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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/obdclass/obd_config.c
  33  *
  34  * Config API
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_CLASS
  38
  39 #include <linux/kobject.h>
  40 #include <linux/string.h>
  41
  42 #include <llog_swab.h>
  43 #include <lprocfs_status.h>
  44 #include <lustre_disk.h>
  45 #include <uapi/linux/lustre/lustre_ioctl.h>
  46 #include <lustre_log.h>
  47 #include <uapi/linux/lustre/lustre_param.h>
  48 #include <obd_class.h>
  49
  50 #include "llog_internal.h"
  51
  52 #ifdef HAVE_SERVER_SUPPORT
  53 static struct cfs_hash_ops nid_stat_hash_ops;
  54 static struct cfs_hash_ops gen_hash_ops;
  55 #endif /* HAVE_SERVER_SUPPORT */
  56
  57 /*
  58  * uuid<->export lustre hash operations
  59  */
  60 /*
  61  * NOTE: It is impossible to find an export that is in failed
  62  *      state with this function
  63  */
  64 static int
  65 uuid_keycmp(struct rhashtable_compare_arg *arg, const void *obj)
  66 {
  67         const struct obd_uuid *uuid = arg->key;
  68         const struct obd_export *exp = obj;
  69
  70         if (obd_uuid_equals(uuid, &exp->exp_client_uuid) &&
  71             !exp->exp_failed)
  72                 return 0;
  73         return -ESRCH;
  74 }
  75
  76 static void
  77 obd_export_exit(void *vexport, void *data)
  78 {
  79         struct obd_export *exp = vexport;
  80
  81         class_export_put(exp);
  82 }
  83
  84 static const struct rhashtable_params uuid_hash_params = {
  85         .key_len        = sizeof(struct obd_uuid),
  86         .key_offset     = offsetof(struct obd_export, exp_client_uuid),
  87         .head_offset    = offsetof(struct obd_export, exp_uuid_hash),
  88         .obj_cmpfn      = uuid_keycmp,
  89         .max_size       = MAX_OBD_DEVICES,
  90         .automatic_shrinking = true,
  91 };
  92
  93 int obd_uuid_add(struct obd_device *obd, struct obd_export *export)
  94 {
  95         int rc;
  96
  97         class_export_get(export);
  98         rcu_read_lock();
  99         rc = rhashtable_lookup_insert_fast(&obd->obd_uuid_hash,
 100                                            &export->exp_uuid_hash,
 101                                            uuid_hash_params);
 102         if (rc) {
 103                 class_export_put(export);
 104                 if (rc != -EEXIST) {
 105                         /* map obscure error codes to -ENOMEM */
 106                         rc = -ENOMEM;
 107                 } else {
 108                         rc = -EALREADY;
 109                 }
 110         }
 111         rcu_read_unlock();
 112
 113         return rc;
 114 }
 115 EXPORT_SYMBOL(obd_uuid_add);
 116
 117 void obd_uuid_del(struct obd_device *obd, struct obd_export *export)
 118 {
 119         int rc;
 120
 121         rcu_read_lock();
 122         rc = rhashtable_remove_fast(&obd->obd_uuid_hash,
 123                                     &export->exp_uuid_hash,
 124                                     uuid_hash_params);
 125         if (!rc)
 126                 class_export_put(export);
 127         rcu_read_unlock();
 128 }
 129 EXPORT_SYMBOL(obd_uuid_del);
 130
 131 #ifdef HAVE_SERVER_SUPPORT
 132 /* obd_uuid_lookup() is used only server side by target_handle_connect(),
 133  * mdt_hsm_agent_send(), and obd_export_evict_by_uuid().
 134  */
 135 struct obd_export *obd_uuid_lookup(struct obd_device *obd,
 136                                    struct obd_uuid *uuid)
 137 {
 138         struct obd_export *export = NULL;
 139
 140         rcu_read_lock();
 141         export = rhashtable_lookup_fast(&obd->obd_uuid_hash, uuid,
 142                                         uuid_hash_params);
 143         if (export && !refcount_inc_not_zero(&export->exp_handle.h_ref))
 144                 export = NULL;
 145         rcu_read_unlock();
 146
 147         return export;
 148 }
 149 EXPORT_SYMBOL(obd_uuid_lookup);
 150
 151 /*
 152  * nid<->export hash operations
 153  */
 154 static u32 nid_keyhash(const void *data, u32 key_len, u32 seed)
 155 {
 156         const struct obd_export *exp = data;
 157         void *key;
 158
 159         if (!exp->exp_connection)
 160                 return 0;
 161
 162         key = &exp->exp_connection->c_peer.nid;
 163         return jhash2(key, key_len / sizeof(u32), seed);
 164 }
 165
 166 /*
 167  * NOTE: It is impossible to find an export that is in failed
 168  *       state with this function
 169  */
 170 static int
 171 nid_keycmp(struct rhashtable_compare_arg *arg, const void *obj)
 172 {
 173         const lnet_nid_t *nid = arg->key;
 174         const struct obd_export *exp = obj;
 175
 176         if (exp->exp_connection->c_peer.nid == *nid && !exp->exp_failed)
 177                 return 0;
 178
 179         return -ESRCH;
 180 }
 181
 182 static void
 183 nid_export_exit(void *vexport, void *data)
 184 {
 185         struct obd_export *exp = vexport;
 186
 187         class_export_put(exp);
 188 }
 189
 190 static const struct rhashtable_params nid_hash_params = {
 191         .key_len                = sizeof(lnet_nid_t),
 192         .head_offset            = offsetof(struct obd_export, exp_nid_hash),
 193         .obj_hashfn             = nid_keyhash,
 194         .obj_cmpfn              = nid_keycmp,
 195         .automatic_shrinking    = true,
 196 };
 197
 198 int obd_nid_add(struct obd_device *obd, struct obd_export *exp)
 199 {
 200         int rc;
 201
 202         if (exp == exp->exp_obd->obd_self_export || exp->exp_hashed)
 203                 return 0;
 204
 205         class_export_get(exp);
 206         rc = rhltable_insert_key(&obd->obd_nid_hash,
 207                                  &exp->exp_connection->c_peer.nid,
 208                                  &exp->exp_nid_hash,
 209                                  nid_hash_params);
 210         if (rc) {
 211                 class_export_put(exp);
 212                 /* map obscure error codes to -ENOMEM */
 213                 rc = -ENOMEM;
 214         } else {
 215                 exp->exp_hashed = 1;
 216         }
 217         return rc;
 218 }
 219 EXPORT_SYMBOL(obd_nid_add);
 220
 221 void obd_nid_del(struct obd_device *obd, struct obd_export *exp)
 222 {
 223         int rc;
 224
 225         if (exp == exp->exp_obd->obd_self_export || !exp->exp_hashed)
 226                 return;
 227
 228         rc = rhltable_remove(&obd->obd_nid_hash, &exp->exp_nid_hash,
 229                              nid_hash_params);
 230         if (rc == 0) {
 231                 class_export_put(exp);
 232                 exp->exp_hashed = 0;
 233         }
 234 }
 235 EXPORT_SYMBOL(obd_nid_del);
 236
 237 int obd_nid_export_for_each(struct obd_device *obd, lnet_nid_t nid,
 238                             int cb(struct obd_export *exp, void *data),
 239                             void *data)
 240 {
 241         struct rhlist_head *exports, *tmp;
 242         struct obd_export *exp;
 243         int ret = 0;
 244
 245         rcu_read_lock();
 246         exports = rhltable_lookup(&obd->obd_nid_hash, &nid, nid_hash_params);
 247         if (!exports) {
 248                 ret = -ENODEV;
 249                 goto out_unlock;
 250         }
 251
 252         rhl_for_each_entry_rcu(exp, tmp, exports, exp_nid_hash) {
 253                 if (cb(exp, data))
 254                         ret++;
 255         }
 256
 257 out_unlock:
 258         rcu_read_unlock();
 259         return ret;
 260 }
 261 EXPORT_SYMBOL(obd_nid_export_for_each);
 262 #endif /* HAVE_SERVER_SUPPORT */
 263
 264 /*********** string parsing utils *********/
 265
 266 /* returns 0 if we find this key in the buffer, else 1 */
 267 int class_find_param(char *buf, char *key, char **valp)
 268 {
 269         char *ptr;
 270
 271         if (!buf)
 272                 return 1;
 273
 274         ptr = strstr(buf, key);
 275         if (!ptr)
 276                 return 1;
 277
 278         if (valp)
 279                 *valp = ptr + strlen(key);
 280
 281         return 0;
 282 }
 283 EXPORT_SYMBOL(class_find_param);
 284
 285 /**
 286  * Check whether the proc parameter \a param is an old parameter or not from
 287  * the array \a ptr which contains the mapping from old parameters to new ones.
 288  * If it's an old one, then return the pointer to the cfg_interop_param struc-
 289  * ture which contains both the old and new parameters.
 290  *
 291  * \param param                 proc parameter
 292  * \param ptr                   an array which contains the mapping from
 293  *                              old parameters to new ones
 294  *
 295  * \retval valid-pointer        pointer to the cfg_interop_param structure
 296  *                              which contains the old and new parameters
 297  * \retval NULL                 \a param or \a ptr is NULL,
 298  *                              or \a param is not an old parameter
 299  */
 300 struct cfg_interop_param *class_find_old_param(const char *param,
 301                                                struct cfg_interop_param *ptr)
 302 {
 303         char *value = NULL;
 304         int   name_len = 0;
 305
 306         if (!param || !ptr)
 307                 RETURN(NULL);
 308
 309         value = strchr(param, '=');
 310         if (value)
 311                 name_len = value - param;
 312         else
 313                 name_len = strlen(param);
 314
 315         while (ptr->old_param) {
 316                 if (strncmp(param, ptr->old_param, name_len) == 0 &&
 317                     name_len == strlen(ptr->old_param))
 318                         RETURN(ptr);
 319                 ptr++;
 320         }
 321
 322         RETURN(NULL);
 323 }
 324 EXPORT_SYMBOL(class_find_old_param);
 325
 326 /**
 327  * Finds a parameter in \a params and copies it to \a copy.
 328  *
 329  * Leading spaces are skipped. Next space or end of string is the
 330  * parameter terminator with the exception that spaces inside single or double
 331  * quotes get included into a parameter. The parameter is copied into \a copy
 332  * which has to be allocated big enough by a caller, quotes are stripped in
 333  * the copy and the copy is terminated by 0.
 334  *
 335  * On return \a params is set to next parameter or to NULL if last
 336  * parameter is returned.
 337  *
 338  * \retval 0 if parameter is returned in \a copy
 339  * \retval 1 otherwise
 340  * \retval -EINVAL if unbalanced quota is found
 341  */
 342 int class_get_next_param(char **params, char *copy)
 343 {
 344         char *q1, *q2, *str;
 345         int len;
 346
 347         str = *params;
 348         while (*str == ' ')
 349                 str++;
 350
 351         if (*str == '\0') {
 352                 *params = NULL;
 353                 return 1;
 354         }
 355
 356         while (1) {
 357                 q1 = strpbrk(str, " '\"");
 358                 if (!q1) {
 359                         len = strlen(str);
 360                         memcpy(copy, str, len);
 361                         copy[len] = '\0';
 362                         *params = NULL;
 363                         return 0;
 364                 }
 365                 len = q1 - str;
 366                 if (*q1 == ' ') {
 367                         memcpy(copy, str, len);
 368                         copy[len] = '\0';
 369                         *params = str + len;
 370                         return 0;
 371                 }
 372
 373                 memcpy(copy, str, len);
 374                 copy += len;
 375
 376                 /* search for the matching closing quote */
 377                 str = q1 + 1;
 378                 q2 = strchr(str, *q1);
 379                 if (!q2) {
 380                         CERROR("Unbalanced quota in parameters: \"%s\"\n",
 381                                *params);
 382                         return -EINVAL;
 383                 }
 384                 len = q2 - str;
 385                 memcpy(copy, str, len);
 386                 copy += len;
 387                 str = q2 + 1;
 388         }
 389         return 1;
 390 }
 391 EXPORT_SYMBOL(class_get_next_param);
 392
 393 /*
 394  * returns 0 if this is the first key in the buffer, else 1.
 395  * valp points to first char after key.
 396  */
 397 int class_match_param(char *buf, const char *key, char **valp)
 398 {
 399         if (!buf)
 400                 return 1;
 401
 402         if (memcmp(buf, key, strlen(key)) != 0)
 403                 return 1;
 404
 405         if (valp)
 406                 *valp = buf + strlen(key);
 407
 408         return 0;
 409 }
 410 EXPORT_SYMBOL(class_match_param);
 411
 412 static int parse_nid(char *buf, void *value, int quiet)
 413 {
 414         lnet_nid_t *nid = (lnet_nid_t *)value;
 415
 416         *nid = libcfs_str2nid(buf);
 417         if (*nid != LNET_NID_ANY)
 418                 return 0;
 419
 420         if (!quiet)
 421                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
 422         return -EINVAL;
 423 }
 424
 425 static int parse_net(char *buf, void *value)
 426 {
 427         __u32 *net = (__u32 *)value;
 428
 429         *net = libcfs_str2net(buf);
 430         CDEBUG(D_INFO, "Net %s\n", libcfs_net2str(*net));
 431         return 0;
 432 }
 433
 434 enum {
 435         CLASS_PARSE_NID = 1,
 436         CLASS_PARSE_NET,
 437 };
 438
 439 /*
 440  * 0 is good NID,
 441  * 1 not found
 442  * < 0 error
 443  * endh is set to next separator
 444  */
 445 static int class_parse_value(char *buf, int opc, void *value, char **endh,
 446                              int quiet)
 447 {
 448         char *endp;
 449         char  tmp;
 450         int   rc = 0;
 451
 452         if (!buf)
 453                 return 1;
 454         while (*buf == ',' || *buf == ':')
 455                 buf++;
 456         if (*buf == ' ' || *buf == '/' || *buf == '\0')
 457                 return 1;
 458
 459         /* NID separators or end of NIDs */
 460         endp = strpbrk(buf, ",: /");
 461         if (!endp)
 462                 endp = buf + strlen(buf);
 463
 464         tmp = *endp;
 465         *endp = '\0';
 466         switch (opc) {
 467         default:
 468                 LBUG();
 469         case CLASS_PARSE_NID:
 470                 rc = parse_nid(buf, value, quiet);
 471                 break;
 472         case CLASS_PARSE_NET:
 473                 rc = parse_net(buf, value);
 474                 break;
 475         }
 476         *endp = tmp;
 477         if (rc != 0)
 478                 return rc;
 479         if (endh)
 480                 *endh = endp;
 481         return 0;
 482 }
 483
 484 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
 485 {
 486         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 0);
 487 }
 488 EXPORT_SYMBOL(class_parse_nid);
 489
 490 int class_parse_nid_quiet(char *buf, lnet_nid_t *nid, char **endh)
 491 {
 492         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 1);
 493 }
 494 EXPORT_SYMBOL(class_parse_nid_quiet);
 495
 496 int class_parse_net(char *buf, __u32 *net, char **endh)
 497 {
 498         return class_parse_value(buf, CLASS_PARSE_NET, (void *)net, endh, 0);
 499 }
 500
 501 /*
 502  * 1 param contains key and match
 503  * 0 param contains key and not match
 504  * -1 param does not contain key
 505  */
 506 int class_match_nid(char *buf, char *key, lnet_nid_t nid)
 507 {
 508         lnet_nid_t tmp;
 509         int rc = -1;
 510
 511         while (class_find_param(buf, key, &buf) == 0) {
 512                 /*
 513                  * please restrict to the NIDs pertaining to
 514                  * the specified NIDs
 515                  */
 516                 while (class_parse_nid(buf, &tmp, &buf) == 0) {
 517                         if (tmp == nid)
 518                                 return 1;
 519                 }
 520                 rc = 0;
 521         }
 522         return rc;
 523 }
 524
 525 int class_match_net(char *buf, char *key, __u32 net)
 526 {
 527         __u32 tmp;
 528         int rc = -1;
 529
 530         while (class_find_param(buf, key, &buf) == 0) {
 531                 /*
 532                  * please restrict to the NIDs pertaining to
 533                  * the specified networks
 534                  */
 535                 while (class_parse_net(buf, &tmp, &buf) == 0) {
 536                         if (tmp == net)
 537                                 return 1;
 538                 }
 539                 rc = 0;
 540         }
 541         return rc;
 542 }
 543
 544 char *lustre_cfg_string(struct lustre_cfg *lcfg, u32 index)
 545 {
 546         char *s;
 547
 548         if (!lcfg->lcfg_buflens[index])
 549                 return NULL;
 550
 551         s = lustre_cfg_buf(lcfg, index);
 552         if (!s)
 553                 return NULL;
 554
 555         /*
 556          * make sure it's NULL terminated, even if this kills a char
 557          * of data.  Try to use the padding first though.
 558          */
 559         if (s[lcfg->lcfg_buflens[index] - 1] != '\0') {
 560                 size_t last = ALIGN(lcfg->lcfg_buflens[index], 8) - 1;
 561                 char lost;
 562
 563                 /* Use the smaller value */
 564                 if (last > lcfg->lcfg_buflens[index])
 565                         last = lcfg->lcfg_buflens[index];
 566
 567                 lost = s[last];
 568                 s[last] = '\0';
 569                 if (lost != '\0') {
 570                         CWARN("Truncated buf %d to '%s' (lost '%c'...)\n",
 571                               index, s, lost);
 572                 }
 573         }
 574         return s;
 575 }
 576 EXPORT_SYMBOL(lustre_cfg_string);
 577
 578 /********************** class fns **********************/
 579
 580 /**
 581  * Create a new OBD device and set the type, name and uuid.  If successful,
 582  * the new device can be accessed by either name or uuid.
 583  */
 584 int class_attach(struct lustre_cfg *lcfg)
 585 {
 586         struct obd_export *exp;
 587         struct obd_device *obd = NULL;
 588         char *typename, *name, *uuid;
 589         int rc, len;
 590
 591         ENTRY;
 592
 593         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 594                 CERROR("No type passed!\n");
 595                 RETURN(-EINVAL);
 596         }
 597         typename = lustre_cfg_string(lcfg, 1);
 598
 599         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
 600                 CERROR("No name passed!\n");
 601                 RETURN(-EINVAL);
 602         }
 603         name = lustre_cfg_string(lcfg, 0);
 604         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
 605                 CERROR("No UUID passed!\n");
 606                 RETURN(-EINVAL);
 607         }
 608
 609         uuid = lustre_cfg_string(lcfg, 2);
 610         len = strlen(uuid);
 611         if (len >= sizeof(obd->obd_uuid)) {
 612                 CERROR("%s: uuid must be < %d bytes long\n",
 613                        name, (int)sizeof(obd->obd_uuid));
 614                 RETURN(-EINVAL);
 615         }
 616
 617         obd = class_newdev(typename, name, uuid);
 618         if (IS_ERR(obd)) { /* Already exists or out of obds */
 619                 rc = PTR_ERR(obd);
 620                 CERROR("Cannot create device %s of type %s : %d\n",
 621                        name, typename, rc);
 622                 RETURN(rc);
 623         }
 624         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 625                  "obd %p obd_magic %08X != %08X\n",
 626                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 627         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
 628                  "%p obd_name %s != %s\n", obd, obd->obd_name, name);
 629
 630         exp = class_new_export_self(obd, &obd->obd_uuid);
 631         if (IS_ERR(exp)) {
 632                 rc = PTR_ERR(exp);
 633                 class_free_dev(obd);
 634                 RETURN(rc);
 635         }
 636
 637         obd->obd_self_export = exp;
 638         list_del_init(&exp->exp_obd_chain_timed);
 639         class_export_put(exp);
 640
 641         rc = class_register_device(obd);
 642         if (rc != 0) {
 643                 class_decref(obd, "newdev", obd);
 644                 RETURN(rc);
 645         }
 646
 647         obd->obd_attached = 1;
 648         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 649                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 650
 651         RETURN(0);
 652 }
 653 EXPORT_SYMBOL(class_attach);
 654
 655 /**
 656  * Create hashes, self-export, and call type-specific setup.
 657  * Setup is effectively the "start this obd" call.
 658  */
 659 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 660 {
 661         int err = 0;
 662
 663         ENTRY;
 664
 665         LASSERT(obd != NULL);
 666         LASSERTF(obd == class_num2obd(obd->obd_minor),
 667                  "obd %p != obd_devs[%d] %p\n",
 668                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 669         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 670                  "obd %p obd_magic %08x != %08x\n",
 671                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 672
 673         /* have we attached a type to this device? */
 674         if (!obd->obd_attached) {
 675                 CERROR("Device %d not attached\n", obd->obd_minor);
 676                 RETURN(-ENODEV);
 677         }
 678
 679         if (obd->obd_set_up) {
 680                 CERROR("Device %d already setup (type %s)\n",
 681                        obd->obd_minor, obd->obd_type->typ_name);
 682                 RETURN(-EEXIST);
 683         }
 684
 685         /* is someone else setting us up right now? (attach inits spinlock) */
 686         spin_lock(&obd->obd_dev_lock);
 687         if (obd->obd_starting) {
 688                 spin_unlock(&obd->obd_dev_lock);
 689                 CERROR("Device %d setup in progress (type %s)\n",
 690                        obd->obd_minor, obd->obd_type->typ_name);
 691                 RETURN(-EEXIST);
 692         }
 693         /*
 694          * just leave this on forever.  I can't use obd_set_up here because
 695          * other fns check that status, and we're not actually set up yet.
 696          */
 697         obd->obd_starting = 1;
 698         obd->obd_nid_stats_hash = NULL;
 699         obd->obd_gen_hash = NULL;
 700         spin_unlock(&obd->obd_dev_lock);
 701
 702         /* create an uuid-export lustre hash */
 703         err = rhashtable_init(&obd->obd_uuid_hash, &uuid_hash_params);
 704         if (err)
 705                 GOTO(err_starting, err);
 706
 707 #ifdef HAVE_SERVER_SUPPORT
 708         /* create a nid-export lustre hash */
 709         err = rhltable_init(&obd->obd_nid_hash, &nid_hash_params);
 710         if (err)
 711                 GOTO(err_uuid_hash, err = -ENOMEM);
 712
 713         /* create a nid-stats lustre hash */
 714         obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
 715                                                   HASH_NID_STATS_CUR_BITS,
 716                                                   HASH_NID_STATS_MAX_BITS,
 717                                                   HASH_NID_STATS_BKT_BITS, 0,
 718                                                   CFS_HASH_MIN_THETA,
 719                                                   CFS_HASH_MAX_THETA,
 720                                                   &nid_stat_hash_ops,
 721                                                   CFS_HASH_DEFAULT);
 722         if (!obd->obd_nid_stats_hash)
 723                 GOTO(err_nid_hash, err = -ENOMEM);
 724
 725         /* create a client_generation-export lustre hash */
 726         obd->obd_gen_hash = cfs_hash_create("UUID_HASH",
 727                                             HASH_GEN_CUR_BITS,
 728                                             HASH_GEN_MAX_BITS,
 729                                             HASH_GEN_BKT_BITS, 0,
 730                                             CFS_HASH_MIN_THETA,
 731                                             CFS_HASH_MAX_THETA,
 732                                             &gen_hash_ops, CFS_HASH_DEFAULT);
 733         if (!obd->obd_gen_hash)
 734                 GOTO(err_nid_stats_hash, err = -ENOMEM);
 735 #endif /* HAVE_SERVER_SUPPORT */
 736
 737         err = obd_setup(obd, lcfg);
 738         if (err)
 739 #ifdef HAVE_SERVER_SUPPORT
 740                 GOTO(err_gen_hash, err);
 741 #else
 742                 GOTO(err_uuid_hash, err);
 743 #endif /* ! HAVE_SERVER_SUPPORT */
 744
 745         obd->obd_set_up = 1;
 746
 747         spin_lock(&obd->obd_dev_lock);
 748         /* cleanup drops this */
 749         class_incref(obd, "setup", obd);
 750         spin_unlock(&obd->obd_dev_lock);
 751
 752         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 753                obd->obd_name, obd->obd_uuid.uuid);
 754
 755         RETURN(0);
 756
 757 #ifdef HAVE_SERVER_SUPPORT
 758 err_gen_hash:
 759         if (obd->obd_gen_hash) {
 760                 cfs_hash_putref(obd->obd_gen_hash);
 761                 obd->obd_gen_hash = NULL;
 762         }
 763 err_nid_stats_hash:
 764         if (obd->obd_nid_stats_hash) {
 765                 cfs_hash_putref(obd->obd_nid_stats_hash);
 766                 obd->obd_nid_stats_hash = NULL;
 767         }
 768 err_nid_hash:
 769         rhltable_destroy(&obd->obd_nid_hash);
 770 #endif /* HAVE_SERVER_SUPPORT */
 771 err_uuid_hash:
 772         rhashtable_destroy(&obd->obd_uuid_hash);
 773 err_starting:
 774         obd->obd_starting = 0;
 775         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 776         return err;
 777 }
 778 EXPORT_SYMBOL(class_setup);
 779
 780 /**
 781  * We have finished using this OBD and are ready to destroy it.
 782  * There can be no more references to this obd.
 783  */
 784 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 785 {
 786         ENTRY;
 787
 788         if (obd->obd_set_up) {
 789                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 790                 RETURN(-EBUSY);
 791         }
 792
 793         spin_lock(&obd->obd_dev_lock);
 794         if (!obd->obd_attached) {
 795                 spin_unlock(&obd->obd_dev_lock);
 796                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 797                 RETURN(-ENODEV);
 798         }
 799         obd->obd_attached = 0;
 800         spin_unlock(&obd->obd_dev_lock);
 801
 802         /* cleanup in progress. we don't like to find this device after now */
 803         class_unregister_device(obd);
 804
 805         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 806                obd->obd_name, obd->obd_uuid.uuid);
 807
 808         class_decref(obd, "newdev", obd);
 809
 810         RETURN(0);
 811 }
 812 EXPORT_SYMBOL(class_detach);
 813
 814 /**
 815  * Start shutting down the OBD.  There may be in-progess ops when
 816  * this is called.  We tell them to start shutting down with a call
 817  * to class_disconnect_exports().
 818  */
 819 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 820 {
 821         int err = 0;
 822         char *flag;
 823         ENTRY;
 824
 825         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 826
 827         if (!obd->obd_set_up) {
 828                 CERROR("Device %d not setup\n", obd->obd_minor);
 829                 RETURN(-ENODEV);
 830         }
 831
 832         spin_lock(&obd->obd_dev_lock);
 833         if (obd->obd_stopping) {
 834                 spin_unlock(&obd->obd_dev_lock);
 835                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 836                 RETURN(-ENODEV);
 837         }
 838         /* Leave this on forever */
 839         obd->obd_stopping = 1;
 840         /*
 841          * function can't return error after that point, so clear setup flag
 842          * as early as possible to avoid finding via obd_devs / hash
 843          */
 844         obd->obd_set_up = 0;
 845         spin_unlock(&obd->obd_dev_lock);
 846
 847         /* wait for already-arrived-connections to finish. */
 848         while (obd->obd_conn_inprogress > 0)
 849                 yield();
 850         smp_rmb();
 851
 852         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 853                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 854                         switch (*flag) {
 855                         case 'F':
 856                                 obd->obd_force = 1;
 857                                 break;
 858                         case 'A':
 859                                 LCONSOLE_WARN("Failing over %s\n",
 860                                               obd->obd_name);
 861                                 spin_lock(&obd->obd_dev_lock);
 862                                 obd->obd_fail = 1;
 863 #ifdef HAVE_SERVER_SUPPORT
 864                                 obd->obd_no_transno = 1;
 865 #endif
 866                                 obd->obd_no_recov = 1;
 867                                 spin_unlock(&obd->obd_dev_lock);
 868                                 if (OBP(obd, iocontrol)) {
 869                                         obd_iocontrol(OBD_IOC_SYNC,
 870                                                       obd->obd_self_export,
 871                                                       0, NULL, NULL);
 872                                 }
 873                                 break;
 874                         default:
 875                                 CERROR("Unrecognised flag '%c'\n", *flag);
 876                         }
 877         }
 878
 879         LASSERT(obd->obd_self_export);
 880
 881         CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d/%d\n",
 882                obd->obd_name, obd->obd_num_exports,
 883                atomic_read(&obd->obd_refcount) - 2);
 884         dump_exports(obd, 0, D_HA);
 885         class_disconnect_exports(obd);
 886
 887         /* Precleanup, we must make sure all exports get destroyed. */
 888         err = obd_precleanup(obd);
 889         if (err)
 890                 CERROR("Precleanup %s returned %d\n",
 891                        obd->obd_name, err);
 892
 893         /* destroy an uuid-export hash body */
 894         rhashtable_free_and_destroy(&obd->obd_uuid_hash, obd_export_exit,
 895                                     NULL);
 896 #ifdef HAVE_SERVER_SUPPORT
 897         /* destroy a nid-export hash body */
 898         rhltable_free_and_destroy(&obd->obd_nid_hash, nid_export_exit, NULL);
 899
 900         /* destroy a nid-stats hash body */
 901         if (obd->obd_nid_stats_hash) {
 902                 cfs_hash_putref(obd->obd_nid_stats_hash);
 903                 obd->obd_nid_stats_hash = NULL;
 904         }
 905
 906         /* destroy a client_generation-export hash body */
 907         if (obd->obd_gen_hash) {
 908                 cfs_hash_putref(obd->obd_gen_hash);
 909                 obd->obd_gen_hash = NULL;
 910         }
 911 #endif /* HAVE_SERVER_SUPPORT */
 912         class_decref(obd, "setup", obd);
 913         obd->obd_set_up = 0;
 914
 915         RETURN(0);
 916 }
 917
 918 struct obd_device *class_incref(struct obd_device *obd,
 919                                 const char *scope,
 920                                 const void *source)
 921 {
 922         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 923         atomic_inc(&obd->obd_refcount);
 924         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 925                atomic_read(&obd->obd_refcount));
 926
 927         return obd;
 928 }
 929 EXPORT_SYMBOL(class_incref);
 930
 931 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 932 {
 933         int last;
 934
 935         CDEBUG(D_INFO, "Decref %s (%p) now %d - %s\n", obd->obd_name, obd,
 936                atomic_read(&obd->obd_refcount), scope);
 937
 938         LASSERT(obd->obd_num_exports >= 0);
 939         last = atomic_dec_and_test(&obd->obd_refcount);
 940         lu_ref_del(&obd->obd_reference, scope, source);
 941
 942         if (last) {
 943                 struct obd_export *exp;
 944
 945                 LASSERT(!obd->obd_attached);
 946                 /*
 947                  * All exports have been destroyed; there should
 948                  * be no more in-progress ops by this point.
 949                  */
 950                 exp = obd->obd_self_export;
 951
 952                 if (exp) {
 953                         exp->exp_flags |= exp_flags_from_obd(obd);
 954                         class_unlink_export(exp);
 955                 }
 956         }
 957 }
 958 EXPORT_SYMBOL(class_decref);
 959
 960 /**
 961  * Add a failover NID location.
 962  * Client OBD types contact server OBD types using this NID list.
 963  */
 964 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 965 {
 966         struct obd_import *imp;
 967         struct obd_uuid uuid;
 968         int rc;
 969
 970         ENTRY;
 971
 972         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 973             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 974                 CERROR("invalid conn_uuid\n");
 975                 RETURN(-EINVAL);
 976         }
 977         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 978             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 979             strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) &&
 980             strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) &&
 981             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 982                 CERROR("can't add connection on non-client dev\n");
 983                 RETURN(-EINVAL);
 984         }
 985
 986         imp = obd->u.cli.cl_import;
 987         if (!imp) {
 988                 CERROR("try to add conn on immature client dev\n");
 989                 RETURN(-EINVAL);
 990         }
 991
 992         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 993         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 994
 995         RETURN(rc);
 996 }
 997
 998 /** Remove a failover NID location. */
 999 static int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
1000 {
1001         struct obd_import *imp;
1002         struct obd_uuid uuid;
1003         int rc;
1004
1005         ENTRY;
1006
1007         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
1008             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
1009                 CERROR("invalid conn_uuid\n");
1010                 RETURN(-EINVAL);
1011         }
1012         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
1013             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
1014                 CERROR("can't del connection on non-client dev\n");
1015                 RETURN(-EINVAL);
1016         }
1017
1018         imp = obd->u.cli.cl_import;
1019         if (!imp) {
1020                 CERROR("try to del conn on immature client dev\n");
1021                 RETURN(-EINVAL);
1022         }
1023
1024         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
1025         rc = obd_del_conn(imp, &uuid);
1026
1027         RETURN(rc);
1028 }
1029
1030 static LIST_HEAD(lustre_profile_list);
1031 static DEFINE_SPINLOCK(lustre_profile_list_lock);
1032
1033 struct lustre_profile *class_get_profile(const char *prof)
1034 {
1035         struct lustre_profile *lprof;
1036
1037         ENTRY;
1038         spin_lock(&lustre_profile_list_lock);
1039         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
1040                 if (!strcmp(lprof->lp_profile, prof)) {
1041                         lprof->lp_refs++;
1042                         spin_unlock(&lustre_profile_list_lock);
1043                         RETURN(lprof);
1044                 }
1045         }
1046         spin_unlock(&lustre_profile_list_lock);
1047         RETURN(NULL);
1048 }
1049 EXPORT_SYMBOL(class_get_profile);
1050
1051 /**
1052  * Create a named "profile".
1053  * This defines the MDC and OSC names to use for a client.
1054  * This also is used to define the LOV to be used by a MDT.
1055  */
1056 static int class_add_profile(int proflen, char *prof, int osclen, char *osc,
1057                              int mdclen, char *mdc)
1058 {
1059         struct lustre_profile *lprof;
1060         int err = 0;
1061
1062         ENTRY;
1063
1064         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
1065
1066         OBD_ALLOC(lprof, sizeof(*lprof));
1067         if (!lprof)
1068                 RETURN(-ENOMEM);
1069         INIT_LIST_HEAD(&lprof->lp_list);
1070
1071         LASSERT(proflen == (strlen(prof) + 1));
1072         OBD_ALLOC(lprof->lp_profile, proflen);
1073         if (!lprof->lp_profile)
1074                 GOTO(out, err = -ENOMEM);
1075         memcpy(lprof->lp_profile, prof, proflen);
1076
1077         LASSERT(osclen == (strlen(osc) + 1));
1078         OBD_ALLOC(lprof->lp_dt, osclen);
1079         if (!lprof->lp_dt)
1080                 GOTO(out, err = -ENOMEM);
1081         memcpy(lprof->lp_dt, osc, osclen);
1082
1083         if (mdclen > 0) {
1084                 LASSERT(mdclen == (strlen(mdc) + 1));
1085                 OBD_ALLOC(lprof->lp_md, mdclen);
1086                 if (!lprof->lp_md)
1087                         GOTO(out, err = -ENOMEM);
1088                 memcpy(lprof->lp_md, mdc, mdclen);
1089         }
1090
1091         spin_lock(&lustre_profile_list_lock);
1092         lprof->lp_refs = 1;
1093         lprof->lp_list_deleted = false;
1094
1095         list_add(&lprof->lp_list, &lustre_profile_list);
1096         spin_unlock(&lustre_profile_list_lock);
1097         RETURN(err);
1098
1099 out:
1100         if (lprof->lp_md)
1101                 OBD_FREE(lprof->lp_md, mdclen);
1102         if (lprof->lp_dt)
1103                 OBD_FREE(lprof->lp_dt, osclen);
1104         if (lprof->lp_profile)
1105                 OBD_FREE(lprof->lp_profile, proflen);
1106         OBD_FREE(lprof, sizeof(*lprof));
1107         RETURN(err);
1108 }
1109
1110 void class_del_profile(const char *prof)
1111 {
1112         struct lustre_profile *lprof;
1113
1114         ENTRY;
1115
1116         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
1117
1118         lprof = class_get_profile(prof);
1119         if (lprof) {
1120                 spin_lock(&lustre_profile_list_lock);
1121                 /* because get profile increments the ref counter */
1122                 lprof->lp_refs--;
1123                 list_del(&lprof->lp_list);
1124                 lprof->lp_list_deleted = true;
1125                 spin_unlock(&lustre_profile_list_lock);
1126
1127                 class_put_profile(lprof);
1128         }
1129         EXIT;
1130 }
1131 EXPORT_SYMBOL(class_del_profile);
1132
1133 void class_put_profile(struct lustre_profile *lprof)
1134 {
1135         spin_lock(&lustre_profile_list_lock);
1136         if ((--lprof->lp_refs) > 0) {
1137                 LASSERT(lprof->lp_refs > 0);
1138                 spin_unlock(&lustre_profile_list_lock);
1139                 return;
1140         }
1141         spin_unlock(&lustre_profile_list_lock);
1142
1143         /* confirm not a negative number */
1144         LASSERT(lprof->lp_refs == 0);
1145
1146         /*
1147          * At least one class_del_profile/profiles must be called
1148          * on the target profile or lustre_profile_list will corrupt
1149          */
1150         LASSERT(lprof->lp_list_deleted);
1151         OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
1152         OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
1153         if (lprof->lp_md)
1154                 OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
1155         OBD_FREE(lprof, sizeof(*lprof));
1156 }
1157 EXPORT_SYMBOL(class_put_profile);
1158
1159 /* COMPAT_146 */
1160 void class_del_profiles(void)
1161 {
1162         struct lustre_profile *lprof, *n;
1163         ENTRY;
1164
1165         spin_lock(&lustre_profile_list_lock);
1166         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
1167                 list_del(&lprof->lp_list);
1168                 lprof->lp_list_deleted = true;
1169                 spin_unlock(&lustre_profile_list_lock);
1170
1171                 class_put_profile(lprof);
1172
1173                 spin_lock(&lustre_profile_list_lock);
1174         }
1175         spin_unlock(&lustre_profile_list_lock);
1176         EXIT;
1177 }
1178 EXPORT_SYMBOL(class_del_profiles);
1179
1180 /*
1181  * We can't call lquota_process_config directly because
1182  * it lives in a module that must be loaded after this one.
1183  */
1184 #ifdef HAVE_SERVER_SUPPORT
1185 static int (*quota_process_config)(struct lustre_cfg *lcfg) = NULL;
1186 #endif /* HAVE_SERVER_SUPPORT */
1187
1188 /**
1189  * Rename the proc parameter in \a cfg with a new name \a new_name.
1190  *
1191  * \param cfg      config structure which contains the proc parameter
1192  * \param new_name new name of the proc parameter
1193  *
1194  * \retval valid-pointer    pointer to the newly-allocated config structure
1195  *                          which contains the renamed proc parameter
1196  * \retval ERR_PTR(-EINVAL) if \a cfg or \a new_name is NULL, or \a cfg does
1197  *                          not contain a proc parameter
1198  * \retval ERR_PTR(-ENOMEM) if memory allocation failure occurs
1199  */
1200 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
1201                                      const char *new_name)
1202 {
1203         struct lustre_cfg_bufs *bufs = NULL;
1204         struct lustre_cfg *new_cfg = NULL;
1205         char *param = NULL;
1206         char *new_param = NULL;
1207         char *value = NULL;
1208         int name_len = 0;
1209         int new_len = 0;
1210
1211         ENTRY;
1212
1213         if (!cfg || !new_name)
1214                 GOTO(out_nocfg, new_cfg = ERR_PTR(-EINVAL));
1215
1216         param = lustre_cfg_string(cfg, 1);
1217         if (!param)
1218                 GOTO(out_nocfg, new_cfg = ERR_PTR(-EINVAL));
1219
1220         value = strchr(param, '=');
1221         if (value)
1222                 name_len = value - param;
1223         else
1224                 name_len = strlen(param);
1225
1226         new_len = LUSTRE_CFG_BUFLEN(cfg, 1) + strlen(new_name) - name_len;
1227
1228         OBD_ALLOC(new_param, new_len);
1229         if (!new_param)
1230                 GOTO(out_nocfg, new_cfg = ERR_PTR(-ENOMEM));
1231
1232         strlcpy(new_param, new_name, new_len);
1233         if (value)
1234                 strcat(new_param, value);
1235
1236         OBD_ALLOC_PTR(bufs);
1237         if (!bufs)
1238                 GOTO(out_free_param, new_cfg = ERR_PTR(-ENOMEM));
1239
1240         lustre_cfg_bufs_reset(bufs, NULL);
1241         lustre_cfg_bufs_init(bufs, cfg);
1242         lustre_cfg_bufs_set_string(bufs, 1, new_param);
1243
1244         OBD_ALLOC(new_cfg, lustre_cfg_len(bufs->lcfg_bufcount,
1245                                           bufs->lcfg_buflen));
1246         if (!new_cfg)
1247                 GOTO(out_free_buf, new_cfg = ERR_PTR(-ENOMEM));
1248
1249         lustre_cfg_init(new_cfg, cfg->lcfg_command, bufs);
1250
1251         new_cfg->lcfg_num = cfg->lcfg_num;
1252         new_cfg->lcfg_flags = cfg->lcfg_flags;
1253         new_cfg->lcfg_nid = cfg->lcfg_nid;
1254         new_cfg->lcfg_nal = cfg->lcfg_nal;
1255 out_free_buf:
1256         OBD_FREE_PTR(bufs);
1257 out_free_param:
1258         OBD_FREE(new_param, new_len);
1259 out_nocfg:
1260         RETURN(new_cfg);
1261 }
1262 EXPORT_SYMBOL(lustre_cfg_rename);
1263
1264 static ssize_t process_param2_config(struct lustre_cfg *lcfg)
1265 {
1266         char *param = lustre_cfg_string(lcfg, 1);
1267         char *upcall = lustre_cfg_string(lcfg, 2);
1268         struct kobject *kobj = NULL;
1269         const char *subsys = param;
1270         char *argv[] = {
1271                 [0] = "/usr/sbin/lctl",
1272                 [1] = "set_param",
1273                 [2] = param,
1274                 [3] = NULL
1275         };
1276         ktime_t start;
1277         ktime_t end;
1278         size_t len;
1279         int rc;
1280
1281         ENTRY;
1282         print_lustre_cfg(lcfg);
1283
1284         len = strcspn(param, ".=");
1285         if (!len)
1286                 return -EINVAL;
1287
1288         /* If we find '=' then its the top level sysfs directory */
1289         if (param[len] == '=')
1290                 return class_set_global(param);
1291
1292         subsys = kstrndup(param, len, GFP_KERNEL);
1293         if (!subsys)
1294                 return -ENOMEM;
1295
1296         kobj = kset_find_obj(lustre_kset, subsys);
1297         kfree(subsys);
1298         if (kobj) {
1299                 char *value = param;
1300                 char *envp[4];
1301                 int i;
1302
1303                 param = strsep(&value, "=");
1304                 envp[0] = kasprintf(GFP_KERNEL, "PARAM=%s", param);
1305                 envp[1] = kasprintf(GFP_KERNEL, "SETTING=%s", value);
1306                 envp[2] = kasprintf(GFP_KERNEL, "TIME=%lld",
1307                                     ktime_get_real_seconds());
1308                 envp[3] = NULL;
1309
1310                 rc = kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
1311                 for (i = 0; i < ARRAY_SIZE(envp); i++)
1312                         kfree(envp[i]);
1313
1314                 kobject_put(kobj);
1315
1316                 RETURN(rc);
1317         }
1318
1319         /* Add upcall processing here. Now only lctl is supported */
1320         if (strcmp(upcall, LCTL_UPCALL) != 0) {
1321                 CERROR("Unsupported upcall %s\n", upcall);
1322                 RETURN(-EINVAL);
1323         }
1324
1325         start = ktime_get();
1326         rc = call_usermodehelper(argv[0], argv, NULL, UMH_WAIT_PROC);
1327         end = ktime_get();
1328
1329         if (rc < 0) {
1330                 CERROR("lctl: error invoking upcall %s %s %s: rc = %d; "
1331                        "time %ldus\n", argv[0], argv[1], argv[2], rc,
1332                        (long)ktime_us_delta(end, start));
1333         } else {
1334                 CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
1335                        argv[0], argv[1], argv[2],
1336                        (long)ktime_us_delta(end, start));
1337                        rc = 0;
1338         }
1339
1340         RETURN(rc);
1341 }
1342
1343 #ifdef HAVE_SERVER_SUPPORT
1344 void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
1345 {
1346         quota_process_config = qpc;
1347 }
1348 EXPORT_SYMBOL(lustre_register_quota_process_config);
1349 #endif /* HAVE_SERVER_SUPPORT */
1350
1351 #define QMT0_DEV_NAME_LEN (LUSTRE_MAXFSNAME + sizeof("-QMT0000"))
1352 static struct obd_device *obd_find_qmt0(char *obd_name)
1353 {
1354         char qmt_name[QMT0_DEV_NAME_LEN];
1355         struct obd_device *qmt = NULL;
1356
1357         if (!server_name2fsname(obd_name, qmt_name, NULL)) {
1358                 strlcat(qmt_name, "-QMT0000", QMT0_DEV_NAME_LEN);
1359                 qmt = class_name2obd(qmt_name);
1360         }
1361
1362         return qmt;
1363 }
1364
1365 /**
1366  * Process configuration commands given in lustre_cfg form.
1367  * These may come from direct calls (e.g. class_manual_cleanup)
1368  * or processing the config llog, or ioctl from lctl.
1369  */
1370 int class_process_config(struct lustre_cfg *lcfg)
1371 {
1372         struct obd_device *obd;
1373         int err;
1374
1375         LASSERT(lcfg && !IS_ERR(lcfg));
1376         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
1377
1378         /* Commands that don't need a device */
1379         switch (lcfg->lcfg_command) {
1380         case LCFG_ATTACH: {
1381                 err = class_attach(lcfg);
1382                 GOTO(out, err);
1383         }
1384         case LCFG_ADD_UUID: {
1385                 CDEBUG(D_IOCTL,
1386                        "adding mapping from uuid %s to nid %#llx (%s)\n",
1387                        lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid,
1388                        libcfs_nid2str(lcfg->lcfg_nid));
1389
1390                 err = class_add_uuid(lustre_cfg_string(lcfg, 1),
1391                                      lcfg->lcfg_nid);
1392                 GOTO(out, err);
1393         }
1394         case LCFG_DEL_UUID: {
1395                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
1396                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) ==
1397                         0) ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
1398
1399                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
1400                 GOTO(out, err);
1401         }
1402         case LCFG_MOUNTOPT: {
1403                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
1404                        lustre_cfg_string(lcfg, 1),
1405                        lustre_cfg_string(lcfg, 2),
1406                        lustre_cfg_string(lcfg, 3));
1407                 /*
1408                  * set these mount options somewhere, so ll_fill_super
1409                  * can find them.
1410                  */
1411                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
1412                                         lustre_cfg_string(lcfg, 1),
1413                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
1414                                         lustre_cfg_string(lcfg, 2),
1415                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
1416                                         lustre_cfg_string(lcfg, 3));
1417                 GOTO(out, err);
1418         }
1419         case LCFG_DEL_MOUNTOPT: {
1420                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
1421                        lustre_cfg_string(lcfg, 1));
1422                 class_del_profile(lustre_cfg_string(lcfg, 1));
1423                 GOTO(out, err = 0);
1424         }
1425         case LCFG_SET_TIMEOUT: {
1426                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
1427                        obd_timeout, lcfg->lcfg_num);
1428                 obd_timeout = max(lcfg->lcfg_num, 1U);
1429                 obd_timeout_set = 1;
1430                 GOTO(out, err = 0);
1431         }
1432         case LCFG_SET_LDLM_TIMEOUT: {
1433                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
1434                        ldlm_timeout, lcfg->lcfg_num);
1435                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
1436                 if (ldlm_timeout >= obd_timeout)
1437                         ldlm_timeout = max(obd_timeout / 3, 1U);
1438                 ldlm_timeout_set = 1;
1439                 GOTO(out, err = 0);
1440         }
1441         case LCFG_SET_UPCALL: {
1442                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
1443                 /* COMPAT_146 Don't fail on old configs */
1444                 GOTO(out, err = 0);
1445         }
1446         case LCFG_MARKER: {
1447                 struct cfg_marker *marker;
1448
1449                 marker = lustre_cfg_buf(lcfg, 1);
1450                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
1451                        marker->cm_flags, marker->cm_tgtname,
1452                        marker->cm_comment);
1453                 GOTO(out, err = 0);
1454         }
1455         case LCFG_PARAM: {
1456                 char *tmp;
1457
1458                 /* llite has no OBD */
1459                 if (class_match_param(lustre_cfg_string(lcfg, 1),
1460                                       PARAM_LLITE, NULL) == 0) {
1461                         struct lustre_sb_info *lsi;
1462                         unsigned long addr;
1463                         ssize_t count;
1464
1465                         /*
1466                          * The instance name contains the sb:
1467                          * lustre-client-aacfe000
1468                          */
1469                         tmp = strrchr(lustre_cfg_string(lcfg, 0), '-');
1470                         if (!tmp || !*(++tmp))
1471                                 GOTO(out, err = -EINVAL);
1472
1473                         if (sscanf(tmp, "%lx", &addr) != 1)
1474                                 GOTO(out, err = -EINVAL);
1475
1476                         lsi = s2lsi((struct super_block *)addr);
1477                         /* This better be a real Lustre superblock! */
1478                         LASSERT(lsi->lsi_lmd->lmd_magic == LMD_MAGIC);
1479
1480                         count = class_modify_config(lcfg, PARAM_LLITE,
1481                                                     lsi->lsi_kobj);
1482                         err = count < 0 ? count : 0;
1483                         GOTO(out, err);
1484                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1485                                               PARAM_SYS, &tmp) == 0)) {
1486                         /* Global param settings */
1487                         err = class_set_global(tmp);
1488                         /*
1489                          * Client or server should not fail to mount if
1490                          * it hits an unknown configuration parameter.
1491                          */
1492                         if (err < 0)
1493                                 CWARN("Ignoring unknown param %s\n", tmp);
1494
1495                         GOTO(out, err = 0);
1496 #ifdef HAVE_SERVER_SUPPORT
1497                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1498                                               PARAM_QUOTA, &tmp) == 0) &&
1499                            quota_process_config) {
1500                         err = (*quota_process_config)(lcfg);
1501                         GOTO(out, err);
1502 #endif /* HAVE_SERVER_SUPPORT */
1503                 }
1504
1505                 break;
1506         }
1507         case LCFG_SET_PARAM: {
1508                 err = process_param2_config(lcfg);
1509                 GOTO(out, err = 0);
1510         }
1511         }
1512         /* Commands that require a device */
1513         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1514         if (!obd) {
1515                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
1516                         CERROR("this lcfg command requires a device name\n");
1517                 else
1518                         CERROR("no device for: %s\n",
1519                                lustre_cfg_string(lcfg, 0));
1520
1521                 GOTO(out, err = -EINVAL);
1522         }
1523         switch(lcfg->lcfg_command) {
1524         case LCFG_SETUP: {
1525                 err = class_setup(obd, lcfg);
1526                 GOTO(out, err);
1527         }
1528         case LCFG_DETACH: {
1529                 err = class_detach(obd, lcfg);
1530                 GOTO(out, err = 0);
1531         }
1532         case LCFG_CLEANUP: {
1533                 err = class_cleanup(obd, lcfg);
1534                 GOTO(out, err = 0);
1535         }
1536         case LCFG_ADD_CONN: {
1537                 err = class_add_conn(obd, lcfg);
1538                 GOTO(out, err = 0);
1539         }
1540         case LCFG_DEL_CONN: {
1541                 err = class_del_conn(obd, lcfg);
1542                 GOTO(out, err = 0);
1543         }
1544         case LCFG_POOL_NEW: {
1545                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
1546                 if (!err && !strcmp(obd->obd_type->typ_name, LUSTRE_LOD_NAME)) {
1547                         obd = obd_find_qmt0(obd->obd_name);
1548                         if (obd)
1549                                 obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
1550                 }
1551                 GOTO(out, err = 0);
1552         }
1553         case LCFG_POOL_ADD: {
1554                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1555                                    lustre_cfg_string(lcfg, 3));
1556                 if (!err && !strcmp(obd->obd_type->typ_name, LUSTRE_LOD_NAME)) {
1557                         obd = obd_find_qmt0(obd->obd_name);
1558                         if (obd)
1559                                 obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1560                                              lustre_cfg_string(lcfg, 3));
1561                 }
1562                 GOTO(out, err = 0);
1563         }
1564         case LCFG_POOL_REM: {
1565                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1566                                    lustre_cfg_string(lcfg, 3));
1567                 if (!err && !strcmp(obd->obd_type->typ_name, LUSTRE_LOD_NAME)) {
1568                         obd = obd_find_qmt0(obd->obd_name);
1569                         if (obd)
1570                                 obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1571                                              lustre_cfg_string(lcfg, 3));
1572                 }
1573                 GOTO(out, err = 0);
1574         }
1575         case LCFG_POOL_DEL: {
1576                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
1577                 if (!err && !strcmp(obd->obd_type->typ_name, LUSTRE_LOD_NAME)) {
1578                         obd = obd_find_qmt0(obd->obd_name);
1579                         if (obd)
1580                                 obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
1581                 }
1582                 GOTO(out, err = 0);
1583         }
1584         /*
1585          * Process config log ADD_MDC record twice to add MDC also to LOV
1586          * for Data-on-MDT:
1587          *
1588          * add 0:lustre-clilmv 1:lustre-MDT0000_UUID 2:0 3:1
1589          *     4:lustre-MDT0000-mdc_UUID
1590          */
1591         case LCFG_ADD_MDC: {
1592                 struct obd_device *lov_obd;
1593                 char *clilmv;
1594
1595                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
1596                 if (err)
1597                         GOTO(out, err);
1598
1599                 /* make sure this is client LMV log entry */
1600                 clilmv = strstr(lustre_cfg_string(lcfg, 0), "clilmv");
1601                 if (!clilmv)
1602                         GOTO(out, err);
1603
1604                 /*
1605                  * replace 'lmv' with 'lov' name to address LOV device and
1606                  * process llog record to add MDC there.
1607                  */
1608                 clilmv[4] = 'o';
1609                 lov_obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1610                 if (lov_obd) {
1611                         err = obd_process_config(lov_obd, sizeof(*lcfg), lcfg);
1612                 } else {
1613                         err = -ENOENT;
1614                         CERROR("%s: Cannot find LOV by %s name, rc = %d\n",
1615                                obd->obd_name, lustre_cfg_string(lcfg, 0), err);
1616                 }
1617                 /* restore 'lmv' name */
1618                 clilmv[4] = 'm';
1619                 GOTO(out, err);
1620         }
1621         default: {
1622                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
1623                 GOTO(out, err);
1624         }
1625         }
1626         EXIT;
1627 out:
1628         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
1629                 CWARN("Ignoring error %d on optional command %#x\n", err,
1630                       lcfg->lcfg_command);
1631                 err = 0;
1632         }
1633         return err;
1634 }
1635 EXPORT_SYMBOL(class_process_config);
1636
1637 ssize_t class_modify_config(struct lustre_cfg *lcfg, const char *prefix,
1638                             struct kobject *kobj)
1639 {
1640         struct kobj_type *typ;
1641         ssize_t count = 0;
1642         int i;
1643
1644         if (lcfg->lcfg_command != LCFG_PARAM) {
1645                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1646                 return -EINVAL;
1647         }
1648
1649         typ = get_ktype(kobj);
1650         if (!typ || !typ->default_attrs)
1651                 return -ENODEV;
1652
1653         print_lustre_cfg(lcfg);
1654
1655         /*
1656          * e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1657          * or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1658          * or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36
1659          */
1660         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1661                 struct attribute *attr;
1662                 size_t keylen;
1663                 char *value;
1664                 char *key;
1665                 int j;
1666
1667                 key = lustre_cfg_buf(lcfg, i);
1668                 /* Strip off prefix */
1669                 if (class_match_param(key, prefix, &key))
1670                         /*
1671                          * If the prefix doesn't match, return error so we
1672                          * can pass it down the stack
1673                          */
1674                         return -EINVAL;
1675
1676                 value = strchr(key, '=');
1677                 if (!value || *(value + 1) == 0) {
1678                         CERROR("%s: can't parse param '%s' (missing '=')\n",
1679                                lustre_cfg_string(lcfg, 0),
1680                                lustre_cfg_string(lcfg, i));
1681                         /* continue parsing other params */
1682                         continue;
1683                 }
1684                 keylen = value - key;
1685                 value++;
1686
1687                 attr = NULL;
1688                 for (j = 0; typ->default_attrs[j]; j++) {
1689                         if (!strncmp(typ->default_attrs[j]->name, key,
1690                                      keylen)) {
1691                                 attr = typ->default_attrs[j];
1692                                 break;
1693                         }
1694                 }
1695
1696                 if (!attr) {
1697                         char *envp[4], *param, *path;
1698
1699                         path = kobject_get_path(kobj, GFP_KERNEL);
1700                         if (!path)
1701                                 return -EINVAL;
1702
1703                         /* convert sysfs path to uevent format */
1704                         param = path;
1705                         while ((param = strchr(param, '/')) != NULL)
1706                                 *param = '.';
1707
1708                         param = strstr(path, "fs.lustre.") + 10;
1709
1710                         envp[0] = kasprintf(GFP_KERNEL, "PARAM=%s.%.*s",
1711                                             param, (int) keylen, key);
1712                         envp[1] = kasprintf(GFP_KERNEL, "SETTING=%s", value);
1713                         envp[2] = kasprintf(GFP_KERNEL, "TIME=%lld",
1714                                             ktime_get_real_seconds());
1715                         envp[3] = NULL;
1716
1717                         if (kobject_uevent_env(kobj, KOBJ_CHANGE, envp)) {
1718                                 CERROR("%s: failed to send uevent %s\n",
1719                                        kobject_name(kobj), key);
1720                         }
1721
1722                         for (i = 0; i < ARRAY_SIZE(envp); i++)
1723                                 kfree(envp[i]);
1724                         kfree(path);
1725                 } else {
1726                         count += lustre_attr_store(kobj, attr, value,
1727                                                    strlen(value));
1728                 }
1729         }
1730         return count;
1731 }
1732 EXPORT_SYMBOL(class_modify_config);
1733
1734 /*
1735  * Supplemental functions for config logs, it allocates lustre_cfg
1736  * buffers plus initialized llog record header at the beginning.
1737  */
1738 struct llog_cfg_rec *lustre_cfg_rec_new(int cmd, struct lustre_cfg_bufs *bufs)
1739 {
1740         struct llog_cfg_rec *lcr;
1741         int reclen;
1742
1743         ENTRY;
1744
1745         reclen = lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen);
1746         reclen = llog_data_len(reclen) + sizeof(struct llog_rec_hdr) +
1747                  sizeof(struct llog_rec_tail);
1748
1749         OBD_ALLOC(lcr, reclen);
1750         if (!lcr)
1751                 RETURN(NULL);
1752
1753         lustre_cfg_init(&lcr->lcr_cfg, cmd, bufs);
1754
1755         lcr->lcr_hdr.lrh_len = reclen;
1756         lcr->lcr_hdr.lrh_type = OBD_CFG_REC;
1757
1758         RETURN(lcr);
1759 }
1760 EXPORT_SYMBOL(lustre_cfg_rec_new);
1761
1762 void lustre_cfg_rec_free(struct llog_cfg_rec *lcr)
1763 {
1764         ENTRY;
1765         OBD_FREE(lcr, lcr->lcr_hdr.lrh_len);
1766         EXIT;
1767 }
1768 EXPORT_SYMBOL(lustre_cfg_rec_free);
1769
1770 /**
1771  * Parse a configuration llog, doing various manipulations on them
1772  * for various reasons, (modifications for compatibility, skip obsolete
1773  * records, change uuids, etc), then class_process_config() resulting
1774  * net records.
1775  */
1776 int class_config_llog_handler(const struct lu_env *env,
1777                               struct llog_handle *handle,
1778                               struct llog_rec_hdr *rec, void *data)
1779 {
1780         struct config_llog_instance *cfg = data;
1781         int cfg_len = rec->lrh_len;
1782         char *cfg_buf = (char *) (rec + 1);
1783         int rc = 0;
1784         ENTRY;
1785
1786         /* class_config_dump_handler(handle, rec, data); */
1787
1788         switch (rec->lrh_type) {
1789         case OBD_CFG_REC: {
1790                 struct lustre_cfg *lcfg, *lcfg_new;
1791                 struct lustre_cfg_bufs bufs;
1792                 char *inst_name = NULL;
1793                 int inst_len = 0;
1794                 int swab = 0;
1795
1796                 lcfg = (struct lustre_cfg *)cfg_buf;
1797                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1798                         lustre_swab_lustre_cfg(lcfg);
1799                         swab = 1;
1800                 }
1801
1802                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1803                 if (rc)
1804                         GOTO(out, rc);
1805
1806                 /* Figure out config state info */
1807                 if (lcfg->lcfg_command == LCFG_MARKER) {
1808                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1809                         lustre_swab_cfg_marker(marker, swab,
1810                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1811                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1812                                cfg->cfg_flags, marker->cm_flags);
1813                         if (marker->cm_flags & CM_START) {
1814                                 /* all previous flags off */
1815                                 cfg->cfg_flags = CFG_F_MARKER;
1816                                 server_name2index(marker->cm_tgtname,
1817                                                   &cfg->cfg_lwp_idx, NULL);
1818                                 if (marker->cm_flags & CM_SKIP) {
1819                                         cfg->cfg_flags |= CFG_F_SKIP;
1820                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1821                                                marker->cm_step);
1822                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1823                                            (cfg->cfg_sb &&
1824                                            lustre_check_exclusion(cfg->cfg_sb,
1825                                                         marker->cm_tgtname))) {
1826                                         cfg->cfg_flags |= CFG_F_EXCLUDE;
1827                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1828                                                marker->cm_step);
1829                                 }
1830                         } else if (marker->cm_flags & CM_END) {
1831                                 cfg->cfg_flags = 0;
1832                         }
1833                 }
1834                 /*
1835                  * A config command without a start marker before it is
1836                  * illegal
1837                  */
1838                 if (!(cfg->cfg_flags & CFG_F_MARKER) &&
1839                     (lcfg->lcfg_command != LCFG_MARKER)) {
1840                         CWARN("Skip config outside markers, (inst: %016lx, uuid: %s, flags: %#x)\n",
1841                                 cfg->cfg_instance,
1842                                 cfg->cfg_uuid.uuid, cfg->cfg_flags);
1843                         cfg->cfg_flags |= CFG_F_SKIP;
1844                 }
1845                 if (cfg->cfg_flags & CFG_F_SKIP) {
1846                         CDEBUG(D_CONFIG, "skipping %#x\n",
1847                                cfg->cfg_flags);
1848                         rc = 0;
1849                         /* No processing! */
1850                         break;
1851                 }
1852
1853                 /*
1854                  * For interoperability between 1.8 and 2.0,
1855                  * rename "mds" OBD device type to "mdt".
1856                  */
1857                 {
1858                         char *typename = lustre_cfg_string(lcfg, 1);
1859                         char *index = lustre_cfg_string(lcfg, 2);
1860
1861                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1862                             strcmp(typename, "mds") == 0)) {
1863                                 CWARN("For 1.8 interoperability, rename obd "
1864                                         "type from mds to mdt\n");
1865                                 typename[2] = 't';
1866                         }
1867                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1868                             strcmp(index, "type") == 0)) {
1869                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1870                                        "set this index to '0'\n");
1871                                 index[0] = '0';
1872                                 index[1] = 0;
1873                         }
1874                 }
1875
1876 #ifdef HAVE_SERVER_SUPPORT
1877                 /* newer MDS replaces LOV/OSC with LOD/OSP */
1878                 if ((lcfg->lcfg_command == LCFG_ATTACH ||
1879                      lcfg->lcfg_command == LCFG_SET_PARAM ||
1880                      lcfg->lcfg_command == LCFG_PARAM) &&
1881                     cfg->cfg_sb && IS_MDT(s2lsi(cfg->cfg_sb))) {
1882                         char *typename = lustre_cfg_string(lcfg, 1);
1883
1884                         if (typename &&
1885                             strcmp(typename, LUSTRE_LOV_NAME) == 0) {
1886                                 CDEBUG(D_CONFIG,
1887                                        "For 2.x interoperability, rename obd "
1888                                        "type from lov to lod (%s)\n",
1889                                        s2lsi(cfg->cfg_sb)->lsi_svname);
1890                                 strcpy(typename, LUSTRE_LOD_NAME);
1891                         }
1892                         if (typename &&
1893                             strcmp(typename, LUSTRE_OSC_NAME) == 0) {
1894                                 CDEBUG(D_CONFIG,
1895                                        "For 2.x interoperability, rename obd "
1896                                        "type from osc to osp (%s)\n",
1897                                        s2lsi(cfg->cfg_sb)->lsi_svname);
1898                                 strcpy(typename, LUSTRE_OSP_NAME);
1899                         }
1900                 }
1901 #endif /* HAVE_SERVER_SUPPORT */
1902
1903                 if (cfg->cfg_flags & CFG_F_EXCLUDE) {
1904                         CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
1905                                lcfg->lcfg_command);
1906                         if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
1907                                 /* Add inactive instead */
1908                                 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1909                 }
1910
1911                 lustre_cfg_bufs_reset(&bufs, NULL);
1912                 lustre_cfg_bufs_init(&bufs, lcfg);
1913
1914                 if (cfg->cfg_instance &&
1915                     lcfg->lcfg_command != LCFG_SPTLRPC_CONF &&
1916                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0) {
1917                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1918                                 LUSTRE_MAXINSTANCE + 4;
1919                         OBD_ALLOC(inst_name, inst_len);
1920                         if (!inst_name)
1921                                 GOTO(out, rc = -ENOMEM);
1922                         snprintf(inst_name, inst_len, "%s-%016lx",
1923                                 lustre_cfg_string(lcfg, 0),
1924                                 cfg->cfg_instance);
1925                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1926                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1927                                lcfg->lcfg_command, inst_name);
1928                 }
1929
1930                 /* override llog UUID for clients, to insure they are unique */
1931                 if (cfg->cfg_instance && lcfg->lcfg_command == LCFG_ATTACH)
1932                         lustre_cfg_bufs_set_string(&bufs, 2,
1933                                                    cfg->cfg_uuid.uuid);
1934                 /*
1935                  * sptlrpc config record, we expect 2 data segments:
1936                  *  [0]: fs_name/target_name,
1937                  *  [1]: rule string
1938                  * moving them to index [1] and [2], and insert MGC's
1939                  * obdname at index [0].
1940                  */
1941                 if (cfg->cfg_instance &&
1942                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1943                         /* After ASLR changes cfg_instance this needs fixing */
1944                         /* "obd" is set in config_log_find_or_add() */
1945                         struct obd_device *obd = (void *)cfg->cfg_instance;
1946
1947                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1948                                             bufs.lcfg_buflen[1]);
1949                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1950                                             bufs.lcfg_buflen[0]);
1951                         lustre_cfg_bufs_set_string(&bufs, 0,
1952                                                    obd->obd_name);
1953                 }
1954
1955                 /*
1956                  * Add net info to setup command
1957                  * if given on command line.
1958                  * So config log will be:
1959                  * [0]: client name
1960                  * [1]: client UUID
1961                  * [2]: server UUID
1962                  * [3]: inactive-on-startup
1963                  * [4]: restrictive net
1964                  */
1965                 if (cfg && cfg->cfg_sb && s2lsi(cfg->cfg_sb) &&
1966                     !IS_SERVER(s2lsi(cfg->cfg_sb))) {
1967                         struct lustre_sb_info *lsi = s2lsi(cfg->cfg_sb);
1968                         char *nidnet = lsi->lsi_lmd->lmd_nidnet;
1969
1970                         if (lcfg->lcfg_command == LCFG_SETUP &&
1971                             lcfg->lcfg_bufcount != 2 && nidnet) {
1972                                 CDEBUG(D_CONFIG, "Adding net %s info to setup "
1973                                        "command for client %s\n", nidnet,
1974                                        lustre_cfg_string(lcfg, 0));
1975                                 lustre_cfg_bufs_set_string(&bufs, 4, nidnet);
1976                         }
1977                 }
1978
1979                 /*
1980                  * Skip add_conn command if uuid is
1981                  * not on restricted net
1982                  */
1983                 if (cfg && cfg->cfg_sb && s2lsi(cfg->cfg_sb) &&
1984                     !IS_SERVER(s2lsi(cfg->cfg_sb))) {
1985                         struct lustre_sb_info *lsi = s2lsi(cfg->cfg_sb);
1986                         char *uuid_str = lustre_cfg_string(lcfg, 1);
1987
1988                         if (lcfg->lcfg_command == LCFG_ADD_CONN &&
1989                             lsi->lsi_lmd->lmd_nidnet &&
1990                             LNET_NIDNET(libcfs_str2nid(uuid_str)) !=
1991                             libcfs_str2net(lsi->lsi_lmd->lmd_nidnet)) {
1992                                 CDEBUG(D_CONFIG, "skipping add_conn for %s\n",
1993                                        uuid_str);
1994                                 rc = 0;
1995                                 /* No processing! */
1996                                 break;
1997                         }
1998                 }
1999
2000                 OBD_ALLOC(lcfg_new, lustre_cfg_len(bufs.lcfg_bufcount,
2001                                                    bufs.lcfg_buflen));
2002                 if (!lcfg_new)
2003                         GOTO(out, rc = -ENOMEM);
2004
2005                 lustre_cfg_init(lcfg_new, lcfg->lcfg_command, &bufs);
2006                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
2007                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
2008
2009                 /*
2010                  * XXX Hack to try to remain binary compatible with
2011                  * pre-newconfig logs
2012                  */
2013                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
2014                     (lcfg->lcfg_nid >> 32) == 0) {
2015                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
2016
2017                         lcfg_new->lcfg_nid =
2018                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
2019                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
2020                               lcfg->lcfg_nal, addr,
2021                               libcfs_nid2str(lcfg_new->lcfg_nid));
2022                 } else {
2023                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
2024                 }
2025
2026                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
2027
2028                 rc = class_process_config(lcfg_new);
2029                 OBD_FREE(lcfg_new, lustre_cfg_len(lcfg_new->lcfg_bufcount,
2030                                                   lcfg_new->lcfg_buflens));
2031                 if (inst_name)
2032                         OBD_FREE(inst_name, inst_len);
2033                 break;
2034         }
2035         default:
2036                 CERROR("Unknown llog record type %#x encountered\n",
2037                        rec->lrh_type);
2038                 break;
2039         }
2040 out:
2041         if (rc) {
2042                 CERROR("%s: cfg command failed: rc = %d\n",
2043                         handle->lgh_ctxt->loc_obd->obd_name, rc);
2044                 class_config_dump_handler(NULL, handle, rec, data);
2045         }
2046         RETURN(rc);
2047 }
2048 EXPORT_SYMBOL(class_config_llog_handler);
2049
2050 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
2051                             char *name, struct config_llog_instance *cfg)
2052 {
2053         struct llog_process_cat_data cd = {
2054                 .lpcd_first_idx = 0,
2055         };
2056         struct llog_handle *llh;
2057         llog_cb_t callback;
2058         int rc;
2059         ENTRY;
2060
2061         CDEBUG(D_INFO, "looking up llog %s\n", name);
2062         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
2063         if (rc)
2064                 RETURN(rc);
2065
2066         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
2067         if (rc)
2068                 GOTO(parse_out, rc);
2069
2070         /* continue processing from where we last stopped to end-of-log */
2071         if (cfg) {
2072                 cd.lpcd_first_idx = cfg->cfg_last_idx;
2073                 callback = cfg->cfg_callback;
2074                 LASSERT(callback != NULL);
2075         } else {
2076                 callback = class_config_llog_handler;
2077         }
2078
2079         cd.lpcd_last_idx = 0;
2080
2081         rc = llog_process(env, llh, callback, cfg, &cd);
2082
2083         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
2084                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
2085         if (cfg)
2086                 cfg->cfg_last_idx = cd.lpcd_last_idx;
2087
2088 parse_out:
2089         llog_close(env, llh);
2090         RETURN(rc);
2091 }
2092 EXPORT_SYMBOL(class_config_parse_llog);
2093
2094 /**
2095  * Parse config record and output dump in supplied buffer.
2096  *
2097  * This is separated from class_config_dump_handler() to use
2098  * for ioctl needs as well
2099  *
2100  * Sample Output:
2101  * - { index: 4, event: attach, device: lustrewt-clilov, type: lov,
2102  *     UUID: lustrewt-clilov_UUID }
2103  */
2104 int class_config_yaml_output(struct llog_rec_hdr *rec, char *buf, int size)
2105 {
2106         struct lustre_cfg *lcfg = (struct lustre_cfg *)(rec + 1);
2107         char *ptr = buf;
2108         char *end = buf + size;
2109         int rc = 0, i;
2110         struct lcfg_type_data *ldata;
2111
2112         LASSERT(rec->lrh_type == OBD_CFG_REC);
2113         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
2114         if (rc < 0)
2115                 return rc;
2116
2117         ldata = lcfg_cmd2data(lcfg->lcfg_command);
2118         if (!ldata)
2119                 return -ENOTTY;
2120
2121         if (lcfg->lcfg_command == LCFG_MARKER)
2122                 return 0;
2123
2124         /* form YAML entity */
2125         ptr += snprintf(ptr, end - ptr, "- { index: %u, event: %s",
2126                         rec->lrh_index, ldata->ltd_name);
2127         if (end - ptr <= 0)
2128                 goto out_overflow;
2129
2130         if (lcfg->lcfg_flags) {
2131                 ptr += snprintf(ptr, end - ptr, ", flags: %#08x",
2132                                 lcfg->lcfg_flags);
2133                 if (end - ptr <= 0)
2134                         goto out_overflow;
2135         }
2136         if (lcfg->lcfg_num) {
2137                 ptr += snprintf(ptr, end - ptr, ", num: %#08x",
2138                                 lcfg->lcfg_num);
2139                 if (end - ptr <= 0)
2140                         goto out_overflow;
2141         }
2142         if (lcfg->lcfg_nid) {
2143                 char nidstr[LNET_NIDSTR_SIZE];
2144
2145                 libcfs_nid2str_r(lcfg->lcfg_nid, nidstr, sizeof(nidstr));
2146                 ptr += snprintf(ptr, end - ptr, ", nid: %s(%#llx)",
2147                                 nidstr, lcfg->lcfg_nid);
2148                 if (end - ptr <= 0)
2149                         goto out_overflow;
2150         }
2151
2152         if (LUSTRE_CFG_BUFLEN(lcfg, 0) > 0) {
2153                 ptr += snprintf(ptr, end - ptr, ", device: %s",
2154                                 lustre_cfg_string(lcfg, 0));
2155                 if (end - ptr <= 0)
2156                         goto out_overflow;
2157         }
2158
2159         if (lcfg->lcfg_command == LCFG_SET_PARAM) {
2160                 /*
2161                  * set_param -P parameters have param=val here, separate
2162                  * them through pointer magic and print them out in
2163                  * native yamlese
2164                  */
2165                 char *cfg_str = lustre_cfg_string(lcfg, 1);
2166                 char *tmp = strchr(cfg_str, '=');
2167                 size_t len;
2168
2169                 if (!tmp)
2170                         goto out_done;
2171
2172                 ptr += snprintf(ptr, end - ptr, ", %s: ", ldata->ltd_bufs[0]);
2173                 len = tmp - cfg_str + 1;
2174                 snprintf(ptr, len, "%s", cfg_str);
2175                 ptr += len - 1;
2176
2177                 ptr += snprintf(ptr, end - ptr, ", %s: ", ldata->ltd_bufs[1]);
2178                 ptr += snprintf(ptr, end - ptr, "%s", tmp + 1);
2179
2180                 goto out_done;
2181         }
2182
2183         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
2184                 if (LUSTRE_CFG_BUFLEN(lcfg, i) > 0) {
2185                         ptr += snprintf(ptr, end - ptr, ", %s: %s",
2186                                         ldata->ltd_bufs[i - 1],
2187                                         lustre_cfg_string(lcfg, i));
2188                         if (end - ptr <= 0)
2189                                 goto out_overflow;
2190                 }
2191         }
2192
2193 out_done:
2194         ptr += snprintf(ptr, end - ptr, " }\n");
2195 out_overflow:
2196         /* Return consumed bytes.  If the buffer overflowed, zero last byte */
2197         rc = ptr - buf;
2198         if (rc > size) {
2199                 rc = -EOVERFLOW;
2200                 *(end - 1) = '\0';
2201         }
2202
2203         return rc;
2204 }
2205
2206 /**
2207  * parse config record and output dump in supplied buffer.
2208  * This is separated from class_config_dump_handler() to use
2209  * for ioctl needs as well
2210  */
2211 static int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
2212 {
2213         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
2214         char                    *ptr = buf;
2215         char                    *end = buf + size;
2216         int                      rc = 0;
2217
2218         ENTRY;
2219
2220         LASSERT(rec->lrh_type == OBD_CFG_REC);
2221         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
2222         if (rc < 0)
2223                 RETURN(rc);
2224
2225         ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
2226         if (lcfg->lcfg_flags)
2227                 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
2228                                 lcfg->lcfg_flags);
2229
2230         if (lcfg->lcfg_num)
2231                 ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
2232
2233         if (lcfg->lcfg_nid) {
2234                 char nidstr[LNET_NIDSTR_SIZE];
2235
2236                 libcfs_nid2str_r(lcfg->lcfg_nid, nidstr, sizeof(nidstr));
2237                 ptr += snprintf(ptr, end-ptr, "nid=%s(%#llx)    ",
2238                                 nidstr, lcfg->lcfg_nid);
2239         }
2240
2241         if (lcfg->lcfg_command == LCFG_MARKER) {
2242                 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
2243
2244                 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
2245                                 marker->cm_step, marker->cm_flags,
2246                                 marker->cm_tgtname, marker->cm_comment);
2247         } else {
2248                 int i;
2249
2250                 for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
2251                         ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
2252                                         lustre_cfg_string(lcfg, i));
2253                 }
2254         }
2255         ptr += snprintf(ptr, end - ptr, "\n");
2256         /* return consumed bytes */
2257         rc = ptr - buf;
2258         RETURN(rc);
2259 }
2260
2261 int class_config_dump_handler(const struct lu_env *env,
2262                               struct llog_handle *handle,
2263                               struct llog_rec_hdr *rec, void *data)
2264 {
2265         char *outstr;
2266         int rc = 0;
2267
2268         ENTRY;
2269
2270         OBD_ALLOC(outstr, 256);
2271         if (!outstr)
2272                 RETURN(-ENOMEM);
2273
2274         if (rec->lrh_type == OBD_CFG_REC) {
2275                 class_config_parse_rec(rec, outstr, 256);
2276                 LCONSOLE(D_WARNING, "   %s\n", outstr);
2277         } else {
2278                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
2279                 rc = -EINVAL;
2280         }
2281
2282         OBD_FREE(outstr, 256);
2283         RETURN(rc);
2284 }
2285
2286 /**
2287  * Call class_cleanup and class_detach.
2288  * "Manual" only in the sense that we're faking lcfg commands.
2289  */
2290 int class_manual_cleanup(struct obd_device *obd)
2291 {
2292         char flags[3] = "";
2293         struct lustre_cfg *lcfg;
2294         struct lustre_cfg_bufs bufs;
2295         int rc;
2296
2297         ENTRY;
2298
2299         if (!obd) {
2300                 CERROR("empty cleanup\n");
2301                 RETURN(-EALREADY);
2302         }
2303
2304         if (obd->obd_force)
2305                 strlcat(flags, "F", sizeof(flags));
2306         if (obd->obd_fail)
2307                 strlcat(flags, "A", sizeof(flags));
2308
2309         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
2310                obd->obd_name, flags);
2311
2312         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
2313         lustre_cfg_bufs_set_string(&bufs, 1, flags);
2314         OBD_ALLOC(lcfg, lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
2315         if (!lcfg)
2316                 RETURN(-ENOMEM);
2317         lustre_cfg_init(lcfg, LCFG_CLEANUP, &bufs);
2318
2319         rc = class_process_config(lcfg);
2320         if (rc) {
2321                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
2322                 GOTO(out, rc);
2323         }
2324
2325         /* the lcfg is almost the same for both ops */
2326         lcfg->lcfg_command = LCFG_DETACH;
2327         rc = class_process_config(lcfg);
2328         if (rc)
2329                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
2330 out:
2331         OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
2332         RETURN(rc);
2333 }
2334 EXPORT_SYMBOL(class_manual_cleanup);
2335
2336 #ifdef HAVE_SERVER_SUPPORT
2337 /*
2338  * nid<->nidstats hash operations
2339  */
2340 static unsigned
2341 nidstats_hash(struct cfs_hash *hs, const void *key, unsigned int mask)
2342 {
2343         return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
2344 }
2345
2346 static void *
2347 nidstats_key(struct hlist_node *hnode)
2348 {
2349         struct nid_stat *ns;
2350
2351         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2352
2353         return &ns->nid;
2354 }
2355
2356 static int
2357 nidstats_keycmp(const void *key, struct hlist_node *hnode)
2358 {
2359         return *(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key;
2360 }
2361
2362 static void *
2363 nidstats_object(struct hlist_node *hnode)
2364 {
2365         return hlist_entry(hnode, struct nid_stat, nid_hash);
2366 }
2367
2368 static void
2369 nidstats_get(struct cfs_hash *hs, struct hlist_node *hnode)
2370 {
2371         struct nid_stat *ns;
2372
2373         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2374         nidstat_getref(ns);
2375 }
2376
2377 static void
2378 nidstats_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2379 {
2380         struct nid_stat *ns;
2381
2382         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
2383         nidstat_putref(ns);
2384 }
2385
2386 static struct cfs_hash_ops nid_stat_hash_ops = {
2387         .hs_hash        = nidstats_hash,
2388         .hs_key         = nidstats_key,
2389         .hs_keycmp      = nidstats_keycmp,
2390         .hs_object      = nidstats_object,
2391         .hs_get         = nidstats_get,
2392         .hs_put_locked  = nidstats_put_locked,
2393 };
2394
2395
2396 /*
2397  * client_generation<->export hash operations
2398  */
2399
2400 static unsigned
2401 gen_hash(struct cfs_hash *hs, const void *key, unsigned mask)
2402 {
2403         return cfs_hash_djb2_hash(key, sizeof(__u32), mask);
2404 }
2405
2406 static void *
2407 gen_key(struct hlist_node *hnode)
2408 {
2409         struct obd_export *exp;
2410
2411         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2412
2413         RETURN(&exp->exp_target_data.ted_lcd->lcd_generation);
2414 }
2415
2416 /*
2417  * NOTE: It is impossible to find an export that is in failed
2418  *       state with this function
2419  */
2420 static int
2421 gen_kepcmp(const void *key, struct hlist_node *hnode)
2422 {
2423         struct obd_export *exp;
2424
2425         LASSERT(key);
2426         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2427
2428         RETURN(exp->exp_target_data.ted_lcd->lcd_generation == *(__u32 *)key &&
2429                !exp->exp_failed);
2430 }
2431
2432 static void *
2433 gen_export_object(struct hlist_node *hnode)
2434 {
2435         return hlist_entry(hnode, struct obd_export, exp_gen_hash);
2436 }
2437
2438 static void
2439 gen_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
2440 {
2441         struct obd_export *exp;
2442
2443         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2444         class_export_get(exp);
2445 }
2446
2447 static void
2448 gen_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
2449 {
2450         struct obd_export *exp;
2451
2452         exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
2453         class_export_put(exp);
2454 }
2455
2456 static struct cfs_hash_ops gen_hash_ops = {
2457         .hs_hash        = gen_hash,
2458         .hs_key         = gen_key,
2459         .hs_keycmp      = gen_kepcmp,
2460         .hs_object      = gen_export_object,
2461         .hs_get         = gen_export_get,
2462         .hs_put_locked  = gen_export_put_locked,
2463 };
2464
2465 #endif /* HAVE_SERVER_SUPPORT */