lustre/obdclass/obd_config.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/obdclass/obd_config.c
  37  *
  38  * Config API
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_CLASS
  42 #ifdef __KERNEL__
  43 #include <obd_class.h>
  44 #include <linux/string.h>
  45 #include <lustre_disk.h>
  46 #else
  47 #include <liblustre.h>
  48 #include <string.h>
  49 #include <obd_class.h>
  50 #include <obd.h>
  51 #endif
  52 #include <lustre_ioctl.h>
  53 #include <lustre_log.h>
  54 #include <lprocfs_status.h>
  55 #include <lustre_param.h>
  56
  57 #include "llog_internal.h"
  58
  59 static cfs_hash_ops_t uuid_hash_ops;
  60 static cfs_hash_ops_t nid_hash_ops;
  61 static cfs_hash_ops_t nid_stat_hash_ops;
  62
  63 /*********** string parsing utils *********/
  64
  65 /* returns 0 if we find this key in the buffer, else 1 */
  66 int class_find_param(char *buf, char *key, char **valp)
  67 {
  68         char *ptr;
  69
  70         if (!buf)
  71                 return 1;
  72
  73         if ((ptr = strstr(buf, key)) == NULL)
  74                 return 1;
  75
  76         if (valp)
  77                 *valp = ptr + strlen(key);
  78
  79         return 0;
  80 }
  81 EXPORT_SYMBOL(class_find_param);
  82
  83 /**
  84  * Check whether the proc parameter \a param is an old parameter or not from
  85  * the array \a ptr which contains the mapping from old parameters to new ones.
  86  * If it's an old one, then return the pointer to the cfg_interop_param struc-
  87  * ture which contains both the old and new parameters.
  88  *
  89  * \param param                 proc parameter
  90  * \param ptr                   an array which contains the mapping from
  91  *                              old parameters to new ones
  92  *
  93  * \retval valid-pointer        pointer to the cfg_interop_param structure
  94  *                              which contains the old and new parameters
  95  * \retval NULL                 \a param or \a ptr is NULL,
  96  *                              or \a param is not an old parameter
  97  */
  98 struct cfg_interop_param *class_find_old_param(const char *param,
  99                                                struct cfg_interop_param *ptr)
 100 {
 101         char *value = NULL;
 102         int   name_len = 0;
 103
 104         if (param == NULL || ptr == NULL)
 105                 RETURN(NULL);
 106
 107         value = strchr(param, '=');
 108         if (value == NULL)
 109                 name_len = strlen(param);
 110         else
 111                 name_len = value - param;
 112
 113         while (ptr->old_param != NULL) {
 114                 if (strncmp(param, ptr->old_param, name_len) == 0 &&
 115                     name_len == strlen(ptr->old_param))
 116                         RETURN(ptr);
 117                 ptr++;
 118         }
 119
 120         RETURN(NULL);
 121 }
 122 EXPORT_SYMBOL(class_find_old_param);
 123
 124 /**
 125  * Finds a parameter in \a params and copies it to \a copy.
 126  *
 127  * Leading spaces are skipped. Next space or end of string is the
 128  * parameter terminator with the exception that spaces inside single or double
 129  * quotes get included into a parameter. The parameter is copied into \a copy
 130  * which has to be allocated big enough by a caller, quotes are stripped in
 131  * the copy and the copy is terminated by 0.
 132  *
 133  * On return \a params is set to next parameter or to NULL if last
 134  * parameter is returned.
 135  *
 136  * \retval 0 if parameter is returned in \a copy
 137  * \retval 1 otherwise
 138  * \retval -EINVAL if unbalanced quota is found
 139  */
 140 int class_get_next_param(char **params, char *copy)
 141 {
 142         char *q1, *q2, *str;
 143         int len;
 144
 145         str = *params;
 146         while (*str == ' ')
 147                 str++;
 148
 149         if (*str == '\0') {
 150                 *params = NULL;
 151                 return 1;
 152         }
 153
 154         while (1) {
 155                 q1 = strpbrk(str, " '\"");
 156                 if (q1 == NULL) {
 157                         len = strlen(str);
 158                         memcpy(copy, str, len);
 159                         copy[len] = '\0';
 160                         *params = NULL;
 161                         return 0;
 162                 }
 163                 len = q1 - str;
 164                 if (*q1 == ' ') {
 165                         memcpy(copy, str, len);
 166                         copy[len] = '\0';
 167                         *params = str + len;
 168                         return 0;
 169                 }
 170
 171                 memcpy(copy, str, len);
 172                 copy += len;
 173
 174                 /* search for the matching closing quote */
 175                 str = q1 + 1;
 176                 q2 = strchr(str, *q1);
 177                 if (q2 == NULL) {
 178                         CERROR("Unbalanced quota in parameters: \"%s\"\n",
 179                                *params);
 180                         return -EINVAL;
 181                 }
 182                 len = q2 - str;
 183                 memcpy(copy, str, len);
 184                 copy += len;
 185                 str = q2 + 1;
 186         }
 187         return 1;
 188 }
 189 EXPORT_SYMBOL(class_get_next_param);
 190
 191 /* returns 0 if this is the first key in the buffer, else 1.
 192    valp points to first char after key. */
 193 int class_match_param(char *buf, char *key, char **valp)
 194 {
 195         if (!buf)
 196                 return 1;
 197
 198         if (memcmp(buf, key, strlen(key)) != 0)
 199                 return 1;
 200
 201         if (valp)
 202                 *valp = buf + strlen(key);
 203
 204         return 0;
 205 }
 206 EXPORT_SYMBOL(class_match_param);
 207
 208 static int parse_nid(char *buf, void *value, int quiet)
 209 {
 210         lnet_nid_t *nid = (lnet_nid_t *)value;
 211
 212         *nid = libcfs_str2nid(buf);
 213         if (*nid != LNET_NID_ANY)
 214                 return 0;
 215
 216         if (!quiet)
 217                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
 218         return -EINVAL;
 219 }
 220
 221 static int parse_net(char *buf, void *value)
 222 {
 223         __u32 *net = (__u32 *)value;
 224
 225         *net = libcfs_str2net(buf);
 226         CDEBUG(D_INFO, "Net %s\n", libcfs_net2str(*net));
 227         return 0;
 228 }
 229
 230 enum {
 231         CLASS_PARSE_NID = 1,
 232         CLASS_PARSE_NET,
 233 };
 234
 235 /* 0 is good nid,
 236    1 not found
 237    < 0 error
 238    endh is set to next separator */
 239 static int class_parse_value(char *buf, int opc, void *value, char **endh,
 240                              int quiet)
 241 {
 242         char *endp;
 243         char  tmp;
 244         int   rc = 0;
 245
 246         if (!buf)
 247                 return 1;
 248         while (*buf == ',' || *buf == ':')
 249                 buf++;
 250         if (*buf == ' ' || *buf == '/' || *buf == '\0')
 251                 return 1;
 252
 253         /* nid separators or end of nids */
 254         endp = strpbrk(buf, ",: /");
 255         if (endp == NULL)
 256                 endp = buf + strlen(buf);
 257
 258         tmp = *endp;
 259         *endp = '\0';
 260         switch (opc) {
 261         default:
 262                 LBUG();
 263         case CLASS_PARSE_NID:
 264                 rc = parse_nid(buf, value, quiet);
 265                 break;
 266         case CLASS_PARSE_NET:
 267                 rc = parse_net(buf, value);
 268                 break;
 269         }
 270         *endp = tmp;
 271         if (rc != 0)
 272                 return rc;
 273         if (endh)
 274                 *endh = endp;
 275         return 0;
 276 }
 277
 278 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
 279 {
 280         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 0);
 281 }
 282 EXPORT_SYMBOL(class_parse_nid);
 283
 284 int class_parse_nid_quiet(char *buf, lnet_nid_t *nid, char **endh)
 285 {
 286         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 1);
 287 }
 288 EXPORT_SYMBOL(class_parse_nid_quiet);
 289
 290 int class_parse_net(char *buf, __u32 *net, char **endh)
 291 {
 292         return class_parse_value(buf, CLASS_PARSE_NET, (void *)net, endh, 0);
 293 }
 294 EXPORT_SYMBOL(class_parse_net);
 295
 296 /* 1 param contains key and match
 297  * 0 param contains key and not match
 298  * -1 param does not contain key
 299  */
 300 int class_match_nid(char *buf, char *key, lnet_nid_t nid)
 301 {
 302         lnet_nid_t tmp;
 303         int   rc = -1;
 304
 305         while (class_find_param(buf, key, &buf) == 0) {
 306                 /* please restrict to the nids pertaining to
 307                  * the specified nids */
 308                 while (class_parse_nid(buf, &tmp, &buf) == 0) {
 309                         if (tmp == nid)
 310                                 return 1;
 311                 }
 312                 rc = 0;
 313         }
 314         return rc;
 315 }
 316 EXPORT_SYMBOL(class_match_nid);
 317
 318 int class_match_net(char *buf, char *key, __u32 net)
 319 {
 320         __u32 tmp;
 321         int   rc = -1;
 322
 323         while (class_find_param(buf, key, &buf) == 0) {
 324                 /* please restrict to the nids pertaining to
 325                  * the specified networks */
 326                 while (class_parse_net(buf, &tmp, &buf) == 0) {
 327                         if (tmp == net)
 328                                 return 1;
 329                 }
 330                 rc = 0;
 331         }
 332         return rc;
 333 }
 334 EXPORT_SYMBOL(class_match_net);
 335
 336 /********************** class fns **********************/
 337
 338 /**
 339  * Create a new obd device and set the type, name and uuid.  If successful,
 340  * the new device can be accessed by either name or uuid.
 341  */
 342 int class_attach(struct lustre_cfg *lcfg)
 343 {
 344         struct obd_device *obd = NULL;
 345         char *typename, *name, *uuid;
 346         int rc, len;
 347         ENTRY;
 348
 349         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 350                 CERROR("No type passed!\n");
 351                 RETURN(-EINVAL);
 352         }
 353         typename = lustre_cfg_string(lcfg, 1);
 354
 355         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
 356                 CERROR("No name passed!\n");
 357                 RETURN(-EINVAL);
 358         }
 359         name = lustre_cfg_string(lcfg, 0);
 360
 361         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
 362                 CERROR("No UUID passed!\n");
 363                 RETURN(-EINVAL);
 364         }
 365         uuid = lustre_cfg_string(lcfg, 2);
 366
 367         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 368                MKSTR(typename), MKSTR(name), MKSTR(uuid));
 369
 370         obd = class_newdev(typename, name);
 371         if (IS_ERR(obd)) {
 372                 /* Already exists or out of obds */
 373                 rc = PTR_ERR(obd);
 374                 obd = NULL;
 375                 CERROR("Cannot create device %s of type %s : %d\n",
 376                        name, typename, rc);
 377                 GOTO(out, rc);
 378         }
 379         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
 380                  name, typename);
 381         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 382                  "obd %p obd_magic %08X != %08X\n",
 383                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 384         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
 385                  "%p obd_name %s != %s\n", obd, obd->obd_name, name);
 386
 387         rwlock_init(&obd->obd_pool_lock);
 388         obd->obd_pool_limit = 0;
 389         obd->obd_pool_slv = 0;
 390
 391         CFS_INIT_LIST_HEAD(&obd->obd_exports);
 392         CFS_INIT_LIST_HEAD(&obd->obd_unlinked_exports);
 393         CFS_INIT_LIST_HEAD(&obd->obd_delayed_exports);
 394         CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
 395         CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
 396         spin_lock_init(&obd->obd_nid_lock);
 397         spin_lock_init(&obd->obd_dev_lock);
 398         mutex_init(&obd->obd_dev_mutex);
 399         spin_lock_init(&obd->obd_osfs_lock);
 400         /* obd->obd_osfs_age must be set to a value in the distant
 401          * past to guarantee a fresh statfs is fetched on mount. */
 402         obd->obd_osfs_age = cfs_time_shift_64(-1000);
 403
 404         /* XXX belongs in setup not attach  */
 405         init_rwsem(&obd->obd_observer_link_sem);
 406         /* recovery data */
 407         cfs_init_timer(&obd->obd_recovery_timer);
 408         spin_lock_init(&obd->obd_recovery_task_lock);
 409         init_waitqueue_head(&obd->obd_next_transno_waitq);
 410         init_waitqueue_head(&obd->obd_evict_inprogress_waitq);
 411         CFS_INIT_LIST_HEAD(&obd->obd_req_replay_queue);
 412         CFS_INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
 413         CFS_INIT_LIST_HEAD(&obd->obd_final_req_queue);
 414         CFS_INIT_LIST_HEAD(&obd->obd_evict_list);
 415         INIT_LIST_HEAD(&obd->obd_lwp_list);
 416
 417         llog_group_init(&obd->obd_olg, FID_SEQ_LLOG);
 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         /* do the attach */
 430         if (OBP(obd, attach)) {
 431                 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
 432                 if (rc)
 433                         GOTO(out, rc = -EINVAL);
 434         }
 435
 436         /* Detach drops this */
 437         spin_lock(&obd->obd_dev_lock);
 438         atomic_set(&obd->obd_refcount, 1);
 439         spin_unlock(&obd->obd_dev_lock);
 440         lu_ref_init(&obd->obd_reference);
 441         lu_ref_add(&obd->obd_reference, "attach", obd);
 442
 443         obd->obd_attached = 1;
 444         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 445                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 446         RETURN(0);
 447  out:
 448         if (obd != NULL) {
 449                 class_release_dev(obd);
 450         }
 451         return rc;
 452 }
 453 EXPORT_SYMBOL(class_attach);
 454
 455 /** Create hashes, self-export, and call type-specific setup.
 456  * Setup is effectively the "start this obd" call.
 457  */
 458 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 459 {
 460         int err = 0;
 461         struct obd_export *exp;
 462         ENTRY;
 463
 464         LASSERT(obd != NULL);
 465         LASSERTF(obd == class_num2obd(obd->obd_minor),
 466                  "obd %p != obd_devs[%d] %p\n",
 467                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 468         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 469                  "obd %p obd_magic %08x != %08x\n",
 470                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 471
 472         /* have we attached a type to this device? */
 473         if (!obd->obd_attached) {
 474                 CERROR("Device %d not attached\n", obd->obd_minor);
 475                 RETURN(-ENODEV);
 476         }
 477
 478         if (obd->obd_set_up) {
 479                 CERROR("Device %d already setup (type %s)\n",
 480                        obd->obd_minor, obd->obd_type->typ_name);
 481                 RETURN(-EEXIST);
 482         }
 483
 484         /* is someone else setting us up right now? (attach inits spinlock) */
 485         spin_lock(&obd->obd_dev_lock);
 486         if (obd->obd_starting) {
 487                 spin_unlock(&obd->obd_dev_lock);
 488                 CERROR("Device %d setup in progress (type %s)\n",
 489                        obd->obd_minor, obd->obd_type->typ_name);
 490                 RETURN(-EEXIST);
 491         }
 492         /* just leave this on forever.  I can't use obd_set_up here because
 493            other fns check that status, and we're not actually set up yet. */
 494         obd->obd_starting = 1;
 495         obd->obd_uuid_hash = NULL;
 496         obd->obd_nid_hash = NULL;
 497         obd->obd_nid_stats_hash = NULL;
 498         spin_unlock(&obd->obd_dev_lock);
 499
 500         /* create an uuid-export lustre hash */
 501         obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
 502                                              HASH_UUID_CUR_BITS,
 503                                              HASH_UUID_MAX_BITS,
 504                                              HASH_UUID_BKT_BITS, 0,
 505                                              CFS_HASH_MIN_THETA,
 506                                              CFS_HASH_MAX_THETA,
 507                                              &uuid_hash_ops, CFS_HASH_DEFAULT);
 508         if (!obd->obd_uuid_hash)
 509                 GOTO(err_hash, err = -ENOMEM);
 510
 511         /* create a nid-export lustre hash */
 512         obd->obd_nid_hash = cfs_hash_create("NID_HASH",
 513                                             HASH_NID_CUR_BITS,
 514                                             HASH_NID_MAX_BITS,
 515                                             HASH_NID_BKT_BITS, 0,
 516                                             CFS_HASH_MIN_THETA,
 517                                             CFS_HASH_MAX_THETA,
 518                                             &nid_hash_ops, CFS_HASH_DEFAULT);
 519         if (!obd->obd_nid_hash)
 520                 GOTO(err_hash, err = -ENOMEM);
 521
 522         /* create a nid-stats lustre hash */
 523         obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
 524                                                   HASH_NID_STATS_CUR_BITS,
 525                                                   HASH_NID_STATS_MAX_BITS,
 526                                                   HASH_NID_STATS_BKT_BITS, 0,
 527                                                   CFS_HASH_MIN_THETA,
 528                                                   CFS_HASH_MAX_THETA,
 529                                                   &nid_stat_hash_ops, CFS_HASH_DEFAULT);
 530         if (!obd->obd_nid_stats_hash)
 531                 GOTO(err_hash, err = -ENOMEM);
 532
 533         exp = class_new_export(obd, &obd->obd_uuid);
 534         if (IS_ERR(exp))
 535                 GOTO(err_hash, err = PTR_ERR(exp));
 536
 537         obd->obd_self_export = exp;
 538         cfs_list_del_init(&exp->exp_obd_chain_timed);
 539         class_export_put(exp);
 540
 541         err = obd_setup(obd, lcfg);
 542         if (err)
 543                 GOTO(err_exp, err);
 544
 545         obd->obd_set_up = 1;
 546
 547         spin_lock(&obd->obd_dev_lock);
 548         /* cleanup drops this */
 549         class_incref(obd, "setup", obd);
 550         spin_unlock(&obd->obd_dev_lock);
 551
 552         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 553                obd->obd_name, obd->obd_uuid.uuid);
 554
 555         RETURN(0);
 556 err_exp:
 557         if (obd->obd_self_export) {
 558                 class_unlink_export(obd->obd_self_export);
 559                 obd->obd_self_export = NULL;
 560         }
 561 err_hash:
 562         if (obd->obd_uuid_hash) {
 563                 cfs_hash_putref(obd->obd_uuid_hash);
 564                 obd->obd_uuid_hash = NULL;
 565         }
 566         if (obd->obd_nid_hash) {
 567                 cfs_hash_putref(obd->obd_nid_hash);
 568                 obd->obd_nid_hash = NULL;
 569         }
 570         if (obd->obd_nid_stats_hash) {
 571                 cfs_hash_putref(obd->obd_nid_stats_hash);
 572                 obd->obd_nid_stats_hash = NULL;
 573         }
 574         obd->obd_starting = 0;
 575         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 576         return err;
 577 }
 578 EXPORT_SYMBOL(class_setup);
 579
 580 /** We have finished using this obd and are ready to destroy it.
 581  * There can be no more references to this obd.
 582  */
 583 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 584 {
 585         ENTRY;
 586
 587         if (obd->obd_set_up) {
 588                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 589                 RETURN(-EBUSY);
 590         }
 591
 592         spin_lock(&obd->obd_dev_lock);
 593         if (!obd->obd_attached) {
 594                 spin_unlock(&obd->obd_dev_lock);
 595                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 596                 RETURN(-ENODEV);
 597         }
 598         obd->obd_attached = 0;
 599         spin_unlock(&obd->obd_dev_lock);
 600
 601         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 602                obd->obd_name, obd->obd_uuid.uuid);
 603
 604         class_decref(obd, "attach", obd);
 605         RETURN(0);
 606 }
 607 EXPORT_SYMBOL(class_detach);
 608
 609 /** Start shutting down the obd.  There may be in-progess ops when
 610  * this is called.  We tell them to start shutting down with a call
 611  * to class_disconnect_exports().
 612  */
 613 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 614 {
 615         int err = 0;
 616         char *flag;
 617         ENTRY;
 618
 619         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 620
 621         if (!obd->obd_set_up) {
 622                 CERROR("Device %d not setup\n", obd->obd_minor);
 623                 RETURN(-ENODEV);
 624         }
 625
 626         spin_lock(&obd->obd_dev_lock);
 627         if (obd->obd_stopping) {
 628                 spin_unlock(&obd->obd_dev_lock);
 629                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 630                 RETURN(-ENODEV);
 631         }
 632         /* Leave this on forever */
 633         obd->obd_stopping = 1;
 634
 635         /* wait for already-arrived-connections to finish. */
 636         while (obd->obd_conn_inprogress > 0) {
 637                 spin_unlock(&obd->obd_dev_lock);
 638
 639                 cond_resched();
 640
 641                 spin_lock(&obd->obd_dev_lock);
 642         }
 643         spin_unlock(&obd->obd_dev_lock);
 644
 645         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 646                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 647                         switch (*flag) {
 648                         case 'F':
 649                                 obd->obd_force = 1;
 650                                 break;
 651                         case 'A':
 652                                 LCONSOLE_WARN("Failing over %s\n",
 653                                               obd->obd_name);
 654                                 obd->obd_fail = 1;
 655                                 obd->obd_no_transno = 1;
 656                                 obd->obd_no_recov = 1;
 657                                 if (OBP(obd, iocontrol)) {
 658                                         obd_iocontrol(OBD_IOC_SYNC,
 659                                                       obd->obd_self_export,
 660                                                       0, NULL, NULL);
 661                                 }
 662                                 break;
 663                         default:
 664                                 CERROR("Unrecognised flag '%c'\n", *flag);
 665                         }
 666         }
 667
 668         LASSERT(obd->obd_self_export);
 669
 670         /* The three references that should be remaining are the
 671          * obd_self_export and the attach and setup references. */
 672         if (atomic_read(&obd->obd_refcount) > 3) {
 673                 /* refcounf - 3 might be the number of real exports
 674                    (excluding self export). But class_incref is called
 675                    by other things as well, so don't count on it. */
 676                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 677                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 678                 dump_exports(obd, 0);
 679                 class_disconnect_exports(obd);
 680         }
 681
 682         /* Precleanup, we must make sure all exports get destroyed. */
 683         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 684         if (err)
 685                 CERROR("Precleanup %s returned %d\n",
 686                        obd->obd_name, err);
 687
 688         /* destroy an uuid-export hash body */
 689         if (obd->obd_uuid_hash) {
 690                 cfs_hash_putref(obd->obd_uuid_hash);
 691                 obd->obd_uuid_hash = NULL;
 692         }
 693
 694         /* destroy a nid-export hash body */
 695         if (obd->obd_nid_hash) {
 696                 cfs_hash_putref(obd->obd_nid_hash);
 697                 obd->obd_nid_hash = NULL;
 698         }
 699
 700         /* destroy a nid-stats hash body */
 701         if (obd->obd_nid_stats_hash) {
 702                 cfs_hash_putref(obd->obd_nid_stats_hash);
 703                 obd->obd_nid_stats_hash = NULL;
 704         }
 705
 706         class_decref(obd, "setup", obd);
 707         obd->obd_set_up = 0;
 708
 709         RETURN(0);
 710 }
 711 EXPORT_SYMBOL(class_cleanup);
 712
 713 struct obd_device *class_incref(struct obd_device *obd,
 714                                 const char *scope, const void *source)
 715 {
 716         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 717         atomic_inc(&obd->obd_refcount);
 718         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 719                atomic_read(&obd->obd_refcount));
 720
 721         return obd;
 722 }
 723 EXPORT_SYMBOL(class_incref);
 724
 725 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 726 {
 727         int err;
 728         int refs;
 729
 730         spin_lock(&obd->obd_dev_lock);
 731         atomic_dec(&obd->obd_refcount);
 732         refs = atomic_read(&obd->obd_refcount);
 733         spin_unlock(&obd->obd_dev_lock);
 734         lu_ref_del(&obd->obd_reference, scope, source);
 735
 736         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 737
 738         if ((refs == 1) && obd->obd_stopping) {
 739                 /* All exports have been destroyed; there should
 740                    be no more in-progress ops by this point.*/
 741
 742                 spin_lock(&obd->obd_self_export->exp_lock);
 743                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
 744                 spin_unlock(&obd->obd_self_export->exp_lock);
 745
 746                 /* note that we'll recurse into class_decref again */
 747                 class_unlink_export(obd->obd_self_export);
 748                 return;
 749         }
 750
 751         if (refs == 0) {
 752                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 753                        obd->obd_name, obd->obd_uuid.uuid);
 754                 LASSERT(!obd->obd_attached);
 755                 if (obd->obd_stopping) {
 756                         /* If we're not stopping, we were never set up */
 757                         err = obd_cleanup(obd);
 758                         if (err)
 759                                 CERROR("Cleanup %s returned %d\n",
 760                                        obd->obd_name, err);
 761                 }
 762                 if (OBP(obd, detach)) {
 763                         err = OBP(obd, detach)(obd);
 764                         if (err)
 765                                 CERROR("Detach returned %d\n", err);
 766                 }
 767                 class_release_dev(obd);
 768         }
 769 }
 770 EXPORT_SYMBOL(class_decref);
 771
 772 /** Add a failover nid location.
 773  * Client obd types contact server obd types using this nid list.
 774  */
 775 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 776 {
 777         struct obd_import *imp;
 778         struct obd_uuid uuid;
 779         int rc;
 780         ENTRY;
 781
 782         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 783             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 784                 CERROR("invalid conn_uuid\n");
 785                 RETURN(-EINVAL);
 786         }
 787         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 788             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 789             strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) &&
 790             strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) &&
 791             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 792                 CERROR("can't add connection on non-client dev\n");
 793                 RETURN(-EINVAL);
 794         }
 795
 796         imp = obd->u.cli.cl_import;
 797         if (!imp) {
 798                 CERROR("try to add conn on immature client dev\n");
 799                 RETURN(-EINVAL);
 800         }
 801
 802         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 803         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 804
 805         RETURN(rc);
 806 }
 807 EXPORT_SYMBOL(class_add_conn);
 808
 809 /** Remove a failover nid location.
 810  */
 811 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 812 {
 813         struct obd_import *imp;
 814         struct obd_uuid uuid;
 815         int rc;
 816         ENTRY;
 817
 818         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 819             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 820                 CERROR("invalid conn_uuid\n");
 821                 RETURN(-EINVAL);
 822         }
 823         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 824             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 825                 CERROR("can't del connection on non-client dev\n");
 826                 RETURN(-EINVAL);
 827         }
 828
 829         imp = obd->u.cli.cl_import;
 830         if (!imp) {
 831                 CERROR("try to del conn on immature client dev\n");
 832                 RETURN(-EINVAL);
 833         }
 834
 835         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 836         rc = obd_del_conn(imp, &uuid);
 837
 838         RETURN(rc);
 839 }
 840
 841 CFS_LIST_HEAD(lustre_profile_list);
 842
 843 struct lustre_profile *class_get_profile(const char * prof)
 844 {
 845         struct lustre_profile *lprof;
 846
 847         ENTRY;
 848         cfs_list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 849                 if (!strcmp(lprof->lp_profile, prof)) {
 850                         RETURN(lprof);
 851                 }
 852         }
 853         RETURN(NULL);
 854 }
 855 EXPORT_SYMBOL(class_get_profile);
 856
 857 /** Create a named "profile".
 858  * This defines the mdc and osc names to use for a client.
 859  * This also is used to define the lov to be used by a mdt.
 860  */
 861 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 862                       int mdclen, char *mdc)
 863 {
 864         struct lustre_profile *lprof;
 865         int err = 0;
 866         ENTRY;
 867
 868         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 869
 870         OBD_ALLOC(lprof, sizeof(*lprof));
 871         if (lprof == NULL)
 872                 RETURN(-ENOMEM);
 873         CFS_INIT_LIST_HEAD(&lprof->lp_list);
 874
 875         LASSERT(proflen == (strlen(prof) + 1));
 876         OBD_ALLOC(lprof->lp_profile, proflen);
 877         if (lprof->lp_profile == NULL)
 878                 GOTO(out, err = -ENOMEM);
 879         memcpy(lprof->lp_profile, prof, proflen);
 880
 881         LASSERT(osclen == (strlen(osc) + 1));
 882         OBD_ALLOC(lprof->lp_dt, osclen);
 883         if (lprof->lp_dt == NULL)
 884                 GOTO(out, err = -ENOMEM);
 885         memcpy(lprof->lp_dt, osc, osclen);
 886
 887         if (mdclen > 0) {
 888                 LASSERT(mdclen == (strlen(mdc) + 1));
 889                 OBD_ALLOC(lprof->lp_md, mdclen);
 890                 if (lprof->lp_md == NULL)
 891                         GOTO(out, err = -ENOMEM);
 892                 memcpy(lprof->lp_md, mdc, mdclen);
 893         }
 894
 895         cfs_list_add(&lprof->lp_list, &lustre_profile_list);
 896         RETURN(err);
 897
 898 out:
 899         if (lprof->lp_md)
 900                 OBD_FREE(lprof->lp_md, mdclen);
 901         if (lprof->lp_dt)
 902                 OBD_FREE(lprof->lp_dt, osclen);
 903         if (lprof->lp_profile)
 904                 OBD_FREE(lprof->lp_profile, proflen);
 905         OBD_FREE(lprof, sizeof(*lprof));
 906         RETURN(err);
 907 }
 908
 909 void class_del_profile(const char *prof)
 910 {
 911         struct lustre_profile *lprof;
 912         ENTRY;
 913
 914         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 915
 916         lprof = class_get_profile(prof);
 917         if (lprof) {
 918                 cfs_list_del(&lprof->lp_list);
 919                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 920                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 921                 if (lprof->lp_md)
 922                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 923                 OBD_FREE(lprof, sizeof *lprof);
 924         }
 925         EXIT;
 926 }
 927 EXPORT_SYMBOL(class_del_profile);
 928
 929 /* COMPAT_146 */
 930 void class_del_profiles(void)
 931 {
 932         struct lustre_profile *lprof, *n;
 933         ENTRY;
 934
 935         cfs_list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 936                 cfs_list_del(&lprof->lp_list);
 937                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 938                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 939                 if (lprof->lp_md)
 940                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 941                 OBD_FREE(lprof, sizeof *lprof);
 942         }
 943         EXIT;
 944 }
 945 EXPORT_SYMBOL(class_del_profiles);
 946
 947 static int class_set_global(char *ptr, int val, struct lustre_cfg *lcfg)
 948 {
 949         ENTRY;
 950         if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
 951                 at_min = val;
 952         else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
 953                 at_max = val;
 954         else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
 955                 at_extra = val;
 956         else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
 957                 at_early_margin = val;
 958         else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
 959                 at_history = val;
 960         else if (class_match_param(ptr, PARAM_JOBID_VAR, NULL) == 0)
 961                 strlcpy(obd_jobid_var, lustre_cfg_string(lcfg, 2),
 962                         JOBSTATS_JOBID_VAR_MAX_LEN + 1);
 963         else
 964                 RETURN(-EINVAL);
 965
 966         CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
 967         RETURN(0);
 968 }
 969
 970
 971 /* We can't call ll_process_config or lquota_process_config directly because
 972  * it lives in a module that must be loaded after this one. */
 973 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
 974 static int (*quota_process_config)(struct lustre_cfg *lcfg) = NULL;
 975
 976 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 977 {
 978         client_process_config = cpc;
 979 }
 980 EXPORT_SYMBOL(lustre_register_client_process_config);
 981
 982 /**
 983  * Rename the proc parameter in \a cfg with a new name \a new_name.
 984  *
 985  * \param cfg      config structure which contains the proc parameter
 986  * \param new_name new name of the proc parameter
 987  *
 988  * \retval valid-pointer    pointer to the newly-allocated config structure
 989  *                          which contains the renamed proc parameter
 990  * \retval ERR_PTR(-EINVAL) if \a cfg or \a new_name is NULL, or \a cfg does
 991  *                          not contain a proc parameter
 992  * \retval ERR_PTR(-ENOMEM) if memory allocation failure occurs
 993  */
 994 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
 995                                      const char *new_name)
 996 {
 997         struct lustre_cfg_bufs  *bufs = NULL;
 998         struct lustre_cfg       *new_cfg = NULL;
 999         char                    *param = NULL;
1000         char                    *new_param = NULL;
1001         char                    *value = NULL;
1002         int                      name_len = 0;
1003         int                      new_len = 0;
1004         ENTRY;
1005
1006         if (cfg == NULL || new_name == NULL)
1007                 RETURN(ERR_PTR(-EINVAL));
1008
1009         param = lustre_cfg_string(cfg, 1);
1010         if (param == NULL)
1011                 RETURN(ERR_PTR(-EINVAL));
1012
1013         value = strchr(param, '=');
1014         if (value == NULL)
1015                 name_len = strlen(param);
1016         else
1017                 name_len = value - param;
1018
1019         new_len = LUSTRE_CFG_BUFLEN(cfg, 1) + strlen(new_name) - name_len;
1020
1021         OBD_ALLOC(new_param, new_len);
1022         if (new_param == NULL)
1023                 RETURN(ERR_PTR(-ENOMEM));
1024
1025         strcpy(new_param, new_name);
1026         if (value != NULL)
1027                 strcat(new_param, value);
1028
1029         OBD_ALLOC_PTR(bufs);
1030         if (bufs == NULL) {
1031                 OBD_FREE(new_param, new_len);
1032                 RETURN(ERR_PTR(-ENOMEM));
1033         }
1034
1035         lustre_cfg_bufs_reset(bufs, NULL);
1036         lustre_cfg_bufs_init(bufs, cfg);
1037         lustre_cfg_bufs_set_string(bufs, 1, new_param);
1038
1039         new_cfg = lustre_cfg_new(cfg->lcfg_command, bufs);
1040
1041         OBD_FREE(new_param, new_len);
1042         OBD_FREE_PTR(bufs);
1043         if (new_cfg == NULL)
1044                 RETURN(ERR_PTR(-ENOMEM));
1045
1046         new_cfg->lcfg_num = cfg->lcfg_num;
1047         new_cfg->lcfg_flags = cfg->lcfg_flags;
1048         new_cfg->lcfg_nid = cfg->lcfg_nid;
1049         new_cfg->lcfg_nal = cfg->lcfg_nal;
1050
1051         RETURN(new_cfg);
1052 }
1053 EXPORT_SYMBOL(lustre_cfg_rename);
1054
1055 static int process_param2_config(struct lustre_cfg *lcfg)
1056 {
1057         char *param = lustre_cfg_string(lcfg, 1);
1058         char *upcall = lustre_cfg_string(lcfg, 2);
1059         char *argv[] = {
1060                 [0] = "/usr/sbin/lctl",
1061                 [1] = "set_param",
1062                 [2] = param,
1063                 [3] = NULL
1064         };
1065         struct timeval  start;
1066         struct timeval  end;
1067         int             rc;
1068         ENTRY;
1069
1070         /* Add upcall processing here. Now only lctl is supported */
1071         if (strcmp(upcall, LCTL_UPCALL) != 0) {
1072                 CERROR("Unsupported upcall %s\n", upcall);
1073                 RETURN(-EINVAL);
1074         }
1075
1076         do_gettimeofday(&start);
1077         rc = call_usermodehelper(argv[0], argv, NULL, 0);
1078         do_gettimeofday(&end);
1079
1080         if (rc < 0) {
1081                 CERROR("lctl: error invoking upcall %s %s %s: rc = %d; "
1082                        "time %ldus\n", argv[0], argv[1], argv[2], rc,
1083                        cfs_timeval_sub(&end, &start, NULL));
1084         } else {
1085                 CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
1086                        argv[0], argv[1], argv[2],
1087                        cfs_timeval_sub(&end, &start, NULL));
1088                        rc = 0;
1089         }
1090
1091         RETURN(rc);
1092 }
1093
1094 void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
1095 {
1096         quota_process_config = qpc;
1097 }
1098 EXPORT_SYMBOL(lustre_register_quota_process_config);
1099
1100 /** Process configuration commands given in lustre_cfg form.
1101  * These may come from direct calls (e.g. class_manual_cleanup)
1102  * or processing the config llog, or ioctl from lctl.
1103  */
1104 int class_process_config(struct lustre_cfg *lcfg)
1105 {
1106         struct obd_device *obd;
1107         int err;
1108
1109         LASSERT(lcfg && !IS_ERR(lcfg));
1110         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
1111
1112         /* Commands that don't need a device */
1113         switch(lcfg->lcfg_command) {
1114         case LCFG_ATTACH: {
1115                 err = class_attach(lcfg);
1116                 GOTO(out, err);
1117         }
1118         case LCFG_ADD_UUID: {
1119                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
1120                        " (%s)\n", lustre_cfg_string(lcfg, 1),
1121                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
1122
1123                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
1124                 GOTO(out, err);
1125         }
1126         case LCFG_DEL_UUID: {
1127                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
1128                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
1129                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
1130
1131                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
1132                 GOTO(out, err);
1133         }
1134         case LCFG_MOUNTOPT: {
1135                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
1136                        lustre_cfg_string(lcfg, 1),
1137                        lustre_cfg_string(lcfg, 2),
1138                        lustre_cfg_string(lcfg, 3));
1139                 /* set these mount options somewhere, so ll_fill_super
1140                  * can find them. */
1141                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
1142                                         lustre_cfg_string(lcfg, 1),
1143                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
1144                                         lustre_cfg_string(lcfg, 2),
1145                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
1146                                         lustre_cfg_string(lcfg, 3));
1147                 GOTO(out, err);
1148         }
1149         case LCFG_DEL_MOUNTOPT: {
1150                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
1151                        lustre_cfg_string(lcfg, 1));
1152                 class_del_profile(lustre_cfg_string(lcfg, 1));
1153                 GOTO(out, err = 0);
1154         }
1155         case LCFG_SET_TIMEOUT: {
1156                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
1157                        obd_timeout, lcfg->lcfg_num);
1158                 obd_timeout = max(lcfg->lcfg_num, 1U);
1159                 obd_timeout_set = 1;
1160                 GOTO(out, err = 0);
1161         }
1162         case LCFG_SET_LDLM_TIMEOUT: {
1163                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
1164                        ldlm_timeout, lcfg->lcfg_num);
1165                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
1166                 if (ldlm_timeout >= obd_timeout)
1167                         ldlm_timeout = max(obd_timeout / 3, 1U);
1168                 ldlm_timeout_set = 1;
1169                 GOTO(out, err = 0);
1170         }
1171         case LCFG_SET_UPCALL: {
1172                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
1173                 /* COMPAT_146 Don't fail on old configs */
1174                 GOTO(out, err = 0);
1175         }
1176         case LCFG_MARKER: {
1177                 struct cfg_marker *marker;
1178                 marker = lustre_cfg_buf(lcfg, 1);
1179                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
1180                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
1181                 GOTO(out, err = 0);
1182         }
1183         case LCFG_PARAM: {
1184                 char *tmp;
1185                 /* llite has no obd */
1186                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
1187                                        PARAM_LLITE, 0) == 0) &&
1188                     client_process_config) {
1189                         err = (*client_process_config)(lcfg);
1190                         GOTO(out, err);
1191                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1192                                               PARAM_SYS, &tmp) == 0)) {
1193                         /* Global param settings */
1194                         err = class_set_global(tmp, lcfg->lcfg_num, lcfg);
1195                         /*
1196                          * Client or server should not fail to mount if
1197                          * it hits an unknown configuration parameter.
1198                          */
1199                         if (err != 0)
1200                                 CWARN("Ignoring unknown param %s\n", tmp);
1201
1202                         GOTO(out, err = 0);
1203                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1204                                               PARAM_QUOTA, &tmp) == 0) &&
1205                            quota_process_config) {
1206                         err = (*quota_process_config)(lcfg);
1207                         GOTO(out, err);
1208                 }
1209
1210                 break;
1211         }
1212         case LCFG_SET_PARAM: {
1213                 err = process_param2_config(lcfg);
1214                 GOTO(out, err = 0);
1215         }
1216         }
1217         /* Commands that require a device */
1218         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1219         if (obd == NULL) {
1220                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
1221                         CERROR("this lcfg command requires a device name\n");
1222                 else
1223                         CERROR("no device for: %s\n",
1224                                lustre_cfg_string(lcfg, 0));
1225
1226                 GOTO(out, err = -EINVAL);
1227         }
1228
1229         switch(lcfg->lcfg_command) {
1230         case LCFG_SETUP: {
1231                 err = class_setup(obd, lcfg);
1232                 GOTO(out, err);
1233         }
1234         case LCFG_DETACH: {
1235                 err = class_detach(obd, lcfg);
1236                 GOTO(out, err = 0);
1237         }
1238         case LCFG_CLEANUP: {
1239                 err = class_cleanup(obd, lcfg);
1240                 GOTO(out, err = 0);
1241         }
1242         case LCFG_ADD_CONN: {
1243                 err = class_add_conn(obd, lcfg);
1244                 GOTO(out, err = 0);
1245         }
1246         case LCFG_DEL_CONN: {
1247                 err = class_del_conn(obd, lcfg);
1248                 GOTO(out, err = 0);
1249         }
1250         case LCFG_POOL_NEW: {
1251                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
1252                 GOTO(out, err = 0);
1253         }
1254         case LCFG_POOL_ADD: {
1255                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1256                                    lustre_cfg_string(lcfg, 3));
1257                 GOTO(out, err = 0);
1258         }
1259         case LCFG_POOL_REM: {
1260                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1261                                    lustre_cfg_string(lcfg, 3));
1262                 GOTO(out, err = 0);
1263         }
1264         case LCFG_POOL_DEL: {
1265                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
1266                 GOTO(out, err = 0);
1267         }
1268         default: {
1269                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
1270                 GOTO(out, err);
1271
1272         }
1273         }
1274 out:
1275         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
1276                 CWARN("Ignoring error %d on optional command %#x\n", err,
1277                       lcfg->lcfg_command);
1278                 err = 0;
1279         }
1280         return err;
1281 }
1282 EXPORT_SYMBOL(class_process_config);
1283
1284 #ifndef HAVE_ONLY_PROCFS_SEQ
1285 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
1286                              struct lustre_cfg *lcfg, void *data)
1287 {
1288 #ifdef __KERNEL__
1289         struct lprocfs_vars *var;
1290         char *key, *sval;
1291         int i, keylen, vallen;
1292         int matched = 0, j = 0;
1293         int rc = 0;
1294         int skip = 0;
1295         ENTRY;
1296
1297         if (lcfg->lcfg_command != LCFG_PARAM) {
1298                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1299                 RETURN(-EINVAL);
1300         }
1301
1302         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1303            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1304            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1305         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1306                 key = lustre_cfg_buf(lcfg, i);
1307                 /* Strip off prefix */
1308                 if (class_match_param(key, prefix, &key))
1309                         /* If the prefix doesn't match, return error so we
1310                          * can pass it down the stack */
1311                         RETURN(-ENOSYS);
1312                 sval = strchr(key, '=');
1313                 if (!sval || (*(sval + 1) == 0)) {
1314                         CERROR("Can't parse param %s (missing '=')\n", key);
1315                         /* rc = -EINVAL;        continue parsing other params */
1316                         continue;
1317                 }
1318                 keylen = sval - key;
1319                 sval++;
1320                 vallen = strlen(sval);
1321                 matched = 0;
1322                 j = 0;
1323                 /* Search proc entries */
1324                 while (lvars[j].name) {
1325                         var = &lvars[j];
1326                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1327                             keylen == strlen(var->name)) {
1328                                 matched++;
1329                                 rc = -EROFS;
1330
1331                                 if (var->write_fptr) {
1332                                         mm_segment_t oldfs;
1333                                         oldfs = get_fs();
1334                                         set_fs(KERNEL_DS);
1335                                         rc = (var->write_fptr)(NULL, sval,
1336                                                                 vallen, data);
1337                                         set_fs(oldfs);
1338                                 }
1339                                 break;
1340                         }
1341                         j++;
1342                 }
1343                 if (!matched) {
1344                         CERROR("%.*s: %s unknown param %s\n",
1345                                (int)strlen(prefix) - 1, prefix,
1346                                (char *)lustre_cfg_string(lcfg, 0), key);
1347                         /* rc = -EINVAL;        continue parsing other params */
1348                         skip++;
1349                 } else if (rc < 0) {
1350                         CERROR("%s: error writing proc entry '%s': rc = %d\n",
1351                                prefix, var->name, rc);
1352                         rc = 0;
1353                 } else {
1354                         CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1355                                          lustre_cfg_string(lcfg, 0),
1356                                          (int)strlen(prefix) - 1, prefix,
1357                                          (int)(sval - key - 1), key, sval);
1358                 }
1359         }
1360
1361         if (rc > 0)
1362                 rc = 0;
1363         if (!rc && skip)
1364                 rc = skip;
1365         RETURN(rc);
1366 #else
1367         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1368         /* Don't throw config error */
1369         RETURN(0);
1370 #endif
1371 }
1372 EXPORT_SYMBOL(class_process_proc_param);
1373 #endif
1374
1375 int class_process_proc_seq_param(char *prefix, struct lprocfs_seq_vars *lvars,
1376                                  struct lustre_cfg *lcfg, void *data)
1377 {
1378 #ifdef __KERNEL__
1379         struct lprocfs_seq_vars *var;
1380         struct file fakefile;
1381         struct seq_file fake_seqfile;
1382         char *key, *sval;
1383         int i, keylen, vallen;
1384         int matched = 0, j = 0;
1385         int rc = 0;
1386         int skip = 0;
1387         ENTRY;
1388
1389         if (lcfg->lcfg_command != LCFG_PARAM) {
1390                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1391                 RETURN(-EINVAL);
1392         }
1393
1394         /* fake a seq file so that var->fops->write can work... */
1395         fakefile.private_data = &fake_seqfile;
1396         fake_seqfile.private = data;
1397         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1398            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1399            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1400         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1401                 key = lustre_cfg_buf(lcfg, i);
1402                 /* Strip off prefix */
1403                 if (class_match_param(key, prefix, &key))
1404                         /* If the prefix doesn't match, return error so we
1405                          * can pass it down the stack */
1406                         RETURN(-ENOSYS);
1407                 sval = strchr(key, '=');
1408                 if (!sval || (*(sval + 1) == 0)) {
1409                         CERROR("Can't parse param %s (missing '=')\n", key);
1410                         /* rc = -EINVAL;        continue parsing other params */
1411                         continue;
1412                 }
1413                 keylen = sval - key;
1414                 sval++;
1415                 vallen = strlen(sval);
1416                 matched = 0;
1417                 j = 0;
1418                 /* Search proc entries */
1419                 while (lvars[j].name) {
1420                         var = &lvars[j];
1421                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1422                             keylen == strlen(var->name)) {
1423                                 matched++;
1424                                 rc = -EROFS;
1425
1426                                 if (var->fops && var->fops->write) {
1427                                         mm_segment_t oldfs;
1428                                         oldfs = get_fs();
1429                                         set_fs(KERNEL_DS);
1430                                         rc = (var->fops->write)(&fakefile, sval,
1431                                                                 vallen, NULL);
1432                                         set_fs(oldfs);
1433                                 }
1434                                 break;
1435                         }
1436                         j++;
1437                 }
1438                 if (!matched) {
1439                         CERROR("%.*s: %s unknown param %s\n",
1440                                (int)strlen(prefix) - 1, prefix,
1441                                (char *)lustre_cfg_string(lcfg, 0), key);
1442                         /* rc = -EINVAL;        continue parsing other params */
1443                         skip++;
1444                 } else if (rc < 0) {
1445                         CERROR("%s: error writing proc entry '%s': rc = %d\n",
1446                                prefix, var->name, rc);
1447                         rc = 0;
1448                 } else {
1449                         CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1450                                          lustre_cfg_string(lcfg, 0),
1451                                          (int)strlen(prefix) - 1, prefix,
1452                                          (int)(sval - key - 1), key, sval);
1453                 }
1454         }
1455
1456         if (rc > 0)
1457                 rc = 0;
1458         if (!rc && skip)
1459                 rc = skip;
1460         RETURN(rc);
1461 #else
1462         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1463         /* Don't throw config error */
1464         RETURN(0);
1465 #endif
1466 }
1467 EXPORT_SYMBOL(class_process_proc_seq_param);
1468
1469 #ifdef __KERNEL__
1470 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1471 #else
1472 #define lustre_check_exclusion(a,b)  0
1473 #endif
1474
1475 /** Parse a configuration llog, doing various manipulations on them
1476  * for various reasons, (modifications for compatibility, skip obsolete
1477  * records, change uuids, etc), then class_process_config() resulting
1478  * net records.
1479  */
1480 int class_config_llog_handler(const struct lu_env *env,
1481                               struct llog_handle *handle,
1482                               struct llog_rec_hdr *rec, void *data)
1483 {
1484         struct config_llog_instance *clli = data;
1485         int cfg_len = rec->lrh_len;
1486         char *cfg_buf = (char*) (rec + 1);
1487         int rc = 0;
1488         ENTRY;
1489
1490         //class_config_dump_handler(handle, rec, data);
1491
1492         switch (rec->lrh_type) {
1493         case OBD_CFG_REC: {
1494                 struct lustre_cfg *lcfg, *lcfg_new;
1495                 struct lustre_cfg_bufs bufs;
1496                 char *inst_name = NULL;
1497                 int inst_len = 0;
1498                 int inst = 0, swab = 0;
1499
1500                 lcfg = (struct lustre_cfg *)cfg_buf;
1501                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1502                         lustre_swab_lustre_cfg(lcfg);
1503                         swab = 1;
1504                 }
1505
1506                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1507                 if (rc)
1508                         GOTO(out, rc);
1509
1510                 /* Figure out config state info */
1511                 if (lcfg->lcfg_command == LCFG_MARKER) {
1512                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1513                         lustre_swab_cfg_marker(marker, swab,
1514                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1515                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1516                                clli->cfg_flags, marker->cm_flags);
1517                         if (marker->cm_flags & CM_START) {
1518                                 /* all previous flags off */
1519                                 clli->cfg_flags = CFG_F_MARKER;
1520                                 server_name2index(marker->cm_tgtname,
1521                                                   &clli->cfg_lwp_idx, NULL);
1522                                 if (marker->cm_flags & CM_SKIP) {
1523                                         clli->cfg_flags |= CFG_F_SKIP;
1524                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1525                                                marker->cm_step);
1526                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1527                                            (clli->cfg_sb &&
1528                                             lustre_check_exclusion(clli->cfg_sb,
1529                                                          marker->cm_tgtname))) {
1530                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1531                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1532                                                marker->cm_step);
1533                                 }
1534                         } else if (marker->cm_flags & CM_END) {
1535                                 clli->cfg_flags = 0;
1536                         }
1537                 }
1538                 /* A config command without a start marker before it is
1539                    illegal (post 146) */
1540                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1541                     !(clli->cfg_flags & CFG_F_MARKER) &&
1542                     (lcfg->lcfg_command != LCFG_MARKER)) {
1543                         CWARN("Config not inside markers, ignoring! "
1544                               "(inst: %p, uuid: %s, flags: %#x)\n",
1545                               clli->cfg_instance,
1546                               clli->cfg_uuid.uuid, clli->cfg_flags);
1547                         clli->cfg_flags |= CFG_F_SKIP;
1548                 }
1549                 if (clli->cfg_flags & CFG_F_SKIP) {
1550                         CDEBUG(D_CONFIG, "skipping %#x\n",
1551                                clli->cfg_flags);
1552                         rc = 0;
1553                         /* No processing! */
1554                         break;
1555                 }
1556
1557                 /*
1558                  * For interoperability between 1.8 and 2.0,
1559                  * rename "mds" obd device type to "mdt".
1560                  */
1561                 {
1562                         char *typename = lustre_cfg_string(lcfg, 1);
1563                         char *index = lustre_cfg_string(lcfg, 2);
1564
1565                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1566                              strcmp(typename, "mds") == 0)) {
1567                                 CWARN("For 1.8 interoperability, rename obd "
1568                                        "type from mds to mdt\n");
1569                                 typename[2] = 't';
1570                         }
1571                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1572                              strcmp(index, "type") == 0)) {
1573                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1574                                        "set this index to '0'\n");
1575                                 index[0] = '0';
1576                                 index[1] = 0;
1577                         }
1578                 }
1579
1580 #if defined(HAVE_SERVER_SUPPORT) && defined(__KERNEL__)
1581                 /* newer MDS replaces LOV/OSC with LOD/OSP */
1582                 {
1583                         char *typename = lustre_cfg_string(lcfg, 1);
1584
1585                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1586                             strcmp(typename, LUSTRE_LOV_NAME) == 0) &&
1587                             IS_MDT(s2lsi(clli->cfg_sb))) {
1588                                 CDEBUG(D_CONFIG,
1589                                        "For 2.x interoperability, rename obd "
1590                                        "type from lov to lod (%s)\n",
1591                                        s2lsi(clli->cfg_sb)->lsi_svname);
1592                                 strcpy(typename, LUSTRE_LOD_NAME);
1593                         }
1594                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1595                             strcmp(typename, LUSTRE_OSC_NAME) == 0) &&
1596                             IS_MDT(s2lsi(clli->cfg_sb))) {
1597                                 CDEBUG(D_CONFIG,
1598                                        "For 2.x interoperability, rename obd "
1599                                        "type from osc to osp (%s)\n",
1600                                        s2lsi(clli->cfg_sb)->lsi_svname);
1601                                 strcpy(typename, LUSTRE_OSP_NAME);
1602                         }
1603                 }
1604 #endif
1605
1606                 if (clli->cfg_flags & CFG_F_EXCLUDE) {
1607                         CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
1608                                lcfg->lcfg_command);
1609                         if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
1610                                 /* Add inactive instead */
1611                                 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1612                 }
1613
1614                 lustre_cfg_bufs_init(&bufs, lcfg);
1615
1616                 if (clli && clli->cfg_instance &&
1617                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1618                         inst = 1;
1619                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1620                                    sizeof(clli->cfg_instance) * 2 + 4;
1621                         OBD_ALLOC(inst_name, inst_len);
1622                         if (inst_name == NULL)
1623                                 GOTO(out, rc = -ENOMEM);
1624                         sprintf(inst_name, "%s-%p",
1625                                 lustre_cfg_string(lcfg, 0),
1626                                 clli->cfg_instance);
1627                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1628                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1629                                lcfg->lcfg_command, inst_name);
1630                 }
1631
1632                 /* we override the llog's uuid for clients, to insure they
1633                 are unique */
1634                 if (clli && clli->cfg_instance != NULL &&
1635                     lcfg->lcfg_command == LCFG_ATTACH) {
1636                         lustre_cfg_bufs_set_string(&bufs, 2,
1637                                                    clli->cfg_uuid.uuid);
1638                 }
1639                 /*
1640                  * sptlrpc config record, we expect 2 data segments:
1641                  *  [0]: fs_name/target_name,
1642                  *  [1]: rule string
1643                  * moving them to index [1] and [2], and insert MGC's
1644                  * obdname at index [0].
1645                  */
1646                 if (clli && clli->cfg_instance == NULL &&
1647                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1648                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1649                                             bufs.lcfg_buflen[1]);
1650                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1651                                             bufs.lcfg_buflen[0]);
1652                         lustre_cfg_bufs_set_string(&bufs, 0,
1653                                                    clli->cfg_obdname);
1654                 }
1655
1656                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1657
1658                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1659                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1660
1661                 /* XXX Hack to try to remain binary compatible with
1662                  * pre-newconfig logs */
1663                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1664                     (lcfg->lcfg_nid >> 32) == 0) {
1665                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1666
1667                         lcfg_new->lcfg_nid =
1668                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1669                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1670                               lcfg->lcfg_nal, addr,
1671                               libcfs_nid2str(lcfg_new->lcfg_nid));
1672                 } else {
1673                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1674                 }
1675
1676                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1677
1678                 rc = class_process_config(lcfg_new);
1679                 lustre_cfg_free(lcfg_new);
1680
1681                 if (inst)
1682                         OBD_FREE(inst_name, inst_len);
1683                 break;
1684         }
1685         default:
1686                 CERROR("Unknown llog record type %#x encountered\n",
1687                        rec->lrh_type);
1688                 break;
1689         }
1690 out:
1691         if (rc) {
1692                 CERROR("%s: cfg command failed: rc = %d\n",
1693                        handle->lgh_ctxt->loc_obd->obd_name, rc);
1694                 class_config_dump_handler(NULL, handle, rec, data);
1695         }
1696         RETURN(rc);
1697 }
1698 EXPORT_SYMBOL(class_config_llog_handler);
1699
1700 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1701                             char *name, struct config_llog_instance *cfg)
1702 {
1703         struct llog_process_cat_data     cd = {0, 0};
1704         struct llog_handle              *llh;
1705         llog_cb_t                        callback;
1706         int                              rc;
1707         ENTRY;
1708
1709         CDEBUG(D_INFO, "looking up llog %s\n", name);
1710         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1711         if (rc)
1712                 RETURN(rc);
1713
1714         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1715         if (rc)
1716                 GOTO(parse_out, rc);
1717
1718         /* continue processing from where we last stopped to end-of-log */
1719         if (cfg) {
1720                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1721                 callback = cfg->cfg_callback;
1722                 LASSERT(callback != NULL);
1723         } else {
1724                 callback = class_config_llog_handler;
1725         }
1726
1727         cd.lpcd_last_idx = 0;
1728
1729         rc = llog_process(env, llh, callback, cfg, &cd);
1730
1731         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1732                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1733         if (cfg)
1734                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1735
1736 parse_out:
1737         llog_close(env, llh);
1738         RETURN(rc);
1739 }
1740 EXPORT_SYMBOL(class_config_parse_llog);
1741
1742 struct lcfg_type_data {
1743         __u32    ltd_type;
1744         char    *ltd_name;
1745         char    *ltd_bufs[4];
1746 } lcfg_data_table[] = {
1747         { LCFG_ATTACH, "attach", { "type", "UUID", "3", "4" } },
1748         { LCFG_DETACH, "detach", { "1", "2", "3", "4" } },
1749         { LCFG_SETUP, "setup", { "UUID", "node", "options", "failout" } },
1750         { LCFG_CLEANUP, "cleanup", { "1", "2", "3", "4" } },
1751         { LCFG_ADD_UUID, "add_uuid", { "node", "2", "3", "4" }  },
1752         { LCFG_DEL_UUID, "del_uuid", { "1", "2", "3", "4" }  },
1753         { LCFG_MOUNTOPT, "new_profile", { "name", "lov", "lmv", "4" }  },
1754         { LCFG_DEL_MOUNTOPT, "del_mountopt", { "1", "2", "3", "4" } , },
1755         { LCFG_SET_TIMEOUT, "set_timeout", { "parameter", "2", "3", "4" }  },
1756         { LCFG_SET_UPCALL, "set_upcall", { "1", "2", "3", "4" }  },
1757         { LCFG_ADD_CONN, "add_conn", { "node", "2", "3", "4" }  },
1758         { LCFG_DEL_CONN, "del_conn", { "1", "2", "3", "4" }  },
1759         { LCFG_LOV_ADD_OBD, "add_osc", { "ost", "index", "gen", "UUID" } },
1760         { LCFG_LOV_DEL_OBD, "del_osc", { "1", "2", "3", "4" } },
1761         { LCFG_PARAM, "set_param", { "parameter", "value", "3", "4" } },
1762         { LCFG_MARKER, "marker", { "1", "2", "3", "4" } },
1763         { LCFG_LOG_START, "log_start", { "1", "2", "3", "4" } },
1764         { LCFG_LOG_END, "log_end", { "1", "2", "3", "4" } },
1765         { LCFG_LOV_ADD_INA, "add_osc_inactive", { "1", "2", "3", "4" }  },
1766         { LCFG_ADD_MDC, "add_mdc", { "mdt", "index", "gen", "UUID" } },
1767         { LCFG_DEL_MDC, "del_mdc", { "1", "2", "3", "4" } },
1768         { LCFG_SPTLRPC_CONF, "security", { "parameter", "2", "3", "4" } },
1769         { LCFG_POOL_NEW, "new_pool", { "fsname", "pool", "3", "4" }  },
1770         { LCFG_POOL_ADD, "add_pool", { "fsname", "pool", "ost", "4" } },
1771         { LCFG_POOL_REM, "remove_pool", { "fsname", "pool", "ost", "4" } },
1772         { LCFG_POOL_DEL, "del_pool", { "fsname", "pool", "3", "4" } },
1773         { LCFG_SET_LDLM_TIMEOUT, "set_ldlm_timeout",
1774           { "parameter", "2", "3", "4" } },
1775         { 0, NULL, { NULL, NULL, NULL, NULL } }
1776 };
1777
1778 static struct lcfg_type_data *lcfg_cmd2data(__u32 cmd)
1779 {
1780         int i = 0;
1781
1782         while (lcfg_data_table[i].ltd_type != 0) {
1783                 if (lcfg_data_table[i].ltd_type == cmd)
1784                         return &lcfg_data_table[i];
1785                 i++;
1786         }
1787         return NULL;
1788 }
1789
1790 /**
1791  * parse config record and output dump in supplied buffer.
1792  * This is separated from class_config_dump_handler() to use
1793  * for ioctl needs as well
1794  *
1795  * Sample Output:
1796  * - { event: attach, device: lustrewt-clilov, type: lov, UUID:
1797  *     lustrewt-clilov_UUID }
1798  */
1799 int class_config_yaml_output(struct llog_rec_hdr *rec, char *buf, int size)
1800 {
1801         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1802         char                    *ptr = buf;
1803         char                    *end = buf + size;
1804         int                      rc = 0, i;
1805         struct lcfg_type_data   *ldata;
1806
1807         LASSERT(rec->lrh_type == OBD_CFG_REC);
1808         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1809         if (rc < 0)
1810                 return rc;
1811
1812         ldata = lcfg_cmd2data(lcfg->lcfg_command);
1813         if (ldata == NULL)
1814                 return -ENOTTY;
1815
1816         if (lcfg->lcfg_command == LCFG_MARKER)
1817                 return 0;
1818
1819         /* form YAML entity */
1820         ptr += snprintf(ptr, end - ptr, "- { event: %s", ldata->ltd_name);
1821
1822         if (lcfg->lcfg_flags)
1823                 ptr += snprintf(ptr, end - ptr, ", flags: %#08x",
1824                                 lcfg->lcfg_flags);
1825         if (lcfg->lcfg_num)
1826                 ptr += snprintf(ptr, end - ptr, ", num: %#08x",
1827                                 lcfg->lcfg_num);
1828         if (lcfg->lcfg_nid)
1829                 ptr += snprintf(ptr, end - ptr, ", nid: %s("LPX64")",
1830                                 libcfs_nid2str(lcfg->lcfg_nid),
1831                                 lcfg->lcfg_nid);
1832
1833         if (LUSTRE_CFG_BUFLEN(lcfg, 0) > 0)
1834                 ptr += snprintf(ptr, end - ptr, ", device: %s",
1835                                 lustre_cfg_string(lcfg, 0));
1836
1837         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1838                 if (LUSTRE_CFG_BUFLEN(lcfg, i) > 0)
1839                         ptr += snprintf(ptr, end - ptr, ", %s: %s",
1840                                         ldata->ltd_bufs[i - 1],
1841                                         lustre_cfg_string(lcfg, i));
1842         }
1843
1844         ptr += snprintf(ptr, end - ptr, " }\n");
1845         /* return consumed bytes */
1846         rc = ptr - buf;
1847         return rc;
1848 }
1849
1850 /**
1851  * parse config record and output dump in supplied buffer.
1852  * This is separated from class_config_dump_handler() to use
1853  * for ioctl needs as well
1854  */
1855 int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
1856 {
1857         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1858         char                    *ptr = buf;
1859         char                    *end = buf + size;
1860         int                      rc = 0;
1861
1862         ENTRY;
1863
1864         LASSERT(rec->lrh_type == OBD_CFG_REC);
1865         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1866         if (rc < 0)
1867                 RETURN(rc);
1868
1869         ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
1870         if (lcfg->lcfg_flags)
1871                 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1872                                 lcfg->lcfg_flags);
1873
1874         if (lcfg->lcfg_num)
1875                 ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
1876
1877         if (lcfg->lcfg_nid)
1878                 ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1879                                 libcfs_nid2str(lcfg->lcfg_nid),
1880                                 lcfg->lcfg_nid);
1881
1882         if (lcfg->lcfg_command == LCFG_MARKER) {
1883                 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1884
1885                 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1886                                 marker->cm_step, marker->cm_flags,
1887                                 marker->cm_tgtname, marker->cm_comment);
1888         } else {
1889                 int i;
1890
1891                 for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1892                         ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1893                                         lustre_cfg_string(lcfg, i));
1894                 }
1895         }
1896         ptr += snprintf(ptr, end - ptr, "\n");
1897         /* return consumed bytes */
1898         rc = ptr - buf;
1899         RETURN(rc);
1900 }
1901
1902 int class_config_dump_handler(const struct lu_env *env,
1903                               struct llog_handle *handle,
1904                               struct llog_rec_hdr *rec, void *data)
1905 {
1906         char    *outstr;
1907         int      rc = 0;
1908
1909         ENTRY;
1910
1911         OBD_ALLOC(outstr, 256);
1912         if (outstr == NULL)
1913                 RETURN(-ENOMEM);
1914
1915         if (rec->lrh_type == OBD_CFG_REC) {
1916                 class_config_parse_rec(rec, outstr, 256);
1917                 LCONSOLE(D_WARNING, "   %s", outstr);
1918         } else {
1919                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1920                 rc = -EINVAL;
1921         }
1922
1923         OBD_FREE(outstr, 256);
1924         RETURN(rc);
1925 }
1926
1927 int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1928                            char *name, struct config_llog_instance *cfg)
1929 {
1930         struct llog_handle      *llh;
1931         int                      rc;
1932
1933         ENTRY;
1934
1935         LCONSOLE_INFO("Dumping config log %s\n", name);
1936
1937         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1938         if (rc)
1939                 RETURN(rc);
1940
1941         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1942         if (rc)
1943                 GOTO(parse_out, rc);
1944
1945         rc = llog_process(env, llh, class_config_dump_handler, cfg, NULL);
1946 parse_out:
1947         llog_close(env, llh);
1948
1949         LCONSOLE_INFO("End config log %s\n", name);
1950         RETURN(rc);
1951 }
1952 EXPORT_SYMBOL(class_config_dump_llog);
1953
1954 /** Call class_cleanup and class_detach.
1955  * "Manual" only in the sense that we're faking lcfg commands.
1956  */
1957 int class_manual_cleanup(struct obd_device *obd)
1958 {
1959         char                    flags[3] = "";
1960         struct lustre_cfg      *lcfg;
1961         struct lustre_cfg_bufs  bufs;
1962         int                     rc;
1963         ENTRY;
1964
1965         if (!obd) {
1966                 CERROR("empty cleanup\n");
1967                 RETURN(-EALREADY);
1968         }
1969
1970         if (obd->obd_force)
1971                 strcat(flags, "F");
1972         if (obd->obd_fail)
1973                 strcat(flags, "A");
1974
1975         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1976                obd->obd_name, flags);
1977
1978         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1979         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1980         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1981         if (!lcfg)
1982                 RETURN(-ENOMEM);
1983
1984         rc = class_process_config(lcfg);
1985         if (rc) {
1986                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1987                 GOTO(out, rc);
1988         }
1989
1990         /* the lcfg is almost the same for both ops */
1991         lcfg->lcfg_command = LCFG_DETACH;
1992         rc = class_process_config(lcfg);
1993         if (rc)
1994                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1995 out:
1996         lustre_cfg_free(lcfg);
1997         RETURN(rc);
1998 }
1999 EXPORT_SYMBOL(class_manual_cleanup);
2000
2001 /*
2002  * uuid<->export lustre hash operations
2003  */
2004
2005 static unsigned
2006 uuid_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2007 {
2008         return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
2009                                   sizeof(((struct obd_uuid *)key)->uuid), mask);
2010 }
2011
2012 static void *
2013 uuid_key(cfs_hlist_node_t *hnode)
2014 {
2015         struct obd_export *exp;
2016
2017         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2018
2019         return &exp->exp_client_uuid;
2020 }
2021
2022 /*
2023  * NOTE: It is impossible to find an export that is in failed
2024  *       state with this function
2025  */
2026 static int
2027 uuid_keycmp(const void *key, cfs_hlist_node_t *hnode)
2028 {
2029         struct obd_export *exp;
2030
2031         LASSERT(key);
2032         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2033
2034         return obd_uuid_equals(key, &exp->exp_client_uuid) &&
2035                !exp->exp_failed;
2036 }
2037
2038 static void *
2039 uuid_export_object(cfs_hlist_node_t *hnode)
2040 {
2041         return cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2042 }
2043
2044 static void
2045 uuid_export_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2046 {
2047         struct obd_export *exp;
2048
2049         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2050         class_export_get(exp);
2051 }
2052
2053 static void
2054 uuid_export_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2055 {
2056         struct obd_export *exp;
2057
2058         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2059         class_export_put(exp);
2060 }
2061
2062 static cfs_hash_ops_t uuid_hash_ops = {
2063         .hs_hash        = uuid_hash,
2064         .hs_key         = uuid_key,
2065         .hs_keycmp      = uuid_keycmp,
2066         .hs_object      = uuid_export_object,
2067         .hs_get         = uuid_export_get,
2068         .hs_put_locked  = uuid_export_put_locked,
2069 };
2070
2071
2072 /*
2073  * nid<->export hash operations
2074  */
2075
2076 static unsigned
2077 nid_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2078 {
2079         return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
2080 }
2081
2082 static void *
2083 nid_key(cfs_hlist_node_t *hnode)
2084 {
2085         struct obd_export *exp;
2086
2087         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2088
2089         RETURN(&exp->exp_connection->c_peer.nid);
2090 }
2091
2092 /*
2093  * NOTE: It is impossible to find an export that is in failed
2094  *       state with this function
2095  */
2096 static int
2097 nid_kepcmp(const void *key, cfs_hlist_node_t *hnode)
2098 {
2099         struct obd_export *exp;
2100
2101         LASSERT(key);
2102         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2103
2104         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
2105                !exp->exp_failed);
2106 }
2107
2108 static void *
2109 nid_export_object(cfs_hlist_node_t *hnode)
2110 {
2111         return cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2112 }
2113
2114 static void
2115 nid_export_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2116 {
2117         struct obd_export *exp;
2118
2119         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2120         class_export_get(exp);
2121 }
2122
2123 static void
2124 nid_export_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2125 {
2126         struct obd_export *exp;
2127
2128         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2129         class_export_put(exp);
2130 }
2131
2132 static cfs_hash_ops_t nid_hash_ops = {
2133         .hs_hash        = nid_hash,
2134         .hs_key         = nid_key,
2135         .hs_keycmp      = nid_kepcmp,
2136         .hs_object      = nid_export_object,
2137         .hs_get         = nid_export_get,
2138         .hs_put_locked  = nid_export_put_locked,
2139 };
2140
2141
2142 /*
2143  * nid<->nidstats hash operations
2144  */
2145
2146 static void *
2147 nidstats_key(cfs_hlist_node_t *hnode)
2148 {
2149         struct nid_stat *ns;
2150
2151         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
2152
2153         return &ns->nid;
2154 }
2155
2156 static int
2157 nidstats_keycmp(const void *key, cfs_hlist_node_t *hnode)
2158 {
2159         return *(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key;
2160 }
2161
2162 static void *
2163 nidstats_object(cfs_hlist_node_t *hnode)
2164 {
2165         return cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
2166 }
2167
2168 static void
2169 nidstats_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2170 {
2171         struct nid_stat *ns;
2172
2173         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
2174         nidstat_getref(ns);
2175 }
2176
2177 static void
2178 nidstats_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2179 {
2180         struct nid_stat *ns;
2181
2182         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
2183         nidstat_putref(ns);
2184 }
2185
2186 static cfs_hash_ops_t nid_stat_hash_ops = {
2187         .hs_hash        = nid_hash,
2188         .hs_key         = nidstats_key,
2189         .hs_keycmp      = nidstats_keycmp,
2190         .hs_object      = nidstats_object,
2191         .hs_get         = nidstats_get,
2192         .hs_put_locked  = nidstats_put_locked,
2193 };