab_lustre_cfg(lcfg);
1525                         swab = 1;
1526                 }
1527
1528                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1529                 if (rc)
1530                         GOTO(out, rc);
1531
1532                 /* Figure out config state info */
1533                 if (lcfg->lcfg_command == LCFG_MARKER) {
1534                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1535                         lustre_swab_cfg_marker(marker, swab,
1536                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1537                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1538                                clli->cfg_flags, marker->cm_flags);
1539                         if (marker->cm_flags & CM_START) {
1540                                 /* all previous flags off */
1541                                 clli->cfg_flags = CFG_F_MARKER;
1542                                 server_name2index(marker->cm_tgtname,
1543                                                   &clli->cfg_lwp_idx, NULL);
1544                                 if (marker->cm_flags & CM_SKIP) {
1545                                         clli->cfg_flags |= CFG_F_SKIP;
1546                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1547                                                marker->cm_step);
1548                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1549                                            (clli->cfg_sb &&
1550                                             lustre_check_exclusion(clli->cfg_sb,
1551                                                          marker->cm_tgtname))) {
1552                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1553                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1554                                                marker->cm_step);
1555                                 }
1556                         } else if (marker->cm_flags & CM_END) {
1557                                 clli->cfg_flags = 0;
1558                         }
1559                 }
1560                 /* A config command without a start marker before it is
1561                    illegal (post 146) */
1562                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1563                     !(clli->cfg_flags & CFG_F_MARKER) &&
1564                     (lcfg->lcfg_command != LCFG_MARKER)) {
1565                         CWARN("Config not inside markers, ignoring! "
1566                               "(inst: %p, uuid: %s, flags: %#x)\n",
1567                               clli->cfg_instance,
1568                               clli->cfg_uuid.uuid, clli->cfg_flags);
1569                         clli->cfg_flags |= CFG_F_SKIP;
1570                 }
1571                 if (clli->cfg_flags & CFG_F_SKIP) {
1572                         CDEBUG(D_CONFIG, "skipping %#x\n",
1573                                clli->cfg_flags);
1574                         rc = 0;
1575                         /* No processing! */
1576                         break;
1577                 }
1578
1579                 /*
1580                  * For interoperability between 1.8 and 2.0,
1581                  * rename "mds" obd device type to "mdt".
1582                  */
1583                 {
1584                         char *typename = lustre_cfg_string(lcfg, 1);
1585                         char *index = lustre_cfg_string(lcfg, 2);
1586
1587                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1588                              strcmp(typename, "mds") == 0)) {
1589                                 CWARN("For 1.8 interoperability, rename obd "
1590                                        "type from mds to mdt\n");
1591                                 typename[2] = 't';
1592                         }
1593                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1594                              strcmp(index, "type") == 0)) {
1595                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1596                                        "set this index to '0'\n");
1597                                 index[0] = '0';
1598                                 index[1] = 0;
1599                         }
1600                 }
1601
1602 #if defined(HAVE_SERVER_SUPPORT) && defined(__KERNEL__)
1603                 /* newer MDS replaces LOV/OSC with LOD/OSP */
1604                 {
1605                         char *typename = lustre_cfg_string(lcfg, 1);
1606
1607                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1608                             strcmp(typename, LUSTRE_LOV_NAME) == 0) &&
1609                             IS_MDT(s2lsi(clli->cfg_sb))) {
1610                                 CDEBUG(D_CONFIG,
1611                                        "For 2.x interoperability, rename obd "
1612                                        "type from lov to lod (%s)\n",
1613                                        s2lsi(clli->cfg_sb)->lsi_svname);
1614                                 strcpy(typename, LUSTRE_LOD_NAME);
1615                         }
1616                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1617                             strcmp(typename, LUSTRE_OSC_NAME) == 0) &&
1618                             IS_MDT(s2lsi(clli->cfg_sb))) {
1619                                 CDEBUG(D_CONFIG,
1620                                        "For 2.x interoperability, rename obd "
1621                                        "type from osc to osp (%s)\n",
1622                                        s2lsi(clli->cfg_sb)->lsi_svname);
1623                                 strcpy(typename, LUSTRE_OSP_NAME);
1624                         }
1625                 }
1626 #endif
1627
1628                 if (clli->cfg_flags & CFG_F_EXCLUDE) {
1629                         CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
1630                                lcfg->lcfg_command);
1631                         if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
1632                                 /* Add inactive instead */
1633                                 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1634                 }
1635
1636                 lustre_cfg_bufs_init(&bufs, lcfg);
1637
1638                 if (clli && clli->cfg_instance &&
1639                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1640                         inst = 1;
1641                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1642                                    sizeof(clli->cfg_instance) * 2 + 4;
1643                         OBD_ALLOC(inst_name, inst_len);
1644                         if (inst_name == NULL)
1645                                 GOTO(out, rc = -ENOMEM);
1646                         sprintf(inst_name, "%s-%p",
1647                                 lustre_cfg_string(lcfg, 0),
1648                                 clli->cfg_instance);
1649                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1650                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1651                                lcfg->lcfg_command, inst_name);
1652                 }
1653
1654                 /* we override the llog's uuid for clients, to insure they
1655                 are unique */
1656                 if (clli && clli->cfg_instance != NULL &&
1657                     lcfg->lcfg_command == LCFG_ATTACH) {
1658                         lustre_cfg_bufs_set_string(&bufs, 2,
1659                                                    clli->cfg_uuid.uuid);
1660                 }
1661                 /*
1662                  * sptlrpc config record, we expect 2 data segments:
1663                  *  [0]: fs_name/target_name,
1664                  *  [1]: rule string
1665                  * moving them to index [1] and [2], and insert MGC's
1666                  * obdname at index [0].
1667                  */
1668                 if (clli && clli->cfg_instance == NULL &&
1669                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1670                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1671                                             bufs.lcfg_buflen[1]);
1672                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1673                                             bufs.lcfg_buflen[0]);
1674                         lustre_cfg_bufs_set_string(&bufs, 0,
1675                                                    clli->cfg_obdname);
1676                 }
1677
1678                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1679                 if (lcfg_new == NULL)
1680                         GOTO(out, rc = -ENOMEM);
1681
1682                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1683                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1684
1685                 /* XXX Hack to try to remain binary compatible with
1686                  * pre-newconfig logs */
1687                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1688                     (lcfg->lcfg_nid >> 32) == 0) {
1689                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1690
1691                         lcfg_new->lcfg_nid =
1692                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1693                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1694                               lcfg->lcfg_nal, addr,
1695                               libcfs_nid2str(lcfg_new->lcfg_nid));
1696                 } else {
1697                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1698                 }
1699
1700                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1701
1702                 rc = class_process_config(lcfg_new);
1703                 lustre_cfg_free(lcfg_new);
1704
1705                 if (inst)
1706                         OBD_FREE(inst_name, inst_len);
1707                 break;
1708         }
1709         default:
1710                 CERROR("Unknown llog record type %#x encountered\n",
1711                        rec->lrh_type);
1712                 break;
1713         }
1714 out:
1715         if (rc) {
1716                 CERROR("%s: cfg command failed: rc = %d\n",
1717                        handle->lgh_ctxt->loc_obd->obd_name, rc);
1718                 class_config_dump_handler(NULL, handle, rec, data);
1719         }
1720         RETURN(rc);
1721 }
1722 EXPORT_SYMBOL(class_config_llog_handler);
1723
1724 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1725                             char *name, struct config_llog_instance *cfg)
1726 {
1727         struct llog_process_cat_data     cd = {0, 0};
1728         struct llog_handle              *llh;
1729         llog_cb_t                        callback;
1730         int                              rc;
1731         ENTRY;
1732
1733         CDEBUG(D_INFO, "looking up llog %s\n", name);
1734         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1735         if (rc)
1736                 RETURN(rc);
1737
1738         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1739         if (rc)
1740                 GOTO(parse_out, rc);
1741
1742         /* continue processing from where we last stopped to end-of-log */
1743         if (cfg) {
1744                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1745                 callback = cfg->cfg_callback;
1746                 LASSERT(callback != NULL);
1747         } else {
1748                 callback = class_config_llog_handler;
1749         }
1750
1751         cd.lpcd_last_idx = 0;
1752
1753         rc = llog_process(env, llh, callback, cfg, &cd);
1754
1755         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1756                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1757         if (cfg)
1758                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1759
1760 parse_out:
1761         llog_close(env, llh);
1762         RETURN(rc);
1763 }
1764 EXPORT_SYMBOL(class_config_parse_llog);
1765
1766 struct lcfg_type_data {
1767         __u32    ltd_type;
1768         char    *ltd_name;
1769         char    *ltd_bufs[4];
1770 } lcfg_data_table[] = {
1771         { LCFG_ATTACH, "attach", { "type", "UUID", "3", "4" } },
1772         { LCFG_DETACH, "detach", { "1", "2", "3", "4" } },
1773         { LCFG_SETUP, "setup", { "UUID", "node", "options", "failout" } },
1774         { LCFG_CLEANUP, "cleanup", { "1", "2", "3", "4" } },
1775         { LCFG_ADD_UUID, "add_uuid", { "node", "2", "3", "4" }  },
1776         { LCFG_DEL_UUID, "del_uuid", { "1", "2", "3", "4" }  },
1777         { LCFG_MOUNTOPT, "new_profile", { "name", "lov", "lmv", "4" }  },
1778         { LCFG_DEL_MOUNTOPT, "del_mountopt", { "1", "2", "3", "4" } , },
1779         { LCFG_SET_TIMEOUT, "set_timeout", { "parameter", "2", "3", "4" }  },
1780         { LCFG_SET_UPCALL, "set_upcall", { "1", "2", "3", "4" }  },
1781         { LCFG_ADD_CONN, "add_conn", { "node", "2", "3", "4" }  },
1782         { LCFG_DEL_CONN, "del_conn", { "1", "2", "3", "4" }  },
1783         { LCFG_LOV_ADD_OBD, "add_osc", { "ost", "index", "gen", "UUID" } },
1784         { LCFG_LOV_DEL_OBD, "del_osc", { "1", "2", "3", "4" } },
1785         { LCFG_PARAM, "set_param", { "parameter", "value", "3", "4" } },
1786         { LCFG_MARKER, "marker", { "1", "2", "3", "4" } },
1787         { LCFG_LOG_START, "log_start", { "1", "2", "3", "4" } },
1788         { LCFG_LOG_END, "log_end", { "1", "2", "3", "4" } },
1789         { LCFG_LOV_ADD_INA, "add_osc_inactive", { "1", "2", "3", "4" }  },
1790         { LCFG_ADD_MDC, "add_mdc", { "mdt", "index", "gen", "UUID" } },
1791         { LCFG_DEL_MDC, "del_mdc", { "1", "2", "3", "4" } },
1792         { LCFG_SPTLRPC_CONF, "security", { "parameter", "2", "3", "4" } },
1793         { LCFG_POOL_NEW, "new_pool", { "fsname", "pool", "3", "4" }  },
1794         { LCFG_POOL_ADD, "add_pool", { "fsname", "pool", "ost", "4" } },
1795         { LCFG_POOL_REM, "remove_pool", { "fsname", "pool", "ost", "4" } },
1796         { LCFG_POOL_DEL, "del_pool", { "fsname", "pool", "3", "4" } },
1797         { LCFG_SET_LDLM_TIMEOUT, "set_ldlm_timeout",
1798           { "parameter", "2", "3", "4" } },
1799         { 0, NULL, { NULL, NULL, NULL, NULL } }
1800 };
1801
1802 static struct lcfg_type_data *lcfg_cmd2data(__u32 cmd)
1803 {
1804         int i = 0;
1805
1806         while (lcfg_data_table[i].ltd_type != 0) {
1807                 if (lcfg_data_table[i].ltd_type == cmd)
1808                         return &lcfg_data_table[i];
1809                 i++;
1810         }
1811         return NULL;
1812 }
1813
1814 /**
1815  * parse config record and output dump in supplied buffer.
1816  * This is separated from class_config_dump_handler() to use
1817  * for ioctl needs as well
1818  *
1819  * Sample Output:
1820  * - { event: attach, device: lustrewt-clilov, type: lov, UUID:
1821  *     lustrewt-clilov_UUID }
1822  */
1823 int class_config_yaml_output(struct llog_rec_hdr *rec, char *buf, int size)
1824 {
1825         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1826         char                    *ptr = buf;
1827         char                    *end = buf + size;
1828         int                      rc = 0, i;
1829         struct lcfg_type_data   *ldata;
1830
1831         LASSERT(rec->lrh_type == OBD_CFG_REC);
1832         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1833         if (rc < 0)
1834                 return rc;
1835
1836         ldata = lcfg_cmd2data(lcfg->lcfg_command);
1837         if (ldata == NULL)
1838                 return -ENOTTY;
1839
1840         if (lcfg->lcfg_command == LCFG_MARKER)
1841                 return 0;
1842
1843         /* form YAML entity */
1844         ptr += snprintf(ptr, end - ptr, "- { event: %s", ldata->ltd_name);
1845
1846         if (lcfg->lcfg_flags)
1847                 ptr += snprintf(ptr, end - ptr, ", flags: %#08x",
1848                                 lcfg->lcfg_flags);
1849         if (lcfg->lcfg_num)
1850                 ptr += snprintf(ptr, end - ptr, ", num: %#08x",
1851                                 lcfg->lcfg_num);
1852         if (lcfg->lcfg_nid)
1853                 ptr += snprintf(ptr, end - ptr, ", nid: %s("LPX64")",
1854                                 libcfs_nid2str(lcfg->lcfg_nid),
1855                                 lcfg->lcfg_nid);
1856
1857         if (LUSTRE_CFG_BUFLEN(lcfg, 0) > 0)
1858                 ptr += snprintf(ptr, end - ptr, ", device: %s",
1859                                 lustre_cfg_string(lcfg, 0));
1860
1861         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1862                 if (LUSTRE_CFG_BUFLEN(lcfg, i) > 0)
1863                         ptr += snprintf(ptr, end - ptr, ", %s: %s",
1864                                         ldata->ltd_bufs[i - 1],
1865                                         lustre_cfg_string(lcfg, i));
1866         }
1867
1868         ptr += snprintf(ptr, end - ptr, " }\n");
1869         /* return consumed bytes */
1870         rc = ptr - buf;
1871         return rc;
1872 }
1873
1874 /**
1875  * parse config record and output dump in supplied buffer.
1876  * This is separated from class_config_dump_handler() to use
1877  * for ioctl needs as well
1878  */
1879 int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
1880 {
1881         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1882         char                    *ptr = buf;
1883         char                    *end = buf + size;
1884         int                      rc = 0;
1885
1886         ENTRY;
1887
1888         LASSERT(rec->lrh_type == OBD_CFG_REC);
1889         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1890         if (rc < 0)
1891                 RETURN(rc);
1892
1893         ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
1894         if (lcfg->lcfg_flags)
1895                 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1896                                 lcfg->lcfg_flags);
1897
1898         if (lcfg->lcfg_num)
1899                 ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
1900
1901         if (lcfg->lcfg_nid)
1902                 ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1903                                 libcfs_nid2str(lcfg->lcfg_nid),
1904                                 lcfg->lcfg_nid);
1905
1906         if (lcfg->lcfg_command == LCFG_MARKER) {
1907                 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1908
1909                 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1910                                 marker->cm_step, marker->cm_flags,
1911                                 marker->cm_tgtname, marker->cm_comment);
1912         } else {
1913                 int i;
1914
1915                 for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1916                         ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1917                                         lustre_cfg_string(lcfg, i));
1918                 }
1919         }
1920         ptr += snprintf(ptr, end - ptr, "\n");
1921         /* return consumed bytes */
1922         rc = ptr - buf;
1923         RETURN(rc);
1924 }
1925
1926 int class_config_dump_handler(const struct lu_env *env,
1927                               struct llog_handle *handle,
1928                               struct llog_rec_hdr *rec, void *data)
1929 {
1930         char    *outstr;
1931         int      rc = 0;
1932
1933         ENTRY;
1934
1935         OBD_ALLOC(outstr, 256);
1936         if (outstr == NULL)
1937                 RETURN(-ENOMEM);
1938
1939         if (rec->lrh_type == OBD_CFG_REC) {
1940                 class_config_parse_rec(rec, outstr, 256);
1941                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1942         } else {
1943                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1944                 rc = -EINVAL;
1945         }
1946
1947         OBD_FREE(outstr, 256);
1948         RETURN(rc);
1949 }
1950
1951 int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1952                            char *name, struct config_llog_instance *cfg)
1953 {
1954         struct llog_handle      *llh;
1955         int                      rc;
1956
1957         ENTRY;
1958
1959         LCONSOLE_INFO("Dumping config log %s\n", name);
1960
1961         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1962         if (rc)
1963                 RETURN(rc);
1964
1965         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1966         if (rc)
1967                 GOTO(parse_out, rc);
1968
1969         rc = llog_process(env, llh, class_config_dump_handler, cfg, NULL);
1970 parse_out:
1971         llog_close(env, llh);
1972
1973         LCONSOLE_INFO("End config log %s\n", name);
1974         RETURN(rc);
1975 }
1976 EXPORT_SYMBOL(class_config_dump_llog);
1977
1978 /** Call class_cleanup and class_detach.
1979  * "Manual" only in the sense that we're faking lcfg commands.
1980  */
1981 int class_manual_cleanup(struct obd_device *obd)
1982 {
1983         char                    flags[3] = "";
1984         struct lustre_cfg      *lcfg;
1985         struct lustre_cfg_bufs  bufs;
1986         int                     rc;
1987         ENTRY;
1988
1989         if (!obd) {
1990                 CERROR("empty cleanup\n");
1991                 RETURN(-EALREADY);
1992         }
1993
1994         if (obd->obd_force)
1995                 strcat(flags, "F");
1996         if (obd->obd_fail)
1997                 strcat(flags, "A");
1998
1999         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
2000                obd->obd_name, flags);
2001
2002         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
2003         lustre_cfg_bufs_set_string(&bufs, 1, flags);
2004         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
2005         if (!lcfg)
2006                 RETURN(-ENOMEM);
2007
2008         rc = class_process_config(lcfg);
2009         if (rc) {
2010                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
2011                 GOTO(out, rc);
2012         }
2013
2014         /* the lcfg is almost the same for both ops */
2015         lcfg->lcfg_command = LCFG_DETACH;
2016         rc = class_process_config(lcfg);
2017         if (rc)
2018                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
2019 out:
2020         lustre_cfg_free(lcfg);
2021         RETURN(rc);
2022 }
2023 EXPORT_SYMBOL(class_manual_cleanup);
2024
2025 /*
2026  * uuid<->export lustre hash operations
2027  */
2028
2029 static unsigned
2030 uuid_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2031 {
2032         return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
2033                                   sizeof(((struct obd_uuid *)key)->uuid), mask);
2034 }
2035
2036 static void *
2037 uuid_key(struct hlist_node *hnode)
2038 {
2039         struct obd_export *exp;
2040
2041         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2042
2043         return &exp->exp_client_uuid;
2044 }
2045
2046 /*
2047  * NOTE: It is impossible to find an export that is in failed
2048  *       state with this function
2049  */
2050 static int
2051 uuid_keycmp(const void *key, struct hlist_node *hnode)
2052 {
2053         struct obd_export *exp;
2054
2055         LASSERT(key);
2056         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2057
2058         return obd_uuid_equals(key, &exp->exp_client_uuid) &&
2059                !exp->exp_failed;
2060 }
2061
2062 static void *
2063 uuid_export_object(struct hlist_node *hnode)
2064 {
2065         return hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2066 }
2067
2068 static void
2069 uuid_export_get(cfs_hash_t *hs, struct hlist_node *hnode)
2070 {
2071         struct obd_export *exp;
2072
2073         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2074         class_export_get(exp);
2075 }
2076
2077 static void
2078 uuid_export_put_locked(cfs_hash_t *hs, struct hlist_node *hnode)
2079 {
2080         struct obd_export *exp;
2081
2082         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2083         class_export_put(exp);
2084 }
2085
2086 static cfs_hash_ops_t uuid_hash_ops = {
2087         .hs_hash        = uuid_hash,
2088         .hs_key         = uuid_key,
2089         .hs_keycmp      = uuid_keycmp,
2090         .hs_object      = uuid_export_object,
2091         .hs_get         = uuid_export_get,
2092         .hs_put_locked  = uuid_export_put_locked,
2093 };
2094
2095
2096 /*
2097  * nid<->export hash operations
2098  */
2099
2100 static unsigned
2101 nid_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2102 {
2103         return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
2104 }
2105
2106 static void *
2107 nid_key(struct hlist_node *hnode)
2108 {
2109         struct obd_export *exp;
2110
2111         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2112
2113         RETURN(&exp->exp_connection->c_peer.nid);
2114 }
2115
2116 /*
2117  * NOTE: It is impossible to find an export that is in failed
2118  *       state with this function
2119  */
2120 static int
2121 nid_kepcmp(const void *key, struct hlist_node *hnode)
2122 {
2123         struct obd_export *exp;
2124
2125         LASSERT(key);
2126         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2127
2128         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
2129                !exp->exp_failed);
2130 }
2131
2132 static void *
2133 nid_export_object(struct hlist_node *hnode)
2134 {
2135         return hlist_entry(hnode, struct obd_export, exp_nid_hash);
2136 }
2137
2138 static void
2139 nid_export_get(cfs_hash_t *hs, struct hlist_node *hnode)
2140 {
2141         struct obd_export *exp;
2142
2143         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2144         class_export_get(exp);
2145 }
2146
2147 static void
2148 nid_export_put_locked(cfs_hash_t *hs, struct hlist_node *hnode)
2149 {
2150         struct obd_export *exp;
2151
2152         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2153         class_export_put(exp);
2154 }
2155
2156 static cfs_hash_ops_t nid_hash_ops = {
2157         .hs_hash        = nid_hash,
2158         .hs_key         = nid_key,
2159         .hs_keycmp      = nid_kepcmp,
2160         .hs_object      = nid_export_object,
2161         .hs_get         = nid_export_get,
2162         .hs_put_locked  = nid_export_put_locked,
2163 };
2164
2165
2166 /*
2167  * nid<->nidstats hash operations
2168  */
2169
2170 static void *
2171 nidstats_key(struct hlist_node *hnode)
2172 {
2173         struct nid_stat *ns;
2174
2175         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2176
2177         return &ns->nid;
2178 }
2179
2180 static int
2181 nidstats_keycmp(const void *key, struct hlist_node *hnode)
2182 {
2183         return *(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key;
2184 }
2185
2186 static void *
2187 nidstats_object(struct hlist_node *hnode)
2188 {
2189         return hlist_entry(hnode, struct nid_stat, nid_hash);
2190 }
2191
2192 static void
2193 nidstats_get(cfs_hash_t *hs, struct hlist_node *hnode)
2194 {
2195         struct nid_stat *ns;
2196
2197         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2198         nidstat_getref(ns);
2199 }
2200
2201 static void
2202 nidstats_put_locked(cfs_hash_t *hs, struct hlist_node *hnode)
2203 {
2204         struct nid_stat *ns;
2205
2206         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2207         nidstat_putref(ns);
2208 }
2209
2210 static cfs_hash_ops_t nid_stat_hash_ops = {
2211         .hs_hash        = nid_hash,
2212         .hs_key         = nidstats_key,
2213         .hs_keycmp      = nidstats_keycmp,
2214         .hs_object      = nidstats_object,
2215         .hs_get         = nidstats_get,
2216         .hs_put_locked  = nidstats_put_locked,
2217 };