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, 2014, 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 #include <obd_class.h>
  43 #include <linux/string.h>
  44 #include <lustre_disk.h>
  45 #include <lustre_ioctl.h>
  46 #include <lustre_log.h>
  47 #include <lprocfs_status.h>
  48 #include <lustre_param.h>
  49
  50 #include "llog_internal.h"
  51
  52 static struct cfs_hash_ops uuid_hash_ops;
  53 static struct cfs_hash_ops nid_hash_ops;
  54 static struct cfs_hash_ops nid_stat_hash_ops;
  55 static struct cfs_hash_ops gen_hash_ops;
  56
  57 /*********** string parsing utils *********/
  58
  59 /* returns 0 if we find this key in the buffer, else 1 */
  60 int class_find_param(char *buf, char *key, char **valp)
  61 {
  62         char *ptr;
  63
  64         if (!buf)
  65                 return 1;
  66
  67         if ((ptr = strstr(buf, key)) == NULL)
  68                 return 1;
  69
  70         if (valp)
  71                 *valp = ptr + strlen(key);
  72
  73         return 0;
  74 }
  75 EXPORT_SYMBOL(class_find_param);
  76
  77 /**
  78  * Check whether the proc parameter \a param is an old parameter or not from
  79  * the array \a ptr which contains the mapping from old parameters to new ones.
  80  * If it's an old one, then return the pointer to the cfg_interop_param struc-
  81  * ture which contains both the old and new parameters.
  82  *
  83  * \param param                 proc parameter
  84  * \param ptr                   an array which contains the mapping from
  85  *                              old parameters to new ones
  86  *
  87  * \retval valid-pointer        pointer to the cfg_interop_param structure
  88  *                              which contains the old and new parameters
  89  * \retval NULL                 \a param or \a ptr is NULL,
  90  *                              or \a param is not an old parameter
  91  */
  92 struct cfg_interop_param *class_find_old_param(const char *param,
  93                                                struct cfg_interop_param *ptr)
  94 {
  95         char *value = NULL;
  96         int   name_len = 0;
  97
  98         if (param == NULL || ptr == NULL)
  99                 RETURN(NULL);
 100
 101         value = strchr(param, '=');
 102         if (value == NULL)
 103                 name_len = strlen(param);
 104         else
 105                 name_len = value - param;
 106
 107         while (ptr->old_param != NULL) {
 108                 if (strncmp(param, ptr->old_param, name_len) == 0 &&
 109                     name_len == strlen(ptr->old_param))
 110                         RETURN(ptr);
 111                 ptr++;
 112         }
 113
 114         RETURN(NULL);
 115 }
 116 EXPORT_SYMBOL(class_find_old_param);
 117
 118 /**
 119  * Finds a parameter in \a params and copies it to \a copy.
 120  *
 121  * Leading spaces are skipped. Next space or end of string is the
 122  * parameter terminator with the exception that spaces inside single or double
 123  * quotes get included into a parameter. The parameter is copied into \a copy
 124  * which has to be allocated big enough by a caller, quotes are stripped in
 125  * the copy and the copy is terminated by 0.
 126  *
 127  * On return \a params is set to next parameter or to NULL if last
 128  * parameter is returned.
 129  *
 130  * \retval 0 if parameter is returned in \a copy
 131  * \retval 1 otherwise
 132  * \retval -EINVAL if unbalanced quota is found
 133  */
 134 int class_get_next_param(char **params, char *copy)
 135 {
 136         char *q1, *q2, *str;
 137         int len;
 138
 139         str = *params;
 140         while (*str == ' ')
 141                 str++;
 142
 143         if (*str == '\0') {
 144                 *params = NULL;
 145                 return 1;
 146         }
 147
 148         while (1) {
 149                 q1 = strpbrk(str, " '\"");
 150                 if (q1 == NULL) {
 151                         len = strlen(str);
 152                         memcpy(copy, str, len);
 153                         copy[len] = '\0';
 154                         *params = NULL;
 155                         return 0;
 156                 }
 157                 len = q1 - str;
 158                 if (*q1 == ' ') {
 159                         memcpy(copy, str, len);
 160                         copy[len] = '\0';
 161                         *params = str + len;
 162                         return 0;
 163                 }
 164
 165                 memcpy(copy, str, len);
 166                 copy += len;
 167
 168                 /* search for the matching closing quote */
 169                 str = q1 + 1;
 170                 q2 = strchr(str, *q1);
 171                 if (q2 == NULL) {
 172                         CERROR("Unbalanced quota in parameters: \"%s\"\n",
 173                                *params);
 174                         return -EINVAL;
 175                 }
 176                 len = q2 - str;
 177                 memcpy(copy, str, len);
 178                 copy += len;
 179                 str = q2 + 1;
 180         }
 181         return 1;
 182 }
 183 EXPORT_SYMBOL(class_get_next_param);
 184
 185 /* returns 0 if this is the first key in the buffer, else 1.
 186    valp points to first char after key. */
 187 int class_match_param(char *buf, const char *key, char **valp)
 188 {
 189         if (!buf)
 190                 return 1;
 191
 192         if (memcmp(buf, key, strlen(key)) != 0)
 193                 return 1;
 194
 195         if (valp)
 196                 *valp = buf + strlen(key);
 197
 198         return 0;
 199 }
 200 EXPORT_SYMBOL(class_match_param);
 201
 202 static int parse_nid(char *buf, void *value, int quiet)
 203 {
 204         lnet_nid_t *nid = (lnet_nid_t *)value;
 205
 206         *nid = libcfs_str2nid(buf);
 207         if (*nid != LNET_NID_ANY)
 208                 return 0;
 209
 210         if (!quiet)
 211                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
 212         return -EINVAL;
 213 }
 214
 215 static int parse_net(char *buf, void *value)
 216 {
 217         __u32 *net = (__u32 *)value;
 218
 219         *net = libcfs_str2net(buf);
 220         CDEBUG(D_INFO, "Net %s\n", libcfs_net2str(*net));
 221         return 0;
 222 }
 223
 224 enum {
 225         CLASS_PARSE_NID = 1,
 226         CLASS_PARSE_NET,
 227 };
 228
 229 /* 0 is good nid,
 230    1 not found
 231    < 0 error
 232    endh is set to next separator */
 233 static int class_parse_value(char *buf, int opc, void *value, char **endh,
 234                              int quiet)
 235 {
 236         char *endp;
 237         char  tmp;
 238         int   rc = 0;
 239
 240         if (!buf)
 241                 return 1;
 242         while (*buf == ',' || *buf == ':')
 243                 buf++;
 244         if (*buf == ' ' || *buf == '/' || *buf == '\0')
 245                 return 1;
 246
 247         /* nid separators or end of nids */
 248         endp = strpbrk(buf, ",: /");
 249         if (endp == NULL)
 250                 endp = buf + strlen(buf);
 251
 252         tmp = *endp;
 253         *endp = '\0';
 254         switch (opc) {
 255         default:
 256                 LBUG();
 257         case CLASS_PARSE_NID:
 258                 rc = parse_nid(buf, value, quiet);
 259                 break;
 260         case CLASS_PARSE_NET:
 261                 rc = parse_net(buf, value);
 262                 break;
 263         }
 264         *endp = tmp;
 265         if (rc != 0)
 266                 return rc;
 267         if (endh)
 268                 *endh = endp;
 269         return 0;
 270 }
 271
 272 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
 273 {
 274         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 0);
 275 }
 276 EXPORT_SYMBOL(class_parse_nid);
 277
 278 int class_parse_nid_quiet(char *buf, lnet_nid_t *nid, char **endh)
 279 {
 280         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 1);
 281 }
 282 EXPORT_SYMBOL(class_parse_nid_quiet);
 283
 284 int class_parse_net(char *buf, __u32 *net, char **endh)
 285 {
 286         return class_parse_value(buf, CLASS_PARSE_NET, (void *)net, endh, 0);
 287 }
 288
 289 /* 1 param contains key and match
 290  * 0 param contains key and not match
 291  * -1 param does not contain key
 292  */
 293 int class_match_nid(char *buf, char *key, lnet_nid_t nid)
 294 {
 295         lnet_nid_t tmp;
 296         int   rc = -1;
 297
 298         while (class_find_param(buf, key, &buf) == 0) {
 299                 /* please restrict to the nids pertaining to
 300                  * the specified nids */
 301                 while (class_parse_nid(buf, &tmp, &buf) == 0) {
 302                         if (tmp == nid)
 303                                 return 1;
 304                 }
 305                 rc = 0;
 306         }
 307         return rc;
 308 }
 309
 310 int class_match_net(char *buf, char *key, __u32 net)
 311 {
 312         __u32 tmp;
 313         int   rc = -1;
 314
 315         while (class_find_param(buf, key, &buf) == 0) {
 316                 /* please restrict to the nids pertaining to
 317                  * the specified networks */
 318                 while (class_parse_net(buf, &tmp, &buf) == 0) {
 319                         if (tmp == net)
 320                                 return 1;
 321                 }
 322                 rc = 0;
 323         }
 324         return rc;
 325 }
 326
 327 /********************** class fns **********************/
 328
 329 /**
 330  * Create a new obd device and set the type, name and uuid.  If successful,
 331  * the new device can be accessed by either name or uuid.
 332  */
 333 int class_attach(struct lustre_cfg *lcfg)
 334 {
 335         struct obd_device *obd = NULL;
 336         char *typename, *name, *uuid;
 337         int rc, len;
 338         ENTRY;
 339
 340         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 341                 CERROR("No type passed!\n");
 342                 RETURN(-EINVAL);
 343         }
 344         typename = lustre_cfg_string(lcfg, 1);
 345
 346         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
 347                 CERROR("No name passed!\n");
 348                 RETURN(-EINVAL);
 349         }
 350         name = lustre_cfg_string(lcfg, 0);
 351
 352         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
 353                 CERROR("No UUID passed!\n");
 354                 RETURN(-EINVAL);
 355         }
 356         uuid = lustre_cfg_string(lcfg, 2);
 357
 358         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 359                MKSTR(typename), MKSTR(name), MKSTR(uuid));
 360
 361         obd = class_newdev(typename, name);
 362         if (IS_ERR(obd)) {
 363                 /* Already exists or out of obds */
 364                 rc = PTR_ERR(obd);
 365                 obd = NULL;
 366                 CERROR("Cannot create device %s of type %s : %d\n",
 367                        name, typename, rc);
 368                 GOTO(out, rc);
 369         }
 370         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
 371                  name, typename);
 372         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 373                  "obd %p obd_magic %08X != %08X\n",
 374                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 375         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
 376                  "%p obd_name %s != %s\n", obd, obd->obd_name, name);
 377
 378         rwlock_init(&obd->obd_pool_lock);
 379         obd->obd_pool_limit = 0;
 380         obd->obd_pool_slv = 0;
 381
 382         INIT_LIST_HEAD(&obd->obd_exports);
 383         INIT_LIST_HEAD(&obd->obd_unlinked_exports);
 384         INIT_LIST_HEAD(&obd->obd_delayed_exports);
 385         INIT_LIST_HEAD(&obd->obd_exports_timed);
 386         INIT_LIST_HEAD(&obd->obd_nid_stats);
 387         spin_lock_init(&obd->obd_nid_lock);
 388         spin_lock_init(&obd->obd_dev_lock);
 389         mutex_init(&obd->obd_dev_mutex);
 390         spin_lock_init(&obd->obd_osfs_lock);
 391         /* obd->obd_osfs_age must be set to a value in the distant
 392          * past to guarantee a fresh statfs is fetched on mount. */
 393         obd->obd_osfs_age = cfs_time_shift_64(-1000);
 394
 395         /* XXX belongs in setup not attach  */
 396         init_rwsem(&obd->obd_observer_link_sem);
 397         /* recovery data */
 398         cfs_init_timer(&obd->obd_recovery_timer);
 399         spin_lock_init(&obd->obd_recovery_task_lock);
 400         init_waitqueue_head(&obd->obd_next_transno_waitq);
 401         init_waitqueue_head(&obd->obd_evict_inprogress_waitq);
 402         INIT_LIST_HEAD(&obd->obd_req_replay_queue);
 403         INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
 404         INIT_LIST_HEAD(&obd->obd_final_req_queue);
 405         INIT_LIST_HEAD(&obd->obd_evict_list);
 406         INIT_LIST_HEAD(&obd->obd_lwp_list);
 407
 408         llog_group_init(&obd->obd_olg);
 409
 410         obd->obd_conn_inprogress = 0;
 411
 412         len = strlen(uuid);
 413         if (len >= sizeof(obd->obd_uuid)) {
 414                 CERROR("uuid must be < %d bytes long\n",
 415                        (int)sizeof(obd->obd_uuid));
 416                 GOTO(out, rc = -EINVAL);
 417         }
 418         memcpy(obd->obd_uuid.uuid, uuid, len);
 419
 420         /* Detach drops this */
 421         spin_lock(&obd->obd_dev_lock);
 422         atomic_set(&obd->obd_refcount, 1);
 423         spin_unlock(&obd->obd_dev_lock);
 424         lu_ref_init(&obd->obd_reference);
 425         lu_ref_add(&obd->obd_reference, "attach", obd);
 426
 427         obd->obd_attached = 1;
 428         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 429                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 430         RETURN(0);
 431  out:
 432         if (obd != NULL) {
 433                 class_release_dev(obd);
 434         }
 435         return rc;
 436 }
 437 EXPORT_SYMBOL(class_attach);
 438
 439 /** Create hashes, self-export, and call type-specific setup.
 440  * Setup is effectively the "start this obd" call.
 441  */
 442 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 443 {
 444         int err = 0;
 445         struct obd_export *exp;
 446         ENTRY;
 447
 448         LASSERT(obd != NULL);
 449         LASSERTF(obd == class_num2obd(obd->obd_minor),
 450                  "obd %p != obd_devs[%d] %p\n",
 451                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 452         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 453                  "obd %p obd_magic %08x != %08x\n",
 454                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 455
 456         /* have we attached a type to this device? */
 457         if (!obd->obd_attached) {
 458                 CERROR("Device %d not attached\n", obd->obd_minor);
 459                 RETURN(-ENODEV);
 460         }
 461
 462         if (obd->obd_set_up) {
 463                 CERROR("Device %d already setup (type %s)\n",
 464                        obd->obd_minor, obd->obd_type->typ_name);
 465                 RETURN(-EEXIST);
 466         }
 467
 468         /* is someone else setting us up right now? (attach inits spinlock) */
 469         spin_lock(&obd->obd_dev_lock);
 470         if (obd->obd_starting) {
 471                 spin_unlock(&obd->obd_dev_lock);
 472                 CERROR("Device %d setup in progress (type %s)\n",
 473                        obd->obd_minor, obd->obd_type->typ_name);
 474                 RETURN(-EEXIST);
 475         }
 476         /* just leave this on forever.  I can't use obd_set_up here because
 477            other fns check that status, and we're not actually set up yet. */
 478         obd->obd_starting = 1;
 479         obd->obd_uuid_hash = NULL;
 480         obd->obd_nid_hash = NULL;
 481         obd->obd_nid_stats_hash = NULL;
 482         obd->obd_gen_hash = NULL;
 483         spin_unlock(&obd->obd_dev_lock);
 484
 485         /* create an uuid-export lustre hash */
 486         obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
 487                                              HASH_UUID_CUR_BITS,
 488                                              HASH_UUID_MAX_BITS,
 489                                              HASH_UUID_BKT_BITS, 0,
 490                                              CFS_HASH_MIN_THETA,
 491                                              CFS_HASH_MAX_THETA,
 492                                              &uuid_hash_ops, CFS_HASH_DEFAULT);
 493         if (!obd->obd_uuid_hash)
 494                 GOTO(err_hash, err = -ENOMEM);
 495
 496         /* create a nid-export lustre hash */
 497         obd->obd_nid_hash = cfs_hash_create("NID_HASH",
 498                                             HASH_NID_CUR_BITS,
 499                                             HASH_NID_MAX_BITS,
 500                                             HASH_NID_BKT_BITS, 0,
 501                                             CFS_HASH_MIN_THETA,
 502                                             CFS_HASH_MAX_THETA,
 503                                             &nid_hash_ops, CFS_HASH_DEFAULT);
 504         if (!obd->obd_nid_hash)
 505                 GOTO(err_hash, err = -ENOMEM);
 506
 507         /* create a nid-stats lustre hash */
 508         obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
 509                                                   HASH_NID_STATS_CUR_BITS,
 510                                                   HASH_NID_STATS_MAX_BITS,
 511                                                   HASH_NID_STATS_BKT_BITS, 0,
 512                                                   CFS_HASH_MIN_THETA,
 513                                                   CFS_HASH_MAX_THETA,
 514                                                   &nid_stat_hash_ops, CFS_HASH_DEFAULT);
 515         if (!obd->obd_nid_stats_hash)
 516                 GOTO(err_hash, err = -ENOMEM);
 517
 518         /* create a client_generation-export lustre hash */
 519         obd->obd_gen_hash = cfs_hash_create("UUID_HASH",
 520                                             HASH_GEN_CUR_BITS,
 521                                             HASH_GEN_MAX_BITS,
 522                                             HASH_GEN_BKT_BITS, 0,
 523                                             CFS_HASH_MIN_THETA,
 524                                             CFS_HASH_MAX_THETA,
 525                                             &gen_hash_ops, CFS_HASH_DEFAULT);
 526         if (!obd->obd_gen_hash)
 527                 GOTO(err_hash, err = -ENOMEM);
 528
 529         exp = class_new_export(obd, &obd->obd_uuid);
 530         if (IS_ERR(exp))
 531                 GOTO(err_hash, err = PTR_ERR(exp));
 532
 533         obd->obd_self_export = exp;
 534         list_del_init(&exp->exp_obd_chain_timed);
 535         class_export_put(exp);
 536
 537         err = obd_setup(obd, lcfg);
 538         if (err)
 539                 GOTO(err_exp, err);
 540
 541         obd->obd_set_up = 1;
 542
 543         spin_lock(&obd->obd_dev_lock);
 544         /* cleanup drops this */
 545         class_incref(obd, "setup", obd);
 546         spin_unlock(&obd->obd_dev_lock);
 547
 548         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 549                obd->obd_name, obd->obd_uuid.uuid);
 550
 551         RETURN(0);
 552 err_exp:
 553         if (obd->obd_self_export) {
 554                 class_unlink_export(obd->obd_self_export);
 555                 obd->obd_self_export = NULL;
 556         }
 557 err_hash:
 558         if (obd->obd_uuid_hash) {
 559                 cfs_hash_putref(obd->obd_uuid_hash);
 560                 obd->obd_uuid_hash = NULL;
 561         }
 562         if (obd->obd_nid_hash) {
 563                 cfs_hash_putref(obd->obd_nid_hash);
 564                 obd->obd_nid_hash = NULL;
 565         }
 566         if (obd->obd_nid_stats_hash) {
 567                 cfs_hash_putref(obd->obd_nid_stats_hash);
 568                 obd->obd_nid_stats_hash = NULL;
 569         }
 570         if (obd->obd_gen_hash) {
 571                 cfs_hash_putref(obd->obd_gen_hash);
 572                 obd->obd_gen_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         spin_unlock(&obd->obd_dev_lock);
 635
 636         /* wait for already-arrived-connections to finish. */
 637         while (obd->obd_conn_inprogress > 0)
 638                 yield();
 639         smp_rmb();
 640
 641         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 642                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 643                         switch (*flag) {
 644                         case 'F':
 645                                 obd->obd_force = 1;
 646                                 break;
 647                         case 'A':
 648                                 LCONSOLE_WARN("Failing over %s\n",
 649                                               obd->obd_name);
 650                                 obd->obd_fail = 1;
 651                                 obd->obd_no_transno = 1;
 652                                 obd->obd_no_recov = 1;
 653                                 if (OBP(obd, iocontrol)) {
 654                                         obd_iocontrol(OBD_IOC_SYNC,
 655                                                       obd->obd_self_export,
 656                                                       0, NULL, NULL);
 657                                 }
 658                                 break;
 659                         default:
 660                                 CERROR("Unrecognised flag '%c'\n", *flag);
 661                         }
 662         }
 663
 664         LASSERT(obd->obd_self_export);
 665
 666         /* The three references that should be remaining are the
 667          * obd_self_export and the attach and setup references. */
 668         if (atomic_read(&obd->obd_refcount) > 3) {
 669                 /* refcounf - 3 might be the number of real exports
 670                    (excluding self export). But class_incref is called
 671                    by other things as well, so don't count on it. */
 672                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 673                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 674                 dump_exports(obd, 0);
 675                 class_disconnect_exports(obd);
 676         }
 677
 678         /* Precleanup, we must make sure all exports get destroyed. */
 679         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 680         if (err)
 681                 CERROR("Precleanup %s returned %d\n",
 682                        obd->obd_name, err);
 683
 684         /* destroy an uuid-export hash body */
 685         if (obd->obd_uuid_hash) {
 686                 cfs_hash_putref(obd->obd_uuid_hash);
 687                 obd->obd_uuid_hash = NULL;
 688         }
 689
 690         /* destroy a nid-export hash body */
 691         if (obd->obd_nid_hash) {
 692                 cfs_hash_putref(obd->obd_nid_hash);
 693                 obd->obd_nid_hash = NULL;
 694         }
 695
 696         /* destroy a nid-stats hash body */
 697         if (obd->obd_nid_stats_hash) {
 698                 cfs_hash_putref(obd->obd_nid_stats_hash);
 699                 obd->obd_nid_stats_hash = NULL;
 700         }
 701
 702         /* destroy a client_generation-export hash body */
 703         if (obd->obd_gen_hash) {
 704                 cfs_hash_putref(obd->obd_gen_hash);
 705                 obd->obd_gen_hash = NULL;
 706         }
 707
 708         class_decref(obd, "setup", obd);
 709         obd->obd_set_up = 0;
 710
 711         RETURN(0);
 712 }
 713
 714 struct obd_device *class_incref(struct obd_device *obd,
 715                                 const char *scope, const void *source)
 716 {
 717         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 718         atomic_inc(&obd->obd_refcount);
 719         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 720                atomic_read(&obd->obd_refcount));
 721
 722         return obd;
 723 }
 724 EXPORT_SYMBOL(class_incref);
 725
 726 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 727 {
 728         int err;
 729         int refs;
 730
 731         spin_lock(&obd->obd_dev_lock);
 732         atomic_dec(&obd->obd_refcount);
 733         refs = atomic_read(&obd->obd_refcount);
 734         spin_unlock(&obd->obd_dev_lock);
 735         lu_ref_del(&obd->obd_reference, scope, source);
 736
 737         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 738
 739         if ((refs == 1) && obd->obd_stopping) {
 740                 /* All exports have been destroyed; there should
 741                    be no more in-progress ops by this point.*/
 742
 743                 spin_lock(&obd->obd_self_export->exp_lock);
 744                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
 745                 spin_unlock(&obd->obd_self_export->exp_lock);
 746
 747                 /* note that we'll recurse into class_decref again */
 748                 class_unlink_export(obd->obd_self_export);
 749                 return;
 750         }
 751
 752         if (refs == 0) {
 753                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 754                        obd->obd_name, obd->obd_uuid.uuid);
 755                 LASSERT(!obd->obd_attached);
 756                 if (obd->obd_stopping) {
 757                         /* If we're not stopping, we were never set up */
 758                         err = obd_cleanup(obd);
 759                         if (err)
 760                                 CERROR("Cleanup %s returned %d\n",
 761                                        obd->obd_name, err);
 762                 }
 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
 805 /** Remove a failover nid location.
 806  */
 807 static int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 808 {
 809         struct obd_import *imp;
 810         struct obd_uuid uuid;
 811         int rc;
 812         ENTRY;
 813
 814         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 815             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 816                 CERROR("invalid conn_uuid\n");
 817                 RETURN(-EINVAL);
 818         }
 819         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 820             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 821                 CERROR("can't del connection on non-client dev\n");
 822                 RETURN(-EINVAL);
 823         }
 824
 825         imp = obd->u.cli.cl_import;
 826         if (!imp) {
 827                 CERROR("try to del conn on immature client dev\n");
 828                 RETURN(-EINVAL);
 829         }
 830
 831         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 832         rc = obd_del_conn(imp, &uuid);
 833
 834         RETURN(rc);
 835 }
 836
 837 static struct list_head lustre_profile_list =
 838         LIST_HEAD_INIT(lustre_profile_list);
 839
 840 struct lustre_profile *class_get_profile(const char * prof)
 841 {
 842         struct lustre_profile *lprof;
 843
 844         ENTRY;
 845         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 static 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         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         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                 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         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 933                 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         OBD_FREE(new_param, new_len);
1038         OBD_FREE_PTR(bufs);
1039         if (new_cfg == NULL)
1040                 RETURN(ERR_PTR(-ENOMEM));
1041
1042         new_cfg->lcfg_num = cfg->lcfg_num;
1043         new_cfg->lcfg_flags = cfg->lcfg_flags;
1044         new_cfg->lcfg_nid = cfg->lcfg_nid;
1045         new_cfg->lcfg_nal = cfg->lcfg_nal;
1046
1047         RETURN(new_cfg);
1048 }
1049 EXPORT_SYMBOL(lustre_cfg_rename);
1050
1051 static int process_param2_config(struct lustre_cfg *lcfg)
1052 {
1053         char *param = lustre_cfg_string(lcfg, 1);
1054         char *upcall = lustre_cfg_string(lcfg, 2);
1055         char *argv[] = {
1056                 [0] = "/usr/sbin/lctl",
1057                 [1] = "set_param",
1058                 [2] = param,
1059                 [3] = NULL
1060         };
1061         struct timeval  start;
1062         struct timeval  end;
1063         int             rc;
1064         ENTRY;
1065
1066         /* Add upcall processing here. Now only lctl is supported */
1067         if (strcmp(upcall, LCTL_UPCALL) != 0) {
1068                 CERROR("Unsupported upcall %s\n", upcall);
1069                 RETURN(-EINVAL);
1070         }
1071
1072         do_gettimeofday(&start);
1073         rc = call_usermodehelper(argv[0], argv, NULL, UMH_WAIT_PROC);
1074         do_gettimeofday(&end);
1075
1076         if (rc < 0) {
1077                 CERROR("lctl: error invoking upcall %s %s %s: rc = %d; "
1078                        "time %ldus\n", argv[0], argv[1], argv[2], rc,
1079                        cfs_timeval_sub(&end, &start, NULL));
1080         } else {
1081                 CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
1082                        argv[0], argv[1], argv[2],
1083                        cfs_timeval_sub(&end, &start, NULL));
1084                        rc = 0;
1085         }
1086
1087         RETURN(rc);
1088 }
1089
1090 void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
1091 {
1092         quota_process_config = qpc;
1093 }
1094 EXPORT_SYMBOL(lustre_register_quota_process_config);
1095
1096 /** Process configuration commands given in lustre_cfg form.
1097  * These may come from direct calls (e.g. class_manual_cleanup)
1098  * or processing the config llog, or ioctl from lctl.
1099  */
1100 int class_process_config(struct lustre_cfg *lcfg)
1101 {
1102         struct obd_device *obd;
1103         int err;
1104
1105         LASSERT(lcfg && !IS_ERR(lcfg));
1106         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
1107
1108         /* Commands that don't need a device */
1109         switch(lcfg->lcfg_command) {
1110         case LCFG_ATTACH: {
1111                 err = class_attach(lcfg);
1112                 GOTO(out, err);
1113         }
1114         case LCFG_ADD_UUID: {
1115                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
1116                        " (%s)\n", lustre_cfg_string(lcfg, 1),
1117                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
1118
1119                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
1120                 GOTO(out, err);
1121         }
1122         case LCFG_DEL_UUID: {
1123                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
1124                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
1125                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
1126
1127                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
1128                 GOTO(out, err);
1129         }
1130         case LCFG_MOUNTOPT: {
1131                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
1132                        lustre_cfg_string(lcfg, 1),
1133                        lustre_cfg_string(lcfg, 2),
1134                        lustre_cfg_string(lcfg, 3));
1135                 /* set these mount options somewhere, so ll_fill_super
1136                  * can find them. */
1137                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
1138                                         lustre_cfg_string(lcfg, 1),
1139                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
1140                                         lustre_cfg_string(lcfg, 2),
1141                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
1142                                         lustre_cfg_string(lcfg, 3));
1143                 GOTO(out, err);
1144         }
1145         case LCFG_DEL_MOUNTOPT: {
1146                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
1147                        lustre_cfg_string(lcfg, 1));
1148                 class_del_profile(lustre_cfg_string(lcfg, 1));
1149                 GOTO(out, err = 0);
1150         }
1151         case LCFG_SET_TIMEOUT: {
1152                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
1153                        obd_timeout, lcfg->lcfg_num);
1154                 obd_timeout = max(lcfg->lcfg_num, 1U);
1155                 obd_timeout_set = 1;
1156                 GOTO(out, err = 0);
1157         }
1158         case LCFG_SET_LDLM_TIMEOUT: {
1159                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
1160                        ldlm_timeout, lcfg->lcfg_num);
1161                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
1162                 if (ldlm_timeout >= obd_timeout)
1163                         ldlm_timeout = max(obd_timeout / 3, 1U);
1164                 ldlm_timeout_set = 1;
1165                 GOTO(out, err = 0);
1166         }
1167         case LCFG_SET_UPCALL: {
1168                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
1169                 /* COMPAT_146 Don't fail on old configs */
1170                 GOTO(out, err = 0);
1171         }
1172         case LCFG_MARKER: {
1173                 struct cfg_marker *marker;
1174                 marker = lustre_cfg_buf(lcfg, 1);
1175                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
1176                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
1177                 GOTO(out, err = 0);
1178         }
1179         case LCFG_PARAM: {
1180                 char *tmp;
1181                 /* llite has no obd */
1182                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
1183                                        PARAM_LLITE, NULL) == 0) &&
1184                     client_process_config) {
1185                         err = (*client_process_config)(lcfg);
1186                         GOTO(out, err);
1187                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1188                                               PARAM_SYS, &tmp) == 0)) {
1189                         /* Global param settings */
1190                         err = class_set_global(tmp, lcfg->lcfg_num, lcfg);
1191                         /*
1192                          * Client or server should not fail to mount if
1193                          * it hits an unknown configuration parameter.
1194                          */
1195                         if (err != 0)
1196                                 CWARN("Ignoring unknown param %s\n", tmp);
1197
1198                         GOTO(out, err = 0);
1199                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1200                                               PARAM_QUOTA, &tmp) == 0) &&
1201                            quota_process_config) {
1202                         err = (*quota_process_config)(lcfg);
1203                         GOTO(out, err);
1204                 }
1205
1206                 break;
1207         }
1208         case LCFG_SET_PARAM: {
1209                 err = process_param2_config(lcfg);
1210                 GOTO(out, err = 0);
1211         }
1212         }
1213         /* Commands that require a device */
1214         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1215         if (obd == NULL) {
1216                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
1217                         CERROR("this lcfg command requires a device name\n");
1218                 else
1219                         CERROR("no device for: %s\n",
1220                                lustre_cfg_string(lcfg, 0));
1221
1222                 GOTO(out, err = -EINVAL);
1223         }
1224
1225         switch(lcfg->lcfg_command) {
1226         case LCFG_SETUP: {
1227                 err = class_setup(obd, lcfg);
1228                 GOTO(out, err);
1229         }
1230         case LCFG_DETACH: {
1231                 err = class_detach(obd, lcfg);
1232                 GOTO(out, err = 0);
1233         }
1234         case LCFG_CLEANUP: {
1235                 err = class_cleanup(obd, lcfg);
1236                 GOTO(out, err = 0);
1237         }
1238         case LCFG_ADD_CONN: {
1239                 err = class_add_conn(obd, lcfg);
1240                 GOTO(out, err = 0);
1241         }
1242         case LCFG_DEL_CONN: {
1243                 err = class_del_conn(obd, lcfg);
1244                 GOTO(out, err = 0);
1245         }
1246         case LCFG_POOL_NEW: {
1247                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
1248                 GOTO(out, err = 0);
1249         }
1250         case LCFG_POOL_ADD: {
1251                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1252                                    lustre_cfg_string(lcfg, 3));
1253                 GOTO(out, err = 0);
1254         }
1255         case LCFG_POOL_REM: {
1256                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1257                                    lustre_cfg_string(lcfg, 3));
1258                 GOTO(out, err = 0);
1259         }
1260         case LCFG_POOL_DEL: {
1261                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
1262                 GOTO(out, err = 0);
1263         }
1264         default: {
1265                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
1266                 GOTO(out, err);
1267
1268         }
1269         }
1270 out:
1271         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
1272                 CWARN("Ignoring error %d on optional command %#x\n", err,
1273                       lcfg->lcfg_command);
1274                 err = 0;
1275         }
1276         return err;
1277 }
1278 EXPORT_SYMBOL(class_process_config);
1279
1280 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
1281                              struct lustre_cfg *lcfg, void *data)
1282 {
1283         struct lprocfs_vars *var;
1284         struct file fakefile;
1285         struct seq_file fake_seqfile;
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         /* fake a seq file so that var->fops->write can work... */
1299         fakefile.private_data = &fake_seqfile;
1300         fake_seqfile.private = data;
1301         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1302            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1303            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1304         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1305                 key = lustre_cfg_buf(lcfg, i);
1306                 /* Strip off prefix */
1307                 if (class_match_param(key, prefix, &key))
1308                         /* If the prefix doesn't match, return error so we
1309                          * can pass it down the stack */
1310                         RETURN(-ENOSYS);
1311                 sval = strchr(key, '=');
1312                 if (!sval || (*(sval + 1) == 0)) {
1313                         CERROR("Can't parse param %s (missing '=')\n", key);
1314                         /* rc = -EINVAL;        continue parsing other params */
1315                         continue;
1316                 }
1317                 keylen = sval - key;
1318                 sval++;
1319                 vallen = strlen(sval);
1320                 matched = 0;
1321                 j = 0;
1322                 /* Search proc entries */
1323                 while (lvars[j].name) {
1324                         var = &lvars[j];
1325                         if (class_match_param(key, var->name, NULL) == 0 &&
1326                             keylen == strlen(var->name)) {
1327                                 matched++;
1328                                 rc = -EROFS;
1329
1330                                 if (var->fops && var->fops->write) {
1331                                         mm_segment_t oldfs;
1332                                         oldfs = get_fs();
1333                                         set_fs(KERNEL_DS);
1334                                         rc = (var->fops->write)(&fakefile, sval,
1335                                                                 vallen, NULL);
1336                                         set_fs(oldfs);
1337                                 }
1338                                 break;
1339                         }
1340                         j++;
1341                 }
1342                 if (!matched) {
1343                         CERROR("%.*s: %s unknown param %s\n",
1344                                (int)strlen(prefix) - 1, prefix,
1345                                (char *)lustre_cfg_string(lcfg, 0), key);
1346                         /* rc = -EINVAL;        continue parsing other params */
1347                         skip++;
1348                 } else if (rc < 0) {
1349                         CERROR("%s: error writing proc entry '%s': rc = %d\n",
1350                                prefix, var->name, rc);
1351                         rc = 0;
1352                 } else {
1353                         CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1354                                          lustre_cfg_string(lcfg, 0),
1355                                          (int)strlen(prefix) - 1, prefix,
1356                                          (int)(sval - key - 1), key, sval);
1357                 }
1358         }
1359
1360         if (rc > 0)
1361                 rc = 0;
1362         if (!rc && skip)
1363                 rc = skip;
1364         RETURN(rc);
1365 }
1366 EXPORT_SYMBOL(class_process_proc_param);
1367
1368 /*
1369  * Supplemental functions for config logs, it allocates lustre_cfg
1370  * buffers plus initialized llog record header at the beginning.
1371  */
1372 struct llog_cfg_rec *lustre_cfg_rec_new(int cmd, struct lustre_cfg_bufs *bufs)
1373 {
1374         struct llog_cfg_rec     *lcr;
1375         int                      reclen;
1376
1377         ENTRY;
1378
1379         reclen = lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen);
1380         reclen = llog_data_len(reclen) + sizeof(struct llog_rec_hdr) +
1381                  sizeof(struct llog_rec_tail);
1382
1383         OBD_ALLOC(lcr, reclen);
1384         if (lcr == NULL)
1385                 RETURN(NULL);
1386
1387         lustre_cfg_init(&lcr->lcr_cfg, cmd, bufs);
1388
1389         lcr->lcr_hdr.lrh_len = reclen;
1390         lcr->lcr_hdr.lrh_type = OBD_CFG_REC;
1391
1392         RETURN(lcr);
1393 }
1394 EXPORT_SYMBOL(lustre_cfg_rec_new);
1395
1396 void lustre_cfg_rec_free(struct llog_cfg_rec *lcr)
1397 {
1398         ENTRY;
1399         OBD_FREE(lcr, lcr->lcr_hdr.lrh_len);
1400         EXIT;
1401 }
1402 EXPORT_SYMBOL(lustre_cfg_rec_free);
1403
1404 /** Parse a configuration llog, doing various manipulations on them
1405  * for various reasons, (modifications for compatibility, skip obsolete
1406  * records, change uuids, etc), then class_process_config() resulting
1407  * net records.
1408  */
1409 int class_config_llog_handler(const struct lu_env *env,
1410                               struct llog_handle *handle,
1411                               struct llog_rec_hdr *rec, void *data)
1412 {
1413         struct config_llog_instance *clli = data;
1414         int cfg_len = rec->lrh_len;
1415         char *cfg_buf = (char*) (rec + 1);
1416         int rc = 0;
1417         ENTRY;
1418
1419         //class_config_dump_handler(handle, rec, data);
1420
1421         switch (rec->lrh_type) {
1422         case OBD_CFG_REC: {
1423                 struct lustre_cfg *lcfg, *lcfg_new;
1424                 struct lustre_cfg_bufs bufs;
1425                 char *inst_name = NULL;
1426                 int inst_len = 0;
1427                 int inst = 0, swab = 0;
1428
1429                 lcfg = (struct lustre_cfg *)cfg_buf;
1430                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1431                         lustre_swab_lustre_cfg(lcfg);
1432                         swab = 1;
1433                 }
1434
1435                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1436                 if (rc)
1437                         GOTO(out, rc);
1438
1439                 /* Figure out config state info */
1440                 if (lcfg->lcfg_command == LCFG_MARKER) {
1441                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1442                         lustre_swab_cfg_marker(marker, swab,
1443                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1444                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1445                                clli->cfg_flags, marker->cm_flags);
1446                         if (marker->cm_flags & CM_START) {
1447                                 /* all previous flags off */
1448                                 clli->cfg_flags = CFG_F_MARKER;
1449                                 server_name2index(marker->cm_tgtname,
1450                                                   &clli->cfg_lwp_idx, NULL);
1451                                 if (marker->cm_flags & CM_SKIP) {
1452                                         clli->cfg_flags |= CFG_F_SKIP;
1453                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1454                                                marker->cm_step);
1455                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1456                                            (clli->cfg_sb &&
1457                                             lustre_check_exclusion(clli->cfg_sb,
1458                                                          marker->cm_tgtname))) {
1459                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1460                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1461                                                marker->cm_step);
1462                                 }
1463                         } else if (marker->cm_flags & CM_END) {
1464                                 clli->cfg_flags = 0;
1465                         }
1466                 }
1467                 /* A config command without a start marker before it is
1468                    illegal (post 146) */
1469                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1470                     !(clli->cfg_flags & CFG_F_MARKER) &&
1471                     (lcfg->lcfg_command != LCFG_MARKER)) {
1472                         CWARN("Config not inside markers, ignoring! "
1473                               "(inst: %p, uuid: %s, flags: %#x)\n",
1474                               clli->cfg_instance,
1475                               clli->cfg_uuid.uuid, clli->cfg_flags);
1476                         clli->cfg_flags |= CFG_F_SKIP;
1477                 }
1478                 if (clli->cfg_flags & CFG_F_SKIP) {
1479                         CDEBUG(D_CONFIG, "skipping %#x\n",
1480                                clli->cfg_flags);
1481                         rc = 0;
1482                         /* No processing! */
1483                         break;
1484                 }
1485
1486                 /*
1487                  * For interoperability between 1.8 and 2.0,
1488                  * rename "mds" obd device type to "mdt".
1489                  */
1490                 {
1491                         char *typename = lustre_cfg_string(lcfg, 1);
1492                         char *index = lustre_cfg_string(lcfg, 2);
1493
1494                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1495                              strcmp(typename, "mds") == 0)) {
1496                                 CWARN("For 1.8 interoperability, rename obd "
1497                                        "type from mds to mdt\n");
1498                                 typename[2] = 't';
1499                         }
1500                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1501                              strcmp(index, "type") == 0)) {
1502                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1503                                        "set this index to '0'\n");
1504                                 index[0] = '0';
1505                                 index[1] = 0;
1506                         }
1507                 }
1508
1509 #ifdef HAVE_SERVER_SUPPORT
1510                 /* newer MDS replaces LOV/OSC with LOD/OSP */
1511                 {
1512                         char *typename = lustre_cfg_string(lcfg, 1);
1513
1514                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1515                             strcmp(typename, LUSTRE_LOV_NAME) == 0) &&
1516                             IS_MDT(s2lsi(clli->cfg_sb))) {
1517                                 CDEBUG(D_CONFIG,
1518                                        "For 2.x interoperability, rename obd "
1519                                        "type from lov to lod (%s)\n",
1520                                        s2lsi(clli->cfg_sb)->lsi_svname);
1521                                 strcpy(typename, LUSTRE_LOD_NAME);
1522                         }
1523                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1524                             strcmp(typename, LUSTRE_OSC_NAME) == 0) &&
1525                             IS_MDT(s2lsi(clli->cfg_sb))) {
1526                                 CDEBUG(D_CONFIG,
1527                                        "For 2.x interoperability, rename obd "
1528                                        "type from osc to osp (%s)\n",
1529                                        s2lsi(clli->cfg_sb)->lsi_svname);
1530                                 strcpy(typename, LUSTRE_OSP_NAME);
1531                         }
1532                 }
1533 #endif /* HAVE_SERVER_SUPPORT */
1534
1535                 if (clli->cfg_flags & CFG_F_EXCLUDE) {
1536                         CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
1537                                lcfg->lcfg_command);
1538                         if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
1539                                 /* Add inactive instead */
1540                                 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1541                 }
1542
1543                 lustre_cfg_bufs_init(&bufs, lcfg);
1544
1545                 if (clli && clli->cfg_instance &&
1546                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1547                         inst = 1;
1548                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1549                                    sizeof(clli->cfg_instance) * 2 + 4;
1550                         OBD_ALLOC(inst_name, inst_len);
1551                         if (inst_name == NULL)
1552                                 GOTO(out, rc = -ENOMEM);
1553                         sprintf(inst_name, "%s-%p",
1554                                 lustre_cfg_string(lcfg, 0),
1555                                 clli->cfg_instance);
1556                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1557                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1558                                lcfg->lcfg_command, inst_name);
1559                 }
1560
1561                 /* we override the llog's uuid for clients, to insure they
1562                 are unique */
1563                 if (clli && clli->cfg_instance != NULL &&
1564                     lcfg->lcfg_command == LCFG_ATTACH) {
1565                         lustre_cfg_bufs_set_string(&bufs, 2,
1566                                                    clli->cfg_uuid.uuid);
1567                 }
1568                 /*
1569                  * sptlrpc config record, we expect 2 data segments:
1570                  *  [0]: fs_name/target_name,
1571                  *  [1]: rule string
1572                  * moving them to index [1] and [2], and insert MGC's
1573                  * obdname at index [0].
1574                  */
1575                 if (clli && clli->cfg_instance == NULL &&
1576                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1577                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1578                                             bufs.lcfg_buflen[1]);
1579                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1580                                             bufs.lcfg_buflen[0]);
1581                         lustre_cfg_bufs_set_string(&bufs, 0,
1582                                                    clli->cfg_obdname);
1583                 }
1584
1585                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1586                 if (lcfg_new == NULL)
1587                         GOTO(out, rc = -ENOMEM);
1588
1589                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1590                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1591
1592                 /* XXX Hack to try to remain binary compatible with
1593                  * pre-newconfig logs */
1594                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1595                     (lcfg->lcfg_nid >> 32) == 0) {
1596                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1597
1598                         lcfg_new->lcfg_nid =
1599                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1600                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1601                               lcfg->lcfg_nal, addr,
1602                               libcfs_nid2str(lcfg_new->lcfg_nid));
1603                 } else {
1604                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1605                 }
1606
1607                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1608
1609                 rc = class_process_config(lcfg_new);
1610                 lustre_cfg_free(lcfg_new);
1611
1612                 if (inst)
1613                         OBD_FREE(inst_name, inst_len);
1614                 break;
1615         }
1616         default:
1617                 CERROR("Unknown llog record type %#x encountered\n",
1618                        rec->lrh_type);
1619                 break;
1620         }
1621 out:
1622         if (rc) {
1623                 CERROR("%s: cfg command failed: rc = %d\n",
1624                        handle->lgh_ctxt->loc_obd->obd_name, rc);
1625                 class_config_dump_handler(NULL, handle, rec, data);
1626         }
1627         RETURN(rc);
1628 }
1629 EXPORT_SYMBOL(class_config_llog_handler);
1630
1631 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1632                             char *name, struct config_llog_instance *cfg)
1633 {
1634         struct llog_process_cat_data     cd = {0, 0};
1635         struct llog_handle              *llh;
1636         llog_cb_t                        callback;
1637         int                              rc;
1638         ENTRY;
1639
1640         CDEBUG(D_INFO, "looking up llog %s\n", name);
1641         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1642         if (rc)
1643                 RETURN(rc);
1644
1645         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1646         if (rc)
1647                 GOTO(parse_out, rc);
1648
1649         /* continue processing from where we last stopped to end-of-log */
1650         if (cfg) {
1651                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1652                 callback = cfg->cfg_callback;
1653                 LASSERT(callback != NULL);
1654         } else {
1655                 callback = class_config_llog_handler;
1656         }
1657
1658         cd.lpcd_last_idx = 0;
1659
1660         rc = llog_process(env, llh, callback, cfg, &cd);
1661
1662         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1663                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1664         if (cfg)
1665                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1666
1667 parse_out:
1668         llog_close(env, llh);
1669         RETURN(rc);
1670 }
1671 EXPORT_SYMBOL(class_config_parse_llog);
1672
1673 static struct lcfg_type_data {
1674         __u32    ltd_type;
1675         char    *ltd_name;
1676         char    *ltd_bufs[4];
1677 } lcfg_data_table[] = {
1678         { LCFG_ATTACH, "attach", { "type", "UUID", "3", "4" } },
1679         { LCFG_DETACH, "detach", { "1", "2", "3", "4" } },
1680         { LCFG_SETUP, "setup", { "UUID", "node", "options", "failout" } },
1681         { LCFG_CLEANUP, "cleanup", { "1", "2", "3", "4" } },
1682         { LCFG_ADD_UUID, "add_uuid", { "node", "2", "3", "4" }  },
1683         { LCFG_DEL_UUID, "del_uuid", { "1", "2", "3", "4" }  },
1684         { LCFG_MOUNTOPT, "new_profile", { "name", "lov", "lmv", "4" }  },
1685         { LCFG_DEL_MOUNTOPT, "del_mountopt", { "1", "2", "3", "4" } , },
1686         { LCFG_SET_TIMEOUT, "set_timeout", { "parameter", "2", "3", "4" }  },
1687         { LCFG_SET_UPCALL, "set_upcall", { "1", "2", "3", "4" }  },
1688         { LCFG_ADD_CONN, "add_conn", { "node", "2", "3", "4" }  },
1689         { LCFG_DEL_CONN, "del_conn", { "1", "2", "3", "4" }  },
1690         { LCFG_LOV_ADD_OBD, "add_osc", { "ost", "index", "gen", "UUID" } },
1691         { LCFG_LOV_DEL_OBD, "del_osc", { "1", "2", "3", "4" } },
1692         { LCFG_PARAM, "set_param", { "parameter", "value", "3", "4" } },
1693         { LCFG_MARKER, "marker", { "1", "2", "3", "4" } },
1694         { LCFG_LOG_START, "log_start", { "1", "2", "3", "4" } },
1695         { LCFG_LOG_END, "log_end", { "1", "2", "3", "4" } },
1696         { LCFG_LOV_ADD_INA, "add_osc_inactive", { "1", "2", "3", "4" }  },
1697         { LCFG_ADD_MDC, "add_mdc", { "mdt", "index", "gen", "UUID" } },
1698         { LCFG_DEL_MDC, "del_mdc", { "1", "2", "3", "4" } },
1699         { LCFG_SPTLRPC_CONF, "security", { "parameter", "2", "3", "4" } },
1700         { LCFG_POOL_NEW, "new_pool", { "fsname", "pool", "3", "4" }  },
1701         { LCFG_POOL_ADD, "add_pool", { "fsname", "pool", "ost", "4" } },
1702         { LCFG_POOL_REM, "remove_pool", { "fsname", "pool", "ost", "4" } },
1703         { LCFG_POOL_DEL, "del_pool", { "fsname", "pool", "3", "4" } },
1704         { LCFG_SET_LDLM_TIMEOUT, "set_ldlm_timeout",
1705           { "parameter", "2", "3", "4" } },
1706         { 0, NULL, { NULL, NULL, NULL, NULL } }
1707 };
1708
1709 static struct lcfg_type_data *lcfg_cmd2data(__u32 cmd)
1710 {
1711         int i = 0;
1712
1713         while (lcfg_data_table[i].ltd_type != 0) {
1714                 if (lcfg_data_table[i].ltd_type == cmd)
1715                         return &lcfg_data_table[i];
1716                 i++;
1717         }
1718         return NULL;
1719 }
1720
1721 /**
1722  * parse config record and output dump in supplied buffer.
1723  * This is separated from class_config_dump_handler() to use
1724  * for ioctl needs as well
1725  *
1726  * Sample Output:
1727  * - { event: attach, device: lustrewt-clilov, type: lov, UUID:
1728  *     lustrewt-clilov_UUID }
1729  */
1730 int class_config_yaml_output(struct llog_rec_hdr *rec, char *buf, int size)
1731 {
1732         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1733         char                    *ptr = buf;
1734         char                    *end = buf + size;
1735         int                      rc = 0, i;
1736         struct lcfg_type_data   *ldata;
1737
1738         LASSERT(rec->lrh_type == OBD_CFG_REC);
1739         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1740         if (rc < 0)
1741                 return rc;
1742
1743         ldata = lcfg_cmd2data(lcfg->lcfg_command);
1744         if (ldata == NULL)
1745                 return -ENOTTY;
1746
1747         if (lcfg->lcfg_command == LCFG_MARKER)
1748                 return 0;
1749
1750         /* form YAML entity */
1751         ptr += snprintf(ptr, end - ptr, "- { event: %s", ldata->ltd_name);
1752
1753         if (lcfg->lcfg_flags)
1754                 ptr += snprintf(ptr, end - ptr, ", flags: %#08x",
1755                                 lcfg->lcfg_flags);
1756         if (lcfg->lcfg_num)
1757                 ptr += snprintf(ptr, end - ptr, ", num: %#08x",
1758                                 lcfg->lcfg_num);
1759         if (lcfg->lcfg_nid) {
1760                 char nidstr[LNET_NIDSTR_SIZE];
1761
1762                 libcfs_nid2str_r(lcfg->lcfg_nid, nidstr, sizeof(nidstr));
1763                 ptr += snprintf(ptr, end - ptr, ", nid: %s("LPX64")",
1764                                 nidstr, lcfg->lcfg_nid);
1765         }
1766
1767         if (LUSTRE_CFG_BUFLEN(lcfg, 0) > 0)
1768                 ptr += snprintf(ptr, end - ptr, ", device: %s",
1769                                 lustre_cfg_string(lcfg, 0));
1770
1771         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1772                 if (LUSTRE_CFG_BUFLEN(lcfg, i) > 0)
1773                         ptr += snprintf(ptr, end - ptr, ", %s: %s",
1774                                         ldata->ltd_bufs[i - 1],
1775                                         lustre_cfg_string(lcfg, i));
1776         }
1777
1778         ptr += snprintf(ptr, end - ptr, " }\n");
1779         /* return consumed bytes */
1780         rc = ptr - buf;
1781         return rc;
1782 }
1783
1784 /**
1785  * parse config record and output dump in supplied buffer.
1786  * This is separated from class_config_dump_handler() to use
1787  * for ioctl needs as well
1788  */
1789 static int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
1790 {
1791         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1792         char                    *ptr = buf;
1793         char                    *end = buf + size;
1794         int                      rc = 0;
1795
1796         ENTRY;
1797
1798         LASSERT(rec->lrh_type == OBD_CFG_REC);
1799         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1800         if (rc < 0)
1801                 RETURN(rc);
1802
1803         ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
1804         if (lcfg->lcfg_flags)
1805                 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1806                                 lcfg->lcfg_flags);
1807
1808         if (lcfg->lcfg_num)
1809                 ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
1810
1811         if (lcfg->lcfg_nid) {
1812                 char nidstr[LNET_NIDSTR_SIZE];
1813
1814                 libcfs_nid2str_r(lcfg->lcfg_nid, nidstr, sizeof(nidstr));
1815                 ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1816                                 nidstr, lcfg->lcfg_nid);
1817         }
1818
1819         if (lcfg->lcfg_command == LCFG_MARKER) {
1820                 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1821
1822                 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1823                                 marker->cm_step, marker->cm_flags,
1824                                 marker->cm_tgtname, marker->cm_comment);
1825         } else {
1826                 int i;
1827
1828                 for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1829                         ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1830                                         lustre_cfg_string(lcfg, i));
1831                 }
1832         }
1833         ptr += snprintf(ptr, end - ptr, "\n");
1834         /* return consumed bytes */
1835         rc = ptr - buf;
1836         RETURN(rc);
1837 }
1838
1839 int class_config_dump_handler(const struct lu_env *env,
1840                               struct llog_handle *handle,
1841                               struct llog_rec_hdr *rec, void *data)
1842 {
1843         char    *outstr;
1844         int      rc = 0;
1845
1846         ENTRY;
1847
1848         OBD_ALLOC(outstr, 256);
1849         if (outstr == NULL)
1850                 RETURN(-ENOMEM);
1851
1852         if (rec->lrh_type == OBD_CFG_REC) {
1853                 class_config_parse_rec(rec, outstr, 256);
1854                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1855         } else {
1856                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1857                 rc = -EINVAL;
1858         }
1859
1860         OBD_FREE(outstr, 256);
1861         RETURN(rc);
1862 }
1863
1864 int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1865                            char *name, struct config_llog_instance *cfg)
1866 {
1867         struct llog_handle      *llh;
1868         int                      rc;
1869
1870         ENTRY;
1871
1872         LCONSOLE_INFO("Dumping config log %s\n", name);
1873
1874         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1875         if (rc)
1876                 RETURN(rc);
1877
1878         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1879         if (rc)
1880                 GOTO(parse_out, rc);
1881
1882         rc = llog_process(env, llh, class_config_dump_handler, cfg, NULL);
1883 parse_out:
1884         llog_close(env, llh);
1885
1886         LCONSOLE_INFO("End config log %s\n", name);
1887         RETURN(rc);
1888 }
1889 EXPORT_SYMBOL(class_config_dump_llog);
1890
1891 /** Call class_cleanup and class_detach.
1892  * "Manual" only in the sense that we're faking lcfg commands.
1893  */
1894 int class_manual_cleanup(struct obd_device *obd)
1895 {
1896         char                    flags[3] = "";
1897         struct lustre_cfg      *lcfg;
1898         struct lustre_cfg_bufs  bufs;
1899         int                     rc;
1900         ENTRY;
1901
1902         if (!obd) {
1903                 CERROR("empty cleanup\n");
1904                 RETURN(-EALREADY);
1905         }
1906
1907         if (obd->obd_force)
1908                 strcat(flags, "F");
1909         if (obd->obd_fail)
1910                 strcat(flags, "A");
1911
1912         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1913                obd->obd_name, flags);
1914
1915         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1916         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1917         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1918         if (lcfg == NULL)
1919                 RETURN(-ENOMEM);
1920
1921         rc = class_process_config(lcfg);
1922         if (rc) {
1923                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1924                 GOTO(out, rc);
1925         }
1926
1927         /* the lcfg is almost the same for both ops */
1928         lcfg->lcfg_command = LCFG_DETACH;
1929         rc = class_process_config(lcfg);
1930         if (rc)
1931                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1932 out:
1933         lustre_cfg_free(lcfg);
1934         RETURN(rc);
1935 }
1936 EXPORT_SYMBOL(class_manual_cleanup);
1937
1938 /*
1939  * uuid<->export lustre hash operations
1940  */
1941
1942 static unsigned
1943 uuid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
1944 {
1945         return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
1946                                   sizeof(((struct obd_uuid *)key)->uuid), mask);
1947 }
1948
1949 static void *
1950 uuid_key(struct hlist_node *hnode)
1951 {
1952         struct obd_export *exp;
1953
1954         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1955
1956         return &exp->exp_client_uuid;
1957 }
1958
1959 /*
1960  * NOTE: It is impossible to find an export that is in failed
1961  *       state with this function
1962  */
1963 static int
1964 uuid_keycmp(const void *key, struct hlist_node *hnode)
1965 {
1966         struct obd_export *exp;
1967
1968         LASSERT(key);
1969         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1970
1971         return obd_uuid_equals(key, &exp->exp_client_uuid) &&
1972                !exp->exp_failed;
1973 }
1974
1975 static void *
1976 uuid_export_object(struct hlist_node *hnode)
1977 {
1978         return hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1979 }
1980
1981 static void
1982 uuid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
1983 {
1984         struct obd_export *exp;
1985
1986         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1987         class_export_get(exp);
1988 }
1989
1990 static void
1991 uuid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
1992 {
1993         struct obd_export *exp;
1994
1995         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1996         class_export_put(exp);
1997 }
1998
1999 static struct cfs_hash_ops uuid_hash_ops = {
2000         .hs_hash        = uuid_hash,
2001         .hs_key         = uuid_key,
2002         .hs_keycmp      = uuid_keycmp,
2003         .hs_object      = uuid_export_object,
2004         .hs_get         = uuid_export_get,
2005         .hs_put_locked  = uuid_export_put_locked,
2006 };
2007
2008
2009 /*
2010  * nid<->export hash operations
2011  */
2012
2013 static unsigned
2014 nid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
2015 {
2016         return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
2017 }
2018
2019 static void *
2020 nid_key(struct hlist_node *hnode)
2021 {
2022         struct obd_export *exp;
2023
2024         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2025
2026         RETURN(&exp->exp_connection->c_peer.nid);
2027 }
2028
2029 /*
2030  * NOTE: It is impossible to find an export that is in failed
2031  *       state with this function
2032  */
2033 static int
2034 nid_kepcmp(const void *key, struct hlist_node *hnode)
2035 {
2036         struct obd_export *exp;
2037
2038         LASSERT(key);
2039         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2040
2041         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
2042                !exp->exp_failed);
2043 }
2044
2045 static void *
2046 nid_export_object(struct hlist_node *hnode)
2047 {
2048         return hlist_entry(hnode, struct obd_export, exp_nid_hash);
2049 }
2050
2051 static void
2052 nid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
2053 {
2054         struct obd_export *exp;
2055
2056         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2057         class_export_get(exp);
2058 }
2059
2060 static void
2061 nid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2062 {
2063         struct obd_export *exp;
2064
2065         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2066         class_export_put(exp);
2067 }
2068
2069 static struct cfs_hash_ops nid_hash_ops = {
2070         .hs_hash        = nid_hash,
2071         .hs_key         = nid_key,
2072         .hs_keycmp      = nid_kepcmp,
2073         .hs_object      = nid_export_object,
2074         .hs_get         = nid_export_get,
2075         .hs_put_locked  = nid_export_put_locked,
2076 };
2077
2078
2079 /*
2080  * nid<->nidstats hash operations
2081  */
2082
2083 static void *
2084 nidstats_key(struct hlist_node *hnode)
2085 {
2086         struct nid_stat *ns;
2087
2088         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2089
2090         return &ns->nid;
2091 }
2092
2093 static int
2094 nidstats_keycmp(const void *key, struct hlist_node *hnode)
2095 {
2096         return *(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key;
2097 }
2098
2099 static void *
2100 nidstats_object(struct hlist_node *hnode)
2101 {
2102         return hlist_entry(hnode, struct nid_stat, nid_hash);
2103 }
2104
2105 static void
2106 nidstats_get(struct cfs_hash *hs, struct hlist_node *hnode)
2107 {
2108         struct nid_stat *ns;
2109
2110         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2111         nidstat_getref(ns);
2112 }
2113
2114 static void
2115 nidstats_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2116 {
2117         struct nid_stat *ns;
2118
2119         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2120         nidstat_putref(ns);
2121 }
2122
2123 static struct cfs_hash_ops nid_stat_hash_ops = {
2124         .hs_hash        = nid_hash,
2125         .hs_key         = nidstats_key,
2126         .hs_keycmp      = nidstats_keycmp,
2127         .hs_object      = nidstats_object,
2128         .hs_get         = nidstats_get,
2129         .hs_put_locked  = nidstats_put_locked,
2130 };
2131
2132
2133 /*
2134  * client_generation<->export hash operations
2135  */
2136
2137 static unsigned
2138 gen_hash(struct cfs_hash *hs, const void *key, unsigned mask)
2139 {
2140         return cfs_hash_djb2_hash(key, sizeof(__u32), mask);
2141 }
2142
2143 static void *
2144 gen_key(struct hlist_node *hnode)
2145 {
2146         struct obd_export *exp;
2147
2148         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2149
2150         RETURN(&exp->exp_target_data.ted_lcd->lcd_generation);
2151 }
2152
2153 /*
2154  * NOTE: It is impossible to find an export that is in failed
2155  *       state with this function
2156  */
2157 static int
2158 gen_kepcmp(const void *key, struct hlist_node *hnode)
2159 {
2160         struct obd_export *exp;
2161
2162         LASSERT(key);
2163         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2164
2165         RETURN(exp->exp_target_data.ted_lcd->lcd_generation == *(__u32 *)key &&
2166                !exp->exp_failed);
2167 }
2168
2169 static void *
2170 gen_export_object(struct hlist_node *hnode)
2171 {
2172         return hlist_entry(hnode, struct obd_export, exp_gen_hash);
2173 }
2174
2175 static void
2176 gen_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
2177 {
2178         struct obd_export *exp;
2179
2180         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2181         class_export_get(exp);
2182 }
2183
2184 static void
2185 gen_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2186 {
2187         struct obd_export *exp;
2188
2189         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2190         class_export_put(exp);
2191 }
2192
2193 static struct cfs_hash_ops gen_hash_ops = {
2194         .hs_hash        = gen_hash,
2195         .hs_key         = gen_key,
2196         .hs_keycmp      = gen_kepcmp,
2197         .hs_object      = gen_export_object,
2198         .hs_get         = gen_export_get,
2199         .hs_put_locked  = gen_export_put_locked,
2200 };