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, 2015, 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
  43 #include <linux/string.h>
  44
  45 #include <llog_swab.h>
  46 #include <lprocfs_status.h>
  47 #include <lustre_disk.h>
  48 #include <lustre_ioctl.h>
  49 #include <lustre_log.h>
  50 #include <lustre_param.h>
  51 #include <obd_class.h>
  52
  53 #include "llog_internal.h"
  54
  55 static struct cfs_hash_ops uuid_hash_ops;
  56 static struct cfs_hash_ops nid_hash_ops;
  57 static struct cfs_hash_ops nid_stat_hash_ops;
  58 static struct cfs_hash_ops gen_hash_ops;
  59
  60 /*********** string parsing utils *********/
  61
  62 /* returns 0 if we find this key in the buffer, else 1 */
  63 int class_find_param(char *buf, char *key, char **valp)
  64 {
  65         char *ptr;
  66
  67         if (!buf)
  68                 return 1;
  69
  70         if ((ptr = strstr(buf, key)) == NULL)
  71                 return 1;
  72
  73         if (valp)
  74                 *valp = ptr + strlen(key);
  75
  76         return 0;
  77 }
  78 EXPORT_SYMBOL(class_find_param);
  79
  80 /**
  81  * Check whether the proc parameter \a param is an old parameter or not from
  82  * the array \a ptr which contains the mapping from old parameters to new ones.
  83  * If it's an old one, then return the pointer to the cfg_interop_param struc-
  84  * ture which contains both the old and new parameters.
  85  *
  86  * \param param                 proc parameter
  87  * \param ptr                   an array which contains the mapping from
  88  *                              old parameters to new ones
  89  *
  90  * \retval valid-pointer        pointer to the cfg_interop_param structure
  91  *                              which contains the old and new parameters
  92  * \retval NULL                 \a param or \a ptr is NULL,
  93  *                              or \a param is not an old parameter
  94  */
  95 struct cfg_interop_param *class_find_old_param(const char *param,
  96                                                struct cfg_interop_param *ptr)
  97 {
  98         char *value = NULL;
  99         int   name_len = 0;
 100
 101         if (param == NULL || ptr == NULL)
 102                 RETURN(NULL);
 103
 104         value = strchr(param, '=');
 105         if (value == NULL)
 106                 name_len = strlen(param);
 107         else
 108                 name_len = value - param;
 109
 110         while (ptr->old_param != NULL) {
 111                 if (strncmp(param, ptr->old_param, name_len) == 0 &&
 112                     name_len == strlen(ptr->old_param))
 113                         RETURN(ptr);
 114                 ptr++;
 115         }
 116
 117         RETURN(NULL);
 118 }
 119 EXPORT_SYMBOL(class_find_old_param);
 120
 121 /**
 122  * Finds a parameter in \a params and copies it to \a copy.
 123  *
 124  * Leading spaces are skipped. Next space or end of string is the
 125  * parameter terminator with the exception that spaces inside single or double
 126  * quotes get included into a parameter. The parameter is copied into \a copy
 127  * which has to be allocated big enough by a caller, quotes are stripped in
 128  * the copy and the copy is terminated by 0.
 129  *
 130  * On return \a params is set to next parameter or to NULL if last
 131  * parameter is returned.
 132  *
 133  * \retval 0 if parameter is returned in \a copy
 134  * \retval 1 otherwise
 135  * \retval -EINVAL if unbalanced quota is found
 136  */
 137 int class_get_next_param(char **params, char *copy)
 138 {
 139         char *q1, *q2, *str;
 140         int len;
 141
 142         str = *params;
 143         while (*str == ' ')
 144                 str++;
 145
 146         if (*str == '\0') {
 147                 *params = NULL;
 148                 return 1;
 149         }
 150
 151         while (1) {
 152                 q1 = strpbrk(str, " '\"");
 153                 if (q1 == NULL) {
 154                         len = strlen(str);
 155                         memcpy(copy, str, len);
 156                         copy[len] = '\0';
 157                         *params = NULL;
 158                         return 0;
 159                 }
 160                 len = q1 - str;
 161                 if (*q1 == ' ') {
 162                         memcpy(copy, str, len);
 163                         copy[len] = '\0';
 164                         *params = str + len;
 165                         return 0;
 166                 }
 167
 168                 memcpy(copy, str, len);
 169                 copy += len;
 170
 171                 /* search for the matching closing quote */
 172                 str = q1 + 1;
 173                 q2 = strchr(str, *q1);
 174                 if (q2 == NULL) {
 175                         CERROR("Unbalanced quota in parameters: \"%s\"\n",
 176                                *params);
 177                         return -EINVAL;
 178                 }
 179                 len = q2 - str;
 180                 memcpy(copy, str, len);
 181                 copy += len;
 182                 str = q2 + 1;
 183         }
 184         return 1;
 185 }
 186 EXPORT_SYMBOL(class_get_next_param);
 187
 188 /* returns 0 if this is the first key in the buffer, else 1.
 189    valp points to first char after key. */
 190 int class_match_param(char *buf, const char *key, char **valp)
 191 {
 192         if (!buf)
 193                 return 1;
 194
 195         if (memcmp(buf, key, strlen(key)) != 0)
 196                 return 1;
 197
 198         if (valp)
 199                 *valp = buf + strlen(key);
 200
 201         return 0;
 202 }
 203 EXPORT_SYMBOL(class_match_param);
 204
 205 static int parse_nid(char *buf, void *value, int quiet)
 206 {
 207         lnet_nid_t *nid = (lnet_nid_t *)value;
 208
 209         *nid = libcfs_str2nid(buf);
 210         if (*nid != LNET_NID_ANY)
 211                 return 0;
 212
 213         if (!quiet)
 214                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
 215         return -EINVAL;
 216 }
 217
 218 static int parse_net(char *buf, void *value)
 219 {
 220         __u32 *net = (__u32 *)value;
 221
 222         *net = libcfs_str2net(buf);
 223         CDEBUG(D_INFO, "Net %s\n", libcfs_net2str(*net));
 224         return 0;
 225 }
 226
 227 enum {
 228         CLASS_PARSE_NID = 1,
 229         CLASS_PARSE_NET,
 230 };
 231
 232 /* 0 is good nid,
 233    1 not found
 234    < 0 error
 235    endh is set to next separator */
 236 static int class_parse_value(char *buf, int opc, void *value, char **endh,
 237                              int quiet)
 238 {
 239         char *endp;
 240         char  tmp;
 241         int   rc = 0;
 242
 243         if (!buf)
 244                 return 1;
 245         while (*buf == ',' || *buf == ':')
 246                 buf++;
 247         if (*buf == ' ' || *buf == '/' || *buf == '\0')
 248                 return 1;
 249
 250         /* nid separators or end of nids */
 251         endp = strpbrk(buf, ",: /");
 252         if (endp == NULL)
 253                 endp = buf + strlen(buf);
 254
 255         tmp = *endp;
 256         *endp = '\0';
 257         switch (opc) {
 258         default:
 259                 LBUG();
 260         case CLASS_PARSE_NID:
 261                 rc = parse_nid(buf, value, quiet);
 262                 break;
 263         case CLASS_PARSE_NET:
 264                 rc = parse_net(buf, value);
 265                 break;
 266         }
 267         *endp = tmp;
 268         if (rc != 0)
 269                 return rc;
 270         if (endh)
 271                 *endh = endp;
 272         return 0;
 273 }
 274
 275 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
 276 {
 277         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 0);
 278 }
 279 EXPORT_SYMBOL(class_parse_nid);
 280
 281 int class_parse_nid_quiet(char *buf, lnet_nid_t *nid, char **endh)
 282 {
 283         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 1);
 284 }
 285 EXPORT_SYMBOL(class_parse_nid_quiet);
 286
 287 int class_parse_net(char *buf, __u32 *net, char **endh)
 288 {
 289         return class_parse_value(buf, CLASS_PARSE_NET, (void *)net, endh, 0);
 290 }
 291
 292 /* 1 param contains key and match
 293  * 0 param contains key and not match
 294  * -1 param does not contain key
 295  */
 296 int class_match_nid(char *buf, char *key, lnet_nid_t nid)
 297 {
 298         lnet_nid_t tmp;
 299         int   rc = -1;
 300
 301         while (class_find_param(buf, key, &buf) == 0) {
 302                 /* please restrict to the nids pertaining to
 303                  * the specified nids */
 304                 while (class_parse_nid(buf, &tmp, &buf) == 0) {
 305                         if (tmp == nid)
 306                                 return 1;
 307                 }
 308                 rc = 0;
 309         }
 310         return rc;
 311 }
 312
 313 int class_match_net(char *buf, char *key, __u32 net)
 314 {
 315         __u32 tmp;
 316         int   rc = -1;
 317
 318         while (class_find_param(buf, key, &buf) == 0) {
 319                 /* please restrict to the nids pertaining to
 320                  * the specified networks */
 321                 while (class_parse_net(buf, &tmp, &buf) == 0) {
 322                         if (tmp == net)
 323                                 return 1;
 324                 }
 325                 rc = 0;
 326         }
 327         return rc;
 328 }
 329
 330 /********************** class fns **********************/
 331
 332 /**
 333  * Create a new obd device and set the type, name and uuid.  If successful,
 334  * the new device can be accessed by either name or uuid.
 335  */
 336 int class_attach(struct lustre_cfg *lcfg)
 337 {
 338         struct obd_device *obd = NULL;
 339         char *typename, *name, *uuid;
 340         int rc, len;
 341         ENTRY;
 342
 343         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 344                 CERROR("No type passed!\n");
 345                 RETURN(-EINVAL);
 346         }
 347         typename = lustre_cfg_string(lcfg, 1);
 348
 349         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
 350                 CERROR("No name passed!\n");
 351                 RETURN(-EINVAL);
 352         }
 353         name = lustre_cfg_string(lcfg, 0);
 354
 355         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
 356                 CERROR("No UUID passed!\n");
 357                 RETURN(-EINVAL);
 358         }
 359         uuid = lustre_cfg_string(lcfg, 2);
 360
 361         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 362                MKSTR(typename), MKSTR(name), MKSTR(uuid));
 363
 364         obd = class_newdev(typename, name);
 365         if (IS_ERR(obd)) {
 366                 /* Already exists or out of obds */
 367                 rc = PTR_ERR(obd);
 368                 obd = NULL;
 369                 CERROR("Cannot create device %s of type %s : %d\n",
 370                        name, typename, rc);
 371                 GOTO(out, rc);
 372         }
 373         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
 374                  name, typename);
 375         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 376                  "obd %p obd_magic %08X != %08X\n",
 377                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 378         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
 379                  "%p obd_name %s != %s\n", obd, obd->obd_name, name);
 380
 381         rwlock_init(&obd->obd_pool_lock);
 382         obd->obd_pool_limit = 0;
 383         obd->obd_pool_slv = 0;
 384
 385         INIT_LIST_HEAD(&obd->obd_exports);
 386         INIT_LIST_HEAD(&obd->obd_unlinked_exports);
 387         INIT_LIST_HEAD(&obd->obd_delayed_exports);
 388         INIT_LIST_HEAD(&obd->obd_exports_timed);
 389         INIT_LIST_HEAD(&obd->obd_nid_stats);
 390         spin_lock_init(&obd->obd_nid_lock);
 391         spin_lock_init(&obd->obd_dev_lock);
 392         mutex_init(&obd->obd_dev_mutex);
 393         spin_lock_init(&obd->obd_osfs_lock);
 394         /* obd->obd_osfs_age must be set to a value in the distant
 395          * past to guarantee a fresh statfs is fetched on mount. */
 396         obd->obd_osfs_age = cfs_time_shift_64(-1000);
 397
 398         /* XXX belongs in setup not attach  */
 399         init_rwsem(&obd->obd_observer_link_sem);
 400         /* recovery data */
 401         cfs_init_timer(&obd->obd_recovery_timer);
 402         spin_lock_init(&obd->obd_recovery_task_lock);
 403         init_waitqueue_head(&obd->obd_next_transno_waitq);
 404         init_waitqueue_head(&obd->obd_evict_inprogress_waitq);
 405         INIT_LIST_HEAD(&obd->obd_req_replay_queue);
 406         INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
 407         INIT_LIST_HEAD(&obd->obd_final_req_queue);
 408         INIT_LIST_HEAD(&obd->obd_evict_list);
 409         INIT_LIST_HEAD(&obd->obd_lwp_list);
 410
 411         llog_group_init(&obd->obd_olg);
 412
 413         obd->obd_conn_inprogress = 0;
 414
 415         len = strlen(uuid);
 416         if (len >= sizeof(obd->obd_uuid)) {
 417                 CERROR("uuid must be < %d bytes long\n",
 418                        (int)sizeof(obd->obd_uuid));
 419                 GOTO(out, rc = -EINVAL);
 420         }
 421         memcpy(obd->obd_uuid.uuid, uuid, len);
 422
 423         /* Detach drops this */
 424         spin_lock(&obd->obd_dev_lock);
 425         atomic_set(&obd->obd_refcount, 1);
 426         spin_unlock(&obd->obd_dev_lock);
 427         lu_ref_init(&obd->obd_reference);
 428         lu_ref_add(&obd->obd_reference, "attach", obd);
 429
 430         obd->obd_attached = 1;
 431         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 432                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 433         RETURN(0);
 434  out:
 435         if (obd != NULL) {
 436                 class_release_dev(obd);
 437         }
 438         return rc;
 439 }
 440 EXPORT_SYMBOL(class_attach);
 441
 442 /** Create hashes, self-export, and call type-specific setup.
 443  * Setup is effectively the "start this obd" call.
 444  */
 445 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 446 {
 447         int err = 0;
 448         struct obd_export *exp;
 449         ENTRY;
 450
 451         LASSERT(obd != NULL);
 452         LASSERTF(obd == class_num2obd(obd->obd_minor),
 453                  "obd %p != obd_devs[%d] %p\n",
 454                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 455         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 456                  "obd %p obd_magic %08x != %08x\n",
 457                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 458
 459         /* have we attached a type to this device? */
 460         if (!obd->obd_attached) {
 461                 CERROR("Device %d not attached\n", obd->obd_minor);
 462                 RETURN(-ENODEV);
 463         }
 464
 465         if (obd->obd_set_up) {
 466                 CERROR("Device %d already setup (type %s)\n",
 467                        obd->obd_minor, obd->obd_type->typ_name);
 468                 RETURN(-EEXIST);
 469         }
 470
 471         /* is someone else setting us up right now? (attach inits spinlock) */
 472         spin_lock(&obd->obd_dev_lock);
 473         if (obd->obd_starting) {
 474                 spin_unlock(&obd->obd_dev_lock);
 475                 CERROR("Device %d setup in progress (type %s)\n",
 476                        obd->obd_minor, obd->obd_type->typ_name);
 477                 RETURN(-EEXIST);
 478         }
 479         /* just leave this on forever.  I can't use obd_set_up here because
 480            other fns check that status, and we're not actually set up yet. */
 481         obd->obd_starting = 1;
 482         obd->obd_uuid_hash = NULL;
 483         obd->obd_nid_hash = NULL;
 484         obd->obd_nid_stats_hash = NULL;
 485         obd->obd_gen_hash = NULL;
 486         spin_unlock(&obd->obd_dev_lock);
 487
 488         /* create an uuid-export lustre hash */
 489         obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
 490                                              HASH_UUID_CUR_BITS,
 491                                              HASH_UUID_MAX_BITS,
 492                                              HASH_UUID_BKT_BITS, 0,
 493                                              CFS_HASH_MIN_THETA,
 494                                              CFS_HASH_MAX_THETA,
 495                                              &uuid_hash_ops, CFS_HASH_DEFAULT);
 496         if (!obd->obd_uuid_hash)
 497                 GOTO(err_hash, err = -ENOMEM);
 498
 499         /* create a nid-export lustre hash */
 500         obd->obd_nid_hash = cfs_hash_create("NID_HASH",
 501                                             HASH_NID_CUR_BITS,
 502                                             HASH_NID_MAX_BITS,
 503                                             HASH_NID_BKT_BITS, 0,
 504                                             CFS_HASH_MIN_THETA,
 505                                             CFS_HASH_MAX_THETA,
 506                                             &nid_hash_ops, CFS_HASH_DEFAULT);
 507         if (!obd->obd_nid_hash)
 508                 GOTO(err_hash, err = -ENOMEM);
 509
 510         /* create a nid-stats lustre hash */
 511         obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
 512                                                   HASH_NID_STATS_CUR_BITS,
 513                                                   HASH_NID_STATS_MAX_BITS,
 514                                                   HASH_NID_STATS_BKT_BITS, 0,
 515                                                   CFS_HASH_MIN_THETA,
 516                                                   CFS_HASH_MAX_THETA,
 517                                                   &nid_stat_hash_ops, CFS_HASH_DEFAULT);
 518         if (!obd->obd_nid_stats_hash)
 519                 GOTO(err_hash, err = -ENOMEM);
 520
 521         /* create a client_generation-export lustre hash */
 522         obd->obd_gen_hash = cfs_hash_create("UUID_HASH",
 523                                             HASH_GEN_CUR_BITS,
 524                                             HASH_GEN_MAX_BITS,
 525                                             HASH_GEN_BKT_BITS, 0,
 526                                             CFS_HASH_MIN_THETA,
 527                                             CFS_HASH_MAX_THETA,
 528                                             &gen_hash_ops, CFS_HASH_DEFAULT);
 529         if (!obd->obd_gen_hash)
 530                 GOTO(err_hash, err = -ENOMEM);
 531
 532         exp = class_new_export(obd, &obd->obd_uuid);
 533         if (IS_ERR(exp))
 534                 GOTO(err_hash, err = PTR_ERR(exp));
 535
 536         obd->obd_self_export = exp;
 537         list_del_init(&exp->exp_obd_chain_timed);
 538         class_export_put(exp);
 539
 540         err = obd_setup(obd, lcfg);
 541         if (err)
 542                 GOTO(err_exp, err);
 543
 544         obd->obd_set_up = 1;
 545
 546         spin_lock(&obd->obd_dev_lock);
 547         /* cleanup drops this */
 548         class_incref(obd, "setup", obd);
 549         spin_unlock(&obd->obd_dev_lock);
 550
 551         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 552                obd->obd_name, obd->obd_uuid.uuid);
 553
 554         RETURN(0);
 555 err_exp:
 556         if (obd->obd_self_export) {
 557                 class_unlink_export(obd->obd_self_export);
 558                 obd->obd_self_export = NULL;
 559         }
 560 err_hash:
 561         if (obd->obd_uuid_hash) {
 562                 cfs_hash_putref(obd->obd_uuid_hash);
 563                 obd->obd_uuid_hash = NULL;
 564         }
 565         if (obd->obd_nid_hash) {
 566                 cfs_hash_putref(obd->obd_nid_hash);
 567                 obd->obd_nid_hash = NULL;
 568         }
 569         if (obd->obd_nid_stats_hash) {
 570                 cfs_hash_putref(obd->obd_nid_stats_hash);
 571                 obd->obd_nid_stats_hash = NULL;
 572         }
 573         if (obd->obd_gen_hash) {
 574                 cfs_hash_putref(obd->obd_gen_hash);
 575                 obd->obd_gen_hash = NULL;
 576         }
 577         obd->obd_starting = 0;
 578         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 579         return err;
 580 }
 581 EXPORT_SYMBOL(class_setup);
 582
 583 /** We have finished using this obd and are ready to destroy it.
 584  * There can be no more references to this obd.
 585  */
 586 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 587 {
 588         ENTRY;
 589
 590         if (obd->obd_set_up) {
 591                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 592                 RETURN(-EBUSY);
 593         }
 594
 595         spin_lock(&obd->obd_dev_lock);
 596         if (!obd->obd_attached) {
 597                 spin_unlock(&obd->obd_dev_lock);
 598                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 599                 RETURN(-ENODEV);
 600         }
 601         obd->obd_attached = 0;
 602         spin_unlock(&obd->obd_dev_lock);
 603
 604         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 605                obd->obd_name, obd->obd_uuid.uuid);
 606
 607         class_decref(obd, "attach", obd);
 608         RETURN(0);
 609 }
 610 EXPORT_SYMBOL(class_detach);
 611
 612 /** Start shutting down the obd.  There may be in-progess ops when
 613  * this is called.  We tell them to start shutting down with a call
 614  * to class_disconnect_exports().
 615  */
 616 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 617 {
 618         int err = 0;
 619         char *flag;
 620         ENTRY;
 621
 622         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 623
 624         if (!obd->obd_set_up) {
 625                 CERROR("Device %d not setup\n", obd->obd_minor);
 626                 RETURN(-ENODEV);
 627         }
 628
 629         spin_lock(&obd->obd_dev_lock);
 630         if (obd->obd_stopping) {
 631                 spin_unlock(&obd->obd_dev_lock);
 632                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 633                 RETURN(-ENODEV);
 634         }
 635         /* Leave this on forever */
 636         obd->obd_stopping = 1;
 637         spin_unlock(&obd->obd_dev_lock);
 638
 639         /* wait for already-arrived-connections to finish. */
 640         while (obd->obd_conn_inprogress > 0)
 641                 yield();
 642         smp_rmb();
 643
 644         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 645                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 646                         switch (*flag) {
 647                         case 'F':
 648                                 obd->obd_force = 1;
 649                                 break;
 650                         case 'A':
 651                                 LCONSOLE_WARN("Failing over %s\n",
 652                                               obd->obd_name);
 653                                 obd->obd_fail = 1;
 654                                 obd->obd_no_transno = 1;
 655                                 obd->obd_no_recov = 1;
 656                                 if (OBP(obd, iocontrol)) {
 657                                         obd_iocontrol(OBD_IOC_SYNC,
 658                                                       obd->obd_self_export,
 659                                                       0, NULL, NULL);
 660                                 }
 661                                 break;
 662                         default:
 663                                 CERROR("Unrecognised flag '%c'\n", *flag);
 664                         }
 665         }
 666
 667         LASSERT(obd->obd_self_export);
 668
 669         /* The three references that should be remaining are the
 670          * obd_self_export and the attach and setup references. */
 671         if (atomic_read(&obd->obd_refcount) > 3) {
 672                 /* refcounf - 3 might be the number of real exports
 673                    (excluding self export). But class_incref is called
 674                    by other things as well, so don't count on it. */
 675                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 676                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 677                 dump_exports(obd, 0);
 678                 class_disconnect_exports(obd);
 679         }
 680
 681         /* Precleanup, we must make sure all exports get destroyed. */
 682         err = obd_precleanup(obd);
 683         if (err)
 684                 CERROR("Precleanup %s returned %d\n",
 685                        obd->obd_name, err);
 686
 687         /* destroy an uuid-export hash body */
 688         if (obd->obd_uuid_hash) {
 689                 cfs_hash_putref(obd->obd_uuid_hash);
 690                 obd->obd_uuid_hash = NULL;
 691         }
 692
 693         /* destroy a nid-export hash body */
 694         if (obd->obd_nid_hash) {
 695                 cfs_hash_putref(obd->obd_nid_hash);
 696                 obd->obd_nid_hash = NULL;
 697         }
 698
 699         /* destroy a nid-stats hash body */
 700         if (obd->obd_nid_stats_hash) {
 701                 cfs_hash_putref(obd->obd_nid_stats_hash);
 702                 obd->obd_nid_stats_hash = NULL;
 703         }
 704
 705         /* destroy a client_generation-export hash body */
 706         if (obd->obd_gen_hash) {
 707                 cfs_hash_putref(obd->obd_gen_hash);
 708                 obd->obd_gen_hash = NULL;
 709         }
 710
 711         class_decref(obd, "setup", obd);
 712         obd->obd_set_up = 0;
 713
 714         RETURN(0);
 715 }
 716
 717 struct obd_device *class_incref(struct obd_device *obd,
 718                                 const char *scope, const void *source)
 719 {
 720         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 721         atomic_inc(&obd->obd_refcount);
 722         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 723                atomic_read(&obd->obd_refcount));
 724
 725         return obd;
 726 }
 727 EXPORT_SYMBOL(class_incref);
 728
 729 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 730 {
 731         int err;
 732         int refs;
 733
 734         spin_lock(&obd->obd_dev_lock);
 735         atomic_dec(&obd->obd_refcount);
 736         refs = atomic_read(&obd->obd_refcount);
 737         spin_unlock(&obd->obd_dev_lock);
 738         lu_ref_del(&obd->obd_reference, scope, source);
 739
 740         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 741
 742         if ((refs == 1) && obd->obd_stopping) {
 743                 /* All exports have been destroyed; there should
 744                    be no more in-progress ops by this point.*/
 745
 746                 spin_lock(&obd->obd_self_export->exp_lock);
 747                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
 748                 spin_unlock(&obd->obd_self_export->exp_lock);
 749
 750                 /* note that we'll recurse into class_decref again */
 751                 class_unlink_export(obd->obd_self_export);
 752                 return;
 753         }
 754
 755         if (refs == 0) {
 756                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 757                        obd->obd_name, obd->obd_uuid.uuid);
 758                 LASSERT(!obd->obd_attached);
 759                 if (obd->obd_stopping) {
 760                         /* If we're not stopping, we were never set up */
 761                         err = obd_cleanup(obd);
 762                         if (err)
 763                                 CERROR("Cleanup %s returned %d\n",
 764                                        obd->obd_name, err);
 765                 }
 766
 767                 class_release_dev(obd);
 768         }
 769 }
 770 EXPORT_SYMBOL(class_decref);
 771
 772 /** Add a failover nid location.
 773  * Client obd types contact server obd types using this nid list.
 774  */
 775 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 776 {
 777         struct obd_import *imp;
 778         struct obd_uuid uuid;
 779         int rc;
 780         ENTRY;
 781
 782         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 783             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 784                 CERROR("invalid conn_uuid\n");
 785                 RETURN(-EINVAL);
 786         }
 787         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 788             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 789             strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) &&
 790             strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) &&
 791             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 792                 CERROR("can't add connection on non-client dev\n");
 793                 RETURN(-EINVAL);
 794         }
 795
 796         imp = obd->u.cli.cl_import;
 797         if (!imp) {
 798                 CERROR("try to add conn on immature client dev\n");
 799                 RETURN(-EINVAL);
 800         }
 801
 802         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 803         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 804
 805         RETURN(rc);
 806 }
 807
 808 /** Remove a failover nid location.
 809  */
 810 static int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 811 {
 812         struct obd_import *imp;
 813         struct obd_uuid uuid;
 814         int rc;
 815         ENTRY;
 816
 817         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 818             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 819                 CERROR("invalid conn_uuid\n");
 820                 RETURN(-EINVAL);
 821         }
 822         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 823             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 824                 CERROR("can't del connection on non-client dev\n");
 825                 RETURN(-EINVAL);
 826         }
 827
 828         imp = obd->u.cli.cl_import;
 829         if (!imp) {
 830                 CERROR("try to del conn on immature client dev\n");
 831                 RETURN(-EINVAL);
 832         }
 833
 834         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 835         rc = obd_del_conn(imp, &uuid);
 836
 837         RETURN(rc);
 838 }
 839
 840 static struct list_head lustre_profile_list =
 841         LIST_HEAD_INIT(lustre_profile_list);
 842 static DEFINE_SPINLOCK(lustre_profile_list_lock);
 843
 844 struct lustre_profile *class_get_profile(const char * prof)
 845 {
 846         struct lustre_profile *lprof;
 847
 848         ENTRY;
 849         spin_lock(&lustre_profile_list_lock);
 850         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 851                 if (!strcmp(lprof->lp_profile, prof)) {
 852                         lprof->lp_refs++;
 853                         spin_unlock(&lustre_profile_list_lock);
 854                         RETURN(lprof);
 855                 }
 856         }
 857         spin_unlock(&lustre_profile_list_lock);
 858         RETURN(NULL);
 859 }
 860 EXPORT_SYMBOL(class_get_profile);
 861
 862 /** Create a named "profile".
 863  * This defines the mdc and osc names to use for a client.
 864  * This also is used to define the lov to be used by a mdt.
 865  */
 866 static int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 867                              int mdclen, char *mdc)
 868 {
 869         struct lustre_profile *lprof;
 870         int err = 0;
 871         ENTRY;
 872
 873         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 874
 875         OBD_ALLOC(lprof, sizeof(*lprof));
 876         if (lprof == NULL)
 877                 RETURN(-ENOMEM);
 878         INIT_LIST_HEAD(&lprof->lp_list);
 879
 880         LASSERT(proflen == (strlen(prof) + 1));
 881         OBD_ALLOC(lprof->lp_profile, proflen);
 882         if (lprof->lp_profile == NULL)
 883                 GOTO(out, err = -ENOMEM);
 884         memcpy(lprof->lp_profile, prof, proflen);
 885
 886         LASSERT(osclen == (strlen(osc) + 1));
 887         OBD_ALLOC(lprof->lp_dt, osclen);
 888         if (lprof->lp_dt == NULL)
 889                 GOTO(out, err = -ENOMEM);
 890         memcpy(lprof->lp_dt, osc, osclen);
 891
 892         if (mdclen > 0) {
 893                 LASSERT(mdclen == (strlen(mdc) + 1));
 894                 OBD_ALLOC(lprof->lp_md, mdclen);
 895                 if (lprof->lp_md == NULL)
 896                         GOTO(out, err = -ENOMEM);
 897                 memcpy(lprof->lp_md, mdc, mdclen);
 898         }
 899
 900         spin_lock(&lustre_profile_list_lock);
 901         lprof->lp_refs = 1;
 902         lprof->lp_list_deleted = false;
 903
 904         list_add(&lprof->lp_list, &lustre_profile_list);
 905         spin_unlock(&lustre_profile_list_lock);
 906         RETURN(err);
 907
 908 out:
 909         if (lprof->lp_md)
 910                 OBD_FREE(lprof->lp_md, mdclen);
 911         if (lprof->lp_dt)
 912                 OBD_FREE(lprof->lp_dt, osclen);
 913         if (lprof->lp_profile)
 914                 OBD_FREE(lprof->lp_profile, proflen);
 915         OBD_FREE(lprof, sizeof(*lprof));
 916         RETURN(err);
 917 }
 918
 919 void class_del_profile(const char *prof)
 920 {
 921         struct lustre_profile *lprof;
 922         ENTRY;
 923
 924         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 925
 926         lprof = class_get_profile(prof);
 927         if (lprof) {
 928                 spin_lock(&lustre_profile_list_lock);
 929                 /* because get profile increments the ref counter */
 930                 lprof->lp_refs--;
 931                 list_del(&lprof->lp_list);
 932                 lprof->lp_list_deleted = true;
 933                 spin_unlock(&lustre_profile_list_lock);
 934
 935                 class_put_profile(lprof);
 936         }
 937         EXIT;
 938 }
 939 EXPORT_SYMBOL(class_del_profile);
 940
 941 void class_put_profile(struct lustre_profile *lprof)
 942 {
 943         spin_lock(&lustre_profile_list_lock);
 944         if ((--lprof->lp_refs) > 0) {
 945                 LASSERT(lprof->lp_refs > 0);
 946                 spin_unlock(&lustre_profile_list_lock);
 947                 return;
 948         }
 949         spin_unlock(&lustre_profile_list_lock);
 950
 951         /* confirm not a negative number */
 952         LASSERT(lprof->lp_refs == 0);
 953
 954         /* At least one class_del_profile/profiles must be called
 955          * on the target profile or lustre_profile_list will corrupt */
 956         LASSERT(lprof->lp_list_deleted);
 957         OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 958         OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 959         if (lprof->lp_md != NULL)
 960                 OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 961         OBD_FREE(lprof, sizeof(*lprof));
 962 }
 963 EXPORT_SYMBOL(class_put_profile);
 964
 965 /* COMPAT_146 */
 966 void class_del_profiles(void)
 967 {
 968         struct lustre_profile *lprof, *n;
 969         ENTRY;
 970
 971         spin_lock(&lustre_profile_list_lock);
 972         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 973                 list_del(&lprof->lp_list);
 974                 lprof->lp_list_deleted = true;
 975                 spin_unlock(&lustre_profile_list_lock);
 976
 977                 class_put_profile(lprof);
 978
 979                 spin_lock(&lustre_profile_list_lock);
 980         }
 981         spin_unlock(&lustre_profile_list_lock);
 982         EXIT;
 983 }
 984 EXPORT_SYMBOL(class_del_profiles);
 985
 986 static int class_set_global(char *ptr, int val, struct lustre_cfg *lcfg)
 987 {
 988         ENTRY;
 989         if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
 990                 at_min = val;
 991         else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
 992                 at_max = val;
 993         else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
 994                 at_extra = val;
 995         else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
 996                 at_early_margin = val;
 997         else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
 998                 at_history = val;
 999         else if (class_match_param(ptr, PARAM_JOBID_VAR, NULL) == 0)
1000                 strlcpy(obd_jobid_var, lustre_cfg_string(lcfg, 2),
1001                         JOBSTATS_JOBID_VAR_MAX_LEN + 1);
1002         else
1003                 RETURN(-EINVAL);
1004
1005         CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
1006         RETURN(0);
1007 }
1008
1009
1010 /* We can't call ll_process_config or lquota_process_config directly because
1011  * it lives in a module that must be loaded after this one. */
1012 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
1013 static int (*quota_process_config)(struct lustre_cfg *lcfg) = NULL;
1014
1015 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
1016 {
1017         client_process_config = cpc;
1018 }
1019 EXPORT_SYMBOL(lustre_register_client_process_config);
1020
1021 /**
1022  * Rename the proc parameter in \a cfg with a new name \a new_name.
1023  *
1024  * \param cfg      config structure which contains the proc parameter
1025  * \param new_name new name of the proc parameter
1026  *
1027  * \retval valid-pointer    pointer to the newly-allocated config structure
1028  *                          which contains the renamed proc parameter
1029  * \retval ERR_PTR(-EINVAL) if \a cfg or \a new_name is NULL, or \a cfg does
1030  *                          not contain a proc parameter
1031  * \retval ERR_PTR(-ENOMEM) if memory allocation failure occurs
1032  */
1033 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
1034                                      const char *new_name)
1035 {
1036         struct lustre_cfg_bufs  *bufs = NULL;
1037         struct lustre_cfg       *new_cfg = NULL;
1038         char                    *param = NULL;
1039         char                    *new_param = NULL;
1040         char                    *value = NULL;
1041         int                      name_len = 0;
1042         int                      new_len = 0;
1043         ENTRY;
1044
1045         if (cfg == NULL || new_name == NULL)
1046                 RETURN(ERR_PTR(-EINVAL));
1047
1048         param = lustre_cfg_string(cfg, 1);
1049         if (param == NULL)
1050                 RETURN(ERR_PTR(-EINVAL));
1051
1052         value = strchr(param, '=');
1053         if (value == NULL)
1054                 name_len = strlen(param);
1055         else
1056                 name_len = value - param;
1057
1058         new_len = LUSTRE_CFG_BUFLEN(cfg, 1) + strlen(new_name) - name_len;
1059
1060         OBD_ALLOC(new_param, new_len);
1061         if (new_param == NULL)
1062                 RETURN(ERR_PTR(-ENOMEM));
1063
1064         strcpy(new_param, new_name);
1065         if (value != NULL)
1066                 strcat(new_param, value);
1067
1068         OBD_ALLOC_PTR(bufs);
1069         if (bufs == NULL) {
1070                 OBD_FREE(new_param, new_len);
1071                 RETURN(ERR_PTR(-ENOMEM));
1072         }
1073
1074         lustre_cfg_bufs_reset(bufs, NULL);
1075         lustre_cfg_bufs_init(bufs, cfg);
1076         lustre_cfg_bufs_set_string(bufs, 1, new_param);
1077
1078         new_cfg = lustre_cfg_new(cfg->lcfg_command, bufs);
1079         OBD_FREE(new_param, new_len);
1080         OBD_FREE_PTR(bufs);
1081         if (new_cfg == NULL)
1082                 RETURN(ERR_PTR(-ENOMEM));
1083
1084         new_cfg->lcfg_num = cfg->lcfg_num;
1085         new_cfg->lcfg_flags = cfg->lcfg_flags;
1086         new_cfg->lcfg_nid = cfg->lcfg_nid;
1087         new_cfg->lcfg_nal = cfg->lcfg_nal;
1088
1089         RETURN(new_cfg);
1090 }
1091 EXPORT_SYMBOL(lustre_cfg_rename);
1092
1093 static int process_param2_config(struct lustre_cfg *lcfg)
1094 {
1095         char *param = lustre_cfg_string(lcfg, 1);
1096         char *upcall = lustre_cfg_string(lcfg, 2);
1097         char *argv[] = {
1098                 [0] = "/usr/sbin/lctl",
1099                 [1] = "set_param",
1100                 [2] = param,
1101                 [3] = NULL
1102         };
1103         struct timeval  start;
1104         struct timeval  end;
1105         int             rc;
1106         ENTRY;
1107
1108         /* Add upcall processing here. Now only lctl is supported */
1109         if (strcmp(upcall, LCTL_UPCALL) != 0) {
1110                 CERROR("Unsupported upcall %s\n", upcall);
1111                 RETURN(-EINVAL);
1112         }
1113
1114         do_gettimeofday(&start);
1115         rc = call_usermodehelper(argv[0], argv, NULL, UMH_WAIT_PROC);
1116         do_gettimeofday(&end);
1117
1118         if (rc < 0) {
1119                 CERROR("lctl: error invoking upcall %s %s %s: rc = %d; "
1120                        "time %ldus\n", argv[0], argv[1], argv[2], rc,
1121                        cfs_timeval_sub(&end, &start, NULL));
1122         } else {
1123                 CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
1124                        argv[0], argv[1], argv[2],
1125                        cfs_timeval_sub(&end, &start, NULL));
1126                        rc = 0;
1127         }
1128
1129         RETURN(rc);
1130 }
1131
1132 void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
1133 {
1134         quota_process_config = qpc;
1135 }
1136 EXPORT_SYMBOL(lustre_register_quota_process_config);
1137
1138 /** Process configuration commands given in lustre_cfg form.
1139  * These may come from direct calls (e.g. class_manual_cleanup)
1140  * or processing the config llog, or ioctl from lctl.
1141  */
1142 int class_process_config(struct lustre_cfg *lcfg)
1143 {
1144         struct obd_device *obd;
1145         int err;
1146
1147         LASSERT(lcfg && !IS_ERR(lcfg));
1148         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
1149
1150         /* Commands that don't need a device */
1151         switch(lcfg->lcfg_command) {
1152         case LCFG_ATTACH: {
1153                 err = class_attach(lcfg);
1154                 GOTO(out, err);
1155         }
1156         case LCFG_ADD_UUID: {
1157                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
1158                        " (%s)\n", lustre_cfg_string(lcfg, 1),
1159                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
1160
1161                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
1162                 GOTO(out, err);
1163         }
1164         case LCFG_DEL_UUID: {
1165                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
1166                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
1167                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
1168
1169                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
1170                 GOTO(out, err);
1171         }
1172         case LCFG_MOUNTOPT: {
1173                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
1174                        lustre_cfg_string(lcfg, 1),
1175                        lustre_cfg_string(lcfg, 2),
1176                        lustre_cfg_string(lcfg, 3));
1177                 /* set these mount options somewhere, so ll_fill_super
1178                  * can find them. */
1179                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
1180                                         lustre_cfg_string(lcfg, 1),
1181                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
1182                                         lustre_cfg_string(lcfg, 2),
1183                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
1184                                         lustre_cfg_string(lcfg, 3));
1185                 GOTO(out, err);
1186         }
1187         case LCFG_DEL_MOUNTOPT: {
1188                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
1189                        lustre_cfg_string(lcfg, 1));
1190                 class_del_profile(lustre_cfg_string(lcfg, 1));
1191                 GOTO(out, err = 0);
1192         }
1193         case LCFG_SET_TIMEOUT: {
1194                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
1195                        obd_timeout, lcfg->lcfg_num);
1196                 obd_timeout = max(lcfg->lcfg_num, 1U);
1197                 obd_timeout_set = 1;
1198                 GOTO(out, err = 0);
1199         }
1200         case LCFG_SET_LDLM_TIMEOUT: {
1201                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
1202                        ldlm_timeout, lcfg->lcfg_num);
1203                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
1204                 if (ldlm_timeout >= obd_timeout)
1205                         ldlm_timeout = max(obd_timeout / 3, 1U);
1206                 ldlm_timeout_set = 1;
1207                 GOTO(out, err = 0);
1208         }
1209         case LCFG_SET_UPCALL: {
1210                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
1211                 /* COMPAT_146 Don't fail on old configs */
1212                 GOTO(out, err = 0);
1213         }
1214         case LCFG_MARKER: {
1215                 struct cfg_marker *marker;
1216                 marker = lustre_cfg_buf(lcfg, 1);
1217                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
1218                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
1219                 GOTO(out, err = 0);
1220         }
1221         case LCFG_PARAM: {
1222                 char *tmp;
1223                 /* llite has no obd */
1224                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
1225                                        PARAM_LLITE, NULL) == 0) &&
1226                     client_process_config) {
1227                         err = (*client_process_config)(lcfg);
1228                         GOTO(out, err);
1229                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1230                                               PARAM_SYS, &tmp) == 0)) {
1231                         /* Global param settings */
1232                         err = class_set_global(tmp, lcfg->lcfg_num, lcfg);
1233                         /*
1234                          * Client or server should not fail to mount if
1235                          * it hits an unknown configuration parameter.
1236                          */
1237                         if (err != 0)
1238                                 CWARN("Ignoring unknown param %s\n", tmp);
1239
1240                         GOTO(out, err = 0);
1241                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1242                                               PARAM_QUOTA, &tmp) == 0) &&
1243                            quota_process_config) {
1244                         err = (*quota_process_config)(lcfg);
1245                         GOTO(out, err);
1246                 }
1247
1248                 break;
1249         }
1250         case LCFG_SET_PARAM: {
1251                 err = process_param2_config(lcfg);
1252                 GOTO(out, err = 0);
1253         }
1254         }
1255         /* Commands that require a device */
1256         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1257         if (obd == NULL) {
1258                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
1259                         CERROR("this lcfg command requires a device name\n");
1260                 else
1261                         CERROR("no device for: %s\n",
1262                                lustre_cfg_string(lcfg, 0));
1263
1264                 GOTO(out, err = -EINVAL);
1265         }
1266
1267         switch(lcfg->lcfg_command) {
1268         case LCFG_SETUP: {
1269                 err = class_setup(obd, lcfg);
1270                 GOTO(out, err);
1271         }
1272         case LCFG_DETACH: {
1273                 err = class_detach(obd, lcfg);
1274                 GOTO(out, err = 0);
1275         }
1276         case LCFG_CLEANUP: {
1277                 err = class_cleanup(obd, lcfg);
1278                 GOTO(out, err = 0);
1279         }
1280         case LCFG_ADD_CONN: {
1281                 err = class_add_conn(obd, lcfg);
1282                 GOTO(out, err = 0);
1283         }
1284         case LCFG_DEL_CONN: {
1285                 err = class_del_conn(obd, lcfg);
1286                 GOTO(out, err = 0);
1287         }
1288         case LCFG_POOL_NEW: {
1289                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
1290                 GOTO(out, err = 0);
1291         }
1292         case LCFG_POOL_ADD: {
1293                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1294                                    lustre_cfg_string(lcfg, 3));
1295                 GOTO(out, err = 0);
1296         }
1297         case LCFG_POOL_REM: {
1298                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1299                                    lustre_cfg_string(lcfg, 3));
1300                 GOTO(out, err = 0);
1301         }
1302         case LCFG_POOL_DEL: {
1303                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
1304                 GOTO(out, err = 0);
1305         }
1306         default: {
1307                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
1308                 GOTO(out, err);
1309
1310         }
1311         }
1312 out:
1313         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
1314                 CWARN("Ignoring error %d on optional command %#x\n", err,
1315                       lcfg->lcfg_command);
1316                 err = 0;
1317         }
1318         return err;
1319 }
1320 EXPORT_SYMBOL(class_process_config);
1321
1322 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
1323                              struct lustre_cfg *lcfg, void *data)
1324 {
1325         struct lprocfs_vars *var;
1326         struct file fakefile;
1327         struct seq_file fake_seqfile;
1328         char *key, *sval;
1329         int i, keylen, vallen;
1330         int matched = 0, j = 0;
1331         int rc = 0;
1332         int skip = 0;
1333         ENTRY;
1334
1335         if (lcfg->lcfg_command != LCFG_PARAM) {
1336                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1337                 RETURN(-EINVAL);
1338         }
1339
1340         /* fake a seq file so that var->fops->write can work... */
1341         fakefile.private_data = &fake_seqfile;
1342         fake_seqfile.private = data;
1343         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1344            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1345            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1346         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1347                 key = lustre_cfg_buf(lcfg, i);
1348                 /* Strip off prefix */
1349                 if (class_match_param(key, prefix, &key))
1350                         /* If the prefix doesn't match, return error so we
1351                          * can pass it down the stack */
1352                         RETURN(-ENOSYS);
1353                 sval = strchr(key, '=');
1354                 if (!sval || (*(sval + 1) == 0)) {
1355                         CERROR("Can't parse param %s (missing '=')\n", key);
1356                         /* rc = -EINVAL;        continue parsing other params */
1357                         continue;
1358                 }
1359                 keylen = sval - key;
1360                 sval++;
1361                 vallen = strlen(sval);
1362                 matched = 0;
1363                 j = 0;
1364                 /* Search proc entries */
1365                 while (lvars[j].name) {
1366                         var = &lvars[j];
1367                         if (class_match_param(key, var->name, NULL) == 0 &&
1368                             keylen == strlen(var->name)) {
1369                                 matched++;
1370                                 rc = -EROFS;
1371
1372                                 if (var->fops && var->fops->write) {
1373                                         mm_segment_t oldfs;
1374                                         oldfs = get_fs();
1375                                         set_fs(KERNEL_DS);
1376                                         rc = (var->fops->write)(&fakefile, sval,
1377                                                                 vallen, NULL);
1378                                         set_fs(oldfs);
1379                                 }
1380                                 break;
1381                         }
1382                         j++;
1383                 }
1384                 if (!matched) {
1385                         CERROR("%.*s: %s unknown param %s\n",
1386                                (int)strlen(prefix) - 1, prefix,
1387                                (char *)lustre_cfg_string(lcfg, 0), key);
1388                         /* rc = -EINVAL;        continue parsing other params */
1389                         skip++;
1390                 } else if (rc < 0) {
1391                         CERROR("%s: error writing proc entry '%s': rc = %d\n",
1392                                prefix, var->name, rc);
1393                         rc = 0;
1394                 } else {
1395                         CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1396                                          lustre_cfg_string(lcfg, 0),
1397                                          (int)strlen(prefix) - 1, prefix,
1398                                          (int)(sval - key - 1), key, sval);
1399                 }
1400         }
1401
1402         if (rc > 0)
1403                 rc = 0;
1404         if (!rc && skip)
1405                 rc = skip;
1406         RETURN(rc);
1407 }
1408 EXPORT_SYMBOL(class_process_proc_param);
1409
1410 /*
1411  * Supplemental functions for config logs, it allocates lustre_cfg
1412  * buffers plus initialized llog record header at the beginning.
1413  */
1414 struct llog_cfg_rec *lustre_cfg_rec_new(int cmd, struct lustre_cfg_bufs *bufs)
1415 {
1416         struct llog_cfg_rec     *lcr;
1417         int                      reclen;
1418
1419         ENTRY;
1420
1421         reclen = lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen);
1422         reclen = llog_data_len(reclen) + sizeof(struct llog_rec_hdr) +
1423                  sizeof(struct llog_rec_tail);
1424
1425         OBD_ALLOC(lcr, reclen);
1426         if (lcr == NULL)
1427                 RETURN(NULL);
1428
1429         lustre_cfg_init(&lcr->lcr_cfg, cmd, bufs);
1430
1431         lcr->lcr_hdr.lrh_len = reclen;
1432         lcr->lcr_hdr.lrh_type = OBD_CFG_REC;
1433
1434         RETURN(lcr);
1435 }
1436 EXPORT_SYMBOL(lustre_cfg_rec_new);
1437
1438 void lustre_cfg_rec_free(struct llog_cfg_rec *lcr)
1439 {
1440         ENTRY;
1441         OBD_FREE(lcr, lcr->lcr_hdr.lrh_len);
1442         EXIT;
1443 }
1444 EXPORT_SYMBOL(lustre_cfg_rec_free);
1445
1446 /** Parse a configuration llog, doing various manipulations on them
1447  * for various reasons, (modifications for compatibility, skip obsolete
1448  * records, change uuids, etc), then class_process_config() resulting
1449  * net records.
1450  */
1451 int class_config_llog_handler(const struct lu_env *env,
1452                               struct llog_handle *handle,
1453                               struct llog_rec_hdr *rec, void *data)
1454 {
1455         struct config_llog_instance *clli = data;
1456         int cfg_len = rec->lrh_len;
1457         char *cfg_buf = (char*) (rec + 1);
1458         int rc = 0;
1459         ENTRY;
1460
1461         //class_config_dump_handler(handle, rec, data);
1462
1463         switch (rec->lrh_type) {
1464         case OBD_CFG_REC: {
1465                 struct lustre_cfg *lcfg, *lcfg_new;
1466                 struct lustre_cfg_bufs bufs;
1467                 char *inst_name = NULL;
1468                 int inst_len = 0;
1469                 int inst = 0, swab = 0;
1470
1471                 lcfg = (struct lustre_cfg *)cfg_buf;
1472                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1473                         lustre_swab_lustre_cfg(lcfg);
1474                         swab = 1;
1475                 }
1476
1477                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1478                 if (rc)
1479                         GOTO(out, rc);
1480
1481                 /* Figure out config state info */
1482                 if (lcfg->lcfg_command == LCFG_MARKER) {
1483                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1484                         lustre_swab_cfg_marker(marker, swab,
1485                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1486                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1487                                clli->cfg_flags, marker->cm_flags);
1488                         if (marker->cm_flags & CM_START) {
1489                                 /* all previous flags off */
1490                                 clli->cfg_flags = CFG_F_MARKER;
1491                                 server_name2index(marker->cm_tgtname,
1492                                                   &clli->cfg_lwp_idx, NULL);
1493                                 if (marker->cm_flags & CM_SKIP) {
1494                                         clli->cfg_flags |= CFG_F_SKIP;
1495                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1496                                                marker->cm_step);
1497                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1498                                            (clli->cfg_sb &&
1499                                             lustre_check_exclusion(clli->cfg_sb,
1500                                                          marker->cm_tgtname))) {
1501                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1502                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1503                                                marker->cm_step);
1504                                 }
1505                         } else if (marker->cm_flags & CM_END) {
1506                                 clli->cfg_flags = 0;
1507                         }
1508                 }
1509                 /* A config command without a start marker before it is
1510                    illegal (post 146) */
1511                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1512                     !(clli->cfg_flags & CFG_F_MARKER) &&
1513                     (lcfg->lcfg_command != LCFG_MARKER)) {
1514                         CWARN("Config not inside markers, ignoring! "
1515                               "(inst: %p, uuid: %s, flags: %#x)\n",
1516                               clli->cfg_instance,
1517                               clli->cfg_uuid.uuid, clli->cfg_flags);
1518                         clli->cfg_flags |= CFG_F_SKIP;
1519                 }
1520                 if (clli->cfg_flags & CFG_F_SKIP) {
1521                         CDEBUG(D_CONFIG, "skipping %#x\n",
1522                                clli->cfg_flags);
1523                         rc = 0;
1524                         /* No processing! */
1525                         break;
1526                 }
1527
1528                 /*
1529                  * For interoperability between 1.8 and 2.0,
1530                  * rename "mds" obd device type to "mdt".
1531                  */
1532                 {
1533                         char *typename = lustre_cfg_string(lcfg, 1);
1534                         char *index = lustre_cfg_string(lcfg, 2);
1535
1536                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1537                              strcmp(typename, "mds") == 0)) {
1538                                 CWARN("For 1.8 interoperability, rename obd "
1539                                        "type from mds to mdt\n");
1540                                 typename[2] = 't';
1541                         }
1542                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1543                              strcmp(index, "type") == 0)) {
1544                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1545                                        "set this index to '0'\n");
1546                                 index[0] = '0';
1547                                 index[1] = 0;
1548                         }
1549                 }
1550
1551 #ifdef HAVE_SERVER_SUPPORT
1552                 /* newer MDS replaces LOV/OSC with LOD/OSP */
1553                 {
1554                         char *typename = lustre_cfg_string(lcfg, 1);
1555
1556                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1557                             strcmp(typename, LUSTRE_LOV_NAME) == 0) &&
1558                             IS_MDT(s2lsi(clli->cfg_sb))) {
1559                                 CDEBUG(D_CONFIG,
1560                                        "For 2.x interoperability, rename obd "
1561                                        "type from lov to lod (%s)\n",
1562                                        s2lsi(clli->cfg_sb)->lsi_svname);
1563                                 strcpy(typename, LUSTRE_LOD_NAME);
1564                         }
1565                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1566                             strcmp(typename, LUSTRE_OSC_NAME) == 0) &&
1567                             IS_MDT(s2lsi(clli->cfg_sb))) {
1568                                 CDEBUG(D_CONFIG,
1569                                        "For 2.x interoperability, rename obd "
1570                                        "type from osc to osp (%s)\n",
1571                                        s2lsi(clli->cfg_sb)->lsi_svname);
1572                                 strcpy(typename, LUSTRE_OSP_NAME);
1573                         }
1574                 }
1575 #endif /* HAVE_SERVER_SUPPORT */
1576
1577                 if (clli->cfg_flags & CFG_F_EXCLUDE) {
1578                         CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
1579                                lcfg->lcfg_command);
1580                         if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
1581                                 /* Add inactive instead */
1582                                 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1583                 }
1584
1585                 lustre_cfg_bufs_init(&bufs, lcfg);
1586
1587                 if (clli && clli->cfg_instance &&
1588                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1589                         inst = 1;
1590                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1591                                    sizeof(clli->cfg_instance) * 2 + 4;
1592                         OBD_ALLOC(inst_name, inst_len);
1593                         if (inst_name == NULL)
1594                                 GOTO(out, rc = -ENOMEM);
1595                         sprintf(inst_name, "%s-%p",
1596                                 lustre_cfg_string(lcfg, 0),
1597                                 clli->cfg_instance);
1598                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1599                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1600                                lcfg->lcfg_command, inst_name);
1601                 }
1602
1603                 /* we override the llog's uuid for clients, to insure they
1604                 are unique */
1605                 if (clli && clli->cfg_instance != NULL &&
1606                     lcfg->lcfg_command == LCFG_ATTACH) {
1607                         lustre_cfg_bufs_set_string(&bufs, 2,
1608                                                    clli->cfg_uuid.uuid);
1609                 }
1610                 /*
1611                  * sptlrpc config record, we expect 2 data segments:
1612                  *  [0]: fs_name/target_name,
1613                  *  [1]: rule string
1614                  * moving them to index [1] and [2], and insert MGC's
1615                  * obdname at index [0].
1616                  */
1617                 if (clli && clli->cfg_instance == NULL &&
1618                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1619                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1620                                             bufs.lcfg_buflen[1]);
1621                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1622                                             bufs.lcfg_buflen[0]);
1623                         lustre_cfg_bufs_set_string(&bufs, 0,
1624                                                    clli->cfg_obdname);
1625                 }
1626
1627                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1628                 if (lcfg_new == NULL)
1629                         GOTO(out, rc = -ENOMEM);
1630
1631                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1632                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1633
1634                 /* XXX Hack to try to remain binary compatible with
1635                  * pre-newconfig logs */
1636                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1637                     (lcfg->lcfg_nid >> 32) == 0) {
1638                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1639
1640                         lcfg_new->lcfg_nid =
1641                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1642                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1643                               lcfg->lcfg_nal, addr,
1644                               libcfs_nid2str(lcfg_new->lcfg_nid));
1645                 } else {
1646                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1647                 }
1648
1649                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1650
1651                 rc = class_process_config(lcfg_new);
1652                 lustre_cfg_free(lcfg_new);
1653
1654                 if (inst)
1655                         OBD_FREE(inst_name, inst_len);
1656                 break;
1657         }
1658         default:
1659                 CERROR("Unknown llog record type %#x encountered\n",
1660                        rec->lrh_type);
1661                 break;
1662         }
1663 out:
1664         if (rc) {
1665                 CERROR("%s: cfg command failed: rc = %d\n",
1666                        handle->lgh_ctxt->loc_obd->obd_name, rc);
1667                 class_config_dump_handler(NULL, handle, rec, data);
1668         }
1669         RETURN(rc);
1670 }
1671 EXPORT_SYMBOL(class_config_llog_handler);
1672
1673 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1674                             char *name, struct config_llog_instance *cfg)
1675 {
1676         struct llog_process_cat_data     cd = {0, 0};
1677         struct llog_handle              *llh;
1678         llog_cb_t                        callback;
1679         int                              rc;
1680         ENTRY;
1681
1682         CDEBUG(D_INFO, "looking up llog %s\n", name);
1683         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1684         if (rc)
1685                 RETURN(rc);
1686
1687         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1688         if (rc)
1689                 GOTO(parse_out, rc);
1690
1691         /* continue processing from where we last stopped to end-of-log */
1692         if (cfg) {
1693                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1694                 callback = cfg->cfg_callback;
1695                 LASSERT(callback != NULL);
1696         } else {
1697                 callback = class_config_llog_handler;
1698         }
1699
1700         cd.lpcd_last_idx = 0;
1701
1702         rc = llog_process(env, llh, callback, cfg, &cd);
1703
1704         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1705                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1706         if (cfg)
1707                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1708
1709 parse_out:
1710         llog_close(env, llh);
1711         RETURN(rc);
1712 }
1713 EXPORT_SYMBOL(class_config_parse_llog);
1714
1715 static struct lcfg_type_data {
1716         __u32    ltd_type;
1717         char    *ltd_name;
1718         char    *ltd_bufs[4];
1719 } lcfg_data_table[] = {
1720         { LCFG_ATTACH, "attach", { "type", "UUID", "3", "4" } },
1721         { LCFG_DETACH, "detach", { "1", "2", "3", "4" } },
1722         { LCFG_SETUP, "setup", { "UUID", "node", "options", "failout" } },
1723         { LCFG_CLEANUP, "cleanup", { "1", "2", "3", "4" } },
1724         { LCFG_ADD_UUID, "add_uuid", { "node", "2", "3", "4" }  },
1725         { LCFG_DEL_UUID, "del_uuid", { "1", "2", "3", "4" }  },
1726         { LCFG_MOUNTOPT, "new_profile", { "name", "lov", "lmv", "4" }  },
1727         { LCFG_DEL_MOUNTOPT, "del_mountopt", { "1", "2", "3", "4" } , },
1728         { LCFG_SET_TIMEOUT, "set_timeout", { "parameter", "2", "3", "4" }  },
1729         { LCFG_SET_UPCALL, "set_upcall", { "1", "2", "3", "4" }  },
1730         { LCFG_ADD_CONN, "add_conn", { "node", "2", "3", "4" }  },
1731         { LCFG_DEL_CONN, "del_conn", { "1", "2", "3", "4" }  },
1732         { LCFG_LOV_ADD_OBD, "add_osc", { "ost", "index", "gen", "UUID" } },
1733         { LCFG_LOV_DEL_OBD, "del_osc", { "1", "2", "3", "4" } },
1734         { LCFG_PARAM, "set_param", { "parameter", "value", "3", "4" } },
1735         { LCFG_MARKER, "marker", { "1", "2", "3", "4" } },
1736         { LCFG_LOG_START, "log_start", { "1", "2", "3", "4" } },
1737         { LCFG_LOG_END, "log_end", { "1", "2", "3", "4" } },
1738         { LCFG_LOV_ADD_INA, "add_osc_inactive", { "1", "2", "3", "4" }  },
1739         { LCFG_ADD_MDC, "add_mdc", { "mdt", "index", "gen", "UUID" } },
1740         { LCFG_DEL_MDC, "del_mdc", { "1", "2", "3", "4" } },
1741         { LCFG_SPTLRPC_CONF, "security", { "parameter", "2", "3", "4" } },
1742         { LCFG_POOL_NEW, "new_pool", { "fsname", "pool", "3", "4" }  },
1743         { LCFG_POOL_ADD, "add_pool", { "fsname", "pool", "ost", "4" } },
1744         { LCFG_POOL_REM, "remove_pool", { "fsname", "pool", "ost", "4" } },
1745         { LCFG_POOL_DEL, "del_pool", { "fsname", "pool", "3", "4" } },
1746         { LCFG_SET_LDLM_TIMEOUT, "set_ldlm_timeout",
1747           { "parameter", "2", "3", "4" } },
1748         { 0, NULL, { NULL, NULL, NULL, NULL } }
1749 };
1750
1751 static struct lcfg_type_data *lcfg_cmd2data(__u32 cmd)
1752 {
1753         int i = 0;
1754
1755         while (lcfg_data_table[i].ltd_type != 0) {
1756                 if (lcfg_data_table[i].ltd_type == cmd)
1757                         return &lcfg_data_table[i];
1758                 i++;
1759         }
1760         return NULL;
1761 }
1762
1763 /**
1764  * parse config record and output dump in supplied buffer.
1765  * This is separated from class_config_dump_handler() to use
1766  * for ioctl needs as well
1767  *
1768  * Sample Output:
1769  * - { event: attach, device: lustrewt-clilov, type: lov, UUID:
1770  *     lustrewt-clilov_UUID }
1771  */
1772 int class_config_yaml_output(struct llog_rec_hdr *rec, char *buf, int size)
1773 {
1774         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1775         char                    *ptr = buf;
1776         char                    *end = buf + size;
1777         int                      rc = 0, i;
1778         struct lcfg_type_data   *ldata;
1779
1780         LASSERT(rec->lrh_type == OBD_CFG_REC);
1781         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1782         if (rc < 0)
1783                 return rc;
1784
1785         ldata = lcfg_cmd2data(lcfg->lcfg_command);
1786         if (ldata == NULL)
1787                 return -ENOTTY;
1788
1789         if (lcfg->lcfg_command == LCFG_MARKER)
1790                 return 0;
1791
1792         /* form YAML entity */
1793         ptr += snprintf(ptr, end - ptr, "- { event: %s", ldata->ltd_name);
1794
1795         if (lcfg->lcfg_flags)
1796                 ptr += snprintf(ptr, end - ptr, ", flags: %#08x",
1797                                 lcfg->lcfg_flags);
1798         if (lcfg->lcfg_num)
1799                 ptr += snprintf(ptr, end - ptr, ", num: %#08x",
1800                                 lcfg->lcfg_num);
1801         if (lcfg->lcfg_nid) {
1802                 char nidstr[LNET_NIDSTR_SIZE];
1803
1804                 libcfs_nid2str_r(lcfg->lcfg_nid, nidstr, sizeof(nidstr));
1805                 ptr += snprintf(ptr, end - ptr, ", nid: %s("LPX64")",
1806                                 nidstr, lcfg->lcfg_nid);
1807         }
1808
1809         if (LUSTRE_CFG_BUFLEN(lcfg, 0) > 0)
1810                 ptr += snprintf(ptr, end - ptr, ", device: %s",
1811                                 lustre_cfg_string(lcfg, 0));
1812
1813         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1814                 if (LUSTRE_CFG_BUFLEN(lcfg, i) > 0)
1815                         ptr += snprintf(ptr, end - ptr, ", %s: %s",
1816                                         ldata->ltd_bufs[i - 1],
1817                                         lustre_cfg_string(lcfg, i));
1818         }
1819
1820         ptr += snprintf(ptr, end - ptr, " }\n");
1821         /* return consumed bytes */
1822         rc = ptr - buf;
1823         return rc;
1824 }
1825
1826 /**
1827  * parse config record and output dump in supplied buffer.
1828  * This is separated from class_config_dump_handler() to use
1829  * for ioctl needs as well
1830  */
1831 static int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
1832 {
1833         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1834         char                    *ptr = buf;
1835         char                    *end = buf + size;
1836         int                      rc = 0;
1837
1838         ENTRY;
1839
1840         LASSERT(rec->lrh_type == OBD_CFG_REC);
1841         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1842         if (rc < 0)
1843                 RETURN(rc);
1844
1845         ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
1846         if (lcfg->lcfg_flags)
1847                 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1848                                 lcfg->lcfg_flags);
1849
1850         if (lcfg->lcfg_num)
1851                 ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
1852
1853         if (lcfg->lcfg_nid) {
1854                 char nidstr[LNET_NIDSTR_SIZE];
1855
1856                 libcfs_nid2str_r(lcfg->lcfg_nid, nidstr, sizeof(nidstr));
1857                 ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1858                                 nidstr, lcfg->lcfg_nid);
1859         }
1860
1861         if (lcfg->lcfg_command == LCFG_MARKER) {
1862                 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1863
1864                 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1865                                 marker->cm_step, marker->cm_flags,
1866                                 marker->cm_tgtname, marker->cm_comment);
1867         } else {
1868                 int i;
1869
1870                 for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1871                         ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1872                                         lustre_cfg_string(lcfg, i));
1873                 }
1874         }
1875         ptr += snprintf(ptr, end - ptr, "\n");
1876         /* return consumed bytes */
1877         rc = ptr - buf;
1878         RETURN(rc);
1879 }
1880
1881 int class_config_dump_handler(const struct lu_env *env,
1882                               struct llog_handle *handle,
1883                               struct llog_rec_hdr *rec, void *data)
1884 {
1885         char    *outstr;
1886         int      rc = 0;
1887
1888         ENTRY;
1889
1890         OBD_ALLOC(outstr, 256);
1891         if (outstr == NULL)
1892                 RETURN(-ENOMEM);
1893
1894         if (rec->lrh_type == OBD_CFG_REC) {
1895                 class_config_parse_rec(rec, outstr, 256);
1896                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1897         } else {
1898                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1899                 rc = -EINVAL;
1900         }
1901
1902         OBD_FREE(outstr, 256);
1903         RETURN(rc);
1904 }
1905
1906 /** Call class_cleanup and class_detach.
1907  * "Manual" only in the sense that we're faking lcfg commands.
1908  */
1909 int class_manual_cleanup(struct obd_device *obd)
1910 {
1911         char                    flags[3] = "";
1912         struct lustre_cfg      *lcfg;
1913         struct lustre_cfg_bufs  bufs;
1914         int                     rc;
1915         ENTRY;
1916
1917         if (!obd) {
1918                 CERROR("empty cleanup\n");
1919                 RETURN(-EALREADY);
1920         }
1921
1922         if (obd->obd_force)
1923                 strcat(flags, "F");
1924         if (obd->obd_fail)
1925                 strcat(flags, "A");
1926
1927         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1928                obd->obd_name, flags);
1929
1930         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1931         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1932         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1933         if (lcfg == NULL)
1934                 RETURN(-ENOMEM);
1935
1936         rc = class_process_config(lcfg);
1937         if (rc) {
1938                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1939                 GOTO(out, rc);
1940         }
1941
1942         /* the lcfg is almost the same for both ops */
1943         lcfg->lcfg_command = LCFG_DETACH;
1944         rc = class_process_config(lcfg);
1945         if (rc)
1946                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1947 out:
1948         lustre_cfg_free(lcfg);
1949         RETURN(rc);
1950 }
1951 EXPORT_SYMBOL(class_manual_cleanup);
1952
1953 /*
1954  * uuid<->export lustre hash operations
1955  */
1956
1957 static unsigned
1958 uuid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
1959 {
1960         return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
1961                                   sizeof(((struct obd_uuid *)key)->uuid), mask);
1962 }
1963
1964 static void *
1965 uuid_key(struct hlist_node *hnode)
1966 {
1967         struct obd_export *exp;
1968
1969         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1970
1971         return &exp->exp_client_uuid;
1972 }
1973
1974 /*
1975  * NOTE: It is impossible to find an export that is in failed
1976  *       state with this function
1977  */
1978 static int
1979 uuid_keycmp(const void *key, struct hlist_node *hnode)
1980 {
1981         struct obd_export *exp;
1982
1983         LASSERT(key);
1984         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1985
1986         return obd_uuid_equals(key, &exp->exp_client_uuid) &&
1987                !exp->exp_failed;
1988 }
1989
1990 static void *
1991 uuid_export_object(struct hlist_node *hnode)
1992 {
1993         return hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1994 }
1995
1996 static void
1997 uuid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
1998 {
1999         struct obd_export *exp;
2000
2001         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2002         class_export_get(exp);
2003 }
2004
2005 static void
2006 uuid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2007 {
2008         struct obd_export *exp;
2009
2010         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2011         class_export_put(exp);
2012 }
2013
2014 static struct cfs_hash_ops uuid_hash_ops = {
2015         .hs_hash        = uuid_hash,
2016         .hs_key         = uuid_key,
2017         .hs_keycmp      = uuid_keycmp,
2018         .hs_object      = uuid_export_object,
2019         .hs_get         = uuid_export_get,
2020         .hs_put_locked  = uuid_export_put_locked,
2021 };
2022
2023
2024 /*
2025  * nid<->export hash operations
2026  */
2027
2028 static unsigned
2029 nid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
2030 {
2031         return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
2032 }
2033
2034 static void *
2035 nid_key(struct hlist_node *hnode)
2036 {
2037         struct obd_export *exp;
2038
2039         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2040
2041         RETURN(&exp->exp_connection->c_peer.nid);
2042 }
2043
2044 /*
2045  * NOTE: It is impossible to find an export that is in failed
2046  *       state with this function
2047  */
2048 static int
2049 nid_kepcmp(const void *key, struct hlist_node *hnode)
2050 {
2051         struct obd_export *exp;
2052
2053         LASSERT(key);
2054         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2055
2056         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
2057                !exp->exp_failed);
2058 }
2059
2060 static void *
2061 nid_export_object(struct hlist_node *hnode)
2062 {
2063         return hlist_entry(hnode, struct obd_export, exp_nid_hash);
2064 }
2065
2066 static void
2067 nid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
2068 {
2069         struct obd_export *exp;
2070
2071         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2072         class_export_get(exp);
2073 }
2074
2075 static void
2076 nid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2077 {
2078         struct obd_export *exp;
2079
2080         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
2081         class_export_put(exp);
2082 }
2083
2084 static struct cfs_hash_ops nid_hash_ops = {
2085         .hs_hash        = nid_hash,
2086         .hs_key         = nid_key,
2087         .hs_keycmp      = nid_kepcmp,
2088         .hs_object      = nid_export_object,
2089         .hs_get         = nid_export_get,
2090         .hs_put_locked  = nid_export_put_locked,
2091 };
2092
2093
2094 /*
2095  * nid<->nidstats hash operations
2096  */
2097
2098 static void *
2099 nidstats_key(struct hlist_node *hnode)
2100 {
2101         struct nid_stat *ns;
2102
2103         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2104
2105         return &ns->nid;
2106 }
2107
2108 static int
2109 nidstats_keycmp(const void *key, struct hlist_node *hnode)
2110 {
2111         return *(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key;
2112 }
2113
2114 static void *
2115 nidstats_object(struct hlist_node *hnode)
2116 {
2117         return hlist_entry(hnode, struct nid_stat, nid_hash);
2118 }
2119
2120 static void
2121 nidstats_get(struct cfs_hash *hs, struct hlist_node *hnode)
2122 {
2123         struct nid_stat *ns;
2124
2125         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2126         nidstat_getref(ns);
2127 }
2128
2129 static void
2130 nidstats_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2131 {
2132         struct nid_stat *ns;
2133
2134         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2135         nidstat_putref(ns);
2136 }
2137
2138 static struct cfs_hash_ops nid_stat_hash_ops = {
2139         .hs_hash        = nid_hash,
2140         .hs_key         = nidstats_key,
2141         .hs_keycmp      = nidstats_keycmp,
2142         .hs_object      = nidstats_object,
2143         .hs_get         = nidstats_get,
2144         .hs_put_locked  = nidstats_put_locked,
2145 };
2146
2147
2148 /*
2149  * client_generation<->export hash operations
2150  */
2151
2152 static unsigned
2153 gen_hash(struct cfs_hash *hs, const void *key, unsigned mask)
2154 {
2155         return cfs_hash_djb2_hash(key, sizeof(__u32), mask);
2156 }
2157
2158 static void *
2159 gen_key(struct hlist_node *hnode)
2160 {
2161         struct obd_export *exp;
2162
2163         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2164
2165         RETURN(&exp->exp_target_data.ted_lcd->lcd_generation);
2166 }
2167
2168 /*
2169  * NOTE: It is impossible to find an export that is in failed
2170  *       state with this function
2171  */
2172 static int
2173 gen_kepcmp(const void *key, struct hlist_node *hnode)
2174 {
2175         struct obd_export *exp;
2176
2177         LASSERT(key);
2178         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2179
2180         RETURN(exp->exp_target_data.ted_lcd->lcd_generation == *(__u32 *)key &&
2181                !exp->exp_failed);
2182 }
2183
2184 static void *
2185 gen_export_object(struct hlist_node *hnode)
2186 {
2187         return hlist_entry(hnode, struct obd_export, exp_gen_hash);
2188 }
2189
2190 static void
2191 gen_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
2192 {
2193         struct obd_export *exp;
2194
2195         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2196         class_export_get(exp);
2197 }
2198
2199 static void
2200 gen_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2201 {
2202         struct obd_export *exp;
2203
2204         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2205         class_export_put(exp);
2206 }
2207
2208 static struct cfs_hash_ops gen_hash_ops = {
2209         .hs_hash        = gen_hash,
2210         .hs_key         = gen_key,
2211         .hs_keycmp      = gen_kepcmp,
2212         .hs_object      = gen_export_object,
2213         .hs_get         = gen_export_get,
2214         .hs_put_locked  = gen_export_put_locked,
2215 };