lustre/lmv/lmv_obd.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2002, 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
  22 #ifndef EXPORT_SYMTAB
  23 # define EXPORT_SYMTAB
  24 #endif
  25 #define DEBUG_SUBSYSTEM S_LMV
  26 #ifdef __KERNEL__
  27 #include <linux/slab.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/pagemap.h>
  32 #include <asm/div64.h>
  33 #include <linux/seq_file.h>
  34 #else
  35 #include <liblustre.h>
  36 #endif
  37 #include <linux/ext2_fs.h>
  38
  39 #include <linux/obd_support.h>
  40 #include <linux/lustre_lib.h>
  41 #include <linux/lustre_net.h>
  42 #include <linux/lustre_idl.h>
  43 #include <linux/lustre_dlm.h>
  44 #include <linux/lustre_mds.h>
  45 #include <linux/obd_class.h>
  46 #include <linux/obd_ost.h>
  47 #include <linux/lprocfs_status.h>
  48 #include <linux/lustre_fsfilt.h>
  49 #include <linux/obd_lmv.h>
  50 #include "lmv_internal.h"
  51
  52 static void lmv_activate_target(struct lmv_obd *lmv,
  53                                 struct lmv_tgt_desc *tgt,
  54                                 int activate)
  55 {
  56         if (tgt->active == activate)
  57                 return;
  58
  59         tgt->active = activate;
  60         lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
  61 }
  62
  63 /* Error codes:
  64  *
  65  *  -EINVAL  : UUID can't be found in the LMV's target list
  66  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
  67  *  -EBADF   : The UUID is found, but the OBD of the wrong type (!)
  68  */
  69 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
  70                               int activate)
  71 {
  72         struct obd_device *obd;
  73         struct lmv_tgt_desc *tgt;
  74         int i, rc = 0;
  75         ENTRY;
  76
  77         CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
  78                lmv, uuid->uuid, activate);
  79
  80         spin_lock(&lmv->lmv_lock);
  81         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
  82                 if (tgt->ltd_exp == NULL)
  83                         continue;
  84
  85                 CDEBUG(D_INFO, "lmv idx %d is %s conn "LPX64"\n",
  86                        i, tgt->uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
  87
  88                 if (strncmp(uuid->uuid, tgt->uuid.uuid, sizeof uuid->uuid) == 0)
  89                         break;
  90         }
  91
  92         if (i == lmv->desc.ld_tgt_count)
  93                 GOTO(out_lmv_lock, rc = -EINVAL);
  94
  95         obd = class_exp2obd(tgt->ltd_exp);
  96         if (obd == NULL)
  97                 GOTO(out_lmv_lock, rc = -ENOTCONN);
  98
  99         CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
 100                obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
 101                obd->obd_type->typ_name, i);
 102         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
 103
 104         if (tgt->active == activate) {
 105                 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
 106                        activate ? "" : "in");
 107                 GOTO(out_lmv_lock, rc);
 108         }
 109
 110         CDEBUG(D_INFO, "Marking OBD %p %sactive\n",
 111                obd, activate ? "" : "in");
 112
 113         lmv_activate_target(lmv, tgt, activate);
 114
 115         EXIT;
 116
 117  out_lmv_lock:
 118         spin_unlock(&lmv->lmv_lock);
 119         return rc;
 120 }
 121
 122 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
 123                       int active, void *data)
 124 {
 125         int rc;
 126         struct obd_uuid *uuid;
 127
 128         if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 129                 CERROR("unexpected notification of %s %s!\n",
 130                        watched->obd_type->typ_name,
 131                        watched->obd_name);
 132                 return -EINVAL;
 133         }
 134         uuid = &watched->u.cli.cl_import->imp_target_uuid;
 135
 136         /* Set MDC as active before notifying the observer, so the observer can
 137          * use the MDC normally.
 138          */
 139         rc = lmv_set_mdc_active(&obd->u.lmv, uuid, active);
 140         if (rc) {
 141                 CERROR("%sactivation of %s failed: %d\n",
 142                        active ? "" : "de", uuid->uuid, rc);
 143                 RETURN(rc);
 144         }
 145
 146         if (obd->obd_observer)
 147                 /* Pass the notification up the chain. */
 148                 rc = obd_notify(obd->obd_observer, watched, active, data);
 149
 150         RETURN(rc);
 151 }
 152
 153 int lmv_attach(struct obd_device *dev, obd_count len, void *data)
 154 {
 155         struct lprocfs_static_vars lvars;
 156         int rc;
 157         ENTRY;
 158
 159         lprocfs_init_vars(lmv, &lvars);
 160         rc = lprocfs_obd_attach(dev, lvars.obd_vars);
 161         if (rc == 0) {
 162 #ifdef __KERNEL__
 163                 struct proc_dir_entry *entry;
 164
 165                 entry = create_proc_entry("target_obd_status", 0444,
 166                                            dev->obd_proc_entry);
 167                 if (entry == NULL)
 168                         RETURN(-ENOMEM);
 169                 entry->proc_fops = &lmv_proc_target_fops;
 170                 entry->data = dev;
 171 #endif
 172        }
 173         RETURN (rc);
 174 }
 175
 176 int lmv_detach(struct obd_device *dev)
 177 {
 178         return lprocfs_obd_detach(dev);
 179 }
 180
 181 /* this is fake connect function. Its purpose is to initialize lmv and say
 182  * caller that everything is okay. Real connection will be performed later. */
 183 static int lmv_connect(struct lustre_handle *conn, struct obd_device *obd,
 184                        struct obd_uuid *cluuid, unsigned long connect_flags)
 185 {
 186         struct lmv_obd *lmv = &obd->u.lmv;
 187         struct obd_export *exp;
 188         struct proc_dir_entry *lmv_proc_dir;
 189         int rc;
 190         ENTRY;
 191
 192         rc = class_connect(conn, obd, cluuid);
 193         if (rc) {
 194                 CERROR("class_connection() returned %d\n", rc);
 195                 RETURN(rc);
 196         }
 197
 198         exp = class_conn2export(conn);
 199
 200         /* we don't want to actually do the underlying connections more than
 201          * once, so keep track. */
 202         lmv->refcount++;
 203         if (lmv->refcount > 1) {
 204                 class_export_put(exp);
 205                 RETURN(0);
 206         }
 207
 208         lmv->exp = exp;
 209         lmv->connected = 0;
 210         lmv->cluuid = *cluuid;
 211         sema_init(&lmv->init_sem, 1);
 212         lmv->connect_flags = connect_flags;
 213
 214         lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
 215                                         NULL, NULL);
 216         if (IS_ERR(lmv_proc_dir)) {
 217                 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
 218                        obd->obd_type->typ_name, obd->obd_name);
 219                 lmv_proc_dir = NULL;
 220         }
 221
 222
 223         RETURN(0);
 224 }
 225
 226 void lmv_set_timeouts(struct obd_device *obd)
 227 {
 228         struct lmv_tgt_desc *tgts;
 229         struct lmv_obd *lmv;
 230         int i;
 231
 232         lmv = &obd->u.lmv;
 233         if (lmv->server_timeout == 0)
 234                 return;
 235
 236         if (lmv->connected == 0)
 237                 return;
 238
 239         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 240                 if (tgts->ltd_exp == NULL)
 241                         continue;
 242
 243                 obd_set_info(tgts->ltd_exp, strlen("inter_mds"),
 244                              "inter_mds", 0, NULL);
 245         }
 246 }
 247
 248 #define MAX_STRING_SIZE 128
 249
 250 /* performs a check if passed obd is connected. If no - connect it. */
 251 int lmv_check_connect(struct obd_device *obd)
 252 {
 253 #ifdef __KERNEL__
 254         struct proc_dir_entry *lmv_proc_dir;
 255 #endif
 256         struct lmv_obd *lmv = &obd->u.lmv;
 257         struct lmv_tgt_desc *tgts;
 258         struct obd_uuid *cluuid;
 259         struct obd_export *exp;
 260         int rc, rc2, i;
 261
 262         if (lmv->connected)
 263                 return 0;
 264
 265         down(&lmv->init_sem);
 266         if (lmv->connected) {
 267                 up(&lmv->init_sem);
 268                 return 0;
 269         }
 270
 271         cluuid = &lmv->cluuid;
 272         exp = lmv->exp;
 273
 274         CDEBUG(D_OTHER, "time to connect %s to %s\n",
 275                cluuid->uuid, obd->obd_name);
 276
 277         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 278                 struct obd_device *tgt_obd;
 279                 struct lustre_handle conn = {0, };
 280                 struct obd_uuid lmv_mdc_uuid = { "LMV_MDC_UUID" };
 281
 282                 LASSERT(tgts != NULL);
 283
 284                 tgt_obd = class_find_client_obd(&tgts->uuid, LUSTRE_MDC_NAME,
 285                                                 &obd->obd_uuid);
 286                 if (!tgt_obd) {
 287                         CERROR("Target %s not attached\n", tgts->uuid.uuid);
 288                         GOTO(out_disc, rc = -EINVAL);
 289                 }
 290
 291                 /* for MDS: don't connect to yourself */
 292                 if (obd_uuid_equals(&tgts->uuid, cluuid)) {
 293                         CDEBUG(D_OTHER, "don't connect back to %s\n",
 294                                cluuid->uuid);
 295                         tgts->ltd_exp = NULL;
 296                         continue;
 297                 }
 298
 299                 CDEBUG(D_OTHER, "connect to %s(%s) - %s, %s FOR %s\n",
 300                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 301                         tgts->uuid.uuid, obd->obd_uuid.uuid,
 302                         cluuid->uuid);
 303
 304                 if (!tgt_obd->obd_set_up) {
 305                         CERROR("Target %s not set up\n", tgts->uuid.uuid);
 306                         GOTO(out_disc, rc = -EINVAL);
 307                 }
 308
 309                 rc = obd_connect(&conn, tgt_obd, &lmv_mdc_uuid,
 310                                  lmv->connect_flags);
 311                 if (rc) {
 312                         CERROR("Target %s connect error %d\n",
 313                                 tgts->uuid.uuid, rc);
 314                         GOTO(out_disc, rc);
 315                 }
 316                 tgts->ltd_exp = class_conn2export(&conn);
 317
 318                 obd_init_ea_size(tgts->ltd_exp, lmv->max_easize,
 319                                  lmv->max_cookiesize);
 320
 321                 rc = obd_register_observer(tgt_obd, obd);
 322                 if (rc) {
 323                         CERROR("Target %s register_observer error %d\n",
 324                                tgts->uuid.uuid, rc);
 325                         obd_disconnect(tgts->ltd_exp, 0);
 326                         GOTO(out_disc, rc);
 327                 }
 328
 329                 lmv->desc.ld_active_tgt_count++;
 330                 tgts->active = 1;
 331
 332                 CDEBUG(D_OTHER, "connected to %s(%s) successfully (%d)\n",
 333                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 334                         atomic_read(&obd->obd_refcount));
 335
 336 #ifdef __KERNEL__
 337                 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 338                 if (lmv_proc_dir) {
 339                         struct obd_device *mdc_obd = class_conn2obd(&conn);
 340                         struct proc_dir_entry *mdc_symlink;
 341                         char name[MAX_STRING_SIZE + 1];
 342
 343                         LASSERT(mdc_obd != NULL);
 344                         LASSERT(mdc_obd->obd_type != NULL);
 345                         LASSERT(mdc_obd->obd_type->typ_name != NULL);
 346                         name[MAX_STRING_SIZE] = '\0';
 347                         snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
 348                                  mdc_obd->obd_type->typ_name,
 349                                  mdc_obd->obd_name);
 350                         mdc_symlink = proc_symlink(mdc_obd->obd_name,
 351                                                    lmv_proc_dir, name);
 352                         if (mdc_symlink == NULL) {
 353                                 CERROR("could not register LMV target "
 354                                        "/proc/fs/lustre/%s/%s/target_obds/%s.",
 355                                        obd->obd_type->typ_name, obd->obd_name,
 356                                        mdc_obd->obd_name);
 357                                 lprocfs_remove(lmv_proc_dir);
 358                                 lmv_proc_dir = NULL;
 359                         }
 360                 }
 361 #endif
 362         }
 363
 364         lmv_set_timeouts(obd);
 365         class_export_put(exp);
 366         lmv->connected = 1;
 367         up(&lmv->init_sem);
 368         return 0;
 369
 370  out_disc:
 371         while (i-- > 0) {
 372                 struct obd_uuid uuid;
 373                 --tgts;
 374                 --lmv->desc.ld_active_tgt_count;
 375                 tgts->active = 0;
 376                 /* save for CERROR below; (we know it's terminated) */
 377                 uuid = tgts->uuid;
 378                 rc2 = obd_disconnect(tgts->ltd_exp, 0);
 379                 if (rc2)
 380                         CERROR("error: LMV target %s disconnect on MDC idx %d: "
 381                                "error %d\n", uuid.uuid, i, rc2);
 382         }
 383         class_disconnect(exp, 0);
 384         up(&lmv->init_sem);
 385         RETURN (rc);
 386 }
 387
 388 static int lmv_disconnect(struct obd_export *exp, int flags)
 389 {
 390         struct obd_device *obd = class_exp2obd(exp);
 391         struct lmv_obd *lmv = &obd->u.lmv;
 392
 393 #ifdef __KERNEL__
 394         struct proc_dir_entry *lmv_proc_dir;
 395 #endif
 396         int rc, i;
 397         ENTRY;
 398
 399         if (!lmv->tgts)
 400                 goto out_local;
 401
 402         /* Only disconnect the underlying layers on the final disconnect. */
 403         lmv->refcount--;
 404         if (lmv->refcount != 0)
 405                 goto out_local;
 406
 407 #ifdef __KERNEL__
 408         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 409 #endif
 410
 411         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 412                 struct obd_device *mdc_obd;
 413
 414                 if (lmv->tgts[i].ltd_exp == NULL)
 415                         continue;
 416
 417                 mdc_obd = class_exp2obd(lmv->tgts[i].ltd_exp);
 418
 419 #ifdef __KERNEL__
 420                 if (lmv_proc_dir) {
 421                         struct proc_dir_entry *mdc_symlink;
 422
 423                         mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
 424                         if (mdc_symlink) {
 425                                 lprocfs_remove(mdc_symlink);
 426                         } else {
 427                                 CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
 428                                        obd->obd_type->typ_name, obd->obd_name,
 429                                        mdc_obd->obd_name);
 430                         }
 431                 }
 432 #endif
 433                 if (obd->obd_no_recov) {
 434                         if (mdc_obd)
 435                                 mdc_obd->obd_no_recov = 1;
 436                 }
 437                 CDEBUG(D_OTHER, "disconnected from %s(%s) successfully\n",
 438                         lmv->tgts[i].ltd_exp->exp_obd->obd_name,
 439                         lmv->tgts[i].ltd_exp->exp_obd->obd_uuid.uuid);
 440
 441                 obd_register_observer(lmv->tgts[i].ltd_exp->exp_obd, NULL);
 442                 rc = obd_disconnect(lmv->tgts[i].ltd_exp, flags);
 443                 if (rc) {
 444                         if (lmv->tgts[i].active) {
 445                                 CERROR("Target %s disconnect error %d\n",
 446                                        lmv->tgts[i].uuid.uuid, rc);
 447                         }
 448                         rc = 0;
 449                 }
 450
 451                 lmv_activate_target(lmv, &lmv->tgts[i], 0);
 452                 lmv->tgts[i].ltd_exp = NULL;
 453         }
 454
 455 #ifdef __KERNEL__
 456         if (lmv_proc_dir) {
 457                 lprocfs_remove(lmv_proc_dir);
 458         } else {
 459                 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
 460                        obd->obd_type->typ_name, obd->obd_name);
 461         }
 462 #endif
 463
 464 out_local:
 465         /* this is the case when no real connection is established by
 466          * lmv_check_connect(). */
 467         if (!lmv->connected)
 468                 class_export_put(exp);
 469         rc = class_disconnect(exp, 0);
 470         if (lmv->refcount == 0)
 471                 lmv->connected = 0;
 472         RETURN(rc);
 473 }
 474
 475 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 476                          int len, void *karg, void *uarg)
 477 {
 478         struct obd_device *obddev = class_exp2obd(exp);
 479         struct lmv_obd *lmv = &obddev->u.lmv;
 480         int i, rc = 0, set = 0;
 481
 482         ENTRY;
 483
 484         if (lmv->desc.ld_tgt_count == 0)
 485                 RETURN(-ENOTTY);
 486
 487         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 488                 int err;
 489
 490                 if (lmv->tgts[i].ltd_exp == NULL)
 491                         continue;
 492
 493                 err = obd_iocontrol(cmd, lmv->tgts[i].ltd_exp, len, karg, uarg);
 494                 if (err) {
 495                         if (lmv->tgts[i].active) {
 496                                 CERROR("error: iocontrol MDC %s on MDT"
 497                                        "idx %d: err = %d\n",
 498                                        lmv->tgts[i].uuid.uuid, i, err);
 499                                 if (!rc)
 500                                         rc = err;
 501                         }
 502                 } else
 503                         set = 1;
 504         }
 505         if (!set && !rc)
 506                 rc = -EIO;
 507
 508         RETURN(rc);
 509 }
 510
 511 static int lmv_setup(struct obd_device *obd, obd_count len, void *buf)
 512 {
 513         int i, rc = 0;
 514         struct lmv_desc *desc;
 515         struct obd_uuid *uuids;
 516         struct lmv_tgt_desc *tgts;
 517         struct obd_device *tgt_obd;
 518         struct lustre_cfg *lcfg = buf;
 519         struct lmv_obd *lmv = &obd->u.lmv;
 520         ENTRY;
 521
 522         if (lcfg->lcfg_inllen1 < 1) {
 523                 CERROR("LMV setup requires a descriptor\n");
 524                 RETURN(-EINVAL);
 525         }
 526
 527         if (lcfg->lcfg_inllen2 < 1) {
 528                 CERROR("LMV setup requires an OST UUID list\n");
 529                 RETURN(-EINVAL);
 530         }
 531
 532         desc = (struct lmv_desc *)lcfg->lcfg_inlbuf1;
 533         if (sizeof(*desc) > lcfg->lcfg_inllen1) {
 534                 CERROR("descriptor size wrong: %d > %d\n",
 535                        (int)sizeof(*desc), lcfg->lcfg_inllen1);
 536                 RETURN(-EINVAL);
 537         }
 538
 539         uuids = (struct obd_uuid *)lcfg->lcfg_inlbuf2;
 540         if (sizeof(*uuids) * desc->ld_tgt_count != lcfg->lcfg_inllen2) {
 541                 CERROR("UUID array size wrong: %u * %u != %u\n",
 542                        sizeof(*uuids), desc->ld_tgt_count, lcfg->lcfg_inllen2);
 543                 RETURN(-EINVAL);
 544         }
 545
 546         lmv->tgts_size = sizeof(struct lmv_tgt_desc) * desc->ld_tgt_count;
 547         OBD_ALLOC(lmv->tgts, lmv->tgts_size);
 548         if (lmv->tgts == NULL) {
 549                 CERROR("Out of memory\n");
 550                 RETURN(-ENOMEM);
 551         }
 552
 553         lmv->desc = *desc;
 554         spin_lock_init(&lmv->lmv_lock);
 555
 556         for (i = 0, tgts = lmv->tgts; i < desc->ld_tgt_count; i++, tgts++)
 557                 tgts->uuid = uuids[i];
 558
 559         lmv->max_cookiesize = 0;
 560
 561         lmv->max_easize = sizeof(struct lustre_id) *
 562                 desc->ld_tgt_count + sizeof(struct mea);
 563
 564         rc = lmv_setup_mgr(obd);
 565         if (rc) {
 566                 CERROR("Can't setup LMV object manager, "
 567                        "error %d.\n", rc);
 568                 OBD_FREE(lmv->tgts, lmv->tgts_size);
 569         }
 570
 571         tgt_obd = class_find_client_obd(&lmv->tgts->uuid, LUSTRE_MDC_NAME,
 572                                         &obd->obd_uuid);
 573         if (!tgt_obd) {
 574                 CERROR("Target %s not attached\n", lmv->tgts->uuid.uuid);
 575                 RETURN(-EINVAL);
 576         }
 577
 578         RETURN(rc);
 579 }
 580
 581 static int lmv_cleanup(struct obd_device *obd, int flags)
 582 {
 583         struct lmv_obd *lmv = &obd->u.lmv;
 584         ENTRY;
 585
 586         lmv_cleanup_mgr(obd);
 587         OBD_FREE(lmv->tgts, lmv->tgts_size);
 588
 589         RETURN(0);
 590 }
 591
 592 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 593                       unsigned long max_age)
 594 {
 595         struct lmv_obd *lmv = &obd->u.lmv;
 596         struct obd_statfs temp;
 597         int rc = 0, i;
 598         ENTRY;
 599
 600         rc = lmv_check_connect(obd);
 601         if (rc)
 602                 RETURN(rc);
 603
 604         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 605                 if (lmv->tgts[i].ltd_exp == NULL) {
 606                         CWARN("%s: NULL export for %d\n", obd->obd_name, i);
 607                         continue;
 608                 }
 609
 610                 rc = obd_statfs(lmv->tgts[i].ltd_exp->exp_obd, &temp, max_age);
 611                 if (rc) {
 612                         CERROR("can't stat MDS #%d (%s)\n", i,
 613                                lmv->tgts[i].ltd_exp->exp_obd->obd_name);
 614                         RETURN(rc);
 615                 }
 616                 if (i == 0) {
 617                         memcpy(osfs, &temp, sizeof(temp));
 618                 } else {
 619                         osfs->os_bavail += temp.os_bavail;
 620                         osfs->os_blocks += temp.os_blocks;
 621                         osfs->os_ffree += temp.os_ffree;
 622                         osfs->os_files += temp.os_files;
 623                 }
 624         }
 625         RETURN(rc);
 626 }
 627
 628 static int lmv_getstatus(struct obd_export *exp, struct lustre_id *id)
 629 {
 630         struct obd_device *obd = exp->exp_obd;
 631         struct lmv_obd *lmv = &obd->u.lmv;
 632         int rc;
 633         ENTRY;
 634
 635         rc = lmv_check_connect(obd);
 636         if (rc)
 637                 RETURN(rc);
 638
 639         rc = md_getstatus(lmv->tgts[0].ltd_exp, id);
 640         id_group(id) = 0;
 641
 642         RETURN(rc);
 643 }
 644
 645 static int lmv_getattr(struct obd_export *exp, struct lustre_id *id,
 646                        unsigned long valid, unsigned int ea_size,
 647                        struct ptlrpc_request **request)
 648 {
 649         struct obd_device *obd = exp->exp_obd;
 650         struct lmv_obd *lmv = &obd->u.lmv;
 651         int rc, i = id_group(id);
 652         struct lmv_obj *obj;
 653         ENTRY;
 654
 655         rc = lmv_check_connect(obd);
 656         if (rc)
 657                 RETURN(rc);
 658
 659         LASSERT(i < lmv->desc.ld_tgt_count);
 660
 661         rc = md_getattr(lmv->tgts[i].ltd_exp, id, valid,
 662                         ea_size, request);
 663         if (rc)
 664                 RETURN(rc);
 665
 666         obj = lmv_grab_obj(obd, id);
 667
 668         CDEBUG(D_OTHER, "GETATTR for "DLID4" %s\n",
 669                OLID4(id), obj ? "(splitted)" : "");
 670
 671         /* if object is splitted, then we loop over all the slaves and gather
 672          * size attribute. In ideal world we would have to gather also mds field
 673          * from all slaves, as object is spread over the cluster and this is
 674          * definitely interesting information and it is not good to loss it,
 675          * but...*/
 676         if (obj) {
 677                 struct mds_body *body;
 678
 679                 if (*request == NULL) {
 680                         lmv_put_obj(obj);
 681                         RETURN(rc);
 682                 }
 683
 684                 body = lustre_msg_buf((*request)->rq_repmsg, 0,
 685                                       sizeof(*body));
 686                 LASSERT(body != NULL);
 687
 688                 lmv_lock_obj(obj);
 689
 690                 for (i = 0; i < obj->objcount; i++) {
 691
 692                         if (lmv->tgts[i].ltd_exp == NULL) {
 693                                 CWARN("%s: NULL export for %d\n",
 694                                       obd->obd_name, i);
 695                                 continue;
 696                         }
 697
 698                         /* skip master obj. */
 699                         if (lmv_id_equal(&obj->id, &obj->objs[i].id))
 700                                 continue;
 701
 702                         body->size += obj->objs[i].size;
 703                 }
 704
 705                 lmv_unlock_obj(obj);
 706                 lmv_put_obj(obj);
 707         }
 708
 709         RETURN(rc);
 710 }
 711
 712 static int lmv_change_cbdata(struct obd_export *exp,
 713                              struct lustre_id *id,
 714                              ldlm_iterator_t it,
 715                              void *data)
 716 {
 717         struct obd_device *obd = exp->exp_obd;
 718         struct lmv_obd *lmv = &obd->u.lmv;
 719         int rc = 0;
 720         ENTRY;
 721
 722         rc = lmv_check_connect(obd);
 723         if (rc)
 724                 RETURN(rc);
 725
 726         CDEBUG(D_OTHER, "CBDATA for "DLID4"\n", OLID4(id));
 727         LASSERT(id_group(id) < lmv->desc.ld_tgt_count);
 728
 729         rc = md_change_cbdata(lmv->tgts[id_group(id)].ltd_exp,
 730                               id, it, data);
 731
 732         RETURN(rc);
 733 }
 734
 735 static int lmv_change_cbdata_name(struct obd_export *exp,
 736                                   struct lustre_id *pid,
 737                                   char *name, int len,
 738                                   struct lustre_id *cid,
 739                                   ldlm_iterator_t it, void *data)
 740 {
 741         struct obd_device *obd = exp->exp_obd;
 742         struct lmv_obd *lmv = &obd->u.lmv;
 743         struct lmv_obj *obj;
 744         int rc = 0, mds;
 745         ENTRY;
 746
 747         rc = lmv_check_connect(obd);
 748         if (rc)
 749                 RETURN(rc);
 750
 751         LASSERT(id_group(pid) < lmv->desc.ld_tgt_count);
 752         LASSERT(id_group(cid) < lmv->desc.ld_tgt_count);
 753
 754         CDEBUG(D_OTHER, "CBDATA for "DLID4":%*s -> "DLID4"\n",
 755                OLID4(pid), len, name, OLID4(cid));
 756
 757         /* this is default mds for directory name belongs to. */
 758         mds = id_group(pid);
 759         obj = lmv_grab_obj(obd, pid);
 760         if (obj) {
 761                 /* directory is splitted. look for right mds for this name. */
 762                 mds = raw_name2idx(obj->hashtype, obj->objcount, name, len);
 763                 mds = id_group(&obj->objs[mds].id);
 764                 lmv_put_obj(obj);
 765         }
 766         rc = md_change_cbdata(lmv->tgts[mds].ltd_exp, cid, it, data);
 767         RETURN(rc);
 768 }
 769
 770 static int lmv_valid_attrs(struct obd_export *exp, struct lustre_id *id)
 771 {
 772         struct obd_device *obd = exp->exp_obd;
 773         struct lmv_obd *lmv = &obd->u.lmv;
 774         int rc = 0;
 775         ENTRY;
 776
 777         rc = lmv_check_connect(obd);
 778         if (rc)
 779                 RETURN(rc);
 780
 781         CDEBUG(D_OTHER, "validate "DLID4"\n", OLID4(id));
 782         LASSERT(id_group(id) < lmv->desc.ld_tgt_count);
 783         rc = md_valid_attrs(lmv->tgts[id_group(id)].ltd_exp, id);
 784         RETURN(rc);
 785 }
 786
 787 int lmv_close(struct obd_export *exp, struct obdo *obdo,
 788                   struct obd_client_handle *och,
 789                   struct ptlrpc_request **request)
 790 {
 791         struct obd_device *obd = exp->exp_obd;
 792         struct lmv_obd *lmv = &obd->u.lmv;
 793         int rc, i = obdo->o_mds;
 794         ENTRY;
 795         rc = lmv_check_connect(obd);
 796         if (rc)
 797                 RETURN(rc);
 798         LASSERT(i < lmv->desc.ld_tgt_count);
 799         CDEBUG(D_OTHER, "CLOSE %lu/%lu/%lu\n", (unsigned long)obdo->o_mds,
 800                (unsigned long)obdo->o_id, (unsigned long)obdo->o_generation);
 801         rc = md_close(lmv->tgts[i].ltd_exp, obdo, och, request);
 802         RETURN(rc);
 803 }
 804
 805 int lmv_get_mea_and_update_object(struct obd_export *exp,
 806                                   struct lustre_id *id)
 807 {
 808         struct obd_device *obd = exp->exp_obd;
 809         struct lmv_obd *lmv = &obd->u.lmv;
 810         struct ptlrpc_request *req = NULL;
 811         struct lmv_obj *obj;
 812         struct lustre_md md;
 813         unsigned long valid;
 814         int mealen, rc;
 815
 816         md.mea = NULL;
 817         mealen = MEA_SIZE_LMV(lmv);
 818
 819         valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 820
 821         /* time to update mea of parent id */
 822         rc = md_getattr(lmv->tgts[id_group(id)].ltd_exp,
 823                         id, valid, mealen, &req);
 824         if (rc) {
 825                 CERROR("md_getattr() failed, error %d\n", rc);
 826                 GOTO(cleanup, rc);
 827         }
 828
 829         rc = mdc_req2lustre_md(exp, req, 0, NULL, &md);
 830         if (rc) {
 831                 CERROR("mdc_req2lustre_md() failed, error %d\n", rc);
 832                 GOTO(cleanup, rc);
 833         }
 834
 835         if (md.mea == NULL)
 836                 GOTO(cleanup, rc = -ENODATA);
 837
 838         obj = lmv_create_obj(exp, id, md.mea);
 839         if (IS_ERR(obj))
 840                 rc = PTR_ERR(obj);
 841
 842         lmv_put_obj(obj);
 843         obd_free_memmd(exp, (struct lov_stripe_md **)&md.mea);
 844
 845 cleanup:
 846         if (req)
 847                 ptlrpc_req_finished(req);
 848         RETURN(rc);
 849 }
 850
 851 int lmv_create(struct obd_export *exp, struct mdc_op_data *op_data,
 852                const void *data, int datalen, int mode, __u32 uid,
 853                __u32 gid, __u64 rdev, struct ptlrpc_request **request)
 854 {
 855         struct obd_device *obd = exp->exp_obd;
 856         struct lmv_obd *lmv = &obd->u.lmv;
 857         struct mds_body *body;
 858         struct lmv_obj *obj;
 859         int rc, mds, loop = 0;
 860         ENTRY;
 861
 862         rc = lmv_check_connect(obd);
 863         if (rc)
 864                 RETURN(rc);
 865
 866         if (!lmv->desc.ld_active_tgt_count)
 867                 RETURN(-EIO);
 868 repeat:
 869         LASSERT(++loop <= 2);
 870         obj = lmv_grab_obj(obd, &op_data->id1);
 871         if (obj) {
 872                 mds = raw_name2idx(obj->hashtype, obj->objcount,
 873                                    op_data->name, op_data->namelen);
 874                 op_data->id1 = obj->objs[mds].id;
 875                 lmv_put_obj(obj);
 876         }
 877
 878         CDEBUG(D_OTHER, "CREATE '%*s' on "DLID4"\n", op_data->namelen,
 879                op_data->name, OLID4(&op_data->id1));
 880
 881         rc = md_create(lmv->tgts[id_group(&op_data->id1)].ltd_exp,
 882                        op_data, data, datalen, mode, uid, gid, rdev, request);
 883         if (rc == 0) {
 884                 if (*request == NULL)
 885                         RETURN(rc);
 886
 887                 body = lustre_msg_buf((*request)->rq_repmsg, 0,
 888                                       sizeof(*body));
 889                 LASSERT(body != NULL);
 890
 891                 CDEBUG(D_OTHER, "created. "DLID4"\n", OLID4(&op_data->id1));
 892
 893 /*                LASSERT(body->valid & OBD_MD_MDS ||
 894                         body->mds == id_group(&op_data->id1));*/
 895         } else if (rc == -ERESTART) {
 896                 /* directory got splitted. time to update local object and
 897                  * repeat the request with proper MDS */
 898                 rc = lmv_get_mea_and_update_object(exp, &op_data->id1);
 899                 if (rc == 0) {
 900                         ptlrpc_req_finished(*request);
 901                         goto repeat;
 902                 }
 903         }
 904         RETURN(rc);
 905 }
 906
 907 int lmv_done_writing(struct obd_export *exp, struct obdo *obdo)
 908 {
 909         struct obd_device *obd = exp->exp_obd;
 910         struct lmv_obd *lmv = &obd->u.lmv;
 911         int rc;
 912         ENTRY;
 913         rc = lmv_check_connect(obd);
 914         if (rc)
 915                 RETURN(rc);
 916
 917         /* FIXME: choose right MDC here */
 918         CWARN("this method isn't implemented yet\n");
 919         rc = md_done_writing(lmv->tgts[0].ltd_exp, obdo);
 920         RETURN(rc);
 921 }
 922
 923 int lmv_enqueue_slaves(struct obd_export *exp, int locktype,
 924                        struct lookup_intent *it, int lockmode,
 925                        struct mdc_op_data *data, struct lustre_handle *lockh,
 926                        void *lmm, int lmmsize, ldlm_completion_callback cb_compl,
 927                        ldlm_blocking_callback cb_blocking, void *cb_data)
 928 {
 929         struct obd_device *obd = exp->exp_obd;
 930         struct lmv_obd *lmv = &obd->u.lmv;
 931         struct mea *mea = data->mea1;
 932         struct mdc_op_data data2;
 933         int i, rc, mds;
 934         ENTRY;
 935
 936         LASSERT(mea != NULL);
 937         for (i = 0; i < mea->mea_count; i++) {
 938                 memset(&data2, 0, sizeof(data2));
 939                 data2.id1 = mea->mea_ids[i];
 940                 mds = id_group(&data2.id1);
 941
 942                 if (lmv->tgts[mds].ltd_exp == NULL)
 943                         continue;
 944
 945                 rc = md_enqueue(lmv->tgts[mds].ltd_exp, locktype, it,
 946                                 lockmode, &data2, lockh + i, lmm, lmmsize,
 947                                 cb_compl, cb_blocking, cb_data);
 948
 949                 CDEBUG(D_OTHER, "take lock on slave "DLID4" -> %d/%d\n",
 950                        OLID4(&mea->mea_ids[i]), rc, it->d.lustre.it_status);
 951                 if (rc)
 952                         GOTO(cleanup, rc);
 953                 if (it->d.lustre.it_data) {
 954                         struct ptlrpc_request *req;
 955                         req = (struct ptlrpc_request *) it->d.lustre.it_data;
 956                         ptlrpc_req_finished(req);
 957                 }
 958
 959                 if (it->d.lustre.it_status)
 960                         GOTO(cleanup, rc = it->d.lustre.it_status);
 961         }
 962         RETURN(0);
 963
 964 cleanup:
 965         /* drop all taken locks */
 966         while (--i >= 0) {
 967                 if (lockh[i].cookie)
 968                         ldlm_lock_decref(lockh + i, lockmode);
 969                 lockh[i].cookie = 0;
 970         }
 971         RETURN(rc);
 972 }
 973
 974 int lmv_enqueue(struct obd_export *exp, int lock_type,
 975                 struct lookup_intent *it, int lock_mode,
 976                 struct mdc_op_data *data, struct lustre_handle *lockh,
 977                 void *lmm, int lmmsize, ldlm_completion_callback cb_compl,
 978                 ldlm_blocking_callback cb_blocking, void *cb_data)
 979 {
 980         struct obd_device *obd = exp->exp_obd;
 981         struct lmv_obd *lmv = &obd->u.lmv;
 982         struct lmv_obj *obj;
 983         int rc, mds;
 984         ENTRY;
 985
 986         rc = lmv_check_connect(obd);
 987         if (rc)
 988                 RETURN(rc);
 989
 990         if (it->it_op == IT_UNLINK) {
 991                 rc = lmv_enqueue_slaves(exp, lock_type, it, lock_mode,
 992                                         data, lockh, lmm, lmmsize,
 993                                         cb_compl, cb_blocking, cb_data);
 994                 RETURN(rc);
 995         }
 996
 997         if (data->namelen) {
 998                 obj = lmv_grab_obj(obd, &data->id1);
 999                 if (obj) {
1000                         /* directory is splitted. look for right mds for this
1001                          * name */
1002                         mds = raw_name2idx(obj->hashtype, obj->objcount,
1003                                            (char *)data->name, data->namelen);
1004                         data->id1 = obj->objs[mds].id;
1005                         lmv_put_obj(obj);
1006                 }
1007         }
1008         CDEBUG(D_OTHER, "ENQUEUE '%s' on "DLID4"\n", LL_IT2STR(it),
1009                OLID4(&data->id1));
1010
1011         rc = md_enqueue(lmv->tgts[id_group(&data->id1)].ltd_exp,
1012                         lock_type, it, lock_mode, data, lockh, lmm,
1013                         lmmsize, cb_compl, cb_blocking, cb_data);
1014
1015         RETURN(rc);
1016 }
1017
1018 int lmv_getattr_name(struct obd_export *exp, struct lustre_id *id,
1019                      char *filename, int namelen, unsigned long valid,
1020                      unsigned int ea_size, struct ptlrpc_request **request)
1021 {
1022         int rc, mds = id_group(id), loop = 0;
1023         struct obd_device *obd = exp->exp_obd;
1024         struct lmv_obd *lmv = &obd->u.lmv;
1025         struct lustre_id rid = *id;
1026         struct mds_body *body;
1027         struct lmv_obj *obj;
1028         ENTRY;
1029         rc = lmv_check_connect(obd);
1030         if (rc)
1031                 RETURN(rc);
1032 repeat:
1033         LASSERT(++loop <= 2);
1034         obj = lmv_grab_obj(obd, id);
1035         if (obj) {
1036                 /* directory is splitted. look for right mds for this name */
1037                 mds = raw_name2idx(obj->hashtype, obj->objcount,
1038                                    filename, namelen - 1);
1039                 rid = obj->objs[mds].id;
1040                 lmv_put_obj(obj);
1041         }
1042
1043         CDEBUG(D_OTHER, "getattr_name for %*s on "DLID4" -> "DLID4"\n",
1044                namelen, filename, OLID4(id), OLID4(&rid));
1045
1046         rc = md_getattr_name(lmv->tgts[id_group(&rid)].ltd_exp,
1047                              &rid, filename, namelen, valid, ea_size, request);
1048         if (rc == 0) {
1049                 /* this could be cross-node reference. in this case all we have
1050                  * right now is mds/ino/generation triple. we'd like to find
1051                  * other attributes */
1052                 body = lustre_msg_buf((*request)->rq_repmsg, 0, sizeof(*body));
1053                 LASSERT(body != NULL);
1054                 if (body->valid & OBD_MD_MDS) {
1055                         struct ptlrpc_request *req = NULL;
1056
1057                         rid = body->id1;
1058                         CDEBUG(D_OTHER, "request attrs for "DLID4"\n", OLID4(&rid));
1059
1060                         rc = md_getattr_name(lmv->tgts[id_group(&rid)].ltd_exp,
1061                                              &rid, NULL, 1, valid, ea_size, &req);
1062                         ptlrpc_req_finished(*request);
1063                         *request = req;
1064                 }
1065         } else if (rc == -ERESTART) {
1066                 /* directory got splitted. time to update local object and
1067                  * repeat the request with proper MDS */
1068                 rc = lmv_get_mea_and_update_object(exp, &rid);
1069                 if (rc == 0) {
1070                         ptlrpc_req_finished(*request);
1071                         goto repeat;
1072                 }
1073         }
1074         RETURN(rc);
1075 }
1076
1077 /*
1078  * llite passes id of an target inode in data->id1 and id of directory in
1079  * data->id2
1080  */
1081 int lmv_link(struct obd_export *exp, struct mdc_op_data *data,
1082              struct ptlrpc_request **request)
1083 {
1084         struct obd_device *obd = exp->exp_obd;
1085         struct lmv_obd *lmv = &obd->u.lmv;
1086         struct lmv_obj *obj;
1087         int rc;
1088         ENTRY;
1089
1090         rc = lmv_check_connect(obd);
1091         if (rc)
1092                 RETURN(rc);
1093
1094         if (data->namelen != 0) {
1095                 /* usual link request */
1096                 obj = lmv_grab_obj(obd, &data->id1);
1097                 if (obj) {
1098                         rc = raw_name2idx(obj->hashtype, obj->objcount,
1099                                           data->name, data->namelen);
1100                         data->id1 = obj->objs[rc].id;
1101                         lmv_put_obj(obj);
1102                 }
1103
1104                 CDEBUG(D_OTHER,"link "DLID4":%*s to "DLID4"\n",
1105                        OLID4(&data->id2), data->namelen, data->name,
1106                        OLID4(&data->id1));
1107         } else {
1108                 /* request from MDS to acquire i_links for inode by id1 */
1109                 CDEBUG(D_OTHER, "inc i_nlinks for "DLID4"\n",
1110                        OLID4(&data->id1));
1111         }
1112
1113         rc = md_link(lmv->tgts[id_group(&data->id1)].ltd_exp,
1114                      data, request);
1115         RETURN(rc);
1116 }
1117
1118 int lmv_rename(struct obd_export *exp, struct mdc_op_data *data,
1119                const char *old, int oldlen, const char *new, int newlen,
1120                struct ptlrpc_request **request)
1121 {
1122         struct obd_device *obd = exp->exp_obd;
1123         struct lmv_obd *lmv = &obd->u.lmv;
1124         struct lmv_obj *obj;
1125         int rc, mds;
1126         ENTRY;
1127
1128         CDEBUG(D_OTHER, "rename %*s in "DLID4" to %*s in "DLID4"\n",
1129                oldlen, old, OLID4(&data->id1), newlen, new, OLID4(&data->id2));
1130
1131         if (!lmv_id_equal(&data->id1, &data->id2)) {
1132                 CDEBUG(D_OTHER,"cross-node rename "DLID4"/%*s to "DLID4"/%*s\n",
1133                        OLID4(&data->id1), oldlen, old, OLID4(&data->id2),
1134                        newlen, new);
1135         }
1136
1137         rc = lmv_check_connect(obd);
1138         if (rc)
1139                 RETURN(rc);
1140
1141         if (oldlen == 0) {
1142                 /* MDS with old dir entry is asking another MDS to create name
1143                  * there */
1144                 CDEBUG(D_OTHER,
1145                        "create %*s(%d/%d) in "DLID4" pointing "
1146                        "to "DLID4"\n", newlen, new, oldlen, newlen,
1147                        OLID4(&data->id2), OLID4(&data->id1));
1148                 mds = id_group(&data->id2);
1149                 goto request;
1150         }
1151
1152         obj = lmv_grab_obj(obd, &data->id1);
1153         if (obj) {
1154                 /* directory is already splitted, so we have to forward request
1155                  * to the right MDS */
1156                 mds = raw_name2idx(obj->hashtype, obj->objcount,
1157                                    (char *)old, oldlen);
1158                 data->id1 = obj->objs[mds].id;
1159                 CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n", mds,
1160                        OLID4(&obj->objs[mds].id));
1161                 lmv_put_obj(obj);
1162         }
1163
1164         obj = lmv_grab_obj(obd, &data->id2);
1165         if (obj) {
1166                 /* directory is already splitted, so we have to forward request
1167                  * to the right MDS */
1168                 mds = raw_name2idx(obj->hashtype, obj->objcount,
1169                                    (char *)new, newlen);
1170
1171                 data->id2 = obj->objs[mds].id;
1172                 CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n", mds,
1173                        OLID4(&obj->objs[mds].id));
1174                 lmv_put_obj(obj);
1175         }
1176
1177         mds = id_group(&data->id1);
1178
1179 request:
1180         rc = md_rename(lmv->tgts[mds].ltd_exp, data, old, oldlen,
1181                        new, newlen, request);
1182         RETURN(rc);
1183 }
1184
1185 int lmv_setattr(struct obd_export *exp, struct mdc_op_data *data,
1186                 struct iattr *iattr, void *ea, int ealen, void *ea2,
1187                 int ea2len, struct ptlrpc_request **request)
1188 {
1189         struct obd_device *obd = exp->exp_obd;
1190         struct lmv_obd *lmv = &obd->u.lmv;
1191         struct ptlrpc_request *req;
1192         struct mds_body *body;
1193         struct lmv_obj *obj;
1194         int rc = 0, i;
1195         ENTRY;
1196
1197         rc = lmv_check_connect(obd);
1198         if (rc)
1199                 RETURN(rc);
1200
1201         obj = lmv_grab_obj(obd, &data->id1);
1202
1203         CDEBUG(D_OTHER, "SETATTR for "DLID4", valid 0x%x%s\n",
1204                OLID4(&data->id1), iattr->ia_valid, obj ? ", splitted" : "");
1205
1206         if (obj) {
1207                 for (i = 0; i < obj->objcount; i++) {
1208                         data->id1 = obj->objs[i].id;
1209
1210                         rc = md_setattr(lmv->tgts[id_group(&data->id1)].ltd_exp,
1211                                         data, iattr, ea, ealen, ea2, ea2len, &req);
1212
1213                         if (lmv_id_equal(&obj->id, &obj->objs[i].id)) {
1214                                 /* this is master object and this request should
1215                                  * be returned back to llite */
1216                                 *request = req;
1217                         } else {
1218                                 ptlrpc_req_finished(req);
1219                         }
1220
1221                         if (rc)
1222                                 break;
1223                 }
1224                 lmv_put_obj(obj);
1225         } else {
1226                 LASSERT(id_group(&data->id1) < lmv->desc.ld_tgt_count);
1227                 rc = md_setattr(lmv->tgts[id_group(&data->id1)].ltd_exp,
1228                                 data, iattr, ea, ealen, ea2, ea2len, request);
1229                 if (rc == 0) {
1230                         body = lustre_msg_buf((*request)->rq_repmsg, 0,
1231                                               sizeof(*body));
1232                         LASSERT(body != NULL);
1233 //                        LASSERT(body->mds == id_group(&data->id1));
1234                 }
1235         }
1236         RETURN(rc);
1237 }
1238
1239 int lmv_sync(struct obd_export *exp, struct lustre_id *id,
1240              struct ptlrpc_request **request)
1241 {
1242         struct obd_device *obd = exp->exp_obd;
1243         struct lmv_obd *lmv = &obd->u.lmv;
1244         int rc;
1245         ENTRY;
1246
1247         rc = lmv_check_connect(obd);
1248         if (rc)
1249                 RETURN(rc);
1250
1251         rc = md_sync(lmv->tgts[id_group(id)].ltd_exp,
1252                      id, request);
1253         RETURN(rc);
1254 }
1255
1256 int lmv_dirobj_blocking_ast(struct ldlm_lock *lock,
1257                             struct ldlm_lock_desc *desc,
1258                             void *data, int flag)
1259 {
1260         struct lustre_handle lockh;
1261         struct lmv_obj *obj;
1262         int rc;
1263         ENTRY;
1264
1265         switch (flag) {
1266         case LDLM_CB_BLOCKING:
1267                 ldlm_lock2handle(lock, &lockh);
1268                 rc = ldlm_cli_cancel(&lockh);
1269                 if (rc < 0) {
1270                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
1271                         RETURN(rc);
1272                 }
1273                 break;
1274         case LDLM_CB_CANCELING:
1275                 /* time to drop cached attrs for dirobj */
1276                 obj = lock->l_ast_data;
1277                 if (obj) {
1278                         CDEBUG(D_OTHER, "cancel %s on "LPU64"/"LPU64
1279                                ", master "DLID4"\n",
1280                                lock->l_resource->lr_name.name[3] == 1 ?
1281                                "LOOKUP" : "UPDATE",
1282                                lock->l_resource->lr_name.name[0],
1283                                lock->l_resource->lr_name.name[1],
1284                                OLID4(&obj->id));
1285                         lmv_put_obj(obj);
1286                 }
1287                 break;
1288         default:
1289                 LBUG();
1290         }
1291         RETURN(0);
1292 }
1293
1294 void lmv_remove_dots(struct page *page)
1295 {
1296         char *kaddr = page_address(page);
1297         unsigned limit = PAGE_CACHE_SIZE;
1298         unsigned offs, rec_len;
1299         struct ext2_dir_entry_2 *p;
1300
1301         for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
1302                 p = (struct ext2_dir_entry_2 *)(kaddr + offs);
1303                 rec_len = le16_to_cpu(p->rec_len);
1304
1305                 if ((p->name_len == 1 && p->name[0] == '.') ||
1306                     (p->name_len == 2 && p->name[0] == '.' && p->name[1] == '.'))
1307                         p->inode = 0;
1308         }
1309 }
1310
1311 int lmv_readpage(struct obd_export *exp, struct lustre_id *id,
1312                  __u64 offset, struct page *page,
1313                  struct ptlrpc_request **request)
1314 {
1315         struct obd_device *obd = exp->exp_obd;
1316         struct lmv_obd *lmv = &obd->u.lmv;
1317         struct lustre_id rid = *id;
1318         struct lmv_obj *obj;
1319         int rc, i;
1320         ENTRY;
1321
1322 #warning "we need well-desgined readdir() implementation"
1323         rc = lmv_check_connect(obd);
1324         if (rc)
1325                 RETURN(rc);
1326
1327         LASSERT(id_group(id) < lmv->desc.ld_tgt_count);
1328         CDEBUG(D_OTHER, "READPAGE at %llu from "DLID4"\n",
1329                offset, OLID4(&rid));
1330
1331         obj = lmv_grab_obj(obd, id);
1332         if (obj) {
1333                 lmv_lock_obj(obj);
1334
1335                 /* find dirobj containing page with requested offset. */
1336                 for (i = 0; i < obj->objcount; i++) {
1337                         if (offset < obj->objs[i].size)
1338                                 break;
1339                         offset -= obj->objs[i].size;
1340                 }
1341                 rid = obj->objs[i].id;
1342
1343                 lmv_unlock_obj(obj);
1344                 lmv_put_obj(obj);
1345
1346                 CDEBUG(D_OTHER, "forward to "DLID4" with offset %lu\n",
1347                        OLID4(&rid), (unsigned long)offset);
1348         }
1349         rc = md_readpage(lmv->tgts[id_group(&rid)].ltd_exp, &rid,
1350                          offset, page, request);
1351
1352         if (rc == 0 && !lmv_id_equal(&rid, id))
1353                 /* this page isn't from master object. To avoid "." and ".."
1354                  * duplication in directory, we have to remove them from all
1355                  * slave objects */
1356                 lmv_remove_dots(page);
1357
1358         RETURN(rc);
1359 }
1360
1361 int lmv_unlink_slaves(struct obd_export *exp, struct mdc_op_data *data,
1362                       struct ptlrpc_request **req)
1363 {
1364         struct obd_device *obd = exp->exp_obd;
1365         struct lmv_obd *lmv = &obd->u.lmv;
1366         struct mea *mea = data->mea1;
1367         struct mdc_op_data data2;
1368         int i, rc = 0, mds;
1369         ENTRY;
1370
1371         LASSERT(mea != NULL);
1372         for (i = 0; i < mea->mea_count; i++) {
1373                 memset(&data2, 0, sizeof(data2));
1374                 data2.id1 = mea->mea_ids[i];
1375                 data2.create_mode = MDS_MODE_DONT_LOCK | S_IFDIR;
1376
1377                 mds = id_group(&data2.id1);
1378
1379                 if (lmv->tgts[mds].ltd_exp == NULL)
1380                         continue;
1381
1382                 rc = md_unlink(lmv->tgts[mds].ltd_exp, &data2, req);
1383                 CDEBUG(D_OTHER, "unlink slave "DLID4" -> %d\n",
1384                        OLID4(&mea->mea_ids[i]), rc);
1385                 if (*req) {
1386                         ptlrpc_req_finished(*req);
1387                         *req = NULL;
1388                 }
1389                 if (rc)
1390                         break;
1391         }
1392         RETURN(rc);
1393 }
1394
1395 int lmv_delete_object(struct obd_export *exp, struct lustre_id *id)
1396 {
1397         ENTRY;
1398
1399         if (!lmv_delete_obj(exp, id)) {
1400                 CDEBUG(D_OTHER, "object "DLID4" is not found.\n",
1401                        OLID4(id));
1402         }
1403
1404         RETURN(0);
1405 }
1406
1407 int lmv_unlink(struct obd_export *exp, struct mdc_op_data *data,
1408                struct ptlrpc_request **request)
1409 {
1410         struct obd_device *obd = exp->exp_obd;
1411         struct lmv_obd *lmv = &obd->u.lmv;
1412         int rc, i = 0;
1413         ENTRY;
1414
1415         rc = lmv_check_connect(obd);
1416         if (rc)
1417                 RETURN(rc);
1418
1419         if (data->namelen == 0 && data->mea1 != NULL) {
1420                 /* mds asks to remove slave objects */
1421                 rc = lmv_unlink_slaves(exp, data, request);
1422                 RETURN(rc);
1423         } else if (data->namelen != 0) {
1424                 struct lmv_obj *obj;
1425
1426                 obj = lmv_grab_obj(obd, &data->id1);
1427                 if (obj) {
1428                         i = raw_name2idx(obj->hashtype, obj->objcount,
1429                                          data->name, data->namelen);
1430                         data->id1 = obj->objs[i].id;
1431                         lmv_put_obj(obj);
1432                 }
1433                 CDEBUG(D_OTHER, "unlink '%*s' in "DLID4" -> %u\n",
1434                        data->namelen, data->name, OLID4(&data->id1),
1435                        i);
1436         } else {
1437                 CDEBUG(D_OTHER, "drop i_nlink on "DLID4"\n",
1438                        OLID4(&data->id1));
1439         }
1440         rc = md_unlink(lmv->tgts[id_group(&data->id1)].ltd_exp,
1441                        data, request);
1442         RETURN(rc);
1443 }
1444
1445 struct obd_device *lmv_get_real_obd(struct obd_export *exp,
1446                                     char *name, int len)
1447 {
1448         struct obd_device *obd = exp->exp_obd;
1449         struct lmv_obd *lmv = &obd->u.lmv;
1450         int rc;
1451         ENTRY;
1452
1453         rc = lmv_check_connect(obd);
1454         if (rc)
1455                 RETURN(ERR_PTR(rc));
1456         obd = lmv->tgts[0].ltd_exp->exp_obd;
1457         EXIT;
1458         return obd;
1459 }
1460
1461 int lmv_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
1462 {
1463         struct obd_device *obd = exp->exp_obd;
1464         struct lmv_obd *lmv = &obd->u.lmv;
1465         int i, rc = 0, change = 0;
1466         ENTRY;
1467
1468         if (lmv->max_easize < easize) {
1469                 lmv->max_easize = easize;
1470                 change = 1;
1471         }
1472         if (lmv->max_cookiesize < cookiesize) {
1473                 lmv->max_cookiesize = cookiesize;
1474                 change = 1;
1475         }
1476         if (change == 0)
1477                 RETURN(0);
1478
1479         if (lmv->connected == 0)
1480                 RETURN(0);
1481
1482         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1483                 if (lmv->tgts[i].ltd_exp == NULL) {
1484                         CWARN("%s: NULL export for %d\n", obd->obd_name, i);
1485                         continue;
1486                 }
1487
1488                 rc = obd_init_ea_size(lmv->tgts[i].ltd_exp, easize, cookiesize);
1489                 if (rc) {
1490                         CERROR("obd_init_ea_size() failed on MDT target %d, "
1491                                "error %d.\n", i, rc);
1492                         break;
1493                 }
1494         }
1495         RETURN(rc);
1496 }
1497
1498 int lmv_obd_create_single(struct obd_export *exp, struct obdo *oa,
1499                           struct lov_stripe_md **ea, struct obd_trans_info *oti)
1500 {
1501         struct obd_device *obd = exp->exp_obd;
1502         struct lmv_obd *lmv = &obd->u.lmv;
1503         struct lov_stripe_md obj_md;
1504         struct lov_stripe_md *obj_mdp = &obj_md;
1505         int rc = 0;
1506         ENTRY;
1507
1508         LASSERT(ea == NULL);
1509         LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
1510
1511         rc = obd_create(lmv->tgts[oa->o_mds].ltd_exp, oa, &obj_mdp, oti);
1512
1513         RETURN(rc);
1514 }
1515
1516 int lmv_getready(struct obd_export *exp)
1517 {
1518         struct obd_device *obd = exp->exp_obd;
1519         int rc = 0;
1520
1521         ENTRY;
1522         rc = lmv_check_connect(obd);
1523         RETURN(rc);
1524 }
1525
1526 /*
1527  * to be called from MDS only.
1528  */
1529 int lmv_obd_create(struct obd_export *exp, struct obdo *oa,
1530                    struct lov_stripe_md **ea, struct obd_trans_info *oti)
1531 {
1532         struct obd_device *obd = exp->exp_obd;
1533         struct lmv_obd *lmv = &obd->u.lmv;
1534         struct lustre_id mid;
1535         int i, c, rc = 0;
1536         struct mea *mea;
1537         int lcount;
1538         ENTRY;
1539
1540         rc = lmv_check_connect(obd);
1541         if (rc)
1542                 RETURN(rc);
1543
1544         LASSERT(oa != NULL);
1545
1546         if (ea == NULL) {
1547                 rc = lmv_obd_create_single(exp, oa, NULL, oti);
1548                 if (rc)
1549                         CERROR("Can't create object, rc = %d\n", rc);
1550                 RETURN(rc);
1551         }
1552
1553         if (*ea == NULL) {
1554                 rc = obd_alloc_diskmd(exp, (struct lov_mds_md **)ea);
1555                 if (rc < 0) {
1556                         CERROR("obd_alloc_diskmd() failed, error %d\n",
1557                                rc);
1558                         RETURN(rc);
1559                 }
1560
1561                 if (*ea == NULL)
1562                         RETURN(-ENOMEM);
1563         }
1564
1565         rc = 0;
1566
1567         id_ino(&mid) = oa->o_id;
1568         id_fid(&mid) = oa->o_fid;
1569         id_gen(&mid) = oa->o_generation;
1570
1571         mea = (struct mea *)*ea;
1572         if (!mea->mea_count || mea->mea_count > lmv->desc.ld_tgt_count)
1573                 mea->mea_count = lmv->desc.ld_tgt_count;
1574
1575         mea->mea_master = -1;
1576         mea->mea_magic = MEA_MAGIC_ALL_CHARS;
1577
1578         lcount = lmv->desc.ld_tgt_count;
1579         for (i = 0, c = 0; c < mea->mea_count && i < lcount; i++) {
1580                 struct lov_stripe_md obj_md;
1581                 struct lov_stripe_md *obj_mdp = &obj_md;
1582
1583                 if (lmv->tgts[i].ltd_exp == NULL) {
1584                         /* this is master MDS */
1585                         mea->mea_master = i;
1586                         id_group(&mea->mea_ids[c]) = i;
1587                         id_ino(&mea->mea_ids[c]) = id_ino(&mid);
1588                         id_gen(&mea->mea_ids[c]) = id_gen(&mid);
1589                         id_fid(&mea->mea_ids[c]) = id_fid(&mid);
1590                         c++;
1591                         continue;
1592                 }
1593
1594                 /* "master" MDS should always be part of stripped dir, so scan
1595                  * for it. */
1596                 if (mea->mea_master == -1 && c == mea->mea_count - 1)
1597                         continue;
1598
1599                 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLTYPE | OBD_MD_FLMODE |
1600                         OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLID;
1601
1602                 rc = obd_create(lmv->tgts[c].ltd_exp, oa, &obj_mdp, oti);
1603                 if (rc) {
1604                         CERROR("obd_create() failed on MDT target %d, "
1605                                "error %d\n", c, rc);
1606                         RETURN(rc);
1607                 }
1608
1609                 CDEBUG(D_OTHER, "dirobj at mds %d: "LPU64"/%u\n",
1610                        i, oa->o_id, oa->o_generation);
1611
1612                 /* here after object is created on desired MDS we save its fid
1613                  * to local mea_ids. */
1614                 LASSERT(oa->o_fid);
1615
1616                 id_group(&mea->mea_ids[c]) = i;
1617                 id_ino(&mea->mea_ids[c]) = oa->o_id;
1618                 id_fid(&mea->mea_ids[c]) = oa->o_fid;
1619                 id_gen(&mea->mea_ids[c]) = oa->o_generation;
1620                 c++;
1621         }
1622         LASSERT(c == mea->mea_count);
1623         CDEBUG(D_OTHER, "%d dirobjects created\n", (int) mea->mea_count);
1624
1625         RETURN(rc);
1626 }
1627
1628 static int lmv_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
1629                          struct obd_device *tgt, int count,
1630                          struct llog_catid *logid)
1631 {
1632         struct llog_ctxt *ctxt;
1633         int rc;
1634         ENTRY;
1635
1636         rc = obd_llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
1637                             &llog_client_ops);
1638         if (rc == 0) {
1639                 ctxt = llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT);
1640                 ctxt->loc_imp = tgt->u.cli.cl_import;
1641         }
1642
1643         RETURN(rc);
1644 }
1645
1646 static int lmv_llog_finish(struct obd_device *obd,
1647                            struct obd_llogs *llogs, int count)
1648 {
1649         int rc;
1650         ENTRY;
1651
1652         rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT));
1653         RETURN(rc);
1654 }
1655
1656 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
1657                         void *key, __u32 *vallen, void *val)
1658 {
1659         struct obd_device *obd;
1660         struct lmv_obd *lmv;
1661         int rc = 0;
1662         ENTRY;
1663
1664         obd = class_exp2obd(exp);
1665         if (obd == NULL) {
1666                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1667                        exp->exp_handle.h_cookie);
1668                 RETURN(-EINVAL);
1669         }
1670
1671         lmv = &obd->u.lmv;
1672         if (keylen == 6 && memcmp(key, "mdsize", 6) == 0) {
1673                 __u32 *mdsize = val;
1674                 *vallen = sizeof(__u32);
1675                 *mdsize = sizeof(struct lustre_id) * lmv->desc.ld_tgt_count
1676                         + sizeof(struct mea);
1677                 RETURN(0);
1678         } else if (keylen == 6 && memcmp(key, "mdsnum", 6) == 0) {
1679                 struct obd_uuid *cluuid = &lmv->cluuid;
1680                 struct lmv_tgt_desc *tgts;
1681                 __u32 *mdsnum = val;
1682                 int i;
1683
1684                 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
1685                         if (obd_uuid_equals(&tgts->uuid, cluuid)) {
1686                                 *vallen = sizeof(__u32);
1687                                 *mdsnum = i;
1688                                 RETURN(0);
1689                         }
1690                 }
1691                 LASSERT(0);
1692         } else if (keylen == 6 && memcmp(key, "rootid", 6) == 0) {
1693                 /* getting rootid from first MDS. */
1694                 rc = obd_get_info(lmv->tgts[0].ltd_exp, keylen, key,
1695                                   vallen, val);
1696                 RETURN(rc);
1697         } else if (keylen >= strlen("lmvdesc") && strcmp(key, "lmvdesc") == 0) {
1698                 struct lmv_desc *desc_ret = val;
1699                 *desc_ret = lmv->desc;
1700                 RETURN(0);
1701         }
1702
1703         CDEBUG(D_IOCTL, "invalid key\n");
1704         RETURN(-EINVAL);
1705 }
1706
1707 int lmv_set_info(struct obd_export *exp, obd_count keylen,
1708                  void *key, obd_count vallen, void *val)
1709 {
1710         struct obd_device *obd;
1711         struct lmv_obd *lmv;
1712         ENTRY;
1713
1714         obd = class_exp2obd(exp);
1715         if (obd == NULL) {
1716                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1717                        exp->exp_handle.h_cookie);
1718                 RETURN(-EINVAL);
1719         }
1720         lmv = &obd->u.lmv;
1721
1722         if (keylen >= strlen("inter_mds") && strcmp(key, "inter_mds") == 0) {
1723                 lmv->server_timeout = 1;
1724                 lmv_set_timeouts(obd);
1725                 RETURN(0);
1726         }
1727
1728         RETURN(-EINVAL);
1729 }
1730
1731 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
1732                struct lov_stripe_md *lsm)
1733 {
1734         struct obd_device *obd = class_exp2obd(exp);
1735         struct lmv_obd *lmv = &obd->u.lmv;
1736         int mea_size;
1737         ENTRY;
1738
1739         mea_size = sizeof(struct lustre_id) *
1740                 lmv->desc.ld_tgt_count + sizeof(struct mea);
1741         if (!lmmp)
1742                 RETURN(mea_size);
1743
1744         if (*lmmp && !lsm) {
1745                 OBD_FREE(*lmmp, mea_size);
1746                 *lmmp = NULL;
1747                 RETURN(0);
1748         }
1749
1750         if (*lmmp == NULL) {
1751                 OBD_ALLOC(*lmmp, mea_size);
1752                 if (*lmmp == NULL)
1753                         RETURN(-ENOMEM);
1754         }
1755
1756         if (!lsm)
1757                 RETURN(mea_size);
1758
1759 #warning "MEA packing/convertation must be here! -bzzz"
1760         memcpy(*lmmp, lsm, mea_size);
1761         RETURN(mea_size);
1762 }
1763
1764 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **mem_tgt,
1765                  struct lov_mds_md *disk_src, int mdsize)
1766 {
1767         struct obd_device *obd = class_exp2obd(exp);
1768         struct lmv_obd *lmv = &obd->u.lmv;
1769         struct mea **tmea = (struct mea **) mem_tgt;
1770         struct mea *mea = (void *) disk_src;
1771         int mea_size;
1772         ENTRY;
1773
1774         mea_size = sizeof(struct lustre_id) *
1775                 lmv->desc.ld_tgt_count + sizeof(struct mea);
1776         if (mem_tgt == NULL)
1777                 return mea_size;
1778
1779         if (*mem_tgt != NULL && disk_src == NULL) {
1780                 OBD_FREE(*tmea, mea_size);
1781                 RETURN(0);
1782         }
1783
1784         LASSERT(mea_size == mdsize);
1785
1786         OBD_ALLOC(*tmea, mea_size);
1787         if (*tmea == NULL)
1788                 RETURN(-ENOMEM);
1789
1790         if (!disk_src)
1791                 RETURN(mea_size);
1792
1793 #warning "MEA unpacking/convertation must be here! -bzzz"
1794         memcpy(*tmea, mea, mdsize);
1795         RETURN(mea_size);
1796 }
1797
1798 int lmv_brw(int rw, struct obd_export *exp, struct obdo *oa,
1799             struct lov_stripe_md *ea, obd_count oa_bufs,
1800             struct brw_page *pgarr, struct obd_trans_info *oti)
1801 {
1802         struct obd_device *obd = exp->exp_obd;
1803         struct lmv_obd *lmv = &obd->u.lmv;
1804         struct mea *mea = (struct mea *) ea;
1805         int err;
1806
1807         LASSERT(oa != NULL);
1808         LASSERT(ea != NULL);
1809         LASSERT(pgarr != NULL);
1810         LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
1811
1812         oa->o_gr = id_gen(&mea->mea_ids[oa->o_mds]);
1813         oa->o_id = id_ino(&mea->mea_ids[oa->o_mds]);
1814         oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
1815
1816         err = obd_brw(rw, lmv->tgts[oa->o_mds].ltd_exp,
1817                       oa, NULL, oa_bufs, pgarr, oti);
1818         RETURN(err);
1819 }
1820
1821 struct obd_ops lmv_obd_ops = {
1822         .o_owner                = THIS_MODULE,
1823         .o_attach               = lmv_attach,
1824         .o_detach               = lmv_detach,
1825         .o_setup                = lmv_setup,
1826         .o_cleanup              = lmv_cleanup,
1827         .o_connect              = lmv_connect,
1828         .o_disconnect           = lmv_disconnect,
1829         .o_statfs               = lmv_statfs,
1830         .o_llog_init            = lmv_llog_init,
1831         .o_llog_finish          = lmv_llog_finish,
1832         .o_get_info             = lmv_get_info,
1833         .o_set_info             = lmv_set_info,
1834         .o_create               = lmv_obd_create,
1835         .o_packmd               = lmv_packmd,
1836         .o_unpackmd             = lmv_unpackmd,
1837         .o_brw                  = lmv_brw,
1838         .o_init_ea_size         = lmv_init_ea_size,
1839         .o_notify               = lmv_notify,
1840         .o_iocontrol            = lmv_iocontrol,
1841         .o_getready             = lmv_getready,
1842 };
1843
1844 struct md_ops lmv_md_ops = {
1845         .m_getstatus            = lmv_getstatus,
1846         .m_getattr              = lmv_getattr,
1847         .m_change_cbdata        = lmv_change_cbdata,
1848         .m_change_cbdata_name   = lmv_change_cbdata_name,
1849         .m_close                = lmv_close,
1850         .m_create               = lmv_create,
1851         .m_done_writing         = lmv_done_writing,
1852         .m_enqueue              = lmv_enqueue,
1853         .m_getattr_name         = lmv_getattr_name,
1854         .m_intent_lock          = lmv_intent_lock,
1855         .m_link                 = lmv_link,
1856         .m_rename               = lmv_rename,
1857         .m_setattr              = lmv_setattr,
1858         .m_sync                 = lmv_sync,
1859         .m_readpage             = lmv_readpage,
1860         .m_unlink               = lmv_unlink,
1861         .m_get_real_obd         = lmv_get_real_obd,
1862         .m_valid_attrs          = lmv_valid_attrs,
1863         .m_delete_object        = lmv_delete_object,
1864 };
1865
1866 int __init lmv_init(void)
1867 {
1868         struct lprocfs_static_vars lvars;
1869         int rc;
1870
1871         lprocfs_init_vars(lmv, &lvars);
1872         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
1873                                  lvars.module_vars, OBD_LMV_DEVICENAME);
1874         RETURN(rc);
1875 }
1876
1877 #ifdef __KERNEL__
1878 static void lmv_exit(void)
1879 {
1880         class_unregister_type(OBD_LMV_DEVICENAME);
1881 }
1882
1883 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1884 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
1885 MODULE_LICENSE("GPL");
1886
1887 module_init(lmv_init);
1888 module_exit(lmv_exit);
1889 #endif