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  *  Copyright (c) 2001-2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  * Config API
  22  *
  23  */
  24
  25 #define DEBUG_SUBSYSTEM S_CLASS
  26 #ifdef __KERNEL__
  27 #include <linux/kmod.h>   /* for request_module() */
  28 #include <linux/module.h>
  29 #include <linux/obd_class.h>
  30 #include <linux/random.h>
  31 #include <linux/slab.h>
  32 #include <linux/pagemap.h>
  33 #else
  34 #include <liblustre.h>
  35 #include <linux/obd_class.h>
  36 #include <linux/obd.h>
  37 #endif
  38 #include <linux/lustre_log.h>
  39 #include <linux/lprocfs_status.h>
  40 #include <portals/list.h>
  41
  42
  43 /* Create a new device and set the type, name and uuid.  If
  44  * successful, the new device can be accessed by either name or uuid.
  45  */
  46 static int class_attach(struct lustre_cfg *lcfg)
  47 {
  48         struct obd_type *type;
  49         struct obd_device *obd;
  50         char *typename, *name, *uuid;
  51         int rc, len, cleanup_phase = 0;
  52
  53         if (!lcfg->lcfg_inllen1 || !lcfg->lcfg_inlbuf1) {
  54                 CERROR("No type passed!\n");
  55                 RETURN(-EINVAL);
  56         }
  57         if (lcfg->lcfg_inlbuf1[lcfg->lcfg_inllen1 - 1] != 0) {
  58                 CERROR("Type not nul terminated!\n");
  59                 RETURN(-EINVAL);
  60         }
  61         typename = lcfg->lcfg_inlbuf1;
  62
  63         if (!lcfg->lcfg_dev_namelen || !lcfg->lcfg_dev_name) {
  64                 CERROR("No name passed!\n");
  65                 RETURN(-EINVAL);
  66         }
  67         if (lcfg->lcfg_dev_name[lcfg->lcfg_dev_namelen - 1] != 0) {
  68                 CERROR("Name not nul terminated!\n");
  69                 RETURN(-EINVAL);
  70         }
  71         name = lcfg->lcfg_dev_name;
  72
  73         if (!lcfg->lcfg_inllen2 || !lcfg->lcfg_inlbuf2) {
  74                 CERROR("No UUID passed!\n");
  75                 RETURN(-EINVAL);
  76         }
  77         if (lcfg->lcfg_inlbuf2[lcfg->lcfg_inllen2 - 1] != 0) {
  78                 CERROR("UUID not nul terminated!\n");
  79                 RETURN(-EINVAL);
  80         }
  81         uuid = lcfg->lcfg_inlbuf2;
  82
  83         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
  84                MKSTR(lcfg->lcfg_inlbuf1),
  85                MKSTR(lcfg->lcfg_dev_name), MKSTR(lcfg->lcfg_inlbuf2));
  86
  87         /* find the type */
  88         type = class_get_type(typename);
  89         if (!type) {
  90                 CERROR("OBD: unknown type: %s\n", typename);
  91                 RETURN(-EINVAL);
  92         }
  93         cleanup_phase = 1;  /* class_put_type */
  94
  95         obd = class_name2obd(name);
  96         if (obd != NULL) {
  97                 CERROR("obd %s already attached\n", name);
  98                 GOTO(out, rc = -EEXIST);
  99         }
 100
 101         obd = class_newdev(type);
 102         if (obd == NULL)
 103                 GOTO(out, rc = -EINVAL);
 104
 105         cleanup_phase = 2;  /* class_release_dev */
 106
 107         INIT_LIST_HEAD(&obd->obd_exports);
 108         obd->obd_num_exports = 0;
 109         spin_lock_init(&obd->obd_dev_lock);
 110         spin_lock_init(&obd->obd_osfs_lock);
 111         obd->obd_osfs_age = jiffies - 1000 * HZ;
 112         init_waitqueue_head(&obd->obd_refcount_waitq);
 113
 114         /* XXX belongs in setup not attach  */
 115         /* recovery data */
 116         init_timer(&obd->obd_recovery_timer);
 117         spin_lock_init(&obd->obd_processing_task_lock);
 118         init_waitqueue_head(&obd->obd_next_transno_waitq);
 119         INIT_LIST_HEAD(&obd->obd_recovery_queue);
 120         INIT_LIST_HEAD(&obd->obd_delayed_reply_queue);
 121
 122         spin_lock_init(&obd->obd_uncommitted_replies_lock);
 123         INIT_LIST_HEAD(&obd->obd_uncommitted_replies);
 124
 125         len = strlen(name) + 1;
 126         OBD_ALLOC(obd->obd_name, len);
 127         if (!obd->obd_name)
 128                 GOTO(out, rc = -ENOMEM);
 129         memcpy(obd->obd_name, name, len);
 130
 131         cleanup_phase = 3; /* free obd_name */
 132
 133         len = strlen(uuid);
 134         if (len >= sizeof(obd->obd_uuid)) {
 135                 CERROR("uuid must be < "LPSZ" bytes long\n",
 136                        sizeof(obd->obd_uuid));
 137                 GOTO(out, rc = -EINVAL);
 138         }
 139         memcpy(obd->obd_uuid.uuid, uuid, len);
 140
 141         /* do the attach */
 142         if (OBP(obd, attach)) {
 143                 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
 144                 if (rc)
 145                         GOTO(out, rc = -EINVAL);
 146         }
 147
 148         obd->obd_attached = 1;
 149         type->typ_refcnt++;
 150         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s\n",
 151                obd->obd_minor, typename);
 152         RETURN(0);
 153  out:
 154         switch (cleanup_phase) {
 155         case 3:
 156                 OBD_FREE(obd->obd_name, strlen(obd->obd_name) + 1);
 157         case 2:
 158                 class_release_dev(obd);
 159         case 1:
 160                 class_put_type(type);
 161                 obd->obd_type = NULL;
 162         }
 163         return rc;
 164 }
 165
 166 static int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 167 {
 168         int err = 0;
 169         struct obd_export *exp;
 170         ENTRY;
 171
 172         LASSERT(obd == (obd_dev + obd->obd_minor));
 173
 174         /* have we attached a type to this device? */
 175         if (!obd->obd_attached) {
 176                 CERROR("Device %d not attached\n", obd->obd_minor);
 177                 RETURN(-ENODEV);
 178         }
 179
 180         /* has this been done already? */
 181         if (obd->obd_set_up) {
 182                 CERROR("Device %d already setup (type %s)\n",
 183                        obd->obd_minor, obd->obd_type->typ_name);
 184                 RETURN(-EBUSY);
 185         }
 186
 187         atomic_set(&obd->obd_refcount, 0);
 188
 189         exp = class_new_export(obd);
 190         if (exp == NULL)
 191                 RETURN(err);
 192         memcpy(&exp->exp_client_uuid, &obd->obd_uuid,
 193                sizeof(exp->exp_client_uuid));
 194         obd->obd_self_export = exp;
 195         class_export_put(exp);
 196
 197         err = obd_setup(obd, sizeof(*lcfg), lcfg);
 198         if (err)
 199                 GOTO(err_exp, err);
 200
 201         obd->obd_type->typ_refcnt++;
 202         obd->obd_set_up = 1;
 203
 204         RETURN(err);
 205
 206 err_exp:
 207         class_unlink_export(obd->obd_self_export);
 208         obd->obd_self_export = NULL;
 209         RETURN(err);
 210 }
 211
 212 static int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 213 {
 214         int err = 0;
 215
 216         ENTRY;
 217         if (obd->obd_set_up) {
 218                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 219                 RETURN(-EBUSY);
 220         }
 221         if (!obd->obd_attached) {
 222                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 223                 RETURN(-ENODEV);
 224         }
 225         if (OBP(obd, detach))
 226                 err = OBP(obd,detach)(obd);
 227
 228         if (obd->obd_name) {
 229                 OBD_FREE(obd->obd_name, strlen(obd->obd_name)+1);
 230                 obd->obd_name = NULL;
 231         } else {
 232                 CERROR("device %d: no name at detach\n", obd->obd_minor);
 233         }
 234
 235         obd->obd_attached = 0;
 236         obd->obd_type->typ_refcnt--;
 237         class_put_type(obd->obd_type);
 238         class_release_dev(obd);
 239         RETURN(err);
 240 }
 241
 242 static void dump_exports(struct obd_device *obd)
 243 {
 244         struct obd_export *exp, *n;
 245
 246         list_for_each_entry_safe(exp, n, &obd->obd_exports, exp_obd_chain) {
 247                 struct ptlrpc_reply_state *rs;
 248                 struct ptlrpc_reply_state *first_reply = NULL;
 249                 int                        nreplies = 0;
 250
 251                 list_for_each_entry (rs, &exp->exp_outstanding_replies,
 252                                      rs_exp_list) {
 253                         if (nreplies == 0)
 254                                 first_reply = rs;
 255                         nreplies++;
 256                 }
 257
 258                 CERROR("%s: %p %s %d %d %d: %p %s\n",
 259                        obd->obd_name, exp, exp->exp_client_uuid.uuid,
 260                        atomic_read(&exp->exp_refcount),
 261                        exp->exp_failed, nreplies, first_reply,
 262                        nreplies > 3 ? "..." : "");
 263         }
 264 }
 265
 266 static int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 267 {
 268         int flags = 0;
 269         int err = 0;
 270         char *flag;
 271
 272         ENTRY;
 273         if (!obd->obd_set_up) {
 274                 CERROR("Device %d not setup\n", obd->obd_minor);
 275                 RETURN(-ENODEV);
 276         }
 277
 278         if (lcfg->lcfg_inlbuf1) {
 279                 for (flag = lcfg->lcfg_inlbuf1; *flag != 0; flag++)
 280                         switch (*flag) {
 281                         case 'F':
 282                                 flags |= OBD_OPT_FORCE;
 283                                 break;
 284                         case 'A':
 285                                 flags |= OBD_OPT_FAILOVER;
 286                                 break;
 287                         default:
 288                                 CERROR("unrecognised flag '%c'\n",
 289                                        *flag);
 290                         }
 291         }
 292
 293         /* The one reference that should be remaining is the
 294          * obd_self_export */
 295         if (atomic_read(&obd->obd_refcount) <= 1 ||
 296             flags & OBD_OPT_FORCE) {
 297                 /* this will stop new connections, and need to
 298                    do it before class_disconnect_exports() */
 299                 obd->obd_stopping = 1;
 300         }
 301
 302         if (atomic_read(&obd->obd_refcount) > 1) {
 303                 struct l_wait_info lwi = LWI_TIMEOUT_INTR(1 * HZ, NULL,
 304                                                           NULL, NULL);
 305                 int rc;
 306
 307                 if (!(flags & OBD_OPT_FORCE)) {
 308                         CERROR("OBD device %d (%p,%s) has refcount %d\n",
 309                                obd->obd_minor, obd, obd->obd_name,
 310                                atomic_read(&obd->obd_refcount));
 311                         dump_exports(obd);
 312                         GOTO(out, err = -EBUSY);
 313                 }
 314                 class_disconnect_exports(obd, flags);
 315                 CDEBUG(D_IOCTL,
 316                        "%s: waiting for obd refs to go away: %d\n",
 317                        obd->obd_name, atomic_read(&obd->obd_refcount));
 318
 319                 rc = l_wait_event(obd->obd_refcount_waitq,
 320                                   atomic_read(&obd->obd_refcount) < 2, &lwi);
 321                 if (rc == 0) {
 322                         LASSERT(atomic_read(&obd->obd_refcount) == 1);
 323                 } else {
 324                         CERROR("wait cancelled cleaning anyway. "
 325                                "refcount: %d\n",
 326                                atomic_read(&obd->obd_refcount));
 327                         dump_exports(obd);
 328                 }
 329                 CDEBUG(D_IOCTL, "%s: awake, now finishing cleanup\n",
 330                        obd->obd_name);
 331         }
 332
 333         if (obd->obd_self_export) {
 334                 err = obd_precleanup(obd, flags);
 335                 if (err)
 336                         GOTO(out, err);
 337                 class_unlink_export(obd->obd_self_export);
 338                 obd->obd_self_export = NULL;
 339         }
 340
 341         err = obd_cleanup(obd, flags);
 342 out:
 343         if (!err) {
 344                 obd->obd_set_up = obd->obd_stopping = 0;
 345                 obd->obd_type->typ_refcnt--;
 346                 /* XXX this should be an LASSERT */
 347                 if (atomic_read(&obd->obd_refcount) > 0) {
 348                         CERROR("%s (%p) still has refcount %d after "
 349                                "cleanup.\n", obd->obd_name, obd,
 350                                atomic_read(&obd->obd_refcount));
 351                         dump_exports(obd);
 352                 }
 353         }
 354
 355         RETURN(err);
 356 }
 357
 358 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 359 {
 360         struct obd_import *imp;
 361         struct obd_uuid uuid;
 362         int priority, rc;
 363         ENTRY;
 364
 365         if (lcfg->lcfg_inllen1 <= 0 ||
 366             lcfg->lcfg_inllen1 > sizeof(struct obd_uuid)) {
 367                 CERROR("invalid conn_uuid\n");
 368                 RETURN(-EINVAL);
 369         }
 370         if (lcfg->lcfg_inllen2 != sizeof(int)) {
 371                 CERROR("invalid priority\n");
 372                 RETURN(-EINVAL);
 373         }
 374         if (strcmp(obd->obd_type->typ_name, "mdc") &&
 375             strcmp(obd->obd_type->typ_name, "osc")) {
 376                 CERROR("can't add connection on non-client dev\n");
 377                 RETURN(-EINVAL);
 378         }
 379
 380         imp = obd->u.cli.cl_import;
 381         if (!imp) {
 382                 CERROR("try to add conn on immature client dev\n");
 383                 RETURN(-EINVAL);
 384         }
 385
 386         obd_str2uuid(&uuid, lcfg->lcfg_inlbuf1);
 387         priority = *((int*) lcfg->lcfg_inlbuf2);
 388         rc = obd_add_conn(imp, &uuid, priority);
 389
 390         RETURN(rc);
 391 }
 392 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 393 {
 394         struct obd_import *imp;
 395         struct obd_uuid uuid;
 396         int rc;
 397         ENTRY;
 398
 399         if (lcfg->lcfg_inllen1 <= 0 ||
 400             lcfg->lcfg_inllen1 > sizeof(struct obd_uuid)) {
 401                 CERROR("invalid conn_uuid\n");
 402                 RETURN(-EINVAL);
 403         }
 404         if (strcmp(obd->obd_type->typ_name, "mdc") &&
 405             strcmp(obd->obd_type->typ_name, "osc")) {
 406                 CERROR("can't add connection on non-client dev\n");
 407                 RETURN(-EINVAL);
 408         }
 409
 410         imp = obd->u.cli.cl_import;
 411         if (!imp) {
 412                 CERROR("try to del conn on immature client dev\n");
 413                 RETURN(-EINVAL);
 414         }
 415
 416         obd_str2uuid(&uuid, lcfg->lcfg_inlbuf1);
 417         rc = obd_del_conn(imp, &uuid);
 418
 419         RETURN(rc);
 420 }
 421
 422 LIST_HEAD(lustre_profile_list);
 423
 424 struct lustre_profile *class_get_profile(char * prof)
 425 {
 426         struct lustre_profile *lprof;
 427
 428         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 429                 if (!strcmp(lprof->lp_profile, prof)) {
 430                         RETURN(lprof);
 431                 }
 432         }
 433         RETURN(NULL);
 434 }
 435
 436 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 437                       int mdclen, char *mdc)
 438 {
 439         struct lustre_profile *lprof;
 440         int err = 0;
 441
 442         OBD_ALLOC(lprof, sizeof(*lprof));
 443         if (lprof == NULL)
 444                 GOTO(out, err = -ENOMEM);
 445         INIT_LIST_HEAD(&lprof->lp_list);
 446
 447         LASSERT(proflen == (strlen(prof) + 1));
 448         OBD_ALLOC(lprof->lp_profile, proflen);
 449         if (lprof->lp_profile == NULL)
 450                 GOTO(out, err = -ENOMEM);
 451         memcpy(lprof->lp_profile, prof, proflen);
 452
 453         LASSERT(osclen == (strlen(osc) + 1));
 454         OBD_ALLOC(lprof->lp_osc, osclen);
 455         if (lprof->lp_profile == NULL)
 456                 GOTO(out, err = -ENOMEM);
 457         memcpy(lprof->lp_osc, osc, osclen);
 458
 459         if (mdclen > 0) {
 460                 LASSERT(mdclen == (strlen(mdc) + 1));
 461                 OBD_ALLOC(lprof->lp_mdc, mdclen);
 462                 if (lprof->lp_mdc == NULL)
 463                         GOTO(out, err = -ENOMEM);
 464                 memcpy(lprof->lp_mdc, mdc, mdclen);
 465         }
 466
 467         list_add(&lprof->lp_list, &lustre_profile_list);
 468
 469 out:
 470         RETURN(err);
 471 }
 472
 473 void class_del_profile(char *prof)
 474 {
 475         struct lustre_profile *lprof;
 476
 477         lprof = class_get_profile(prof);
 478         if (lprof) {
 479                 list_del(&lprof->lp_list);
 480                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 481                 OBD_FREE(lprof->lp_osc, strlen(lprof->lp_osc) + 1);
 482                 if (lprof->lp_mdc)
 483                         OBD_FREE(lprof->lp_mdc, strlen(lprof->lp_mdc) + 1);
 484                 OBD_FREE(lprof, sizeof *lprof);
 485         }
 486 }
 487
 488 int class_process_config(struct lustre_cfg *lcfg)
 489 {
 490         struct obd_device *obd;
 491         char str[PTL_NALFMT_SIZE];
 492         int err;
 493         ENTRY;
 494
 495         LASSERT(lcfg && !IS_ERR(lcfg));
 496
 497         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
 498
 499         /* Commands that don't need a device */
 500         switch(lcfg->lcfg_command) {
 501         case LCFG_ATTACH: {
 502                 err = class_attach(lcfg);
 503                 GOTO(out, err);
 504         }
 505         case LCFG_ADD_UUID: {
 506                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
 507                        " (%s), nal %d\n", lcfg->lcfg_inlbuf1, lcfg->lcfg_nid,
 508                        portals_nid2str(lcfg->lcfg_nal, lcfg->lcfg_nid, str),
 509                        lcfg->lcfg_nal);
 510
 511                 err = class_add_uuid(lcfg->lcfg_inlbuf1, lcfg->lcfg_nid,
 512                                      lcfg->lcfg_nal);
 513                 GOTO(out, err);
 514         }
 515         case LCFG_DEL_UUID: {
 516                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
 517                        lcfg->lcfg_inlbuf1 == NULL ? "<all uuids>" :
 518                        lcfg->lcfg_inlbuf1);
 519
 520                 err = class_del_uuid(lcfg->lcfg_inlbuf1);
 521                 GOTO(out, err);
 522         }
 523         case LCFG_MOUNTOPT: {
 524                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
 525                        lcfg->lcfg_inlbuf1, lcfg->lcfg_inlbuf2,
 526                        lcfg->lcfg_inlbuf3);
 527                 /* set these mount options somewhere, so ll_fill_super
 528                  * can find them. */
 529                 err = class_add_profile(lcfg->lcfg_inllen1, lcfg->lcfg_inlbuf1,
 530                                         lcfg->lcfg_inllen2, lcfg->lcfg_inlbuf2,
 531                                         lcfg->lcfg_inllen3, lcfg->lcfg_inlbuf3);
 532                 GOTO(out, err);
 533         }
 534         case LCFG_DEL_MOUNTOPT: {
 535                 CDEBUG(D_IOCTL, "mountopt: profile %s\n", lcfg->lcfg_inlbuf1);
 536                 /* set these mount options somewhere, so ll_fill_super
 537                  * can find them. */
 538                 class_del_profile(lcfg->lcfg_inlbuf1);
 539                 GOTO(out, err = 0);
 540         }
 541         case LCFG_SET_TIMEOUT: {
 542                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
 543                        obd_timeout,
 544                        lcfg->lcfg_num);
 545                 obd_timeout = lcfg->lcfg_num;
 546                 GOTO(out, err = 0);
 547         }
 548         case LCFG_SET_UPCALL: {
 549                 CDEBUG(D_IOCTL, "setting lustre ucpall to: %s\n",
 550                        lcfg->lcfg_inlbuf1);
 551                 if (lcfg->lcfg_inllen1 > sizeof obd_lustre_upcall)
 552                         GOTO(out, err = -EINVAL);
 553                 memcpy(obd_lustre_upcall, lcfg->lcfg_inlbuf1,
 554                        lcfg->lcfg_inllen1);
 555                 GOTO(out, err = 0);
 556         }
 557         }
 558
 559         /* Commands that require a device */
 560         obd = class_name2obd(lcfg->lcfg_dev_name);
 561         if (obd == NULL) {
 562                 if (lcfg->lcfg_dev_name == NULL)
 563                         CERROR("this lcfg command requires a device name\n");
 564                 else
 565                         CERROR("no device for: %s\n", lcfg->lcfg_dev_name);
 566
 567                 GOTO(out, err = -EINVAL);
 568         }
 569
 570         switch(lcfg->lcfg_command) {
 571         case LCFG_SETUP: {
 572                 err = class_setup(obd, lcfg);
 573                 GOTO(out, err);
 574         }
 575         case LCFG_DETACH: {
 576                 err = class_detach(obd, lcfg);
 577                 GOTO(out, err = 0);
 578         }
 579         case LCFG_CLEANUP: {
 580                 err = class_cleanup(obd, lcfg);
 581                 GOTO(out, err = 0);
 582         }
 583         case LCFG_ADD_CONN: {
 584                 err = class_add_conn(obd, lcfg);
 585                 GOTO(out, err = 0);
 586         }
 587         case LCFG_DEL_CONN: {
 588                 err = class_del_conn(obd, lcfg);
 589                 GOTO(out, err = 0);
 590         }
 591         default: {
 592                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
 593                 GOTO(out, err);
 594
 595         }
 596         }
 597 out:
 598         RETURN(err);
 599 }
 600
 601 static int class_config_parse_handler(struct llog_handle * handle,
 602                                       struct llog_rec_hdr *rec, void *data)
 603 {
 604         struct config_llog_instance *cfg = data;
 605         int cfg_len = rec->lrh_len;
 606         char *cfg_buf = (char*) (rec + 1);
 607         int rc = 0;
 608         ENTRY;
 609
 610         if (rec->lrh_type == OBD_CFG_REC) {
 611                 char *buf;
 612                 struct lustre_cfg *lcfg;
 613                 char *old_name = NULL;
 614                 int old_len = 0;
 615                 char *old_uuid = NULL;
 616                 int old_uuid_len = 0;
 617                 char *inst_name = NULL;
 618                 int inst_len = 0;
 619
 620                 rc = lustre_cfg_getdata(&buf, cfg_len, cfg_buf, 1);
 621                 if (rc)
 622                         GOTO(out, rc);
 623                 lcfg = (struct lustre_cfg* ) buf;
 624
 625                 if (cfg && cfg->cfg_instance && lcfg->lcfg_dev_name) {
 626                         inst_len = strlen(lcfg->lcfg_dev_name) +
 627                                 strlen(cfg->cfg_instance) + 2;
 628                         OBD_ALLOC(inst_name, inst_len);
 629                         if (inst_name == NULL)
 630                                 GOTO(out, rc = -ENOMEM);
 631                         sprintf(inst_name, "%s-%s", lcfg->lcfg_dev_name,
 632                                 cfg->cfg_instance);
 633                         old_name = lcfg->lcfg_dev_name;
 634                         old_len = lcfg->lcfg_dev_namelen;
 635                         lcfg->lcfg_dev_name = inst_name;
 636                         lcfg->lcfg_dev_namelen = strlen(inst_name) + 1;
 637                 }
 638
 639                 if (cfg && lcfg->lcfg_command == LCFG_ATTACH) {
 640                         old_uuid = lcfg->lcfg_inlbuf2;
 641                         old_uuid_len = lcfg->lcfg_inllen2;
 642
 643                         lcfg->lcfg_inlbuf2 = (char*)&cfg->cfg_uuid.uuid;
 644                         lcfg->lcfg_inllen2 = sizeof(cfg->cfg_uuid);
 645                 }
 646
 647                 rc = class_process_config(lcfg);
 648
 649                 if (old_name) {
 650                         lcfg->lcfg_dev_name = old_name;
 651                         lcfg->lcfg_dev_namelen = old_len;
 652                         OBD_FREE(inst_name, inst_len);
 653                 }
 654
 655                 if (old_uuid) {
 656                         lcfg->lcfg_inlbuf2 = old_uuid;
 657                         lcfg->lcfg_inllen2 = old_uuid_len;
 658                 }
 659
 660                 lustre_cfg_freedata(buf, cfg_len);
 661         } else if (rec->lrh_type == PTL_CFG_REC) {
 662                 struct portals_cfg *pcfg = (struct portals_cfg *)cfg_buf;
 663                 if (pcfg->pcfg_command == NAL_CMD_REGISTER_MYNID &&
 664                     cfg->cfg_local_nid != PTL_NID_ANY) {
 665                         pcfg->pcfg_nid = cfg->cfg_local_nid;
 666                 }
 667
 668                 rc = libcfs_nal_cmd(pcfg);
 669         } else {
 670                 CERROR("unrecognized record type: 0x%x\n", rec->lrh_type);
 671         }
 672 out:
 673         RETURN(rc);
 674 }
 675
 676 int class_config_process_llog(struct llog_ctxt *ctxt, char *name,
 677                               struct config_llog_instance *cfg)
 678 {
 679         struct llog_handle *llh;
 680         int rc, rc2;
 681         ENTRY;
 682
 683         rc = llog_open(ctxt, &llh, NULL, name, 0);
 684         if (rc)
 685                 RETURN(rc);
 686
 687         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
 688         if (rc == 0)
 689                 rc = llog_process(llh, class_config_parse_handler, cfg, NULL);
 690
 691         rc2 = llog_close(llh);
 692         if (rc == 0)
 693                 rc = rc2;
 694
 695         RETURN(rc);
 696 }
 697
 698 static int class_config_dump_handler(struct llog_handle * handle,
 699                                      struct llog_rec_hdr *rec, void *data)
 700 {
 701         int cfg_len = rec->lrh_len;
 702         char *cfg_buf = (char*) (rec + 1);
 703         int rc = 0;
 704         ENTRY;
 705
 706         if (rec->lrh_type == OBD_CFG_REC) {
 707                 char *buf;
 708                 struct lustre_cfg *lcfg;
 709
 710                 rc = lustre_cfg_getdata(&buf, cfg_len, cfg_buf, 1);
 711                 if (rc)
 712                         GOTO(out, rc);
 713                 lcfg = (struct lustre_cfg* ) buf;
 714
 715                 CDEBUG(D_INFO, "lcfg command: 0x%x\n", lcfg->lcfg_command);
 716                 if (lcfg->lcfg_dev_name)
 717                         CDEBUG(D_INFO, "     devname: %s\n",
 718                                lcfg->lcfg_dev_name);
 719                 if (lcfg->lcfg_flags)
 720                         CDEBUG(D_INFO, "       flags: 0x%x\n", lcfg->lcfg_flags);
 721                 if (lcfg->lcfg_nid)
 722                         CDEBUG(D_INFO, "         nid: "LPX64"\n",
 723                                lcfg->lcfg_nid);
 724                 if (lcfg->lcfg_nal)
 725                         CDEBUG(D_INFO, "         nal: %x\n", lcfg->lcfg_nal);
 726                 if (lcfg->lcfg_num)
 727                         CDEBUG(D_INFO, "         nal: %x\n", lcfg->lcfg_num);
 728                 if (lcfg->lcfg_inlbuf1)
 729                         CDEBUG(D_INFO, "     inlbuf1: %s\n",lcfg->lcfg_inlbuf1);
 730                 if (lcfg->lcfg_inlbuf2)
 731                         CDEBUG(D_INFO, "     inlbuf2: %s\n",lcfg->lcfg_inlbuf2);
 732                 if (lcfg->lcfg_inlbuf3)
 733                         CDEBUG(D_INFO, "     inlbuf3: %s\n",lcfg->lcfg_inlbuf3);
 734                 if (lcfg->lcfg_inlbuf4)
 735                         CDEBUG(D_INFO, "     inlbuf4: %s\n",lcfg->lcfg_inlbuf4);
 736                 if (lcfg->lcfg_inlbuf5)
 737                         CDEBUG(D_INFO, "     inlbuf5: %s\n",lcfg->lcfg_inlbuf5);
 738                 if (lcfg->lcfg_inlbuf6)
 739                         CDEBUG(D_INFO, "     inlbuf6: %s\n",lcfg->lcfg_inlbuf6);
 740
 741                 lustre_cfg_freedata(buf, cfg_len);
 742         } else if (rec->lrh_type == PTL_CFG_REC) {
 743                 struct portals_cfg *pcfg = (struct portals_cfg *)cfg_buf;
 744
 745                 CDEBUG(D_INFO, "pcfg command: 0x%x\n", pcfg->pcfg_command);
 746                 if (pcfg->pcfg_nal)
 747                         CDEBUG(D_INFO, "         nal: %d\n",
 748                                pcfg->pcfg_nal);
 749                 if (pcfg->pcfg_gw_nal)
 750                         CDEBUG(D_INFO, "      gw_nal: %d\n",
 751                                pcfg->pcfg_gw_nal);
 752                 if (pcfg->pcfg_nid)
 753                         CDEBUG(D_INFO, "         nid: "LPX64"\n",
 754                                pcfg->pcfg_nid);
 755                 if (pcfg->pcfg_nid2)
 756                         CDEBUG(D_INFO, "        nid2: "LPX64"\n",
 757                                pcfg->pcfg_nid2);
 758                 if (pcfg->pcfg_nid3)
 759                         CDEBUG(D_INFO, "        nid3: "LPX64"\n",
 760                                pcfg->pcfg_nid3);
 761                 if (pcfg->pcfg_misc)
 762                         CDEBUG(D_INFO, "        misc: %d\n",
 763                                pcfg->pcfg_misc);
 764                 if (pcfg->pcfg_id)
 765                         CDEBUG(D_INFO, "          id: 0x%x\n",
 766                                pcfg->pcfg_id);
 767                 if (pcfg->pcfg_flags)
 768                         CDEBUG(D_INFO, "       flags: 0x%x\n",
 769                                pcfg->pcfg_flags);
 770         } else {
 771                 CERROR("unhandled lrh_type: %#x\n", rec->lrh_type);
 772                 rc = -EINVAL;
 773         }
 774 out:
 775         RETURN(rc);
 776 }
 777
 778 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
 779                            struct config_llog_instance *cfg)
 780 {
 781         struct llog_handle *llh;
 782         int rc, rc2;
 783         ENTRY;
 784
 785         rc = llog_open(ctxt, &llh, NULL, name, 0);
 786         if (rc)
 787                 RETURN(rc);
 788
 789         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
 790         if (rc == 0)
 791                 rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
 792
 793         rc2 = llog_close(llh);
 794         if (rc == 0)
 795                 rc = rc2;
 796
 797         RETURN(rc);
 798 }