kernel/drivers/staging/lustre/lustre/obdclass/obd_config.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/obdclass/obd_config.c
  37  *
  38  * Config API
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_CLASS
  42 #include "../include/obd_class.h"
  43 #include <linux/string.h>
  44 #include "../include/lustre_log.h"
  45 #include "../include/lprocfs_status.h"
  46 #include "../include/lustre_param.h"
  47
  48 #include "llog_internal.h"
  49
  50 static struct cfs_hash_ops uuid_hash_ops;
  51
  52 /*********** string parsing utils *********/
  53
  54 /* returns 0 if we find this key in the buffer, else 1 */
  55 int class_find_param(char *buf, char *key, char **valp)
  56 {
  57         char *ptr;
  58
  59         if (!buf)
  60                 return 1;
  61
  62         ptr = strstr(buf, key);
  63         if (!ptr)
  64                 return 1;
  65
  66         if (valp)
  67                 *valp = ptr + strlen(key);
  68
  69         return 0;
  70 }
  71 EXPORT_SYMBOL(class_find_param);
  72
  73 /* returns 0 if this is the first key in the buffer, else 1.
  74    valp points to first char after key. */
  75 static int class_match_param(char *buf, char *key, char **valp)
  76 {
  77         if (!buf)
  78                 return 1;
  79
  80         if (memcmp(buf, key, strlen(key)) != 0)
  81                 return 1;
  82
  83         if (valp)
  84                 *valp = buf + strlen(key);
  85
  86         return 0;
  87 }
  88
  89 static int parse_nid(char *buf, void *value, int quiet)
  90 {
  91         lnet_nid_t *nid = value;
  92
  93         *nid = libcfs_str2nid(buf);
  94         if (*nid != LNET_NID_ANY)
  95                 return 0;
  96
  97         if (!quiet)
  98                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
  99         return -EINVAL;
 100 }
 101
 102 static int parse_net(char *buf, void *value)
 103 {
 104         __u32 *net = value;
 105
 106         *net = libcfs_str2net(buf);
 107         CDEBUG(D_INFO, "Net %s\n", libcfs_net2str(*net));
 108         return 0;
 109 }
 110
 111 enum {
 112         CLASS_PARSE_NID = 1,
 113         CLASS_PARSE_NET,
 114 };
 115
 116 /* 0 is good nid,
 117    1 not found
 118    < 0 error
 119    endh is set to next separator */
 120 static int class_parse_value(char *buf, int opc, void *value, char **endh,
 121                              int quiet)
 122 {
 123         char *endp;
 124         char  tmp;
 125         int   rc = 0;
 126
 127         if (!buf)
 128                 return 1;
 129         while (*buf == ',' || *buf == ':')
 130                 buf++;
 131         if (*buf == ' ' || *buf == '/' || *buf == '\0')
 132                 return 1;
 133
 134         /* nid separators or end of nids */
 135         endp = strpbrk(buf, ",: /");
 136         if (!endp)
 137                 endp = buf + strlen(buf);
 138
 139         tmp = *endp;
 140         *endp = '\0';
 141         switch (opc) {
 142         default:
 143                 LBUG();
 144         case CLASS_PARSE_NID:
 145                 rc = parse_nid(buf, value, quiet);
 146                 break;
 147         case CLASS_PARSE_NET:
 148                 rc = parse_net(buf, value);
 149                 break;
 150         }
 151         *endp = tmp;
 152         if (rc != 0)
 153                 return rc;
 154         if (endh)
 155                 *endh = endp;
 156         return 0;
 157 }
 158
 159 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
 160 {
 161         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 0);
 162 }
 163 EXPORT_SYMBOL(class_parse_nid);
 164
 165 int class_parse_nid_quiet(char *buf, lnet_nid_t *nid, char **endh)
 166 {
 167         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 1);
 168 }
 169 EXPORT_SYMBOL(class_parse_nid_quiet);
 170
 171 /********************** class fns **********************/
 172
 173 /**
 174  * Create a new obd device and set the type, name and uuid.  If successful,
 175  * the new device can be accessed by either name or uuid.
 176  */
 177 static int class_attach(struct lustre_cfg *lcfg)
 178 {
 179         struct obd_device *obd = NULL;
 180         char *typename, *name, *uuid;
 181         int rc, len;
 182
 183         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 184                 CERROR("No type passed!\n");
 185                 return -EINVAL;
 186         }
 187         typename = lustre_cfg_string(lcfg, 1);
 188
 189         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
 190                 CERROR("No name passed!\n");
 191                 return -EINVAL;
 192         }
 193         name = lustre_cfg_string(lcfg, 0);
 194
 195         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
 196                 CERROR("No UUID passed!\n");
 197                 return -EINVAL;
 198         }
 199         uuid = lustre_cfg_string(lcfg, 2);
 200
 201         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 202                MKSTR(typename), MKSTR(name), MKSTR(uuid));
 203
 204         obd = class_newdev(typename, name);
 205         if (IS_ERR(obd)) {
 206                 /* Already exists or out of obds */
 207                 rc = PTR_ERR(obd);
 208                 obd = NULL;
 209                 CERROR("Cannot create device %s of type %s : %d\n",
 210                        name, typename, rc);
 211                 goto out;
 212         }
 213         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
 214                  name, typename);
 215         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 216                  "obd %p obd_magic %08X != %08X\n",
 217                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 218         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
 219                  "%p obd_name %s != %s\n", obd, obd->obd_name, name);
 220
 221         rwlock_init(&obd->obd_pool_lock);
 222         obd->obd_pool_limit = 0;
 223         obd->obd_pool_slv = 0;
 224
 225         INIT_LIST_HEAD(&obd->obd_exports);
 226         INIT_LIST_HEAD(&obd->obd_unlinked_exports);
 227         INIT_LIST_HEAD(&obd->obd_delayed_exports);
 228         spin_lock_init(&obd->obd_nid_lock);
 229         spin_lock_init(&obd->obd_dev_lock);
 230         mutex_init(&obd->obd_dev_mutex);
 231         spin_lock_init(&obd->obd_osfs_lock);
 232         /* obd->obd_osfs_age must be set to a value in the distant
 233          * past to guarantee a fresh statfs is fetched on mount. */
 234         obd->obd_osfs_age = cfs_time_shift_64(-1000);
 235
 236         /* XXX belongs in setup not attach  */
 237         init_rwsem(&obd->obd_observer_link_sem);
 238         /* recovery data */
 239         init_waitqueue_head(&obd->obd_evict_inprogress_waitq);
 240
 241         llog_group_init(&obd->obd_olg, FID_SEQ_LLOG);
 242
 243         obd->obd_conn_inprogress = 0;
 244
 245         len = strlen(uuid);
 246         if (len >= sizeof(obd->obd_uuid)) {
 247                 CERROR("uuid must be < %d bytes long\n",
 248                        (int)sizeof(obd->obd_uuid));
 249                 rc = -EINVAL;
 250                 goto out;
 251         }
 252         memcpy(obd->obd_uuid.uuid, uuid, len);
 253
 254         /* do the attach */
 255         if (OBP(obd, attach)) {
 256                 rc = OBP(obd, attach)(obd, sizeof(*lcfg), lcfg);
 257                 if (rc) {
 258                         rc = -EINVAL;
 259                         goto out;
 260                 }
 261         }
 262
 263         /* Detach drops this */
 264         spin_lock(&obd->obd_dev_lock);
 265         atomic_set(&obd->obd_refcount, 1);
 266         spin_unlock(&obd->obd_dev_lock);
 267         lu_ref_init(&obd->obd_reference);
 268         lu_ref_add(&obd->obd_reference, "attach", obd);
 269
 270         obd->obd_attached = 1;
 271         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 272                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 273         return 0;
 274  out:
 275         if (obd != NULL) {
 276                 class_release_dev(obd);
 277         }
 278         return rc;
 279 }
 280
 281 /** Create hashes, self-export, and call type-specific setup.
 282  * Setup is effectively the "start this obd" call.
 283  */
 284 static int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 285 {
 286         int err = 0;
 287         struct obd_export *exp;
 288
 289         LASSERT(obd != NULL);
 290         LASSERTF(obd == class_num2obd(obd->obd_minor),
 291                  "obd %p != obd_devs[%d] %p\n",
 292                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 293         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 294                  "obd %p obd_magic %08x != %08x\n",
 295                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 296
 297         /* have we attached a type to this device? */
 298         if (!obd->obd_attached) {
 299                 CERROR("Device %d not attached\n", obd->obd_minor);
 300                 return -ENODEV;
 301         }
 302
 303         if (obd->obd_set_up) {
 304                 CERROR("Device %d already setup (type %s)\n",
 305                        obd->obd_minor, obd->obd_type->typ_name);
 306                 return -EEXIST;
 307         }
 308
 309         /* is someone else setting us up right now? (attach inits spinlock) */
 310         spin_lock(&obd->obd_dev_lock);
 311         if (obd->obd_starting) {
 312                 spin_unlock(&obd->obd_dev_lock);
 313                 CERROR("Device %d setup in progress (type %s)\n",
 314                        obd->obd_minor, obd->obd_type->typ_name);
 315                 return -EEXIST;
 316         }
 317         /* just leave this on forever.  I can't use obd_set_up here because
 318            other fns check that status, and we're not actually set up yet. */
 319         obd->obd_starting = 1;
 320         obd->obd_uuid_hash = NULL;
 321         spin_unlock(&obd->obd_dev_lock);
 322
 323         /* create an uuid-export lustre hash */
 324         obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
 325                                              HASH_UUID_CUR_BITS,
 326                                              HASH_UUID_MAX_BITS,
 327                                              HASH_UUID_BKT_BITS, 0,
 328                                              CFS_HASH_MIN_THETA,
 329                                              CFS_HASH_MAX_THETA,
 330                                              &uuid_hash_ops, CFS_HASH_DEFAULT);
 331         if (!obd->obd_uuid_hash) {
 332                 err = -ENOMEM;
 333                 goto err_hash;
 334         }
 335
 336         exp = class_new_export(obd, &obd->obd_uuid);
 337         if (IS_ERR(exp)) {
 338                 err = PTR_ERR(exp);
 339                 goto err_hash;
 340         }
 341
 342         obd->obd_self_export = exp;
 343         class_export_put(exp);
 344
 345         err = obd_setup(obd, lcfg);
 346         if (err)
 347                 goto err_exp;
 348
 349         obd->obd_set_up = 1;
 350
 351         spin_lock(&obd->obd_dev_lock);
 352         /* cleanup drops this */
 353         class_incref(obd, "setup", obd);
 354         spin_unlock(&obd->obd_dev_lock);
 355
 356         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 357                obd->obd_name, obd->obd_uuid.uuid);
 358
 359         return 0;
 360 err_exp:
 361         if (obd->obd_self_export) {
 362                 class_unlink_export(obd->obd_self_export);
 363                 obd->obd_self_export = NULL;
 364         }
 365 err_hash:
 366         if (obd->obd_uuid_hash) {
 367                 cfs_hash_putref(obd->obd_uuid_hash);
 368                 obd->obd_uuid_hash = NULL;
 369         }
 370         obd->obd_starting = 0;
 371         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 372         return err;
 373 }
 374
 375 /** We have finished using this obd and are ready to destroy it.
 376  * There can be no more references to this obd.
 377  */
 378 static int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 379 {
 380         if (obd->obd_set_up) {
 381                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 382                 return -EBUSY;
 383         }
 384
 385         spin_lock(&obd->obd_dev_lock);
 386         if (!obd->obd_attached) {
 387                 spin_unlock(&obd->obd_dev_lock);
 388                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 389                 return -ENODEV;
 390         }
 391         obd->obd_attached = 0;
 392         spin_unlock(&obd->obd_dev_lock);
 393
 394         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 395                obd->obd_name, obd->obd_uuid.uuid);
 396
 397         class_decref(obd, "attach", obd);
 398         return 0;
 399 }
 400
 401 /** Start shutting down the obd.  There may be in-progress ops when
 402  * this is called.  We tell them to start shutting down with a call
 403  * to class_disconnect_exports().
 404  */
 405 static int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 406 {
 407         int err = 0;
 408         char *flag;
 409
 410         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 411
 412         if (!obd->obd_set_up) {
 413                 CERROR("Device %d not setup\n", obd->obd_minor);
 414                 return -ENODEV;
 415         }
 416
 417         spin_lock(&obd->obd_dev_lock);
 418         if (obd->obd_stopping) {
 419                 spin_unlock(&obd->obd_dev_lock);
 420                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 421                 return -ENODEV;
 422         }
 423         /* Leave this on forever */
 424         obd->obd_stopping = 1;
 425
 426         /* wait for already-arrived-connections to finish. */
 427         while (obd->obd_conn_inprogress > 0) {
 428                 spin_unlock(&obd->obd_dev_lock);
 429
 430                 cond_resched();
 431
 432                 spin_lock(&obd->obd_dev_lock);
 433         }
 434         spin_unlock(&obd->obd_dev_lock);
 435
 436         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 437                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 438                         switch (*flag) {
 439                         case 'F':
 440                                 obd->obd_force = 1;
 441                                 break;
 442                         case 'A':
 443                                 LCONSOLE_WARN("Failing over %s\n",
 444                                               obd->obd_name);
 445                                 obd->obd_fail = 1;
 446                                 obd->obd_no_transno = 1;
 447                                 obd->obd_no_recov = 1;
 448                                 if (OBP(obd, iocontrol)) {
 449                                         obd_iocontrol(OBD_IOC_SYNC,
 450                                                       obd->obd_self_export,
 451                                                       0, NULL, NULL);
 452                                 }
 453                                 break;
 454                         default:
 455                                 CERROR("Unrecognised flag '%c'\n", *flag);
 456                         }
 457         }
 458
 459         LASSERT(obd->obd_self_export);
 460
 461         /* Precleanup, we must make sure all exports get destroyed. */
 462         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 463         if (err)
 464                 CERROR("Precleanup %s returned %d\n",
 465                        obd->obd_name, err);
 466
 467         /* destroy an uuid-export hash body */
 468         if (obd->obd_uuid_hash) {
 469                 cfs_hash_putref(obd->obd_uuid_hash);
 470                 obd->obd_uuid_hash = NULL;
 471         }
 472
 473         class_decref(obd, "setup", obd);
 474         obd->obd_set_up = 0;
 475
 476         return 0;
 477 }
 478
 479 struct obd_device *class_incref(struct obd_device *obd,
 480                                 const char *scope, const void *source)
 481 {
 482         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 483         atomic_inc(&obd->obd_refcount);
 484         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 485                atomic_read(&obd->obd_refcount));
 486
 487         return obd;
 488 }
 489 EXPORT_SYMBOL(class_incref);
 490
 491 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 492 {
 493         int err;
 494         int refs;
 495
 496         spin_lock(&obd->obd_dev_lock);
 497         atomic_dec(&obd->obd_refcount);
 498         refs = atomic_read(&obd->obd_refcount);
 499         spin_unlock(&obd->obd_dev_lock);
 500         lu_ref_del(&obd->obd_reference, scope, source);
 501
 502         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 503
 504         if ((refs == 1) && obd->obd_stopping) {
 505                 /* All exports have been destroyed; there should
 506                    be no more in-progress ops by this point.*/
 507
 508                 spin_lock(&obd->obd_self_export->exp_lock);
 509                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
 510                 spin_unlock(&obd->obd_self_export->exp_lock);
 511
 512                 /* note that we'll recurse into class_decref again */
 513                 class_unlink_export(obd->obd_self_export);
 514                 return;
 515         }
 516
 517         if (refs == 0) {
 518                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 519                        obd->obd_name, obd->obd_uuid.uuid);
 520                 LASSERT(!obd->obd_attached);
 521                 if (obd->obd_stopping) {
 522                         /* If we're not stopping, we were never set up */
 523                         err = obd_cleanup(obd);
 524                         if (err)
 525                                 CERROR("Cleanup %s returned %d\n",
 526                                        obd->obd_name, err);
 527                 }
 528                 if (OBP(obd, detach)) {
 529                         err = OBP(obd, detach)(obd);
 530                         if (err)
 531                                 CERROR("Detach returned %d\n", err);
 532                 }
 533                 class_release_dev(obd);
 534         }
 535 }
 536 EXPORT_SYMBOL(class_decref);
 537
 538 /** Add a failover nid location.
 539  * Client obd types contact server obd types using this nid list.
 540  */
 541 static int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 542 {
 543         struct obd_import *imp;
 544         struct obd_uuid uuid;
 545         int rc;
 546
 547         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 548             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 549                 CERROR("invalid conn_uuid\n");
 550                 return -EINVAL;
 551         }
 552         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 553             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 554             strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) &&
 555             strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) &&
 556             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 557                 CERROR("can't add connection on non-client dev\n");
 558                 return -EINVAL;
 559         }
 560
 561         imp = obd->u.cli.cl_import;
 562         if (!imp) {
 563                 CERROR("try to add conn on immature client dev\n");
 564                 return -EINVAL;
 565         }
 566
 567         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 568         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 569
 570         return rc;
 571 }
 572
 573 /** Remove a failover nid location.
 574  */
 575 static int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 576 {
 577         struct obd_import *imp;
 578         struct obd_uuid uuid;
 579         int rc;
 580
 581         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 582             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 583                 CERROR("invalid conn_uuid\n");
 584                 return -EINVAL;
 585         }
 586         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 587             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 588                 CERROR("can't del connection on non-client dev\n");
 589                 return -EINVAL;
 590         }
 591
 592         imp = obd->u.cli.cl_import;
 593         if (!imp) {
 594                 CERROR("try to del conn on immature client dev\n");
 595                 return -EINVAL;
 596         }
 597
 598         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 599         rc = obd_del_conn(imp, &uuid);
 600
 601         return rc;
 602 }
 603
 604 LIST_HEAD(lustre_profile_list);
 605
 606 struct lustre_profile *class_get_profile(const char *prof)
 607 {
 608         struct lustre_profile *lprof;
 609
 610         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 611                 if (!strcmp(lprof->lp_profile, prof)) {
 612                         return lprof;
 613                 }
 614         }
 615         return NULL;
 616 }
 617 EXPORT_SYMBOL(class_get_profile);
 618
 619 /** Create a named "profile".
 620  * This defines the mdc and osc names to use for a client.
 621  * This also is used to define the lov to be used by a mdt.
 622  */
 623 static int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 624                              int mdclen, char *mdc)
 625 {
 626         struct lustre_profile *lprof;
 627         int err = 0;
 628
 629         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 630
 631         lprof = kzalloc(sizeof(*lprof), GFP_NOFS);
 632         if (!lprof)
 633                 return -ENOMEM;
 634         INIT_LIST_HEAD(&lprof->lp_list);
 635
 636         LASSERT(proflen == (strlen(prof) + 1));
 637         lprof->lp_profile = kmemdup(prof, proflen, GFP_NOFS);
 638         if (!lprof->lp_profile) {
 639                 err = -ENOMEM;
 640                 goto free_lprof;
 641         }
 642
 643         LASSERT(osclen == (strlen(osc) + 1));
 644         lprof->lp_dt = kmemdup(osc, osclen, GFP_NOFS);
 645         if (!lprof->lp_dt) {
 646                 err = -ENOMEM;
 647                 goto free_lp_profile;
 648         }
 649
 650         if (mdclen > 0) {
 651                 LASSERT(mdclen == (strlen(mdc) + 1));
 652                 lprof->lp_md = kmemdup(mdc, mdclen, GFP_NOFS);
 653                 if (!lprof->lp_md) {
 654                         err = -ENOMEM;
 655                         goto free_lp_dt;
 656                 }
 657         }
 658
 659         list_add(&lprof->lp_list, &lustre_profile_list);
 660         return err;
 661
 662 free_lp_dt:
 663         kfree(lprof->lp_dt);
 664 free_lp_profile:
 665         kfree(lprof->lp_profile);
 666 free_lprof:
 667         kfree(lprof);
 668         return err;
 669 }
 670
 671 void class_del_profile(const char *prof)
 672 {
 673         struct lustre_profile *lprof;
 674
 675         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 676
 677         lprof = class_get_profile(prof);
 678         if (lprof) {
 679                 list_del(&lprof->lp_list);
 680                 kfree(lprof->lp_profile);
 681                 kfree(lprof->lp_dt);
 682                 kfree(lprof->lp_md);
 683                 kfree(lprof);
 684         }
 685 }
 686 EXPORT_SYMBOL(class_del_profile);
 687
 688 /* COMPAT_146 */
 689 void class_del_profiles(void)
 690 {
 691         struct lustre_profile *lprof, *n;
 692
 693         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 694                 list_del(&lprof->lp_list);
 695                 kfree(lprof->lp_profile);
 696                 kfree(lprof->lp_dt);
 697                 kfree(lprof->lp_md);
 698                 kfree(lprof);
 699         }
 700 }
 701 EXPORT_SYMBOL(class_del_profiles);
 702
 703 static int class_set_global(char *ptr, int val, struct lustre_cfg *lcfg)
 704 {
 705         if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
 706                 at_min = val;
 707         else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
 708                 at_max = val;
 709         else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
 710                 at_extra = val;
 711         else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
 712                 at_early_margin = val;
 713         else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
 714                 at_history = val;
 715         else if (class_match_param(ptr, PARAM_JOBID_VAR, NULL) == 0)
 716                 strlcpy(obd_jobid_var, lustre_cfg_string(lcfg, 2),
 717                         JOBSTATS_JOBID_VAR_MAX_LEN + 1);
 718         else
 719                 return -EINVAL;
 720
 721         CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
 722         return 0;
 723 }
 724
 725 /* We can't call ll_process_config or lquota_process_config directly because
 726  * it lives in a module that must be loaded after this one. */
 727 static int (*client_process_config)(struct lustre_cfg *lcfg);
 728 static int (*quota_process_config)(struct lustre_cfg *lcfg);
 729
 730 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 731 {
 732         client_process_config = cpc;
 733 }
 734 EXPORT_SYMBOL(lustre_register_client_process_config);
 735
 736 static int process_param2_config(struct lustre_cfg *lcfg)
 737 {
 738         char *param = lustre_cfg_string(lcfg, 1);
 739         char *upcall = lustre_cfg_string(lcfg, 2);
 740         char *argv[] = {
 741                 [0] = "/usr/sbin/lctl",
 742                 [1] = "set_param",
 743                 [2] = param,
 744                 [3] = NULL
 745         };
 746         ktime_t start;
 747         ktime_t end;
 748         int             rc;
 749
 750         /* Add upcall processing here. Now only lctl is supported */
 751         if (strcmp(upcall, LCTL_UPCALL) != 0) {
 752                 CERROR("Unsupported upcall %s\n", upcall);
 753                 return -EINVAL;
 754         }
 755
 756         start = ktime_get();
 757         rc = call_usermodehelper(argv[0], argv, NULL, 1);
 758         end = ktime_get();
 759
 760         if (rc < 0) {
 761                 CERROR(
 762                        "lctl: error invoking upcall %s %s %s: rc = %d; time %ldus\n",
 763                        argv[0], argv[1], argv[2], rc,
 764                        (long)ktime_us_delta(end, start));
 765         } else {
 766                 CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
 767                        argv[0], argv[1], argv[2],
 768                        (long)ktime_us_delta(end, start));
 769                        rc = 0;
 770         }
 771
 772         return rc;
 773 }
 774
 775 /** Process configuration commands given in lustre_cfg form.
 776  * These may come from direct calls (e.g. class_manual_cleanup)
 777  * or processing the config llog, or ioctl from lctl.
 778  */
 779 int class_process_config(struct lustre_cfg *lcfg)
 780 {
 781         struct obd_device *obd;
 782         int err;
 783
 784         LASSERT(lcfg && !IS_ERR(lcfg));
 785         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
 786
 787         /* Commands that don't need a device */
 788         switch (lcfg->lcfg_command) {
 789         case LCFG_ATTACH: {
 790                 err = class_attach(lcfg);
 791                 goto out;
 792         }
 793         case LCFG_ADD_UUID: {
 794                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid %#llx (%s)\n",
 795                        lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid,
 796                        libcfs_nid2str(lcfg->lcfg_nid));
 797
 798                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
 799                 goto out;
 800         }
 801         case LCFG_DEL_UUID: {
 802                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
 803                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
 804                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
 805
 806                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
 807                 goto out;
 808         }
 809         case LCFG_MOUNTOPT: {
 810                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
 811                        lustre_cfg_string(lcfg, 1),
 812                        lustre_cfg_string(lcfg, 2),
 813                        lustre_cfg_string(lcfg, 3));
 814                 /* set these mount options somewhere, so ll_fill_super
 815                  * can find them. */
 816                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
 817                                         lustre_cfg_string(lcfg, 1),
 818                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
 819                                         lustre_cfg_string(lcfg, 2),
 820                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
 821                                         lustre_cfg_string(lcfg, 3));
 822                 goto out;
 823         }
 824         case LCFG_DEL_MOUNTOPT: {
 825                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
 826                        lustre_cfg_string(lcfg, 1));
 827                 class_del_profile(lustre_cfg_string(lcfg, 1));
 828                 err = 0;
 829                 goto out;
 830         }
 831         case LCFG_SET_TIMEOUT: {
 832                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
 833                        obd_timeout, lcfg->lcfg_num);
 834                 obd_timeout = max(lcfg->lcfg_num, 1U);
 835                 obd_timeout_set = 1;
 836                 err = 0;
 837                 goto out;
 838         }
 839         case LCFG_SET_LDLM_TIMEOUT: {
 840                 /* ldlm_timeout is not used on the client */
 841                 err = 0;
 842                 goto out;
 843         }
 844         case LCFG_SET_UPCALL: {
 845                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
 846                 /* COMPAT_146 Don't fail on old configs */
 847                 err = 0;
 848                 goto out;
 849         }
 850         case LCFG_MARKER: {
 851                 struct cfg_marker *marker;
 852
 853                 marker = lustre_cfg_buf(lcfg, 1);
 854                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
 855                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
 856                 err = 0;
 857                 goto out;
 858         }
 859         case LCFG_PARAM: {
 860                 char *tmp;
 861                 /* llite has no obd */
 862                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
 863                                        PARAM_LLITE, NULL) == 0) &&
 864                     client_process_config) {
 865                         err = (*client_process_config)(lcfg);
 866                         goto out;
 867                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
 868                                               PARAM_SYS, &tmp) == 0)) {
 869                         /* Global param settings */
 870                         err = class_set_global(tmp, lcfg->lcfg_num, lcfg);
 871                         /*
 872                          * Client or server should not fail to mount if
 873                          * it hits an unknown configuration parameter.
 874                          */
 875                         if (err != 0)
 876                                 CWARN("Ignoring unknown param %s\n", tmp);
 877
 878                         err = 0;
 879                         goto out;
 880                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
 881                                               PARAM_QUOTA, &tmp) == 0) &&
 882                            quota_process_config) {
 883                         err = (*quota_process_config)(lcfg);
 884                         goto out;
 885                 }
 886
 887                 break;
 888         }
 889         case LCFG_SET_PARAM: {
 890                 err = process_param2_config(lcfg);
 891                 goto out;
 892         }
 893         }
 894         /* Commands that require a device */
 895         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
 896         if (!obd) {
 897                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
 898                         CERROR("this lcfg command requires a device name\n");
 899                 else
 900                         CERROR("no device for: %s\n",
 901                                lustre_cfg_string(lcfg, 0));
 902
 903                 err = -EINVAL;
 904                 goto out;
 905         }
 906
 907         switch (lcfg->lcfg_command) {
 908         case LCFG_SETUP: {
 909                 err = class_setup(obd, lcfg);
 910                 goto out;
 911         }
 912         case LCFG_DETACH: {
 913                 err = class_detach(obd, lcfg);
 914                 err = 0;
 915                 goto out;
 916         }
 917         case LCFG_CLEANUP: {
 918                 err = class_cleanup(obd, lcfg);
 919                 err = 0;
 920                 goto out;
 921         }
 922         case LCFG_ADD_CONN: {
 923                 err = class_add_conn(obd, lcfg);
 924                 err = 0;
 925                 goto out;
 926         }
 927         case LCFG_DEL_CONN: {
 928                 err = class_del_conn(obd, lcfg);
 929                 err = 0;
 930                 goto out;
 931         }
 932         case LCFG_POOL_NEW: {
 933                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
 934                 err = 0;
 935                 goto out;
 936         }
 937         case LCFG_POOL_ADD: {
 938                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
 939                                    lustre_cfg_string(lcfg, 3));
 940                 err = 0;
 941                 goto out;
 942         }
 943         case LCFG_POOL_REM: {
 944                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
 945                                    lustre_cfg_string(lcfg, 3));
 946                 err = 0;
 947                 goto out;
 948         }
 949         case LCFG_POOL_DEL: {
 950                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
 951                 err = 0;
 952                 goto out;
 953         }
 954         default: {
 955                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
 956                 goto out;
 957
 958         }
 959         }
 960 out:
 961         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
 962                 CWARN("Ignoring error %d on optional command %#x\n", err,
 963                       lcfg->lcfg_command);
 964                 err = 0;
 965         }
 966         return err;
 967 }
 968 EXPORT_SYMBOL(class_process_config);
 969
 970 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 971                              struct lustre_cfg *lcfg, void *data)
 972 {
 973         struct lprocfs_vars *var;
 974         struct file fakefile;
 975         struct seq_file fake_seqfile;
 976         char *key, *sval;
 977         int i, keylen, vallen;
 978         int matched = 0, j = 0;
 979         int rc = 0;
 980         int skip = 0;
 981
 982         if (lcfg->lcfg_command != LCFG_PARAM) {
 983                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 984                 return -EINVAL;
 985         }
 986
 987         /* fake a seq file so that var->fops->write can work... */
 988         fakefile.private_data = &fake_seqfile;
 989         fake_seqfile.private = data;
 990         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
 991            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
 992            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
 993         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
 994                 key = lustre_cfg_buf(lcfg, i);
 995                 /* Strip off prefix */
 996                 class_match_param(key, prefix, &key);
 997                 sval = strchr(key, '=');
 998                 if (!sval || (*(sval + 1) == 0)) {
 999                         CERROR("Can't parse param %s (missing '=')\n", key);
1000                         /* rc = -EINVAL;        continue parsing other params */
1001                         continue;
1002                 }
1003                 keylen = sval - key;
1004                 sval++;
1005                 vallen = strlen(sval);
1006                 matched = 0;
1007                 j = 0;
1008                 /* Search proc entries */
1009                 while (lvars[j].name) {
1010                         var = &lvars[j];
1011                         if (class_match_param(key, (char *)var->name, NULL) == 0
1012                             && keylen == strlen(var->name)) {
1013                                 matched++;
1014                                 rc = -EROFS;
1015                                 if (var->fops && var->fops->write) {
1016                                         mm_segment_t oldfs;
1017
1018                                         oldfs = get_fs();
1019                                         set_fs(KERNEL_DS);
1020                                         rc = (var->fops->write)(&fakefile, sval,
1021                                                                 vallen, NULL);
1022                                         set_fs(oldfs);
1023                                 }
1024                                 break;
1025                         }
1026                         j++;
1027                 }
1028                 if (!matched) {
1029                         /* If the prefix doesn't match, return error so we
1030                            can pass it down the stack */
1031                         if (strnchr(key, keylen, '.'))
1032                             return -ENOSYS;
1033                         CERROR("%s: unknown param %s\n",
1034                                (char *)lustre_cfg_string(lcfg, 0), key);
1035                         /* rc = -EINVAL;        continue parsing other params */
1036                         skip++;
1037                 } else if (rc < 0) {
1038                         CERROR("writing proc entry %s err %d\n",
1039                                var->name, rc);
1040                         rc = 0;
1041                 } else {
1042                         CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1043                                          lustre_cfg_string(lcfg, 0),
1044                                          (int)strlen(prefix) - 1, prefix,
1045                                          (int)(sval - key - 1), key, sval);
1046                 }
1047         }
1048
1049         if (rc > 0)
1050                 rc = 0;
1051         if (!rc && skip)
1052                 rc = skip;
1053         return rc;
1054 }
1055 EXPORT_SYMBOL(class_process_proc_param);
1056
1057 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1058
1059 /** Parse a configuration llog, doing various manipulations on them
1060  * for various reasons, (modifications for compatibility, skip obsolete
1061  * records, change uuids, etc), then class_process_config() resulting
1062  * net records.
1063  */
1064 int class_config_llog_handler(const struct lu_env *env,
1065                               struct llog_handle *handle,
1066                               struct llog_rec_hdr *rec, void *data)
1067 {
1068         struct config_llog_instance *clli = data;
1069         int cfg_len = rec->lrh_len;
1070         char *cfg_buf = (char *) (rec + 1);
1071         int rc = 0;
1072
1073         switch (rec->lrh_type) {
1074         case OBD_CFG_REC: {
1075                 struct lustre_cfg *lcfg, *lcfg_new;
1076                 struct lustre_cfg_bufs bufs;
1077                 char *inst_name = NULL;
1078                 int inst_len = 0;
1079                 int inst = 0, swab = 0;
1080
1081                 lcfg = (struct lustre_cfg *)cfg_buf;
1082                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1083                         lustre_swab_lustre_cfg(lcfg);
1084                         swab = 1;
1085                 }
1086
1087                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1088                 if (rc)
1089                         goto out;
1090
1091                 /* Figure out config state info */
1092                 if (lcfg->lcfg_command == LCFG_MARKER) {
1093                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1094
1095                         lustre_swab_cfg_marker(marker, swab,
1096                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1097                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1098                                clli->cfg_flags, marker->cm_flags);
1099                         if (marker->cm_flags & CM_START) {
1100                                 /* all previous flags off */
1101                                 clli->cfg_flags = CFG_F_MARKER;
1102                                 if (marker->cm_flags & CM_SKIP) {
1103                                         clli->cfg_flags |= CFG_F_SKIP;
1104                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1105                                                marker->cm_step);
1106                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1107                                            (clli->cfg_sb &&
1108                                             lustre_check_exclusion(clli->cfg_sb,
1109                                                          marker->cm_tgtname))) {
1110                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1111                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1112                                                marker->cm_step);
1113                                 }
1114                         } else if (marker->cm_flags & CM_END) {
1115                                 clli->cfg_flags = 0;
1116                         }
1117                 }
1118                 /* A config command without a start marker before it is
1119                    illegal (post 146) */
1120                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1121                     !(clli->cfg_flags & CFG_F_MARKER) &&
1122                     (lcfg->lcfg_command != LCFG_MARKER)) {
1123                         CWARN("Config not inside markers, ignoring! (inst: %p, uuid: %s, flags: %#x)\n",
1124                               clli->cfg_instance,
1125                               clli->cfg_uuid.uuid, clli->cfg_flags);
1126                         clli->cfg_flags |= CFG_F_SKIP;
1127                 }
1128                 if (clli->cfg_flags & CFG_F_SKIP) {
1129                         CDEBUG(D_CONFIG, "skipping %#x\n",
1130                                clli->cfg_flags);
1131                         rc = 0;
1132                         /* No processing! */
1133                         break;
1134                 }
1135
1136                 /*
1137                  * For interoperability between 1.8 and 2.0,
1138                  * rename "mds" obd device type to "mdt".
1139                  */
1140                 {
1141                         char *typename = lustre_cfg_string(lcfg, 1);
1142                         char *index = lustre_cfg_string(lcfg, 2);
1143
1144                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1145                              strcmp(typename, "mds") == 0)) {
1146                                 CWARN("For 1.8 interoperability, rename obd type from mds to mdt\n");
1147                                 typename[2] = 't';
1148                         }
1149                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1150                              strcmp(index, "type") == 0)) {
1151                                 CDEBUG(D_INFO, "For 1.8 interoperability, set this index to '0'\n");
1152                                 index[0] = '0';
1153                                 index[1] = 0;
1154                         }
1155                 }
1156
1157                 if (clli->cfg_flags & CFG_F_EXCLUDE) {
1158                         CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
1159                                lcfg->lcfg_command);
1160                         if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
1161                                 /* Add inactive instead */
1162                                 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1163                 }
1164
1165                 lustre_cfg_bufs_init(&bufs, lcfg);
1166
1167                 if (clli && clli->cfg_instance &&
1168                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0) {
1169                         inst = 1;
1170                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1171                                    sizeof(clli->cfg_instance) * 2 + 4;
1172                         inst_name = kasprintf(GFP_NOFS, "%s-%p",
1173                                               lustre_cfg_string(lcfg, 0),
1174                                               clli->cfg_instance);
1175                         if (!inst_name) {
1176                                 rc = -ENOMEM;
1177                                 goto out;
1178                         }
1179                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1180                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1181                                lcfg->lcfg_command, inst_name);
1182                 }
1183
1184                 /* we override the llog's uuid for clients, to insure they
1185                 are unique */
1186                 if (clli && clli->cfg_instance != NULL &&
1187                     lcfg->lcfg_command == LCFG_ATTACH) {
1188                         lustre_cfg_bufs_set_string(&bufs, 2,
1189                                                    clli->cfg_uuid.uuid);
1190                 }
1191                 /*
1192                  * sptlrpc config record, we expect 2 data segments:
1193                  *  [0]: fs_name/target_name,
1194                  *  [1]: rule string
1195                  * moving them to index [1] and [2], and insert MGC's
1196                  * obdname at index [0].
1197                  */
1198                 if (clli && !clli->cfg_instance &&
1199                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1200                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1201                                             bufs.lcfg_buflen[1]);
1202                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1203                                             bufs.lcfg_buflen[0]);
1204                         lustre_cfg_bufs_set_string(&bufs, 0,
1205                                                    clli->cfg_obdname);
1206                 }
1207
1208                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1209
1210                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1211                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1212
1213                 /* XXX Hack to try to remain binary compatible with
1214                  * pre-newconfig logs */
1215                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1216                     (lcfg->lcfg_nid >> 32) == 0) {
1217                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1218
1219                         lcfg_new->lcfg_nid =
1220                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1221                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1222                               lcfg->lcfg_nal, addr,
1223                               libcfs_nid2str(lcfg_new->lcfg_nid));
1224                 } else {
1225                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1226                 }
1227
1228                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1229
1230                 rc = class_process_config(lcfg_new);
1231                 lustre_cfg_free(lcfg_new);
1232
1233                 if (inst)
1234                         kfree(inst_name);
1235                 break;
1236         }
1237         default:
1238                 CERROR("Unknown llog record type %#x encountered\n",
1239                        rec->lrh_type);
1240                 break;
1241         }
1242 out:
1243         if (rc) {
1244                 CERROR("%s: cfg command failed: rc = %d\n",
1245                        handle->lgh_ctxt->loc_obd->obd_name, rc);
1246                 class_config_dump_handler(NULL, handle, rec, data);
1247         }
1248         return rc;
1249 }
1250 EXPORT_SYMBOL(class_config_llog_handler);
1251
1252 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1253                             char *name, struct config_llog_instance *cfg)
1254 {
1255         struct llog_process_cat_data     cd = {0, 0};
1256         struct llog_handle              *llh;
1257         llog_cb_t                        callback;
1258         int                              rc;
1259
1260         CDEBUG(D_INFO, "looking up llog %s\n", name);
1261         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1262         if (rc)
1263                 return rc;
1264
1265         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1266         if (rc)
1267                 goto parse_out;
1268
1269         /* continue processing from where we last stopped to end-of-log */
1270         if (cfg) {
1271                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1272                 callback = cfg->cfg_callback;
1273                 LASSERT(callback != NULL);
1274         } else {
1275                 callback = class_config_llog_handler;
1276         }
1277
1278         cd.lpcd_last_idx = 0;
1279
1280         rc = llog_process(env, llh, callback, cfg, &cd);
1281
1282         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1283                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1284         if (cfg)
1285                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1286
1287 parse_out:
1288         llog_close(env, llh);
1289         return rc;
1290 }
1291 EXPORT_SYMBOL(class_config_parse_llog);
1292
1293 /**
1294  * parse config record and output dump in supplied buffer.
1295  * This is separated from class_config_dump_handler() to use
1296  * for ioctl needs as well
1297  */
1298 static int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf,
1299                                   int size)
1300 {
1301         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1302         char                    *ptr = buf;
1303         char                    *end = buf + size;
1304         int                      rc = 0;
1305
1306         LASSERT(rec->lrh_type == OBD_CFG_REC);
1307         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1308         if (rc < 0)
1309                 return rc;
1310
1311         ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
1312         if (lcfg->lcfg_flags)
1313                 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1314                                 lcfg->lcfg_flags);
1315
1316         if (lcfg->lcfg_num)
1317                 ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
1318
1319         if (lcfg->lcfg_nid) {
1320                 char nidstr[LNET_NIDSTR_SIZE];
1321
1322                 libcfs_nid2str_r(lcfg->lcfg_nid, nidstr, sizeof(nidstr));
1323                 ptr += snprintf(ptr, end-ptr, "nid=%s(%#llx)\n     ",
1324                                 nidstr, lcfg->lcfg_nid);
1325         }
1326
1327         if (lcfg->lcfg_command == LCFG_MARKER) {
1328                 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1329
1330                 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1331                                 marker->cm_step, marker->cm_flags,
1332                                 marker->cm_tgtname, marker->cm_comment);
1333         } else {
1334                 int i;
1335
1336                 for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1337                         ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1338                                         lustre_cfg_string(lcfg, i));
1339                 }
1340         }
1341         /* return consumed bytes */
1342         rc = ptr - buf;
1343         return rc;
1344 }
1345
1346 int class_config_dump_handler(const struct lu_env *env,
1347                               struct llog_handle *handle,
1348                               struct llog_rec_hdr *rec, void *data)
1349 {
1350         char    *outstr;
1351         int      rc = 0;
1352
1353         outstr = kzalloc(256, GFP_NOFS);
1354         if (!outstr)
1355                 return -ENOMEM;
1356
1357         if (rec->lrh_type == OBD_CFG_REC) {
1358                 class_config_parse_rec(rec, outstr, 256);
1359                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1360         } else {
1361                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1362                 rc = -EINVAL;
1363         }
1364
1365         kfree(outstr);
1366         return rc;
1367 }
1368
1369 /** Call class_cleanup and class_detach.
1370  * "Manual" only in the sense that we're faking lcfg commands.
1371  */
1372 int class_manual_cleanup(struct obd_device *obd)
1373 {
1374         char                flags[3] = "";
1375         struct lustre_cfg      *lcfg;
1376         struct lustre_cfg_bufs  bufs;
1377         int                  rc;
1378
1379         if (!obd) {
1380                 CERROR("empty cleanup\n");
1381                 return -EALREADY;
1382         }
1383
1384         if (obd->obd_force)
1385                 strcat(flags, "F");
1386         if (obd->obd_fail)
1387                 strcat(flags, "A");
1388
1389         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1390                obd->obd_name, flags);
1391
1392         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1393         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1394         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1395         if (!lcfg)
1396                 return -ENOMEM;
1397
1398         rc = class_process_config(lcfg);
1399         if (rc) {
1400                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1401                 goto out;
1402         }
1403
1404         /* the lcfg is almost the same for both ops */
1405         lcfg->lcfg_command = LCFG_DETACH;
1406         rc = class_process_config(lcfg);
1407         if (rc)
1408                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1409 out:
1410         lustre_cfg_free(lcfg);
1411         return rc;
1412 }
1413 EXPORT_SYMBOL(class_manual_cleanup);
1414
1415 /*
1416  * uuid<->export lustre hash operations
1417  */
1418
1419 static unsigned
1420 uuid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
1421 {
1422         return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
1423                                   sizeof(((struct obd_uuid *)key)->uuid), mask);
1424 }
1425
1426 static void *
1427 uuid_key(struct hlist_node *hnode)
1428 {
1429         struct obd_export *exp;
1430
1431         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1432
1433         return &exp->exp_client_uuid;
1434 }
1435
1436 /*
1437  * NOTE: It is impossible to find an export that is in failed
1438  *       state with this function
1439  */
1440 static int
1441 uuid_keycmp(const void *key, struct hlist_node *hnode)
1442 {
1443         struct obd_export *exp;
1444
1445         LASSERT(key);
1446         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1447
1448         return obd_uuid_equals(key, &exp->exp_client_uuid) &&
1449                !exp->exp_failed;
1450 }
1451
1452 static void *
1453 uuid_export_object(struct hlist_node *hnode)
1454 {
1455         return hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1456 }
1457
1458 static void
1459 uuid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
1460 {
1461         struct obd_export *exp;
1462
1463         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1464         class_export_get(exp);
1465 }
1466
1467 static void
1468 uuid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
1469 {
1470         struct obd_export *exp;
1471
1472         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1473         class_export_put(exp);
1474 }
1475
1476 static struct cfs_hash_ops uuid_hash_ops = {
1477         .hs_hash        = uuid_hash,
1478         .hs_key         = uuid_key,
1479         .hs_keycmp      = uuid_keycmp,
1480         .hs_object      = uuid_export_object,
1481         .hs_get         = uuid_export_get,
1482         .hs_put_locked  = uuid_export_put_locked,
1483 };