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);
 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 static DEFINE_SPINLOCK(lustre_profile_list_lock);
 840
 841 struct lustre_profile *class_get_profile(const char * prof)
 842 {
 843         struct lustre_profile *lprof;
 844
 845         ENTRY;
 846         spin_lock(&lustre_profile_list_lock);
 847         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 848                 if (!strcmp(lprof->lp_profile, prof)) {
 849                         lprof->lp_refs++;
 850                         spin_unlock(&lustre_profile_list_lock);
 851                         RETURN(lprof);
 852                 }
 853         }
 854         spin_unlock(&lustre_profile_list_lock);
 855         RETURN(NULL);
 856 }
 857 EXPORT_SYMBOL(class_get_profile);
 858
 859 /** Create a named "profile".
 860  * This defines the mdc and osc names to use for a client.
 861  * This also is used to define the lov to be used by a mdt.
 862  */
 863 static int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 864                              int mdclen, char *mdc)
 865 {
 866         struct lustre_profile *lprof;
 867         int err = 0;
 868         ENTRY;
 869
 870         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 871
 872         OBD_ALLOC(lprof, sizeof(*lprof));
 873         if (lprof == NULL)
 874                 RETURN(-ENOMEM);
 875         INIT_LIST_HEAD(&lprof->lp_list);
 876
 877         LASSERT(proflen == (strlen(prof) + 1));
 878         OBD_ALLOC(lprof->lp_profile, proflen);
 879         if (lprof->lp_profile == NULL)
 880                 GOTO(out, err = -ENOMEM);
 881         memcpy(lprof->lp_profile, prof, proflen);
 882
 883         LASSERT(osclen == (strlen(osc) + 1));
 884         OBD_ALLOC(lprof->lp_dt, osclen);
 885         if (lprof->lp_dt == NULL)
 886                 GOTO(out, err = -ENOMEM);
 887         memcpy(lprof->lp_dt, osc, osclen);
 888
 889         if (mdclen > 0) {
 890                 LASSERT(mdclen == (strlen(mdc) + 1));
 891                 OBD_ALLOC(lprof->lp_md, mdclen);
 892                 if (lprof->lp_md == NULL)
 893                         GOTO(out, err = -ENOMEM);
 894                 memcpy(lprof->lp_md, mdc, mdclen);
 895         }
 896
 897         spin_lock(&lustre_profile_list_lock);
 898         lprof->lp_refs = 1;
 899         lprof->lp_list_deleted = false;
 900
 901         list_add(&lprof->lp_list, &lustre_profile_list);
 902         spin_unlock(&lustre_profile_list_lock);
 903         RETURN(err);
 904
 905 out:
 906         if (lprof->lp_md)
 907                 OBD_FREE(lprof->lp_md, mdclen);
 908         if (lprof->lp_dt)
 909                 OBD_FREE(lprof->lp_dt, osclen);
 910         if (lprof->lp_profile)
 911                 OBD_FREE(lprof->lp_profile, proflen);
 912         OBD_FREE(lprof, sizeof(*lprof));
 913         RETURN(err);
 914 }
 915
 916 void class_del_profile(const char *prof)
 917 {
 918         struct lustre_profile *lprof;
 919         ENTRY;
 920
 921         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 922
 923         lprof = class_get_profile(prof);
 924         if (lprof) {
 925                 spin_lock(&lustre_profile_list_lock);
 926                 /* because get profile increments the ref counter */
 927                 lprof->lp_refs--;
 928                 list_del(&lprof->lp_list);
 929                 lprof->lp_list_deleted = true;
 930                 spin_unlock(&lustre_profile_list_lock);
 931
 932                 class_put_profile(lprof);
 933         }
 934         EXIT;
 935 }
 936 EXPORT_SYMBOL(class_del_profile);
 937
 938 void class_put_profile(struct lustre_profile *lprof)
 939 {
 940         spin_lock(&lustre_profile_list_lock);
 941         if ((--lprof->lp_refs) > 0) {
 942                 LASSERT(lprof->lp_refs > 0);
 943                 spin_unlock(&lustre_profile_list_lock);
 944                 return;
 945         }
 946         spin_unlock(&lustre_profile_list_lock);
 947
 948         /* confirm not a negative number */
 949         LASSERT(lprof->lp_refs == 0);
 950
 951         /* At least one class_del_profile/profiles must be called
 952          * on the target profile or lustre_profile_list will corrupt */
 953         LASSERT(lprof->lp_list_deleted);
 954         OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 955         OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 956         if (lprof->lp_md != NULL)
 957                 OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 958         OBD_FREE(lprof, sizeof(*lprof));
 959 }
 960 EXPORT_SYMBOL(class_put_profile);
 961
 962 /* COMPAT_146 */
 963 void class_del_profiles(void)
 964 {
 965         struct lustre_profile *lprof, *n;
 966         ENTRY;
 967
 968         spin_lock(&lustre_profile_list_lock);
 969         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 970                 list_del(&lprof->lp_list);
 971                 lprof->lp_list_deleted = true;
 972                 spin_unlock(&lustre_profile_list_lock);
 973
 974                 class_put_profile(lprof);
 975
 976                 spin_lock(&lustre_profile_list_lock);
 977         }
 978         spin_unlock(&lustre_profile_list_lock);
 979         EXIT;
 980 }
 981 EXPORT_SYMBOL(class_del_profiles);
 982
 983 static int class_set_global(char *ptr, int val, struct lustre_cfg *lcfg)
 984 {
 985         ENTRY;
 986         if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
 987                 at_min = val;
 988         else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
 989                 at_max = val;
 990         else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
 991                 at_extra = val;
 992         else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
 993                 at_early_margin = val;
 994         else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
 995                 at_history = val;
 996         else if (class_match_param(ptr, PARAM_JOBID_VAR, NULL) == 0)
 997                 strlcpy(obd_jobid_var, lustre_cfg_string(lcfg, 2),
 998                         JOBSTATS_JOBID_VAR_MAX_LEN + 1);
 999         else
1000                 RETURN(-EINVAL);
1001
1002         CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
1003         RETURN(0);
1004 }
1005
1006
1007 /* We can't call ll_process_config or lquota_process_config directly because
1008  * it lives in a module that must be loaded after this one. */
1009 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
1010 static int (*quota_process_config)(struct lustre_cfg *lcfg) = NULL;
1011
1012 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
1013 {
1014         client_process_config = cpc;
1015 }
1016 EXPORT_SYMBOL(lustre_register_client_process_config);
1017
1018 /**
1019  * Rename the proc parameter in \a cfg with a new name \a new_name.
1020  *
1021  * \param cfg      config structure which contains the proc parameter
1022  * \param new_name new name of the proc parameter
1023  *
1024  * \retval valid-pointer    pointer to the newly-allocated config structure
1025  *                          which contains the renamed proc parameter
1026  * \retval ERR_PTR(-EINVAL) if \a cfg or \a new_name is NULL, or \a cfg does
1027  *                          not contain a proc parameter
1028  * \retval ERR_PTR(-ENOMEM) if memory allocation failure occurs
1029  */
1030 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
1031                                      const char *new_name)
1032 {
1033         struct lustre_cfg_bufs  *bufs = NULL;
1034         struct lustre_cfg       *new_cfg = NULL;
1035         char                    *param = NULL;
1036         char                    *new_param = NULL;
1037         char                    *value = NULL;
1038         int                      name_len = 0;
1039         int                      new_len = 0;
1040         ENTRY;
1041
1042         if (cfg == NULL || new_name == NULL)
1043                 RETURN(ERR_PTR(-EINVAL));
1044
1045         param = lustre_cfg_string(cfg, 1);
1046         if (param == NULL)
1047                 RETURN(ERR_PTR(-EINVAL));
1048
1049         value = strchr(param, '=');
1050         if (value == NULL)
1051                 name_len = strlen(param);
1052         else
1053                 name_len = value - param;
1054
1055         new_len = LUSTRE_CFG_BUFLEN(cfg, 1) + strlen(new_name) - name_len;
1056
1057         OBD_ALLOC(new_param, new_len);
1058         if (new_param == NULL)
1059                 RETURN(ERR_PTR(-ENOMEM));
1060
1061         strcpy(new_param, new_name);
1062         if (value != NULL)
1063                 strcat(new_param, value);
1064
1065         OBD_ALLOC_PTR(bufs);
1066         if (bufs == NULL) {
1067                 OBD_FREE(new_param, new_len);
1068                 RETURN(ERR_PTR(-ENOMEM));
1069         }
1070
1071         lustre_cfg_bufs_reset(bufs, NULL);
1072         lustre_cfg_bufs_init(bufs, cfg);
1073         lustre_cfg_bufs_set_string(bufs, 1, new_param);
1074
1075         new_cfg = lustre_cfg_new(cfg->lcfg_command, bufs);
1076         OBD_FREE(new_param, new_len);
1077         OBD_FREE_PTR(bufs);
1078         if (new_cfg == NULL)
1079                 RETURN(ERR_PTR(-ENOMEM));
1080
1081         new_cfg->lcfg_num = cfg->lcfg_num;
1082         new_cfg->lcfg_flags = cfg->lcfg_flags;
1083         new_cfg->lcfg_nid = cfg->lcfg_nid;
1084         new_cfg->lcfg_nal = cfg->lcfg_nal;
1085
1086         RETURN(new_cfg);
1087 }
1088 EXPORT_SYMBOL(lustre_cfg_rename);
1089
1090 static int process_param2_config(struct lustre_cfg *lcfg)
1091 {
1092         char *param = lustre_cfg_string(lcfg, 1);
1093         char *upcall = lustre_cfg_string(lcfg, 2);
1094         char *argv[] = {
1095                 [0] = "/usr/sbin/lctl",
1096                 [1] = "set_param",
1097                 [2] = param,
1098                 [3] = NULL
1099         };
1100         struct timeval  start;
1101         struct timeval  end;
1102         int             rc;
1103         ENTRY;
1104
1105         /* Add upcall processing here. Now only lctl is supported */
1106         if (strcmp(upcall, LCTL_UPCALL) != 0) {
1107                 CERROR("Unsupported upcall %s\n", upcall);
1108                 RETURN(-EINVAL);
1109         }
1110
1111         do_gettimeofday(&start);
1112         rc = call_usermodehelper(argv[0], argv, NULL, UMH_WAIT_PROC);
1113         do_gettimeofday(&end);
1114
1115         if (rc < 0) {
1116                 CERROR("lctl: error invoking upcall %s %s %s: rc = %d; "
1117                        "time %ldus\n", argv[0], argv[1], argv[2], rc,
1118                        cfs_timeval_sub(&end, &start, NULL));
1119         } else {
1120                 CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
1121                        argv[0], argv[1], argv[2],
1122                        cfs_timeval_sub(&end, &start, NULL));
1123                        rc = 0;
1124         }
1125
1126         RETURN(rc);
1127 }
1128
1129 void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
1130 {
1131         quota_process_config = qpc;
1132 }
1133 EXPORT_SYMBOL(lustre_register_quota_process_config);
1134
1135 /** Process configuration commands given in lustre_cfg form.
1136  * These may come from direct calls (e.g. class_manual_cleanup)
1137  * or processing the config llog, or ioctl from lctl.
1138  */
1139 int class_process_config(struct lustre_cfg *lcfg)
1140 {
1141         struct obd_device *obd;
1142         int err;
1143
1144         LASSERT(lcfg && !IS_ERR(lcfg));
1145         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
1146
1147         /* Commands that don't need a device */
1148         switch(lcfg->lcfg_command) {
1149         case LCFG_ATTACH: {
1150                 err = class_attach(lcfg);
1151                 GOTO(out, err);
1152         }
1153         case LCFG_ADD_UUID: {
1154                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
1155                        " (%s)\n", lustre_cfg_string(lcfg, 1),
1156                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
1157
1158                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
1159                 GOTO(out, err);
1160         }
1161         case LCFG_DEL_UUID: {
1162                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
1163                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
1164                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
1165
1166                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
1167                 GOTO(out, err);
1168         }
1169         case LCFG_MOUNTOPT: {
1170                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
1171                        lustre_cfg_string(lcfg, 1),
1172                        lustre_cfg_string(lcfg, 2),
1173                        lustre_cfg_string(lcfg, 3));
1174                 /* set these mount options somewhere, so ll_fill_super
1175                  * can find them. */
1176                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
1177                                         lustre_cfg_string(lcfg, 1),
1178                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
1179                                         lustre_cfg_string(lcfg, 2),
1180                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
1181                                         lustre_cfg_string(lcfg, 3));
1182                 GOTO(out, err);
1183         }
1184         case LCFG_DEL_MOUNTOPT: {
1185                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
1186                        lustre_cfg_string(lcfg, 1));
1187                 class_del_profile(lustre_cfg_string(lcfg, 1));
1188                 GOTO(out, err = 0);
1189         }
1190         case LCFG_SET_TIMEOUT: {
1191                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
1192                        obd_timeout, lcfg->lcfg_num);
1193                 obd_timeout = max(lcfg->lcfg_num, 1U);
1194                 obd_timeout_set = 1;
1195                 GOTO(out, err = 0);
1196         }
1197         case LCFG_SET_LDLM_TIMEOUT: {
1198                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
1199                        ldlm_timeout, lcfg->lcfg_num);
1200                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
1201                 if (ldlm_timeout >= obd_timeout)
1202                         ldlm_timeout = max(obd_timeout / 3, 1U);
1203                 ldlm_timeout_set = 1;
1204                 GOTO(out, err = 0);
1205         }
1206         case LCFG_SET_UPCALL: {
1207                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
1208                 /* COMPAT_146 Don't fail on old configs */
1209                 GOTO(out, err = 0);
1210         }
1211         case LCFG_MARKER: {
1212                 struct cfg_marker *marker;
1213                 marker = lustre_cfg_buf(lcfg, 1);
1214                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
1215                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
1216                 GOTO(out, err = 0);
1217         }
1218         case LCFG_PARAM: {
1219                 char *tmp;
1220                 /* llite has no obd */
1221                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
1222                                        PARAM_LLITE, NULL) == 0) &&
1223                     client_process_config) {
1224                         err = (*client_process_config)(lcfg);
1225                         GOTO(out, err);
1226                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1227                                               PARAM_SYS, &tmp) == 0)) {
1228                         /* Global param settings */
1229                         err = class_set_global(tmp, lcfg->lcfg_num, lcfg);
1230                         /*
1231                          * Client or server should not fail to mount if
1232                          * it hits an unknown configuration parameter.
1233                          */
1234                         if (err != 0)
1235                                 CWARN("Ignoring unknown param %s\n", tmp);
1236
1237                         GOTO(out, err = 0);
1238                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1239                                               PARAM_QUOTA, &tmp) == 0) &&
1240                            quota_process_config) {
1241                         err = (*quota_process_config)(lcfg);
1242                         GOTO(out, err);
1243                 }
1244
1245                 break;
1246         }
1247         case LCFG_SET_PARAM: {
1248                 err = process_param2_config(lcfg);
1249                 GOTO(out, err = 0);
1250         }
1251         }
1252         /* Commands that require a device */
1253         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1254         if (obd == NULL) {
1255                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
1256                         CERROR("this lcfg command requires a device name\n");
1257                 else
1258                         CERROR("no device for: %s\n",
1259                                lustre_cfg_string(lcfg, 0));
1260
1261                 GOTO(out, err = -EINVAL);
1262         }
1263
1264         switch(lcfg->lcfg_command) {
1265         case LCFG_SETUP: {
1266                 err = class_setup(obd, lcfg);
1267                 GOTO(out, err);
1268         }
1269         case LCFG_DETACH: {
1270                 err = class_detach(obd, lcfg);
1271                 GOTO(out, err = 0);
1272         }
1273         case LCFG_CLEANUP: {
1274                 err = class_cleanup(obd, lcfg);
1275                 GOTO(out, err = 0);
1276         }
1277         case LCFG_ADD_CONN: {
1278                 err = class_add_conn(obd, lcfg);
1279                 GOTO(out, err = 0);
1280         }
1281         case LCFG_DEL_CONN: {
1282                 err = class_del_conn(obd, lcfg);
1283                 GOTO(out, err = 0);
1284         }
1285         case LCFG_POOL_NEW: {
1286                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
1287                 GOTO(out, err = 0);
1288         }
1289         case LCFG_POOL_ADD: {
1290                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1291                                    lustre_cfg_string(lcfg, 3));
1292                 GOTO(out, err = 0);
1293         }
1294         case LCFG_POOL_REM: {
1295                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1296                                    lustre_cfg_string(lcfg, 3));
1297                 GOTO(out, err = 0);
1298         }
1299         case LCFG_POOL_DEL: {
1300                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
1301                 GOTO(out, err = 0);
1302         }
1303         default: {
1304                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
1305                 GOTO(out, err);
1306
1307         }
1308         }
1309 out:
1310         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
1311                 CWARN("Ignoring error %d on optional command %#x\n", err,
1312                       lcfg->lcfg_command);
1313                 err = 0;
1314         }
1315         return err;
1316 }
1317 EXPORT_SYMBOL(class_process_config);
1318
1319 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
1320                              struct lustre_cfg *lcfg, void *data)
1321 {
1322         struct lprocfs_vars *var;
1323         struct file fakefile;
1324         struct seq_file fake_seqfile;
1325         char *key, *sval;
1326         int i, keylen, vallen;
1327         int matched = 0, j = 0;
1328         int rc = 0;
1329         int skip = 0;
1330         ENTRY;
1331
1332         if (lcfg->lcfg_command != LCFG_PARAM) {
1333                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1334                 RETURN(-EINVAL);
1335         }
1336
1337         /* fake a seq file so that var->fops->write can work... */
1338         fakefile.private_data = &fake_seqfile;
1339         fake_seqfile.private = data;
1340         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1341            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1342            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1343         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1344                 key = lustre_cfg_buf(lcfg, i);
1345                 /* Strip off prefix */
1346                 if (class_match_param(key, prefix, &key))
1347                         /* If the prefix doesn't match, return error so we
1348                          * can pass it down the stack */
1349                         RETURN(-ENOSYS);
1350                 sval = strchr(key, '=');
1351                 if (!sval || (*(sval + 1) == 0)) {
1352                         CERROR("Can't parse param %s (missing '=')\n", key);
1353                         /* rc = -EINVAL;        continue parsing other params */
1354                         continue;
1355                 }
1356                 keylen = sval - key;
1357                 sval++;
1358                 vallen = strlen(sval);
1359                 matched = 0;
1360                 j = 0;
1361                 /* Search proc entries */
1362                 while (lvars[j].name) {
1363                         var = &lvars[j];
1364                         if (class_match_param(key, var->name, NULL) == 0 &&
1365                             keylen == strlen(var->name)) {
1366                                 matched++;
1367                                 rc = -EROFS;
1368
1369                                 if (var->fops && var->fops->write) {
1370                                         mm_segment_t oldfs;
1371                                         oldfs = get_fs();
1372                                         set_fs(KERNEL_DS);
1373                                         rc = (var->fops->write)(&fakefile, sval,
1374                                                                 vallen, NULL);
1375                                         set_fs(oldfs);
1376                                 }
1377                                 break;
1378                         }
1379                         j++;
1380                 }
1381                 if (!matched) {
1382                         CERROR("%.*s: %s unknown param %s\n",
1383                                (int)strlen(prefix) - 1, prefix,
1384                                (char *)lustre_cfg_string(lcfg, 0), key);
1385                         /* rc = -EINVAL;        continue parsing other params */
1386                         skip++;
1387                 } else if (rc < 0) {
1388                         CERROR("%s: error writing proc entry '%s': rc = %d\n",
1389                                prefix, var->name, rc);
1390                         rc = 0;
1391                 } else {
1392                         CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1393                                          lustre_cfg_string(lcfg, 0),
1394                                          (int)strlen(prefix) - 1, prefix,
1395                                          (int)(sval - key - 1), key, sval);
1396                 }
1397         }
1398
1399         if (rc > 0)
1400                 rc = 0;
1401         if (!rc && skip)
1402                 rc = skip;
1403         RETURN(rc);
1404 }
1405 EXPORT_SYMBOL(class_process_proc_param);
1406
1407 /*
1408  * Supplemental functions for config logs, it allocates lustre_cfg
1409  * buffers plus initialized llog record header at the beginning.
1410  */
1411 struct llog_cfg_rec *lustre_cfg_rec_new(int cmd, struct lustre_cfg_bufs *bufs)
1412 {
1413         struct llog_cfg_rec     *lcr;
1414         int                      reclen;
1415
1416         ENTRY;
1417
1418         reclen = lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen);
1419         reclen = llog_data_len(reclen) + sizeof(struct llog_rec_hdr) +
1420                  sizeof(struct llog_rec_tail);
1421
1422         OBD_ALLOC(lcr, reclen);
1423         if (lcr == NULL)
1424                 RETURN(NULL);
1425
1426         lustre_cfg_init(&lcr->lcr_cfg, cmd, bufs);
1427
1428         lcr->lcr_hdr.lrh_len = reclen;
1429         lcr->lcr_hdr.lrh_type = OBD_CFG_REC;
1430
1431         RETURN(lcr);
1432 }
1433 EXPORT_SYMBOL(lustre_cfg_rec_new);
1434
1435 void lustre_cfg_rec_free(struct llog_cfg_rec *lcr)
1436 {
1437         ENTRY;
1438         OBD_FREE(lcr, lcr->lcr_hdr.lrh_len);
1439         EXIT;
1440 }
1441 EXPORT_SYMBOL(lustre_cfg_rec_free);
1442
1443 /** Parse a configuration llog, doing various manipulations on them
1444  * for various reasons, (modifications for compatibility, skip obsolete
1445  * records, change uuids, etc), then class_process_config() resulting
1446  * net records.
1447  */
1448 int class_config_llog_handler(const struct lu_env *env,
1449                               struct llog_handle *handle,
1450                               struct llog_rec_hdr *rec, void *data)
1451 {
1452         struct config_llog_instance *clli = data;
1453         int cfg_len = rec->lrh_len;
1454         char *cfg_buf = (char*) (rec + 1);
1455         int rc = 0;
1456         ENTRY;
1457
1458         //class_config_dump_handler(handle, rec, data);
1459
1460         switch (rec->lrh_type) {
1461         case OBD_CFG_REC: {
1462                 struct lustre_cfg *lcfg, *lcfg_new;
1463                 struct lustre_cfg_bufs bufs;
1464                 char *inst_name = NULL;
1465                 int inst_len = 0;
1466                 int inst = 0, swab = 0;
1467
1468                 lcfg = (struct lustre_cfg *)cfg_buf;
1469                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1470                         lustre_swab_lustre_cfg(lcfg);
1471                         swab = 1;
1472                 }
1473
1474                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1475                 if (rc)
1476                         GOTO(out, rc);
1477
1478                 /* Figure out config state info */
1479                 if (lcfg->lcfg_command == LCFG_MARKER) {
1480                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1481                         lustre_swab_cfg_marker(marker, swab,
1482                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1483                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1484                                clli->cfg_flags, marker->cm_flags);
1485                         if (marker->cm_flags & CM_START) {
1486                                 /* all previous flags off */
1487                                 clli->cfg_flags = CFG_F_MARKER;
1488                                 server_name2index(marker->cm_tgtname,
1489                                                   &clli->cfg_lwp_idx, NULL);
1490                                 if (marker->cm_flags & CM_SKIP) {
1491                                         clli->cfg_flags |= CFG_F_SKIP;
1492                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1493                                                marker->cm_step);
1494                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1495                                            (clli->cfg_sb &&
1496                                             lustre_check_exclusion(clli->cfg_sb,
1497                                                          marker->cm_tgtname))) {
1498                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1499                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1500                                                marker->cm_step);
1501                                 }
1502                         } else if (marker->cm_flags & CM_END) {
1503                                 clli->cfg_flags = 0;
1504                         }
1505                 }
1506                 /* A config command without a start marker before it is
1507                    illegal (post 146) */
1508                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1509                     !(clli->cfg_flags & CFG_F_MARKER) &&
1510                     (lcfg->lcfg_command != LCFG_MARKER)) {
1511                         CWARN("Config not inside markers, ignoring! "
1512                               "(inst: %p, uuid: %s, flags: %#x)\n",
1513                               clli->cfg_instance,
1514                               clli->cfg_uuid.uuid, clli->cfg_flags);
1515                         clli->cfg_flags |= CFG_F_SKIP;
1516                 }
1517                 if (clli->cfg_flags & CFG_F_SKIP) {
1518                         CDEBUG(D_CONFIG, "skipping %#x\n",
1519                                clli->cfg_flags);
1520                         rc = 0;
1521                         /* No processing! */
1522                         break;
1523                 }
1524
1525                 /*
1526                  * For interoperability between 1.8 and 2.0,
1527                  * rename "mds" obd device type to "mdt".
1528                  */
1529                 {
1530                         char *typename = lustre_cfg_string(lcfg, 1);
1531                         char *index = lustre_cfg_string(lcfg, 2);
1532
1533                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1534                              strcmp(typename, "mds") == 0)) {
1535                                 CWARN("For 1.8 interoperability, rename obd "
1536                                        "type from mds to mdt\n");
1537                                 typename[2] = 't';
1538                         }
1539                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1540                              strcmp(index, "type") == 0)) {
1541                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1542                                        "set this index to '0'\n");
1543                                 index[0] = '0';
1544                                 index[1] = 0;
1545                         }
1546                 }
1547
1548 #ifdef HAVE_SERVER_SUPPORT
1549                 /* newer MDS replaces LOV/OSC with LOD/OSP */
1550                 {
1551                         char *typename = lustre_cfg_string(lcfg, 1);
1552
1553                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1554                             strcmp(typename, LUSTRE_LOV_NAME) == 0) &&
1555                             IS_MDT(s2lsi(clli->cfg_sb))) {
1556                                 CDEBUG(D_CONFIG,
1557                                        "For 2.x interoperability, rename obd "
1558                                        "type from lov to lod (%s)\n",
1559                                        s2lsi(clli->cfg_sb)->lsi_svname);
1560                                 strcpy(typename, LUSTRE_LOD_NAME);
1561                         }
1562                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1563                             strcmp(typename, LUSTRE_OSC_NAME) == 0) &&
1564                             IS_MDT(s2lsi(clli->cfg_sb))) {
1565                                 CDEBUG(D_CONFIG,
1566                                        "For 2.x interoperability, rename obd "
1567                                        "type from osc to osp (%s)\n",
1568                                        s2lsi(clli->cfg_sb)->lsi_svname);
1569                                 strcpy(typename, LUSTRE_OSP_NAME);
1570                         }
1571                 }
1572 #endif /* HAVE_SERVER_SUPPORT */
1573
1574                 if (clli->cfg_flags & CFG_F_EXCLUDE) {
1575                         CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
1576                                lcfg->lcfg_command);
1577                         if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
1578                                 /* Add inactive instead */
1579                                 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1580                 }
1581
1582                 lustre_cfg_bufs_init(&bufs, lcfg);
1583
1584                 if (clli && clli->cfg_instance &&
1585                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1586                         inst = 1;
1587                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1588                                    sizeof(clli->cfg_instance) * 2 + 4;
1589                         OBD_ALLOC(inst_name, inst_len);
1590                         if (inst_name == NULL)
1591                                 GOTO(out, rc = -ENOMEM);
1592                         sprintf(inst_name, "%s-%p",
1593                                 lustre_cfg_string(lcfg, 0),
1594                                 clli->cfg_instance);
1595                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1596                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1597                                lcfg->lcfg_command, inst_name);
1598                 }
1599
1600                 /* we override the llog's uuid for clients, to insure they
1601                 are unique */
1602                 if (clli && clli->cfg_instance != NULL &&
1603                     lcfg->lcfg_command == LCFG_ATTACH) {
1604                         lustre_cfg_bufs_set_string(&bufs, 2,
1605                                                    clli->cfg_uuid.uuid);
1606                 }
1607                 /*
1608                  * sptlrpc config record, we expect 2 data segments:
1609                  *  [0]: fs_name/target_name,
1610                  *  [1]: rule string
1611                  * moving them to index [1] and [2], and insert MGC's
1612                  * obdname at index [0].
1613                  */
1614                 if (clli && clli->cfg_instance == NULL &&
1615                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1616                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1617                                             bufs.lcfg_buflen[1]);
1618                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1619                                             bufs.lcfg_buflen[0]);
1620                         lustre_cfg_bufs_set_string(&bufs, 0,
1621                                                    clli->cfg_obdname);
1622                 }
1623
1624                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1625                 if (lcfg_new == NULL)
1626                         GOTO(out, rc = -ENOMEM);
1627
1628                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1629                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1630
1631                 /* XXX Hack to try to remain binary compatible with
1632                  * pre-newconfig logs */
1633                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1634                     (lcfg->lcfg_nid >> 32) == 0) {
1635                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1636
1637                         lcfg_new->lcfg_nid =
1638                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1639                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1640                               lcfg->lcfg_nal, addr,
1641                               libcfs_nid2str(lcfg_new->lcfg_nid));
1642                 } else {
1643                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1644                 }
1645
1646                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1647
1648                 rc = class_process_config(lcfg_new);
1649                 lustre_cfg_free(lcfg_new);
1650
1651                 if (inst)
1652                         OBD_FREE(inst_name, inst_len);
1653                 break;
1654         }
1655         default:
1656                 CERROR("Unknown llog record type %#x encountered\n",
1657                        rec->lrh_type);
1658                 break;
1659         }
1660 out:
1661         if (rc) {
1662                 CERROR("%s: cfg command failed: rc = %d\n",
1663                        handle->lgh_ctxt->loc_obd->obd_name, rc);
1664                 class_config_dump_handler(NULL, handle, rec, data);
1665         }
1666         RETURN(rc);
1667 }
1668 EXPORT_SYMBOL(class_config_llog_handler);
1669
1670 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1671                             char *name, struct config_llog_instance *cfg)
1672 {
1673         struct llog_process_cat_data     cd = {0, 0};
1674         struct llog_handle              *llh;
1675         llog_cb_t                        callback;
1676         int                              rc;
1677         ENTRY;
1678
1679         CDEBUG(D_INFO, "looking up llog %s\n", name);
1680         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1681         if (rc)
1682                 RETURN(rc);
1683
1684         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1685         if (rc)
1686                 GOTO(parse_out, rc);
1687
1688         /* continue processing from where we last stopped to end-of-log */
1689         if (cfg) {
1690                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1691                 callback = cfg->cfg_callback;
1692                 LASSERT(callback != NULL);
1693         } else {
1694                 callback = class_config_llog_handler;
1695         }
1696
1697         cd.lpcd_last_idx = 0;
1698
1699         rc = llog_process(env, llh, callback, cfg, &cd);
1700
1701         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1702                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1703         if (cfg)
1704                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1705
1706 parse_out:
1707         llog_close(env, llh);
1708         RETURN(rc);
1709 }
1710 EXPORT_SYMBOL(class_config_parse_llog);
1711
1712 static struct lcfg_type_data {
1713         __u32    ltd_type;
1714         char    *ltd_name;
1715         char    *ltd_bufs[4];
1716 } lcfg_data_table[] = {
1717         { LCFG_ATTACH, "attach", { "type", "UUID", "3", "4" } },
1718         { LCFG_DETACH, "detach", { "1", "2", "3", "4" } },
1719         { LCFG_SETUP, "setup", { "UUID", "node", "options", "failout" } },
1720         { LCFG_CLEANUP, "cleanup", { "1", "2", "3", "4" } },
1721         { LCFG_ADD_UUID, "add_uuid", { "node", "2", "3", "4" }  },
1722         { LCFG_DEL_UUID, "del_uuid", { "1", "2", "3", "4" }  },
1723         { LCFG_MOUNTOPT, "new_profile", { "name", "lov", "lmv", "4" }  },
1724         { LCFG_DEL_MOUNTOPT, "del_mountopt", { "1", "2", "3", "4" } , },
1725         { LCFG_SET_TIMEOUT, "set_timeout", { "parameter", "2", "3", "4" }  },
1726         { LCFG_SET_UPCALL, "set_upcall", { "1", "2", "3", "4" }  },
1727         { LCFG_ADD_CONN, "add_conn", { "node", "2", "3", "4" }  },
1728         { LCFG_DEL_CONN, "del_conn", { "1", "2", "3", "4" }  },
1729         { LCFG_LOV_ADD_OBD, "add_osc", { "ost", "index", "gen", "UUID" } },
1730         { LCFG_LOV_DEL_OBD, "del_osc", { "1", "2", "3", "4" } },
1731         { LCFG_PARAM, "set_param", { "parameter", "value", "3", "4" } },
1732         { LCFG_MARKER, "marker", { "1", "2", "3", "4" } },
1733         { LCFG_LOG_START, "log_start", { "1", "2", "3", "4" } },
1734         { LCFG_LOG_END, "log_end", { "1", "2", "3", "4" } },
1735         { LCFG_LOV_ADD_INA, "add_osc_inactive", { "1", "2", "3", "4" }  },
1736         { LCFG_ADD_MDC, "add_mdc", { "mdt", "index", "gen", "UUID" } },
1737         { LCFG_DEL_MDC, "del_mdc", { "1", "2", "3", "4" } },
1738         { LCFG_SPTLRPC_CONF, "security", { "parameter", "2", "3", "4" } },
1739         { LCFG_POOL_NEW, "new_pool", { "fsname", "pool", "3", "4" }  },
1740         { LCFG_POOL_ADD, "add_pool", { "fsname", "pool", "ost", "4" } },
1741         { LCFG_POOL_REM, "remove_pool", { "fsname", "pool", "ost", "4" } },
1742         { LCFG_POOL_DEL, "del_pool", { "fsname", "pool", "3", "4" } },
1743         { LCFG_SET_LDLM_TIMEOUT, "set_ldlm_timeout",
1744           { "parameter", "2", "3", "4" } },
1745         { 0, NULL, { NULL, NULL, NULL, NULL } }
1746 };
1747
1748 static struct lcfg_type_data *lcfg_cmd2data(__u32 cmd)
1749 {
1750         int i = 0;
1751
1752         while (lcfg_data_table[i].ltd_type != 0) {
1753                 if (lcfg_data_table[i].ltd_type == cmd)
1754                         return &lcfg_data_table[i];
1755                 i++;
1756         }
1757         return NULL;
1758 }
1759
1760 /**
1761  * parse config record and output dump in supplied buffer.
1762  * This is separated from class_config_dump_handler() to use
1763  * for ioctl needs as well
1764  *
1765  * Sample Output:
1766  * - { event: attach, device: lustrewt-clilov, type: lov, UUID:
1767  *     lustrewt-clilov_UUID }
1768  */
1769 int class_config_yaml_output(struct llog_rec_hdr *rec, char *buf, int size)
1770 {
1771         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1772         char                    *ptr = buf;
1773         char                    *end = buf + size;
1774         int                      rc = 0, i;
1775         struct lcfg_type_data   *ldata;
1776
1777         LASSERT(rec->lrh_type == OBD_CFG_REC);
1778         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1779         if (rc < 0)
1780                 return rc;
1781
1782         ldata = lcfg_cmd2data(lcfg->lcfg_command);
1783         if (ldata == NULL)
1784                 return -ENOTTY;
1785
1786         if (lcfg->lcfg_command == LCFG_MARKER)
1787                 return 0;
1788
1789         /* form YAML entity */
1790         ptr += snprintf(ptr, end - ptr, "- { event: %s", ldata->ltd_name);
1791
1792         if (lcfg->lcfg_flags)
1793                 ptr += snprintf(ptr, end - ptr, ", flags: %#08x",
1794                                 lcfg->lcfg_flags);
1795         if (lcfg->lcfg_num)
1796                 ptr += snprintf(ptr, end - ptr, ", num: %#08x",
1797                                 lcfg->lcfg_num);
1798         if (lcfg->lcfg_nid) {
1799                 char nidstr[LNET_NIDSTR_SIZE];
1800
1801                 libcfs_nid2str_r(lcfg->lcfg_nid, nidstr, sizeof(nidstr));
1802                 ptr += snprintf(ptr, end - ptr, ", nid: %s("LPX64")",
1803                                 nidstr, lcfg->lcfg_nid);
1804         }
1805
1806         if (LUSTRE_CFG_BUFLEN(lcfg, 0) > 0)
1807                 ptr += snprintf(ptr, end - ptr, ", device: %s",
1808                                 lustre_cfg_string(lcfg, 0));
1809
1810         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1811                 if (LUSTRE_CFG_BUFLEN(lcfg, i) > 0)
1812                         ptr += snprintf(ptr, end - ptr, ", %s: %s",
1813                                         ldata->ltd_bufs[i - 1],
1814                                         lustre_cfg_string(lcfg, i));
1815         }
1816
1817         ptr += snprintf(ptr, end - ptr, " }\n");
1818         /* return consumed bytes */
1819         rc = ptr - buf;
1820         return rc;
1821 }
1822
1823 /**
1824  * parse config record and output dump in supplied buffer.
1825  * This is separated from class_config_dump_handler() to use
1826  * for ioctl needs as well
1827  */
1828 static int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
1829 {
1830         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1831         char                    *ptr = buf;
1832         char                    *end = buf + size;
1833         int                      rc = 0;
1834
1835         ENTRY;
1836
1837         LASSERT(rec->lrh_type == OBD_CFG_REC);
1838         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1839         if (rc < 0)
1840                 RETURN(rc);
1841
1842         ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
1843         if (lcfg->lcfg_flags)
1844                 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1845                                 lcfg->lcfg_flags);
1846
1847         if (lcfg->lcfg_num)
1848                 ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
1849
1850         if (lcfg->lcfg_nid) {
1851                 char nidstr[LNET_NIDSTR_SIZE];
1852
1853                 libcfs_nid2str_r(lcfg->lcfg_nid, nidstr, sizeof(nidstr));
1854                 ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1855                                 nidstr, lcfg->lcfg_nid);
1856         }
1857
1858         if (lcfg->lcfg_command == LCFG_MARKER) {
1859                 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1860
1861                 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1862                                 marker->cm_step, marker->cm_flags,
1863                                 marker->cm_tgtname, marker->cm_comment);
1864         } else {
1865                 int i;
1866
1867                 for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1868                         ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1869                                         lustre_cfg_string(lcfg, i));
1870                 }
1871         }
1872         ptr += snprintf(ptr, end - ptr, "\n");
1873         /* return consumed bytes */
1874         rc = ptr - buf;
1875         RETURN(rc);
1876 }
1877
1878 int class_config_dump_handler(const struct lu_env *env,
1879                               struct llog_handle *handle,
1880                               struct llog_rec_hdr *rec, void *data)
1881 {
1882         char    *outstr;
1883         int      rc = 0;
1884
1885         ENTRY;
1886
1887         OBD_ALLOC(outstr, 256);
1888         if (outstr == NULL)
1889                 RETURN(-ENOMEM);
1890
1891         if (rec->lrh_type == OBD_CFG_REC) {
1892                 class_config_parse_rec(rec, outstr, 256);
1893                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1894         } else {
1895                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1896                 rc = -EINVAL;
1897         }
1898
1899         OBD_FREE(outstr, 256);
1900         RETURN(rc);
1901 }
1902
1903 /** Call class_cleanup and class_detach.
1904  * "Manual" only in the sense that we're faking lcfg commands.
1905  */
1906 int class_manual_cleanup(struct obd_device *obd)
1907 {
1908         char                    flags[3] = "";
1909         struct lustre_cfg      *lcfg;
1910         struct lustre_cfg_bufs  bufs;
1911         int                     rc;
1912         ENTRY;
1913
1914         if (!obd) {
1915                 CERROR("empty cleanup\n");
1916                 RETURN(-EALREADY);
1917         }
1918
1919         if (obd->obd_force)
1920                 strcat(flags, "F");
1921         if (obd->obd_fail)
1922                 strcat(flags, "A");
1923
1924         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1925                obd->obd_name, flags);
1926
1927         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1928         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1929         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1930         if (lcfg == NULL)
1931                 RETURN(-ENOMEM);
1932
1933         rc = class_process_config(lcfg);
1934         if (rc) {
1935                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1936                 GOTO(out, rc);
1937         }
1938
1939         /* the lcfg is almost the same for both ops */
1940         lcfg->lcfg_command = LCFG_DETACH;
1941         rc = class_process_config(lcfg);
1942         if (rc)
1943                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1944 out:
1945         lustre_cfg_free(lcfg);
1946         RETURN(rc);
1947 }
1948 EXPORT_SYMBOL(class_manual_cleanup);
1949
1950 /*
1951  * uuid<->export lustre hash operations
1952  */
1953
1954 static unsigned
1955 uuid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
1956 {
1957         return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
1958                                   sizeof(((struct obd_uuid *)key)->uuid), mask);
1959 }
1960
1961 static void *
1962 uuid_key(struct hlist_node *hnode)
1963 {
1964         struct obd_export *exp;
1965
1966         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1967
1968         return &exp->exp_client_uuid;
1969 }
1970
1971 /*
1972  * NOTE: It is impossible to find an export that is in failed
1973  *       state with this function
1974  */
1975 static int
1976 uuid_keycmp(const void *key, struct hlist_node *hnode)
1977 {
1978         struct obd_export *exp;
1979
1980         LASSERT(key);
1981         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1982
1983         return obd_uuid_equals(key, &exp->exp_client_uuid) &&
1984                !exp->exp_failed;
1985 }
1986
1987 static void *
1988 uuid_export_object(struct hlist_node *hnode)
1989 {
1990         return hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1991 }
1992
1993 static void
1994 uuid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
1995 {
1996         struct obd_export *exp;
1997
1998         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1999         class_export_get(exp);
2000 }
2001
2002 static void
2003 uuid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2004 {
2005         struct obd_export *exp;
2006
2007         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2008         class_export_put(exp);
2009 }
2010
2011 static struct cfs_hash_ops uuid_hash_ops = {
2012         .hs_hash        = uuid_hash,
2013         .hs_key         = uuid_key,
2014         .hs_keycmp      = uuid_keycmp,
2015         .hs_object      = uuid_export_object,
2016         .hs_get         = uuid_export_get,
2017         .hs_put_locked  = uuid_export_put_locked,
2018 };
2019
2020
2021 /*
2022  * nid<->export hash operations
2023  */
2024
2025 static unsigned
2026 nid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
2027 {
2028         return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
2029 }
2030
2031 static void *
2032 nid_key(struct hlist_node *hnode)
2033 {
2034         struct obd_export *exp;
2035
2036         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2037
2038         RETURN(&exp->exp_connection->c_peer.nid);
2039 }
2040
2041 /*
2042  * NOTE: It is impossible to find an export that is in failed
2043  *       state with this function
2044  */
2045 static int
2046 nid_kepcmp(const void *key, struct hlist_node *hnode)
2047 {
2048         struct obd_export *exp;
2049
2050         LASSERT(key);
2051         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2052
2053         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
2054                !exp->exp_failed);
2055 }
2056
2057 static void *
2058 nid_export_object(struct hlist_node *hnode)
2059 {
2060         return hlist_entry(hnode, struct obd_export, exp_nid_hash);
2061 }
2062
2063 static void
2064 nid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
2065 {
2066         struct obd_export *exp;
2067
2068         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2069         class_export_get(exp);
2070 }
2071
2072 static void
2073 nid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2074 {
2075         struct obd_export *exp;
2076
2077         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2078         class_export_put(exp);
2079 }
2080
2081 static struct cfs_hash_ops nid_hash_ops = {
2082         .hs_hash        = nid_hash,
2083         .hs_key         = nid_key,
2084         .hs_keycmp      = nid_kepcmp,
2085         .hs_object      = nid_export_object,
2086         .hs_get         = nid_export_get,
2087         .hs_put_locked  = nid_export_put_locked,
2088 };
2089
2090
2091 /*
2092  * nid<->nidstats hash operations
2093  */
2094
2095 static void *
2096 nidstats_key(struct hlist_node *hnode)
2097 {
2098         struct nid_stat *ns;
2099
2100         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2101
2102         return &ns->nid;
2103 }
2104
2105 static int
2106 nidstats_keycmp(const void *key, struct hlist_node *hnode)
2107 {
2108         return *(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key;
2109 }
2110
2111 static void *
2112 nidstats_object(struct hlist_node *hnode)
2113 {
2114         return hlist_entry(hnode, struct nid_stat, nid_hash);
2115 }
2116
2117 static void
2118 nidstats_get(struct cfs_hash *hs, struct hlist_node *hnode)
2119 {
2120         struct nid_stat *ns;
2121
2122         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2123         nidstat_getref(ns);
2124 }
2125
2126 static void
2127 nidstats_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2128 {
2129         struct nid_stat *ns;
2130
2131         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2132         nidstat_putref(ns);
2133 }
2134
2135 static struct cfs_hash_ops nid_stat_hash_ops = {
2136         .hs_hash        = nid_hash,
2137         .hs_key         = nidstats_key,
2138         .hs_keycmp      = nidstats_keycmp,
2139         .hs_object      = nidstats_object,
2140         .hs_get         = nidstats_get,
2141         .hs_put_locked  = nidstats_put_locked,
2142 };
2143
2144
2145 /*
2146  * client_generation<->export hash operations
2147  */
2148
2149 static unsigned
2150 gen_hash(struct cfs_hash *hs, const void *key, unsigned mask)
2151 {
2152         return cfs_hash_djb2_hash(key, sizeof(__u32), mask);
2153 }
2154
2155 static void *
2156 gen_key(struct hlist_node *hnode)
2157 {
2158         struct obd_export *exp;
2159
2160         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2161
2162         RETURN(&exp->exp_target_data.ted_lcd->lcd_generation);
2163 }
2164
2165 /*
2166  * NOTE: It is impossible to find an export that is in failed
2167  *       state with this function
2168  */
2169 static int
2170 gen_kepcmp(const void *key, struct hlist_node *hnode)
2171 {
2172         struct obd_export *exp;
2173
2174         LASSERT(key);
2175         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2176
2177         RETURN(exp->exp_target_data.ted_lcd->lcd_generation == *(__u32 *)key &&
2178                !exp->exp_failed);
2179 }
2180
2181 static void *
2182 gen_export_object(struct hlist_node *hnode)
2183 {
2184         return hlist_entry(hnode, struct obd_export, exp_gen_hash);
2185 }
2186
2187 static void
2188 gen_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
2189 {
2190         struct obd_export *exp;
2191
2192         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2193         class_export_get(exp);
2194 }
2195
2196 static void
2197 gen_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2198 {
2199         struct obd_export *exp;
2200
2201         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2202         class_export_put(exp);
2203 }
2204
2205 static struct cfs_hash_ops gen_hash_ops = {
2206         .hs_hash        = gen_hash,
2207         .hs_key         = gen_key,
2208         .hs_keycmp      = gen_kepcmp,
2209         .hs_object      = gen_export_object,
2210         .hs_get         = gen_export_get,
2211         .hs_put_locked  = gen_export_put_locked,
2212 };