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  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #ifndef EXPORT_SYMTAB
  38 # define EXPORT_SYMTAB
  39 #endif
  40 #define DEBUG_SUBSYSTEM S_LMV
  41 #ifdef __KERNEL__
  42 #include <linux/slab.h>
  43 #include <linux/module.h>
  44 #include <linux/init.h>
  45 #include <linux/slab.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/mm.h>
  48 #include <asm/div64.h>
  49 #include <linux/seq_file.h>
  50 #include <linux/namei.h>
  51 #else
  52 #include <liblustre.h>
  53 #endif
  54
  55 #include <lustre/lustre_idl.h>
  56 #include <lustre_log.h>
  57 #include <obd_support.h>
  58 #include <lustre_lib.h>
  59 #include <lustre_net.h>
  60 #include <obd_class.h>
  61 #include <lprocfs_status.h>
  62 #include <lustre_lite.h>
  63 #include <lustre_fid.h>
  64 #include "lmv_internal.h"
  65
  66 /* object cache. */
  67 cfs_mem_cache_t *lmv_object_cache;
  68 cfs_atomic_t lmv_object_count = CFS_ATOMIC_INIT(0);
  69
  70 static void lmv_activate_target(struct lmv_obd *lmv,
  71                                 struct lmv_tgt_desc *tgt,
  72                                 int activate)
  73 {
  74         if (tgt->ltd_active == activate)
  75                 return;
  76
  77         tgt->ltd_active = activate;
  78         lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
  79 }
  80
  81 /**
  82  * Error codes:
  83  *
  84  *  -EINVAL  : UUID can't be found in the LMV's target list
  85  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
  86  *  -EBADF   : The UUID is found, but the OBD of the wrong type (!)
  87  */
  88 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
  89                               int activate)
  90 {
  91         struct lmv_tgt_desc    *tgt;
  92         struct obd_device      *obd;
  93         int                     i;
  94         int                     rc = 0;
  95         ENTRY;
  96
  97         CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
  98                lmv, uuid->uuid, activate);
  99
 100         cfs_spin_lock(&lmv->lmv_lock);
 101         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 102                 if (tgt->ltd_exp == NULL)
 103                         continue;
 104
 105                 CDEBUG(D_INFO, "Target idx %d is %s conn "LPX64"\n",
 106                        i, tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
 107
 108                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 109                         break;
 110         }
 111
 112         if (i == lmv->desc.ld_tgt_count)
 113                 GOTO(out_lmv_lock, rc = -EINVAL);
 114
 115         obd = class_exp2obd(tgt->ltd_exp);
 116         if (obd == NULL)
 117                 GOTO(out_lmv_lock, rc = -ENOTCONN);
 118
 119         CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
 120                obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
 121                obd->obd_type->typ_name, i);
 122         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
 123
 124         if (tgt->ltd_active == activate) {
 125                 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
 126                        activate ? "" : "in");
 127                 GOTO(out_lmv_lock, rc);
 128         }
 129
 130         CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
 131                activate ? "" : "in");
 132         lmv_activate_target(lmv, tgt, activate);
 133         EXIT;
 134
 135  out_lmv_lock:
 136         cfs_spin_unlock(&lmv->lmv_lock);
 137         return rc;
 138 }
 139
 140 static int lmv_set_mdc_data(struct lmv_obd *lmv, struct obd_uuid *uuid,
 141                             struct obd_connect_data *data)
 142 {
 143         struct lmv_tgt_desc    *tgt;
 144         int                     i;
 145         ENTRY;
 146
 147         LASSERT(data != NULL);
 148
 149         cfs_spin_lock(&lmv->lmv_lock);
 150         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 151                 if (tgt->ltd_exp == NULL)
 152                         continue;
 153
 154                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 155                         lmv->datas[tgt->ltd_idx] = *data;
 156                         break;
 157                 }
 158         }
 159         cfs_spin_unlock(&lmv->lmv_lock);
 160         RETURN(0);
 161 }
 162
 163 struct obd_uuid *lmv_get_uuid(struct obd_export *exp) {
 164         struct obd_device *obd = exp->exp_obd;
 165         struct lmv_obd *lmv = &obd->u.lmv;
 166         return obd_get_uuid(lmv->tgts[0].ltd_exp);
 167 }
 168
 169 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
 170                       enum obd_notify_event ev, void *data)
 171 {
 172         struct obd_connect_data *conn_data;
 173         struct lmv_obd          *lmv = &obd->u.lmv;
 174         struct obd_uuid         *uuid;
 175         int                      rc = 0;
 176         ENTRY;
 177
 178         if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 179                 CERROR("unexpected notification of %s %s!\n",
 180                        watched->obd_type->typ_name,
 181                        watched->obd_name);
 182                 RETURN(-EINVAL);
 183         }
 184
 185         uuid = &watched->u.cli.cl_target_uuid;
 186         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
 187                 /*
 188                  * Set MDC as active before notifying the observer, so the
 189                  * observer can use the MDC normally.
 190                  */
 191                 rc = lmv_set_mdc_active(lmv, uuid,
 192                                         ev == OBD_NOTIFY_ACTIVE);
 193                 if (rc) {
 194                         CERROR("%sactivation of %s failed: %d\n",
 195                                ev == OBD_NOTIFY_ACTIVE ? "" : "de",
 196                                uuid->uuid, rc);
 197                         RETURN(rc);
 198                 }
 199         } else if (ev == OBD_NOTIFY_OCD) {
 200                 conn_data = &watched->u.cli.cl_import->imp_connect_data;
 201
 202                 /*
 203                  * Set connect data to desired target, update exp_connect_flags.
 204                  */
 205                 rc = lmv_set_mdc_data(lmv, uuid, conn_data);
 206                 if (rc) {
 207                         CERROR("can't set connect data to target %s, rc %d\n",
 208                                uuid->uuid, rc);
 209                         RETURN(rc);
 210                 }
 211
 212                 /*
 213                  * XXX: Make sure that ocd_connect_flags from all targets are
 214                  * the same. Otherwise one of MDTs runs wrong version or
 215                  * something like this.  --umka
 216                  */
 217                 obd->obd_self_export->exp_connect_flags =
 218                         conn_data->ocd_connect_flags;
 219         }
 220 #if 0
 221         else if (ev == OBD_NOTIFY_DISCON) {
 222                 /*
 223                  * For disconnect event, flush fld cache for failout MDS case.
 224                  */
 225                 fld_client_flush(&lmv->lmv_fld);
 226         }
 227 #endif
 228         /*
 229          * Pass the notification up the chain.
 230          */
 231         if (obd->obd_observer)
 232                 rc = obd_notify(obd->obd_observer, watched, ev, data);
 233
 234         RETURN(rc);
 235 }
 236
 237 /**
 238  * This is fake connect function. Its purpose is to initialize lmv and say
 239  * caller that everything is okay. Real connection will be performed later.
 240  */
 241 static int lmv_connect(const struct lu_env *env,
 242                        struct obd_export **exp, struct obd_device *obd,
 243                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 244                        void *localdata)
 245 {
 246 #ifdef __KERNEL__
 247         struct proc_dir_entry *lmv_proc_dir;
 248 #endif
 249         struct lmv_obd        *lmv = &obd->u.lmv;
 250         struct lustre_handle  conn = { 0 };
 251         int                    rc = 0;
 252         ENTRY;
 253
 254         /*
 255          * We don't want to actually do the underlying connections more than
 256          * once, so keep track.
 257          */
 258         lmv->refcount++;
 259         if (lmv->refcount > 1) {
 260                 *exp = NULL;
 261                 RETURN(0);
 262         }
 263
 264         rc = class_connect(&conn, obd, cluuid);
 265         if (rc) {
 266                 CERROR("class_connection() returned %d\n", rc);
 267                 RETURN(rc);
 268         }
 269
 270         *exp = class_conn2export(&conn);
 271         class_export_get(*exp);
 272
 273         lmv->exp = *exp;
 274         lmv->connected = 0;
 275         lmv->cluuid = *cluuid;
 276
 277         if (data)
 278                 lmv->conn_data = *data;
 279
 280 #ifdef __KERNEL__
 281         lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
 282                                         NULL, NULL);
 283         if (IS_ERR(lmv_proc_dir)) {
 284                 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
 285                        obd->obd_type->typ_name, obd->obd_name);
 286                 lmv_proc_dir = NULL;
 287         }
 288 #endif
 289
 290         /*
 291          * All real clients should perform actual connection right away, because
 292          * it is possible, that LMV will not have opportunity to connect targets
 293          * and MDC stuff will be called directly, for instance while reading
 294          * ../mdc/../kbytesfree procfs file, etc.
 295          */
 296         if (data->ocd_connect_flags & OBD_CONNECT_REAL)
 297                 rc = lmv_check_connect(obd);
 298
 299 #ifdef __KERNEL__
 300         if (rc) {
 301                 if (lmv_proc_dir)
 302                         lprocfs_remove(&lmv_proc_dir);
 303         }
 304 #endif
 305
 306         RETURN(rc);
 307 }
 308
 309 static void lmv_set_timeouts(struct obd_device *obd)
 310 {
 311         struct lmv_tgt_desc   *tgts;
 312         struct lmv_obd        *lmv;
 313         int                    i;
 314
 315         lmv = &obd->u.lmv;
 316         if (lmv->server_timeout == 0)
 317                 return;
 318
 319         if (lmv->connected == 0)
 320                 return;
 321
 322         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 323                 if (tgts->ltd_exp == NULL)
 324                         continue;
 325
 326                 obd_set_info_async(tgts->ltd_exp, sizeof(KEY_INTERMDS),
 327                                    KEY_INTERMDS, 0, NULL, NULL);
 328         }
 329 }
 330
 331 static int lmv_init_ea_size(struct obd_export *exp, int easize,
 332                             int def_easize, int cookiesize)
 333 {
 334         struct obd_device   *obd = exp->exp_obd;
 335         struct lmv_obd      *lmv = &obd->u.lmv;
 336         int                  i;
 337         int                  rc = 0;
 338         int                  change = 0;
 339         ENTRY;
 340
 341         if (lmv->max_easize < easize) {
 342                 lmv->max_easize = easize;
 343                 change = 1;
 344         }
 345         if (lmv->max_def_easize < def_easize) {
 346                 lmv->max_def_easize = def_easize;
 347                 change = 1;
 348         }
 349         if (lmv->max_cookiesize < cookiesize) {
 350                 lmv->max_cookiesize = cookiesize;
 351                 change = 1;
 352         }
 353         if (change == 0)
 354                 RETURN(0);
 355
 356         if (lmv->connected == 0)
 357                 RETURN(0);
 358
 359         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 360                 if (lmv->tgts[i].ltd_exp == NULL) {
 361                         CWARN("%s: NULL export for %d\n", obd->obd_name, i);
 362                         continue;
 363                 }
 364
 365                 rc = md_init_ea_size(lmv->tgts[i].ltd_exp, easize, def_easize,
 366                                      cookiesize);
 367                 if (rc) {
 368                         CERROR("obd_init_ea_size() failed on MDT target %d, "
 369                                "error %d.\n", i, rc);
 370                         break;
 371                 }
 372         }
 373         RETURN(rc);
 374 }
 375
 376 #define MAX_STRING_SIZE 128
 377
 378 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 379 {
 380 #ifdef __KERNEL__
 381         struct proc_dir_entry   *lmv_proc_dir;
 382 #endif
 383         struct lmv_obd          *lmv = &obd->u.lmv;
 384         struct obd_uuid         *cluuid = &lmv->cluuid;
 385         struct obd_connect_data *mdc_data = NULL;
 386         struct obd_uuid          lmv_mdc_uuid = { "LMV_MDC_UUID" };
 387         struct obd_device       *mdc_obd;
 388         struct obd_export       *mdc_exp;
 389         struct lu_fld_target     target;
 390         int                      rc;
 391         ENTRY;
 392
 393         mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
 394                                         &obd->obd_uuid);
 395         if (!mdc_obd) {
 396                 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
 397                 RETURN(-EINVAL);
 398         }
 399
 400         CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
 401                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 402                 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
 403                 cluuid->uuid);
 404
 405         if (!mdc_obd->obd_set_up) {
 406                 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
 407                 RETURN(-EINVAL);
 408         }
 409
 410         rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
 411                          &lmv->conn_data, NULL);
 412         if (rc) {
 413                 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
 414                 RETURN(rc);
 415         }
 416
 417         /*
 418          * Init fid sequence client for this mdc and add new fld target.
 419          */
 420         rc = obd_fid_init(mdc_exp);
 421         if (rc)
 422                 RETURN(rc);
 423
 424         target.ft_srv = NULL;
 425         target.ft_exp = mdc_exp;
 426         target.ft_idx = tgt->ltd_idx;
 427
 428         fld_client_add_target(&lmv->lmv_fld, &target);
 429
 430         mdc_data = &class_exp2cliimp(mdc_exp)->imp_connect_data;
 431
 432         rc = obd_register_observer(mdc_obd, obd);
 433         if (rc) {
 434                 obd_disconnect(mdc_exp);
 435                 CERROR("target %s register_observer error %d\n",
 436                        tgt->ltd_uuid.uuid, rc);
 437                 RETURN(rc);
 438         }
 439
 440         if (obd->obd_observer) {
 441                 /*
 442                  * Tell the observer about the new target.
 443                  */
 444                 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
 445                                 OBD_NOTIFY_ACTIVE, (void *)(tgt - lmv->tgts));
 446                 if (rc) {
 447                         obd_disconnect(mdc_exp);
 448                         RETURN(rc);
 449                 }
 450         }
 451
 452         tgt->ltd_active = 1;
 453         tgt->ltd_exp = mdc_exp;
 454         lmv->desc.ld_active_tgt_count++;
 455
 456         /*
 457          * Copy connect data, it may be used later.
 458          */
 459         lmv->datas[tgt->ltd_idx] = *mdc_data;
 460
 461         md_init_ea_size(tgt->ltd_exp, lmv->max_easize,
 462                         lmv->max_def_easize, lmv->max_cookiesize);
 463
 464         CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
 465                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 466                 cfs_atomic_read(&obd->obd_refcount));
 467
 468 #ifdef __KERNEL__
 469         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 470         if (lmv_proc_dir) {
 471                 struct proc_dir_entry *mdc_symlink;
 472
 473                 LASSERT(mdc_obd->obd_type != NULL);
 474                 LASSERT(mdc_obd->obd_type->typ_name != NULL);
 475                 mdc_symlink = lprocfs_add_symlink(mdc_obd->obd_name,
 476                                                   lmv_proc_dir,
 477                                                   "../../../%s/%s",
 478                                                   mdc_obd->obd_type->typ_name,
 479                                                   mdc_obd->obd_name);
 480                 if (mdc_symlink == NULL) {
 481                         CERROR("Could not register LMV target "
 482                                "/proc/fs/lustre/%s/%s/target_obds/%s.",
 483                                obd->obd_type->typ_name, obd->obd_name,
 484                                mdc_obd->obd_name);
 485                         lprocfs_remove(&lmv_proc_dir);
 486                         lmv_proc_dir = NULL;
 487                 }
 488         }
 489 #endif
 490         RETURN(0);
 491 }
 492
 493 int lmv_add_target(struct obd_device *obd, struct obd_uuid *tgt_uuid)
 494 {
 495         struct lmv_obd      *lmv = &obd->u.lmv;
 496         struct lmv_tgt_desc *tgt;
 497         int                  rc = 0;
 498         ENTRY;
 499
 500         CDEBUG(D_CONFIG, "Target uuid: %s.\n", tgt_uuid->uuid);
 501
 502         lmv_init_lock(lmv);
 503
 504         if (lmv->desc.ld_active_tgt_count >= LMV_MAX_TGT_COUNT) {
 505                 lmv_init_unlock(lmv);
 506                 CERROR("Can't add %s, LMV module compiled for %d MDCs. "
 507                        "That many MDCs already configured.\n",
 508                        tgt_uuid->uuid, LMV_MAX_TGT_COUNT);
 509                 RETURN(-EINVAL);
 510         }
 511         if (lmv->desc.ld_tgt_count == 0) {
 512                 struct obd_device *mdc_obd;
 513
 514                 mdc_obd = class_find_client_obd(tgt_uuid, LUSTRE_MDC_NAME,
 515                                                 &obd->obd_uuid);
 516                 if (!mdc_obd) {
 517                         lmv_init_unlock(lmv);
 518                         CERROR("Target %s not attached\n", tgt_uuid->uuid);
 519                         RETURN(-EINVAL);
 520                 }
 521
 522                 rc = obd_llog_init(obd, &obd->obd_olg, mdc_obd, NULL);
 523                 if (rc) {
 524                         lmv_init_unlock(lmv);
 525                         CERROR("lmv failed to setup llogging subsystems\n");
 526                 }
 527         }
 528         cfs_spin_lock(&lmv->lmv_lock);
 529         tgt = lmv->tgts + lmv->desc.ld_tgt_count++;
 530         tgt->ltd_uuid = *tgt_uuid;
 531         cfs_spin_unlock(&lmv->lmv_lock);
 532
 533         if (lmv->connected) {
 534                 rc = lmv_connect_mdc(obd, tgt);
 535                 if (rc) {
 536                         cfs_spin_lock(&lmv->lmv_lock);
 537                         lmv->desc.ld_tgt_count--;
 538                         memset(tgt, 0, sizeof(*tgt));
 539                         cfs_spin_unlock(&lmv->lmv_lock);
 540                 } else {
 541                         int easize = sizeof(struct lmv_stripe_md) +
 542                                      lmv->desc.ld_tgt_count *
 543                                      sizeof(struct lu_fid);
 544                         lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
 545                 }
 546         }
 547
 548         lmv_init_unlock(lmv);
 549         RETURN(rc);
 550 }
 551
 552 int lmv_check_connect(struct obd_device *obd)
 553 {
 554         struct lmv_obd       *lmv = &obd->u.lmv;
 555         struct lmv_tgt_desc  *tgt;
 556         int                   i;
 557         int                   rc;
 558         int                   easize;
 559         ENTRY;
 560
 561         if (lmv->connected)
 562                 RETURN(0);
 563
 564         lmv_init_lock(lmv);
 565         if (lmv->connected) {
 566                 lmv_init_unlock(lmv);
 567                 RETURN(0);
 568         }
 569
 570         if (lmv->desc.ld_tgt_count == 0) {
 571                 CERROR("%s: no targets configured.\n", obd->obd_name);
 572                 RETURN(-EINVAL);
 573         }
 574
 575         CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
 576                lmv->cluuid.uuid, obd->obd_name);
 577
 578         LASSERT(lmv->tgts != NULL);
 579
 580         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 581                 rc = lmv_connect_mdc(obd, tgt);
 582                 if (rc)
 583                         GOTO(out_disc, rc);
 584         }
 585
 586         lmv_set_timeouts(obd);
 587         class_export_put(lmv->exp);
 588         lmv->connected = 1;
 589         easize = lmv_get_easize(lmv);
 590         lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
 591         lmv_init_unlock(lmv);
 592         RETURN(0);
 593
 594  out_disc:
 595         while (i-- > 0) {
 596                 int rc2;
 597                 --tgt;
 598                 tgt->ltd_active = 0;
 599                 if (tgt->ltd_exp) {
 600                         --lmv->desc.ld_active_tgt_count;
 601                         rc2 = obd_disconnect(tgt->ltd_exp);
 602                         if (rc2) {
 603                                 CERROR("LMV target %s disconnect on "
 604                                        "MDC idx %d: error %d\n",
 605                                        tgt->ltd_uuid.uuid, i, rc2);
 606                         }
 607                 }
 608         }
 609         class_disconnect(lmv->exp);
 610         lmv_init_unlock(lmv);
 611         RETURN(rc);
 612 }
 613
 614 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 615 {
 616 #ifdef __KERNEL__
 617         struct proc_dir_entry  *lmv_proc_dir;
 618 #endif
 619         struct lmv_obd         *lmv = &obd->u.lmv;
 620         struct obd_device      *mdc_obd;
 621         int                     rc;
 622         ENTRY;
 623
 624         LASSERT(tgt != NULL);
 625         LASSERT(obd != NULL);
 626
 627         mdc_obd = class_exp2obd(tgt->ltd_exp);
 628
 629         if (mdc_obd)
 630                 mdc_obd->obd_no_recov = obd->obd_no_recov;
 631
 632 #ifdef __KERNEL__
 633         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 634         if (lmv_proc_dir) {
 635                 struct proc_dir_entry *mdc_symlink;
 636
 637                 mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
 638                 if (mdc_symlink) {
 639                         lprocfs_remove(&mdc_symlink);
 640                 } else {
 641                         CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
 642                                obd->obd_type->typ_name, obd->obd_name,
 643                                mdc_obd->obd_name);
 644                 }
 645         }
 646 #endif
 647         rc = obd_fid_fini(tgt->ltd_exp);
 648         if (rc)
 649                 CERROR("Can't finanize fids factory\n");
 650
 651         CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
 652                tgt->ltd_exp->exp_obd->obd_name,
 653                tgt->ltd_exp->exp_obd->obd_uuid.uuid);
 654
 655         obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
 656         rc = obd_disconnect(tgt->ltd_exp);
 657         if (rc) {
 658                 if (tgt->ltd_active) {
 659                         CERROR("Target %s disconnect error %d\n",
 660                                tgt->ltd_uuid.uuid, rc);
 661                 }
 662         }
 663
 664         lmv_activate_target(lmv, tgt, 0);
 665         tgt->ltd_exp = NULL;
 666         RETURN(0);
 667 }
 668
 669 static int lmv_disconnect(struct obd_export *exp)
 670 {
 671         struct obd_device     *obd = class_exp2obd(exp);
 672 #ifdef __KERNEL__
 673         struct proc_dir_entry *lmv_proc_dir;
 674 #endif
 675         struct lmv_obd        *lmv = &obd->u.lmv;
 676         int                    rc;
 677         int                    i;
 678         ENTRY;
 679
 680         if (!lmv->tgts)
 681                 goto out_local;
 682
 683         /*
 684          * Only disconnect the underlying layers on the final disconnect.
 685          */
 686         lmv->refcount--;
 687         if (lmv->refcount != 0)
 688                 goto out_local;
 689
 690         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 691                 if (lmv->tgts[i].ltd_exp == NULL)
 692                         continue;
 693                 lmv_disconnect_mdc(obd, &lmv->tgts[i]);
 694         }
 695
 696 #ifdef __KERNEL__
 697         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 698         if (lmv_proc_dir) {
 699                 lprocfs_remove(&lmv_proc_dir);
 700         } else {
 701                 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
 702                        obd->obd_type->typ_name, obd->obd_name);
 703         }
 704 #endif
 705
 706 out_local:
 707         /*
 708          * This is the case when no real connection is established by
 709          * lmv_check_connect().
 710          */
 711         if (!lmv->connected)
 712                 class_export_put(exp);
 713         rc = class_disconnect(exp);
 714         if (lmv->refcount == 0)
 715                 lmv->connected = 0;
 716         RETURN(rc);
 717 }
 718
 719 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 720                          int len, void *karg, void *uarg)
 721 {
 722         struct obd_device    *obddev = class_exp2obd(exp);
 723         struct lmv_obd       *lmv = &obddev->u.lmv;
 724         int                   i = 0;
 725         int                   rc = 0;
 726         int                   set = 0;
 727         int                   count = lmv->desc.ld_tgt_count;
 728         ENTRY;
 729
 730         if (count == 0)
 731                 RETURN(-ENOTTY);
 732
 733         switch (cmd) {
 734         case IOC_OBD_STATFS: {
 735                 struct obd_ioctl_data *data = karg;
 736                 struct obd_device *mdc_obd;
 737                 struct obd_statfs stat_buf = {0};
 738                 __u32 index;
 739
 740                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
 741                 if ((index >= count))
 742                         RETURN(-ENODEV);
 743
 744                 if (!lmv->tgts[index].ltd_active)
 745                         RETURN(-ENODATA);
 746
 747                 mdc_obd = class_exp2obd(lmv->tgts[index].ltd_exp);
 748                 if (!mdc_obd)
 749                         RETURN(-EINVAL);
 750
 751                 rc = obd_statfs(mdc_obd, &stat_buf,
 752                                 cfs_time_current_64() - CFS_HZ, 0);
 753                 if (rc)
 754                         RETURN(rc);
 755                 if (cfs_copy_to_user(data->ioc_pbuf1, &stat_buf,
 756                                      data->ioc_plen1))
 757                         RETURN(-EFAULT);
 758                 if (cfs_copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
 759                                      data->ioc_plen2))
 760                         RETURN(-EFAULT);
 761                 break;
 762         }
 763         case OBD_IOC_QUOTACTL: {
 764                 struct if_quotactl *qctl = karg;
 765                 struct lmv_tgt_desc *tgt = NULL;
 766                 struct obd_quotactl *oqctl;
 767
 768                 if (qctl->qc_valid == QC_MDTIDX) {
 769                         if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
 770                                 RETURN(-EINVAL);
 771
 772                         tgt = &lmv->tgts[qctl->qc_idx];
 773                         if (!tgt->ltd_exp)
 774                                 RETURN(-EINVAL);
 775                 } else if (qctl->qc_valid == QC_UUID) {
 776                         for (i = 0; i < count; i++) {
 777                                 tgt = &lmv->tgts[i];
 778                                 if (!obd_uuid_equals(&tgt->ltd_uuid,
 779                                                      &qctl->obd_uuid))
 780                                         continue;
 781
 782                                 if (tgt->ltd_exp == NULL)
 783                                         RETURN(-EINVAL);
 784
 785                                 break;
 786                         }
 787                 } else {
 788                         RETURN(-EINVAL);
 789                 }
 790
 791                 if (i >= count)
 792                         RETURN(-EAGAIN);
 793
 794                 LASSERT(tgt && tgt->ltd_exp);
 795                 OBD_ALLOC_PTR(oqctl);
 796                 if (!oqctl)
 797                         RETURN(-ENOMEM);
 798
 799                 QCTL_COPY(oqctl, qctl);
 800                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
 801                 if (rc == 0) {
 802                         QCTL_COPY(qctl, oqctl);
 803                         qctl->qc_valid = QC_MDTIDX;
 804                         qctl->obd_uuid = tgt->ltd_uuid;
 805                 }
 806                 OBD_FREE_PTR(oqctl);
 807                 break;
 808         }
 809         case OBD_IOC_CHANGELOG_CLEAR: {
 810                 struct ioc_changelog_clear *icc = karg;
 811
 812                 if (icc->icc_mdtindex >= count)
 813                         RETURN(-ENODEV);
 814
 815                 rc = obd_iocontrol(cmd, lmv->tgts[icc->icc_mdtindex].ltd_exp,
 816                                    sizeof(*icc), icc, NULL);
 817                 break;
 818         }
 819
 820         default : {
 821                 for (i = 0; i < count; i++) {
 822                         int err;
 823
 824                         if (lmv->tgts[i].ltd_exp == NULL)
 825                                 continue;
 826
 827                         err = obd_iocontrol(cmd, lmv->tgts[i].ltd_exp, len,
 828                                             karg, uarg);
 829                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
 830                                 RETURN(err);
 831                         } else if (err) {
 832                                 if (lmv->tgts[i].ltd_active) {
 833                                         CERROR("error: iocontrol MDC %s on MDT"
 834                                                "idx %d cmd %x: err = %d\n",
 835                                                 lmv->tgts[i].ltd_uuid.uuid,
 836                                                 i, cmd, err);
 837                                         if (!rc)
 838                                                 rc = err;
 839                                 }
 840                         } else
 841                                 set = 1;
 842                 }
 843                 if (!set && !rc)
 844                         rc = -EIO;
 845         }
 846         }
 847         RETURN(rc);
 848 }
 849
 850 static int lmv_all_chars_policy(int count, const char *name,
 851                                 int len)
 852 {
 853         unsigned int c = 0;
 854
 855         while (len > 0)
 856                 c += name[--len];
 857         c = c % count;
 858         return c;
 859 }
 860
 861 static int lmv_nid_policy(struct lmv_obd *lmv)
 862 {
 863         struct obd_import *imp;
 864         __u32              id;
 865
 866         /*
 867          * XXX: To get nid we assume that underlying obd device is mdc.
 868          */
 869         imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
 870         id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
 871         return id % lmv->desc.ld_tgt_count;
 872 }
 873
 874 static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
 875                           placement_policy_t placement)
 876 {
 877         switch (placement) {
 878         case PLACEMENT_CHAR_POLICY:
 879                 return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
 880                                             op_data->op_name,
 881                                             op_data->op_namelen);
 882         case PLACEMENT_NID_POLICY:
 883                 return lmv_nid_policy(lmv);
 884
 885         default:
 886                 break;
 887         }
 888
 889         CERROR("Unsupported placement policy %x\n", placement);
 890         return -EINVAL;
 891 }
 892
 893 /**
 894  * This is _inode_ placement policy function (not name).
 895  */
 896 static int lmv_placement_policy(struct obd_device *obd,
 897                                 struct md_op_data *op_data,
 898                                 mdsno_t *mds)
 899 {
 900         struct lmv_obd          *lmv = &obd->u.lmv;
 901         struct lmv_object       *obj;
 902         int                      rc;
 903         ENTRY;
 904
 905         LASSERT(mds != NULL);
 906
 907         if (lmv->desc.ld_tgt_count == 1) {
 908                 *mds = 0;
 909                 RETURN(0);
 910         }
 911
 912         /*
 913          * Allocate new fid on target according to operation type and parent
 914          * home mds.
 915          */
 916         obj = lmv_object_find(obd, &op_data->op_fid1);
 917         if (obj != NULL || op_data->op_name == NULL ||
 918             op_data->op_opc != LUSTRE_OPC_MKDIR) {
 919                 /*
 920                  * Allocate fid for non-dir or for null name or for case parent
 921                  * dir is split.
 922                  */
 923                 if (obj) {
 924                         lmv_object_put(obj);
 925
 926                         /*
 927                          * If we have this flag turned on, and we see that
 928                          * parent dir is split, this means, that caller did not
 929                          * notice split yet. This is race and we would like to
 930                          * let caller know that.
 931                          */
 932                         if (op_data->op_bias & MDS_CHECK_SPLIT)
 933                                 RETURN(-ERESTART);
 934                 }
 935
 936                 /*
 937                  * Allocate new fid on same mds where parent fid is located and
 938                  * where operation will be sent. In case of split dir, ->op_fid1
 939                  * and ->op_mds here will contain fid and mds of slave directory
 940                  * object (assigned by caller).
 941                  */
 942                 *mds = op_data->op_mds;
 943                 rc = 0;
 944         } else {
 945                 /*
 946                  * Parent directory is not split and we want to create a
 947                  * directory in it. Let's calculate where to place it according
 948                  * to operation data @op_data.
 949                  */
 950                 *mds = lmv_choose_mds(lmv, op_data, lmv->lmv_placement);
 951                 rc = 0;
 952         }
 953
 954         if (rc) {
 955                 CERROR("Can't choose MDS, err = %d\n", rc);
 956         } else {
 957                 LASSERT(*mds < lmv->desc.ld_tgt_count);
 958         }
 959
 960         RETURN(rc);
 961 }
 962
 963 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid,
 964                     mdsno_t mds)
 965 {
 966         struct lmv_tgt_desc *tgt;
 967         int                  rc;
 968         ENTRY;
 969
 970         tgt = lmv_get_target(lmv, mds);
 971
 972         /*
 973          * New seq alloc and FLD setup should be atomic. Otherwise we may find
 974          * on server that seq in new allocated fid is not yet known.
 975          */
 976         cfs_down(&tgt->ltd_fid_sem);
 977
 978         if (!tgt->ltd_active)
 979                 GOTO(out, rc = -ENODEV);
 980
 981         /*
 982          * Asking underlaying tgt layer to allocate new fid.
 983          */
 984         rc = obd_fid_alloc(tgt->ltd_exp, fid, NULL);
 985         if (rc > 0) {
 986                 LASSERT(fid_is_sane(fid));
 987                 rc = 0;
 988         }
 989
 990         EXIT;
 991 out:
 992         cfs_up(&tgt->ltd_fid_sem);
 993         return rc;
 994 }
 995
 996 int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
 997                   struct md_op_data *op_data)
 998 {
 999         struct obd_device     *obd = class_exp2obd(exp);
1000         struct lmv_obd        *lmv = &obd->u.lmv;
1001         mdsno_t                mds;
1002         int                    rc;
1003         ENTRY;
1004
1005         LASSERT(op_data != NULL);
1006         LASSERT(fid != NULL);
1007
1008         rc = lmv_placement_policy(obd, op_data, &mds);
1009         if (rc) {
1010                 CERROR("Can't get target for allocating fid, "
1011                        "rc %d\n", rc);
1012                 RETURN(rc);
1013         }
1014
1015         rc = __lmv_fid_alloc(lmv, fid, mds);
1016         if (rc) {
1017                 CERROR("Can't alloc new fid, rc %d\n", rc);
1018                 RETURN(rc);
1019         }
1020
1021         RETURN(rc);
1022 }
1023
1024 static int lmv_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
1025 {
1026         ENTRY;
1027         LASSERT(exp != NULL && fid != NULL);
1028         if (lmv_object_delete(exp, fid)) {
1029                 CDEBUG(D_INODE, "Object "DFID" is destroyed.\n",
1030                        PFID(fid));
1031         }
1032         RETURN(0);
1033 }
1034
1035 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1036 {
1037         struct lmv_obd             *lmv = &obd->u.lmv;
1038         struct lprocfs_static_vars  lvars;
1039         struct lmv_desc            *desc;
1040         int                         rc;
1041         int                         i = 0;
1042         ENTRY;
1043
1044         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1045                 CERROR("LMV setup requires a descriptor\n");
1046                 RETURN(-EINVAL);
1047         }
1048
1049         desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1050         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1051                 CERROR("Lmv descriptor size wrong: %d > %d\n",
1052                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1053                 RETURN(-EINVAL);
1054         }
1055
1056         lmv->tgts_size = LMV_MAX_TGT_COUNT * sizeof(struct lmv_tgt_desc);
1057
1058         OBD_ALLOC(lmv->tgts, lmv->tgts_size);
1059         if (lmv->tgts == NULL)
1060                 RETURN(-ENOMEM);
1061
1062         for (i = 0; i < LMV_MAX_TGT_COUNT; i++) {
1063                 cfs_sema_init(&lmv->tgts[i].ltd_fid_sem, 1);
1064                 lmv->tgts[i].ltd_idx = i;
1065         }
1066
1067         lmv->datas_size = LMV_MAX_TGT_COUNT * sizeof(struct obd_connect_data);
1068
1069         OBD_ALLOC(lmv->datas, lmv->datas_size);
1070         if (lmv->datas == NULL)
1071                 GOTO(out_free_tgts, rc = -ENOMEM);
1072
1073         obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1074         lmv->desc.ld_tgt_count = 0;
1075         lmv->desc.ld_active_tgt_count = 0;
1076         lmv->max_cookiesize = 0;
1077         lmv->max_def_easize = 0;
1078         lmv->max_easize = 0;
1079         lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
1080
1081         cfs_spin_lock_init(&lmv->lmv_lock);
1082         cfs_sema_init(&lmv->init_sem, 1);
1083
1084         rc = lmv_object_setup(obd);
1085         if (rc) {
1086                 CERROR("Can't setup LMV object manager, error %d.\n", rc);
1087                 GOTO(out_free_datas, rc);
1088         }
1089
1090         lprocfs_lmv_init_vars(&lvars);
1091         lprocfs_obd_setup(obd, lvars.obd_vars);
1092 #ifdef LPROCFS
1093         {
1094                 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd_status",
1095                                         0444, &lmv_proc_target_fops, obd);
1096                 if (rc)
1097                         CWARN("Error adding target_obd_stats file (%d)\n", rc);
1098        }
1099 #endif
1100         rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1101                              LUSTRE_CLI_FLD_HASH_DHT);
1102         if (rc) {
1103                 CERROR("Can't init FLD, err %d\n", rc);
1104                 GOTO(out_free_datas, rc);
1105         }
1106
1107         RETURN(0);
1108
1109 out_free_datas:
1110         OBD_FREE(lmv->datas, lmv->datas_size);
1111         lmv->datas = NULL;
1112 out_free_tgts:
1113         OBD_FREE(lmv->tgts, lmv->tgts_size);
1114         lmv->tgts = NULL;
1115         return rc;
1116 }
1117
1118 static int lmv_cleanup(struct obd_device *obd)
1119 {
1120         struct lmv_obd   *lmv = &obd->u.lmv;
1121         ENTRY;
1122
1123         fld_client_fini(&lmv->lmv_fld);
1124         lprocfs_obd_cleanup(obd);
1125         lmv_object_cleanup(obd);
1126         OBD_FREE(lmv->datas, lmv->datas_size);
1127         OBD_FREE(lmv->tgts, lmv->tgts_size);
1128
1129         RETURN(0);
1130 }
1131
1132 static int lmv_process_config(struct obd_device *obd, obd_count len, void *buf)
1133 {
1134         struct lustre_cfg     *lcfg = buf;
1135         struct obd_uuid        tgt_uuid;
1136         int                    rc;
1137         ENTRY;
1138
1139         switch(lcfg->lcfg_command) {
1140         case LCFG_ADD_MDC:
1141                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(tgt_uuid.uuid))
1142                         GOTO(out, rc = -EINVAL);
1143
1144                 obd_str2uuid(&tgt_uuid, lustre_cfg_string(lcfg, 1));
1145                 rc = lmv_add_target(obd, &tgt_uuid);
1146                 GOTO(out, rc);
1147         default: {
1148                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1149                 GOTO(out, rc = -EINVAL);
1150         }
1151         }
1152 out:
1153         RETURN(rc);
1154 }
1155
1156 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1157                       __u64 max_age, __u32 flags)
1158 {
1159         struct lmv_obd        *lmv = &obd->u.lmv;
1160         struct obd_statfs     *temp;
1161         int                    rc = 0;
1162         int                    i;
1163         ENTRY;
1164
1165         rc = lmv_check_connect(obd);
1166         if (rc)
1167                 RETURN(rc);
1168
1169         OBD_ALLOC(temp, sizeof(*temp));
1170         if (temp == NULL)
1171                 RETURN(-ENOMEM);
1172
1173         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1174                 if (lmv->tgts[i].ltd_exp == NULL)
1175                         continue;
1176
1177                 rc = obd_statfs(lmv->tgts[i].ltd_exp->exp_obd, temp,
1178                                 max_age, flags);
1179                 if (rc) {
1180                         CERROR("can't stat MDS #%d (%s), error %d\n", i,
1181                                lmv->tgts[i].ltd_exp->exp_obd->obd_name,
1182                                rc);
1183                         GOTO(out_free_temp, rc);
1184                 }
1185                 if (i == 0) {
1186                         *osfs = *temp;
1187                 } else {
1188                         osfs->os_bavail += temp->os_bavail;
1189                         osfs->os_blocks += temp->os_blocks;
1190                         osfs->os_ffree += temp->os_ffree;
1191                         osfs->os_files += temp->os_files;
1192                 }
1193         }
1194
1195         EXIT;
1196 out_free_temp:
1197         OBD_FREE(temp, sizeof(*temp));
1198         return rc;
1199 }
1200
1201 static int lmv_getstatus(struct obd_export *exp,
1202                          struct lu_fid *fid,
1203                          struct obd_capa **pc)
1204 {
1205         struct obd_device    *obd = exp->exp_obd;
1206         struct lmv_obd       *lmv = &obd->u.lmv;
1207         int                   rc;
1208         ENTRY;
1209
1210         rc = lmv_check_connect(obd);
1211         if (rc)
1212                 RETURN(rc);
1213
1214         rc = md_getstatus(lmv->tgts[0].ltd_exp, fid, pc);
1215         RETURN(rc);
1216 }
1217
1218 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1219                         struct obd_capa *oc, obd_valid valid, const char *name,
1220                         const char *input, int input_size, int output_size,
1221                         int flags, struct ptlrpc_request **request)
1222 {
1223         struct obd_device      *obd = exp->exp_obd;
1224         struct lmv_obd         *lmv = &obd->u.lmv;
1225         struct lmv_tgt_desc    *tgt;
1226         int                     rc;
1227         ENTRY;
1228
1229         rc = lmv_check_connect(obd);
1230         if (rc)
1231                 RETURN(rc);
1232
1233         tgt = lmv_find_target(lmv, fid);
1234         if (IS_ERR(tgt))
1235                 RETURN(PTR_ERR(tgt));
1236
1237         rc = md_getxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1238                          input_size, output_size, flags, request);
1239
1240         RETURN(rc);
1241 }
1242
1243 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1244                         struct obd_capa *oc, obd_valid valid, const char *name,
1245                         const char *input, int input_size, int output_size,
1246                         int flags, __u32 suppgid,
1247                         struct ptlrpc_request **request)
1248 {
1249         struct obd_device      *obd = exp->exp_obd;
1250         struct lmv_obd         *lmv = &obd->u.lmv;
1251         struct lmv_tgt_desc    *tgt;
1252         int                     rc;
1253         ENTRY;
1254
1255         rc = lmv_check_connect(obd);
1256         if (rc)
1257                 RETURN(rc);
1258
1259         tgt = lmv_find_target(lmv, fid);
1260         if (IS_ERR(tgt))
1261                 RETURN(PTR_ERR(tgt));
1262
1263         rc = md_setxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1264                          input_size, output_size, flags, suppgid,
1265                          request);
1266
1267         RETURN(rc);
1268 }
1269
1270 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1271                        struct ptlrpc_request **request)
1272 {
1273         struct obd_device       *obd = exp->exp_obd;
1274         struct lmv_obd          *lmv = &obd->u.lmv;
1275         struct lmv_tgt_desc     *tgt;
1276         struct lmv_object       *obj;
1277         int                      rc;
1278         int                      i;
1279         ENTRY;
1280
1281         rc = lmv_check_connect(obd);
1282         if (rc)
1283                 RETURN(rc);
1284
1285         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1286         if (IS_ERR(tgt))
1287                 RETURN(PTR_ERR(tgt));
1288
1289         if (op_data->op_valid & OBD_MD_MDTIDX) {
1290                 op_data->op_mds = tgt->ltd_idx;
1291                 RETURN(0);
1292         }
1293
1294         rc = md_getattr(tgt->ltd_exp, op_data, request);
1295         if (rc)
1296                 RETURN(rc);
1297
1298         obj = lmv_object_find_lock(obd, &op_data->op_fid1);
1299
1300         CDEBUG(D_INODE, "GETATTR for "DFID" %s\n", PFID(&op_data->op_fid1),
1301                obj ? "(split)" : "");
1302
1303         /*
1304          * If object is split, then we loop over all the slaves and gather size
1305          * attribute. In ideal world we would have to gather also mds field from
1306          * all slaves, as object is spread over the cluster and this is
1307          * definitely interesting information and it is not good to loss it,
1308          * but...
1309          */
1310         if (obj) {
1311                 struct mdt_body *body;
1312
1313                 if (*request == NULL) {
1314                         lmv_object_put(obj);
1315                         RETURN(rc);
1316                 }
1317
1318                 body = req_capsule_server_get(&(*request)->rq_pill,
1319                                               &RMF_MDT_BODY);
1320                 LASSERT(body != NULL);
1321
1322                 for (i = 0; i < obj->lo_objcount; i++) {
1323                         if (lmv->tgts[i].ltd_exp == NULL) {
1324                                 CWARN("%s: NULL export for %d\n",
1325                                       obd->obd_name, i);
1326                                 continue;
1327                         }
1328
1329                         /*
1330                          * Skip master object.
1331                          */
1332                         if (lu_fid_eq(&obj->lo_fid, &obj->lo_stripes[i].ls_fid))
1333                                 continue;
1334
1335                         body->size += obj->lo_stripes[i].ls_size;
1336                 }
1337
1338                 lmv_object_put_unlock(obj);
1339         }
1340
1341         RETURN(rc);
1342 }
1343
1344 static int lmv_change_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1345                              ldlm_iterator_t it, void *data)
1346 {
1347         struct obd_device   *obd = exp->exp_obd;
1348         struct lmv_obd      *lmv = &obd->u.lmv;
1349         int                  i;
1350         int                  rc;
1351         ENTRY;
1352
1353         rc = lmv_check_connect(obd);
1354         if (rc)
1355                 RETURN(rc);
1356
1357         CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1358
1359         /*
1360          * With CMD every object can have two locks in different namespaces:
1361          * lookup lock in space of mds storing direntry and update/open lock in
1362          * space of mds storing inode.
1363          */
1364         for (i = 0; i < lmv->desc.ld_tgt_count; i++)
1365                 md_change_cbdata(lmv->tgts[i].ltd_exp, fid, it, data);
1366
1367         RETURN(0);
1368 }
1369
1370 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1371                      struct md_open_data *mod, struct ptlrpc_request **request)
1372 {
1373         struct obd_device     *obd = exp->exp_obd;
1374         struct lmv_obd        *lmv = &obd->u.lmv;
1375         struct lmv_tgt_desc   *tgt;
1376         int                    rc;
1377         ENTRY;
1378
1379         rc = lmv_check_connect(obd);
1380         if (rc)
1381                 RETURN(rc);
1382
1383         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1384         if (IS_ERR(tgt))
1385                 RETURN(PTR_ERR(tgt));
1386
1387         CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1388         rc = md_close(tgt->ltd_exp, op_data, mod, request);
1389         RETURN(rc);
1390 }
1391
1392 /**
1393  * Called in the case MDS returns -ERESTART on create on open, what means that
1394  * directory is split and its LMV presentation object has to be updated.
1395  */
1396 int lmv_handle_split(struct obd_export *exp, const struct lu_fid *fid)
1397 {
1398         struct obd_device       *obd = exp->exp_obd;
1399         struct lmv_obd          *lmv = &obd->u.lmv;
1400         struct ptlrpc_request   *req = NULL;
1401         struct lmv_tgt_desc     *tgt;
1402         struct lmv_object       *obj;
1403         struct lustre_md         md;
1404         struct md_op_data       *op_data;
1405         int                      mealen;
1406         int                      rc;
1407         __u64                    valid;
1408         ENTRY;
1409
1410         md.mea = NULL;
1411         mealen = lmv_get_easize(lmv);
1412
1413         valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA | OBD_MD_MEA;
1414
1415         tgt = lmv_find_target(lmv, fid);
1416         if (IS_ERR(tgt))
1417                 RETURN(PTR_ERR(tgt));
1418
1419         /*
1420          * Time to update mea of parent fid.
1421          */
1422
1423         OBD_ALLOC_PTR(op_data);
1424         if (op_data == NULL)
1425                 RETURN(-ENOMEM);
1426
1427         op_data->op_fid1 = *fid;
1428         op_data->op_mode = mealen;
1429         op_data->op_valid = valid;
1430
1431         rc = md_getattr(tgt->ltd_exp, op_data, &req);
1432         OBD_FREE_PTR(op_data);
1433         if (rc) {
1434                 CERROR("md_getattr() failed, error %d\n", rc);
1435                 GOTO(cleanup, rc);
1436         }
1437
1438         rc = md_get_lustre_md(tgt->ltd_exp, req, NULL, exp, &md);
1439         if (rc) {
1440                 CERROR("md_get_lustre_md() failed, error %d\n", rc);
1441                 GOTO(cleanup, rc);
1442         }
1443
1444         if (md.mea == NULL)
1445                 GOTO(cleanup, rc = -ENODATA);
1446
1447         obj = lmv_object_create(exp, fid, md.mea);
1448         if (IS_ERR(obj))
1449                 rc = PTR_ERR(obj);
1450         else
1451                 lmv_object_put(obj);
1452
1453         obd_free_memmd(exp, (void *)&md.mea);
1454         EXIT;
1455 cleanup:
1456         if (req)
1457                 ptlrpc_req_finished(req);
1458         return rc;
1459 }
1460
1461 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1462                const void *data, int datalen, int mode, __u32 uid,
1463                __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1464                struct ptlrpc_request **request)
1465 {
1466         struct obd_device       *obd = exp->exp_obd;
1467         struct lmv_obd          *lmv = &obd->u.lmv;
1468         struct lmv_tgt_desc     *tgt;
1469         struct lmv_object       *obj;
1470         int                      rc;
1471         int                      loop = 0;
1472         int                      sidx;
1473         ENTRY;
1474
1475         rc = lmv_check_connect(obd);
1476         if (rc)
1477                 RETURN(rc);
1478
1479         if (!lmv->desc.ld_active_tgt_count)
1480                 RETURN(-EIO);
1481 repeat:
1482         ++loop;
1483         LASSERT(loop <= 2);
1484
1485         obj = lmv_object_find(obd, &op_data->op_fid1);
1486         if (obj) {
1487                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1488                                        op_data->op_name, op_data->op_namelen);
1489                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1490                 op_data->op_bias &= ~MDS_CHECK_SPLIT;
1491                 op_data->op_mds = obj->lo_stripes[sidx].ls_mds;
1492                 tgt = lmv_get_target(lmv, op_data->op_mds);
1493                 lmv_object_put(obj);
1494         } else {
1495                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1496                 op_data->op_bias |= MDS_CHECK_SPLIT;
1497                 op_data->op_mds = tgt->ltd_idx;
1498         }
1499
1500         if (IS_ERR(tgt))
1501                 RETURN(PTR_ERR(tgt));
1502
1503         rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
1504         if (rc == -ERESTART)
1505                 goto repeat;
1506         else if (rc)
1507                 RETURN(rc);
1508
1509         CDEBUG(D_INODE, "CREATE '%*s' on "DFID" -> mds #%x\n",
1510                op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1511                op_data->op_mds);
1512
1513         op_data->op_flags |= MF_MDC_CANCEL_FID1;
1514         rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1515                        cap_effective, rdev, request);
1516         if (rc == 0) {
1517                 if (*request == NULL)
1518                         RETURN(rc);
1519                 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1520         } else if (rc == -ERESTART) {
1521                 LASSERT(*request != NULL);
1522                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1523                           "Got -ERESTART during create!\n");
1524                 ptlrpc_req_finished(*request);
1525                 *request = NULL;
1526
1527                 /*
1528                  * Directory got split. Time to update local object and repeat
1529                  * the request with proper MDS.
1530                  */
1531                 rc = lmv_handle_split(exp, &op_data->op_fid1);
1532                 if (rc == 0) {
1533                         rc = lmv_allocate_slaves(obd, &op_data->op_fid1,
1534                                                  op_data, &op_data->op_fid2);
1535                         if (rc)
1536                                 RETURN(rc);
1537                         goto repeat;
1538                 }
1539         }
1540         RETURN(rc);
1541 }
1542
1543 static int lmv_done_writing(struct obd_export *exp,
1544                             struct md_op_data *op_data,
1545                             struct md_open_data *mod)
1546 {
1547         struct obd_device     *obd = exp->exp_obd;
1548         struct lmv_obd        *lmv = &obd->u.lmv;
1549         struct lmv_tgt_desc   *tgt;
1550         int                    rc;
1551         ENTRY;
1552
1553         rc = lmv_check_connect(obd);
1554         if (rc)
1555                 RETURN(rc);
1556
1557         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1558         if (IS_ERR(tgt))
1559                 RETURN(PTR_ERR(tgt));
1560
1561         rc = md_done_writing(tgt->ltd_exp, op_data, mod);
1562         RETURN(rc);
1563 }
1564
1565 static int
1566 lmv_enqueue_slaves(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1567                    struct lookup_intent *it, struct md_op_data *op_data,
1568                    struct lustre_handle *lockh, void *lmm, int lmmsize)
1569 {
1570         struct obd_device     *obd = exp->exp_obd;
1571         struct lmv_obd        *lmv = &obd->u.lmv;
1572         struct lmv_stripe_md  *mea = op_data->op_mea1;
1573         struct md_op_data     *op_data2;
1574         struct lmv_tgt_desc   *tgt;
1575         int                    i;
1576         int                    rc = 0;
1577         ENTRY;
1578
1579         OBD_ALLOC_PTR(op_data2);
1580         if (op_data2 == NULL)
1581                 RETURN(-ENOMEM);
1582
1583         LASSERT(mea != NULL);
1584         for (i = 0; i < mea->mea_count; i++) {
1585                 memset(op_data2, 0, sizeof(*op_data2));
1586                 op_data2->op_fid1 = mea->mea_ids[i];
1587                 op_data2->op_bias = 0;
1588
1589                 tgt = lmv_find_target(lmv, &op_data2->op_fid1);
1590                 if (IS_ERR(tgt))
1591                         GOTO(cleanup, rc = PTR_ERR(tgt));
1592
1593                 if (tgt->ltd_exp == NULL)
1594                         continue;
1595
1596                 rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data2,
1597                                 lockh + i, lmm, lmmsize, NULL, 0);
1598
1599                 CDEBUG(D_INODE, "Take lock on slave "DFID" -> %d/%d\n",
1600                        PFID(&mea->mea_ids[i]), rc, it->d.lustre.it_status);
1601
1602                 if (rc)
1603                         GOTO(cleanup, rc);
1604
1605                 if (it->d.lustre.it_data) {
1606                         struct ptlrpc_request *req;
1607                         req = (struct ptlrpc_request *)it->d.lustre.it_data;
1608                         ptlrpc_req_finished(req);
1609                 }
1610
1611                 if (it->d.lustre.it_status)
1612                         GOTO(cleanup, rc = it->d.lustre.it_status);
1613         }
1614
1615         EXIT;
1616 cleanup:
1617         OBD_FREE_PTR(op_data2);
1618
1619         if (rc != 0) {
1620                 /*
1621                  * Drop all taken locks.
1622                  */
1623                 while (--i >= 0) {
1624                         if (lockh[i].cookie)
1625                                 ldlm_lock_decref(lockh + i, einfo->ei_mode);
1626                         lockh[i].cookie = 0;
1627                 }
1628         }
1629         return rc;
1630 }
1631
1632 static int
1633 lmv_enqueue_remote(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1634                    struct lookup_intent *it, struct md_op_data *op_data,
1635                    struct lustre_handle *lockh, void *lmm, int lmmsize,
1636                    int extra_lock_flags)
1637 {
1638         struct ptlrpc_request      *req = it->d.lustre.it_data;
1639         struct obd_device          *obd = exp->exp_obd;
1640         struct lmv_obd             *lmv = &obd->u.lmv;
1641         struct lustre_handle        plock;
1642         struct lmv_tgt_desc        *tgt;
1643         struct md_op_data          *rdata;
1644         struct lu_fid               fid1;
1645         struct mdt_body            *body;
1646         int                         rc = 0;
1647         int                         pmode;
1648         ENTRY;
1649
1650         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1651         LASSERT(body != NULL);
1652
1653         if (!(body->valid & OBD_MD_MDS))
1654                 RETURN(0);
1655
1656         CDEBUG(D_INODE, "REMOTE_ENQUEUE '%s' on "DFID" -> "DFID"\n",
1657                LL_IT2STR(it), PFID(&op_data->op_fid1), PFID(&body->fid1));
1658
1659         /*
1660          * We got LOOKUP lock, but we really need attrs.
1661          */
1662         pmode = it->d.lustre.it_lock_mode;
1663         LASSERT(pmode != 0);
1664         memcpy(&plock, lockh, sizeof(plock));
1665         it->d.lustre.it_lock_mode = 0;
1666         it->d.lustre.it_data = NULL;
1667         fid1 = body->fid1;
1668
1669         it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
1670         ptlrpc_req_finished(req);
1671
1672         tgt = lmv_find_target(lmv, &fid1);
1673         if (IS_ERR(tgt))
1674                 GOTO(out, rc = PTR_ERR(tgt));
1675
1676         OBD_ALLOC_PTR(rdata);
1677         if (rdata == NULL)
1678                 GOTO(out, rc = -ENOMEM);
1679
1680         rdata->op_fid1 = fid1;
1681         rdata->op_bias = MDS_CROSS_REF;
1682
1683         rc = md_enqueue(tgt->ltd_exp, einfo, it, rdata, lockh,
1684                         lmm, lmmsize, NULL, extra_lock_flags);
1685         OBD_FREE_PTR(rdata);
1686         EXIT;
1687 out:
1688         ldlm_lock_decref(&plock, pmode);
1689         return rc;
1690 }
1691
1692 static int
1693 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1694             struct lookup_intent *it, struct md_op_data *op_data,
1695             struct lustre_handle *lockh, void *lmm, int lmmsize,
1696             struct ptlrpc_request **req, int extra_lock_flags)
1697 {
1698         struct obd_device        *obd = exp->exp_obd;
1699         struct lmv_obd           *lmv = &obd->u.lmv;
1700         struct lmv_tgt_desc      *tgt;
1701         struct lmv_object        *obj;
1702         int                       sidx;
1703         int                       rc;
1704         ENTRY;
1705
1706         rc = lmv_check_connect(obd);
1707         if (rc)
1708                 RETURN(rc);
1709
1710         CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
1711                LL_IT2STR(it), PFID(&op_data->op_fid1));
1712
1713         if (op_data->op_mea1 && it && it->it_op == IT_UNLINK) {
1714                 rc = lmv_enqueue_slaves(exp, einfo, it, op_data,
1715                                         lockh, lmm, lmmsize);
1716                 RETURN(rc);
1717         }
1718
1719         obj = lmv_object_find(obd, &op_data->op_fid1);
1720         if (obj && op_data->op_namelen) {
1721                 sidx = raw_name2idx(obj->lo_hashtype,
1722                                        obj->lo_objcount,
1723                                        (char *)op_data->op_name,
1724                                        op_data->op_namelen);
1725                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1726                 tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
1727         } else {
1728                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1729         }
1730         if (obj)
1731                 lmv_object_put(obj);
1732
1733         if (IS_ERR(tgt))
1734                 RETURN(PTR_ERR(tgt));
1735
1736         CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%d\n",
1737                LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
1738
1739         rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data, lockh,
1740                         lmm, lmmsize, req, extra_lock_flags);
1741
1742         if (rc == 0 && it && it->it_op == IT_OPEN) {
1743                 rc = lmv_enqueue_remote(exp, einfo, it, op_data, lockh,
1744                                         lmm, lmmsize, extra_lock_flags);
1745         }
1746         RETURN(rc);
1747 }
1748
1749 static int
1750 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1751                  struct ptlrpc_request **request)
1752 {
1753         struct ptlrpc_request   *req = NULL;
1754         struct obd_device       *obd = exp->exp_obd;
1755         struct lmv_obd          *lmv = &obd->u.lmv;
1756         struct lu_fid            rid = op_data->op_fid1;
1757         struct lmv_tgt_desc     *tgt;
1758         struct mdt_body         *body;
1759         struct lmv_object       *obj;
1760         obd_valid                valid = op_data->op_valid;
1761         int                      rc;
1762         int                      loop = 0;
1763         int                      sidx;
1764         ENTRY;
1765
1766         rc = lmv_check_connect(obd);
1767         if (rc)
1768                 RETURN(rc);
1769
1770 repeat:
1771         ++loop;
1772         LASSERT(loop <= 2);
1773         obj = lmv_object_find(obd, &rid);
1774         if (obj) {
1775                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1776                                     op_data->op_name, op_data->op_namelen);
1777                 rid = obj->lo_stripes[sidx].ls_fid;
1778                 tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
1779                 op_data->op_mds = obj->lo_stripes[sidx].ls_mds;
1780                 valid &= ~OBD_MD_FLCKSPLIT;
1781                 lmv_object_put(obj);
1782         } else {
1783                 tgt = lmv_find_target(lmv, &rid);
1784                 valid |= OBD_MD_FLCKSPLIT;
1785                 op_data->op_mds = tgt->ltd_idx;
1786         }
1787         if (IS_ERR(tgt))
1788                 RETURN(PTR_ERR(tgt));
1789
1790         CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" - "DFID" -> mds #%d\n",
1791                op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1792                PFID(&rid), tgt->ltd_idx);
1793
1794         op_data->op_valid = valid;
1795         op_data->op_fid1 = rid;
1796         rc = md_getattr_name(tgt->ltd_exp, op_data, request);
1797         if (rc == 0) {
1798                 body = req_capsule_server_get(&(*request)->rq_pill,
1799                                               &RMF_MDT_BODY);
1800                 LASSERT(body != NULL);
1801
1802                 if (body->valid & OBD_MD_MDS) {
1803                         rid = body->fid1;
1804                         CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1805                                PFID(&rid));
1806
1807                         tgt = lmv_find_target(lmv, &rid);
1808                         if (IS_ERR(tgt)) {
1809                                 ptlrpc_req_finished(*request);
1810                                 RETURN(PTR_ERR(tgt));
1811                         }
1812
1813                         op_data->op_fid1 = rid;
1814                         op_data->op_valid |= OBD_MD_FLCROSSREF;
1815                         op_data->op_namelen = 0;
1816                         op_data->op_name = NULL;
1817                         rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
1818                         ptlrpc_req_finished(*request);
1819                         *request = req;
1820                 }
1821         } else if (rc == -ERESTART) {
1822                 LASSERT(*request != NULL);
1823                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1824                           "Got -ERESTART during getattr!\n");
1825                 ptlrpc_req_finished(*request);
1826                 *request = NULL;
1827
1828                 /*
1829                  * Directory got split. Time to update local object and repeat
1830                  * the request with proper MDS.
1831                  */
1832                 rc = lmv_handle_split(exp, &rid);
1833                 if (rc == 0)
1834                         goto repeat;
1835         }
1836         RETURN(rc);
1837 }
1838
1839 #define md_op_data_fid(op_data, fl)                     \
1840         (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1841          fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1842          fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1843          fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1844          NULL)
1845
1846 static int lmv_early_cancel_slaves(struct obd_export *exp,
1847                                    struct md_op_data *op_data, int op_tgt,
1848                                    ldlm_mode_t mode, int bits, int flag)
1849 {
1850         struct obd_device      *obd = exp->exp_obd;
1851         struct lmv_obd         *lmv = &obd->u.lmv;
1852         ldlm_policy_data_t      policy = {{0}};
1853         struct lu_fid          *op_fid;
1854         struct lu_fid          *st_fid;
1855         struct lmv_tgt_desc    *tgt;
1856         struct lmv_object      *obj;
1857         int                     rc = 0;
1858         int                     i;
1859         ENTRY;
1860
1861         op_fid = md_op_data_fid(op_data, flag);
1862         if (!fid_is_sane(op_fid))
1863                 RETURN(0);
1864
1865         obj = lmv_object_find(obd, op_fid);
1866         if (obj == NULL)
1867                 RETURN(-EALREADY);
1868
1869         policy.l_inodebits.bits = bits;
1870         for (i = 0; i < obj->lo_objcount; i++) {
1871                 tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
1872                 st_fid = &obj->lo_stripes[i].ls_fid;
1873                 if (op_tgt != tgt->ltd_idx) {
1874                         CDEBUG(D_INODE, "EARLY_CANCEL slave "DFID" -> mds #%d\n",
1875                                PFID(st_fid), tgt->ltd_idx);
1876                         rc = md_cancel_unused(tgt->ltd_exp, st_fid, &policy,
1877                                               mode, LDLM_FL_ASYNC, NULL);
1878                         if (rc)
1879                                 GOTO(out_put_obj, rc);
1880                 } else {
1881                         CDEBUG(D_INODE,
1882                                "EARLY_CANCEL skip operation target %d on "DFID"\n",
1883                                op_tgt, PFID(st_fid));
1884                         /*
1885                          * Do not cancel locks for operation target, they will
1886                          * be handled later in underlaying layer when calling
1887                          * function we run on behalf of.
1888                          */
1889                         *op_fid = *st_fid;
1890                         op_data->op_flags |= flag;
1891                 }
1892         }
1893         EXIT;
1894 out_put_obj:
1895         lmv_object_put(obj);
1896         return rc;
1897 }
1898
1899 static int lmv_early_cancel(struct obd_export *exp, struct md_op_data *op_data,
1900                             int op_tgt, ldlm_mode_t mode, int bits, int flag)
1901 {
1902         struct lu_fid          *fid = md_op_data_fid(op_data, flag);
1903         struct obd_device      *obd = exp->exp_obd;
1904         struct lmv_obd         *lmv = &obd->u.lmv;
1905         struct lmv_tgt_desc    *tgt;
1906         ldlm_policy_data_t      policy = {{0}};
1907         struct lmv_object      *obj;
1908         int                     rc = 0;
1909         ENTRY;
1910
1911         if (!fid_is_sane(fid))
1912                 RETURN(0);
1913
1914         obj = lmv_object_find(obd, fid);
1915         if (obj) {
1916                 rc = lmv_early_cancel_slaves(exp, op_data, op_tgt, mode,
1917                                              bits, flag);
1918                 lmv_object_put(obj);
1919         } else {
1920                 tgt = lmv_find_target(lmv, fid);
1921                 if (IS_ERR(tgt))
1922                         RETURN(PTR_ERR(tgt));
1923
1924                 if (tgt->ltd_idx != op_tgt) {
1925                         CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1926                         policy.l_inodebits.bits = bits;
1927                         rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1928                                               mode, LDLM_FL_ASYNC, NULL);
1929                 } else {
1930                         CDEBUG(D_INODE,
1931                                "EARLY_CANCEL skip operation target %d on "DFID"\n",
1932                                op_tgt, PFID(fid));
1933                         op_data->op_flags |= flag;
1934                         rc = 0;
1935                 }
1936
1937         }
1938         RETURN(rc);
1939 }
1940
1941 /*
1942  * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1943  * op_data->op_fid2
1944  */
1945 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1946                     struct ptlrpc_request **request)
1947 {
1948         struct obd_device       *obd = exp->exp_obd;
1949         struct lmv_obd          *lmv = &obd->u.lmv;
1950         struct lmv_tgt_desc     *tgt;
1951         struct lmv_object       *obj;
1952         int                      rc;
1953         int                      loop = 0;
1954         mdsno_t                  mds;
1955         int                      sidx;
1956         ENTRY;
1957
1958         rc = lmv_check_connect(obd);
1959         if (rc)
1960                 RETURN(rc);
1961
1962 repeat:
1963         ++loop;
1964         LASSERT(loop <= 2);
1965         LASSERT(op_data->op_namelen != 0);
1966
1967         CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
1968                PFID(&op_data->op_fid2), op_data->op_namelen,
1969                op_data->op_name, PFID(&op_data->op_fid1));
1970
1971         obj = lmv_object_find(obd, &op_data->op_fid2);
1972         if (obj) {
1973                 sidx = raw_name2idx(obj->lo_hashtype,
1974                                     obj->lo_objcount,
1975                                     op_data->op_name,
1976                                     op_data->op_namelen);
1977                 op_data->op_fid2 = obj->lo_stripes[sidx].ls_fid;
1978                 mds = obj->lo_stripes[sidx].ls_mds;
1979                 lmv_object_put(obj);
1980         } else {
1981                 rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds);
1982                 if (rc)
1983                         RETURN(rc);
1984         }
1985
1986         CDEBUG(D_INODE, "Forward to mds #%x ("DFID")\n",
1987                mds, PFID(&op_data->op_fid1));
1988
1989         op_data->op_fsuid = cfs_curproc_fsuid();
1990         op_data->op_fsgid = cfs_curproc_fsgid();
1991         op_data->op_cap = cfs_curproc_cap_pack();
1992         tgt = lmv_get_target(lmv, mds);
1993
1994         /*
1995          * Cancel UPDATE lock on child (fid1).
1996          */
1997         op_data->op_flags |= MF_MDC_CANCEL_FID2;
1998         rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
1999                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2000         if (rc == 0)
2001                 rc = md_link(tgt->ltd_exp, op_data, request);
2002         if (rc == -ERESTART) {
2003                 LASSERT(*request != NULL);
2004                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2005                           "Got -ERESTART during link!\n");
2006                 ptlrpc_req_finished(*request);
2007                 *request = NULL;
2008
2009                 /*
2010                  * Directory got split. Time to update local object and repeat
2011                  * the request with proper MDS.
2012                  */
2013                 rc = lmv_handle_split(exp, &op_data->op_fid2);
2014                 if (rc == 0)
2015                         goto repeat;
2016         }
2017
2018         RETURN(rc);
2019 }
2020
2021 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
2022                       const char *old, int oldlen, const char *new, int newlen,
2023                       struct ptlrpc_request **request)
2024 {
2025         struct obd_device       *obd = exp->exp_obd;
2026         struct lmv_obd          *lmv = &obd->u.lmv;
2027         struct lmv_tgt_desc     *src_tgt;
2028         struct lmv_tgt_desc     *tgt_tgt;
2029         int                      rc;
2030         int                      sidx;
2031         int                      loop = 0;
2032         struct lmv_object       *obj;
2033         mdsno_t                  mds1;
2034         mdsno_t                  mds2;
2035         ENTRY;
2036
2037         LASSERT(oldlen != 0);
2038
2039         CDEBUG(D_INODE, "RENAME %*s in "DFID" to %*s in "DFID"\n",
2040                oldlen, old, PFID(&op_data->op_fid1),
2041                newlen, new, PFID(&op_data->op_fid2));
2042
2043         rc = lmv_check_connect(obd);
2044         if (rc)
2045                 RETURN(rc);
2046
2047 repeat:
2048         ++loop;
2049         LASSERT(loop <= 2);
2050         obj = lmv_object_find(obd, &op_data->op_fid1);
2051         if (obj) {
2052                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
2053                                     (char *)old, oldlen);
2054                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2055                 mds1 = obj->lo_stripes[sidx].ls_mds;
2056                 CDEBUG(D_INODE, "Parent obj "DFID"\n", PFID(&op_data->op_fid1));
2057                 lmv_object_put(obj);
2058         } else {
2059                 rc = lmv_fld_lookup(lmv, &op_data->op_fid1, &mds1);
2060                 if (rc)
2061                         RETURN(rc);
2062         }
2063
2064         obj = lmv_object_find(obd, &op_data->op_fid2);
2065         if (obj) {
2066                 /*
2067                  * Directory is already split, so we have to forward request to
2068                  * the right MDS.
2069                  */
2070                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
2071                                        (char *)new, newlen);
2072
2073                 mds2 = obj->lo_stripes[sidx].ls_mds;
2074                 op_data->op_fid2 = obj->lo_stripes[sidx].ls_fid;
2075                 CDEBUG(D_INODE, "Parent obj "DFID"\n", PFID(&op_data->op_fid2));
2076                 lmv_object_put(obj);
2077         } else {
2078                 rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds2);
2079                 if (rc)
2080                         RETURN(rc);
2081         }
2082
2083         op_data->op_fsuid = cfs_curproc_fsuid();
2084         op_data->op_fsgid = cfs_curproc_fsgid();
2085         op_data->op_cap = cfs_curproc_cap_pack();
2086
2087         src_tgt = lmv_get_target(lmv, mds1);
2088         tgt_tgt = lmv_get_target(lmv, mds2);
2089
2090         /*
2091          * LOOKUP lock on src child (fid3) should also be cancelled for
2092          * src_tgt in mdc_rename.
2093          */
2094         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2095
2096         /*
2097          * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
2098          * own target.
2099          */
2100         rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2101                               LCK_EX, MDS_INODELOCK_UPDATE,
2102                               MF_MDC_CANCEL_FID2);
2103
2104         /*
2105          * Cancel LOOKUP locks on tgt child (fid4) for parent tgt_tgt.
2106          */
2107         if (rc == 0) {
2108                 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2109                                       LCK_EX, MDS_INODELOCK_LOOKUP,
2110                                       MF_MDC_CANCEL_FID4);
2111         }
2112
2113         /*
2114          * Cancel all the locks on tgt child (fid4).
2115          */
2116         if (rc == 0)
2117                 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2118                                       LCK_EX, MDS_INODELOCK_FULL,
2119                                       MF_MDC_CANCEL_FID4);
2120
2121         if (rc == 0)
2122                 rc = md_rename(src_tgt->ltd_exp, op_data, old, oldlen,
2123                                new, newlen, request);
2124
2125         if (rc == -ERESTART) {
2126                 LASSERT(*request != NULL);
2127                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2128                           "Got -ERESTART during rename!\n");
2129                 ptlrpc_req_finished(*request);
2130                 *request = NULL;
2131
2132                 /*
2133                  * Directory got split. Time to update local object and repeat
2134                  * the request with proper MDS.
2135                  */
2136                 rc = lmv_handle_split(exp, &op_data->op_fid1);
2137                 if (rc == 0)
2138                         goto repeat;
2139         }
2140         RETURN(rc);
2141 }
2142
2143 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2144                        void *ea, int ealen, void *ea2, int ea2len,
2145                        struct ptlrpc_request **request,
2146                        struct md_open_data **mod)
2147 {
2148         struct obd_device       *obd = exp->exp_obd;
2149         struct lmv_obd          *lmv = &obd->u.lmv;
2150         struct ptlrpc_request   *req;
2151         struct lmv_tgt_desc     *tgt;
2152         struct lmv_object       *obj;
2153         int                      rc = 0;
2154         int                      i;
2155         ENTRY;
2156
2157         rc = lmv_check_connect(obd);
2158         if (rc)
2159                 RETURN(rc);
2160
2161         obj = lmv_object_find(obd, &op_data->op_fid1);
2162
2163         CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x%s\n",
2164                PFID(&op_data->op_fid1), op_data->op_attr.ia_valid,
2165                obj ? ", split" : "");
2166
2167         op_data->op_flags |= MF_MDC_CANCEL_FID1;
2168         if (obj) {
2169                 for (i = 0; i < obj->lo_objcount; i++) {
2170                         op_data->op_fid1 = obj->lo_stripes[i].ls_fid;
2171
2172                         tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
2173                         if (IS_ERR(tgt)) {
2174                                 rc = PTR_ERR(tgt);
2175                                 break;
2176                         }
2177
2178                         rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen,
2179                                         ea2, ea2len, &req, mod);
2180
2181                         if (lu_fid_eq(&obj->lo_fid, &obj->lo_stripes[i].ls_fid)) {
2182                                 /*
2183                                  * This is master object and this request should
2184                                  * be returned back to llite.
2185                                  */
2186                                 *request = req;
2187                         } else {
2188                                 ptlrpc_req_finished(req);
2189                         }
2190
2191                         if (rc)
2192                                 break;
2193                 }
2194                 lmv_object_put(obj);
2195         } else {
2196                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2197                 if (IS_ERR(tgt))
2198                         RETURN(PTR_ERR(tgt));
2199
2200                 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, ea2,
2201                                 ea2len, request, mod);
2202         }
2203         RETURN(rc);
2204 }
2205
2206 static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
2207                     struct obd_capa *oc, struct ptlrpc_request **request)
2208 {
2209         struct obd_device         *obd = exp->exp_obd;
2210         struct lmv_obd            *lmv = &obd->u.lmv;
2211         struct lmv_tgt_desc       *tgt;
2212         int                        rc;
2213         ENTRY;
2214
2215         rc = lmv_check_connect(obd);
2216         if (rc)
2217                 RETURN(rc);
2218
2219         tgt = lmv_find_target(lmv, fid);
2220         if (IS_ERR(tgt))
2221                 RETURN(PTR_ERR(tgt));
2222
2223         rc = md_sync(tgt->ltd_exp, fid, oc, request);
2224         RETURN(rc);
2225 }
2226
2227 /**
2228  * Main purpose of LMV blocking ast is to remove split directory LMV
2229  * presentation object (struct lmv_object) attached to the lock being revoked.
2230  */
2231 int lmv_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
2232                      void *data, int flag)
2233 {
2234         struct lustre_handle    lockh;
2235         struct lmv_object      *obj;
2236         int                     rc;
2237         ENTRY;
2238
2239         switch (flag) {
2240         case LDLM_CB_BLOCKING:
2241                 ldlm_lock2handle(lock, &lockh);
2242                 rc = ldlm_cli_cancel(&lockh);
2243                 if (rc < 0) {
2244                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
2245                         RETURN(rc);
2246                 }
2247                 break;
2248         case LDLM_CB_CANCELING:
2249                 /*
2250                  * Time to drop cached attrs for split directory object
2251                  */
2252                 obj = lock->l_ast_data;
2253                 if (obj) {
2254                         CDEBUG(D_INODE, "Cancel %s on "LPU64"/"LPU64
2255                                ", master "DFID"\n",
2256                                lock->l_resource->lr_name.name[3] == 1 ?
2257                                "LOOKUP" : "UPDATE",
2258                                lock->l_resource->lr_name.name[0],
2259                                lock->l_resource->lr_name.name[1],
2260                                PFID(&obj->lo_fid));
2261                         lmv_object_put(obj);
2262                 }
2263                 break;
2264         default:
2265                 LBUG();
2266         }
2267         RETURN(0);
2268 }
2269
2270 static void lmv_hash_adjust(__u64 *hash, __u64 hash_adj)
2271 {
2272         __u64         val;
2273
2274         val = le64_to_cpu(*hash);
2275         if (val < hash_adj)
2276                 val += MAX_HASH_SIZE;
2277         if (val != DIR_END_OFF)
2278                 *hash = cpu_to_le64(val - hash_adj);
2279 }
2280
2281 static __u32 lmv_node_rank(struct obd_export *exp, const struct lu_fid *fid)
2282 {
2283         __u64              id;
2284         struct obd_import *imp;
2285
2286         /*
2287          * XXX: to get nid we assume that underlying obd device is mdc.
2288          */
2289         imp  = class_exp2cliimp(exp);
2290         id   = imp->imp_connection->c_self + fid_flatten(fid);
2291
2292         CDEBUG(D_INODE, "Readpage node rank: "LPX64" "DFID" "LPX64" "LPX64"\n",
2293                imp->imp_connection->c_self, PFID(fid), id, id ^ (id >> 32));
2294
2295         return id ^ (id >> 32);
2296 }
2297
2298 static int lmv_readpage(struct obd_export *exp, const struct lu_fid *fid,
2299                         struct obd_capa *oc, __u64 offset64, struct page *page,
2300                         struct ptlrpc_request **request)
2301 {
2302         struct obd_device       *obd = exp->exp_obd;
2303         struct lmv_obd          *lmv = &obd->u.lmv;
2304         struct lu_fid            rid = *fid;
2305         struct lmv_object       *obj;
2306         __u64                    offset;
2307         __u64                    hash_adj = 0;
2308         __u32                    rank = 0;
2309         __u64                    seg_size = 0;
2310         __u64                    tgt_tmp = 0;
2311         int                      tgt_idx = 0;
2312         int                      tgt0_idx = 0;
2313         int                      rc;
2314         int                      nr = 0;
2315         struct lmv_stripe       *los;
2316         struct lmv_tgt_desc     *tgt;
2317         struct lu_dirpage       *dp;
2318         struct lu_dirent        *ent;
2319         ENTRY;
2320
2321         offset = offset64;
2322
2323         rc = lmv_check_connect(obd);
2324         if (rc)
2325                 RETURN(rc);
2326
2327         CDEBUG(D_INODE, "READPAGE at "LPX64" from "DFID"\n", offset, PFID(&rid));
2328
2329         /*
2330          * This case handle directory lookup in clustered metadata case (i.e.
2331          * split directory is located on multiple md servers.)
2332          * each server keeps directory entries for certain range of hashes.
2333          * E.g. we have N server and suppose hash range is 0 to MAX_HASH.
2334          * first server will keep records with hashes [ 0 ... MAX_HASH / N  - 1],
2335          * second one with hashes [MAX_HASH / N ... 2 * MAX_HASH / N] and
2336          * so on....
2337          *      readdir can simply start reading entries from 0 - N server in
2338          * order but that will not scale well as all client will request dir in
2339          * to server in same order.
2340          * Following algorithm does optimization:
2341          * Instead of doing readdir in 1, 2, ...., N order, client with a
2342          * rank R does readdir in R, R + 1, ..., N, 1, ... R - 1 order.
2343          * (every client has rank R)
2344          *      But ll_readdir() expect offset range [0 to MAX_HASH/N) but
2345          * since client ask dir from MDS{R} client has pages with offsets
2346          * [R*MAX_HASH/N ... (R + 1)*MAX_HASH/N] there for we do hash_adj
2347          * on hash  values that we get.
2348          */
2349         obj = lmv_object_find_lock(obd, fid);
2350         if (obj) {
2351                 nr       = obj->lo_objcount;
2352                 LASSERT(nr > 0);
2353                 seg_size = MAX_HASH_SIZE;
2354                 do_div(seg_size, nr);
2355                 los      = obj->lo_stripes;
2356                 tgt      = lmv_get_target(lmv, los[0].ls_mds);
2357                 rank     = lmv_node_rank(tgt->ltd_exp, fid) % nr;
2358                 tgt_tmp  = offset;
2359                 do_div(tgt_tmp, seg_size);
2360                 tgt0_idx = do_div(tgt_tmp,  nr);
2361                 tgt_idx  = (tgt0_idx + rank) % nr;
2362
2363                 if (tgt_idx < tgt0_idx)
2364                         /*
2365                          * Wrap around.
2366                          *
2367                          * Last segment has unusual length due to division
2368                          * rounding.
2369                          */
2370                         hash_adj = MAX_HASH_SIZE - seg_size * nr;
2371                 else
2372                         hash_adj = 0;
2373
2374                 hash_adj += rank * seg_size;
2375
2376                 CDEBUG(D_INODE, "Readpage hash adjustment: %x "LPX64" "
2377                        LPX64"/%x -> "LPX64"/%x\n", rank, hash_adj,
2378                        offset, tgt0_idx, offset + hash_adj, tgt_idx);
2379
2380                 offset = (offset + hash_adj) & MAX_HASH_SIZE;
2381                 rid = obj->lo_stripes[tgt_idx].ls_fid;
2382                 tgt = lmv_get_target(lmv, los[tgt_idx].ls_mds);
2383
2384                 CDEBUG(D_INODE, "Forward to "DFID" with offset %lu i %d\n",
2385                        PFID(&rid), (unsigned long)offset, tgt_idx);
2386         } else
2387                 tgt = lmv_find_target(lmv, &rid);
2388
2389         if (IS_ERR(tgt))
2390                 GOTO(cleanup, rc = PTR_ERR(tgt));
2391
2392         rc = md_readpage(tgt->ltd_exp, &rid, oc, offset, page, request);
2393         if (rc)
2394                 GOTO(cleanup, rc);
2395         if (obj) {
2396                 dp = cfs_kmap(page);
2397
2398                 lmv_hash_adjust(&dp->ldp_hash_start, hash_adj);
2399                 lmv_hash_adjust(&dp->ldp_hash_end,   hash_adj);
2400                 LASSERT(le64_to_cpu(dp->ldp_hash_start) <= offset64);
2401
2402                 for (ent = lu_dirent_start(dp); ent != NULL;
2403                      ent = lu_dirent_next(ent))
2404                         lmv_hash_adjust(&ent->lde_hash, hash_adj);
2405
2406                 if (tgt0_idx != nr - 1) {
2407                         __u64 end;
2408
2409                         end = le64_to_cpu(dp->ldp_hash_end);
2410                         if (end == DIR_END_OFF) {
2411                                 dp->ldp_hash_end = cpu_to_le32(seg_size *
2412                                                                (tgt0_idx + 1));
2413                                 CDEBUG(D_INODE,
2414                                        ""DFID" reset end "LPX64" tgt %d\n",
2415                                        PFID(&rid),
2416                                        le64_to_cpu(dp->ldp_hash_end), tgt_idx);
2417                         }
2418                 }
2419                 cfs_kunmap(page);
2420         }
2421         EXIT;
2422 cleanup:
2423         if (obj)
2424                 lmv_object_put_unlock(obj);
2425         return rc;
2426 }
2427
2428 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2429                       struct ptlrpc_request **request)
2430 {
2431         struct obd_device       *obd = exp->exp_obd;
2432         struct lmv_obd          *lmv = &obd->u.lmv;
2433         struct lmv_tgt_desc     *tgt = NULL;
2434         struct lmv_object       *obj;
2435         int                      rc;
2436         int                      sidx;
2437         int                      loop = 0;
2438         ENTRY;
2439
2440         rc = lmv_check_connect(obd);
2441         if (rc)
2442                 RETURN(rc);
2443
2444 repeat:
2445         ++loop;
2446         LASSERT(loop <= 2);
2447         LASSERT(op_data->op_namelen != 0);
2448
2449         obj = lmv_object_find(obd, &op_data->op_fid1);
2450         if (obj) {
2451                 sidx = raw_name2idx(obj->lo_hashtype,
2452                                     obj->lo_objcount,
2453                                     op_data->op_name,
2454                                     op_data->op_namelen);
2455                 op_data->op_bias &= ~MDS_CHECK_SPLIT;
2456                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2457                 tgt = lmv_get_target(lmv,
2458                                      obj->lo_stripes[sidx].ls_mds);
2459                 lmv_object_put(obj);
2460                 CDEBUG(D_INODE, "UNLINK '%*s' in "DFID" -> %u\n",
2461                        op_data->op_namelen, op_data->op_name,
2462                        PFID(&op_data->op_fid1), sidx);
2463         }
2464
2465         if (tgt == NULL) {
2466                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2467                 if (IS_ERR(tgt))
2468                         RETURN(PTR_ERR(tgt));
2469                 op_data->op_bias |= MDS_CHECK_SPLIT;
2470         }
2471
2472         op_data->op_fsuid = cfs_curproc_fsuid();
2473         op_data->op_fsgid = cfs_curproc_fsgid();
2474         op_data->op_cap = cfs_curproc_cap_pack();
2475
2476         /*
2477          * If child's fid is given, cancel unused locks for it if it is from
2478          * another export than parent.
2479          *
2480          * LOOKUP lock for child (fid3) should also be cancelled on parent
2481          * tgt_tgt in mdc_unlink().
2482          */
2483         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2484
2485         /*
2486          * Cancel FULL locks on child (fid3).
2487          */
2488         rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2489                               MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2490
2491         if (rc == 0)
2492                 rc = md_unlink(tgt->ltd_exp, op_data, request);
2493
2494         if (rc == -ERESTART) {
2495                 LASSERT(*request != NULL);
2496                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2497                           "Got -ERESTART during unlink!\n");
2498                 ptlrpc_req_finished(*request);
2499                 *request = NULL;
2500
2501                 /*
2502                  * Directory got split. Time to update local object and repeat
2503                  * the request with proper MDS.
2504                  */
2505                 rc = lmv_handle_split(exp, &op_data->op_fid1);
2506                 if (rc == 0)
2507                         goto repeat;
2508         }
2509         RETURN(rc);
2510 }
2511
2512 static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2513 {
2514         int        rc = 0;
2515
2516         switch (stage) {
2517         case OBD_CLEANUP_EARLY:
2518                 /* XXX: here should be calling obd_precleanup() down to
2519                  * stack. */
2520                 break;
2521         case OBD_CLEANUP_EXPORTS:
2522                 rc = obd_llog_finish(obd, 0);
2523                 if (rc != 0)
2524                         CERROR("failed to cleanup llogging subsystems\n");
2525                 break;
2526         default:
2527                 break;
2528         }
2529         RETURN(rc);
2530 }
2531
2532 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
2533                         void *key, __u32 *vallen, void *val,
2534                         struct lov_stripe_md *lsm)
2535 {
2536         struct obd_device       *obd;
2537         struct lmv_obd          *lmv;
2538         int                      rc = 0;
2539         ENTRY;
2540
2541         obd = class_exp2obd(exp);
2542         if (obd == NULL) {
2543                 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2544                        exp->exp_handle.h_cookie);
2545                 RETURN(-EINVAL);
2546         }
2547
2548         lmv = &obd->u.lmv;
2549         if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2550                 struct lmv_tgt_desc *tgts;
2551                 int i;
2552
2553                 rc = lmv_check_connect(obd);
2554                 if (rc)
2555                         RETURN(rc);
2556
2557                 LASSERT(*vallen == sizeof(__u32));
2558                 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count;
2559                      i++, tgts++) {
2560
2561                         /*
2562                          * All tgts should be connected when this gets called.
2563                          */
2564                         if (!tgts || !tgts->ltd_exp) {
2565                                 CERROR("target not setup?\n");
2566                                 continue;
2567                         }
2568
2569                         if (!obd_get_info(tgts->ltd_exp, keylen, key,
2570                                           vallen, val, NULL))
2571                                 RETURN(0);
2572                 }
2573                 RETURN(-EINVAL);
2574         } else if (KEY_IS(KEY_MAX_EASIZE) || KEY_IS(KEY_CONN_DATA)) {
2575                 rc = lmv_check_connect(obd);
2576                 if (rc)
2577                         RETURN(rc);
2578
2579                 /*
2580                  * Forwarding this request to first MDS, it should know LOV
2581                  * desc.
2582                  */
2583                 rc = obd_get_info(lmv->tgts[0].ltd_exp, keylen, key,
2584                                   vallen, val, NULL);
2585                 if (!rc && KEY_IS(KEY_CONN_DATA)) {
2586                         exp->exp_connect_flags =
2587                         ((struct obd_connect_data *)val)->ocd_connect_flags;
2588                 }
2589                 RETURN(rc);
2590         }
2591
2592         CDEBUG(D_IOCTL, "Invalid key\n");
2593         RETURN(-EINVAL);
2594 }
2595
2596 int lmv_set_info_async(struct obd_export *exp, obd_count keylen,
2597                        void *key, obd_count vallen, void *val,
2598                        struct ptlrpc_request_set *set)
2599 {
2600         struct lmv_tgt_desc    *tgt;
2601         struct obd_device      *obd;
2602         struct lmv_obd         *lmv;
2603         int rc = 0;
2604         ENTRY;
2605
2606         obd = class_exp2obd(exp);
2607         if (obd == NULL) {
2608                 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2609                        exp->exp_handle.h_cookie);
2610                 RETURN(-EINVAL);
2611         }
2612         lmv = &obd->u.lmv;
2613
2614         if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX) ||
2615             KEY_IS(KEY_INIT_RECOV_BACKUP)) {
2616                 int i, err = 0;
2617
2618                 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2619                         tgt = &lmv->tgts[i];
2620
2621                         if (!tgt->ltd_exp)
2622                                 continue;
2623
2624                         err = obd_set_info_async(tgt->ltd_exp,
2625                                                  keylen, key, vallen, val, set);
2626                         if (err && rc == 0)
2627                                 rc = err;
2628                 }
2629
2630                 RETURN(rc);
2631         }
2632
2633         RETURN(-EINVAL);
2634 }
2635
2636 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
2637                struct lov_stripe_md *lsm)
2638 {
2639         struct obd_device         *obd = class_exp2obd(exp);
2640         struct lmv_obd            *lmv = &obd->u.lmv;
2641         struct lmv_stripe_md      *meap;
2642         struct lmv_stripe_md      *lsmp;
2643         int                        mea_size;
2644         int                        i;
2645         ENTRY;
2646
2647         mea_size = lmv_get_easize(lmv);
2648         if (!lmmp)
2649                 RETURN(mea_size);
2650
2651         if (*lmmp && !lsm) {
2652                 OBD_FREE(*lmmp, mea_size);
2653                 *lmmp = NULL;
2654                 RETURN(0);
2655         }
2656
2657         if (*lmmp == NULL) {
2658                 OBD_ALLOC(*lmmp, mea_size);
2659                 if (*lmmp == NULL)
2660                         RETURN(-ENOMEM);
2661         }
2662
2663         if (!lsm)
2664                 RETURN(mea_size);
2665
2666         lsmp = (struct lmv_stripe_md *)lsm;
2667         meap = (struct lmv_stripe_md *)*lmmp;
2668
2669         if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
2670             lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
2671                 RETURN(-EINVAL);
2672
2673         meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
2674         meap->mea_count = cpu_to_le32(lsmp->mea_count);
2675         meap->mea_master = cpu_to_le32(lsmp->mea_master);
2676
2677         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2678                 meap->mea_ids[i] = meap->mea_ids[i];
2679                 fid_cpu_to_le(&meap->mea_ids[i], &meap->mea_ids[i]);
2680         }
2681
2682         RETURN(mea_size);
2683 }
2684
2685 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
2686                  struct lov_mds_md *lmm, int lmm_size)
2687 {
2688         struct obd_device          *obd = class_exp2obd(exp);
2689         struct lmv_stripe_md      **tmea = (struct lmv_stripe_md **)lsmp;
2690         struct lmv_stripe_md       *mea = (struct lmv_stripe_md *)lmm;
2691         struct lmv_obd             *lmv = &obd->u.lmv;
2692         int                         mea_size;
2693         int                         i;
2694         __u32                       magic;
2695         ENTRY;
2696
2697         mea_size = lmv_get_easize(lmv);
2698         if (lsmp == NULL)
2699                 return mea_size;
2700
2701         if (*lsmp != NULL && lmm == NULL) {
2702                 OBD_FREE(*tmea, mea_size);
2703                 *lsmp = NULL;
2704                 RETURN(0);
2705         }
2706
2707         LASSERT(mea_size == lmm_size);
2708
2709         OBD_ALLOC(*tmea, mea_size);
2710         if (*tmea == NULL)
2711                 RETURN(-ENOMEM);
2712
2713         if (!lmm)
2714                 RETURN(mea_size);
2715
2716         if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
2717             mea->mea_magic == MEA_MAGIC_ALL_CHARS ||
2718             mea->mea_magic == MEA_MAGIC_HASH_SEGMENT)
2719         {
2720                 magic = le32_to_cpu(mea->mea_magic);
2721         } else {
2722                 /*
2723                  * Old mea is not handled here.
2724                  */
2725                 CERROR("Old not supportable EA is found\n");
2726                 LBUG();
2727         }
2728
2729         (*tmea)->mea_magic = magic;
2730         (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
2731         (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
2732
2733         for (i = 0; i < (*tmea)->mea_count; i++) {
2734                 (*tmea)->mea_ids[i] = mea->mea_ids[i];
2735                 fid_le_to_cpu(&(*tmea)->mea_ids[i], &(*tmea)->mea_ids[i]);
2736         }
2737         RETURN(mea_size);
2738 }
2739
2740 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
2741                              ldlm_policy_data_t *policy, ldlm_mode_t mode,
2742                              int flags, void *opaque)
2743 {
2744         struct obd_device       *obd = exp->exp_obd;
2745         struct lmv_obd          *lmv = &obd->u.lmv;
2746         int                      rc = 0;
2747         int                      err;
2748         int                      i;
2749         ENTRY;
2750
2751         LASSERT(fid != NULL);
2752
2753         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2754                 if (!lmv->tgts[i].ltd_exp || !lmv->tgts[i].ltd_active)
2755                         continue;
2756
2757                 err = md_cancel_unused(lmv->tgts[i].ltd_exp, fid,
2758                                        policy, mode, flags, opaque);
2759                 if (!rc)
2760                         rc = err;
2761         }
2762         RETURN(rc);
2763 }
2764
2765 int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
2766                       __u32 *bits)
2767 {
2768         struct obd_device       *obd = exp->exp_obd;
2769         struct lmv_obd          *lmv = &obd->u.lmv;
2770         int                      rc;
2771         ENTRY;
2772
2773         rc =  md_set_lock_data(lmv->tgts[0].ltd_exp, lockh, data, bits);
2774         RETURN(rc);
2775 }
2776
2777 ldlm_mode_t lmv_lock_match(struct obd_export *exp, int flags,
2778                            const struct lu_fid *fid, ldlm_type_t type,
2779                            ldlm_policy_data_t *policy, ldlm_mode_t mode,
2780                            struct lustre_handle *lockh)
2781 {
2782         struct obd_device       *obd = exp->exp_obd;
2783         struct lmv_obd          *lmv = &obd->u.lmv;
2784         ldlm_mode_t              rc;
2785         int                      i;
2786         ENTRY;
2787
2788         CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
2789
2790         /*
2791          * With CMD every object can have two locks in different namespaces:
2792          * lookup lock in space of mds storing direntry and update/open lock in
2793          * space of mds storing inode. Thus we check all targets, not only that
2794          * one fid was created in.
2795          */
2796         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2797                 rc = md_lock_match(lmv->tgts[i].ltd_exp, flags, fid,
2798                                    type, policy, mode, lockh);
2799                 if (rc)
2800                         RETURN(rc);
2801         }
2802
2803         RETURN(0);
2804 }
2805
2806 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
2807                       struct obd_export *dt_exp, struct obd_export *md_exp,
2808                       struct lustre_md *md)
2809 {
2810         struct obd_device       *obd = exp->exp_obd;
2811         struct lmv_obd          *lmv = &obd->u.lmv;
2812         int                      rc;
2813         ENTRY;
2814         rc = md_get_lustre_md(lmv->tgts[0].ltd_exp, req, dt_exp, md_exp, md);
2815         RETURN(rc);
2816 }
2817
2818 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
2819 {
2820         struct obd_device       *obd = exp->exp_obd;
2821         struct lmv_obd          *lmv = &obd->u.lmv;
2822         ENTRY;
2823
2824         if (md->mea)
2825                 obd_free_memmd(exp, (void *)&md->mea);
2826         RETURN(md_free_lustre_md(lmv->tgts[0].ltd_exp, md));
2827 }
2828
2829 int lmv_set_open_replay_data(struct obd_export *exp,
2830                              struct obd_client_handle *och,
2831                              struct ptlrpc_request *open_req)
2832 {
2833         struct obd_device       *obd = exp->exp_obd;
2834         struct lmv_obd          *lmv = &obd->u.lmv;
2835         struct lmv_tgt_desc     *tgt;
2836         ENTRY;
2837
2838         tgt = lmv_find_target(lmv, &och->och_fid);
2839         if (IS_ERR(tgt))
2840                 RETURN(PTR_ERR(tgt));
2841
2842         RETURN(md_set_open_replay_data(tgt->ltd_exp, och, open_req));
2843 }
2844
2845 int lmv_clear_open_replay_data(struct obd_export *exp,
2846                                struct obd_client_handle *och)
2847 {
2848         struct obd_device       *obd = exp->exp_obd;
2849         struct lmv_obd          *lmv = &obd->u.lmv;
2850         struct lmv_tgt_desc     *tgt;
2851         ENTRY;
2852
2853         tgt = lmv_find_target(lmv, &och->och_fid);
2854         if (IS_ERR(tgt))
2855                 RETURN(PTR_ERR(tgt));
2856
2857         RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
2858 }
2859
2860 static int lmv_get_remote_perm(struct obd_export *exp,
2861                                const struct lu_fid *fid,
2862                                struct obd_capa *oc, __u32 suppgid,
2863                                struct ptlrpc_request **request)
2864 {
2865         struct obd_device       *obd = exp->exp_obd;
2866         struct lmv_obd          *lmv = &obd->u.lmv;
2867         struct lmv_tgt_desc     *tgt;
2868         int                      rc;
2869         ENTRY;
2870
2871         rc = lmv_check_connect(obd);
2872         if (rc)
2873                 RETURN(rc);
2874
2875         tgt = lmv_find_target(lmv, fid);
2876         if (IS_ERR(tgt))
2877                 RETURN(PTR_ERR(tgt));
2878
2879         rc = md_get_remote_perm(tgt->ltd_exp, fid, oc, suppgid, request);
2880         RETURN(rc);
2881 }
2882
2883 static int lmv_renew_capa(struct obd_export *exp, struct obd_capa *oc,
2884                           renew_capa_cb_t cb)
2885 {
2886         struct obd_device       *obd = exp->exp_obd;
2887         struct lmv_obd          *lmv = &obd->u.lmv;
2888         struct lmv_tgt_desc     *tgt;
2889         int                      rc;
2890         ENTRY;
2891
2892         rc = lmv_check_connect(obd);
2893         if (rc)
2894                 RETURN(rc);
2895
2896         tgt = lmv_find_target(lmv, &oc->c_capa.lc_fid);
2897         if (IS_ERR(tgt))
2898                 RETURN(PTR_ERR(tgt));
2899
2900         rc = md_renew_capa(tgt->ltd_exp, oc, cb);
2901         RETURN(rc);
2902 }
2903
2904 int lmv_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
2905                     const struct req_msg_field *field, struct obd_capa **oc)
2906 {
2907         struct obd_device *obd = exp->exp_obd;
2908         struct lmv_obd *lmv = &obd->u.lmv;
2909         int rc;
2910
2911         ENTRY;
2912         rc = md_unpack_capa(lmv->tgts[0].ltd_exp, req, field, oc);
2913         RETURN(rc);
2914 }
2915
2916 int lmv_intent_getattr_async(struct obd_export *exp,
2917                              struct md_enqueue_info *minfo,
2918                              struct ldlm_enqueue_info *einfo)
2919 {
2920         struct md_op_data       *op_data = &minfo->mi_data;
2921         struct obd_device       *obd = exp->exp_obd;
2922         struct lmv_obd          *lmv = &obd->u.lmv;
2923         struct lmv_object       *obj;
2924         struct lmv_tgt_desc     *tgt;
2925         int                      rc;
2926         int                      sidx;
2927         ENTRY;
2928
2929         rc = lmv_check_connect(obd);
2930         if (rc)
2931                 RETURN(rc);
2932
2933         if (!fid_is_sane(&op_data->op_fid2)) {
2934                 obj = lmv_object_find(obd, &op_data->op_fid1);
2935                 if (obj && op_data->op_namelen) {
2936                         sidx = raw_name2idx(obj->lo_hashtype,
2937                                             obj->lo_objcount,
2938                                             (char *)op_data->op_name,
2939                                             op_data->op_namelen);
2940                         op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2941                         tgt = lmv_get_target(lmv,
2942                                              obj->lo_stripes[sidx].ls_mds);
2943                         CDEBUG(D_INODE,
2944                                "Choose slave dir ("DFID") -> mds #%d\n",
2945                                PFID(&op_data->op_fid1), tgt->ltd_idx);
2946                 } else {
2947                         tgt = lmv_find_target(lmv, &op_data->op_fid1);
2948                 }
2949                 if (obj)
2950                         lmv_object_put(obj);
2951         } else {
2952                 op_data->op_fid1 = op_data->op_fid2;
2953                 tgt = lmv_find_target(lmv, &op_data->op_fid2);
2954                 op_data->op_bias = MDS_CROSS_REF;
2955                 /*
2956                  * Unfortunately, we have to lie to MDC/MDS to retrieve
2957                  * attributes llite needs.
2958                 */
2959                 if (minfo->mi_it.it_op & IT_LOOKUP)
2960                         minfo->mi_it.it_op = IT_GETATTR;
2961         }
2962
2963         if (IS_ERR(tgt))
2964                 RETURN(PTR_ERR(tgt));
2965
2966         rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
2967         RETURN(rc);
2968 }
2969
2970 int lmv_revalidate_lock(struct obd_export *exp,
2971                         struct lookup_intent *it,
2972                         struct lu_fid *fid)
2973 {
2974         struct obd_device       *obd = exp->exp_obd;
2975         struct lmv_obd          *lmv = &obd->u.lmv;
2976         struct lmv_tgt_desc     *tgt;
2977         int                      rc;
2978         ENTRY;
2979
2980         rc = lmv_check_connect(obd);
2981         if (rc)
2982                 RETURN(rc);
2983
2984         tgt = lmv_find_target(lmv, fid);
2985         if (IS_ERR(tgt))
2986                 RETURN(PTR_ERR(tgt));
2987
2988         rc = md_revalidate_lock(tgt->ltd_exp, it, fid);
2989         RETURN(rc);
2990 }
2991
2992
2993 struct obd_ops lmv_obd_ops = {
2994         .o_owner                = THIS_MODULE,
2995         .o_setup                = lmv_setup,
2996         .o_cleanup              = lmv_cleanup,
2997         .o_precleanup           = lmv_precleanup,
2998         .o_process_config       = lmv_process_config,
2999         .o_connect              = lmv_connect,
3000         .o_disconnect           = lmv_disconnect,
3001         .o_statfs               = lmv_statfs,
3002         .o_get_info             = lmv_get_info,
3003         .o_set_info_async       = lmv_set_info_async,
3004         .o_packmd               = lmv_packmd,
3005         .o_unpackmd             = lmv_unpackmd,
3006         .o_notify               = lmv_notify,
3007         .o_get_uuid             = lmv_get_uuid,
3008         .o_iocontrol            = lmv_iocontrol,
3009         .o_fid_delete           = lmv_fid_delete
3010 };
3011
3012 struct md_ops lmv_md_ops = {
3013         .m_getstatus            = lmv_getstatus,
3014         .m_change_cbdata        = lmv_change_cbdata,
3015         .m_close                = lmv_close,
3016         .m_create               = lmv_create,
3017         .m_done_writing         = lmv_done_writing,
3018         .m_enqueue              = lmv_enqueue,
3019         .m_getattr              = lmv_getattr,
3020         .m_getxattr             = lmv_getxattr,
3021         .m_getattr_name         = lmv_getattr_name,
3022         .m_intent_lock          = lmv_intent_lock,
3023         .m_link                 = lmv_link,
3024         .m_rename               = lmv_rename,
3025         .m_setattr              = lmv_setattr,
3026         .m_setxattr             = lmv_setxattr,
3027         .m_sync                 = lmv_sync,
3028         .m_readpage             = lmv_readpage,
3029         .m_unlink               = lmv_unlink,
3030         .m_init_ea_size         = lmv_init_ea_size,
3031         .m_cancel_unused        = lmv_cancel_unused,
3032         .m_set_lock_data        = lmv_set_lock_data,
3033         .m_lock_match           = lmv_lock_match,
3034         .m_get_lustre_md        = lmv_get_lustre_md,
3035         .m_free_lustre_md       = lmv_free_lustre_md,
3036         .m_set_open_replay_data = lmv_set_open_replay_data,
3037         .m_clear_open_replay_data = lmv_clear_open_replay_data,
3038         .m_renew_capa           = lmv_renew_capa,
3039         .m_unpack_capa          = lmv_unpack_capa,
3040         .m_get_remote_perm      = lmv_get_remote_perm,
3041         .m_intent_getattr_async = lmv_intent_getattr_async,
3042         .m_revalidate_lock      = lmv_revalidate_lock
3043 };
3044
3045 static quota_interface_t *quota_interface;
3046 extern quota_interface_t lmv_quota_interface;
3047
3048 int __init lmv_init(void)
3049 {
3050         struct lprocfs_static_vars lvars;
3051         int                        rc;
3052
3053         lmv_object_cache = cfs_mem_cache_create("lmv_objects",
3054                                                 sizeof(struct lmv_object),
3055                                                 0, 0);
3056         if (!lmv_object_cache) {
3057                 CERROR("Error allocating lmv objects cache\n");
3058                 return -ENOMEM;
3059         }
3060
3061         lprocfs_lmv_init_vars(&lvars);
3062
3063         cfs_request_module("lquota");
3064         quota_interface = PORTAL_SYMBOL_GET(lmv_quota_interface);
3065         init_obd_quota_ops(quota_interface, &lmv_obd_ops);
3066
3067         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
3068                                  lvars.module_vars, LUSTRE_LMV_NAME, NULL);
3069         if (rc) {
3070                 if (quota_interface)
3071                         PORTAL_SYMBOL_PUT(lmv_quota_interface);
3072                 cfs_mem_cache_destroy(lmv_object_cache);
3073         }
3074
3075         return rc;
3076 }
3077
3078 #ifdef __KERNEL__
3079 static void lmv_exit(void)
3080 {
3081         if (quota_interface)
3082                 PORTAL_SYMBOL_PUT(lmv_quota_interface);
3083
3084         class_unregister_type(LUSTRE_LMV_NAME);
3085
3086         LASSERTF(cfs_atomic_read(&lmv_object_count) == 0,
3087                  "Can't free lmv objects cache, %d object(s) busy\n",
3088                  cfs_atomic_read(&lmv_object_count));
3089         cfs_mem_cache_destroy(lmv_object_cache);
3090 }
3091
3092 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3093 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
3094 MODULE_LICENSE("GPL");
3095
3096 module_init(lmv_init);
3097 module_exit(lmv_exit);
3098 #endif