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