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 /* Error codes:
  53  *
  54  *  -EINVAL  : UUID can't be found in the LMV's target list
  55  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
  56  *  -EBADF   : The UUID is found, but the OBD of the wrong type (!)
  57  */
  58 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
  59                               int activate)
  60 {
  61         struct obd_device *obd;
  62         struct lmv_tgt_desc *tgt;
  63         int i, rc = 0;
  64         ENTRY;
  65
  66         CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
  67                lmv, uuid->uuid, activate);
  68
  69         spin_lock(&lmv->lmv_lock);
  70         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
  71                 if (tgt->ltd_exp == NULL)
  72                         continue;
  73
  74                 CDEBUG(D_INFO, "lmv idx %d is %s conn "LPX64"\n",
  75                        i, tgt->uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
  76                 if (strncmp(uuid->uuid, tgt->uuid.uuid, sizeof uuid->uuid) == 0)
  77                         break;
  78         }
  79
  80         if (i == lmv->desc.ld_tgt_count)
  81                 GOTO(out, rc = -EINVAL);
  82
  83         obd = class_exp2obd(tgt->ltd_exp);
  84         if (obd == NULL)
  85                 GOTO(out, rc = -ENOTCONN);
  86
  87         CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
  88                obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
  89                obd->obd_type->typ_name, i);
  90         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
  91
  92         if (tgt->active == activate) {
  93                 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
  94                        activate ? "" : "in");
  95                 GOTO(out, rc);
  96         }
  97
  98         CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd, activate ? "" : "in");
  99
 100         tgt->active = activate;
 101         if (activate)
 102                 lmv->desc.ld_active_tgt_count++;
 103         else
 104                 lmv->desc.ld_active_tgt_count--;
 105
 106         EXIT;
 107  out:
 108         spin_unlock(&lmv->lmv_lock);
 109         return rc;
 110 }
 111
 112 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
 113                       int active, void *data)
 114 {
 115         int rc;
 116         struct obd_uuid *uuid;
 117
 118         if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 119                 CERROR("unexpected notification of %s %s!\n",
 120                        watched->obd_type->typ_name,
 121                        watched->obd_name);
 122                 return -EINVAL;
 123         }
 124         uuid = &watched->u.cli.cl_import->imp_target_uuid;
 125
 126         /* Set MDC as active before notifying the observer, so the
 127          * observer can use the MDC normally.
 128          */
 129         rc = lmv_set_mdc_active(&obd->u.lmv, uuid, active);
 130         if (rc) {
 131                 CERROR("%sactivation of %s failed: %d\n",
 132                        active ? "" : "de", uuid->uuid, rc);
 133                 RETURN(rc);
 134         }
 135
 136         if (obd->obd_observer)
 137                 /* Pass the notification up the chain. */
 138                 rc = obd_notify(obd->obd_observer, watched, active, data);
 139
 140         RETURN(rc);
 141 }
 142
 143 int lmv_attach(struct obd_device *dev, obd_count len, void *data)
 144 {
 145         struct lprocfs_static_vars lvars;
 146         int rc;
 147         ENTRY;
 148
 149         lprocfs_init_vars(lmv, &lvars);
 150         rc = lprocfs_obd_attach(dev, lvars.obd_vars);
 151         if (rc == 0) {
 152 #ifdef __KERNEL__
 153                 struct proc_dir_entry *entry;
 154
 155                 entry = create_proc_entry("target_obd_status", 0444,
 156                                            dev->obd_proc_entry);
 157                 if (entry == NULL)
 158                         RETURN(-ENOMEM);
 159                 entry->proc_fops = &lmv_proc_target_fops;
 160                 entry->data = dev;
 161 #endif
 162        }
 163         RETURN (rc);
 164 }
 165
 166 int lmv_detach(struct obd_device *dev)
 167 {
 168         return lprocfs_obd_detach(dev);
 169 }
 170
 171 /* This is fake connect function. Its purpose is to initialize lmv and
 172  * say caller that everything is okay. Real connection will be performed
 173  * later. */
 174 static int lmv_connect(struct lustre_handle *conn, struct obd_device *obd,
 175                        struct obd_uuid *cluuid, unsigned long connect_flags)
 176 {
 177         struct lmv_obd *lmv = &obd->u.lmv;
 178         struct obd_export *exp;
 179         struct proc_dir_entry *lmv_proc_dir;
 180         int rc;
 181         ENTRY;
 182
 183         rc = class_connect(conn, obd, cluuid);
 184         if (rc) {
 185                 CERROR("class_connection() returned %d\n", rc);
 186                 RETURN(rc);
 187         }
 188
 189         exp = class_conn2export(conn);
 190         /* We don't want to actually do the underlying connections more than
 191          * once, so keep track. */
 192         lmv->refcount++;
 193         if (lmv->refcount > 1) {
 194                 class_export_put(exp);
 195                 RETURN(0);
 196         }
 197
 198         lmv->cluuid = *cluuid;
 199         lmv->connect_flags = connect_flags;
 200         lmv->connected = 0;
 201         lmv->exp = exp;
 202         sema_init(&lmv->init_sem, 1);
 203
 204         lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
 205                                         NULL, NULL);
 206         if (IS_ERR(lmv_proc_dir)) {
 207                 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
 208                        obd->obd_type->typ_name, obd->obd_name);
 209                 lmv_proc_dir = NULL;
 210         }
 211
 212
 213         RETURN(0);
 214 }
 215
 216 void lmv_set_timeouts(struct obd_device *obd)
 217 {
 218         struct lmv_tgt_desc *tgts;
 219         struct lmv_obd *lmv;
 220         int i;
 221
 222         lmv = &obd->u.lmv;
 223         if (lmv->server_timeout == 0)
 224                 return;
 225
 226         if (lmv->connected == 0)
 227                 return;
 228
 229         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 230                 if (tgts->ltd_exp == NULL)
 231                         continue;
 232                 obd_set_info(tgts->ltd_exp, strlen("inter_mds"),
 233                              "inter_mds", 0, NULL);
 234         }
 235 }
 236
 237 /* Performs a check if passed obd is connected. If no - connect it. */
 238 #define MAX_STRING_SIZE 128
 239 int lmv_check_connect(struct obd_device *obd)
 240 {
 241         struct lmv_obd *lmv = &obd->u.lmv;
 242         struct obd_uuid *cluuid;
 243         struct lmv_tgt_desc *tgts;
 244         struct proc_dir_entry *lmv_proc_dir;
 245         struct obd_export *exp;
 246         int rc, rc2, i;
 247
 248         if (lmv->connected)
 249                 return 0;
 250
 251         down(&lmv->init_sem);
 252         if (lmv->connected) {
 253                 up(&lmv->init_sem);
 254                 return 0;
 255         }
 256
 257         cluuid = &lmv->cluuid;
 258         exp = lmv->exp;
 259
 260         CDEBUG(D_OTHER, "time to connect %s to %s\n",
 261                cluuid->uuid, obd->obd_name);
 262
 263         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 264                 struct obd_device *tgt_obd;
 265                 struct obd_uuid lmv_osc_uuid = { "LMV_OSC_UUID" };
 266                 struct lustre_handle conn = {0, };
 267
 268                 LASSERT(tgts != NULL);
 269
 270                 tgt_obd = class_find_client_obd(&tgts->uuid, LUSTRE_MDC_NAME,
 271                                                 &obd->obd_uuid);
 272                 if (!tgt_obd) {
 273                         CERROR("Target %s not attached\n", tgts->uuid.uuid);
 274                         GOTO(out_disc, rc = -EINVAL);
 275                 }
 276
 277                 /* for MDS: don't connect to yourself */
 278                 if (obd_uuid_equals(&tgts->uuid, cluuid)) {
 279                         CDEBUG(D_OTHER, "don't connect back to %s\n",
 280                                cluuid->uuid);
 281                         tgts->ltd_exp = NULL;
 282                         continue;
 283                 }
 284
 285                 CDEBUG(D_OTHER, "connect to %s(%s) - %s, %s FOR %s\n",
 286                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 287                         tgts->uuid.uuid, obd->obd_uuid.uuid,
 288                         cluuid->uuid);
 289
 290                 if (!tgt_obd->obd_set_up) {
 291                         CERROR("Target %s not set up\n", tgts->uuid.uuid);
 292                         GOTO(out_disc, rc = -EINVAL);
 293                 }
 294
 295                 rc = obd_connect(&conn, tgt_obd, &lmv_osc_uuid,
 296                                  lmv->connect_flags);
 297                 if (rc) {
 298                         CERROR("Target %s connect error %d\n",
 299                                 tgts->uuid.uuid, rc);
 300                         GOTO(out_disc, rc);
 301                 }
 302                 tgts->ltd_exp = class_conn2export(&conn);
 303
 304                 obd_init_ea_size(tgts->ltd_exp, lmv->max_easize,
 305                                  lmv->max_cookiesize);
 306
 307                 rc = obd_register_observer(tgt_obd, obd);
 308                 if (rc) {
 309                         CERROR("Target %s register_observer error %d\n",
 310                                tgts->uuid.uuid, rc);
 311                         obd_disconnect(tgts->ltd_exp, 0);
 312                         GOTO(out_disc, rc);
 313                 }
 314
 315                 lmv->desc.ld_active_tgt_count++;
 316                 tgts->active = 1;
 317
 318                 CDEBUG(D_OTHER, "connected to %s(%s) successfully (%d)\n",
 319                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 320                         atomic_read(&obd->obd_refcount));
 321
 322                 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 323                 if (lmv_proc_dir) {
 324                         struct obd_device *mdc_obd = class_conn2obd(&conn);
 325                         struct proc_dir_entry *mdc_symlink;
 326                         char name[MAX_STRING_SIZE + 1];
 327
 328                         LASSERT(mdc_obd != NULL);
 329                         LASSERT(mdc_obd->obd_type != NULL);
 330                         LASSERT(mdc_obd->obd_type->typ_name != NULL);
 331                         name[MAX_STRING_SIZE] = '\0';
 332                         snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
 333                                  mdc_obd->obd_type->typ_name,
 334                                  mdc_obd->obd_name);
 335                         mdc_symlink = proc_symlink(mdc_obd->obd_name,
 336                                                    lmv_proc_dir, name);
 337                         if (mdc_symlink == NULL) {
 338                                 CERROR("could not register LMV target "
 339                                        "/proc/fs/lustre/%s/%s/target_obds/%s.",
 340                                        obd->obd_type->typ_name, obd->obd_name,
 341                                        mdc_obd->obd_name);
 342                                 lprocfs_remove(lmv_proc_dir);
 343                                 lmv_proc_dir = NULL;
 344                         }
 345                 }
 346         }
 347
 348         lmv_set_timeouts(obd);
 349         class_export_put(exp);
 350         lmv->connected = 1;
 351         up(&lmv->init_sem);
 352         return 0;
 353
 354  out_disc:
 355         while (i-- > 0) {
 356                 struct obd_uuid uuid;
 357                 --tgts;
 358                 --lmv->desc.ld_active_tgt_count;
 359                 tgts->active = 0;
 360                 /* save for CERROR below; (we know it's terminated) */
 361                 uuid = tgts->uuid;
 362                 rc2 = obd_disconnect(tgts->ltd_exp, 0);
 363                 if (rc2)
 364                         CERROR("error: LMV target %s disconnect on MDT idx %d: "
 365                                "error %d\n", uuid.uuid, i, rc2);
 366         }
 367         class_disconnect(exp, 0);
 368         up(&lmv->init_sem);
 369         RETURN (rc);
 370 }
 371
 372 static int lmv_disconnect(struct obd_export *exp, int flags)
 373 {
 374         struct obd_device *obd = class_exp2obd(exp);
 375         struct lmv_obd *lmv = &obd->u.lmv;
 376         struct proc_dir_entry *lmv_proc_dir;
 377         int rc, i;
 378         ENTRY;
 379
 380         if (!lmv->tgts)
 381                 goto out_local;
 382
 383         /* Only disconnect the underlying layers on the final disconnect. */
 384         lmv->refcount--;
 385         if (lmv->refcount != 0)
 386                 goto out_local;
 387
 388         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 389
 390         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 391                 struct obd_device *mdc_obd;
 392
 393                 if (lmv->tgts[i].ltd_exp == NULL)
 394                         continue;
 395
 396                 mdc_obd = class_exp2obd(lmv->tgts[i].ltd_exp);
 397                 if (lmv_proc_dir) {
 398                         struct proc_dir_entry *mdc_symlink;
 399
 400                         mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
 401                         if (mdc_symlink) {
 402                                 lprocfs_remove(mdc_symlink);
 403                         } else {
 404                                 CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
 405                                        obd->obd_type->typ_name, obd->obd_name,
 406                                        mdc_obd->obd_name);
 407                         }
 408                 }
 409
 410                 if (obd->obd_no_recov) {
 411                         /* Pass it on to our clients.
 412                          * XXX This should be an argument to disconnect,
 413                          * XXX not a back-door flag on the OBD.  Ah well.
 414                          */
 415                         struct obd_device *mdc_obd;
 416                         mdc_obd = class_exp2obd(lmv->tgts[i].ltd_exp);
 417                         if (mdc_obd)
 418                                 mdc_obd->obd_no_recov = 1;
 419                 }
 420
 421                 CDEBUG(D_OTHER, "disconnected from %s(%s) successfully\n",
 422                         lmv->tgts[i].ltd_exp->exp_obd->obd_name,
 423                         lmv->tgts[i].ltd_exp->exp_obd->obd_uuid.uuid);
 424
 425                 obd_register_observer(lmv->tgts[i].ltd_exp->exp_obd, NULL);
 426
 427                 rc = obd_disconnect(lmv->tgts[i].ltd_exp, flags);
 428                 if (rc) {
 429                         if (lmv->tgts[i].active) {
 430                                 CERROR("Target %s disconnect error %d\n",
 431                                        lmv->tgts[i].uuid.uuid, rc);
 432                         }
 433                         rc = 0;
 434                 }
 435                 if (lmv->tgts[i].active) {
 436                         lmv->desc.ld_active_tgt_count--;
 437                         lmv->tgts[i].active = 0;
 438                 }
 439                 lmv->tgts[i].ltd_exp = NULL;
 440         }
 441
 442         if (lmv_proc_dir) {
 443                 lprocfs_remove(lmv_proc_dir);
 444         } else {
 445                 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
 446                        obd->obd_type->typ_name, obd->obd_name);
 447         }
 448
 449
 450 out_local:
 451         /* this is the case when no real connection is established by
 452          * lmv_check_connect(). */
 453         if (!lmv->connected)
 454                 class_export_put(exp);
 455         rc = class_disconnect(exp, 0);
 456         if (lmv->refcount == 0)
 457                 lmv->connected = 0;
 458         RETURN(rc);
 459 }
 460
 461 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 462                          int len, void *karg, void *uarg)
 463 {
 464         struct obd_device *obddev = class_exp2obd(exp);
 465         struct lmv_obd *lmv = &obddev->u.lmv;
 466         int i, rc = 0, set = 0;
 467
 468         ENTRY;
 469
 470         if (lmv->desc.ld_tgt_count == 0)
 471                 RETURN(-ENOTTY);
 472
 473         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 474                 int err;
 475
 476                 if (lmv->tgts[i].ltd_exp == NULL) {
 477                         CWARN("%s: NULL export for %d\n", obddev->obd_name, i);
 478                         continue;
 479                 }
 480
 481                 err = obd_iocontrol(cmd, lmv->tgts[i].ltd_exp, len, karg, uarg);
 482                 if (err) {
 483                         if (lmv->tgts[i].active) {
 484                                 CERROR("error: iocontrol MDC %s on MDT"
 485                                        "idx %d: err = %d\n",
 486                                        lmv->tgts[i].uuid.uuid, i, err);
 487                                 if (!rc)
 488                                         rc = err;
 489                         }
 490                 } else
 491                         set = 1;
 492         }
 493         if (!set && !rc)
 494                 rc = -EIO;
 495
 496         RETURN(rc);
 497 }
 498
 499 static int lmv_setup(struct obd_device *obd, obd_count len, void *buf)
 500 {
 501         int i, rc = 0;
 502         struct lmv_desc *desc;
 503         struct obd_uuid *uuids;
 504         struct lmv_tgt_desc *tgts;
 505         struct obd_device *tgt_obd;
 506         struct lustre_cfg *lcfg = buf;
 507         struct lmv_obd *lmv = &obd->u.lmv;
 508         ENTRY;
 509
 510         if (lcfg->lcfg_inllen1 < 1) {
 511                 CERROR("LMV setup requires a descriptor\n");
 512                 RETURN(-EINVAL);
 513         }
 514
 515         if (lcfg->lcfg_inllen2 < 1) {
 516                 CERROR("LMV setup requires an OST UUID list\n");
 517                 RETURN(-EINVAL);
 518         }
 519
 520         desc = (struct lmv_desc *)lcfg->lcfg_inlbuf1;
 521         if (sizeof(*desc) > lcfg->lcfg_inllen1) {
 522                 CERROR("descriptor size wrong: %d > %d\n",
 523                        (int)sizeof(*desc), lcfg->lcfg_inllen1);
 524                 RETURN(-EINVAL);
 525         }
 526
 527         uuids = (struct obd_uuid *)lcfg->lcfg_inlbuf2;
 528         if (sizeof(*uuids) * desc->ld_tgt_count != lcfg->lcfg_inllen2) {
 529                 CERROR("UUID array size wrong: %u * %u != %u\n",
 530                        sizeof(*uuids), desc->ld_tgt_count, lcfg->lcfg_inllen2);
 531                 RETURN(-EINVAL);
 532         }
 533
 534         lmv->bufsize = sizeof(struct lmv_tgt_desc) * desc->ld_tgt_count;
 535         OBD_ALLOC(lmv->tgts, lmv->bufsize);
 536         if (lmv->tgts == NULL) {
 537                 CERROR("Out of memory\n");
 538                 RETURN(-ENOMEM);
 539         }
 540
 541         lmv->desc = *desc;
 542         spin_lock_init(&lmv->lmv_lock);
 543
 544         for (i = 0, tgts = lmv->tgts; i < desc->ld_tgt_count; i++, tgts++)
 545                 tgts->uuid = uuids[i];
 546
 547         lmv->max_cookiesize = 0;
 548
 549         lmv->max_easize = sizeof(struct ll_fid) *
 550                 desc->ld_tgt_count + sizeof(struct mea);
 551
 552         rc = lmv_setup_mgr(obd);
 553         if (rc) {
 554                 CERROR("Can't setup LMV object manager, "
 555                        "error %d.\n", rc);
 556                 OBD_FREE(lmv->tgts, lmv->bufsize);
 557         }
 558
 559         tgt_obd = class_find_client_obd(&lmv->tgts->uuid, LUSTRE_MDC_NAME,
 560                                         &obd->obd_uuid);
 561         if (!tgt_obd) {
 562                 CERROR("Target %s not attached\n", lmv->tgts->uuid.uuid);
 563                 RETURN(-EINVAL);
 564         }
 565
 566         RETURN(rc);
 567 }
 568
 569 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 570                       unsigned long max_age)
 571 {
 572         struct lmv_obd *lmv = &obd->u.lmv;
 573         struct obd_statfs temp;
 574         int rc = 0, i;
 575         ENTRY;
 576
 577         rc = lmv_check_connect(obd);
 578         if (rc)
 579                 RETURN(rc);
 580
 581         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 582                 if (lmv->tgts[i].ltd_exp == NULL) {
 583                         CWARN("%s: NULL export for %d\n", obd->obd_name, i);
 584                         continue;
 585                 }
 586
 587                 rc = obd_statfs(lmv->tgts[i].ltd_exp->exp_obd, &temp, max_age);
 588                 if (rc) {
 589                         CERROR("can't stat MDS #%d (%s)\n", i,
 590                                lmv->tgts[i].ltd_exp->exp_obd->obd_name);
 591                         RETURN(rc);
 592                 }
 593                 if (i == 0) {
 594                         memcpy(osfs, &temp, sizeof(temp));
 595                 } else {
 596                         osfs->os_bavail += temp.os_bavail;
 597                         osfs->os_blocks += temp.os_blocks;
 598                         osfs->os_ffree += temp.os_ffree;
 599                         osfs->os_files += temp.os_files;
 600                 }
 601         }
 602         RETURN(rc);
 603 }
 604
 605 static int lmv_cleanup(struct obd_device *obd, int flags)
 606 {
 607         struct lmv_obd *lmv = &obd->u.lmv;
 608         ENTRY;
 609         lmv_cleanup_mgr(obd);
 610         OBD_FREE(lmv->tgts, lmv->bufsize);
 611         RETURN(0);
 612 }
 613
 614 static int lmv_getstatus(struct obd_export *exp, struct ll_fid *fid)
 615 {
 616         struct obd_device *obd = exp->exp_obd;
 617         struct lmv_obd *lmv = &obd->u.lmv;
 618         int rc;
 619         ENTRY;
 620         rc = lmv_check_connect(obd);
 621         if (rc)
 622                 RETURN(rc);
 623         rc = md_getstatus(lmv->tgts[0].ltd_exp, fid);
 624         fid->mds = 0;
 625         RETURN(rc);
 626 }
 627
 628 static int lmv_getattr(struct obd_export *exp, struct ll_fid *fid,
 629                        unsigned long valid, unsigned int ea_size,
 630                        struct ptlrpc_request **request)
 631 {
 632         struct obd_device *obd = exp->exp_obd;
 633         struct lmv_obd *lmv = &obd->u.lmv;
 634         int rc, i = fid->mds;
 635         struct lmv_obj *obj;
 636         ENTRY;
 637
 638         rc = lmv_check_connect(obd);
 639         if (rc)
 640                 RETURN(rc);
 641
 642         LASSERT(i < lmv->desc.ld_tgt_count);
 643
 644         rc = md_getattr(lmv->tgts[i].ltd_exp, fid, valid,
 645                         ea_size, request);
 646         if (rc)
 647                 RETURN(rc);
 648
 649         obj = lmv_grab_obj(obd, fid);
 650
 651         CDEBUG(D_OTHER, "GETATTR for %lu/%lu/%lu %s\n",
 652                (unsigned long)fid->mds, (unsigned long)fid->id,
 653                (unsigned long)fid->generation, obj ? "(splitted)" : "");
 654
 655         /* if object is splitted, then we loop over all the slaves and gather
 656          * size attribute. In ideal world we would have to gather also mds field
 657          * from all slaves, as object is spread over the cluster and this is
 658          * definitely interesting information and it is not good to loss it,
 659          * but...*/
 660         if (obj) {
 661                 struct mds_body *body;
 662
 663                 if (*request == NULL) {
 664                         lmv_put_obj(obj);
 665                         RETURN(rc);
 666                 }
 667
 668                 body = lustre_msg_buf((*request)->rq_repmsg, 0,
 669                                       sizeof(*body));
 670                 LASSERT(body != NULL);
 671
 672                 lmv_lock_obj(obj);
 673
 674                 for (i = 0; i < obj->objcount; i++) {
 675
 676                         if (lmv->tgts[i].ltd_exp == NULL) {
 677                                 CWARN("%s: NULL export for %d\n",
 678                                       obd->obd_name, i);
 679                                 continue;
 680                         }
 681
 682                         /* skip master obj. */
 683                         if (fid_equal(&obj->fid, &obj->objs[i].fid))
 684                                 continue;
 685
 686                         body->size += obj->objs[i].size;
 687                 }
 688
 689                 lmv_unlock_obj(obj);
 690                 lmv_put_obj(obj);
 691         }
 692
 693         RETURN(rc);
 694 }
 695
 696 static int lmv_change_cbdata(struct obd_export *exp, struct ll_fid *fid,
 697                              ldlm_iterator_t it, void *data)
 698 {
 699         struct obd_device *obd = exp->exp_obd;
 700         struct lmv_obd *lmv = &obd->u.lmv;
 701         int rc = 0;
 702         ENTRY;
 703
 704         rc = lmv_check_connect(obd);
 705         if (rc)
 706                 RETURN(rc);
 707
 708         CDEBUG(D_OTHER, "CBDATA for %lu/%lu/%lu\n", (unsigned long)fid->mds,
 709                (unsigned long)fid->id, (unsigned long)fid->generation);
 710
 711         LASSERT(fid->mds < lmv->desc.ld_tgt_count);
 712
 713         rc = md_change_cbdata(lmv->tgts[fid->mds].ltd_exp,
 714                               fid, it, data);
 715
 716         RETURN(rc);
 717 }
 718
 719 static int lmv_change_cbdata_name(struct obd_export *exp, struct ll_fid *pfid,
 720                                   char *name, int len, struct ll_fid *cfid,
 721                                   ldlm_iterator_t it, void *data)
 722 {
 723         struct obd_device *obd = exp->exp_obd;
 724         struct lmv_obd *lmv = &obd->u.lmv;
 725         struct lmv_obj *obj;
 726         int rc = 0, mds;
 727         ENTRY;
 728
 729         rc = lmv_check_connect(obd);
 730         if (rc)
 731                 RETURN(rc);
 732
 733         LASSERT(pfid->mds < lmv->desc.ld_tgt_count);
 734         LASSERT(cfid->mds < lmv->desc.ld_tgt_count);
 735
 736         CDEBUG(D_OTHER, "CBDATA for %lu/%lu/%lu:%*s -> %lu/%lu/%lu\n",
 737                (unsigned long)pfid->mds, (unsigned long)pfid->id,
 738                (unsigned long)pfid->generation, len, name,
 739                (unsigned long)cfid->mds, (unsigned long)cfid->id,
 740                (unsigned long)cfid->generation);
 741
 742         /* this is default mds for directory name belongs to. */
 743         mds = pfid->mds;
 744         obj = lmv_grab_obj(obd, pfid);
 745         if (obj) {
 746                 /* directory is splitted. look for right mds for this name. */
 747                 mds = raw_name2idx(obj->hashtype, obj->objcount, name, len);
 748                 mds = obj->objs[mds].fid.mds;
 749                 lmv_put_obj(obj);
 750         }
 751         rc = md_change_cbdata(lmv->tgts[mds].ltd_exp, cfid, it, data);
 752         RETURN(rc);
 753 }
 754
 755 static int lmv_valid_attrs(struct obd_export *exp, struct ll_fid *fid)
 756 {
 757         struct obd_device *obd = exp->exp_obd;
 758         struct lmv_obd *lmv = &obd->u.lmv;
 759         int rc = 0;
 760         ENTRY;
 761         rc = lmv_check_connect(obd);
 762         if (rc)
 763                 RETURN(rc);
 764         CDEBUG(D_OTHER, "validate %lu/%lu/%lu\n", (unsigned long) fid->mds,
 765                (unsigned long) fid->id, (unsigned long) fid->generation);
 766         LASSERT(fid->mds < lmv->desc.ld_tgt_count);
 767         rc = md_valid_attrs(lmv->tgts[fid->mds].ltd_exp, fid);
 768         RETURN(rc);
 769 }
 770
 771 int lmv_close(struct obd_export *exp, struct obdo *obdo,
 772                   struct obd_client_handle *och,
 773                   struct ptlrpc_request **request)
 774 {
 775         struct obd_device *obd = exp->exp_obd;
 776         struct lmv_obd *lmv = &obd->u.lmv;
 777         int rc, i = obdo->o_mds;
 778         ENTRY;
 779         rc = lmv_check_connect(obd);
 780         if (rc)
 781                 RETURN(rc);
 782         LASSERT(i < lmv->desc.ld_tgt_count);
 783         CDEBUG(D_OTHER, "CLOSE %lu/%lu/%lu\n", (unsigned long) obdo->o_mds,
 784                (unsigned long) obdo->o_id, (unsigned long) obdo->o_generation);
 785         rc = md_close(lmv->tgts[i].ltd_exp, obdo, och, request);
 786         RETURN(rc);
 787 }
 788
 789 int lmv_get_mea_and_update_object(struct obd_export *exp, struct ll_fid *fid)
 790 {
 791         struct obd_device *obd = exp->exp_obd;
 792         struct lmv_obd *lmv = &obd->u.lmv;
 793         struct ptlrpc_request *req = NULL;
 794         struct lmv_obj *obj;
 795         struct lustre_md md;
 796         unsigned long valid;
 797         int mealen, rc;
 798
 799         md.mea = NULL;
 800         mealen = MEA_SIZE_LMV(lmv);
 801
 802         valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 803
 804         /* time to update mea of parent fid */
 805         rc = md_getattr(lmv->tgts[fid->mds].ltd_exp, fid,
 806                         valid, mealen, &req);
 807         if (rc) {
 808                 CERROR("md_getattr() failed, error %d\n", rc);
 809                 GOTO(cleanup, rc);
 810         }
 811
 812         rc = mdc_req2lustre_md(exp, req, 0, NULL, &md);
 813         if (rc) {
 814                 CERROR("mdc_req2lustre_md() failed, error %d\n", rc);
 815                 GOTO(cleanup, rc);
 816         }
 817
 818         if (md.mea == NULL)
 819                 GOTO(cleanup, rc = -ENODATA);
 820
 821         obj = lmv_create_obj(exp, fid, md.mea);
 822         if (IS_ERR(obj))
 823                 rc = PTR_ERR(obj);
 824
 825         lmv_put_obj(obj);
 826         obd_free_memmd(exp, (struct lov_stripe_md **)&md.mea);
 827
 828 cleanup:
 829         if (req)
 830                 ptlrpc_req_finished(req);
 831         RETURN(rc);
 832 }
 833
 834 int lmv_create(struct obd_export *exp, struct mdc_op_data *op_data,
 835                const void *data, int datalen, int mode, __u32 uid,
 836                __u32 gid, __u64 rdev, struct ptlrpc_request **request)
 837 {
 838         struct obd_device *obd = exp->exp_obd;
 839         struct lmv_obd *lmv = &obd->u.lmv;
 840         struct mds_body *body;
 841         struct lmv_obj *obj;
 842         int rc, mds, loop = 0;
 843         ENTRY;
 844
 845         rc = lmv_check_connect(obd);
 846         if (rc)
 847                 RETURN(rc);
 848
 849         if (!lmv->desc.ld_active_tgt_count)
 850                 RETURN(-EIO);
 851 repeat:
 852         LASSERT(++loop <= 2);
 853         obj = lmv_grab_obj(obd, &op_data->fid1);
 854         if (obj) {
 855                 mds = raw_name2idx(obj->hashtype, obj->objcount, op_data->name,
 856                                    op_data->namelen);
 857                 op_data->fid1 = obj->objs[mds].fid;
 858                 lmv_put_obj(obj);
 859         }
 860
 861         CDEBUG(D_OTHER, "CREATE '%*s' on %lu/%lu/%lu\n", op_data->namelen,
 862                op_data->name, (unsigned long)op_data->fid1.mds,
 863                (unsigned long)op_data->fid1.id,
 864                (unsigned long)op_data->fid1.generation);
 865
 866         rc = md_create(lmv->tgts[op_data->fid1.mds].ltd_exp, op_data, data,
 867                        datalen, mode, uid, gid, rdev, request);
 868         if (rc == 0) {
 869                 if (*request == NULL)
 870                         RETURN(rc);
 871
 872                 body = lustre_msg_buf((*request)->rq_repmsg, 0,
 873                                       sizeof(*body));
 874                 LASSERT(body != NULL);
 875
 876                 CDEBUG(D_OTHER, "created. id = %lu, generation = %lu, "
 877                        "mds = %d\n", (unsigned long)body->fid1.id,
 878                        (unsigned long)body->fid1.generation, op_data->fid1.mds);
 879
 880                 LASSERT(body->valid & OBD_MD_MDS ||
 881                         body->mds == op_data->fid1.mds);
 882         } else if (rc == -ERESTART) {
 883                 /* directory got splitted. time to update local object and
 884                  * repeat the request with proper MDS */
 885                 rc = lmv_get_mea_and_update_object(exp, &op_data->fid1);
 886                 if (rc == 0) {
 887                         ptlrpc_req_finished(*request);
 888                         goto repeat;
 889                 }
 890         }
 891         RETURN(rc);
 892 }
 893
 894 int lmv_done_writing(struct obd_export *exp, struct obdo *obdo)
 895 {
 896         struct obd_device *obd = exp->exp_obd;
 897         struct lmv_obd *lmv = &obd->u.lmv;
 898         int rc;
 899         ENTRY;
 900         rc = lmv_check_connect(obd);
 901         if (rc)
 902                 RETURN(rc);
 903
 904         /* FIXME: choose right MDC here */
 905         CWARN("this method isn't implemented yet\n");
 906         rc = md_done_writing(lmv->tgts[0].ltd_exp, obdo);
 907         RETURN(rc);
 908 }
 909
 910 int lmv_enqueue_slaves(struct obd_export *exp, int locktype,
 911                        struct lookup_intent *it, int lockmode,
 912                        struct mdc_op_data *data, struct lustre_handle *lockh,
 913                        void *lmm, int lmmsize, ldlm_completion_callback cb_completion,
 914                        ldlm_blocking_callback cb_blocking, void *cb_data)
 915 {
 916         struct obd_device *obd = exp->exp_obd;
 917         struct lmv_obd *lmv = &obd->u.lmv;
 918         struct mea *mea = data->mea1;
 919         struct mdc_op_data data2;
 920         int i, rc, mds;
 921         ENTRY;
 922
 923         LASSERT(mea != NULL);
 924         for (i = 0; i < mea->mea_count; i++) {
 925                 memset(&data2, 0, sizeof(data2));
 926                 data2.fid1 = mea->mea_fids[i];
 927                 mds = data2.fid1.mds;
 928
 929                 if (lmv->tgts[mds].ltd_exp == NULL)
 930                         continue;
 931
 932                 rc = md_enqueue(lmv->tgts[mds].ltd_exp, locktype, it, lockmode,
 933                                 &data2, lockh + i, lmm, lmmsize, cb_completion,
 934                                 cb_blocking, cb_data);
 935
 936                 CDEBUG(D_OTHER, "take lock on slave %lu/%lu/%lu -> %d/%d\n",
 937                        (unsigned long)mea->mea_fids[i].mds,
 938                        (unsigned long)mea->mea_fids[i].id,
 939                        (unsigned long)mea->mea_fids[i].generation,
 940                        rc, it->d.lustre.it_status);
 941                 if (rc)
 942                         GOTO(cleanup, rc);
 943                 if (it->d.lustre.it_data) {
 944                         struct ptlrpc_request *req;
 945                         req = (struct ptlrpc_request *) it->d.lustre.it_data;
 946                         ptlrpc_req_finished(req);
 947                 }
 948
 949                 if (it->d.lustre.it_status)
 950                         GOTO(cleanup, rc = it->d.lustre.it_status);
 951         }
 952         RETURN(0);
 953
 954 cleanup:
 955         /* drop all taken locks */
 956         while (--i >= 0) {
 957                 if (lockh[i].cookie)
 958                         ldlm_lock_decref(lockh + i, lockmode);
 959                 lockh[i].cookie = 0;
 960         }
 961         RETURN(rc);
 962 }
 963
 964 int lmv_enqueue(struct obd_export *exp, int lock_type,
 965                 struct lookup_intent *it, int lock_mode,
 966                 struct mdc_op_data *data, struct lustre_handle *lockh,
 967                 void *lmm, int lmmsize, ldlm_completion_callback cb_completion,
 968                 ldlm_blocking_callback cb_blocking, void *cb_data)
 969 {
 970         struct obd_device *obd = exp->exp_obd;
 971         struct lmv_obd *lmv = &obd->u.lmv;
 972         struct lmv_obj *obj;
 973         int rc, mds;
 974         ENTRY;
 975
 976         rc = lmv_check_connect(obd);
 977         if (rc)
 978                 RETURN(rc);
 979
 980         if (it->it_op == IT_UNLINK) {
 981                 rc = lmv_enqueue_slaves(exp, lock_type, it, lock_mode,
 982                                         data, lockh, lmm, lmmsize,
 983                                         cb_completion, cb_blocking, cb_data);
 984                 RETURN(rc);
 985         }
 986
 987         if (data->namelen) {
 988                 obj = lmv_grab_obj(obd, &data->fid1);
 989                 if (obj) {
 990                         /* directory is splitted. look for right mds for this
 991                          * name */
 992                         mds = raw_name2idx(obj->hashtype, obj->objcount,
 993                                            (char *)data->name, data->namelen);
 994                         data->fid1 = obj->objs[mds].fid;
 995                         lmv_put_obj(obj);
 996                 }
 997         }
 998         CDEBUG(D_OTHER, "ENQUEUE '%s' on %lu/%lu\n", LL_IT2STR(it),
 999                (unsigned long)data->fid1.id, (unsigned long)data->fid1.generation);
1000
1001         rc = md_enqueue(lmv->tgts[data->fid1.mds].ltd_exp, lock_type, it,
1002                         lock_mode, data, lockh, lmm, lmmsize, cb_completion,
1003                         cb_blocking, cb_data);
1004
1005         RETURN(rc);
1006 }
1007
1008 int lmv_getattr_name(struct obd_export *exp, struct ll_fid *fid,
1009                      char *filename, int namelen, unsigned long valid,
1010                      unsigned int ea_size, struct ptlrpc_request **request)
1011 {
1012         struct obd_device *obd = exp->exp_obd;
1013         struct lmv_obd *lmv = &obd->u.lmv;
1014         struct ll_fid rfid = *fid;
1015         int rc, mds = fid->mds, loop = 0;
1016         struct mds_body *body;
1017         struct lmv_obj *obj;
1018         ENTRY;
1019         rc = lmv_check_connect(obd);
1020         if (rc)
1021                 RETURN(rc);
1022 repeat:
1023         LASSERT(++loop <= 2);
1024         obj = lmv_grab_obj(obd, fid);
1025         if (obj) {
1026                 /* directory is splitted. look for right mds for this name */
1027                 mds = raw_name2idx(obj->hashtype, obj->objcount, filename, namelen - 1);
1028                 rfid = obj->objs[mds].fid;
1029                 lmv_put_obj(obj);
1030         }
1031
1032         CDEBUG(D_OTHER, "getattr_name for %*s on %lu/%lu/%lu -> %lu/%lu/%lu\n",
1033                namelen, filename, (unsigned long)fid->mds,
1034                (unsigned long)fid->id, (unsigned long)fid->generation,
1035                (unsigned long)rfid.mds, (unsigned long)rfid.id,
1036                (unsigned long)rfid.generation);
1037
1038         rc = md_getattr_name(lmv->tgts[rfid.mds].ltd_exp, &rfid, filename,
1039                              namelen, valid, ea_size, request);
1040         if (rc == 0) {
1041                 /* this could be cross-node reference. in this case all we have
1042                  * right now is mds/ino/generation triple. we'd like to find
1043                  * other attributes */
1044                 body = lustre_msg_buf((*request)->rq_repmsg, 0, sizeof(*body));
1045                 LASSERT(body != NULL);
1046                 if (body->valid & OBD_MD_MDS) {
1047                         struct ptlrpc_request *req = NULL;
1048                         rfid = body->fid1;
1049                         CDEBUG(D_OTHER, "request attrs for %lu/%lu/%lu\n",
1050                                (unsigned long) rfid.mds,
1051                                (unsigned long) rfid.id,
1052                                (unsigned long) rfid.generation);
1053                         rc = md_getattr_name(lmv->tgts[rfid.mds].ltd_exp, &rfid,
1054                                              NULL, 1, valid, ea_size, &req);
1055                         ptlrpc_req_finished(*request);
1056                         *request = req;
1057                 }
1058         } else if (rc == -ERESTART) {
1059                 /* directory got splitted. time to update local object and
1060                  * repeat the request with proper MDS */
1061                 rc = lmv_get_mea_and_update_object(exp, &rfid);
1062                 if (rc == 0) {
1063                         ptlrpc_req_finished(*request);
1064                         goto repeat;
1065                 }
1066         }
1067         RETURN(rc);
1068 }
1069
1070
1071 /*
1072  * llite passes fid of an target inode in data->fid1 and fid of directory in
1073  * data->fid2
1074  */
1075 int lmv_link(struct obd_export *exp, struct mdc_op_data *data,
1076              struct ptlrpc_request **request)
1077 {
1078         struct obd_device *obd = exp->exp_obd;
1079         struct lmv_obd *lmv = &obd->u.lmv;
1080         struct lmv_obj *obj;
1081         int rc;
1082         ENTRY;
1083
1084         rc = lmv_check_connect(obd);
1085         if (rc)
1086                 RETURN(rc);
1087
1088         if (data->namelen != 0) {
1089                 /* usual link request */
1090                 obj = lmv_grab_obj(obd, &data->fid1);
1091                 if (obj) {
1092                         rc = raw_name2idx(obj->hashtype, obj->objcount, data->name,
1093                                           data->namelen);
1094                         data->fid1 = obj->objs[rc].fid;
1095                         lmv_put_obj(obj);
1096                 }
1097
1098                 CDEBUG(D_OTHER,"link %lu/%lu/%lu:%*s to %lu/%lu/%lu mds %lu\n",
1099                        (unsigned long)data->fid2.mds,
1100                        (unsigned long)data->fid2.id,
1101                        (unsigned long)data->fid2.generation,
1102                        data->namelen, data->name,
1103                        (unsigned long)data->fid1.mds,
1104                        (unsigned long)data->fid1.id,
1105                        (unsigned long)data->fid1.generation,
1106                        (unsigned long)data->fid1.mds);
1107         } else {
1108                 /* request from MDS to acquire i_links for inode by fid1 */
1109                 CDEBUG(D_OTHER, "inc i_nlinks for %lu/%lu/%lu\n",
1110                        (unsigned long)data->fid1.mds,
1111                        (unsigned long)data->fid1.id,
1112                        (unsigned long)data->fid1.generation);
1113         }
1114
1115         rc = md_link(lmv->tgts[data->fid1.mds].ltd_exp, data, request);
1116         RETURN(rc);
1117 }
1118
1119 int lmv_rename(struct obd_export *exp, struct mdc_op_data *data,
1120                const char *old, int oldlen, const char *new, int newlen,
1121                struct ptlrpc_request **request)
1122 {
1123         struct obd_device *obd = exp->exp_obd;
1124         struct lmv_obd *lmv = &obd->u.lmv;
1125         struct lmv_obj *obj;
1126         int rc, mds;
1127         ENTRY;
1128
1129         CDEBUG(D_OTHER, "rename %*s in %lu/%lu/%lu to %*s in %lu/%lu/%lu\n",
1130                oldlen, old, (unsigned long)data->fid1.mds,
1131                (unsigned long)data->fid1.id,
1132                (unsigned long)data->fid1.generation,
1133                newlen, new, (unsigned long) data->fid2.mds,
1134                (unsigned long) data->fid2.id,
1135                (unsigned long) data->fid2.generation);
1136
1137         if (!fid_equal(&data->fid1, &data->fid2))
1138                 CWARN("cross-node rename %lu/%lu/%lu:%*s to %lu/%lu/%lu:%*s\n",
1139                       (unsigned long)data->fid1.mds,
1140                       (unsigned long)data->fid1.id,
1141                       (unsigned long)data->fid1.generation, oldlen, old,
1142                       (unsigned long)data->fid2.mds,
1143                       (unsigned long)data->fid2.id,
1144                       (unsigned long)data->fid2.generation, newlen, new);
1145
1146         rc = lmv_check_connect(obd);
1147         if (rc)
1148                 RETURN(rc);
1149
1150         if (oldlen == 0) {
1151                 /* MDS with old dir entry is asking another MDS to create name
1152                  * there */
1153                 CDEBUG(D_OTHER,
1154                        "create %*s(%d/%d) in %lu/%lu/%lu pointing to %lu/%lu/%lu\n",
1155                        newlen, new, oldlen, newlen,
1156                        (unsigned long)data->fid2.mds,
1157                        (unsigned long)data->fid2.id,
1158                        (unsigned long)data->fid2.generation,
1159                        (unsigned long)data->fid1.mds,
1160                        (unsigned long)data->fid1.id,
1161                        (unsigned long)data->fid1.generation);
1162                 mds = data->fid2.mds;
1163                 goto request;
1164         }
1165
1166         obj = lmv_grab_obj(obd, &data->fid1);
1167         if (obj) {
1168                 /* directory is already splitted, so we have to forward request
1169                  * to the right MDS */
1170                 mds = raw_name2idx(obj->hashtype, obj->objcount, (char *)old, oldlen);
1171                 data->fid1 = obj->objs[mds].fid;
1172                 CDEBUG(D_OTHER, "forward to MDS #%u (%lu/%lu/%lu)\n", mds,
1173                        (unsigned long)obj->objs[mds].fid.mds,
1174                        (unsigned long)obj->objs[mds].fid.id,
1175                        (unsigned long)obj->objs[mds].fid.generation);
1176                 lmv_put_obj(obj);
1177         }
1178
1179         obj = lmv_grab_obj(obd, &data->fid2);
1180         if (obj) {
1181                 /* directory is already splitted, so we have to forward request
1182                  * to the right MDS */
1183                 mds = raw_name2idx(obj->hashtype, obj->objcount, (char *)new, newlen);
1184                 data->fid2 = obj->objs[mds].fid;
1185                 CDEBUG(D_OTHER, "forward to MDS #%u (%lu/%lu/%lu)\n", mds,
1186                        (unsigned long)obj->objs[mds].fid.mds,
1187                        (unsigned long)obj->objs[mds].fid.id,
1188                        (unsigned long)obj->objs[mds].fid.generation);
1189                 lmv_put_obj(obj);
1190         }
1191
1192         mds = data->fid1.mds;
1193
1194 request:
1195         rc = md_rename(lmv->tgts[mds].ltd_exp, data, old, oldlen,
1196                        new, newlen, request);
1197         RETURN(rc);
1198 }
1199
1200 int lmv_setattr(struct obd_export *exp, struct mdc_op_data *data,
1201                 struct iattr *iattr, void *ea, int ealen, void *ea2,
1202                 int ea2len, struct ptlrpc_request **request)
1203 {
1204         struct obd_device *obd = exp->exp_obd;
1205         struct lmv_obd *lmv = &obd->u.lmv;
1206         struct ptlrpc_request *req;
1207         struct mds_body *body;
1208         struct lmv_obj *obj;
1209         int rc = 0, i;
1210         ENTRY;
1211
1212         rc = lmv_check_connect(obd);
1213         if (rc)
1214                 RETURN(rc);
1215
1216         obj = lmv_grab_obj(obd, &data->fid1);
1217
1218         CDEBUG(D_OTHER, "SETATTR for %lu/%lu/%lu, valid 0x%x%s\n",
1219                (unsigned long)data->fid1.mds, (unsigned long)data->fid1.id,
1220                (unsigned long)data->fid1.generation, iattr->ia_valid,
1221                obj ? ", splitted" : "");
1222
1223         if (obj) {
1224                 for (i = 0; i < obj->objcount; i++) {
1225                         data->fid1 = obj->objs[i].fid;
1226
1227                         rc = md_setattr(lmv->tgts[data->fid1.mds].ltd_exp, data,
1228                                         iattr, ea, ealen, ea2, ea2len, &req);
1229
1230                         if (fid_equal(&obj->fid, &obj->objs[i].fid)) {
1231                                 /* this is master object and this request should
1232                                  * be returned back to llite */
1233                                 *request = req;
1234                         } else {
1235                                 ptlrpc_req_finished(req);
1236                         }
1237
1238                         if (rc)
1239                                 break;
1240                 }
1241                 lmv_put_obj(obj);
1242         } else {
1243                 LASSERT(data->fid1.mds < lmv->desc.ld_tgt_count);
1244                 rc = md_setattr(lmv->tgts[data->fid1.mds].ltd_exp, data,
1245                                 iattr, ea, ealen, ea2, ea2len, request);
1246                 if (rc == 0) {
1247                         body = lustre_msg_buf((*request)->rq_repmsg, 0,
1248                                               sizeof(*body));
1249                         LASSERT(body != NULL);
1250                         LASSERT(body->mds == data->fid1.mds);
1251                 }
1252         }
1253         RETURN(rc);
1254 }
1255
1256 int lmv_sync(struct obd_export *exp, struct ll_fid *fid,
1257              struct ptlrpc_request **request)
1258 {
1259         struct obd_device *obd = exp->exp_obd;
1260         struct lmv_obd *lmv = &obd->u.lmv;
1261         int rc;
1262         ENTRY;
1263
1264         rc = lmv_check_connect(obd);
1265         if (rc)
1266                 RETURN(rc);
1267
1268         rc = md_sync(lmv->tgts[fid->mds].ltd_exp, fid, request);
1269         RETURN(rc);
1270 }
1271
1272 int lmv_dirobj_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1273                             void *data, int flag)
1274 {
1275         struct lustre_handle lockh;
1276         struct lmv_obj *obj;
1277         int rc;
1278         ENTRY;
1279
1280         switch (flag) {
1281         case LDLM_CB_BLOCKING:
1282                 ldlm_lock2handle(lock, &lockh);
1283                 rc = ldlm_cli_cancel(&lockh);
1284                 if (rc < 0) {
1285                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
1286                         RETURN(rc);
1287                 }
1288                 break;
1289         case LDLM_CB_CANCELING:
1290                 /* time to drop cached attrs for dirobj */
1291                 obj = lock->l_ast_data;
1292                 if (obj) {
1293                         CDEBUG(D_OTHER, "cancel %s on "LPU64"/"LPU64
1294                                ", master %u/"LPU64"/%u\n",
1295                                lock->l_resource->lr_name.name[3] == 1 ?
1296                                         "LOOKUP" : "UPDATE",
1297                                lock->l_resource->lr_name.name[0],
1298                                lock->l_resource->lr_name.name[1], obj->fid.mds,
1299                                obj->fid.id, obj->fid.generation);
1300                         lmv_put_obj(obj);
1301                 }
1302                 break;
1303         default:
1304                 LBUG();
1305         }
1306         RETURN(0);
1307 }
1308
1309 void lmv_remove_dots(struct page *page)
1310 {
1311         char *kaddr = page_address(page);
1312         unsigned limit = PAGE_CACHE_SIZE;
1313         unsigned offs, rec_len;
1314         struct ext2_dir_entry_2 *p;
1315
1316         for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
1317                 p = (struct ext2_dir_entry_2 *)(kaddr + offs);
1318                 rec_len = le16_to_cpu(p->rec_len);
1319
1320                 if ((p->name_len == 1 && p->name[0] == '.') ||
1321                     (p->name_len == 2 && p->name[0] == '.' && p->name[1] == '.'))
1322                         p->inode = 0;
1323         }
1324 }
1325
1326 int lmv_readpage(struct obd_export *exp, struct ll_fid *mdc_fid,
1327                  __u64 offset, struct page *page,
1328                  struct ptlrpc_request **request)
1329 {
1330         struct obd_device *obd = exp->exp_obd;
1331         struct lmv_obd *lmv = &obd->u.lmv;
1332         struct ll_fid rfid = *mdc_fid;
1333         struct lmv_obj *obj;
1334         int rc, i;
1335         ENTRY;
1336
1337         rc = lmv_check_connect(obd);
1338         if (rc)
1339                 RETURN(rc);
1340
1341         LASSERT(mdc_fid->mds < lmv->desc.ld_tgt_count);
1342         CDEBUG(D_OTHER, "READPAGE at %llu from %lu/%lu/%lu\n",
1343                offset, (unsigned long) rfid.mds,
1344                (unsigned long) rfid.id,
1345                (unsigned long) rfid.generation);
1346
1347         obj = lmv_grab_obj(obd, mdc_fid);
1348         if (obj) {
1349                 lmv_lock_obj(obj);
1350
1351                 /* find dirobj containing page with requested offset. */
1352                 for (i = 0; i < obj->objcount; i++) {
1353                         if (offset < obj->objs[i].size)
1354                                 break;
1355                         offset -= obj->objs[i].size;
1356                 }
1357                 rfid = obj->objs[i].fid;
1358
1359                 lmv_unlock_obj(obj);
1360                 lmv_put_obj(obj);
1361
1362                 CDEBUG(D_OTHER, "forward to %lu/%lu/%lu with offset %lu\n",
1363                        (unsigned long)rfid.mds, (unsigned long)rfid.id,
1364                        (unsigned long)rfid.generation, (unsigned long)offset);
1365         }
1366         rc = md_readpage(lmv->tgts[rfid.mds].ltd_exp, &rfid, offset,
1367                          page, request);
1368
1369         if (rc == 0 && !fid_equal(&rfid, mdc_fid))
1370                 /* this page isn't from master object. To avoid "." and ".."
1371                  * duplication in directory, we have to remove them from all
1372                  * slave objects */
1373                 lmv_remove_dots(page);
1374
1375         RETURN(rc);
1376 }
1377
1378 int lmv_unlink_slaves(struct obd_export *exp, struct mdc_op_data *data,
1379                       struct ptlrpc_request **req)
1380 {
1381         struct obd_device *obd = exp->exp_obd;
1382         struct lmv_obd *lmv = &obd->u.lmv;
1383         struct mea *mea = data->mea1;
1384         struct mdc_op_data data2;
1385         int i, rc = 0, mds;
1386         ENTRY;
1387
1388         LASSERT(mea != NULL);
1389         for (i = 0; i < mea->mea_count; i++) {
1390                 memset(&data2, 0, sizeof(data2));
1391                 data2.fid1 = mea->mea_fids[i];
1392                 data2.create_mode = MDS_MODE_DONT_LOCK | S_IFDIR;
1393                 mds = data2.fid1.mds;
1394
1395                 if (lmv->tgts[mds].ltd_exp == NULL)
1396                         continue;
1397
1398                 rc = md_unlink(lmv->tgts[mds].ltd_exp, &data2, req);
1399                 CDEBUG(D_OTHER, "unlink slave %lu/%lu/%lu -> %d\n",
1400                        (unsigned long) mea->mea_fids[i].mds,
1401                        (unsigned long) mea->mea_fids[i].id,
1402                        (unsigned long) mea->mea_fids[i].generation, rc);
1403                 if (*req) {
1404                         ptlrpc_req_finished(*req);
1405                         *req = NULL;
1406                 }
1407                 if (rc)
1408                         break;
1409         }
1410         RETURN(rc);
1411 }
1412
1413 int lmv_delete_object(struct obd_export *exp, struct ll_fid *fid)
1414 {
1415         ENTRY;
1416
1417         if (!lmv_delete_obj(exp, fid)) {
1418                 CDEBUG(D_OTHER, "Object %lu/%lu/%lu is not found.\n",
1419                        (unsigned long)fid->mds, (unsigned long)fid->id,
1420                        (unsigned long)fid->generation);
1421         }
1422
1423         RETURN(0);
1424 }
1425
1426 int lmv_unlink(struct obd_export *exp, struct mdc_op_data *data,
1427                struct ptlrpc_request **request)
1428 {
1429         struct obd_device *obd = exp->exp_obd;
1430         struct lmv_obd *lmv = &obd->u.lmv;
1431         int rc, i = 0;
1432         ENTRY;
1433
1434         rc = lmv_check_connect(obd);
1435         if (rc)
1436                 RETURN(rc);
1437
1438         if (data->namelen == 0 && data->mea1 != NULL) {
1439                 /* mds asks to remove slave objects */
1440                 rc = lmv_unlink_slaves(exp, data, request);
1441                 RETURN(rc);
1442         } else if (data->namelen != 0) {
1443                 struct lmv_obj *obj;
1444
1445                 obj = lmv_grab_obj(obd, &data->fid1);
1446                 if (obj) {
1447                         i = raw_name2idx(obj->hashtype, obj->objcount, data->name,
1448                                          data->namelen);
1449                         data->fid1 = obj->objs[i].fid;
1450                         lmv_put_obj(obj);
1451                 }
1452                 CDEBUG(D_OTHER, "unlink '%*s' in %lu/%lu/%lu -> %u\n",
1453                        data->namelen, data->name,
1454                        (unsigned long) data->fid1.mds,
1455                        (unsigned long) data->fid1.id,
1456                        (unsigned long) data->fid1.generation, i);
1457         } else {
1458                 CDEBUG(D_OTHER, "drop i_nlink on %lu/%lu/%lu\n",
1459                        (unsigned long) data->fid1.mds,
1460                        (unsigned long) data->fid1.id,
1461                        (unsigned long) data->fid1.generation);
1462         }
1463         rc = md_unlink(lmv->tgts[data->fid1.mds].ltd_exp, data, request);
1464         RETURN(rc);
1465 }
1466
1467 struct obd_device *lmv_get_real_obd(struct obd_export *exp,
1468                                     char *name, int len)
1469 {
1470         struct obd_device *obd = exp->exp_obd;
1471         struct lmv_obd *lmv = &obd->u.lmv;
1472         int rc;
1473         ENTRY;
1474
1475         rc = lmv_check_connect(obd);
1476         if (rc)
1477                 RETURN(ERR_PTR(rc));
1478 #warning "we need well-desgined readdir() implementation to remove this mess"
1479         obd = lmv->tgts[0].ltd_exp->exp_obd;
1480         EXIT;
1481         return obd;
1482 }
1483
1484 int lmv_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
1485 {
1486         struct obd_device *obd = exp->exp_obd;
1487         struct lmv_obd *lmv = &obd->u.lmv;
1488         int i, rc = 0, change = 0;
1489         ENTRY;
1490
1491         if (lmv->max_easize < easize) {
1492                 lmv->max_easize = easize;
1493                 change = 1;
1494         }
1495         if (lmv->max_cookiesize < cookiesize) {
1496                 lmv->max_cookiesize = cookiesize;
1497                 change = 1;
1498         }
1499         if (change == 0)
1500                 RETURN(0);
1501
1502         if (lmv->connected == 0)
1503                 RETURN(0);
1504
1505         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1506                 if (lmv->tgts[i].ltd_exp == NULL) {
1507                         CWARN("%s: NULL export for %d\n", obd->obd_name, i);
1508                         continue;
1509                 }
1510
1511                 rc = obd_init_ea_size(lmv->tgts[i].ltd_exp, easize, cookiesize);
1512                 if (rc) {
1513                         CERROR("obd_init_ea_size() failed on MDT target %d, "
1514                                "error %d.\n", i, rc);
1515                         break;
1516                 }
1517         }
1518         RETURN(rc);
1519 }
1520
1521 int lmv_obd_create_single(struct obd_export *exp, struct obdo *oa,
1522                           struct lov_stripe_md **ea, struct obd_trans_info *oti)
1523 {
1524         struct obd_device *obd = exp->exp_obd;
1525         struct lmv_obd *lmv = &obd->u.lmv;
1526         struct lov_stripe_md obj_md;
1527         struct lov_stripe_md *obj_mdp = &obj_md;
1528         int rc = 0;
1529         ENTRY;
1530
1531         LASSERT(ea == NULL);
1532         LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
1533
1534         rc = obd_create(lmv->tgts[oa->o_mds].ltd_exp, oa, &obj_mdp, oti);
1535
1536         RETURN(rc);
1537 }
1538
1539 /*
1540  * to be called from MDS only
1541  */
1542 int lmv_obd_create(struct obd_export *exp, struct obdo *oa,
1543                    struct lov_stripe_md **ea, struct obd_trans_info *oti)
1544 {
1545         struct obd_device *obd = exp->exp_obd;
1546         struct lmv_obd *lmv = &obd->u.lmv;
1547         int i, c, rc = 0;
1548         struct mea *mea;
1549         struct ll_fid mfid;
1550         int lcount;
1551         ENTRY;
1552
1553         rc = lmv_check_connect(obd);
1554         if (rc)
1555                 RETURN(rc);
1556
1557         LASSERT(oa != NULL);
1558
1559         if (ea == NULL) {
1560                 rc = lmv_obd_create_single(exp, oa, NULL, oti);
1561                 RETURN(rc);
1562         }
1563
1564         if (*ea == NULL) {
1565                 rc = obd_alloc_diskmd(exp, (struct lov_mds_md **)ea);
1566                 if (rc < 0) {
1567                         CERROR("obd_alloc_diskmd() failed, error %d\n",
1568                                rc);
1569                         RETURN(rc);
1570                 }
1571
1572                 if (*ea == NULL)
1573                         RETURN(-EINVAL);
1574         }
1575
1576         rc = 0;
1577         mfid.id = oa->o_id;
1578         mfid.generation = oa->o_generation;
1579
1580         mea = (struct mea *)*ea;
1581         if (!mea->mea_count || mea->mea_count > lmv->desc.ld_tgt_count)
1582                 mea->mea_count = lmv->desc.ld_tgt_count;
1583         mea->mea_magic = MEA_MAGIC_ALL_CHARS;
1584
1585         mea->mea_master = -1;
1586         lcount = lmv->desc.ld_tgt_count;
1587         for (i = 0, c = 0; c < mea->mea_count && i < lcount; i++) {
1588                 struct lov_stripe_md obj_md;
1589                 struct lov_stripe_md *obj_mdp = &obj_md;
1590
1591                 if (lmv->tgts[i].ltd_exp == NULL) {
1592                         /* this is master MDS */
1593                         mea->mea_fids[c].id = mfid.id;
1594                         mea->mea_fids[c].generation = mfid.generation;
1595                         mea->mea_fids[c].mds = i;
1596                         mea->mea_master = i;
1597                         c++;
1598                         continue;
1599                 }
1600
1601                 /* "master" MDS should always be part of stripped dir, so scan
1602                    for it. */
1603                 if (mea->mea_master == -1 && c == mea->mea_count - 1)
1604                         continue;
1605
1606                 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLTYPE | OBD_MD_FLMODE
1607                         | OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLID;
1608
1609                 rc = obd_create(lmv->tgts[c].ltd_exp, oa, &obj_mdp, oti);
1610                 if (rc) {
1611                         CERROR("obd_create() failed on MDT target %d, "
1612                                "error %d\n", c, rc);
1613                         RETURN(rc);
1614                 }
1615
1616                 mea->mea_fids[c].id = oa->o_id;
1617                 mea->mea_fids[c].generation = oa->o_generation;
1618                 mea->mea_fids[c].mds = i;
1619                 c++;
1620                 CDEBUG(D_OTHER, "dirobj at mds %d: "LPU64"/%u\n",
1621                        i, oa->o_id, oa->o_generation);
1622         }
1623         LASSERT(c == mea->mea_count);
1624         CDEBUG(D_OTHER, "%d dirobjects created\n", (int) mea->mea_count);
1625
1626         RETURN(rc);
1627 }
1628
1629 static int lmv_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
1630                          struct obd_device *tgt, int count,
1631                          struct llog_catid *logid)
1632 {
1633         struct llog_ctxt *ctxt;
1634         int rc;
1635         ENTRY;
1636
1637         rc = obd_llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
1638                             &llog_client_ops);
1639         if (rc == 0) {
1640                 ctxt = llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT);
1641                 ctxt->loc_imp = tgt->u.cli.cl_import;
1642         }
1643
1644         RETURN(rc);
1645 }
1646
1647 static int lmv_llog_finish(struct obd_device *obd,
1648                            struct obd_llogs *llogs, int count)
1649 {
1650         int rc;
1651         ENTRY;
1652
1653         rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT));
1654         RETURN(rc);
1655 }
1656
1657 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
1658                         void *key, __u32 *vallen, void *val)
1659 {
1660         struct obd_device *obd;
1661         struct lmv_obd *lmv;
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 ll_fid) * 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         }
1693
1694         CDEBUG(D_IOCTL, "invalid key\n");
1695         RETURN(-EINVAL);
1696 }
1697
1698 int lmv_set_info(struct obd_export *exp, obd_count keylen,
1699                  void *key, obd_count vallen, void *val)
1700 {
1701         struct obd_device *obd;
1702         struct lmv_obd *lmv;
1703         ENTRY;
1704
1705         obd = class_exp2obd(exp);
1706         if (obd == NULL) {
1707                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1708                        exp->exp_handle.h_cookie);
1709                 RETURN(-EINVAL);
1710         }
1711         lmv = &obd->u.lmv;
1712
1713         if (keylen >= strlen("inter_mds") && strcmp(key, "inter_mds") == 0) {
1714                 lmv->server_timeout = 1;
1715                 lmv_set_timeouts(obd);
1716                 RETURN(0);
1717         }
1718
1719         RETURN(-EINVAL);
1720 }
1721
1722 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
1723                struct lov_stripe_md *lsm)
1724 {
1725         struct obd_device *obd = class_exp2obd(exp);
1726         struct lmv_obd *lmv = &obd->u.lmv;
1727         int mea_size;
1728         ENTRY;
1729
1730         mea_size = sizeof(struct ll_fid) *
1731                 lmv->desc.ld_tgt_count + sizeof(struct mea);
1732         if (!lmmp)
1733                 RETURN(mea_size);
1734
1735         if (*lmmp && !lsm) {
1736                 OBD_FREE(*lmmp, mea_size);
1737                 *lmmp = NULL;
1738                 RETURN(0);
1739         }
1740
1741         if (*lmmp == NULL) {
1742                 OBD_ALLOC(*lmmp, mea_size);
1743                 if (*lmmp == NULL)
1744                         RETURN(-ENOMEM);
1745         }
1746
1747         if (!lsm)
1748                 RETURN(mea_size);
1749
1750 #warning "MEA packing/convertation must be here! -bzzz"
1751         memcpy(*lmmp, lsm, mea_size);
1752         RETURN(mea_size);
1753 }
1754
1755 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **mem_tgt,
1756                  struct lov_mds_md *disk_src, int mdsize)
1757 {
1758         struct obd_device *obd = class_exp2obd(exp);
1759         struct lmv_obd *lmv = &obd->u.lmv;
1760         struct mea **tmea = (struct mea **) mem_tgt;
1761         struct mea *mea = (void *) disk_src;
1762         int mea_size;
1763         ENTRY;
1764
1765         mea_size = sizeof(struct ll_fid) *
1766                 lmv->desc.ld_tgt_count + sizeof(struct mea);
1767         if (mem_tgt == NULL)
1768                 return mea_size;
1769
1770         if (*mem_tgt != NULL && disk_src == NULL) {
1771                 OBD_FREE(*tmea, mea_size);
1772                 RETURN(0);
1773         }
1774
1775         LASSERT(mea_size == mdsize);
1776
1777         OBD_ALLOC(*tmea, mea_size);
1778         if (*tmea == NULL)
1779                 RETURN(-ENOMEM);
1780
1781         if (!disk_src)
1782                 RETURN(mea_size);
1783
1784 #warning "MEA unpacking/convertation must be here! -bzzz"
1785         memcpy(*tmea, mea, mdsize);
1786         RETURN(mea_size);
1787 }
1788
1789 int lmv_brw(int rw, struct obd_export *exp, struct obdo *oa,
1790             struct lov_stripe_md *ea, obd_count oa_bufs,
1791             struct brw_page *pgarr, struct obd_trans_info *oti)
1792 {
1793         struct obd_device *obd = exp->exp_obd;
1794         struct lmv_obd *lmv = &obd->u.lmv;
1795         struct mea *mea = (struct mea *) ea;
1796         int err;
1797
1798         LASSERT(oa != NULL);
1799         LASSERT(ea != NULL);
1800         LASSERT(pgarr != NULL);
1801         LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
1802
1803         oa->o_gr = mea->mea_fids[oa->o_mds].generation;
1804         oa->o_id = mea->mea_fids[oa->o_mds].id;
1805         oa->o_valid =  OBD_MD_FLID | OBD_MD_FLGROUP;
1806         err = obd_brw(rw, lmv->tgts[oa->o_mds].ltd_exp, oa,
1807                       NULL, oa_bufs, pgarr, oti);
1808         RETURN(err);
1809 }
1810
1811 struct obd_ops lmv_obd_ops = {
1812         .o_owner                = THIS_MODULE,
1813         .o_attach               = lmv_attach,
1814         .o_detach               = lmv_detach,
1815         .o_setup                = lmv_setup,
1816         .o_cleanup              = lmv_cleanup,
1817         .o_connect              = lmv_connect,
1818         .o_disconnect           = lmv_disconnect,
1819         .o_statfs               = lmv_statfs,
1820         .o_llog_init            = lmv_llog_init,
1821         .o_llog_finish          = lmv_llog_finish,
1822         .o_get_info             = lmv_get_info,
1823         .o_set_info             = lmv_set_info,
1824         .o_create               = lmv_obd_create,
1825         .o_packmd               = lmv_packmd,
1826         .o_unpackmd             = lmv_unpackmd,
1827         .o_brw                  = lmv_brw,
1828         .o_init_ea_size         = lmv_init_ea_size,
1829         .o_notify               = lmv_notify,
1830         .o_iocontrol            = lmv_iocontrol,
1831 };
1832
1833 struct md_ops lmv_md_ops = {
1834         .m_getstatus            = lmv_getstatus,
1835         .m_getattr              = lmv_getattr,
1836         .m_change_cbdata        = lmv_change_cbdata,
1837         .m_change_cbdata_name   = lmv_change_cbdata_name,
1838         .m_close                = lmv_close,
1839         .m_create               = lmv_create,
1840         .m_done_writing         = lmv_done_writing,
1841         .m_enqueue              = lmv_enqueue,
1842         .m_getattr_name         = lmv_getattr_name,
1843         .m_intent_lock          = lmv_intent_lock,
1844         .m_link                 = lmv_link,
1845         .m_rename               = lmv_rename,
1846         .m_setattr              = lmv_setattr,
1847         .m_sync                 = lmv_sync,
1848         .m_readpage             = lmv_readpage,
1849         .m_unlink               = lmv_unlink,
1850         .m_get_real_obd         = lmv_get_real_obd,
1851         .m_valid_attrs          = lmv_valid_attrs,
1852         .m_delete_object        = lmv_delete_object,
1853 };
1854
1855 int __init lmv_init(void)
1856 {
1857         struct lprocfs_static_vars lvars;
1858         int rc;
1859
1860         lprocfs_init_vars(lmv, &lvars);
1861         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
1862                                  lvars.module_vars, OBD_LMV_DEVICENAME);
1863         RETURN(rc);
1864 }
1865
1866 #ifdef __KERNEL__
1867 static void lmv_exit(void)
1868 {
1869         class_unregister_type(OBD_LMV_DEVICENAME);
1870 }
1871
1872 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1873 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
1874 MODULE_LICENSE("GPL");
1875
1876 module_init(lmv_init);
1877 module_exit(lmv_exit);
1878 #endif