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 (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  *
  32  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  33  */
  34 /*
  35  * This file is part of Lustre, http://www.lustre.org/
  36  * Lustre is a trademark of Sun Microsystems, Inc.
  37  */
  38
  39 #ifndef EXPORT_SYMTAB
  40 # define EXPORT_SYMTAB
  41 #endif
  42 #define DEBUG_SUBSYSTEM S_LMV
  43 #ifdef __KERNEL__
  44 #include <linux/slab.h>
  45 #include <linux/module.h>
  46 #include <linux/init.h>
  47 #include <linux/slab.h>
  48 #include <linux/pagemap.h>
  49 #include <linux/mm.h>
  50 #include <asm/div64.h>
  51 #include <linux/seq_file.h>
  52 #include <linux/namei.h>
  53 #else
  54 #include <liblustre.h>
  55 #endif
  56
  57 #include <lustre_log.h>
  58 #include <obd_support.h>
  59 #include <lustre_lib.h>
  60 #include <lustre_net.h>
  61 #include <obd_class.h>
  62 #include <lprocfs_status.h>
  63 #include <lustre_lite.h>
  64 #include <lustre_fid.h>
  65 #include "lmv_internal.h"
  66
  67 /* object cache. */
  68 cfs_mem_cache_t *lmv_object_cache;
  69 cfs_atomic_t lmv_object_count = CFS_ATOMIC_INIT(0);
  70
  71 static void lmv_activate_target(struct lmv_obd *lmv,
  72                                 struct lmv_tgt_desc *tgt,
  73                                 int activate)
  74 {
  75         if (tgt->ltd_active == activate)
  76                 return;
  77
  78         tgt->ltd_active = activate;
  79         lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
  80 }
  81
  82 /**
  83  * Error codes:
  84  *
  85  *  -EINVAL  : UUID can't be found in the LMV's target list
  86  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
  87  *  -EBADF   : The UUID is found, but the OBD of the wrong type (!)
  88  */
  89 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
  90                               int activate)
  91 {
  92         struct lmv_tgt_desc    *tgt;
  93         struct obd_device      *obd;
  94         int                     i;
  95         int                     rc = 0;
  96         ENTRY;
  97
  98         CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
  99                lmv, uuid->uuid, activate);
 100
 101         cfs_spin_lock(&lmv->lmv_lock);
 102         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 103                 if (tgt->ltd_exp == NULL)
 104                         continue;
 105
 106                 CDEBUG(D_INFO, "Target idx %d is %s conn "LPX64"\n",
 107                        i, tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
 108
 109                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 110                         break;
 111         }
 112
 113         if (i == lmv->desc.ld_tgt_count)
 114                 GOTO(out_lmv_lock, rc = -EINVAL);
 115
 116         obd = class_exp2obd(tgt->ltd_exp);
 117         if (obd == NULL)
 118                 GOTO(out_lmv_lock, rc = -ENOTCONN);
 119
 120         CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
 121                obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
 122                obd->obd_type->typ_name, i);
 123         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
 124
 125         if (tgt->ltd_active == activate) {
 126                 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
 127                        activate ? "" : "in");
 128                 GOTO(out_lmv_lock, rc);
 129         }
 130
 131         CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
 132                activate ? "" : "in");
 133         lmv_activate_target(lmv, tgt, activate);
 134         EXIT;
 135
 136  out_lmv_lock:
 137         cfs_spin_unlock(&lmv->lmv_lock);
 138         return rc;
 139 }
 140
 141 static int lmv_set_mdc_data(struct lmv_obd *lmv, struct obd_uuid *uuid,
 142                             struct obd_connect_data *data)
 143 {
 144         struct lmv_tgt_desc    *tgt;
 145         int                     i;
 146         ENTRY;
 147
 148         LASSERT(data != NULL);
 149
 150         cfs_spin_lock(&lmv->lmv_lock);
 151         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 152                 if (tgt->ltd_exp == NULL)
 153                         continue;
 154
 155                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 156                         lmv->datas[tgt->ltd_idx] = *data;
 157                         break;
 158                 }
 159         }
 160         cfs_spin_unlock(&lmv->lmv_lock);
 161         RETURN(0);
 162 }
 163
 164 struct obd_uuid *lmv_get_uuid(struct obd_export *exp) {
 165         struct obd_device *obd = exp->exp_obd;
 166         struct lmv_obd *lmv = &obd->u.lmv;
 167         return obd_get_uuid(lmv->tgts[0].ltd_exp);
 168 }
 169
 170 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
 171                       enum obd_notify_event ev, void *data)
 172 {
 173         struct obd_connect_data *conn_data;
 174         struct lmv_obd          *lmv = &obd->u.lmv;
 175         struct obd_uuid         *uuid;
 176         int                      rc = 0;
 177         ENTRY;
 178
 179         if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 180                 CERROR("unexpected notification of %s %s!\n",
 181                        watched->obd_type->typ_name,
 182                        watched->obd_name);
 183                 RETURN(-EINVAL);
 184         }
 185
 186         uuid = &watched->u.cli.cl_target_uuid;
 187         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
 188                 /*
 189                  * Set MDC as active before notifying the observer, so the
 190                  * observer can use the MDC normally.
 191                  */
 192                 rc = lmv_set_mdc_active(lmv, uuid,
 193                                         ev == OBD_NOTIFY_ACTIVE);
 194                 if (rc) {
 195                         CERROR("%sactivation of %s failed: %d\n",
 196                                ev == OBD_NOTIFY_ACTIVE ? "" : "de",
 197                                uuid->uuid, rc);
 198                         RETURN(rc);
 199                 }
 200         } else if (ev == OBD_NOTIFY_OCD) {
 201                 conn_data = &watched->u.cli.cl_import->imp_connect_data;
 202
 203                 /*
 204                  * Set connect data to desired target, update exp_connect_flags.
 205                  */
 206                 rc = lmv_set_mdc_data(lmv, uuid, conn_data);
 207                 if (rc) {
 208                         CERROR("can't set connect data to target %s, rc %d\n",
 209                                uuid->uuid, rc);
 210                         RETURN(rc);
 211                 }
 212
 213                 /*
 214                  * XXX: Make sure that ocd_connect_flags from all targets are
 215                  * the same. Otherwise one of MDTs runs wrong version or
 216                  * something like this.  --umka
 217                  */
 218                 obd->obd_self_export->exp_connect_flags =
 219                         conn_data->ocd_connect_flags;
 220         }
 221 #if 0
 222         else if (ev == OBD_NOTIFY_DISCON) {
 223                 /*
 224                  * For disconnect event, flush fld cache for failout MDS case.
 225                  */
 226                 fld_client_flush(&lmv->lmv_fld);
 227         }
 228 #endif
 229         /*
 230          * Pass the notification up the chain.
 231          */
 232         if (obd->obd_observer)
 233                 rc = obd_notify(obd->obd_observer, watched, ev, data);
 234
 235         RETURN(rc);
 236 }
 237
 238 /**
 239  * This is fake connect function. Its purpose is to initialize lmv and say
 240  * caller that everything is okay. Real connection will be performed later.
 241  */
 242 static int lmv_connect(const struct lu_env *env,
 243                        struct obd_export **exp, struct obd_device *obd,
 244                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 245                        void *localdata)
 246 {
 247 #ifdef __KERNEL__
 248         struct proc_dir_entry *lmv_proc_dir;
 249 #endif
 250         struct lmv_obd        *lmv = &obd->u.lmv;
 251         struct lustre_handle  conn = { 0 };
 252         int                    rc = 0;
 253         ENTRY;
 254
 255         /*
 256          * We don't want to actually do the underlying connections more than
 257          * once, so keep track.
 258          */
 259         lmv->refcount++;
 260         if (lmv->refcount > 1) {
 261                 *exp = NULL;
 262                 RETURN(0);
 263         }
 264
 265         rc = class_connect(&conn, obd, cluuid);
 266         if (rc) {
 267                 CERROR("class_connection() returned %d\n", rc);
 268                 RETURN(rc);
 269         }
 270
 271         *exp = class_conn2export(&conn);
 272         class_export_get(*exp);
 273
 274         lmv->exp = *exp;
 275         lmv->connected = 0;
 276         lmv->cluuid = *cluuid;
 277
 278         if (data)
 279                 lmv->conn_data = *data;
 280
 281 #ifdef __KERNEL__
 282         lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
 283                                         NULL, NULL);
 284         if (IS_ERR(lmv_proc_dir)) {
 285                 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
 286                        obd->obd_type->typ_name, obd->obd_name);
 287                 lmv_proc_dir = NULL;
 288         }
 289 #endif
 290
 291         /*
 292          * All real clients should perform actual connection right away, because
 293          * it is possible, that LMV will not have opportunity to connect targets
 294          * and MDC stuff will be called directly, for instance while reading
 295          * ../mdc/../kbytesfree procfs file, etc.
 296          */
 297         if (data->ocd_connect_flags & OBD_CONNECT_REAL)
 298                 rc = lmv_check_connect(obd);
 299
 300 #ifdef __KERNEL__
 301         if (rc) {
 302                 if (lmv_proc_dir)
 303                         lprocfs_remove(&lmv_proc_dir);
 304         }
 305 #endif
 306
 307         RETURN(rc);
 308 }
 309
 310 static void lmv_set_timeouts(struct obd_device *obd)
 311 {
 312         struct lmv_tgt_desc   *tgts;
 313         struct lmv_obd        *lmv;
 314         int                    i;
 315
 316         lmv = &obd->u.lmv;
 317         if (lmv->server_timeout == 0)
 318                 return;
 319
 320         if (lmv->connected == 0)
 321                 return;
 322
 323         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 324                 if (tgts->ltd_exp == NULL)
 325                         continue;
 326
 327                 obd_set_info_async(tgts->ltd_exp, sizeof(KEY_INTERMDS),
 328                                    KEY_INTERMDS, 0, NULL, NULL);
 329         }
 330 }
 331
 332 static int lmv_init_ea_size(struct obd_export *exp, int easize,
 333                             int def_easize, int cookiesize)
 334 {
 335         struct obd_device   *obd = exp->exp_obd;
 336         struct lmv_obd      *lmv = &obd->u.lmv;
 337         int                  i;
 338         int                  rc = 0;
 339         int                  change = 0;
 340         ENTRY;
 341
 342         if (lmv->max_easize < easize) {
 343                 lmv->max_easize = easize;
 344                 change = 1;
 345         }
 346         if (lmv->max_def_easize < def_easize) {
 347                 lmv->max_def_easize = def_easize;
 348                 change = 1;
 349         }
 350         if (lmv->max_cookiesize < cookiesize) {
 351                 lmv->max_cookiesize = cookiesize;
 352                 change = 1;
 353         }
 354         if (change == 0)
 355                 RETURN(0);
 356
 357         if (lmv->connected == 0)
 358                 RETURN(0);
 359
 360         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 361                 if (lmv->tgts[i].ltd_exp == NULL) {
 362                         CWARN("%s: NULL export for %d\n", obd->obd_name, i);
 363                         continue;
 364                 }
 365
 366                 rc = md_init_ea_size(lmv->tgts[i].ltd_exp, easize, def_easize,
 367                                      cookiesize);
 368                 if (rc) {
 369                         CERROR("obd_init_ea_size() failed on MDT target %d, "
 370                                "error %d.\n", i, rc);
 371                         break;
 372                 }
 373         }
 374         RETURN(rc);
 375 }
 376
 377 #define MAX_STRING_SIZE 128
 378
 379 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 380 {
 381 #ifdef __KERNEL__
 382         struct proc_dir_entry   *lmv_proc_dir;
 383 #endif
 384         struct lmv_obd          *lmv = &obd->u.lmv;
 385         struct obd_uuid         *cluuid = &lmv->cluuid;
 386         struct obd_connect_data *mdc_data = NULL;
 387         struct obd_uuid          lmv_mdc_uuid = { "LMV_MDC_UUID" };
 388         struct obd_device       *mdc_obd;
 389         struct obd_export       *mdc_exp;
 390         struct lu_fld_target     target;
 391         int                      rc;
 392         ENTRY;
 393
 394         mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
 395                                         &obd->obd_uuid);
 396         if (!mdc_obd) {
 397                 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
 398                 RETURN(-EINVAL);
 399         }
 400
 401         CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
 402                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 403                 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
 404                 cluuid->uuid);
 405
 406         if (!mdc_obd->obd_set_up) {
 407                 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
 408                 RETURN(-EINVAL);
 409         }
 410
 411         rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
 412                          &lmv->conn_data, NULL);
 413         if (rc) {
 414                 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
 415                 RETURN(rc);
 416         }
 417
 418         /*
 419          * Init fid sequence client for this mdc and add new fld target.
 420          */
 421         rc = obd_fid_init(mdc_exp);
 422         if (rc)
 423                 RETURN(rc);
 424
 425         target.ft_srv = NULL;
 426         target.ft_exp = mdc_exp;
 427         target.ft_idx = tgt->ltd_idx;
 428
 429         fld_client_add_target(&lmv->lmv_fld, &target);
 430
 431         mdc_data = &class_exp2cliimp(mdc_exp)->imp_connect_data;
 432
 433         rc = obd_register_observer(mdc_obd, obd);
 434         if (rc) {
 435                 obd_disconnect(mdc_exp);
 436                 CERROR("target %s register_observer error %d\n",
 437                        tgt->ltd_uuid.uuid, rc);
 438                 RETURN(rc);
 439         }
 440
 441         if (obd->obd_observer) {
 442                 /*
 443                  * Tell the observer about the new target.
 444                  */
 445                 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
 446                                 OBD_NOTIFY_ACTIVE, (void *)(tgt - lmv->tgts));
 447                 if (rc) {
 448                         obd_disconnect(mdc_exp);
 449                         RETURN(rc);
 450                 }
 451         }
 452
 453         tgt->ltd_active = 1;
 454         tgt->ltd_exp = mdc_exp;
 455         lmv->desc.ld_active_tgt_count++;
 456
 457         /*
 458          * Copy connect data, it may be used later.
 459          */
 460         lmv->datas[tgt->ltd_idx] = *mdc_data;
 461
 462         md_init_ea_size(tgt->ltd_exp, lmv->max_easize,
 463                         lmv->max_def_easize, lmv->max_cookiesize);
 464
 465         CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
 466                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 467                 cfs_atomic_read(&obd->obd_refcount));
 468
 469 #ifdef __KERNEL__
 470         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 471         if (lmv_proc_dir) {
 472                 struct proc_dir_entry *mdc_symlink;
 473
 474                 LASSERT(mdc_obd->obd_type != NULL);
 475                 LASSERT(mdc_obd->obd_type->typ_name != NULL);
 476                 mdc_symlink = lprocfs_add_symlink(mdc_obd->obd_name,
 477                                                   lmv_proc_dir,
 478                                                   "../../../%s/%s",
 479                                                   mdc_obd->obd_type->typ_name,
 480                                                   mdc_obd->obd_name);
 481                 if (mdc_symlink == NULL) {
 482                         CERROR("Could not register LMV target "
 483                                "/proc/fs/lustre/%s/%s/target_obds/%s.",
 484                                obd->obd_type->typ_name, obd->obd_name,
 485                                mdc_obd->obd_name);
 486                         lprocfs_remove(&lmv_proc_dir);
 487                         lmv_proc_dir = NULL;
 488                 }
 489         }
 490 #endif
 491         RETURN(0);
 492 }
 493
 494 int lmv_add_target(struct obd_device *obd, struct obd_uuid *tgt_uuid)
 495 {
 496         struct lmv_obd      *lmv = &obd->u.lmv;
 497         struct lmv_tgt_desc *tgt;
 498         int                  rc = 0;
 499         ENTRY;
 500
 501         CDEBUG(D_CONFIG, "Target uuid: %s.\n", tgt_uuid->uuid);
 502
 503         lmv_init_lock(lmv);
 504
 505         if (lmv->desc.ld_active_tgt_count >= LMV_MAX_TGT_COUNT) {
 506                 lmv_init_unlock(lmv);
 507                 CERROR("Can't add %s, LMV module compiled for %d MDCs. "
 508                        "That many MDCs already configured.\n",
 509                        tgt_uuid->uuid, LMV_MAX_TGT_COUNT);
 510                 RETURN(-EINVAL);
 511         }
 512         if (lmv->desc.ld_tgt_count == 0) {
 513                 struct obd_device *mdc_obd;
 514
 515                 mdc_obd = class_find_client_obd(tgt_uuid, LUSTRE_MDC_NAME,
 516                                                 &obd->obd_uuid);
 517                 if (!mdc_obd) {
 518                         lmv_init_unlock(lmv);
 519                         CERROR("Target %s not attached\n", tgt_uuid->uuid);
 520                         RETURN(-EINVAL);
 521                 }
 522
 523                 rc = obd_llog_init(obd, &obd->obd_olg, mdc_obd, NULL);
 524                 if (rc) {
 525                         lmv_init_unlock(lmv);
 526                         CERROR("lmv failed to setup llogging subsystems\n");
 527                 }
 528         }
 529         cfs_spin_lock(&lmv->lmv_lock);
 530         tgt = lmv->tgts + lmv->desc.ld_tgt_count++;
 531         tgt->ltd_uuid = *tgt_uuid;
 532         cfs_spin_unlock(&lmv->lmv_lock);
 533
 534         if (lmv->connected) {
 535                 rc = lmv_connect_mdc(obd, tgt);
 536                 if (rc) {
 537                         cfs_spin_lock(&lmv->lmv_lock);
 538                         lmv->desc.ld_tgt_count--;
 539                         memset(tgt, 0, sizeof(*tgt));
 540                         cfs_spin_unlock(&lmv->lmv_lock);
 541                 } else {
 542                         int easize = sizeof(struct lmv_stripe_md) +
 543                                      lmv->desc.ld_tgt_count *
 544                                      sizeof(struct lu_fid);
 545                         lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
 546                 }
 547         }
 548
 549         lmv_init_unlock(lmv);
 550         RETURN(rc);
 551 }
 552
 553 int lmv_check_connect(struct obd_device *obd)
 554 {
 555         struct lmv_obd       *lmv = &obd->u.lmv;
 556         struct lmv_tgt_desc  *tgt;
 557         int                   i;
 558         int                   rc;
 559         int                   easize;
 560         ENTRY;
 561
 562         if (lmv->connected)
 563                 RETURN(0);
 564
 565         lmv_init_lock(lmv);
 566         if (lmv->connected) {
 567                 lmv_init_unlock(lmv);
 568                 RETURN(0);
 569         }
 570
 571         if (lmv->desc.ld_tgt_count == 0) {
 572                 CERROR("%s: no targets configured.\n", obd->obd_name);
 573                 RETURN(-EINVAL);
 574         }
 575
 576         CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
 577                lmv->cluuid.uuid, obd->obd_name);
 578
 579         LASSERT(lmv->tgts != NULL);
 580
 581         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 582                 rc = lmv_connect_mdc(obd, tgt);
 583                 if (rc)
 584                         GOTO(out_disc, rc);
 585         }
 586
 587         lmv_set_timeouts(obd);
 588         class_export_put(lmv->exp);
 589         lmv->connected = 1;
 590         easize = lmv_get_easize(lmv);
 591         lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
 592         lmv_init_unlock(lmv);
 593         RETURN(0);
 594
 595  out_disc:
 596         while (i-- > 0) {
 597                 int rc2;
 598                 --tgt;
 599                 tgt->ltd_active = 0;
 600                 if (tgt->ltd_exp) {
 601                         --lmv->desc.ld_active_tgt_count;
 602                         rc2 = obd_disconnect(tgt->ltd_exp);
 603                         if (rc2) {
 604                                 CERROR("LMV target %s disconnect on "
 605                                        "MDC idx %d: error %d\n",
 606                                        tgt->ltd_uuid.uuid, i, rc2);
 607                         }
 608                 }
 609         }
 610         class_disconnect(lmv->exp);
 611         lmv_init_unlock(lmv);
 612         RETURN(rc);
 613 }
 614
 615 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 616 {
 617 #ifdef __KERNEL__
 618         struct proc_dir_entry  *lmv_proc_dir;
 619 #endif
 620         struct lmv_obd         *lmv = &obd->u.lmv;
 621         struct obd_device      *mdc_obd;
 622         int                     rc;
 623         ENTRY;
 624
 625         LASSERT(tgt != NULL);
 626         LASSERT(obd != NULL);
 627
 628         mdc_obd = class_exp2obd(tgt->ltd_exp);
 629
 630         if (mdc_obd) {
 631                 mdc_obd->obd_force = obd->obd_force;
 632                 mdc_obd->obd_fail = obd->obd_fail;
 633                 mdc_obd->obd_no_recov = obd->obd_no_recov;
 634         }
 635
 636 #ifdef __KERNEL__
 637         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 638         if (lmv_proc_dir) {
 639                 struct proc_dir_entry *mdc_symlink;
 640
 641                 mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
 642                 if (mdc_symlink) {
 643                         lprocfs_remove(&mdc_symlink);
 644                 } else {
 645                         CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
 646                                obd->obd_type->typ_name, obd->obd_name,
 647                                mdc_obd->obd_name);
 648                 }
 649         }
 650 #endif
 651         rc = obd_fid_fini(tgt->ltd_exp);
 652         if (rc)
 653                 CERROR("Can't finanize fids factory\n");
 654
 655         CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
 656                tgt->ltd_exp->exp_obd->obd_name,
 657                tgt->ltd_exp->exp_obd->obd_uuid.uuid);
 658
 659         obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
 660         rc = obd_disconnect(tgt->ltd_exp);
 661         if (rc) {
 662                 if (tgt->ltd_active) {
 663                         CERROR("Target %s disconnect error %d\n",
 664                                tgt->ltd_uuid.uuid, rc);
 665                 }
 666         }
 667
 668         lmv_activate_target(lmv, tgt, 0);
 669         tgt->ltd_exp = NULL;
 670         RETURN(0);
 671 }
 672
 673 static int lmv_disconnect(struct obd_export *exp)
 674 {
 675         struct obd_device     *obd = class_exp2obd(exp);
 676 #ifdef __KERNEL__
 677         struct proc_dir_entry *lmv_proc_dir;
 678 #endif
 679         struct lmv_obd        *lmv = &obd->u.lmv;
 680         int                    rc;
 681         int                    i;
 682         ENTRY;
 683
 684         if (!lmv->tgts)
 685                 goto out_local;
 686
 687         /*
 688          * Only disconnect the underlying layers on the final disconnect.
 689          */
 690         lmv->refcount--;
 691         if (lmv->refcount != 0)
 692                 goto out_local;
 693
 694         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 695                 if (lmv->tgts[i].ltd_exp == NULL)
 696                         continue;
 697                 lmv_disconnect_mdc(obd, &lmv->tgts[i]);
 698         }
 699
 700 #ifdef __KERNEL__
 701         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 702         if (lmv_proc_dir) {
 703                 lprocfs_remove(&lmv_proc_dir);
 704         } else {
 705                 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
 706                        obd->obd_type->typ_name, obd->obd_name);
 707         }
 708 #endif
 709
 710 out_local:
 711         /*
 712          * This is the case when no real connection is established by
 713          * lmv_check_connect().
 714          */
 715         if (!lmv->connected)
 716                 class_export_put(exp);
 717         rc = class_disconnect(exp);
 718         if (lmv->refcount == 0)
 719                 lmv->connected = 0;
 720         RETURN(rc);
 721 }
 722
 723 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 724                          int len, void *karg, void *uarg)
 725 {
 726         struct obd_device    *obddev = class_exp2obd(exp);
 727         struct lmv_obd       *lmv = &obddev->u.lmv;
 728         int                   i = 0;
 729         int                   rc = 0;
 730         int                   set = 0;
 731         int                   count = lmv->desc.ld_tgt_count;
 732         ENTRY;
 733
 734         if (count == 0)
 735                 RETURN(-ENOTTY);
 736
 737         switch (cmd) {
 738         case IOC_OBD_STATFS: {
 739                 struct obd_ioctl_data *data = karg;
 740                 struct obd_device *mdc_obd;
 741                 struct obd_statfs stat_buf = {0};
 742                 __u32 index;
 743
 744                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
 745                 if ((index >= count))
 746                         RETURN(-ENODEV);
 747
 748                 if (!lmv->tgts[index].ltd_active)
 749                         RETURN(-ENODATA);
 750
 751                 mdc_obd = class_exp2obd(lmv->tgts[index].ltd_exp);
 752                 if (!mdc_obd)
 753                         RETURN(-EINVAL);
 754
 755                 /* copy UUID */
 756                 if (cfs_copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
 757                                      min((int) data->ioc_plen2,
 758                                          (int) sizeof(struct obd_uuid))))
 759                         RETURN(-EFAULT);
 760
 761                 rc = obd_statfs(mdc_obd, &stat_buf,
 762                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 763                                 0);
 764                 if (rc)
 765                         RETURN(rc);
 766                 if (cfs_copy_to_user(data->ioc_pbuf1, &stat_buf,
 767                                      min((int) data->ioc_plen1,
 768                                          (int) sizeof(stat_buf))))
 769                         RETURN(-EFAULT);
 770                 break;
 771         }
 772         case OBD_IOC_QUOTACTL: {
 773                 struct if_quotactl *qctl = karg;
 774                 struct lmv_tgt_desc *tgt = NULL;
 775                 struct obd_quotactl *oqctl;
 776
 777                 if (qctl->qc_valid == QC_MDTIDX) {
 778                         if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
 779                                 RETURN(-EINVAL);
 780
 781                         tgt = &lmv->tgts[qctl->qc_idx];
 782                         if (!tgt->ltd_exp)
 783                                 RETURN(-EINVAL);
 784                 } else if (qctl->qc_valid == QC_UUID) {
 785                         for (i = 0; i < count; i++) {
 786                                 tgt = &lmv->tgts[i];
 787                                 if (!obd_uuid_equals(&tgt->ltd_uuid,
 788                                                      &qctl->obd_uuid))
 789                                         continue;
 790
 791                                 if (tgt->ltd_exp == NULL)
 792                                         RETURN(-EINVAL);
 793
 794                                 break;
 795                         }
 796                 } else {
 797                         RETURN(-EINVAL);
 798                 }
 799
 800                 if (i >= count)
 801                         RETURN(-EAGAIN);
 802
 803                 LASSERT(tgt && tgt->ltd_exp);
 804                 OBD_ALLOC_PTR(oqctl);
 805                 if (!oqctl)
 806                         RETURN(-ENOMEM);
 807
 808                 QCTL_COPY(oqctl, qctl);
 809                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
 810                 if (rc == 0) {
 811                         QCTL_COPY(qctl, oqctl);
 812                         qctl->qc_valid = QC_MDTIDX;
 813                         qctl->obd_uuid = tgt->ltd_uuid;
 814                 }
 815                 OBD_FREE_PTR(oqctl);
 816                 break;
 817         }
 818         case OBD_IOC_CHANGELOG_SEND:
 819         case OBD_IOC_CHANGELOG_CLEAR: {
 820                 struct ioc_changelog *icc = karg;
 821
 822                 if (icc->icc_mdtindex >= count)
 823                         RETURN(-ENODEV);
 824
 825                 rc = obd_iocontrol(cmd, lmv->tgts[icc->icc_mdtindex].ltd_exp,
 826                                    sizeof(*icc), icc, NULL);
 827                 break;
 828         }
 829         case LL_IOC_GET_CONNECT_FLAGS: {
 830                 rc = obd_iocontrol(cmd, lmv->tgts[0].ltd_exp, len, karg, uarg);
 831                 break;
 832         }
 833
 834         default : {
 835                 for (i = 0; i < count; i++) {
 836                         int err;
 837                         struct obd_device *mdc_obd;
 838
 839                         if (lmv->tgts[i].ltd_exp == NULL)
 840                                 continue;
 841                         /* ll_umount_begin() sets force flag but for lmv, not
 842                          * mdc. Let's pass it through */
 843                         mdc_obd = class_exp2obd(lmv->tgts[i].ltd_exp);
 844                         mdc_obd->obd_force = obddev->obd_force;
 845                         err = obd_iocontrol(cmd, lmv->tgts[i].ltd_exp, len,
 846                                             karg, uarg);
 847                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
 848                                 RETURN(err);
 849                         } else if (err) {
 850                                 if (lmv->tgts[i].ltd_active) {
 851                                         CERROR("error: iocontrol MDC %s on MDT"
 852                                                "idx %d cmd %x: err = %d\n",
 853                                                 lmv->tgts[i].ltd_uuid.uuid,
 854                                                 i, cmd, err);
 855                                         if (!rc)
 856                                                 rc = err;
 857                                 }
 858                         } else
 859                                 set = 1;
 860                 }
 861                 if (!set && !rc)
 862                         rc = -EIO;
 863         }
 864         }
 865         RETURN(rc);
 866 }
 867
 868 static int lmv_all_chars_policy(int count, const char *name,
 869                                 int len)
 870 {
 871         unsigned int c = 0;
 872
 873         while (len > 0)
 874                 c += name[--len];
 875         c = c % count;
 876         return c;
 877 }
 878
 879 static int lmv_nid_policy(struct lmv_obd *lmv)
 880 {
 881         struct obd_import *imp;
 882         __u32              id;
 883
 884         /*
 885          * XXX: To get nid we assume that underlying obd device is mdc.
 886          */
 887         imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
 888         id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
 889         return id % lmv->desc.ld_tgt_count;
 890 }
 891
 892 static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
 893                           placement_policy_t placement)
 894 {
 895         switch (placement) {
 896         case PLACEMENT_CHAR_POLICY:
 897                 return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
 898                                             op_data->op_name,
 899                                             op_data->op_namelen);
 900         case PLACEMENT_NID_POLICY:
 901                 return lmv_nid_policy(lmv);
 902
 903         default:
 904                 break;
 905         }
 906
 907         CERROR("Unsupported placement policy %x\n", placement);
 908         return -EINVAL;
 909 }
 910
 911 /**
 912  * This is _inode_ placement policy function (not name).
 913  */
 914 static int lmv_placement_policy(struct obd_device *obd,
 915                                 struct md_op_data *op_data,
 916                                 mdsno_t *mds)
 917 {
 918         struct lmv_obd          *lmv = &obd->u.lmv;
 919         struct lmv_object       *obj;
 920         int                      rc;
 921         ENTRY;
 922
 923         LASSERT(mds != NULL);
 924
 925         if (lmv->desc.ld_tgt_count == 1) {
 926                 *mds = 0;
 927                 RETURN(0);
 928         }
 929
 930         /*
 931          * Allocate new fid on target according to operation type and parent
 932          * home mds.
 933          */
 934         obj = lmv_object_find(obd, &op_data->op_fid1);
 935         if (obj != NULL || op_data->op_name == NULL ||
 936             op_data->op_opc != LUSTRE_OPC_MKDIR) {
 937                 /*
 938                  * Allocate fid for non-dir or for null name or for case parent
 939                  * dir is split.
 940                  */
 941                 if (obj) {
 942                         lmv_object_put(obj);
 943
 944                         /*
 945                          * If we have this flag turned on, and we see that
 946                          * parent dir is split, this means, that caller did not
 947                          * notice split yet. This is race and we would like to
 948                          * let caller know that.
 949                          */
 950                         if (op_data->op_bias & MDS_CHECK_SPLIT)
 951                                 RETURN(-ERESTART);
 952                 }
 953
 954                 /*
 955                  * Allocate new fid on same mds where parent fid is located and
 956                  * where operation will be sent. In case of split dir, ->op_fid1
 957                  * and ->op_mds here will contain fid and mds of slave directory
 958                  * object (assigned by caller).
 959                  */
 960                 *mds = op_data->op_mds;
 961                 rc = 0;
 962         } else {
 963                 /*
 964                  * Parent directory is not split and we want to create a
 965                  * directory in it. Let's calculate where to place it according
 966                  * to operation data @op_data.
 967                  */
 968                 *mds = lmv_choose_mds(lmv, op_data, lmv->lmv_placement);
 969                 rc = 0;
 970         }
 971
 972         if (rc) {
 973                 CERROR("Can't choose MDS, err = %d\n", rc);
 974         } else {
 975                 LASSERT(*mds < lmv->desc.ld_tgt_count);
 976         }
 977
 978         RETURN(rc);
 979 }
 980
 981 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid,
 982                     mdsno_t mds)
 983 {
 984         struct lmv_tgt_desc *tgt;
 985         int                  rc;
 986         ENTRY;
 987
 988         tgt = lmv_get_target(lmv, mds);
 989
 990         /*
 991          * New seq alloc and FLD setup should be atomic. Otherwise we may find
 992          * on server that seq in new allocated fid is not yet known.
 993          */
 994         cfs_down(&tgt->ltd_fid_sem);
 995
 996         if (!tgt->ltd_active)
 997                 GOTO(out, rc = -ENODEV);
 998
 999         /*
1000          * Asking underlaying tgt layer to allocate new fid.
1001          */
1002         rc = obd_fid_alloc(tgt->ltd_exp, fid, NULL);
1003         if (rc > 0) {
1004                 LASSERT(fid_is_sane(fid));
1005                 rc = 0;
1006         }
1007
1008         EXIT;
1009 out:
1010         cfs_up(&tgt->ltd_fid_sem);
1011         return rc;
1012 }
1013
1014 int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1015                   struct md_op_data *op_data)
1016 {
1017         struct obd_device     *obd = class_exp2obd(exp);
1018         struct lmv_obd        *lmv = &obd->u.lmv;
1019         mdsno_t                mds = 0;
1020         int                    rc;
1021         ENTRY;
1022
1023         LASSERT(op_data != NULL);
1024         LASSERT(fid != NULL);
1025
1026         rc = lmv_placement_policy(obd, op_data, &mds);
1027         if (rc) {
1028                 CERROR("Can't get target for allocating fid, "
1029                        "rc %d\n", rc);
1030                 RETURN(rc);
1031         }
1032
1033         rc = __lmv_fid_alloc(lmv, fid, mds);
1034         if (rc) {
1035                 CERROR("Can't alloc new fid, rc %d\n", rc);
1036                 RETURN(rc);
1037         }
1038
1039         RETURN(rc);
1040 }
1041
1042 static int lmv_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
1043 {
1044         ENTRY;
1045         LASSERT(exp != NULL && fid != NULL);
1046         if (lmv_object_delete(exp, fid)) {
1047                 CDEBUG(D_INODE, "Object "DFID" is destroyed.\n",
1048                        PFID(fid));
1049         }
1050         RETURN(0);
1051 }
1052
1053 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1054 {
1055         struct lmv_obd             *lmv = &obd->u.lmv;
1056         struct lprocfs_static_vars  lvars;
1057         struct lmv_desc            *desc;
1058         int                         rc;
1059         int                         i = 0;
1060         ENTRY;
1061
1062         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1063                 CERROR("LMV setup requires a descriptor\n");
1064                 RETURN(-EINVAL);
1065         }
1066
1067         desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1068         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1069                 CERROR("Lmv descriptor size wrong: %d > %d\n",
1070                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1071                 RETURN(-EINVAL);
1072         }
1073
1074         lmv->tgts_size = LMV_MAX_TGT_COUNT * sizeof(struct lmv_tgt_desc);
1075
1076         OBD_ALLOC(lmv->tgts, lmv->tgts_size);
1077         if (lmv->tgts == NULL)
1078                 RETURN(-ENOMEM);
1079
1080         for (i = 0; i < LMV_MAX_TGT_COUNT; i++) {
1081                 cfs_sema_init(&lmv->tgts[i].ltd_fid_sem, 1);
1082                 lmv->tgts[i].ltd_idx = i;
1083         }
1084
1085         lmv->datas_size = LMV_MAX_TGT_COUNT * sizeof(struct obd_connect_data);
1086
1087         OBD_ALLOC(lmv->datas, lmv->datas_size);
1088         if (lmv->datas == NULL)
1089                 GOTO(out_free_tgts, rc = -ENOMEM);
1090
1091         obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1092         lmv->desc.ld_tgt_count = 0;
1093         lmv->desc.ld_active_tgt_count = 0;
1094         lmv->max_cookiesize = 0;
1095         lmv->max_def_easize = 0;
1096         lmv->max_easize = 0;
1097         lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
1098
1099         cfs_spin_lock_init(&lmv->lmv_lock);
1100         cfs_sema_init(&lmv->init_sem, 1);
1101
1102         rc = lmv_object_setup(obd);
1103         if (rc) {
1104                 CERROR("Can't setup LMV object manager, error %d.\n", rc);
1105                 GOTO(out_free_datas, rc);
1106         }
1107
1108         lprocfs_lmv_init_vars(&lvars);
1109         lprocfs_obd_setup(obd, lvars.obd_vars);
1110 #ifdef LPROCFS
1111         {
1112                 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
1113                                         0444, &lmv_proc_target_fops, obd);
1114                 if (rc)
1115                         CWARN("%s: error adding LMV target_obd file: rc = %d\n",
1116                                obd->obd_name, rc);
1117        }
1118 #endif
1119         rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1120                              LUSTRE_CLI_FLD_HASH_DHT);
1121         if (rc) {
1122                 CERROR("Can't init FLD, err %d\n", rc);
1123                 GOTO(out_free_datas, rc);
1124         }
1125
1126         RETURN(0);
1127
1128 out_free_datas:
1129         OBD_FREE(lmv->datas, lmv->datas_size);
1130         lmv->datas = NULL;
1131 out_free_tgts:
1132         OBD_FREE(lmv->tgts, lmv->tgts_size);
1133         lmv->tgts = NULL;
1134         return rc;
1135 }
1136
1137 static int lmv_cleanup(struct obd_device *obd)
1138 {
1139         struct lmv_obd   *lmv = &obd->u.lmv;
1140         ENTRY;
1141
1142         fld_client_fini(&lmv->lmv_fld);
1143         lmv_object_cleanup(obd);
1144         OBD_FREE(lmv->datas, lmv->datas_size);
1145         OBD_FREE(lmv->tgts, lmv->tgts_size);
1146
1147         RETURN(0);
1148 }
1149
1150 static int lmv_process_config(struct obd_device *obd, obd_count len, void *buf)
1151 {
1152         struct lustre_cfg     *lcfg = buf;
1153         struct obd_uuid        tgt_uuid;
1154         int                    rc;
1155         ENTRY;
1156
1157         switch(lcfg->lcfg_command) {
1158         case LCFG_ADD_MDC:
1159                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(tgt_uuid.uuid))
1160                         GOTO(out, rc = -EINVAL);
1161
1162                 obd_str2uuid(&tgt_uuid, lustre_cfg_string(lcfg, 1));
1163                 rc = lmv_add_target(obd, &tgt_uuid);
1164                 GOTO(out, rc);
1165         default: {
1166                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1167                 GOTO(out, rc = -EINVAL);
1168         }
1169         }
1170 out:
1171         RETURN(rc);
1172 }
1173
1174 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1175                       __u64 max_age, __u32 flags)
1176 {
1177         struct lmv_obd        *lmv = &obd->u.lmv;
1178         struct obd_statfs     *temp;
1179         int                    rc = 0;
1180         int                    i;
1181         ENTRY;
1182
1183         rc = lmv_check_connect(obd);
1184         if (rc)
1185                 RETURN(rc);
1186
1187         OBD_ALLOC(temp, sizeof(*temp));
1188         if (temp == NULL)
1189                 RETURN(-ENOMEM);
1190
1191         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1192                 if (lmv->tgts[i].ltd_exp == NULL)
1193                         continue;
1194
1195                 rc = obd_statfs(lmv->tgts[i].ltd_exp->exp_obd, temp,
1196                                 max_age, flags);
1197                 if (rc) {
1198                         CERROR("can't stat MDS #%d (%s), error %d\n", i,
1199                                lmv->tgts[i].ltd_exp->exp_obd->obd_name,
1200                                rc);
1201                         GOTO(out_free_temp, rc);
1202                 }
1203                 if (i == 0) {
1204                         *osfs = *temp;
1205                 } else {
1206                         osfs->os_bavail += temp->os_bavail;
1207                         osfs->os_blocks += temp->os_blocks;
1208                         osfs->os_ffree += temp->os_ffree;
1209                         osfs->os_files += temp->os_files;
1210                 }
1211         }
1212
1213         EXIT;
1214 out_free_temp:
1215         OBD_FREE(temp, sizeof(*temp));
1216         return rc;
1217 }
1218
1219 static int lmv_getstatus(struct obd_export *exp,
1220                          struct lu_fid *fid,
1221                          struct obd_capa **pc)
1222 {
1223         struct obd_device    *obd = exp->exp_obd;
1224         struct lmv_obd       *lmv = &obd->u.lmv;
1225         int                   rc;
1226         ENTRY;
1227
1228         rc = lmv_check_connect(obd);
1229         if (rc)
1230                 RETURN(rc);
1231
1232         rc = md_getstatus(lmv->tgts[0].ltd_exp, fid, pc);
1233         RETURN(rc);
1234 }
1235
1236 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1237                         struct obd_capa *oc, obd_valid valid, const char *name,
1238                         const char *input, int input_size, int output_size,
1239                         int flags, struct ptlrpc_request **request)
1240 {
1241         struct obd_device      *obd = exp->exp_obd;
1242         struct lmv_obd         *lmv = &obd->u.lmv;
1243         struct lmv_tgt_desc    *tgt;
1244         int                     rc;
1245         ENTRY;
1246
1247         rc = lmv_check_connect(obd);
1248         if (rc)
1249                 RETURN(rc);
1250
1251         tgt = lmv_find_target(lmv, fid);
1252         if (IS_ERR(tgt))
1253                 RETURN(PTR_ERR(tgt));
1254
1255         rc = md_getxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1256                          input_size, output_size, flags, request);
1257
1258         RETURN(rc);
1259 }
1260
1261 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1262                         struct obd_capa *oc, obd_valid valid, const char *name,
1263                         const char *input, int input_size, int output_size,
1264                         int flags, __u32 suppgid,
1265                         struct ptlrpc_request **request)
1266 {
1267         struct obd_device      *obd = exp->exp_obd;
1268         struct lmv_obd         *lmv = &obd->u.lmv;
1269         struct lmv_tgt_desc    *tgt;
1270         int                     rc;
1271         ENTRY;
1272
1273         rc = lmv_check_connect(obd);
1274         if (rc)
1275                 RETURN(rc);
1276
1277         tgt = lmv_find_target(lmv, fid);
1278         if (IS_ERR(tgt))
1279                 RETURN(PTR_ERR(tgt));
1280
1281         rc = md_setxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1282                          input_size, output_size, flags, suppgid,
1283                          request);
1284
1285         RETURN(rc);
1286 }
1287
1288 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1289                        struct ptlrpc_request **request)
1290 {
1291         struct obd_device       *obd = exp->exp_obd;
1292         struct lmv_obd          *lmv = &obd->u.lmv;
1293         struct lmv_tgt_desc     *tgt;
1294         struct lmv_object       *obj;
1295         int                      rc;
1296         int                      i;
1297         ENTRY;
1298
1299         rc = lmv_check_connect(obd);
1300         if (rc)
1301                 RETURN(rc);
1302
1303         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1304         if (IS_ERR(tgt))
1305                 RETURN(PTR_ERR(tgt));
1306
1307         if (op_data->op_valid & OBD_MD_MDTIDX) {
1308                 op_data->op_mds = tgt->ltd_idx;
1309                 RETURN(0);
1310         }
1311
1312         rc = md_getattr(tgt->ltd_exp, op_data, request);
1313         if (rc)
1314                 RETURN(rc);
1315
1316         obj = lmv_object_find_lock(obd, &op_data->op_fid1);
1317
1318         CDEBUG(D_INODE, "GETATTR for "DFID" %s\n", PFID(&op_data->op_fid1),
1319                obj ? "(split)" : "");
1320
1321         /*
1322          * If object is split, then we loop over all the slaves and gather size
1323          * attribute. In ideal world we would have to gather also mds field from
1324          * all slaves, as object is spread over the cluster and this is
1325          * definitely interesting information and it is not good to loss it,
1326          * but...
1327          */
1328         if (obj) {
1329                 struct mdt_body *body;
1330
1331                 if (*request == NULL) {
1332                         lmv_object_put(obj);
1333                         RETURN(rc);
1334                 }
1335
1336                 body = req_capsule_server_get(&(*request)->rq_pill,
1337                                               &RMF_MDT_BODY);
1338                 LASSERT(body != NULL);
1339
1340                 for (i = 0; i < obj->lo_objcount; i++) {
1341                         if (lmv->tgts[i].ltd_exp == NULL) {
1342                                 CWARN("%s: NULL export for %d\n",
1343                                       obd->obd_name, i);
1344                                 continue;
1345                         }
1346
1347                         /*
1348                          * Skip master object.
1349                          */
1350                         if (lu_fid_eq(&obj->lo_fid, &obj->lo_stripes[i].ls_fid))
1351                                 continue;
1352
1353                         body->size += obj->lo_stripes[i].ls_size;
1354                 }
1355
1356                 lmv_object_put_unlock(obj);
1357         }
1358
1359         RETURN(rc);
1360 }
1361
1362 static int lmv_change_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1363                              ldlm_iterator_t it, void *data)
1364 {
1365         struct obd_device   *obd = exp->exp_obd;
1366         struct lmv_obd      *lmv = &obd->u.lmv;
1367         int                  i;
1368         int                  rc;
1369         ENTRY;
1370
1371         rc = lmv_check_connect(obd);
1372         if (rc)
1373                 RETURN(rc);
1374
1375         CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1376
1377         /*
1378          * With CMD every object can have two locks in different namespaces:
1379          * lookup lock in space of mds storing direntry and update/open lock in
1380          * space of mds storing inode.
1381          */
1382         for (i = 0; i < lmv->desc.ld_tgt_count; i++)
1383                 md_change_cbdata(lmv->tgts[i].ltd_exp, fid, it, data);
1384
1385         RETURN(0);
1386 }
1387
1388 static int lmv_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1389                            ldlm_iterator_t it, void *data)
1390 {
1391         struct obd_device   *obd = exp->exp_obd;
1392         struct lmv_obd      *lmv = &obd->u.lmv;
1393         int                  i;
1394         int                  rc;
1395         ENTRY;
1396
1397         rc = lmv_check_connect(obd);
1398         if (rc)
1399                 RETURN(rc);
1400
1401         CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1402
1403         /*
1404          * With CMD every object can have two locks in different namespaces:
1405          * lookup lock in space of mds storing direntry and update/open lock in
1406          * space of mds storing inode.
1407          */
1408         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1409                 rc = md_find_cbdata(lmv->tgts[i].ltd_exp, fid, it, data);
1410                 if (rc)
1411                         RETURN(rc);
1412         }
1413
1414         RETURN(rc);
1415 }
1416
1417
1418 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1419                      struct md_open_data *mod, struct ptlrpc_request **request)
1420 {
1421         struct obd_device     *obd = exp->exp_obd;
1422         struct lmv_obd        *lmv = &obd->u.lmv;
1423         struct lmv_tgt_desc   *tgt;
1424         int                    rc;
1425         ENTRY;
1426
1427         rc = lmv_check_connect(obd);
1428         if (rc)
1429                 RETURN(rc);
1430
1431         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1432         if (IS_ERR(tgt))
1433                 RETURN(PTR_ERR(tgt));
1434
1435         CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1436         rc = md_close(tgt->ltd_exp, op_data, mod, request);
1437         RETURN(rc);
1438 }
1439
1440 /**
1441  * Called in the case MDS returns -ERESTART on create on open, what means that
1442  * directory is split and its LMV presentation object has to be updated.
1443  */
1444 int lmv_handle_split(struct obd_export *exp, const struct lu_fid *fid)
1445 {
1446         struct obd_device       *obd = exp->exp_obd;
1447         struct lmv_obd          *lmv = &obd->u.lmv;
1448         struct ptlrpc_request   *req = NULL;
1449         struct lmv_tgt_desc     *tgt;
1450         struct lmv_object       *obj;
1451         struct lustre_md         md;
1452         struct md_op_data       *op_data;
1453         int                      mealen;
1454         int                      rc;
1455         __u64                    valid;
1456         ENTRY;
1457
1458         md.mea = NULL;
1459         mealen = lmv_get_easize(lmv);
1460
1461         valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA | OBD_MD_MEA;
1462
1463         tgt = lmv_find_target(lmv, fid);
1464         if (IS_ERR(tgt))
1465                 RETURN(PTR_ERR(tgt));
1466
1467         /*
1468          * Time to update mea of parent fid.
1469          */
1470
1471         OBD_ALLOC_PTR(op_data);
1472         if (op_data == NULL)
1473                 RETURN(-ENOMEM);
1474
1475         op_data->op_fid1 = *fid;
1476         op_data->op_mode = mealen;
1477         op_data->op_valid = valid;
1478
1479         rc = md_getattr(tgt->ltd_exp, op_data, &req);
1480         OBD_FREE_PTR(op_data);
1481         if (rc) {
1482                 CERROR("md_getattr() failed, error %d\n", rc);
1483                 GOTO(cleanup, rc);
1484         }
1485
1486         rc = md_get_lustre_md(tgt->ltd_exp, req, NULL, exp, &md);
1487         if (rc) {
1488                 CERROR("md_get_lustre_md() failed, error %d\n", rc);
1489                 GOTO(cleanup, rc);
1490         }
1491
1492         if (md.mea == NULL)
1493                 GOTO(cleanup, rc = -ENODATA);
1494
1495         obj = lmv_object_create(exp, fid, md.mea);
1496         if (IS_ERR(obj))
1497                 rc = PTR_ERR(obj);
1498         else
1499                 lmv_object_put(obj);
1500
1501         obd_free_memmd(exp, (void *)&md.mea);
1502         EXIT;
1503 cleanup:
1504         if (req)
1505                 ptlrpc_req_finished(req);
1506         return rc;
1507 }
1508
1509 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1510                const void *data, int datalen, int mode, __u32 uid,
1511                __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1512                struct ptlrpc_request **request)
1513 {
1514         struct obd_device       *obd = exp->exp_obd;
1515         struct lmv_obd          *lmv = &obd->u.lmv;
1516         struct lmv_tgt_desc     *tgt;
1517         struct lmv_object       *obj;
1518         int                      rc;
1519         int                      loop = 0;
1520         int                      sidx;
1521         ENTRY;
1522
1523         rc = lmv_check_connect(obd);
1524         if (rc)
1525                 RETURN(rc);
1526
1527         if (!lmv->desc.ld_active_tgt_count)
1528                 RETURN(-EIO);
1529 repeat:
1530         ++loop;
1531         LASSERT(loop <= 2);
1532
1533         obj = lmv_object_find(obd, &op_data->op_fid1);
1534         if (obj) {
1535                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1536                                        op_data->op_name, op_data->op_namelen);
1537                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1538                 op_data->op_bias &= ~MDS_CHECK_SPLIT;
1539                 op_data->op_mds = obj->lo_stripes[sidx].ls_mds;
1540                 tgt = lmv_get_target(lmv, op_data->op_mds);
1541                 lmv_object_put(obj);
1542         } else {
1543                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1544                 op_data->op_bias |= MDS_CHECK_SPLIT;
1545                 op_data->op_mds = tgt->ltd_idx;
1546         }
1547
1548         if (IS_ERR(tgt))
1549                 RETURN(PTR_ERR(tgt));
1550
1551         rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
1552         if (rc == -ERESTART)
1553                 goto repeat;
1554         else if (rc)
1555                 RETURN(rc);
1556
1557         CDEBUG(D_INODE, "CREATE '%*s' on "DFID" -> mds #%x\n",
1558                op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1559                op_data->op_mds);
1560
1561         op_data->op_flags |= MF_MDC_CANCEL_FID1;
1562         rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1563                        cap_effective, rdev, request);
1564         if (rc == 0) {
1565                 if (*request == NULL)
1566                         RETURN(rc);
1567                 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1568         } else if (rc == -ERESTART) {
1569                 LASSERT(*request != NULL);
1570                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1571                           "Got -ERESTART during create!\n");
1572                 ptlrpc_req_finished(*request);
1573                 *request = NULL;
1574
1575                 /*
1576                  * Directory got split. Time to update local object and repeat
1577                  * the request with proper MDS.
1578                  */
1579                 rc = lmv_handle_split(exp, &op_data->op_fid1);
1580                 if (rc == 0) {
1581                         rc = lmv_allocate_slaves(obd, &op_data->op_fid1,
1582                                                  op_data, &op_data->op_fid2);
1583                         if (rc)
1584                                 RETURN(rc);
1585                         goto repeat;
1586                 }
1587         }
1588         RETURN(rc);
1589 }
1590
1591 static int lmv_done_writing(struct obd_export *exp,
1592                             struct md_op_data *op_data,
1593                             struct md_open_data *mod)
1594 {
1595         struct obd_device     *obd = exp->exp_obd;
1596         struct lmv_obd        *lmv = &obd->u.lmv;
1597         struct lmv_tgt_desc   *tgt;
1598         int                    rc;
1599         ENTRY;
1600
1601         rc = lmv_check_connect(obd);
1602         if (rc)
1603                 RETURN(rc);
1604
1605         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1606         if (IS_ERR(tgt))
1607                 RETURN(PTR_ERR(tgt));
1608
1609         rc = md_done_writing(tgt->ltd_exp, op_data, mod);
1610         RETURN(rc);
1611 }
1612
1613 static int
1614 lmv_enqueue_slaves(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1615                    struct lookup_intent *it, struct md_op_data *op_data,
1616                    struct lustre_handle *lockh, void *lmm, int lmmsize)
1617 {
1618         struct obd_device     *obd = exp->exp_obd;
1619         struct lmv_obd        *lmv = &obd->u.lmv;
1620         struct lmv_stripe_md  *mea = op_data->op_mea1;
1621         struct md_op_data     *op_data2;
1622         struct lmv_tgt_desc   *tgt;
1623         int                    i;
1624         int                    rc = 0;
1625         ENTRY;
1626
1627         OBD_ALLOC_PTR(op_data2);
1628         if (op_data2 == NULL)
1629                 RETURN(-ENOMEM);
1630
1631         LASSERT(mea != NULL);
1632         for (i = 0; i < mea->mea_count; i++) {
1633                 memset(op_data2, 0, sizeof(*op_data2));
1634                 op_data2->op_fid1 = mea->mea_ids[i];
1635                 op_data2->op_bias = 0;
1636
1637                 tgt = lmv_find_target(lmv, &op_data2->op_fid1);
1638                 if (IS_ERR(tgt))
1639                         GOTO(cleanup, rc = PTR_ERR(tgt));
1640
1641                 if (tgt->ltd_exp == NULL)
1642                         continue;
1643
1644                 rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data2,
1645                                 lockh + i, lmm, lmmsize, NULL, 0);
1646
1647                 CDEBUG(D_INODE, "Take lock on slave "DFID" -> %d/%d\n",
1648                        PFID(&mea->mea_ids[i]), rc, it->d.lustre.it_status);
1649
1650                 if (rc)
1651                         GOTO(cleanup, rc);
1652
1653                 if (it->d.lustre.it_data) {
1654                         struct ptlrpc_request *req;
1655                         req = (struct ptlrpc_request *)it->d.lustre.it_data;
1656                         ptlrpc_req_finished(req);
1657                 }
1658
1659                 if (it->d.lustre.it_status)
1660                         GOTO(cleanup, rc = it->d.lustre.it_status);
1661         }
1662
1663         EXIT;
1664 cleanup:
1665         OBD_FREE_PTR(op_data2);
1666
1667         if (rc != 0) {
1668                 /*
1669                  * Drop all taken locks.
1670                  */
1671                 while (--i >= 0) {
1672                         if (lockh[i].cookie)
1673                                 ldlm_lock_decref(lockh + i, einfo->ei_mode);
1674                         lockh[i].cookie = 0;
1675                 }
1676         }
1677         return rc;
1678 }
1679
1680 static int
1681 lmv_enqueue_remote(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1682                    struct lookup_intent *it, struct md_op_data *op_data,
1683                    struct lustre_handle *lockh, void *lmm, int lmmsize,
1684                    int extra_lock_flags)
1685 {
1686         struct ptlrpc_request      *req = it->d.lustre.it_data;
1687         struct obd_device          *obd = exp->exp_obd;
1688         struct lmv_obd             *lmv = &obd->u.lmv;
1689         struct lustre_handle        plock;
1690         struct lmv_tgt_desc        *tgt;
1691         struct md_op_data          *rdata;
1692         struct lu_fid               fid1;
1693         struct mdt_body            *body;
1694         int                         rc = 0;
1695         int                         pmode;
1696         ENTRY;
1697
1698         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1699         LASSERT(body != NULL);
1700
1701         if (!(body->valid & OBD_MD_MDS))
1702                 RETURN(0);
1703
1704         CDEBUG(D_INODE, "REMOTE_ENQUEUE '%s' on "DFID" -> "DFID"\n",
1705                LL_IT2STR(it), PFID(&op_data->op_fid1), PFID(&body->fid1));
1706
1707         /*
1708          * We got LOOKUP lock, but we really need attrs.
1709          */
1710         pmode = it->d.lustre.it_lock_mode;
1711         LASSERT(pmode != 0);
1712         memcpy(&plock, lockh, sizeof(plock));
1713         it->d.lustre.it_lock_mode = 0;
1714         it->d.lustre.it_data = NULL;
1715         fid1 = body->fid1;
1716
1717         it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
1718         ptlrpc_req_finished(req);
1719
1720         tgt = lmv_find_target(lmv, &fid1);
1721         if (IS_ERR(tgt))
1722                 GOTO(out, rc = PTR_ERR(tgt));
1723
1724         OBD_ALLOC_PTR(rdata);
1725         if (rdata == NULL)
1726                 GOTO(out, rc = -ENOMEM);
1727
1728         rdata->op_fid1 = fid1;
1729         rdata->op_bias = MDS_CROSS_REF;
1730
1731         rc = md_enqueue(tgt->ltd_exp, einfo, it, rdata, lockh,
1732                         lmm, lmmsize, NULL, extra_lock_flags);
1733         OBD_FREE_PTR(rdata);
1734         EXIT;
1735 out:
1736         ldlm_lock_decref(&plock, pmode);
1737         return rc;
1738 }
1739
1740 static int
1741 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1742             struct lookup_intent *it, struct md_op_data *op_data,
1743             struct lustre_handle *lockh, void *lmm, int lmmsize,
1744             struct ptlrpc_request **req, int extra_lock_flags)
1745 {
1746         struct obd_device        *obd = exp->exp_obd;
1747         struct lmv_obd           *lmv = &obd->u.lmv;
1748         struct lmv_tgt_desc      *tgt;
1749         struct lmv_object        *obj;
1750         int                       sidx;
1751         int                       rc;
1752         ENTRY;
1753
1754         rc = lmv_check_connect(obd);
1755         if (rc)
1756                 RETURN(rc);
1757
1758         CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
1759                LL_IT2STR(it), PFID(&op_data->op_fid1));
1760
1761         if (op_data->op_mea1 && it && it->it_op == IT_UNLINK) {
1762                 rc = lmv_enqueue_slaves(exp, einfo, it, op_data,
1763                                         lockh, lmm, lmmsize);
1764                 RETURN(rc);
1765         }
1766
1767         obj = lmv_object_find(obd, &op_data->op_fid1);
1768         if (obj && op_data->op_namelen) {
1769                 sidx = raw_name2idx(obj->lo_hashtype,
1770                                        obj->lo_objcount,
1771                                        (char *)op_data->op_name,
1772                                        op_data->op_namelen);
1773                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1774                 tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
1775         } else {
1776                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1777         }
1778         if (obj)
1779                 lmv_object_put(obj);
1780
1781         if (IS_ERR(tgt))
1782                 RETURN(PTR_ERR(tgt));
1783
1784         CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%d\n",
1785                LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
1786
1787         rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data, lockh,
1788                         lmm, lmmsize, req, extra_lock_flags);
1789
1790         if (rc == 0 && it && it->it_op == IT_OPEN) {
1791                 rc = lmv_enqueue_remote(exp, einfo, it, op_data, lockh,
1792                                         lmm, lmmsize, extra_lock_flags);
1793         }
1794         RETURN(rc);
1795 }
1796
1797 static int
1798 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1799                  struct ptlrpc_request **request)
1800 {
1801         struct ptlrpc_request   *req = NULL;
1802         struct obd_device       *obd = exp->exp_obd;
1803         struct lmv_obd          *lmv = &obd->u.lmv;
1804         struct lu_fid            rid = op_data->op_fid1;
1805         struct lmv_tgt_desc     *tgt;
1806         struct mdt_body         *body;
1807         struct lmv_object       *obj;
1808         obd_valid                valid = op_data->op_valid;
1809         int                      rc;
1810         int                      loop = 0;
1811         int                      sidx;
1812         ENTRY;
1813
1814         rc = lmv_check_connect(obd);
1815         if (rc)
1816                 RETURN(rc);
1817
1818 repeat:
1819         ++loop;
1820         LASSERT(loop <= 2);
1821         obj = lmv_object_find(obd, &rid);
1822         if (obj) {
1823                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1824                                     op_data->op_name, op_data->op_namelen);
1825                 rid = obj->lo_stripes[sidx].ls_fid;
1826                 tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
1827                 op_data->op_mds = obj->lo_stripes[sidx].ls_mds;
1828                 valid &= ~OBD_MD_FLCKSPLIT;
1829                 lmv_object_put(obj);
1830         } else {
1831                 tgt = lmv_find_target(lmv, &rid);
1832                 valid |= OBD_MD_FLCKSPLIT;
1833                 op_data->op_mds = tgt->ltd_idx;
1834         }
1835         if (IS_ERR(tgt))
1836                 RETURN(PTR_ERR(tgt));
1837
1838         CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" - "DFID" -> mds #%d\n",
1839                op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1840                PFID(&rid), tgt->ltd_idx);
1841
1842         op_data->op_valid = valid;
1843         op_data->op_fid1 = rid;
1844         rc = md_getattr_name(tgt->ltd_exp, op_data, request);
1845         if (rc == 0) {
1846                 body = req_capsule_server_get(&(*request)->rq_pill,
1847                                               &RMF_MDT_BODY);
1848                 LASSERT(body != NULL);
1849
1850                 if (body->valid & OBD_MD_MDS) {
1851                         rid = body->fid1;
1852                         CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1853                                PFID(&rid));
1854
1855                         tgt = lmv_find_target(lmv, &rid);
1856                         if (IS_ERR(tgt)) {
1857                                 ptlrpc_req_finished(*request);
1858                                 RETURN(PTR_ERR(tgt));
1859                         }
1860
1861                         op_data->op_fid1 = rid;
1862                         op_data->op_valid |= OBD_MD_FLCROSSREF;
1863                         op_data->op_namelen = 0;
1864                         op_data->op_name = NULL;
1865                         rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
1866                         ptlrpc_req_finished(*request);
1867                         *request = req;
1868                 }
1869         } else if (rc == -ERESTART) {
1870                 LASSERT(*request != NULL);
1871                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1872                           "Got -ERESTART during getattr!\n");
1873                 ptlrpc_req_finished(*request);
1874                 *request = NULL;
1875
1876                 /*
1877                  * Directory got split. Time to update local object and repeat
1878                  * the request with proper MDS.
1879                  */
1880                 rc = lmv_handle_split(exp, &rid);
1881                 if (rc == 0)
1882                         goto repeat;
1883         }
1884         RETURN(rc);
1885 }
1886
1887 #define md_op_data_fid(op_data, fl)                     \
1888         (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1889          fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1890          fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1891          fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1892          NULL)
1893
1894 static int lmv_early_cancel_slaves(struct obd_export *exp,
1895                                    struct md_op_data *op_data, int op_tgt,
1896                                    ldlm_mode_t mode, int bits, int flag)
1897 {
1898         struct obd_device      *obd = exp->exp_obd;
1899         struct lmv_obd         *lmv = &obd->u.lmv;
1900         ldlm_policy_data_t      policy = {{0}};
1901         struct lu_fid          *op_fid;
1902         struct lu_fid          *st_fid;
1903         struct lmv_tgt_desc    *tgt;
1904         struct lmv_object      *obj;
1905         int                     rc = 0;
1906         int                     i;
1907         ENTRY;
1908
1909         op_fid = md_op_data_fid(op_data, flag);
1910         if (!fid_is_sane(op_fid))
1911                 RETURN(0);
1912
1913         obj = lmv_object_find(obd, op_fid);
1914         if (obj == NULL)
1915                 RETURN(-EALREADY);
1916
1917         policy.l_inodebits.bits = bits;
1918         for (i = 0; i < obj->lo_objcount; i++) {
1919                 tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
1920                 st_fid = &obj->lo_stripes[i].ls_fid;
1921                 if (op_tgt != tgt->ltd_idx) {
1922                         CDEBUG(D_INODE, "EARLY_CANCEL slave "DFID" -> mds #%d\n",
1923                                PFID(st_fid), tgt->ltd_idx);
1924                         rc = md_cancel_unused(tgt->ltd_exp, st_fid, &policy,
1925                                               mode, LCF_ASYNC, NULL);
1926                         if (rc)
1927                                 GOTO(out_put_obj, rc);
1928                 } else {
1929                         CDEBUG(D_INODE,
1930                                "EARLY_CANCEL skip operation target %d on "DFID"\n",
1931                                op_tgt, PFID(st_fid));
1932                         /*
1933                          * Do not cancel locks for operation target, they will
1934                          * be handled later in underlaying layer when calling
1935                          * function we run on behalf of.
1936                          */
1937                         *op_fid = *st_fid;
1938                         op_data->op_flags |= flag;
1939                 }
1940         }
1941         EXIT;
1942 out_put_obj:
1943         lmv_object_put(obj);
1944         return rc;
1945 }
1946
1947 static int lmv_early_cancel(struct obd_export *exp, struct md_op_data *op_data,
1948                             int op_tgt, ldlm_mode_t mode, int bits, int flag)
1949 {
1950         struct lu_fid          *fid = md_op_data_fid(op_data, flag);
1951         struct obd_device      *obd = exp->exp_obd;
1952         struct lmv_obd         *lmv = &obd->u.lmv;
1953         struct lmv_tgt_desc    *tgt;
1954         ldlm_policy_data_t      policy = {{0}};
1955         struct lmv_object      *obj;
1956         int                     rc = 0;
1957         ENTRY;
1958
1959         if (!fid_is_sane(fid))
1960                 RETURN(0);
1961
1962         obj = lmv_object_find(obd, fid);
1963         if (obj) {
1964                 rc = lmv_early_cancel_slaves(exp, op_data, op_tgt, mode,
1965                                              bits, flag);
1966                 lmv_object_put(obj);
1967         } else {
1968                 tgt = lmv_find_target(lmv, fid);
1969                 if (IS_ERR(tgt))
1970                         RETURN(PTR_ERR(tgt));
1971
1972                 if (tgt->ltd_idx != op_tgt) {
1973                         CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1974                         policy.l_inodebits.bits = bits;
1975                         rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1976                                               mode, LCF_ASYNC, NULL);
1977                 } else {
1978                         CDEBUG(D_INODE,
1979                                "EARLY_CANCEL skip operation target %d on "DFID"\n",
1980                                op_tgt, PFID(fid));
1981                         op_data->op_flags |= flag;
1982                         rc = 0;
1983                 }
1984
1985         }
1986         RETURN(rc);
1987 }
1988
1989 /*
1990  * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1991  * op_data->op_fid2
1992  */
1993 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1994                     struct ptlrpc_request **request)
1995 {
1996         struct obd_device       *obd = exp->exp_obd;
1997         struct lmv_obd          *lmv = &obd->u.lmv;
1998         struct lmv_tgt_desc     *tgt;
1999         struct lmv_object       *obj;
2000         int                      rc;
2001         int                      loop = 0;
2002         mdsno_t                  mds;
2003         int                      sidx;
2004         ENTRY;
2005
2006         rc = lmv_check_connect(obd);
2007         if (rc)
2008                 RETURN(rc);
2009
2010 repeat:
2011         ++loop;
2012         LASSERT(loop <= 2);
2013         LASSERT(op_data->op_namelen != 0);
2014
2015         CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
2016                PFID(&op_data->op_fid2), op_data->op_namelen,
2017                op_data->op_name, PFID(&op_data->op_fid1));
2018
2019         obj = lmv_object_find(obd, &op_data->op_fid2);
2020         if (obj) {
2021                 sidx = raw_name2idx(obj->lo_hashtype,
2022                                     obj->lo_objcount,
2023                                     op_data->op_name,
2024                                     op_data->op_namelen);
2025                 op_data->op_fid2 = obj->lo_stripes[sidx].ls_fid;
2026                 mds = obj->lo_stripes[sidx].ls_mds;
2027                 lmv_object_put(obj);
2028         } else {
2029                 rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds);
2030                 if (rc)
2031                         RETURN(rc);
2032         }
2033
2034         CDEBUG(D_INODE, "Forward to mds #%x ("DFID")\n",
2035                mds, PFID(&op_data->op_fid1));
2036
2037         op_data->op_fsuid = cfs_curproc_fsuid();
2038         op_data->op_fsgid = cfs_curproc_fsgid();
2039         op_data->op_cap = cfs_curproc_cap_pack();
2040         tgt = lmv_get_target(lmv, mds);
2041
2042         /*
2043          * Cancel UPDATE lock on child (fid1).
2044          */
2045         op_data->op_flags |= MF_MDC_CANCEL_FID2;
2046         rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2047                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2048         if (rc == 0)
2049                 rc = md_link(tgt->ltd_exp, op_data, request);
2050         if (rc == -ERESTART) {
2051                 LASSERT(*request != NULL);
2052                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2053                           "Got -ERESTART during link!\n");
2054                 ptlrpc_req_finished(*request);
2055                 *request = NULL;
2056
2057                 /*
2058                  * Directory got split. Time to update local object and repeat
2059                  * the request with proper MDS.
2060                  */
2061                 rc = lmv_handle_split(exp, &op_data->op_fid2);
2062                 if (rc == 0)
2063                         goto repeat;
2064         }
2065
2066         RETURN(rc);
2067 }
2068
2069 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
2070                       const char *old, int oldlen, const char *new, int newlen,
2071                       struct ptlrpc_request **request)
2072 {
2073         struct obd_device       *obd = exp->exp_obd;
2074         struct lmv_obd          *lmv = &obd->u.lmv;
2075         struct lmv_tgt_desc     *src_tgt;
2076         int                      rc;
2077         int                      sidx;
2078         int                      loop = 0;
2079         struct lmv_object       *obj;
2080         mdsno_t                  mds1;
2081         mdsno_t                  mds2;
2082         ENTRY;
2083
2084         LASSERT(oldlen != 0);
2085
2086         CDEBUG(D_INODE, "RENAME %*s in "DFID" to %*s in "DFID"\n",
2087                oldlen, old, PFID(&op_data->op_fid1),
2088                newlen, new, PFID(&op_data->op_fid2));
2089
2090         rc = lmv_check_connect(obd);
2091         if (rc)
2092                 RETURN(rc);
2093
2094 repeat:
2095         ++loop;
2096         LASSERT(loop <= 2);
2097         obj = lmv_object_find(obd, &op_data->op_fid1);
2098         if (obj) {
2099                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
2100                                     (char *)old, oldlen);
2101                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2102                 mds1 = obj->lo_stripes[sidx].ls_mds;
2103                 CDEBUG(D_INODE, "Parent obj "DFID"\n", PFID(&op_data->op_fid1));
2104                 lmv_object_put(obj);
2105         } else {
2106                 rc = lmv_fld_lookup(lmv, &op_data->op_fid1, &mds1);
2107                 if (rc)
2108                         RETURN(rc);
2109         }
2110
2111         obj = lmv_object_find(obd, &op_data->op_fid2);
2112         if (obj) {
2113                 /*
2114                  * Directory is already split, so we have to forward request to
2115                  * the right MDS.
2116                  */
2117                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
2118                                        (char *)new, newlen);
2119
2120                 mds2 = obj->lo_stripes[sidx].ls_mds;
2121                 op_data->op_fid2 = obj->lo_stripes[sidx].ls_fid;
2122                 CDEBUG(D_INODE, "Parent obj "DFID"\n", PFID(&op_data->op_fid2));
2123                 lmv_object_put(obj);
2124         } else {
2125                 rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds2);
2126                 if (rc)
2127                         RETURN(rc);
2128         }
2129
2130         op_data->op_fsuid = cfs_curproc_fsuid();
2131         op_data->op_fsgid = cfs_curproc_fsgid();
2132         op_data->op_cap = cfs_curproc_cap_pack();
2133
2134         src_tgt = lmv_get_target(lmv, mds1);
2135
2136         /*
2137          * LOOKUP lock on src child (fid3) should also be cancelled for
2138          * src_tgt in mdc_rename.
2139          */
2140         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2141
2142         /*
2143          * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
2144          * own target.
2145          */
2146         rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2147                               LCK_EX, MDS_INODELOCK_UPDATE,
2148                               MF_MDC_CANCEL_FID2);
2149
2150         /*
2151          * Cancel LOOKUP locks on tgt child (fid4) for parent tgt_tgt.
2152          */
2153         if (rc == 0) {
2154                 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2155                                       LCK_EX, MDS_INODELOCK_LOOKUP,
2156                                       MF_MDC_CANCEL_FID4);
2157         }
2158
2159         /*
2160          * Cancel all the locks on tgt child (fid4).
2161          */
2162         if (rc == 0)
2163                 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2164                                       LCK_EX, MDS_INODELOCK_FULL,
2165                                       MF_MDC_CANCEL_FID4);
2166
2167         if (rc == 0)
2168                 rc = md_rename(src_tgt->ltd_exp, op_data, old, oldlen,
2169                                new, newlen, request);
2170
2171         if (rc == -ERESTART) {
2172                 LASSERT(*request != NULL);
2173                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2174                           "Got -ERESTART during rename!\n");
2175                 ptlrpc_req_finished(*request);
2176                 *request = NULL;
2177
2178                 /*
2179                  * Directory got split. Time to update local object and repeat
2180                  * the request with proper MDS.
2181                  */
2182                 rc = lmv_handle_split(exp, &op_data->op_fid1);
2183                 if (rc == 0)
2184                         goto repeat;
2185         }
2186         RETURN(rc);
2187 }
2188
2189 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2190                        void *ea, int ealen, void *ea2, int ea2len,
2191                        struct ptlrpc_request **request,
2192                        struct md_open_data **mod)
2193 {
2194         struct obd_device       *obd = exp->exp_obd;
2195         struct lmv_obd          *lmv = &obd->u.lmv;
2196         struct ptlrpc_request   *req;
2197         struct lmv_tgt_desc     *tgt;
2198         struct lmv_object       *obj;
2199         int                      rc = 0;
2200         int                      i;
2201         ENTRY;
2202
2203         rc = lmv_check_connect(obd);
2204         if (rc)
2205                 RETURN(rc);
2206
2207         obj = lmv_object_find(obd, &op_data->op_fid1);
2208
2209         CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x%s\n",
2210                PFID(&op_data->op_fid1), op_data->op_attr.ia_valid,
2211                obj ? ", split" : "");
2212
2213         op_data->op_flags |= MF_MDC_CANCEL_FID1;
2214         if (obj) {
2215                 for (i = 0; i < obj->lo_objcount; i++) {
2216                         op_data->op_fid1 = obj->lo_stripes[i].ls_fid;
2217
2218                         tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
2219                         if (IS_ERR(tgt)) {
2220                                 rc = PTR_ERR(tgt);
2221                                 break;
2222                         }
2223
2224                         rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen,
2225                                         ea2, ea2len, &req, mod);
2226
2227                         if (lu_fid_eq(&obj->lo_fid, &obj->lo_stripes[i].ls_fid)) {
2228                                 /*
2229                                  * This is master object and this request should
2230                                  * be returned back to llite.
2231                                  */
2232                                 *request = req;
2233                         } else {
2234                                 ptlrpc_req_finished(req);
2235                         }
2236
2237                         if (rc)
2238                                 break;
2239                 }
2240                 lmv_object_put(obj);
2241         } else {
2242                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2243                 if (IS_ERR(tgt))
2244                         RETURN(PTR_ERR(tgt));
2245
2246                 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, ea2,
2247                                 ea2len, request, mod);
2248         }
2249         RETURN(rc);
2250 }
2251
2252 static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
2253                     struct obd_capa *oc, struct ptlrpc_request **request)
2254 {
2255         struct obd_device         *obd = exp->exp_obd;
2256         struct lmv_obd            *lmv = &obd->u.lmv;
2257         struct lmv_tgt_desc       *tgt;
2258         int                        rc;
2259         ENTRY;
2260
2261         rc = lmv_check_connect(obd);
2262         if (rc)
2263                 RETURN(rc);
2264
2265         tgt = lmv_find_target(lmv, fid);
2266         if (IS_ERR(tgt))
2267                 RETURN(PTR_ERR(tgt));
2268
2269         rc = md_sync(tgt->ltd_exp, fid, oc, request);
2270         RETURN(rc);
2271 }
2272
2273 /**
2274  * Main purpose of LMV blocking ast is to remove split directory LMV
2275  * presentation object (struct lmv_object) attached to the lock being revoked.
2276  */
2277 int lmv_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
2278                      void *data, int flag)
2279 {
2280         struct lustre_handle    lockh;
2281         struct lmv_object      *obj;
2282         int                     rc;
2283         ENTRY;
2284
2285         switch (flag) {
2286         case LDLM_CB_BLOCKING:
2287                 ldlm_lock2handle(lock, &lockh);
2288                 rc = ldlm_cli_cancel(&lockh);
2289                 if (rc < 0) {
2290                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
2291                         RETURN(rc);
2292                 }
2293                 break;
2294         case LDLM_CB_CANCELING:
2295                 /*
2296                  * Time to drop cached attrs for split directory object
2297                  */
2298                 obj = lock->l_ast_data;
2299                 if (obj) {
2300                         CDEBUG(D_INODE, "Cancel %s on "LPU64"/"LPU64
2301                                ", master "DFID"\n",
2302                                lock->l_resource->lr_name.name[3] == 1 ?
2303                                "LOOKUP" : "UPDATE",
2304                                lock->l_resource->lr_name.name[0],
2305                                lock->l_resource->lr_name.name[1],
2306                                PFID(&obj->lo_fid));
2307                         lmv_object_put(obj);
2308                 }
2309                 break;
2310         default:
2311                 LBUG();
2312         }
2313         RETURN(0);
2314 }
2315
2316 static void lmv_hash_adjust(__u64 *hash, __u64 hash_adj)
2317 {
2318         __u64         val;
2319
2320         val = le64_to_cpu(*hash);
2321         if (val < hash_adj)
2322                 val += MAX_HASH_SIZE;
2323         if (val != MDS_DIR_END_OFF)
2324                 *hash = cpu_to_le64(val - hash_adj);
2325 }
2326
2327 static __u32 lmv_node_rank(struct obd_export *exp, const struct lu_fid *fid)
2328 {
2329         __u64              id;
2330         struct obd_import *imp;
2331
2332         /*
2333          * XXX: to get nid we assume that underlying obd device is mdc.
2334          */
2335         imp  = class_exp2cliimp(exp);
2336         id   = imp->imp_connection->c_self + fid_flatten(fid);
2337
2338         CDEBUG(D_INODE, "Readpage node rank: "LPX64" "DFID" "LPX64" "LPX64"\n",
2339                imp->imp_connection->c_self, PFID(fid), id, id ^ (id >> 32));
2340
2341         return id ^ (id >> 32);
2342 }
2343
2344 static int lmv_readpage(struct obd_export *exp, struct md_op_data *op_data,
2345                         struct page **pages, struct ptlrpc_request **request)
2346 {
2347         struct obd_device       *obd = exp->exp_obd;
2348         struct lmv_obd          *lmv = &obd->u.lmv;
2349         struct lmv_object       *obj;
2350         struct lu_fid            rid = op_data->op_fid1;
2351         __u64                    offset = op_data->op_offset;
2352         __u64                    hash_adj = 0;
2353         __u32                    rank = 0;
2354         __u64                    seg_size = 0;
2355         __u64                    tgt_tmp = 0;
2356         int                      tgt_idx = 0;
2357         int                      tgt0_idx = 0;
2358         int                      rc;
2359         int                      nr = 0;
2360         int                      i;
2361         /* number of pages read, in CFS_PAGE_SIZE */
2362         int                      nrdpgs;
2363         /* number of pages transferred in LU_PAGE_SIZE */
2364         int                      nlupgs;
2365         struct lmv_stripe       *los;
2366         struct lmv_tgt_desc     *tgt;
2367         struct lu_dirpage       *dp;
2368         struct lu_dirent        *ent;
2369         ENTRY;
2370
2371         rc = lmv_check_connect(obd);
2372         if (rc)
2373                 RETURN(rc);
2374
2375         CDEBUG(D_INODE, "READPAGE at "LPX64" from "DFID"\n", offset, PFID(&rid));
2376
2377         /*
2378          * This case handle directory lookup in clustered metadata case (i.e.
2379          * split directory is located on multiple md servers.)
2380          * each server keeps directory entries for certain range of hashes.
2381          * E.g. we have N server and suppose hash range is 0 to MAX_HASH.
2382          * first server will keep records with hashes [ 0 ... MAX_HASH / N  - 1],
2383          * second one with hashes [MAX_HASH / N ... 2 * MAX_HASH / N] and
2384          * so on....
2385          *      readdir can simply start reading entries from 0 - N server in
2386          * order but that will not scale well as all client will request dir in
2387          * to server in same order.
2388          * Following algorithm does optimization:
2389          * Instead of doing readdir in 1, 2, ...., N order, client with a
2390          * rank R does readdir in R, R + 1, ..., N, 1, ... R - 1 order.
2391          * (every client has rank R)
2392          *      But ll_readdir() expect offset range [0 to MAX_HASH/N) but
2393          * since client ask dir from MDS{R} client has pages with offsets
2394          * [R*MAX_HASH/N ... (R + 1)*MAX_HASH/N] there for we do hash_adj
2395          * on hash  values that we get.
2396          */
2397         obj = lmv_object_find_lock(obd, &rid);
2398         if (obj) {
2399                 nr       = obj->lo_objcount;
2400                 LASSERT(nr > 0);
2401                 seg_size = MAX_HASH_SIZE;
2402                 do_div(seg_size, nr);
2403                 los      = obj->lo_stripes;
2404                 tgt      = lmv_get_target(lmv, los[0].ls_mds);
2405                 rank     = lmv_node_rank(tgt->ltd_exp, &rid) % nr;
2406                 tgt_tmp  = offset;
2407                 do_div(tgt_tmp, seg_size);
2408                 tgt0_idx = do_div(tgt_tmp,  nr);
2409                 tgt_idx  = (tgt0_idx + rank) % nr;
2410
2411                 if (tgt_idx < tgt0_idx)
2412                         /*
2413                          * Wrap around.
2414                          *
2415                          * Last segment has unusual length due to division
2416                          * rounding.
2417                          */
2418                         hash_adj = MAX_HASH_SIZE - seg_size * nr;
2419                 else
2420                         hash_adj = 0;
2421
2422                 hash_adj += rank * seg_size;
2423
2424                 CDEBUG(D_INODE, "Readpage hash adjustment: %x "LPX64" "
2425                        LPX64"/%x -> "LPX64"/%x\n", rank, hash_adj,
2426                        offset, tgt0_idx, offset + hash_adj, tgt_idx);
2427
2428                 offset = (offset + hash_adj) & MAX_HASH_SIZE;
2429                 rid = obj->lo_stripes[tgt_idx].ls_fid;
2430                 tgt = lmv_get_target(lmv, los[tgt_idx].ls_mds);
2431
2432                 CDEBUG(D_INODE, "Forward to "DFID" with offset %lu i %d\n",
2433                        PFID(&rid), (unsigned long)offset, tgt_idx);
2434         } else
2435                 tgt = lmv_find_target(lmv, &rid);
2436
2437         if (IS_ERR(tgt))
2438                 GOTO(cleanup, rc = PTR_ERR(tgt));
2439
2440         op_data->op_fid1 = rid;
2441         rc = md_readpage(tgt->ltd_exp, op_data, pages, request);
2442         if (rc)
2443                 GOTO(cleanup, rc);
2444
2445         nrdpgs = ((*request)->rq_bulk->bd_nob_transferred + CFS_PAGE_SIZE - 1)
2446                  >> CFS_PAGE_SHIFT;
2447         nlupgs = (*request)->rq_bulk->bd_nob_transferred >> LU_PAGE_SHIFT;
2448         LASSERT(!((*request)->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
2449         LASSERT(nrdpgs > 0 && nrdpgs <= op_data->op_npages);
2450
2451         CDEBUG(D_INODE, "read %d(%d)/%d pages\n", nrdpgs, nlupgs,
2452                op_data->op_npages);
2453
2454         for (i = 0; i < nrdpgs; i++) {
2455 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
2456                 struct lu_dirpage *first;
2457                 __u64 hash_end = 0;
2458                 __u32 flags = 0;
2459 #endif
2460                 struct lu_dirent *tmp = NULL;
2461
2462                 dp = cfs_kmap(pages[i]);
2463                 if (obj) {
2464                         lmv_hash_adjust(&dp->ldp_hash_start, hash_adj);
2465                         lmv_hash_adjust(&dp->ldp_hash_end,   hash_adj);
2466                         LASSERT(le64_to_cpu(dp->ldp_hash_start) <=
2467                                 op_data->op_offset);
2468
2469                         if ((tgt0_idx != nr - 1) &&
2470                             (le64_to_cpu(dp->ldp_hash_end) == MDS_DIR_END_OFF))
2471                         {
2472                                 dp->ldp_hash_end = cpu_to_le32(seg_size *
2473                                                                (tgt0_idx + 1));
2474                                 CDEBUG(D_INODE,
2475                                        ""DFID" reset end "LPX64" tgt %d\n",
2476                                        PFID(&rid),
2477                                        (__u64)le64_to_cpu(dp->ldp_hash_end),
2478                                        tgt_idx);
2479                         }
2480                 }
2481
2482                 ent = lu_dirent_start(dp);
2483 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
2484                 first = dp;
2485                 hash_end = dp->ldp_hash_end;
2486 repeat:
2487 #endif
2488                 nlupgs--;
2489                 for (tmp = ent; ent != NULL;
2490                      tmp = ent, ent = lu_dirent_next(ent)) {
2491                         if (obj)
2492                                 lmv_hash_adjust(&ent->lde_hash, hash_adj);
2493                 }
2494
2495 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
2496                 dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
2497                 if (((unsigned long)dp & ~CFS_PAGE_MASK) && nlupgs > 0) {
2498                         ent = lu_dirent_start(dp);
2499
2500                         if (obj) {
2501                                 lmv_hash_adjust(&dp->ldp_hash_end, hash_adj);
2502                                 if ((tgt0_idx != nr - 1) &&
2503                                     (le64_to_cpu(dp->ldp_hash_end) ==
2504                                      MDS_DIR_END_OFF)) {
2505                                         hash_end = cpu_to_le32(seg_size *
2506                                                                (tgt0_idx + 1));
2507                                         CDEBUG(D_INODE,
2508                                             ""DFID" reset end "LPX64" tgt %d\n",
2509                                             PFID(&rid),
2510                                             (__u64)le64_to_cpu(hash_end),
2511                                             tgt_idx);
2512                                 }
2513                         }
2514                         hash_end = dp->ldp_hash_end;
2515                         flags = dp->ldp_flags;
2516
2517                         if (tmp) {
2518                                 /* enlarge the end entry lde_reclen from 0 to
2519                                  * first entry of next lu_dirpage, in this way
2520                                  * several lu_dirpages can be stored into one
2521                                  * client page on client. */
2522                                 tmp = ((void *)tmp) +
2523                                       le16_to_cpu(tmp->lde_reclen);
2524                                 tmp->lde_reclen =
2525                                         cpu_to_le16((char *)(dp->ldp_entries) -
2526                                                     (char *)tmp);
2527                                 goto repeat;
2528                         }
2529                 }
2530                 first->ldp_hash_end = hash_end;
2531                 first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
2532                 first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
2533 #else
2534                 SET_BUT_UNUSED(tmp);
2535 #endif
2536                 cfs_kunmap(pages[i]);
2537         }
2538         EXIT;
2539 cleanup:
2540         if (obj)
2541                 lmv_object_put_unlock(obj);
2542         return rc;
2543 }
2544
2545 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2546                       struct ptlrpc_request **request)
2547 {
2548         struct obd_device       *obd = exp->exp_obd;
2549         struct lmv_obd          *lmv = &obd->u.lmv;
2550         struct lmv_tgt_desc     *tgt = NULL;
2551         struct lmv_object       *obj;
2552         int                      rc;
2553         int                      sidx;
2554         int                      loop = 0;
2555         ENTRY;
2556
2557         rc = lmv_check_connect(obd);
2558         if (rc)
2559                 RETURN(rc);
2560
2561 repeat:
2562         ++loop;
2563         LASSERT(loop <= 2);
2564         LASSERT(op_data->op_namelen != 0);
2565
2566         obj = lmv_object_find(obd, &op_data->op_fid1);
2567         if (obj) {
2568                 sidx = raw_name2idx(obj->lo_hashtype,
2569                                     obj->lo_objcount,
2570                                     op_data->op_name,
2571                                     op_data->op_namelen);
2572                 op_data->op_bias &= ~MDS_CHECK_SPLIT;
2573                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2574                 tgt = lmv_get_target(lmv,
2575                                      obj->lo_stripes[sidx].ls_mds);
2576                 lmv_object_put(obj);
2577                 CDEBUG(D_INODE, "UNLINK '%*s' in "DFID" -> %u\n",
2578                        op_data->op_namelen, op_data->op_name,
2579                        PFID(&op_data->op_fid1), sidx);
2580         }
2581
2582         if (tgt == NULL) {
2583                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2584                 if (IS_ERR(tgt))
2585                         RETURN(PTR_ERR(tgt));
2586                 op_data->op_bias |= MDS_CHECK_SPLIT;
2587         }
2588
2589         op_data->op_fsuid = cfs_curproc_fsuid();
2590         op_data->op_fsgid = cfs_curproc_fsgid();
2591         op_data->op_cap = cfs_curproc_cap_pack();
2592
2593         /*
2594          * If child's fid is given, cancel unused locks for it if it is from
2595          * another export than parent.
2596          *
2597          * LOOKUP lock for child (fid3) should also be cancelled on parent
2598          * tgt_tgt in mdc_unlink().
2599          */
2600         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2601
2602         /*
2603          * Cancel FULL locks on child (fid3).
2604          */
2605         rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2606                               MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2607
2608         if (rc == 0)
2609                 rc = md_unlink(tgt->ltd_exp, op_data, request);
2610
2611         if (rc == -ERESTART) {
2612                 LASSERT(*request != NULL);
2613                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2614                           "Got -ERESTART during unlink!\n");
2615                 ptlrpc_req_finished(*request);
2616                 *request = NULL;
2617
2618                 /*
2619                  * Directory got split. Time to update local object and repeat
2620                  * the request with proper MDS.
2621                  */
2622                 rc = lmv_handle_split(exp, &op_data->op_fid1);
2623                 if (rc == 0)
2624                         goto repeat;
2625         }
2626         RETURN(rc);
2627 }
2628
2629 static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2630 {
2631         struct lmv_obd *lmv = &obd->u.lmv;
2632         int rc = 0;
2633
2634         switch (stage) {
2635         case OBD_CLEANUP_EARLY:
2636                 /* XXX: here should be calling obd_precleanup() down to
2637                  * stack. */
2638                 break;
2639         case OBD_CLEANUP_EXPORTS:
2640                 fld_client_proc_fini(&lmv->lmv_fld);
2641                 lprocfs_obd_cleanup(obd);
2642                 rc = obd_llog_finish(obd, 0);
2643                 if (rc != 0)
2644                         CERROR("failed to cleanup llogging subsystems\n");
2645                 break;
2646         default:
2647                 break;
2648         }
2649         RETURN(rc);
2650 }
2651
2652 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
2653                         void *key, __u32 *vallen, void *val,
2654                         struct lov_stripe_md *lsm)
2655 {
2656         struct obd_device       *obd;
2657         struct lmv_obd          *lmv;
2658         int                      rc = 0;
2659         ENTRY;
2660
2661         obd = class_exp2obd(exp);
2662         if (obd == NULL) {
2663                 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2664                        exp->exp_handle.h_cookie);
2665                 RETURN(-EINVAL);
2666         }
2667
2668         lmv = &obd->u.lmv;
2669         if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2670                 struct lmv_tgt_desc *tgts;
2671                 int i;
2672
2673                 rc = lmv_check_connect(obd);
2674                 if (rc)
2675                         RETURN(rc);
2676
2677                 LASSERT(*vallen == sizeof(__u32));
2678                 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count;
2679                      i++, tgts++) {
2680
2681                         /*
2682                          * All tgts should be connected when this gets called.
2683                          */
2684                         if (!tgts || !tgts->ltd_exp) {
2685                                 CERROR("target not setup?\n");
2686                                 continue;
2687                         }
2688
2689                         if (!obd_get_info(tgts->ltd_exp, keylen, key,
2690                                           vallen, val, NULL))
2691                                 RETURN(0);
2692                 }
2693                 RETURN(-EINVAL);
2694         } else if (KEY_IS(KEY_MAX_EASIZE) || KEY_IS(KEY_CONN_DATA)) {
2695                 rc = lmv_check_connect(obd);
2696                 if (rc)
2697                         RETURN(rc);
2698
2699                 /*
2700                  * Forwarding this request to first MDS, it should know LOV
2701                  * desc.
2702                  */
2703                 rc = obd_get_info(lmv->tgts[0].ltd_exp, keylen, key,
2704                                   vallen, val, NULL);
2705                 if (!rc && KEY_IS(KEY_CONN_DATA)) {
2706                         exp->exp_connect_flags =
2707                         ((struct obd_connect_data *)val)->ocd_connect_flags;
2708                 }
2709                 RETURN(rc);
2710         } else if (KEY_IS(KEY_TGT_COUNT)) {
2711                 *((int *)val) = lmv->desc.ld_tgt_count;
2712                 RETURN(0);
2713         }
2714
2715         CDEBUG(D_IOCTL, "Invalid key\n");
2716         RETURN(-EINVAL);
2717 }
2718
2719 int lmv_set_info_async(struct obd_export *exp, obd_count keylen,
2720                        void *key, obd_count vallen, void *val,
2721                        struct ptlrpc_request_set *set)
2722 {
2723         struct lmv_tgt_desc    *tgt;
2724         struct obd_device      *obd;
2725         struct lmv_obd         *lmv;
2726         int rc = 0;
2727         ENTRY;
2728
2729         obd = class_exp2obd(exp);
2730         if (obd == NULL) {
2731                 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2732                        exp->exp_handle.h_cookie);
2733                 RETURN(-EINVAL);
2734         }
2735         lmv = &obd->u.lmv;
2736
2737         if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX)) {
2738                 int i, err = 0;
2739
2740                 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2741                         tgt = &lmv->tgts[i];
2742
2743                         if (!tgt->ltd_exp)
2744                                 continue;
2745
2746                         err = obd_set_info_async(tgt->ltd_exp,
2747                                                  keylen, key, vallen, val, set);
2748                         if (err && rc == 0)
2749                                 rc = err;
2750                 }
2751
2752                 RETURN(rc);
2753         }
2754
2755         RETURN(-EINVAL);
2756 }
2757
2758 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
2759                struct lov_stripe_md *lsm)
2760 {
2761         struct obd_device         *obd = class_exp2obd(exp);
2762         struct lmv_obd            *lmv = &obd->u.lmv;
2763         struct lmv_stripe_md      *meap;
2764         struct lmv_stripe_md      *lsmp;
2765         int                        mea_size;
2766         int                        i;
2767         ENTRY;
2768
2769         mea_size = lmv_get_easize(lmv);
2770         if (!lmmp)
2771                 RETURN(mea_size);
2772
2773         if (*lmmp && !lsm) {
2774                 OBD_FREE_LARGE(*lmmp, mea_size);
2775                 *lmmp = NULL;
2776                 RETURN(0);
2777         }
2778
2779         if (*lmmp == NULL) {
2780                 OBD_ALLOC_LARGE(*lmmp, mea_size);
2781                 if (*lmmp == NULL)
2782                         RETURN(-ENOMEM);
2783         }
2784
2785         if (!lsm)
2786                 RETURN(mea_size);
2787
2788         lsmp = (struct lmv_stripe_md *)lsm;
2789         meap = (struct lmv_stripe_md *)*lmmp;
2790
2791         if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
2792             lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
2793                 RETURN(-EINVAL);
2794
2795         meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
2796         meap->mea_count = cpu_to_le32(lsmp->mea_count);
2797         meap->mea_master = cpu_to_le32(lsmp->mea_master);
2798
2799         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2800                 meap->mea_ids[i] = meap->mea_ids[i];
2801                 fid_cpu_to_le(&meap->mea_ids[i], &meap->mea_ids[i]);
2802         }
2803
2804         RETURN(mea_size);
2805 }
2806
2807 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
2808                  struct lov_mds_md *lmm, int lmm_size)
2809 {
2810         struct obd_device          *obd = class_exp2obd(exp);
2811         struct lmv_stripe_md      **tmea = (struct lmv_stripe_md **)lsmp;
2812         struct lmv_stripe_md       *mea = (struct lmv_stripe_md *)lmm;
2813         struct lmv_obd             *lmv = &obd->u.lmv;
2814         int                         mea_size;
2815         int                         i;
2816         __u32                       magic;
2817         ENTRY;
2818
2819         mea_size = lmv_get_easize(lmv);
2820         if (lsmp == NULL)
2821                 return mea_size;
2822
2823         if (*lsmp != NULL && lmm == NULL) {
2824                 OBD_FREE_LARGE(*tmea, mea_size);
2825                 *lsmp = NULL;
2826                 RETURN(0);
2827         }
2828
2829         LASSERT(mea_size == lmm_size);
2830
2831         OBD_ALLOC_LARGE(*tmea, mea_size);
2832         if (*tmea == NULL)
2833                 RETURN(-ENOMEM);
2834
2835         if (!lmm)
2836                 RETURN(mea_size);
2837
2838         if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
2839             mea->mea_magic == MEA_MAGIC_ALL_CHARS ||
2840             mea->mea_magic == MEA_MAGIC_HASH_SEGMENT)
2841         {
2842                 magic = le32_to_cpu(mea->mea_magic);
2843         } else {
2844                 /*
2845                  * Old mea is not handled here.
2846                  */
2847                 CERROR("Old not supportable EA is found\n");
2848                 LBUG();
2849         }
2850
2851         (*tmea)->mea_magic = magic;
2852         (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
2853         (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
2854
2855         for (i = 0; i < (*tmea)->mea_count; i++) {
2856                 (*tmea)->mea_ids[i] = mea->mea_ids[i];
2857                 fid_le_to_cpu(&(*tmea)->mea_ids[i], &(*tmea)->mea_ids[i]);
2858         }
2859         RETURN(mea_size);
2860 }
2861
2862 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
2863                              ldlm_policy_data_t *policy, ldlm_mode_t mode,
2864                              ldlm_cancel_flags_t flags, void *opaque)
2865 {
2866         struct obd_device       *obd = exp->exp_obd;
2867         struct lmv_obd          *lmv = &obd->u.lmv;
2868         int                      rc = 0;
2869         int                      err;
2870         int                      i;
2871         ENTRY;
2872
2873         LASSERT(fid != NULL);
2874
2875         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2876                 if (!lmv->tgts[i].ltd_exp || !lmv->tgts[i].ltd_active)
2877                         continue;
2878
2879                 err = md_cancel_unused(lmv->tgts[i].ltd_exp, fid,
2880                                        policy, mode, flags, opaque);
2881                 if (!rc)
2882                         rc = err;
2883         }
2884         RETURN(rc);
2885 }
2886
2887 int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
2888                       __u64 *bits)
2889 {
2890         struct obd_device       *obd = exp->exp_obd;
2891         struct lmv_obd          *lmv = &obd->u.lmv;
2892         int                      rc;
2893         ENTRY;
2894
2895         rc =  md_set_lock_data(lmv->tgts[0].ltd_exp, lockh, data, bits);
2896         RETURN(rc);
2897 }
2898
2899 ldlm_mode_t lmv_lock_match(struct obd_export *exp, int flags,
2900                            const struct lu_fid *fid, ldlm_type_t type,
2901                            ldlm_policy_data_t *policy, ldlm_mode_t mode,
2902                            struct lustre_handle *lockh)
2903 {
2904         struct obd_device       *obd = exp->exp_obd;
2905         struct lmv_obd          *lmv = &obd->u.lmv;
2906         ldlm_mode_t              rc;
2907         int                      i;
2908         ENTRY;
2909
2910         CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
2911
2912         /*
2913          * With CMD every object can have two locks in different namespaces:
2914          * lookup lock in space of mds storing direntry and update/open lock in
2915          * space of mds storing inode. Thus we check all targets, not only that
2916          * one fid was created in.
2917          */
2918         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2919                 rc = md_lock_match(lmv->tgts[i].ltd_exp, flags, fid,
2920                                    type, policy, mode, lockh);
2921                 if (rc)
2922                         RETURN(rc);
2923         }
2924
2925         RETURN(0);
2926 }
2927
2928 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
2929                       struct obd_export *dt_exp, struct obd_export *md_exp,
2930                       struct lustre_md *md)
2931 {
2932         struct obd_device       *obd = exp->exp_obd;
2933         struct lmv_obd          *lmv = &obd->u.lmv;
2934         int                      rc;
2935         ENTRY;
2936         rc = md_get_lustre_md(lmv->tgts[0].ltd_exp, req, dt_exp, md_exp, md);
2937         RETURN(rc);
2938 }
2939
2940 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
2941 {
2942         struct obd_device       *obd = exp->exp_obd;
2943         struct lmv_obd          *lmv = &obd->u.lmv;
2944         ENTRY;
2945
2946         if (md->mea)
2947                 obd_free_memmd(exp, (void *)&md->mea);
2948         RETURN(md_free_lustre_md(lmv->tgts[0].ltd_exp, md));
2949 }
2950
2951 int lmv_set_open_replay_data(struct obd_export *exp,
2952                              struct obd_client_handle *och,
2953                              struct ptlrpc_request *open_req)
2954 {
2955         struct obd_device       *obd = exp->exp_obd;
2956         struct lmv_obd          *lmv = &obd->u.lmv;
2957         struct lmv_tgt_desc     *tgt;
2958         ENTRY;
2959
2960         tgt = lmv_find_target(lmv, &och->och_fid);
2961         if (IS_ERR(tgt))
2962                 RETURN(PTR_ERR(tgt));
2963
2964         RETURN(md_set_open_replay_data(tgt->ltd_exp, och, open_req));
2965 }
2966
2967 int lmv_clear_open_replay_data(struct obd_export *exp,
2968                                struct obd_client_handle *och)
2969 {
2970         struct obd_device       *obd = exp->exp_obd;
2971         struct lmv_obd          *lmv = &obd->u.lmv;
2972         struct lmv_tgt_desc     *tgt;
2973         ENTRY;
2974
2975         tgt = lmv_find_target(lmv, &och->och_fid);
2976         if (IS_ERR(tgt))
2977                 RETURN(PTR_ERR(tgt));
2978
2979         RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
2980 }
2981
2982 static int lmv_get_remote_perm(struct obd_export *exp,
2983                                const struct lu_fid *fid,
2984                                struct obd_capa *oc, __u32 suppgid,
2985                                struct ptlrpc_request **request)
2986 {
2987         struct obd_device       *obd = exp->exp_obd;
2988         struct lmv_obd          *lmv = &obd->u.lmv;
2989         struct lmv_tgt_desc     *tgt;
2990         int                      rc;
2991         ENTRY;
2992
2993         rc = lmv_check_connect(obd);
2994         if (rc)
2995                 RETURN(rc);
2996
2997         tgt = lmv_find_target(lmv, fid);
2998         if (IS_ERR(tgt))
2999                 RETURN(PTR_ERR(tgt));
3000
3001         rc = md_get_remote_perm(tgt->ltd_exp, fid, oc, suppgid, request);
3002         RETURN(rc);
3003 }
3004
3005 static int lmv_renew_capa(struct obd_export *exp, struct obd_capa *oc,
3006                           renew_capa_cb_t cb)
3007 {
3008         struct obd_device       *obd = exp->exp_obd;
3009         struct lmv_obd          *lmv = &obd->u.lmv;
3010         struct lmv_tgt_desc     *tgt;
3011         int                      rc;
3012         ENTRY;
3013
3014         rc = lmv_check_connect(obd);
3015         if (rc)
3016                 RETURN(rc);
3017
3018         tgt = lmv_find_target(lmv, &oc->c_capa.lc_fid);
3019         if (IS_ERR(tgt))
3020                 RETURN(PTR_ERR(tgt));
3021
3022         rc = md_renew_capa(tgt->ltd_exp, oc, cb);
3023         RETURN(rc);
3024 }
3025
3026 int lmv_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
3027                     const struct req_msg_field *field, struct obd_capa **oc)
3028 {
3029         struct obd_device *obd = exp->exp_obd;
3030         struct lmv_obd *lmv = &obd->u.lmv;
3031         int rc;
3032
3033         ENTRY;
3034         rc = md_unpack_capa(lmv->tgts[0].ltd_exp, req, field, oc);
3035         RETURN(rc);
3036 }
3037
3038 int lmv_intent_getattr_async(struct obd_export *exp,
3039                              struct md_enqueue_info *minfo,
3040                              struct ldlm_enqueue_info *einfo)
3041 {
3042         struct md_op_data       *op_data = &minfo->mi_data;
3043         struct obd_device       *obd = exp->exp_obd;
3044         struct lmv_obd          *lmv = &obd->u.lmv;
3045         struct lmv_object       *obj;
3046         struct lmv_tgt_desc     *tgt = NULL;
3047         int                      rc;
3048         int                      sidx;
3049         ENTRY;
3050
3051         rc = lmv_check_connect(obd);
3052         if (rc)
3053                 RETURN(rc);
3054
3055         if (op_data->op_namelen) {
3056                 obj = lmv_object_find(obd, &op_data->op_fid1);
3057                 if (obj) {
3058                         sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
3059                                             (char *)op_data->op_name,
3060                                             op_data->op_namelen);
3061                         op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
3062                         tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
3063                         lmv_object_put(obj);
3064                 }
3065         }
3066
3067         if (tgt == NULL)
3068                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
3069
3070         if (IS_ERR(tgt))
3071                 RETURN(PTR_ERR(tgt));
3072
3073         rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
3074         RETURN(rc);
3075 }
3076
3077 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
3078                         struct lu_fid *fid, __u64 *bits)
3079 {
3080         struct obd_device       *obd = exp->exp_obd;
3081         struct lmv_obd          *lmv = &obd->u.lmv;
3082         struct lmv_tgt_desc     *tgt;
3083         int                      rc;
3084         ENTRY;
3085
3086         rc = lmv_check_connect(obd);
3087         if (rc)
3088                 RETURN(rc);
3089
3090         tgt = lmv_find_target(lmv, fid);
3091         if (IS_ERR(tgt))
3092                 RETURN(PTR_ERR(tgt));
3093
3094         rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
3095         RETURN(rc);
3096 }
3097
3098 /**
3099  * For lmv, only need to send request to master MDT, and the master MDT will
3100  * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
3101  * we directly fetch data from the slave MDTs.
3102  */
3103 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
3104                  struct obd_quotactl *oqctl)
3105 {
3106         struct obd_device   *obd = class_exp2obd(exp);
3107         struct lmv_obd      *lmv = &obd->u.lmv;
3108         struct lmv_tgt_desc *tgt = &lmv->tgts[0];
3109         int                  rc = 0, i;
3110         __u64                curspace, curinodes;
3111         ENTRY;
3112
3113         if (!lmv->desc.ld_tgt_count || !tgt->ltd_active) {
3114                 CERROR("master lmv inactive\n");
3115                 RETURN(-EIO);
3116         }
3117
3118         if (oqctl->qc_cmd != Q_GETOQUOTA) {
3119                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
3120                 RETURN(rc);
3121         }
3122
3123         curspace = curinodes = 0;
3124         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3125                 int err;
3126                 tgt = &lmv->tgts[i];
3127
3128                 if (tgt->ltd_exp == NULL)
3129                         continue;
3130                 if (!tgt->ltd_active) {
3131                         CDEBUG(D_HA, "mdt %d is inactive.\n", i);
3132                         continue;
3133                 }
3134
3135                 err = obd_quotactl(tgt->ltd_exp, oqctl);
3136                 if (err) {
3137                         CERROR("getquota on mdt %d failed. %d\n", i, err);
3138                         if (!rc)
3139                                 rc = err;
3140                 } else {
3141                         curspace += oqctl->qc_dqblk.dqb_curspace;
3142                         curinodes += oqctl->qc_dqblk.dqb_curinodes;
3143                 }
3144         }
3145         oqctl->qc_dqblk.dqb_curspace = curspace;
3146         oqctl->qc_dqblk.dqb_curinodes = curinodes;
3147
3148         RETURN(rc);
3149 }
3150
3151 int lmv_quotacheck(struct obd_device *unused, struct obd_export *exp,
3152                    struct obd_quotactl *oqctl)
3153 {
3154         struct obd_device   *obd = class_exp2obd(exp);
3155         struct lmv_obd      *lmv = &obd->u.lmv;
3156         struct lmv_tgt_desc *tgt;
3157         int                  i, rc = 0;
3158         ENTRY;
3159
3160         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
3161                 int err;
3162
3163                 if (!tgt->ltd_active) {
3164                         CERROR("lmv idx %d inactive\n", i);
3165                         RETURN(-EIO);
3166                 }
3167
3168                 err = obd_quotacheck(tgt->ltd_exp, oqctl);
3169                 if (err && !rc)
3170                         rc = err;
3171         }
3172
3173         RETURN(rc);
3174 }
3175
3176 struct obd_ops lmv_obd_ops = {
3177         .o_owner                = THIS_MODULE,
3178         .o_setup                = lmv_setup,
3179         .o_cleanup              = lmv_cleanup,
3180         .o_precleanup           = lmv_precleanup,
3181         .o_process_config       = lmv_process_config,
3182         .o_connect              = lmv_connect,
3183         .o_disconnect           = lmv_disconnect,
3184         .o_statfs               = lmv_statfs,
3185         .o_get_info             = lmv_get_info,
3186         .o_set_info_async       = lmv_set_info_async,
3187         .o_packmd               = lmv_packmd,
3188         .o_unpackmd             = lmv_unpackmd,
3189         .o_notify               = lmv_notify,
3190         .o_get_uuid             = lmv_get_uuid,
3191         .o_iocontrol            = lmv_iocontrol,
3192         .o_fid_delete           = lmv_fid_delete,
3193         .o_quotacheck           = lmv_quotacheck,
3194         .o_quotactl             = lmv_quotactl
3195 };
3196
3197 struct md_ops lmv_md_ops = {
3198         .m_getstatus            = lmv_getstatus,
3199         .m_change_cbdata        = lmv_change_cbdata,
3200         .m_find_cbdata          = lmv_find_cbdata,
3201         .m_close                = lmv_close,
3202         .m_create               = lmv_create,
3203         .m_done_writing         = lmv_done_writing,
3204         .m_enqueue              = lmv_enqueue,
3205         .m_getattr              = lmv_getattr,
3206         .m_getxattr             = lmv_getxattr,
3207         .m_getattr_name         = lmv_getattr_name,
3208         .m_intent_lock          = lmv_intent_lock,
3209         .m_link                 = lmv_link,
3210         .m_rename               = lmv_rename,
3211         .m_setattr              = lmv_setattr,
3212         .m_setxattr             = lmv_setxattr,
3213         .m_sync                 = lmv_sync,
3214         .m_readpage             = lmv_readpage,
3215         .m_unlink               = lmv_unlink,
3216         .m_init_ea_size         = lmv_init_ea_size,
3217         .m_cancel_unused        = lmv_cancel_unused,
3218         .m_set_lock_data        = lmv_set_lock_data,
3219         .m_lock_match           = lmv_lock_match,
3220         .m_get_lustre_md        = lmv_get_lustre_md,
3221         .m_free_lustre_md       = lmv_free_lustre_md,
3222         .m_set_open_replay_data = lmv_set_open_replay_data,
3223         .m_clear_open_replay_data = lmv_clear_open_replay_data,
3224         .m_renew_capa           = lmv_renew_capa,
3225         .m_unpack_capa          = lmv_unpack_capa,
3226         .m_get_remote_perm      = lmv_get_remote_perm,
3227         .m_intent_getattr_async = lmv_intent_getattr_async,
3228         .m_revalidate_lock      = lmv_revalidate_lock
3229 };
3230
3231 int __init lmv_init(void)
3232 {
3233         struct lprocfs_static_vars lvars;
3234         int                        rc;
3235
3236         lmv_object_cache = cfs_mem_cache_create("lmv_objects",
3237                                                 sizeof(struct lmv_object),
3238                                                 0, 0);
3239         if (!lmv_object_cache) {
3240                 CERROR("Error allocating lmv objects cache\n");
3241                 return -ENOMEM;
3242         }
3243
3244         lprocfs_lmv_init_vars(&lvars);
3245
3246         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
3247                                  lvars.module_vars, LUSTRE_LMV_NAME, NULL);
3248         if (rc)
3249                 cfs_mem_cache_destroy(lmv_object_cache);
3250
3251         return rc;
3252 }
3253
3254 #ifdef __KERNEL__
3255 static void lmv_exit(void)
3256 {
3257         class_unregister_type(LUSTRE_LMV_NAME);
3258
3259         LASSERTF(cfs_atomic_read(&lmv_object_count) == 0,
3260                  "Can't free lmv objects cache, %d object(s) busy\n",
3261                  cfs_atomic_read(&lmv_object_count));
3262         cfs_mem_cache_destroy(lmv_object_cache);
3263 }
3264
3265 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3266 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
3267 MODULE_LICENSE("GPL");
3268
3269 module_init(lmv_init);
3270 module_exit(lmv_exit);
3271 #endif