lustre/obdclass/obd_config.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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 #ifdef __KERNEL__
  43 #include <obd_class.h>
  44 #include <linux/string.h>
  45 #else
  46 #include <liblustre.h>
  47 #include <obd_class.h>
  48 #include <obd.h>
  49 #endif
  50 #include <lustre_log.h>
  51 #include <lprocfs_status.h>
  52 #include <libcfs/list.h>
  53 #include <lustre_param.h>
  54
  55 static cfs_hash_ops_t uuid_hash_ops;
  56 static cfs_hash_ops_t nid_hash_ops;
  57 static cfs_hash_ops_t nid_stat_hash_ops;
  58
  59 /*********** string parsing utils *********/
  60
  61 /* returns 0 if we find this key in the buffer, else 1 */
  62 int class_find_param(char *buf, char *key, char **valp)
  63 {
  64         char *ptr;
  65
  66         if (!buf)
  67                 return 1;
  68
  69         if ((ptr = strstr(buf, key)) == NULL)
  70                 return 1;
  71
  72         if (valp)
  73                 *valp = ptr + strlen(key);
  74
  75         return 0;
  76 }
  77
  78 /**
  79  * Finds a parameter in \a params and copies it to \a copy.
  80  *
  81  * Leading spaces are skipped. Next space or end of string is the
  82  * parameter terminator with the exception that spaces inside single or double
  83  * quotes get included into a parameter. The parameter is copied into \a copy
  84  * which has to be allocated big enough by a caller, quotes are stripped in
  85  * the copy and the copy is terminated by 0.
  86  *
  87  * On return \a params is set to next parameter or to NULL if last
  88  * parameter is returned.
  89  *
  90  * \retval 0 if parameter is returned in \a copy
  91  * \retval 1 otherwise
  92  * \retval -EINVAL if unbalanced quota is found
  93  */
  94 int class_get_next_param(char **params, char *copy)
  95 {
  96         char *q1, *q2, *str;
  97         int len;
  98
  99         str = *params;
 100         while (*str == ' ')
 101                 str++;
 102
 103         if (*str == '\0') {
 104                 *params = NULL;
 105                 return 1;
 106         }
 107
 108         while (1) {
 109                 q1 = strpbrk(str, " '\"");
 110                 if (q1 == NULL) {
 111                         len = strlen(str);
 112                         memcpy(copy, str, len);
 113                         copy[len] = '\0';
 114                         *params = NULL;
 115                         return 0;
 116                 }
 117                 len = q1 - str;
 118                 if (*q1 == ' ') {
 119                         memcpy(copy, str, len);
 120                         copy[len] = '\0';
 121                         *params = str + len;
 122                         return 0;
 123                 }
 124
 125                 memcpy(copy, str, len);
 126                 copy += len;
 127
 128                 /* search for the matching closing quote */
 129                 str = q1 + 1;
 130                 q2 = strchr(str, *q1);
 131                 if (q2 == NULL) {
 132                         CERROR("Unbalanced quota in parameters: \"%s\"\n",
 133                                *params);
 134                         return -EINVAL;
 135                 }
 136                 len = q2 - str;
 137                 memcpy(copy, str, len);
 138                 copy += len;
 139                 str = q2 + 1;
 140         }
 141         return 1;
 142 }
 143
 144 /* returns 0 if this is the first key in the buffer, else 1.
 145    valp points to first char after key. */
 146 int class_match_param(char *buf, char *key, char **valp)
 147 {
 148         if (!buf)
 149                 return 1;
 150
 151         if (memcmp(buf, key, strlen(key)) != 0)
 152                 return 1;
 153
 154         if (valp)
 155                 *valp = buf + strlen(key);
 156
 157         return 0;
 158 }
 159
 160 /* 0 is good nid,
 161    1 not found
 162    < 0 error
 163    endh is set to next separator */
 164 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
 165 {
 166         char tmp, *endp;
 167
 168         if (!buf)
 169                 return 1;
 170         while (*buf == ',' || *buf == ':')
 171                 buf++;
 172         if (*buf == ' ' || *buf == '/' || *buf == '\0')
 173                 return 1;
 174
 175         /* nid separators or end of nids */
 176         endp = strpbrk(buf, ",: /");
 177         if (endp == NULL)
 178                 endp = buf + strlen(buf);
 179
 180         tmp = *endp;
 181         *endp = '\0';
 182         *nid = libcfs_str2nid(buf);
 183         if (*nid == LNET_NID_ANY) {
 184                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
 185                 *endp = tmp;
 186                 return -EINVAL;
 187         }
 188         *endp = tmp;
 189
 190         if (endh)
 191                 *endh = endp;
 192         CDEBUG(D_INFO, "Nid %s\n", libcfs_nid2str(*nid));
 193         return 0;
 194 }
 195
 196 EXPORT_SYMBOL(class_find_param);
 197 EXPORT_SYMBOL(class_get_next_param);
 198 EXPORT_SYMBOL(class_match_param);
 199 EXPORT_SYMBOL(class_parse_nid);
 200
 201 /********************** class fns **********************/
 202
 203 /**
 204  * Create a new device and set the type, name and uuid.  If successful, the new
 205  * device can be accessed by either name or uuid.
 206  */
 207 int class_attach(struct lustre_cfg *lcfg)
 208 {
 209         struct obd_device *obd = NULL;
 210         char *typename, *name, *uuid;
 211         int rc, len;
 212         ENTRY;
 213
 214         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 215                 CERROR("No type passed!\n");
 216                 RETURN(-EINVAL);
 217         }
 218         typename = lustre_cfg_string(lcfg, 1);
 219
 220         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
 221                 CERROR("No name passed!\n");
 222                 RETURN(-EINVAL);
 223         }
 224         name = lustre_cfg_string(lcfg, 0);
 225
 226         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
 227                 CERROR("No UUID passed!\n");
 228                 RETURN(-EINVAL);
 229         }
 230         uuid = lustre_cfg_string(lcfg, 2);
 231
 232         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 233                MKSTR(typename), MKSTR(name), MKSTR(uuid));
 234
 235         obd = class_newdev(typename, name);
 236         if (IS_ERR(obd)) {
 237                 /* Already exists or out of obds */
 238                 rc = PTR_ERR(obd);
 239                 obd = NULL;
 240                 CERROR("Cannot create device %s of type %s : %d\n",
 241                        name, typename, rc);
 242                 GOTO(out, rc);
 243         }
 244         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
 245                  name, typename);
 246         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 247                  "obd %p obd_magic %08X != %08X\n",
 248                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 249         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
 250                  "%p obd_name %s != %s\n", obd, obd->obd_name, name);
 251
 252         cfs_rwlock_init(&obd->obd_pool_lock);
 253         obd->obd_pool_limit = 0;
 254         obd->obd_pool_slv = 0;
 255
 256         CFS_INIT_LIST_HEAD(&obd->obd_exports);
 257         CFS_INIT_LIST_HEAD(&obd->obd_unlinked_exports);
 258         CFS_INIT_LIST_HEAD(&obd->obd_delayed_exports);
 259         CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
 260         CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
 261         cfs_spin_lock_init(&obd->obd_nid_lock);
 262         cfs_spin_lock_init(&obd->obd_dev_lock);
 263         cfs_sema_init(&obd->obd_dev_sem, 1);
 264         cfs_spin_lock_init(&obd->obd_osfs_lock);
 265         /* obd->obd_osfs_age must be set to a value in the distant
 266          * past to guarantee a fresh statfs is fetched on mount. */
 267         obd->obd_osfs_age = cfs_time_shift_64(-1000);
 268
 269         /* XXX belongs in setup not attach  */
 270         cfs_init_rwsem(&obd->obd_observer_link_sem);
 271         /* recovery data */
 272         cfs_init_timer(&obd->obd_recovery_timer);
 273         cfs_spin_lock_init(&obd->obd_processing_task_lock);
 274         cfs_waitq_init(&obd->obd_next_transno_waitq);
 275         cfs_waitq_init(&obd->obd_evict_inprogress_waitq);
 276         CFS_INIT_LIST_HEAD(&obd->obd_req_replay_queue);
 277         CFS_INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
 278         CFS_INIT_LIST_HEAD(&obd->obd_final_req_queue);
 279         CFS_INIT_LIST_HEAD(&obd->obd_evict_list);
 280
 281         llog_group_init(&obd->obd_olg, FILTER_GROUP_LLOG);
 282
 283         len = strlen(uuid);
 284         if (len >= sizeof(obd->obd_uuid)) {
 285                 CERROR("uuid must be < %d bytes long\n",
 286                        (int)sizeof(obd->obd_uuid));
 287                 GOTO(out, rc = -EINVAL);
 288         }
 289         memcpy(obd->obd_uuid.uuid, uuid, len);
 290
 291         /* do the attach */
 292         if (OBP(obd, attach)) {
 293                 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
 294                 if (rc)
 295                         GOTO(out, rc = -EINVAL);
 296         }
 297
 298         /* Detach drops this */
 299         cfs_spin_lock(&obd->obd_dev_lock);
 300         cfs_atomic_set(&obd->obd_refcount, 1);
 301         cfs_spin_unlock(&obd->obd_dev_lock);
 302         lu_ref_init(&obd->obd_reference);
 303         lu_ref_add(&obd->obd_reference, "attach", obd);
 304
 305         obd->obd_attached = 1;
 306         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 307                obd->obd_minor, typename, cfs_atomic_read(&obd->obd_refcount));
 308         RETURN(0);
 309  out:
 310         if (obd != NULL) {
 311                 class_release_dev(obd);
 312         }
 313         return rc;
 314 }
 315
 316 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 317 {
 318         int err = 0;
 319         struct obd_export *exp;
 320         ENTRY;
 321
 322         LASSERT(obd != NULL);
 323         LASSERTF(obd == class_num2obd(obd->obd_minor),
 324                  "obd %p != obd_devs[%d] %p\n",
 325                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 326         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 327                  "obd %p obd_magic %08x != %08x\n",
 328                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 329
 330         /* have we attached a type to this device? */
 331         if (!obd->obd_attached) {
 332                 CERROR("Device %d not attached\n", obd->obd_minor);
 333                 RETURN(-ENODEV);
 334         }
 335
 336         if (obd->obd_set_up) {
 337                 CERROR("Device %d already setup (type %s)\n",
 338                        obd->obd_minor, obd->obd_type->typ_name);
 339                 RETURN(-EEXIST);
 340         }
 341
 342         /* is someone else setting us up right now? (attach inits spinlock) */
 343         cfs_spin_lock(&obd->obd_dev_lock);
 344         if (obd->obd_starting) {
 345                 cfs_spin_unlock(&obd->obd_dev_lock);
 346                 CERROR("Device %d setup in progress (type %s)\n",
 347                        obd->obd_minor, obd->obd_type->typ_name);
 348                 RETURN(-EEXIST);
 349         }
 350         /* just leave this on forever.  I can't use obd_set_up here because
 351            other fns check that status, and we're not actually set up yet. */
 352         obd->obd_starting = 1;
 353         obd->obd_uuid_hash = NULL;
 354         obd->obd_nid_hash = NULL;
 355         obd->obd_nid_stats_hash = NULL;
 356         cfs_spin_unlock(&obd->obd_dev_lock);
 357
 358         /* create an uuid-export lustre hash */
 359         obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
 360                                              HASH_UUID_CUR_BITS,
 361                                              HASH_UUID_MAX_BITS,
 362                                              &uuid_hash_ops, CFS_HASH_REHASH);
 363         if (!obd->obd_uuid_hash)
 364                 GOTO(err_hash, err = -ENOMEM);
 365
 366         /* create a nid-export lustre hash */
 367         obd->obd_nid_hash = cfs_hash_create("NID_HASH",
 368                                             HASH_NID_CUR_BITS,
 369                                             HASH_NID_MAX_BITS,
 370                                             &nid_hash_ops, CFS_HASH_REHASH);
 371         if (!obd->obd_nid_hash)
 372                 GOTO(err_hash, err = -ENOMEM);
 373
 374         /* create a nid-stats lustre hash */
 375         obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
 376                                                   HASH_NID_STATS_CUR_BITS,
 377                                                   HASH_NID_STATS_MAX_BITS,
 378                                                   &nid_stat_hash_ops, CFS_HASH_REHASH);
 379         if (!obd->obd_nid_stats_hash)
 380                 GOTO(err_hash, err = -ENOMEM);
 381
 382         exp = class_new_export(obd, &obd->obd_uuid);
 383         if (IS_ERR(exp))
 384                 GOTO(err_hash, err = PTR_ERR(exp));
 385
 386         obd->obd_self_export = exp;
 387         cfs_list_del_init(&exp->exp_obd_chain_timed);
 388         class_export_put(exp);
 389
 390         err = obd_setup(obd, lcfg);
 391         if (err)
 392                 GOTO(err_exp, err);
 393
 394         obd->obd_set_up = 1;
 395
 396         cfs_spin_lock(&obd->obd_dev_lock);
 397         /* cleanup drops this */
 398         class_incref(obd, "setup", obd);
 399         cfs_spin_unlock(&obd->obd_dev_lock);
 400
 401         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 402                obd->obd_name, obd->obd_uuid.uuid);
 403
 404         RETURN(0);
 405 err_exp:
 406         if (obd->obd_self_export) {
 407                 class_unlink_export(obd->obd_self_export);
 408                 obd->obd_self_export = NULL;
 409         }
 410 err_hash:
 411         if (obd->obd_uuid_hash) {
 412                 cfs_hash_putref(obd->obd_uuid_hash);
 413                 obd->obd_uuid_hash = NULL;
 414         }
 415         if (obd->obd_nid_hash) {
 416                 cfs_hash_putref(obd->obd_nid_hash);
 417                 obd->obd_nid_hash = NULL;
 418         }
 419         if (obd->obd_nid_stats_hash) {
 420                 cfs_hash_putref(obd->obd_nid_stats_hash);
 421                 obd->obd_nid_stats_hash = NULL;
 422         }
 423         obd->obd_starting = 0;
 424         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 425         return err;
 426 }
 427
 428 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 429 {
 430         ENTRY;
 431
 432         if (obd->obd_set_up) {
 433                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 434                 RETURN(-EBUSY);
 435         }
 436
 437         cfs_spin_lock(&obd->obd_dev_lock);
 438         if (!obd->obd_attached) {
 439                 cfs_spin_unlock(&obd->obd_dev_lock);
 440                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 441                 RETURN(-ENODEV);
 442         }
 443         obd->obd_attached = 0;
 444         cfs_spin_unlock(&obd->obd_dev_lock);
 445
 446         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 447                obd->obd_name, obd->obd_uuid.uuid);
 448
 449         class_decref(obd, "attach", obd);
 450
 451         /* not strictly necessary, but cleans up eagerly */
 452         obd_zombie_impexp_cull();
 453
 454         RETURN(0);
 455 }
 456
 457 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 458 {
 459         int err = 0;
 460         char *flag;
 461         ENTRY;
 462
 463         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 464
 465         if (!obd->obd_set_up) {
 466                 CERROR("Device %d not setup\n", obd->obd_minor);
 467                 RETURN(-ENODEV);
 468         }
 469
 470         cfs_spin_lock(&obd->obd_dev_lock);
 471         if (obd->obd_stopping) {
 472                 cfs_spin_unlock(&obd->obd_dev_lock);
 473                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 474                 RETURN(-ENODEV);
 475         }
 476         /* Leave this on forever */
 477         obd->obd_stopping = 1;
 478         cfs_spin_unlock(&obd->obd_dev_lock);
 479
 480         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 481                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 482                         switch (*flag) {
 483                         case 'F':
 484                                 obd->obd_force = 1;
 485                                 break;
 486                         case 'A':
 487                                 LCONSOLE_WARN("Failing over %s\n",
 488                                               obd->obd_name);
 489                                 obd->obd_fail = 1;
 490                                 obd->obd_no_transno = 1;
 491                                 obd->obd_no_recov = 1;
 492                                 if (OBP(obd, iocontrol)) {
 493                                         obd_iocontrol(OBD_IOC_SYNC,
 494                                                       obd->obd_self_export,
 495                                                       0, NULL, NULL);
 496                                 }
 497                                 break;
 498                         default:
 499                                 CERROR("Unrecognised flag '%c'\n", *flag);
 500                         }
 501         }
 502
 503         LASSERT(obd->obd_self_export);
 504
 505         /* The three references that should be remaining are the
 506          * obd_self_export and the attach and setup references. */
 507         if (cfs_atomic_read(&obd->obd_refcount) > 3) {
 508                 /* refcounf - 3 might be the number of real exports
 509                    (excluding self export). But class_incref is called
 510                    by other things as well, so don't count on it. */
 511                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 512                        obd->obd_name, cfs_atomic_read(&obd->obd_refcount) - 3);
 513                 dump_exports(obd, 0);
 514                 class_disconnect_exports(obd);
 515         }
 516
 517         /* destroy an uuid-export hash body */
 518         if (obd->obd_uuid_hash) {
 519                 cfs_hash_putref(obd->obd_uuid_hash);
 520                 obd->obd_uuid_hash = NULL;
 521         }
 522
 523         /* destroy a nid-export hash body */
 524         if (obd->obd_nid_hash) {
 525                 cfs_hash_putref(obd->obd_nid_hash);
 526                 obd->obd_nid_hash = NULL;
 527         }
 528
 529         /* destroy a nid-stats hash body */
 530         if (obd->obd_nid_stats_hash) {
 531                 cfs_hash_putref(obd->obd_nid_stats_hash);
 532                 obd->obd_nid_stats_hash = NULL;
 533         }
 534
 535         /* Precleanup, we must make sure all exports get destroyed. */
 536         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 537         if (err)
 538                 CERROR("Precleanup %s returned %d\n",
 539                        obd->obd_name, err);
 540         class_decref(obd, "setup", obd);
 541         obd->obd_set_up = 0;
 542         RETURN(0);
 543 }
 544
 545 struct obd_device *class_incref(struct obd_device *obd,
 546                                 const char *scope, const void *source)
 547 {
 548         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 549         cfs_atomic_inc(&obd->obd_refcount);
 550         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 551                cfs_atomic_read(&obd->obd_refcount));
 552
 553         return obd;
 554 }
 555
 556 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 557 {
 558         int err;
 559         int refs;
 560
 561         cfs_spin_lock(&obd->obd_dev_lock);
 562         cfs_atomic_dec(&obd->obd_refcount);
 563         refs = cfs_atomic_read(&obd->obd_refcount);
 564         cfs_spin_unlock(&obd->obd_dev_lock);
 565         lu_ref_del(&obd->obd_reference, scope, source);
 566
 567         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 568
 569         if ((refs == 1) && obd->obd_stopping) {
 570                 /* All exports have been destroyed; there should
 571                    be no more in-progress ops by this point.*/
 572
 573                 cfs_spin_lock(&obd->obd_self_export->exp_lock);
 574                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
 575                 cfs_spin_unlock(&obd->obd_self_export->exp_lock);
 576
 577                 /* note that we'll recurse into class_decref again */
 578                 class_unlink_export(obd->obd_self_export);
 579                 return;
 580         }
 581
 582         if (refs == 0) {
 583                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 584                        obd->obd_name, obd->obd_uuid.uuid);
 585                 LASSERT(!obd->obd_attached);
 586                 if (obd->obd_stopping) {
 587                         /* If we're not stopping, we were never set up */
 588                         err = obd_cleanup(obd);
 589                         if (err)
 590                                 CERROR("Cleanup %s returned %d\n",
 591                                        obd->obd_name, err);
 592                 }
 593                 if (OBP(obd, detach)) {
 594                         err = OBP(obd, detach)(obd);
 595                         if (err)
 596                                 CERROR("Detach returned %d\n", err);
 597                 }
 598                 class_release_dev(obd);
 599         }
 600 }
 601
 602 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 603 {
 604         struct obd_import *imp;
 605         struct obd_uuid uuid;
 606         int rc;
 607         ENTRY;
 608
 609         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 610             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 611                 CERROR("invalid conn_uuid\n");
 612                 RETURN(-EINVAL);
 613         }
 614         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 615             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 616             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 617                 CERROR("can't add connection on non-client dev\n");
 618                 RETURN(-EINVAL);
 619         }
 620
 621         imp = obd->u.cli.cl_import;
 622         if (!imp) {
 623                 CERROR("try to add conn on immature client dev\n");
 624                 RETURN(-EINVAL);
 625         }
 626
 627         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 628         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 629
 630         RETURN(rc);
 631 }
 632
 633 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 634 {
 635         struct obd_import *imp;
 636         struct obd_uuid uuid;
 637         int rc;
 638         ENTRY;
 639
 640         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 641             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 642                 CERROR("invalid conn_uuid\n");
 643                 RETURN(-EINVAL);
 644         }
 645         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 646             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 647                 CERROR("can't del connection on non-client dev\n");
 648                 RETURN(-EINVAL);
 649         }
 650
 651         imp = obd->u.cli.cl_import;
 652         if (!imp) {
 653                 CERROR("try to del conn on immature client dev\n");
 654                 RETURN(-EINVAL);
 655         }
 656
 657         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 658         rc = obd_del_conn(imp, &uuid);
 659
 660         RETURN(rc);
 661 }
 662
 663 CFS_LIST_HEAD(lustre_profile_list);
 664
 665 struct lustre_profile *class_get_profile(const char * prof)
 666 {
 667         struct lustre_profile *lprof;
 668
 669         ENTRY;
 670         cfs_list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 671                 if (!strcmp(lprof->lp_profile, prof)) {
 672                         RETURN(lprof);
 673                 }
 674         }
 675         RETURN(NULL);
 676 }
 677
 678 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 679                       int mdclen, char *mdc)
 680 {
 681         struct lustre_profile *lprof;
 682         int err = 0;
 683         ENTRY;
 684
 685         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 686
 687         OBD_ALLOC(lprof, sizeof(*lprof));
 688         if (lprof == NULL)
 689                 RETURN(-ENOMEM);
 690         CFS_INIT_LIST_HEAD(&lprof->lp_list);
 691
 692         LASSERT(proflen == (strlen(prof) + 1));
 693         OBD_ALLOC(lprof->lp_profile, proflen);
 694         if (lprof->lp_profile == NULL)
 695                 GOTO(out, err = -ENOMEM);
 696         memcpy(lprof->lp_profile, prof, proflen);
 697
 698         LASSERT(osclen == (strlen(osc) + 1));
 699         OBD_ALLOC(lprof->lp_dt, osclen);
 700         if (lprof->lp_dt == NULL)
 701                 GOTO(out, err = -ENOMEM);
 702         memcpy(lprof->lp_dt, osc, osclen);
 703
 704         if (mdclen > 0) {
 705                 LASSERT(mdclen == (strlen(mdc) + 1));
 706                 OBD_ALLOC(lprof->lp_md, mdclen);
 707                 if (lprof->lp_md == NULL)
 708                         GOTO(out, err = -ENOMEM);
 709                 memcpy(lprof->lp_md, mdc, mdclen);
 710         }
 711
 712         cfs_list_add(&lprof->lp_list, &lustre_profile_list);
 713         RETURN(err);
 714
 715 out:
 716         if (lprof->lp_md)
 717                 OBD_FREE(lprof->lp_md, mdclen);
 718         if (lprof->lp_dt)
 719                 OBD_FREE(lprof->lp_dt, osclen);
 720         if (lprof->lp_profile)
 721                 OBD_FREE(lprof->lp_profile, proflen);
 722         OBD_FREE(lprof, sizeof(*lprof));
 723         RETURN(err);
 724 }
 725
 726 void class_del_profile(const char *prof)
 727 {
 728         struct lustre_profile *lprof;
 729         ENTRY;
 730
 731         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 732
 733         lprof = class_get_profile(prof);
 734         if (lprof) {
 735                 cfs_list_del(&lprof->lp_list);
 736                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 737                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 738                 if (lprof->lp_md)
 739                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 740                 OBD_FREE(lprof, sizeof *lprof);
 741         }
 742         EXIT;
 743 }
 744
 745 /* COMPAT_146 */
 746 void class_del_profiles(void)
 747 {
 748         struct lustre_profile *lprof, *n;
 749         ENTRY;
 750
 751         cfs_list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 752                 cfs_list_del(&lprof->lp_list);
 753                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 754                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 755                 if (lprof->lp_md)
 756                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 757                 OBD_FREE(lprof, sizeof *lprof);
 758         }
 759         EXIT;
 760 }
 761
 762 static int class_set_global(char *ptr, int val) {
 763         ENTRY;
 764
 765         if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
 766             at_min = val;
 767         else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
 768                 at_max = val;
 769         else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
 770                 at_extra = val;
 771         else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
 772                 at_early_margin = val;
 773         else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
 774                 at_history = val;
 775         else
 776                 RETURN(-EINVAL);
 777
 778         CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
 779
 780         RETURN(0);
 781 }
 782
 783
 784 /* We can't call ll_process_config directly because it lives in a module that
 785    must be loaded after this one. */
 786 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
 787
 788 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 789 {
 790         client_process_config = cpc;
 791 }
 792 EXPORT_SYMBOL(lustre_register_client_process_config);
 793
 794 int class_process_config(struct lustre_cfg *lcfg)
 795 {
 796         struct obd_device *obd;
 797         int err;
 798
 799         LASSERT(lcfg && !IS_ERR(lcfg));
 800         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
 801
 802         /* Commands that don't need a device */
 803         switch(lcfg->lcfg_command) {
 804         case LCFG_ATTACH: {
 805                 err = class_attach(lcfg);
 806                 GOTO(out, err);
 807         }
 808         case LCFG_ADD_UUID: {
 809                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
 810                        " (%s)\n", lustre_cfg_string(lcfg, 1),
 811                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
 812
 813                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
 814                 GOTO(out, err);
 815         }
 816         case LCFG_DEL_UUID: {
 817                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
 818                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
 819                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
 820
 821                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
 822                 GOTO(out, err);
 823         }
 824         case LCFG_MOUNTOPT: {
 825                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
 826                        lustre_cfg_string(lcfg, 1),
 827                        lustre_cfg_string(lcfg, 2),
 828                        lustre_cfg_string(lcfg, 3));
 829                 /* set these mount options somewhere, so ll_fill_super
 830                  * can find them. */
 831                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
 832                                         lustre_cfg_string(lcfg, 1),
 833                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
 834                                         lustre_cfg_string(lcfg, 2),
 835                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
 836                                         lustre_cfg_string(lcfg, 3));
 837                 GOTO(out, err);
 838         }
 839         case LCFG_DEL_MOUNTOPT: {
 840                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
 841                        lustre_cfg_string(lcfg, 1));
 842                 class_del_profile(lustre_cfg_string(lcfg, 1));
 843                 GOTO(out, err = 0);
 844         }
 845         case LCFG_SET_TIMEOUT: {
 846                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
 847                        obd_timeout, lcfg->lcfg_num);
 848                 obd_timeout = max(lcfg->lcfg_num, 1U);
 849                 GOTO(out, err = 0);
 850         }
 851         case LCFG_SET_LDLM_TIMEOUT: {
 852                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
 853                        ldlm_timeout, lcfg->lcfg_num);
 854                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
 855                 if (ldlm_timeout >= obd_timeout)
 856                         ldlm_timeout = max(obd_timeout / 3, 1U);
 857
 858                 GOTO(out, err = 0);
 859         }
 860         case LCFG_SET_UPCALL: {
 861                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
 862                 /* COMPAT_146 Don't fail on old configs */
 863                 GOTO(out, err = 0);
 864         }
 865         case LCFG_MARKER: {
 866                 struct cfg_marker *marker;
 867                 marker = lustre_cfg_buf(lcfg, 1);
 868                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
 869                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
 870                 GOTO(out, err = 0);
 871         }
 872         case LCFG_PARAM: {
 873                 char *tmp;
 874                 /* llite has no obd */
 875                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
 876                                        PARAM_LLITE, 0) == 0) &&
 877                     client_process_config) {
 878                         err = (*client_process_config)(lcfg);
 879                         GOTO(out, err);
 880                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
 881                                               PARAM_SYS, &tmp) == 0)) {
 882                         /* Global param settings */
 883                         err = class_set_global(tmp, lcfg->lcfg_num);
 884                         /* Note that since LCFG_PARAM is LCFG_REQUIRED, new
 885                            unknown globals would cause config to fail */
 886                         if (err)
 887                                 CWARN("Ignoring unknown param %s\n", tmp);
 888                         GOTO(out, 0);
 889                 }
 890
 891                 /* Fall through */
 892                 break;
 893         }
 894         }
 895
 896         /* Commands that require a device */
 897         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
 898         if (obd == NULL) {
 899                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
 900                         CERROR("this lcfg command requires a device name\n");
 901                 else
 902                         CERROR("no device for: %s\n",
 903                                lustre_cfg_string(lcfg, 0));
 904
 905                 GOTO(out, err = -EINVAL);
 906         }
 907
 908         switch(lcfg->lcfg_command) {
 909         case LCFG_SETUP: {
 910                 err = class_setup(obd, lcfg);
 911                 GOTO(out, err);
 912         }
 913         case LCFG_DETACH: {
 914                 err = class_detach(obd, lcfg);
 915                 GOTO(out, err = 0);
 916         }
 917         case LCFG_CLEANUP: {
 918                 err = class_cleanup(obd, lcfg);
 919                 GOTO(out, err = 0);
 920         }
 921         case LCFG_ADD_CONN: {
 922                 err = class_add_conn(obd, lcfg);
 923                 GOTO(out, err = 0);
 924         }
 925         case LCFG_DEL_CONN: {
 926                 err = class_del_conn(obd, lcfg);
 927                 GOTO(out, err = 0);
 928         }
 929         case LCFG_POOL_NEW: {
 930                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
 931                 GOTO(out, err = 0);
 932                 break;
 933         }
 934         case LCFG_POOL_ADD: {
 935                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
 936                                    lustre_cfg_string(lcfg, 3));
 937                 GOTO(out, err = 0);
 938                 break;
 939         }
 940         case LCFG_POOL_REM: {
 941                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
 942                                    lustre_cfg_string(lcfg, 3));
 943                 GOTO(out, err = 0);
 944                 break;
 945         }
 946         case LCFG_POOL_DEL: {
 947                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
 948                 GOTO(out, err = 0);
 949                 break;
 950         }
 951         default: {
 952                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
 953                 GOTO(out, err);
 954
 955         }
 956         }
 957 out:
 958         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
 959                 CWARN("Ignoring error %d on optional command %#x\n", err,
 960                       lcfg->lcfg_command);
 961                 err = 0;
 962         }
 963         return err;
 964 }
 965
 966 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 967                              struct lustre_cfg *lcfg, void *data)
 968 {
 969 #ifdef __KERNEL__
 970         struct lprocfs_vars *var;
 971         char *key, *sval;
 972         int i, keylen, vallen;
 973         int matched = 0, j = 0;
 974         int rc = 0;
 975         int skip = 0;
 976         ENTRY;
 977
 978         if (lcfg->lcfg_command != LCFG_PARAM) {
 979                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 980                 RETURN(-EINVAL);
 981         }
 982
 983         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
 984            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
 985            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
 986         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
 987                 key = lustre_cfg_buf(lcfg, i);
 988                 /* Strip off prefix */
 989                 class_match_param(key, prefix, &key);
 990                 sval = strchr(key, '=');
 991                 if (!sval || (*(sval + 1) == 0)) {
 992                         CERROR("Can't parse param %s (missing '=')\n", key);
 993                         /* rc = -EINVAL;        continue parsing other params */
 994                         continue;
 995                 }
 996                 keylen = sval - key;
 997                 sval++;
 998                 vallen = strlen(sval);
 999                 matched = 0;
1000                 j = 0;
1001                 /* Search proc entries */
1002                 while (lvars[j].name) {
1003                         var = &lvars[j];
1004                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1005                             keylen == strlen(var->name)) {
1006                                 matched++;
1007                                 rc = -EROFS;
1008                                 if (var->write_fptr) {
1009                                         mm_segment_t oldfs;
1010                                         oldfs = get_fs();
1011                                         set_fs(KERNEL_DS);
1012                                         rc = (var->write_fptr)(NULL, sval,
1013                                                                vallen, data);
1014                                         set_fs(oldfs);
1015                                 }
1016                                 break;
1017                         }
1018                         j++;
1019                 }
1020                 if (!matched) {
1021                         /* If the prefix doesn't match, return error so we
1022                            can pass it down the stack */
1023                         if (strnchr(key, keylen, '.'))
1024                             RETURN(-ENOSYS);
1025                         CERROR("%s: unknown param %s\n",
1026                                (char *)lustre_cfg_string(lcfg, 0), key);
1027                         /* rc = -EINVAL;        continue parsing other params */
1028                         skip++;
1029                 } else if (rc < 0) {
1030                         CERROR("writing proc entry %s err %d\n",
1031                                var->name, rc);
1032                         rc = 0;
1033                 } else {
1034                         LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
1035                                       lustre_cfg_string(lcfg, 0),
1036                                       (int)strlen(prefix) - 1, prefix,
1037                                       (int)(sval - key - 1), key, sval);
1038                 }
1039         }
1040
1041         if (rc > 0)
1042                 rc = 0;
1043         if (!rc && skip)
1044                 rc = skip;
1045         RETURN(rc);
1046 #else
1047         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1048         /* Don't throw config error */
1049         RETURN(0);
1050 #endif
1051 }
1052
1053 int class_config_dump_handler(struct llog_handle * handle,
1054                               struct llog_rec_hdr *rec, void *data);
1055
1056 #ifdef __KERNEL__
1057 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1058 #else
1059 #define lustre_check_exclusion(a,b)  0
1060 #endif
1061
1062 static int class_config_llog_handler(struct llog_handle * handle,
1063                                      struct llog_rec_hdr *rec, void *data)
1064 {
1065         struct config_llog_instance *clli = data;
1066         int cfg_len = rec->lrh_len;
1067         char *cfg_buf = (char*) (rec + 1);
1068         int rc = 0;
1069         ENTRY;
1070
1071         //class_config_dump_handler(handle, rec, data);
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, rc);
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                         lustre_swab_cfg_marker(marker, swab,
1095                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1096                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1097                                clli->cfg_flags, marker->cm_flags);
1098                         if (marker->cm_flags & CM_START) {
1099                                 /* all previous flags off */
1100                                 clli->cfg_flags = CFG_F_MARKER;
1101                                 if (marker->cm_flags & CM_SKIP) {
1102                                         clli->cfg_flags |= CFG_F_SKIP;
1103                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1104                                                marker->cm_step);
1105                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1106                                            (clli->cfg_sb &&
1107                                             lustre_check_exclusion(clli->cfg_sb,
1108                                                          marker->cm_tgtname))) {
1109                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1110                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1111                                                marker->cm_step);
1112                                 }
1113                         } else if (marker->cm_flags & CM_END) {
1114                                 clli->cfg_flags = 0;
1115                         }
1116                 }
1117                 /* A config command without a start marker before it is
1118                    illegal (post 146) */
1119                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1120                     !(clli->cfg_flags & CFG_F_MARKER) &&
1121                     (lcfg->lcfg_command != LCFG_MARKER)) {
1122                         CWARN("Config not inside markers, ignoring! "
1123                               "(inst: %s, uuid: %s, flags: %#x)\n",
1124                               clli->cfg_instance ? clli->cfg_instance : "<null>",
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 "
1147                                        "type from mds to mdt\n");
1148                                 typename[2] = 't';
1149                         }
1150                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1151                              strcmp(index, "type") == 0)) {
1152                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1153                                        "set this index to '0'\n");
1154                                 index[0] = '0';
1155                                 index[1] = 0;
1156                         }
1157                 }
1158
1159                 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
1160                     (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
1161                         /* Add inactive instead */
1162                         lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1163
1164                 lustre_cfg_bufs_init(&bufs, lcfg);
1165
1166                 if (clli && clli->cfg_instance &&
1167                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1168                         inst = 1;
1169                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1170                                 strlen(clli->cfg_instance) + 1;
1171                         OBD_ALLOC(inst_name, inst_len);
1172                         if (inst_name == NULL)
1173                                 GOTO(out, rc = -ENOMEM);
1174                         sprintf(inst_name, "%s-%s",
1175                                 lustre_cfg_string(lcfg, 0),
1176                                 clli->cfg_instance);
1177                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1178                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1179                                lcfg->lcfg_command, inst_name);
1180                 }
1181
1182                 /* we override the llog's uuid for clients, to insure they
1183                 are unique */
1184                 if (clli && clli->cfg_instance &&
1185                     lcfg->lcfg_command == LCFG_ATTACH) {
1186                         lustre_cfg_bufs_set_string(&bufs, 2,
1187                                                    clli->cfg_uuid.uuid);
1188                 }
1189                 /*
1190                  * sptlrpc config record, we expect 2 data segments:
1191                  *  [0]: fs_name/target_name,
1192                  *  [1]: rule string
1193                  * moving them to index [1] and [2], and insert MGC's
1194                  * obdname at index [0].
1195                  */
1196                 if (clli && clli->cfg_instance == NULL &&
1197                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1198                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1199                                             bufs.lcfg_buflen[1]);
1200                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1201                                             bufs.lcfg_buflen[0]);
1202                         lustre_cfg_bufs_set_string(&bufs, 0,
1203                                                    clli->cfg_obdname);
1204                 }
1205
1206                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1207
1208                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1209                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1210
1211                 /* XXX Hack to try to remain binary compatible with
1212                  * pre-newconfig logs */
1213                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1214                     (lcfg->lcfg_nid >> 32) == 0) {
1215                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1216
1217                         lcfg_new->lcfg_nid =
1218                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1219                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1220                               lcfg->lcfg_nal, addr,
1221                               libcfs_nid2str(lcfg_new->lcfg_nid));
1222                 } else {
1223                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1224                 }
1225
1226                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1227
1228                 rc = class_process_config(lcfg_new);
1229                 lustre_cfg_free(lcfg_new);
1230
1231                 if (inst)
1232                         OBD_FREE(inst_name, inst_len);
1233                 break;
1234         }
1235         default:
1236                 CERROR("Unknown llog record type %#x encountered\n",
1237                        rec->lrh_type);
1238                 break;
1239         }
1240 out:
1241         if (rc) {
1242                 CERROR("Err %d on cfg command:\n", rc);
1243                 class_config_dump_handler(handle, rec, data);
1244         }
1245         RETURN(rc);
1246 }
1247
1248 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1249                             struct config_llog_instance *cfg)
1250 {
1251         struct llog_process_cat_data cd = {0, 0};
1252         struct llog_handle *llh;
1253         int rc, rc2;
1254         ENTRY;
1255
1256         CDEBUG(D_INFO, "looking up llog %s\n", name);
1257         rc = llog_create(ctxt, &llh, NULL, name);
1258         if (rc)
1259                 RETURN(rc);
1260
1261         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1262         if (rc)
1263                 GOTO(parse_out, rc);
1264
1265         /* continue processing from where we last stopped to end-of-log */
1266         if (cfg)
1267                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1268         cd.lpcd_last_idx = 0;
1269
1270         rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1271
1272         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1273                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1274
1275         if (cfg)
1276                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1277
1278 parse_out:
1279         rc2 = llog_close(llh);
1280         if (rc == 0)
1281                 rc = rc2;
1282
1283         RETURN(rc);
1284 }
1285
1286 int class_config_dump_handler(struct llog_handle * handle,
1287                               struct llog_rec_hdr *rec, void *data)
1288 {
1289         int cfg_len = rec->lrh_len;
1290         char *cfg_buf = (char*) (rec + 1);
1291         char *outstr, *ptr, *end;
1292         int rc = 0;
1293         ENTRY;
1294
1295         OBD_ALLOC(outstr, 256);
1296         end = outstr + 256;
1297         ptr = outstr;
1298         if (!outstr) {
1299                 RETURN(-ENOMEM);
1300         }
1301         if (rec->lrh_type == OBD_CFG_REC) {
1302                 struct lustre_cfg *lcfg;
1303                 int i;
1304
1305                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1306                 if (rc)
1307                         GOTO(out, rc);
1308                 lcfg = (struct lustre_cfg *)cfg_buf;
1309
1310                 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1311                                 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 ",
1318                                         lcfg->lcfg_num);
1319                 }
1320                 if (lcfg->lcfg_nid) {
1321                         ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1322                                         libcfs_nid2str(lcfg->lcfg_nid),
1323                                         lcfg->lcfg_nid);
1324                 }
1325                 if (lcfg->lcfg_command == LCFG_MARKER) {
1326                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1327                         ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1328                                         marker->cm_step, marker->cm_flags,
1329                                         marker->cm_tgtname, marker->cm_comment);
1330                 } else {
1331                         for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1332                                 ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1333                                                 lustre_cfg_string(lcfg, i));
1334                         }
1335                 }
1336                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1337         } else {
1338                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1339                 rc = -EINVAL;
1340         }
1341 out:
1342         OBD_FREE(outstr, 256);
1343         RETURN(rc);
1344 }
1345
1346 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1347                            struct config_llog_instance *cfg)
1348 {
1349         struct llog_handle *llh;
1350         int rc, rc2;
1351         ENTRY;
1352
1353         LCONSOLE_INFO("Dumping config log %s\n", name);
1354
1355         rc = llog_create(ctxt, &llh, NULL, name);
1356         if (rc)
1357                 RETURN(rc);
1358
1359         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1360         if (rc)
1361                 GOTO(parse_out, rc);
1362
1363         rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1364 parse_out:
1365         rc2 = llog_close(llh);
1366         if (rc == 0)
1367                 rc = rc2;
1368
1369         LCONSOLE_INFO("End config log %s\n", name);
1370         RETURN(rc);
1371
1372 }
1373
1374 /* Cleanup and detach */
1375 int class_manual_cleanup(struct obd_device *obd)
1376 {
1377         char                    flags[3] = "";
1378         struct lustre_cfg      *lcfg;
1379         struct lustre_cfg_bufs  bufs;
1380         int                     rc;
1381         ENTRY;
1382
1383         if (!obd) {
1384                 CERROR("empty cleanup\n");
1385                 RETURN(-EALREADY);
1386         }
1387
1388         if (obd->obd_force)
1389                 strcat(flags, "F");
1390         if (obd->obd_fail)
1391                 strcat(flags, "A");
1392
1393         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1394                obd->obd_name, flags);
1395
1396         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1397         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1398         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1399         if (!lcfg)
1400                 RETURN(-ENOMEM);
1401
1402         rc = class_process_config(lcfg);
1403         if (rc) {
1404                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1405                 GOTO(out, rc);
1406         }
1407
1408         /* the lcfg is almost the same for both ops */
1409         lcfg->lcfg_command = LCFG_DETACH;
1410         rc = class_process_config(lcfg);
1411         if (rc)
1412                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1413 out:
1414         lustre_cfg_free(lcfg);
1415         RETURN(rc);
1416 }
1417
1418 /*
1419  * uuid<->export lustre hash operations
1420  */
1421
1422 static unsigned
1423 uuid_hash(cfs_hash_t *hs,  void *key, unsigned mask)
1424 {
1425         return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
1426                                   sizeof(((struct obd_uuid *)key)->uuid), mask);
1427 }
1428
1429 static void *
1430 uuid_key(cfs_hlist_node_t *hnode)
1431 {
1432         struct obd_export *exp;
1433
1434         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1435
1436         RETURN(&exp->exp_client_uuid);
1437 }
1438
1439 /*
1440  * NOTE: It is impossible to find an export that is in failed
1441  *       state with this function
1442  */
1443 static int
1444 uuid_compare(void *key, cfs_hlist_node_t *hnode)
1445 {
1446         struct obd_export *exp;
1447
1448         LASSERT(key);
1449         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1450
1451         RETURN(obd_uuid_equals((struct obd_uuid *)key,&exp->exp_client_uuid) &&
1452                !exp->exp_failed);
1453 }
1454
1455 static void *
1456 uuid_export_get(cfs_hlist_node_t *hnode)
1457 {
1458         struct obd_export *exp;
1459
1460         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1461         class_export_get(exp);
1462
1463         RETURN(exp);
1464 }
1465
1466 static void *
1467 uuid_export_put(cfs_hlist_node_t *hnode)
1468 {
1469         struct obd_export *exp;
1470
1471         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1472         class_export_put(exp);
1473
1474         RETURN(exp);
1475 }
1476
1477 static cfs_hash_ops_t uuid_hash_ops = {
1478         .hs_hash    = uuid_hash,
1479         .hs_key     = uuid_key,
1480         .hs_compare = uuid_compare,
1481         .hs_get     = uuid_export_get,
1482         .hs_put     = uuid_export_put,
1483 };
1484
1485
1486 /*
1487  * nid<->export hash operations
1488  */
1489
1490 static unsigned
1491 nid_hash(cfs_hash_t *hs,  void *key, unsigned mask)
1492 {
1493         return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
1494 }
1495
1496 static void *
1497 nid_key(cfs_hlist_node_t *hnode)
1498 {
1499         struct obd_export *exp;
1500
1501         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
1502
1503         RETURN(&exp->exp_connection->c_peer.nid);
1504 }
1505
1506 /*
1507  * NOTE: It is impossible to find an export that is in failed
1508  *       state with this function
1509  */
1510 static int
1511 nid_compare(void *key, cfs_hlist_node_t *hnode)
1512 {
1513         struct obd_export *exp;
1514
1515         LASSERT(key);
1516         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
1517
1518         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1519                !exp->exp_failed);
1520 }
1521
1522 static void *
1523 nid_export_get(cfs_hlist_node_t *hnode)
1524 {
1525         struct obd_export *exp;
1526
1527         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
1528         class_export_get(exp);
1529
1530         RETURN(exp);
1531 }
1532
1533 static void *
1534 nid_export_put(cfs_hlist_node_t *hnode)
1535 {
1536         struct obd_export *exp;
1537
1538         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
1539         class_export_put(exp);
1540
1541         RETURN(exp);
1542 }
1543
1544 static cfs_hash_ops_t nid_hash_ops = {
1545         .hs_hash    = nid_hash,
1546         .hs_key     = nid_key,
1547         .hs_compare = nid_compare,
1548         .hs_get     = nid_export_get,
1549         .hs_put     = nid_export_put,
1550 };
1551
1552
1553 /*
1554  * nid<->nidstats hash operations
1555  */
1556
1557 static void *
1558 nidstats_key(cfs_hlist_node_t *hnode)
1559 {
1560         struct nid_stat *ns;
1561
1562         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
1563
1564         RETURN(&ns->nid);
1565 }
1566
1567 static int
1568 nidstats_compare(void *key, cfs_hlist_node_t *hnode)
1569 {
1570         RETURN(*(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key);
1571 }
1572
1573 static void *
1574 nidstats_get(cfs_hlist_node_t *hnode)
1575 {
1576         struct nid_stat *ns;
1577
1578         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
1579         nidstat_getref(ns);
1580
1581         RETURN(ns);
1582 }
1583
1584 static void *
1585 nidstats_put(cfs_hlist_node_t *hnode)
1586 {
1587         struct nid_stat *ns;
1588
1589         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
1590         nidstat_putref(ns);
1591
1592         RETURN(ns);
1593 }
1594
1595 static cfs_hash_ops_t nid_stat_hash_ops = {
1596         .hs_hash    = nid_hash,
1597         .hs_key     = nidstats_key,
1598         .hs_compare = nidstats_compare,
1599         .hs_get     = nidstats_get,
1600         .hs_put     = nidstats_put,
1601 };