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 /*
  33  * Copyright (c) 2011 Whamcloud, Inc.
  34  */
  35 /*
  36  * This file is part of Lustre, http://www.lustre.org/
  37  * Lustre is a trademark of Sun Microsystems, Inc.
  38  */
  39
  40 #ifndef EXPORT_SYMTAB
  41 # define EXPORT_SYMTAB
  42 #endif
  43 #define DEBUG_SUBSYSTEM S_LMV
  44 #ifdef __KERNEL__
  45 #include <linux/slab.h>
  46 #include <linux/module.h>
  47 #include <linux/init.h>
  48 #include <linux/slab.h>
  49 #include <linux/pagemap.h>
  50 #include <linux/mm.h>
  51 #include <asm/div64.h>
  52 #include <linux/seq_file.h>
  53 #include <linux/namei.h>
  54 #else
  55 #include <liblustre.h>
  56 #endif
  57
  58 #include <lustre_log.h>
  59 #include <obd_support.h>
  60 #include <lustre_lib.h>
  61 #include <lustre_net.h>
  62 #include <obd_class.h>
  63 #include <lprocfs_status.h>
  64 #include <lustre_lite.h>
  65 #include <lustre_fid.h>
  66 #include "lmv_internal.h"
  67
  68 /* object cache. */
  69 cfs_mem_cache_t *lmv_object_cache;
  70 cfs_atomic_t lmv_object_count = CFS_ATOMIC_INIT(0);
  71
  72 static void lmv_activate_target(struct lmv_obd *lmv,
  73                                 struct lmv_tgt_desc *tgt,
  74                                 int activate)
  75 {
  76         if (tgt->ltd_active == activate)
  77                 return;
  78
  79         tgt->ltd_active = activate;
  80         lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
  81 }
  82
  83 /**
  84  * Error codes:
  85  *
  86  *  -EINVAL  : UUID can't be found in the LMV's target list
  87  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
  88  *  -EBADF   : The UUID is found, but the OBD of the wrong type (!)
  89  */
  90 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
  91                               int activate)
  92 {
  93         struct lmv_tgt_desc    *tgt;
  94         struct obd_device      *obd;
  95         int                     i;
  96         int                     rc = 0;
  97         ENTRY;
  98
  99         CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
 100                lmv, uuid->uuid, activate);
 101
 102         cfs_spin_lock(&lmv->lmv_lock);
 103         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 104                 if (tgt->ltd_exp == NULL)
 105                         continue;
 106
 107                 CDEBUG(D_INFO, "Target idx %d is %s conn "LPX64"\n",
 108                        i, tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
 109
 110                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 111                         break;
 112         }
 113
 114         if (i == lmv->desc.ld_tgt_count)
 115                 GOTO(out_lmv_lock, rc = -EINVAL);
 116
 117         obd = class_exp2obd(tgt->ltd_exp);
 118         if (obd == NULL)
 119                 GOTO(out_lmv_lock, rc = -ENOTCONN);
 120
 121         CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
 122                obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
 123                obd->obd_type->typ_name, i);
 124         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
 125
 126         if (tgt->ltd_active == activate) {
 127                 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
 128                        activate ? "" : "in");
 129                 GOTO(out_lmv_lock, rc);
 130         }
 131
 132         CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
 133                activate ? "" : "in");
 134         lmv_activate_target(lmv, tgt, activate);
 135         EXIT;
 136
 137  out_lmv_lock:
 138         cfs_spin_unlock(&lmv->lmv_lock);
 139         return rc;
 140 }
 141
 142 static int lmv_set_mdc_data(struct lmv_obd *lmv, struct obd_uuid *uuid,
 143                             struct obd_connect_data *data)
 144 {
 145         struct lmv_tgt_desc    *tgt;
 146         int                     i;
 147         ENTRY;
 148
 149         LASSERT(data != NULL);
 150
 151         cfs_spin_lock(&lmv->lmv_lock);
 152         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 153                 if (tgt->ltd_exp == NULL)
 154                         continue;
 155
 156                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 157                         lmv->datas[tgt->ltd_idx] = *data;
 158                         break;
 159                 }
 160         }
 161         cfs_spin_unlock(&lmv->lmv_lock);
 162         RETURN(0);
 163 }
 164
 165 struct obd_uuid *lmv_get_uuid(struct obd_export *exp) {
 166         struct obd_device *obd = exp->exp_obd;
 167         struct lmv_obd *lmv = &obd->u.lmv;
 168         return obd_get_uuid(lmv->tgts[0].ltd_exp);
 169 }
 170
 171 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
 172                       enum obd_notify_event ev, void *data)
 173 {
 174         struct obd_connect_data *conn_data;
 175         struct lmv_obd          *lmv = &obd->u.lmv;
 176         struct obd_uuid         *uuid;
 177         int                      rc = 0;
 178         ENTRY;
 179
 180         if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 181                 CERROR("unexpected notification of %s %s!\n",
 182                        watched->obd_type->typ_name,
 183                        watched->obd_name);
 184                 RETURN(-EINVAL);
 185         }
 186
 187         uuid = &watched->u.cli.cl_target_uuid;
 188         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
 189                 /*
 190                  * Set MDC as active before notifying the observer, so the
 191                  * observer can use the MDC normally.
 192                  */
 193                 rc = lmv_set_mdc_active(lmv, uuid,
 194                                         ev == OBD_NOTIFY_ACTIVE);
 195                 if (rc) {
 196                         CERROR("%sactivation of %s failed: %d\n",
 197                                ev == OBD_NOTIFY_ACTIVE ? "" : "de",
 198                                uuid->uuid, rc);
 199                         RETURN(rc);
 200                 }
 201         } else if (ev == OBD_NOTIFY_OCD) {
 202                 conn_data = &watched->u.cli.cl_import->imp_connect_data;
 203
 204                 /*
 205                  * Set connect data to desired target, update exp_connect_flags.
 206                  */
 207                 rc = lmv_set_mdc_data(lmv, uuid, conn_data);
 208                 if (rc) {
 209                         CERROR("can't set connect data to target %s, rc %d\n",
 210                                uuid->uuid, rc);
 211                         RETURN(rc);
 212                 }
 213
 214                 /*
 215                  * XXX: Make sure that ocd_connect_flags from all targets are
 216                  * the same. Otherwise one of MDTs runs wrong version or
 217                  * something like this.  --umka
 218                  */
 219                 obd->obd_self_export->exp_connect_flags =
 220                         conn_data->ocd_connect_flags;
 221         }
 222 #if 0
 223         else if (ev == OBD_NOTIFY_DISCON) {
 224                 /*
 225                  * For disconnect event, flush fld cache for failout MDS case.
 226                  */
 227                 fld_client_flush(&lmv->lmv_fld);
 228         }
 229 #endif
 230         /*
 231          * Pass the notification up the chain.
 232          */
 233         if (obd->obd_observer)
 234                 rc = obd_notify(obd->obd_observer, watched, ev, data);
 235
 236         RETURN(rc);
 237 }
 238
 239 /**
 240  * This is fake connect function. Its purpose is to initialize lmv and say
 241  * caller that everything is okay. Real connection will be performed later.
 242  */
 243 static int lmv_connect(const struct lu_env *env,
 244                        struct obd_export **exp, struct obd_device *obd,
 245                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 246                        void *localdata)
 247 {
 248 #ifdef __KERNEL__
 249         struct proc_dir_entry *lmv_proc_dir;
 250 #endif
 251         struct lmv_obd        *lmv = &obd->u.lmv;
 252         struct lustre_handle  conn = { 0 };
 253         int                    rc = 0;
 254         ENTRY;
 255
 256         /*
 257          * We don't want to actually do the underlying connections more than
 258          * once, so keep track.
 259          */
 260         lmv->refcount++;
 261         if (lmv->refcount > 1) {
 262                 *exp = NULL;
 263                 RETURN(0);
 264         }
 265
 266         rc = class_connect(&conn, obd, cluuid);
 267         if (rc) {
 268                 CERROR("class_connection() returned %d\n", rc);
 269                 RETURN(rc);
 270         }
 271
 272         *exp = class_conn2export(&conn);
 273         class_export_get(*exp);
 274
 275         lmv->exp = *exp;
 276         lmv->connected = 0;
 277         lmv->cluuid = *cluuid;
 278
 279         if (data)
 280                 lmv->conn_data = *data;
 281
 282 #ifdef __KERNEL__
 283         lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
 284                                         NULL, NULL);
 285         if (IS_ERR(lmv_proc_dir)) {
 286                 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
 287                        obd->obd_type->typ_name, obd->obd_name);
 288                 lmv_proc_dir = NULL;
 289         }
 290 #endif
 291
 292         /*
 293          * All real clients should perform actual connection right away, because
 294          * it is possible, that LMV will not have opportunity to connect targets
 295          * and MDC stuff will be called directly, for instance while reading
 296          * ../mdc/../kbytesfree procfs file, etc.
 297          */
 298         if (data->ocd_connect_flags & OBD_CONNECT_REAL)
 299                 rc = lmv_check_connect(obd);
 300
 301 #ifdef __KERNEL__
 302         if (rc) {
 303                 if (lmv_proc_dir)
 304                         lprocfs_remove(&lmv_proc_dir);
 305         }
 306 #endif
 307
 308         RETURN(rc);
 309 }
 310
 311 static void lmv_set_timeouts(struct obd_device *obd)
 312 {
 313         struct lmv_tgt_desc   *tgts;
 314         struct lmv_obd        *lmv;
 315         int                    i;
 316
 317         lmv = &obd->u.lmv;
 318         if (lmv->server_timeout == 0)
 319                 return;
 320
 321         if (lmv->connected == 0)
 322                 return;
 323
 324         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 325                 if (tgts->ltd_exp == NULL)
 326                         continue;
 327
 328                 obd_set_info_async(tgts->ltd_exp, sizeof(KEY_INTERMDS),
 329                                    KEY_INTERMDS, 0, NULL, NULL);
 330         }
 331 }
 332
 333 static int lmv_init_ea_size(struct obd_export *exp, int easize,
 334                             int def_easize, int cookiesize)
 335 {
 336         struct obd_device   *obd = exp->exp_obd;
 337         struct lmv_obd      *lmv = &obd->u.lmv;
 338         int                  i;
 339         int                  rc = 0;
 340         int                  change = 0;
 341         ENTRY;
 342
 343         if (lmv->max_easize < easize) {
 344                 lmv->max_easize = easize;
 345                 change = 1;
 346         }
 347         if (lmv->max_def_easize < def_easize) {
 348                 lmv->max_def_easize = def_easize;
 349                 change = 1;
 350         }
 351         if (lmv->max_cookiesize < cookiesize) {
 352                 lmv->max_cookiesize = cookiesize;
 353                 change = 1;
 354         }
 355         if (change == 0)
 356                 RETURN(0);
 357
 358         if (lmv->connected == 0)
 359                 RETURN(0);
 360
 361         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 362                 if (lmv->tgts[i].ltd_exp == NULL) {
 363                         CWARN("%s: NULL export for %d\n", obd->obd_name, i);
 364                         continue;
 365                 }
 366
 367                 rc = md_init_ea_size(lmv->tgts[i].ltd_exp, easize, def_easize,
 368                                      cookiesize);
 369                 if (rc) {
 370                         CERROR("obd_init_ea_size() failed on MDT target %d, "
 371                                "error %d.\n", i, rc);
 372                         break;
 373                 }
 374         }
 375         RETURN(rc);
 376 }
 377
 378 #define MAX_STRING_SIZE 128
 379
 380 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 381 {
 382 #ifdef __KERNEL__
 383         struct proc_dir_entry   *lmv_proc_dir;
 384 #endif
 385         struct lmv_obd          *lmv = &obd->u.lmv;
 386         struct obd_uuid         *cluuid = &lmv->cluuid;
 387         struct obd_connect_data *mdc_data = NULL;
 388         struct obd_uuid          lmv_mdc_uuid = { "LMV_MDC_UUID" };
 389         struct obd_device       *mdc_obd;
 390         struct obd_export       *mdc_exp;
 391         struct lu_fld_target     target;
 392         int                      rc;
 393         ENTRY;
 394
 395         mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
 396                                         &obd->obd_uuid);
 397         if (!mdc_obd) {
 398                 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
 399                 RETURN(-EINVAL);
 400         }
 401
 402         CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
 403                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 404                 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
 405                 cluuid->uuid);
 406
 407         if (!mdc_obd->obd_set_up) {
 408                 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
 409                 RETURN(-EINVAL);
 410         }
 411
 412         rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
 413                          &lmv->conn_data, NULL);
 414         if (rc) {
 415                 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
 416                 RETURN(rc);
 417         }
 418
 419         /*
 420          * Init fid sequence client for this mdc and add new fld target.
 421          */
 422         rc = obd_fid_init(mdc_exp);
 423         if (rc)
 424                 RETURN(rc);
 425
 426         target.ft_srv = NULL;
 427         target.ft_exp = mdc_exp;
 428         target.ft_idx = tgt->ltd_idx;
 429
 430         fld_client_add_target(&lmv->lmv_fld, &target);
 431
 432         mdc_data = &class_exp2cliimp(mdc_exp)->imp_connect_data;
 433
 434         rc = obd_register_observer(mdc_obd, obd);
 435         if (rc) {
 436                 obd_disconnect(mdc_exp);
 437                 CERROR("target %s register_observer error %d\n",
 438                        tgt->ltd_uuid.uuid, rc);
 439                 RETURN(rc);
 440         }
 441
 442         if (obd->obd_observer) {
 443                 /*
 444                  * Tell the observer about the new target.
 445                  */
 446                 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
 447                                 OBD_NOTIFY_ACTIVE, (void *)(tgt - lmv->tgts));
 448                 if (rc) {
 449                         obd_disconnect(mdc_exp);
 450                         RETURN(rc);
 451                 }
 452         }
 453
 454         tgt->ltd_active = 1;
 455         tgt->ltd_exp = mdc_exp;
 456         lmv->desc.ld_active_tgt_count++;
 457
 458         /*
 459          * Copy connect data, it may be used later.
 460          */
 461         lmv->datas[tgt->ltd_idx] = *mdc_data;
 462
 463         md_init_ea_size(tgt->ltd_exp, lmv->max_easize,
 464                         lmv->max_def_easize, lmv->max_cookiesize);
 465
 466         CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
 467                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 468                 cfs_atomic_read(&obd->obd_refcount));
 469
 470 #ifdef __KERNEL__
 471         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 472         if (lmv_proc_dir) {
 473                 struct proc_dir_entry *mdc_symlink;
 474
 475                 LASSERT(mdc_obd->obd_type != NULL);
 476                 LASSERT(mdc_obd->obd_type->typ_name != NULL);
 477                 mdc_symlink = lprocfs_add_symlink(mdc_obd->obd_name,
 478                                                   lmv_proc_dir,
 479                                                   "../../../%s/%s",
 480                                                   mdc_obd->obd_type->typ_name,
 481                                                   mdc_obd->obd_name);
 482                 if (mdc_symlink == NULL) {
 483                         CERROR("Could not register LMV target "
 484                                "/proc/fs/lustre/%s/%s/target_obds/%s.",
 485                                obd->obd_type->typ_name, obd->obd_name,
 486                                mdc_obd->obd_name);
 487                         lprocfs_remove(&lmv_proc_dir);
 488                         lmv_proc_dir = NULL;
 489                 }
 490         }
 491 #endif
 492         RETURN(0);
 493 }
 494
 495 int lmv_add_target(struct obd_device *obd, struct obd_uuid *tgt_uuid)
 496 {
 497         struct lmv_obd      *lmv = &obd->u.lmv;
 498         struct lmv_tgt_desc *tgt;
 499         int                  rc = 0;
 500         ENTRY;
 501
 502         CDEBUG(D_CONFIG, "Target uuid: %s.\n", tgt_uuid->uuid);
 503
 504         lmv_init_lock(lmv);
 505
 506         if (lmv->desc.ld_active_tgt_count >= LMV_MAX_TGT_COUNT) {
 507                 lmv_init_unlock(lmv);
 508                 CERROR("Can't add %s, LMV module compiled for %d MDCs. "
 509                        "That many MDCs already configured.\n",
 510                        tgt_uuid->uuid, LMV_MAX_TGT_COUNT);
 511                 RETURN(-EINVAL);
 512         }
 513         if (lmv->desc.ld_tgt_count == 0) {
 514                 struct obd_device *mdc_obd;
 515
 516                 mdc_obd = class_find_client_obd(tgt_uuid, LUSTRE_MDC_NAME,
 517                                                 &obd->obd_uuid);
 518                 if (!mdc_obd) {
 519                         lmv_init_unlock(lmv);
 520                         CERROR("Target %s not attached\n", tgt_uuid->uuid);
 521                         RETURN(-EINVAL);
 522                 }
 523
 524                 rc = obd_llog_init(obd, &obd->obd_olg, mdc_obd, NULL);
 525                 if (rc) {
 526                         lmv_init_unlock(lmv);
 527                         CERROR("lmv failed to setup llogging subsystems\n");
 528                 }
 529         }
 530         cfs_spin_lock(&lmv->lmv_lock);
 531         tgt = lmv->tgts + lmv->desc.ld_tgt_count++;
 532         tgt->ltd_uuid = *tgt_uuid;
 533         cfs_spin_unlock(&lmv->lmv_lock);
 534
 535         if (lmv->connected) {
 536                 rc = lmv_connect_mdc(obd, tgt);
 537                 if (rc) {
 538                         cfs_spin_lock(&lmv->lmv_lock);
 539                         lmv->desc.ld_tgt_count--;
 540                         memset(tgt, 0, sizeof(*tgt));
 541                         cfs_spin_unlock(&lmv->lmv_lock);
 542                 } else {
 543                         int easize = sizeof(struct lmv_stripe_md) +
 544                                      lmv->desc.ld_tgt_count *
 545                                      sizeof(struct lu_fid);
 546                         lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
 547                 }
 548         }
 549
 550         lmv_init_unlock(lmv);
 551         RETURN(rc);
 552 }
 553
 554 int lmv_check_connect(struct obd_device *obd)
 555 {
 556         struct lmv_obd       *lmv = &obd->u.lmv;
 557         struct lmv_tgt_desc  *tgt;
 558         int                   i;
 559         int                   rc;
 560         int                   easize;
 561         ENTRY;
 562
 563         if (lmv->connected)
 564                 RETURN(0);
 565
 566         lmv_init_lock(lmv);
 567         if (lmv->connected) {
 568                 lmv_init_unlock(lmv);
 569                 RETURN(0);
 570         }
 571
 572         if (lmv->desc.ld_tgt_count == 0) {
 573                 CERROR("%s: no targets configured.\n", obd->obd_name);
 574                 RETURN(-EINVAL);
 575         }
 576
 577         CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
 578                lmv->cluuid.uuid, obd->obd_name);
 579
 580         LASSERT(lmv->tgts != NULL);
 581
 582         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 583                 rc = lmv_connect_mdc(obd, tgt);
 584                 if (rc)
 585                         GOTO(out_disc, rc);
 586         }
 587
 588         lmv_set_timeouts(obd);
 589         class_export_put(lmv->exp);
 590         lmv->connected = 1;
 591         easize = lmv_get_easize(lmv);
 592         lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
 593         lmv_init_unlock(lmv);
 594         RETURN(0);
 595
 596  out_disc:
 597         while (i-- > 0) {
 598                 int rc2;
 599                 --tgt;
 600                 tgt->ltd_active = 0;
 601                 if (tgt->ltd_exp) {
 602                         --lmv->desc.ld_active_tgt_count;
 603                         rc2 = obd_disconnect(tgt->ltd_exp);
 604                         if (rc2) {
 605                                 CERROR("LMV target %s disconnect on "
 606                                        "MDC idx %d: error %d\n",
 607                                        tgt->ltd_uuid.uuid, i, rc2);
 608                         }
 609                 }
 610         }
 611         class_disconnect(lmv->exp);
 612         lmv_init_unlock(lmv);
 613         RETURN(rc);
 614 }
 615
 616 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 617 {
 618 #ifdef __KERNEL__
 619         struct proc_dir_entry  *lmv_proc_dir;
 620 #endif
 621         struct lmv_obd         *lmv = &obd->u.lmv;
 622         struct obd_device      *mdc_obd;
 623         int                     rc;
 624         ENTRY;
 625
 626         LASSERT(tgt != NULL);
 627         LASSERT(obd != NULL);
 628
 629         mdc_obd = class_exp2obd(tgt->ltd_exp);
 630
 631         if (mdc_obd) {
 632                 mdc_obd->obd_force = obd->obd_force;
 633                 mdc_obd->obd_fail = obd->obd_fail;
 634                 mdc_obd->obd_no_recov = obd->obd_no_recov;
 635         }
 636
 637 #ifdef __KERNEL__
 638         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 639         if (lmv_proc_dir) {
 640                 struct proc_dir_entry *mdc_symlink;
 641
 642                 mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
 643                 if (mdc_symlink) {
 644                         lprocfs_remove(&mdc_symlink);
 645                 } else {
 646                         CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
 647                                obd->obd_type->typ_name, obd->obd_name,
 648                                mdc_obd->obd_name);
 649                 }
 650         }
 651 #endif
 652         rc = obd_fid_fini(tgt->ltd_exp);
 653         if (rc)
 654                 CERROR("Can't finanize fids factory\n");
 655
 656         CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
 657                tgt->ltd_exp->exp_obd->obd_name,
 658                tgt->ltd_exp->exp_obd->obd_uuid.uuid);
 659
 660         obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
 661         rc = obd_disconnect(tgt->ltd_exp);
 662         if (rc) {
 663                 if (tgt->ltd_active) {
 664                         CERROR("Target %s disconnect error %d\n",
 665                                tgt->ltd_uuid.uuid, rc);
 666                 }
 667         }
 668
 669         lmv_activate_target(lmv, tgt, 0);
 670         tgt->ltd_exp = NULL;
 671         RETURN(0);
 672 }
 673
 674 static int lmv_disconnect(struct obd_export *exp)
 675 {
 676         struct obd_device     *obd = class_exp2obd(exp);
 677 #ifdef __KERNEL__
 678         struct proc_dir_entry *lmv_proc_dir;
 679 #endif
 680         struct lmv_obd        *lmv = &obd->u.lmv;
 681         int                    rc;
 682         int                    i;
 683         ENTRY;
 684
 685         if (!lmv->tgts)
 686                 goto out_local;
 687
 688         /*
 689          * Only disconnect the underlying layers on the final disconnect.
 690          */
 691         lmv->refcount--;
 692         if (lmv->refcount != 0)
 693                 goto out_local;
 694
 695         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 696                 if (lmv->tgts[i].ltd_exp == NULL)
 697                         continue;
 698                 lmv_disconnect_mdc(obd, &lmv->tgts[i]);
 699         }
 700
 701 #ifdef __KERNEL__
 702         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 703         if (lmv_proc_dir) {
 704                 lprocfs_remove(&lmv_proc_dir);
 705         } else {
 706                 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
 707                        obd->obd_type->typ_name, obd->obd_name);
 708         }
 709 #endif
 710
 711 out_local:
 712         /*
 713          * This is the case when no real connection is established by
 714          * lmv_check_connect().
 715          */
 716         if (!lmv->connected)
 717                 class_export_put(exp);
 718         rc = class_disconnect(exp);
 719         if (lmv->refcount == 0)
 720                 lmv->connected = 0;
 721         RETURN(rc);
 722 }
 723
 724 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 725                          int len, void *karg, void *uarg)
 726 {
 727         struct obd_device    *obddev = class_exp2obd(exp);
 728         struct lmv_obd       *lmv = &obddev->u.lmv;
 729         int                   i = 0;
 730         int                   rc = 0;
 731         int                   set = 0;
 732         int                   count = lmv->desc.ld_tgt_count;
 733         ENTRY;
 734
 735         if (count == 0)
 736                 RETURN(-ENOTTY);
 737
 738         switch (cmd) {
 739         case IOC_OBD_STATFS: {
 740                 struct obd_ioctl_data *data = karg;
 741                 struct obd_device *mdc_obd;
 742                 struct obd_statfs stat_buf = {0};
 743                 __u32 index;
 744
 745                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
 746                 if ((index >= count))
 747                         RETURN(-ENODEV);
 748
 749                 if (!lmv->tgts[index].ltd_active)
 750                         RETURN(-ENODATA);
 751
 752                 mdc_obd = class_exp2obd(lmv->tgts[index].ltd_exp);
 753                 if (!mdc_obd)
 754                         RETURN(-EINVAL);
 755
 756                 /* copy UUID */
 757                 if (cfs_copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
 758                                      min((int) data->ioc_plen2,
 759                                          (int) sizeof(struct obd_uuid))))
 760                         RETURN(-EFAULT);
 761
 762                 rc = obd_statfs(mdc_obd, &stat_buf,
 763                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 764                                 0);
 765                 if (rc)
 766                         RETURN(rc);
 767                 if (cfs_copy_to_user(data->ioc_pbuf1, &stat_buf,
 768                                      min((int) data->ioc_plen1,
 769                                          (int) sizeof(stat_buf))))
 770                         RETURN(-EFAULT);
 771                 break;
 772         }
 773         case OBD_IOC_QUOTACTL: {
 774                 struct if_quotactl *qctl = karg;
 775                 struct lmv_tgt_desc *tgt = NULL;
 776                 struct obd_quotactl *oqctl;
 777
 778                 if (qctl->qc_valid == QC_MDTIDX) {
 779                         if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
 780                                 RETURN(-EINVAL);
 781
 782                         tgt = &lmv->tgts[qctl->qc_idx];
 783                         if (!tgt->ltd_exp)
 784                                 RETURN(-EINVAL);
 785                 } else if (qctl->qc_valid == QC_UUID) {
 786                         for (i = 0; i < count; i++) {
 787                                 tgt = &lmv->tgts[i];
 788                                 if (!obd_uuid_equals(&tgt->ltd_uuid,
 789                                                      &qctl->obd_uuid))
 790                                         continue;
 791
 792                                 if (tgt->ltd_exp == NULL)
 793                                         RETURN(-EINVAL);
 794
 795                                 break;
 796                         }
 797                 } else {
 798                         RETURN(-EINVAL);
 799                 }
 800
 801                 if (i >= count)
 802                         RETURN(-EAGAIN);
 803
 804                 LASSERT(tgt && tgt->ltd_exp);
 805                 OBD_ALLOC_PTR(oqctl);
 806                 if (!oqctl)
 807                         RETURN(-ENOMEM);
 808
 809                 QCTL_COPY(oqctl, qctl);
 810                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
 811                 if (rc == 0) {
 812                         QCTL_COPY(qctl, oqctl);
 813                         qctl->qc_valid = QC_MDTIDX;
 814                         qctl->obd_uuid = tgt->ltd_uuid;
 815                 }
 816                 OBD_FREE_PTR(oqctl);
 817                 break;
 818         }
 819         case OBD_IOC_CHANGELOG_SEND:
 820         case OBD_IOC_CHANGELOG_CLEAR: {
 821                 struct ioc_changelog *icc = karg;
 822
 823                 if (icc->icc_mdtindex >= count)
 824                         RETURN(-ENODEV);
 825
 826                 rc = obd_iocontrol(cmd, lmv->tgts[icc->icc_mdtindex].ltd_exp,
 827                                    sizeof(*icc), icc, NULL);
 828                 break;
 829         }
 830         case LL_IOC_GET_CONNECT_FLAGS: {
 831                 rc = obd_iocontrol(cmd, lmv->tgts[0].ltd_exp, len, karg, uarg);
 832                 break;
 833         }
 834
 835         default : {
 836                 for (i = 0; i < count; i++) {
 837                         int err;
 838                         struct obd_device *mdc_obd;
 839
 840                         if (lmv->tgts[i].ltd_exp == NULL)
 841                                 continue;
 842                         /* ll_umount_begin() sets force flag but for lmv, not
 843                          * mdc. Let's pass it through */
 844                         mdc_obd = class_exp2obd(lmv->tgts[i].ltd_exp);
 845                         mdc_obd->obd_force = obddev->obd_force;
 846                         err = obd_iocontrol(cmd, lmv->tgts[i].ltd_exp, len,
 847                                             karg, uarg);
 848                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
 849                                 RETURN(err);
 850                         } else if (err) {
 851                                 if (lmv->tgts[i].ltd_active) {
 852                                         CERROR("error: iocontrol MDC %s on MDT"
 853                                                "idx %d cmd %x: err = %d\n",
 854                                                 lmv->tgts[i].ltd_uuid.uuid,
 855                                                 i, cmd, err);
 856                                         if (!rc)
 857                                                 rc = err;
 858                                 }
 859                         } else
 860                                 set = 1;
 861                 }
 862                 if (!set && !rc)
 863                         rc = -EIO;
 864         }
 865         }
 866         RETURN(rc);
 867 }
 868
 869 static int lmv_all_chars_policy(int count, const char *name,
 870                                 int len)
 871 {
 872         unsigned int c = 0;
 873
 874         while (len > 0)
 875                 c += name[--len];
 876         c = c % count;
 877         return c;
 878 }
 879
 880 static int lmv_nid_policy(struct lmv_obd *lmv)
 881 {
 882         struct obd_import *imp;
 883         __u32              id;
 884
 885         /*
 886          * XXX: To get nid we assume that underlying obd device is mdc.
 887          */
 888         imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
 889         id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
 890         return id % lmv->desc.ld_tgt_count;
 891 }
 892
 893 static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
 894                           placement_policy_t placement)
 895 {
 896         switch (placement) {
 897         case PLACEMENT_CHAR_POLICY:
 898                 return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
 899                                             op_data->op_name,
 900                                             op_data->op_namelen);
 901         case PLACEMENT_NID_POLICY:
 902                 return lmv_nid_policy(lmv);
 903
 904         default:
 905                 break;
 906         }
 907
 908         CERROR("Unsupported placement policy %x\n", placement);
 909         return -EINVAL;
 910 }
 911
 912 /**
 913  * This is _inode_ placement policy function (not name).
 914  */
 915 static int lmv_placement_policy(struct obd_device *obd,
 916                                 struct md_op_data *op_data,
 917                                 mdsno_t *mds)
 918 {
 919         struct lmv_obd          *lmv = &obd->u.lmv;
 920         struct lmv_object       *obj;
 921         int                      rc;
 922         ENTRY;
 923
 924         LASSERT(mds != NULL);
 925
 926         if (lmv->desc.ld_tgt_count == 1) {
 927                 *mds = 0;
 928                 RETURN(0);
 929         }
 930
 931         /*
 932          * Allocate new fid on target according to operation type and parent
 933          * home mds.
 934          */
 935         obj = lmv_object_find(obd, &op_data->op_fid1);
 936         if (obj != NULL || op_data->op_name == NULL ||
 937             op_data->op_opc != LUSTRE_OPC_MKDIR) {
 938                 /*
 939                  * Allocate fid for non-dir or for null name or for case parent
 940                  * dir is split.
 941                  */
 942                 if (obj) {
 943                         lmv_object_put(obj);
 944
 945                         /*
 946                          * If we have this flag turned on, and we see that
 947                          * parent dir is split, this means, that caller did not
 948                          * notice split yet. This is race and we would like to
 949                          * let caller know that.
 950                          */
 951                         if (op_data->op_bias & MDS_CHECK_SPLIT)
 952                                 RETURN(-ERESTART);
 953                 }
 954
 955                 /*
 956                  * Allocate new fid on same mds where parent fid is located and
 957                  * where operation will be sent. In case of split dir, ->op_fid1
 958                  * and ->op_mds here will contain fid and mds of slave directory
 959                  * object (assigned by caller).
 960                  */
 961                 *mds = op_data->op_mds;
 962                 rc = 0;
 963         } else {
 964                 /*
 965                  * Parent directory is not split and we want to create a
 966                  * directory in it. Let's calculate where to place it according
 967                  * to operation data @op_data.
 968                  */
 969                 *mds = lmv_choose_mds(lmv, op_data, lmv->lmv_placement);
 970                 rc = 0;
 971         }
 972
 973         if (rc) {
 974                 CERROR("Can't choose MDS, err = %d\n", rc);
 975         } else {
 976                 LASSERT(*mds < lmv->desc.ld_tgt_count);
 977         }
 978
 979         RETURN(rc);
 980 }
 981
 982 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid,
 983                     mdsno_t mds)
 984 {
 985         struct lmv_tgt_desc *tgt;
 986         int                  rc;
 987         ENTRY;
 988
 989         tgt = lmv_get_target(lmv, mds);
 990
 991         /*
 992          * New seq alloc and FLD setup should be atomic. Otherwise we may find
 993          * on server that seq in new allocated fid is not yet known.
 994          */
 995         cfs_down(&tgt->ltd_fid_sem);
 996
 997         if (!tgt->ltd_active)
 998                 GOTO(out, rc = -ENODEV);
 999
1000         /*
1001          * Asking underlaying tgt layer to allocate new fid.
1002          */
1003         rc = obd_fid_alloc(tgt->ltd_exp, fid, NULL);
1004         if (rc > 0) {
1005                 LASSERT(fid_is_sane(fid));
1006                 rc = 0;
1007         }
1008
1009         EXIT;
1010 out:
1011         cfs_up(&tgt->ltd_fid_sem);
1012         return rc;
1013 }
1014
1015 int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1016                   struct md_op_data *op_data)
1017 {
1018         struct obd_device     *obd = class_exp2obd(exp);
1019         struct lmv_obd        *lmv = &obd->u.lmv;
1020         mdsno_t                mds;
1021         int                    rc;
1022         ENTRY;
1023
1024         LASSERT(op_data != NULL);
1025         LASSERT(fid != NULL);
1026
1027         rc = lmv_placement_policy(obd, op_data, &mds);
1028         if (rc) {
1029                 CERROR("Can't get target for allocating fid, "
1030                        "rc %d\n", rc);
1031                 RETURN(rc);
1032         }
1033
1034         rc = __lmv_fid_alloc(lmv, fid, mds);
1035         if (rc) {
1036                 CERROR("Can't alloc new fid, rc %d\n", rc);
1037                 RETURN(rc);
1038         }
1039
1040         RETURN(rc);
1041 }
1042
1043 static int lmv_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
1044 {
1045         ENTRY;
1046         LASSERT(exp != NULL && fid != NULL);
1047         if (lmv_object_delete(exp, fid)) {
1048                 CDEBUG(D_INODE, "Object "DFID" is destroyed.\n",
1049                        PFID(fid));
1050         }
1051         RETURN(0);
1052 }
1053
1054 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1055 {
1056         struct lmv_obd             *lmv = &obd->u.lmv;
1057         struct lprocfs_static_vars  lvars;
1058         struct lmv_desc            *desc;
1059         int                         rc;
1060         int                         i = 0;
1061         ENTRY;
1062
1063         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1064                 CERROR("LMV setup requires a descriptor\n");
1065                 RETURN(-EINVAL);
1066         }
1067
1068         desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1069         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1070                 CERROR("Lmv descriptor size wrong: %d > %d\n",
1071                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1072                 RETURN(-EINVAL);
1073         }
1074
1075         lmv->tgts_size = LMV_MAX_TGT_COUNT * sizeof(struct lmv_tgt_desc);
1076
1077         OBD_ALLOC(lmv->tgts, lmv->tgts_size);
1078         if (lmv->tgts == NULL)
1079                 RETURN(-ENOMEM);
1080
1081         for (i = 0; i < LMV_MAX_TGT_COUNT; i++) {
1082                 cfs_sema_init(&lmv->tgts[i].ltd_fid_sem, 1);
1083                 lmv->tgts[i].ltd_idx = i;
1084         }
1085
1086         lmv->datas_size = LMV_MAX_TGT_COUNT * sizeof(struct obd_connect_data);
1087
1088         OBD_ALLOC(lmv->datas, lmv->datas_size);
1089         if (lmv->datas == NULL)
1090                 GOTO(out_free_tgts, rc = -ENOMEM);
1091
1092         obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1093         lmv->desc.ld_tgt_count = 0;
1094         lmv->desc.ld_active_tgt_count = 0;
1095         lmv->max_cookiesize = 0;
1096         lmv->max_def_easize = 0;
1097         lmv->max_easize = 0;
1098         lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
1099
1100         cfs_spin_lock_init(&lmv->lmv_lock);
1101         cfs_sema_init(&lmv->init_sem, 1);
1102
1103         rc = lmv_object_setup(obd);
1104         if (rc) {
1105                 CERROR("Can't setup LMV object manager, error %d.\n", rc);
1106                 GOTO(out_free_datas, rc);
1107         }
1108
1109         lprocfs_lmv_init_vars(&lvars);
1110         lprocfs_obd_setup(obd, lvars.obd_vars);
1111 #ifdef LPROCFS
1112         {
1113                 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd_status",
1114                                         0444, &lmv_proc_target_fops, obd);
1115                 if (rc)
1116                         CWARN("Error adding target_obd_stats file (%d)\n", 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, const struct lu_fid *fid,
2345                         struct obd_capa *oc, __u64 offset64,
2346                         struct page **pages, unsigned npages,
2347                         struct ptlrpc_request **request)
2348 {
2349         struct obd_device       *obd = exp->exp_obd;
2350         struct lmv_obd          *lmv = &obd->u.lmv;
2351         struct lu_fid            rid = *fid;
2352         struct lmv_object       *obj;
2353         __u64                    offset;
2354         __u64                    hash_adj = 0;
2355         __u32                    rank = 0;
2356         __u64                    seg_size = 0;
2357         __u64                    tgt_tmp = 0;
2358         int                      tgt_idx = 0;
2359         int                      tgt0_idx = 0;
2360         int                      rc;
2361         int                      nr = 0;
2362         int                      i;
2363         /* number of pages read, in CFS_PAGE_SIZE */
2364         int                      nrdpgs;
2365         /* number of pages transferred in LU_PAGE_SIZE */
2366         int                      nlupgs;
2367         struct lmv_stripe       *los;
2368         struct lmv_tgt_desc     *tgt;
2369         struct lu_dirpage       *dp;
2370         struct lu_dirent        *ent;
2371         ENTRY;
2372
2373         offset = offset64;
2374
2375         rc = lmv_check_connect(obd);
2376         if (rc)
2377                 RETURN(rc);
2378
2379         CDEBUG(D_INODE, "READPAGE at "LPX64" from "DFID"\n", offset, PFID(&rid));
2380
2381         /*
2382          * This case handle directory lookup in clustered metadata case (i.e.
2383          * split directory is located on multiple md servers.)
2384          * each server keeps directory entries for certain range of hashes.
2385          * E.g. we have N server and suppose hash range is 0 to MAX_HASH.
2386          * first server will keep records with hashes [ 0 ... MAX_HASH / N  - 1],
2387          * second one with hashes [MAX_HASH / N ... 2 * MAX_HASH / N] and
2388          * so on....
2389          *      readdir can simply start reading entries from 0 - N server in
2390          * order but that will not scale well as all client will request dir in
2391          * to server in same order.
2392          * Following algorithm does optimization:
2393          * Instead of doing readdir in 1, 2, ...., N order, client with a
2394          * rank R does readdir in R, R + 1, ..., N, 1, ... R - 1 order.
2395          * (every client has rank R)
2396          *      But ll_readdir() expect offset range [0 to MAX_HASH/N) but
2397          * since client ask dir from MDS{R} client has pages with offsets
2398          * [R*MAX_HASH/N ... (R + 1)*MAX_HASH/N] there for we do hash_adj
2399          * on hash  values that we get.
2400          */
2401         obj = lmv_object_find_lock(obd, fid);
2402         if (obj) {
2403                 nr       = obj->lo_objcount;
2404                 LASSERT(nr > 0);
2405                 seg_size = MAX_HASH_SIZE;
2406                 do_div(seg_size, nr);
2407                 los      = obj->lo_stripes;
2408                 tgt      = lmv_get_target(lmv, los[0].ls_mds);
2409                 rank     = lmv_node_rank(tgt->ltd_exp, fid) % nr;
2410                 tgt_tmp  = offset;
2411                 do_div(tgt_tmp, seg_size);
2412                 tgt0_idx = do_div(tgt_tmp,  nr);
2413                 tgt_idx  = (tgt0_idx + rank) % nr;
2414
2415                 if (tgt_idx < tgt0_idx)
2416                         /*
2417                          * Wrap around.
2418                          *
2419                          * Last segment has unusual length due to division
2420                          * rounding.
2421                          */
2422                         hash_adj = MAX_HASH_SIZE - seg_size * nr;
2423                 else
2424                         hash_adj = 0;
2425
2426                 hash_adj += rank * seg_size;
2427
2428                 CDEBUG(D_INODE, "Readpage hash adjustment: %x "LPX64" "
2429                        LPX64"/%x -> "LPX64"/%x\n", rank, hash_adj,
2430                        offset, tgt0_idx, offset + hash_adj, tgt_idx);
2431
2432                 offset = (offset + hash_adj) & MAX_HASH_SIZE;
2433                 rid = obj->lo_stripes[tgt_idx].ls_fid;
2434                 tgt = lmv_get_target(lmv, los[tgt_idx].ls_mds);
2435
2436                 CDEBUG(D_INODE, "Forward to "DFID" with offset %lu i %d\n",
2437                        PFID(&rid), (unsigned long)offset, tgt_idx);
2438         } else
2439                 tgt = lmv_find_target(lmv, &rid);
2440
2441         if (IS_ERR(tgt))
2442                 GOTO(cleanup, rc = PTR_ERR(tgt));
2443
2444         rc = md_readpage(tgt->ltd_exp, &rid, oc, offset, pages, npages,
2445                          request);
2446         if (rc)
2447                 GOTO(cleanup, rc);
2448
2449         nrdpgs = ((*request)->rq_bulk->bd_nob_transferred + CFS_PAGE_SIZE - 1)
2450                  >> CFS_PAGE_SHIFT;
2451         nlupgs = (*request)->rq_bulk->bd_nob_transferred >> LU_PAGE_SHIFT;
2452         LASSERT(!((*request)->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
2453         LASSERT(nrdpgs > 0 && nrdpgs <= npages);
2454
2455         CDEBUG(D_INODE, "read %d(%d)/%d pages\n", nrdpgs, nlupgs, npages);
2456
2457         for (i = 0; i < nrdpgs; i++) {
2458 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
2459                 struct lu_dirpage *first;
2460                 __u64 hash_end = 0;
2461                 __u32 flags = 0;
2462 #endif
2463                 struct lu_dirent *tmp = NULL;
2464
2465                 dp = cfs_kmap(pages[i]);
2466                 if (obj) {
2467                         lmv_hash_adjust(&dp->ldp_hash_start, hash_adj);
2468                         lmv_hash_adjust(&dp->ldp_hash_end,   hash_adj);
2469                         LASSERT(le64_to_cpu(dp->ldp_hash_start) <= offset64);
2470
2471                         if ((tgt0_idx != nr - 1) &&
2472                             (le64_to_cpu(dp->ldp_hash_end) == MDS_DIR_END_OFF))
2473                         {
2474                                 dp->ldp_hash_end = cpu_to_le32(seg_size *
2475                                                                (tgt0_idx + 1));
2476                                 CDEBUG(D_INODE,
2477                                        ""DFID" reset end "LPX64" tgt %d\n",
2478                                        PFID(&rid),
2479                                        (__u64)le64_to_cpu(dp->ldp_hash_end),
2480                                        tgt_idx);
2481                         }
2482                 }
2483
2484                 ent = lu_dirent_start(dp);
2485 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
2486                 first = dp;
2487                 hash_end = dp->ldp_hash_end;
2488 repeat:
2489 #endif
2490                 nlupgs--;
2491                 for (tmp = ent; ent != NULL;
2492                      tmp = ent, ent = lu_dirent_next(ent)) {
2493                         if (obj)
2494                                 lmv_hash_adjust(&ent->lde_hash, hash_adj);
2495                 }
2496
2497 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
2498                 dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
2499                 if (((unsigned long)dp & ~CFS_PAGE_MASK) && nlupgs > 0) {
2500                         ent = lu_dirent_start(dp);
2501
2502                         if (obj) {
2503                                 lmv_hash_adjust(&dp->ldp_hash_end, hash_adj);
2504                                 if ((tgt0_idx != nr - 1) &&
2505                                     (le64_to_cpu(dp->ldp_hash_end) ==
2506                                      MDS_DIR_END_OFF)) {
2507                                         hash_end = cpu_to_le32(seg_size *
2508                                                                (tgt0_idx + 1));
2509                                         CDEBUG(D_INODE,
2510                                             ""DFID" reset end "LPX64" tgt %d\n",
2511                                             PFID(&rid),
2512                                             (__u64)le64_to_cpu(hash_end),
2513                                             tgt_idx);
2514                                 }
2515                         }
2516                         hash_end = dp->ldp_hash_end;
2517                         flags = dp->ldp_flags;
2518
2519                         if (tmp) {
2520                                 /* enlarge the end entry lde_reclen from 0 to
2521                                  * first entry of next lu_dirpage, in this way
2522                                  * several lu_dirpages can be stored into one
2523                                  * client page on client. */
2524                                 tmp = ((void *)tmp) +
2525                                       le16_to_cpu(tmp->lde_reclen);
2526                                 tmp->lde_reclen =
2527                                         cpu_to_le16((char *)(dp->ldp_entries) -
2528                                                     (char *)tmp);
2529                                 goto repeat;
2530                         }
2531                 }
2532                 first->ldp_hash_end = hash_end;
2533                 first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
2534                 first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
2535 #else
2536                 SET_BUT_UNUSED(tmp);
2537 #endif
2538                 cfs_kunmap(pages[i]);
2539         }
2540         EXIT;
2541 cleanup:
2542         if (obj)
2543                 lmv_object_put_unlock(obj);
2544         return rc;
2545 }
2546
2547 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2548                       struct ptlrpc_request **request)
2549 {
2550         struct obd_device       *obd = exp->exp_obd;
2551         struct lmv_obd          *lmv = &obd->u.lmv;
2552         struct lmv_tgt_desc     *tgt = NULL;
2553         struct lmv_object       *obj;
2554         int                      rc;
2555         int                      sidx;
2556         int                      loop = 0;
2557         ENTRY;
2558
2559         rc = lmv_check_connect(obd);
2560         if (rc)
2561                 RETURN(rc);
2562
2563 repeat:
2564         ++loop;
2565         LASSERT(loop <= 2);
2566         LASSERT(op_data->op_namelen != 0);
2567
2568         obj = lmv_object_find(obd, &op_data->op_fid1);
2569         if (obj) {
2570                 sidx = raw_name2idx(obj->lo_hashtype,
2571                                     obj->lo_objcount,
2572                                     op_data->op_name,
2573                                     op_data->op_namelen);
2574                 op_data->op_bias &= ~MDS_CHECK_SPLIT;
2575                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2576                 tgt = lmv_get_target(lmv,
2577                                      obj->lo_stripes[sidx].ls_mds);
2578                 lmv_object_put(obj);
2579                 CDEBUG(D_INODE, "UNLINK '%*s' in "DFID" -> %u\n",
2580                        op_data->op_namelen, op_data->op_name,
2581                        PFID(&op_data->op_fid1), sidx);
2582         }
2583
2584         if (tgt == NULL) {
2585                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2586                 if (IS_ERR(tgt))
2587                         RETURN(PTR_ERR(tgt));
2588                 op_data->op_bias |= MDS_CHECK_SPLIT;
2589         }
2590
2591         op_data->op_fsuid = cfs_curproc_fsuid();
2592         op_data->op_fsgid = cfs_curproc_fsgid();
2593         op_data->op_cap = cfs_curproc_cap_pack();
2594
2595         /*
2596          * If child's fid is given, cancel unused locks for it if it is from
2597          * another export than parent.
2598          *
2599          * LOOKUP lock for child (fid3) should also be cancelled on parent
2600          * tgt_tgt in mdc_unlink().
2601          */
2602         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2603
2604         /*
2605          * Cancel FULL locks on child (fid3).
2606          */
2607         rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2608                               MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2609
2610         if (rc == 0)
2611                 rc = md_unlink(tgt->ltd_exp, op_data, request);
2612
2613         if (rc == -ERESTART) {
2614                 LASSERT(*request != NULL);
2615                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2616                           "Got -ERESTART during unlink!\n");
2617                 ptlrpc_req_finished(*request);
2618                 *request = NULL;
2619
2620                 /*
2621                  * Directory got split. Time to update local object and repeat
2622                  * the request with proper MDS.
2623                  */
2624                 rc = lmv_handle_split(exp, &op_data->op_fid1);
2625                 if (rc == 0)
2626                         goto repeat;
2627         }
2628         RETURN(rc);
2629 }
2630
2631 static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2632 {
2633         struct lmv_obd *lmv = &obd->u.lmv;
2634         int rc = 0;
2635
2636         switch (stage) {
2637         case OBD_CLEANUP_EARLY:
2638                 /* XXX: here should be calling obd_precleanup() down to
2639                  * stack. */
2640                 break;
2641         case OBD_CLEANUP_EXPORTS:
2642                 fld_client_proc_fini(&lmv->lmv_fld);
2643                 lprocfs_obd_cleanup(obd);
2644                 rc = obd_llog_finish(obd, 0);
2645                 if (rc != 0)
2646                         CERROR("failed to cleanup llogging subsystems\n");
2647                 break;
2648         default:
2649                 break;
2650         }
2651         RETURN(rc);
2652 }
2653
2654 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
2655                         void *key, __u32 *vallen, void *val,
2656                         struct lov_stripe_md *lsm)
2657 {
2658         struct obd_device       *obd;
2659         struct lmv_obd          *lmv;
2660         int                      rc = 0;
2661         ENTRY;
2662
2663         obd = class_exp2obd(exp);
2664         if (obd == NULL) {
2665                 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2666                        exp->exp_handle.h_cookie);
2667                 RETURN(-EINVAL);
2668         }
2669
2670         lmv = &obd->u.lmv;
2671         if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2672                 struct lmv_tgt_desc *tgts;
2673                 int i;
2674
2675                 rc = lmv_check_connect(obd);
2676                 if (rc)
2677                         RETURN(rc);
2678
2679                 LASSERT(*vallen == sizeof(__u32));
2680                 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count;
2681                      i++, tgts++) {
2682
2683                         /*
2684                          * All tgts should be connected when this gets called.
2685                          */
2686                         if (!tgts || !tgts->ltd_exp) {
2687                                 CERROR("target not setup?\n");
2688                                 continue;
2689                         }
2690
2691                         if (!obd_get_info(tgts->ltd_exp, keylen, key,
2692                                           vallen, val, NULL))
2693                                 RETURN(0);
2694                 }
2695                 RETURN(-EINVAL);
2696         } else if (KEY_IS(KEY_MAX_EASIZE) || KEY_IS(KEY_CONN_DATA)) {
2697                 rc = lmv_check_connect(obd);
2698                 if (rc)
2699                         RETURN(rc);
2700
2701                 /*
2702                  * Forwarding this request to first MDS, it should know LOV
2703                  * desc.
2704                  */
2705                 rc = obd_get_info(lmv->tgts[0].ltd_exp, keylen, key,
2706                                   vallen, val, NULL);
2707                 if (!rc && KEY_IS(KEY_CONN_DATA)) {
2708                         exp->exp_connect_flags =
2709                         ((struct obd_connect_data *)val)->ocd_connect_flags;
2710                 }
2711                 RETURN(rc);
2712         } else if (KEY_IS(KEY_TGT_COUNT)) {
2713                 *((int *)val) = lmv->desc.ld_tgt_count;
2714                 RETURN(0);
2715         }
2716
2717         CDEBUG(D_IOCTL, "Invalid key\n");
2718         RETURN(-EINVAL);
2719 }
2720
2721 int lmv_set_info_async(struct obd_export *exp, obd_count keylen,
2722                        void *key, obd_count vallen, void *val,
2723                        struct ptlrpc_request_set *set)
2724 {
2725         struct lmv_tgt_desc    *tgt;
2726         struct obd_device      *obd;
2727         struct lmv_obd         *lmv;
2728         int rc = 0;
2729         ENTRY;
2730
2731         obd = class_exp2obd(exp);
2732         if (obd == NULL) {
2733                 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2734                        exp->exp_handle.h_cookie);
2735                 RETURN(-EINVAL);
2736         }
2737         lmv = &obd->u.lmv;
2738
2739         if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX)) {
2740                 int i, err = 0;
2741
2742                 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2743                         tgt = &lmv->tgts[i];
2744
2745                         if (!tgt->ltd_exp)
2746                                 continue;
2747
2748                         err = obd_set_info_async(tgt->ltd_exp,
2749                                                  keylen, key, vallen, val, set);
2750                         if (err && rc == 0)
2751                                 rc = err;
2752                 }
2753
2754                 RETURN(rc);
2755         }
2756
2757         RETURN(-EINVAL);
2758 }
2759
2760 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
2761                struct lov_stripe_md *lsm)
2762 {
2763         struct obd_device         *obd = class_exp2obd(exp);
2764         struct lmv_obd            *lmv = &obd->u.lmv;
2765         struct lmv_stripe_md      *meap;
2766         struct lmv_stripe_md      *lsmp;
2767         int                        mea_size;
2768         int                        i;
2769         ENTRY;
2770
2771         mea_size = lmv_get_easize(lmv);
2772         if (!lmmp)
2773                 RETURN(mea_size);
2774
2775         if (*lmmp && !lsm) {
2776                 OBD_FREE_LARGE(*lmmp, mea_size);
2777                 *lmmp = NULL;
2778                 RETURN(0);
2779         }
2780
2781         if (*lmmp == NULL) {
2782                 OBD_ALLOC_LARGE(*lmmp, mea_size);
2783                 if (*lmmp == NULL)
2784                         RETURN(-ENOMEM);
2785         }
2786
2787         if (!lsm)
2788                 RETURN(mea_size);
2789
2790         lsmp = (struct lmv_stripe_md *)lsm;
2791         meap = (struct lmv_stripe_md *)*lmmp;
2792
2793         if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
2794             lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
2795                 RETURN(-EINVAL);
2796
2797         meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
2798         meap->mea_count = cpu_to_le32(lsmp->mea_count);
2799         meap->mea_master = cpu_to_le32(lsmp->mea_master);
2800
2801         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2802                 meap->mea_ids[i] = meap->mea_ids[i];
2803                 fid_cpu_to_le(&meap->mea_ids[i], &meap->mea_ids[i]);
2804         }
2805
2806         RETURN(mea_size);
2807 }
2808
2809 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
2810                  struct lov_mds_md *lmm, int lmm_size)
2811 {
2812         struct obd_device          *obd = class_exp2obd(exp);
2813         struct lmv_stripe_md      **tmea = (struct lmv_stripe_md **)lsmp;
2814         struct lmv_stripe_md       *mea = (struct lmv_stripe_md *)lmm;
2815         struct lmv_obd             *lmv = &obd->u.lmv;
2816         int                         mea_size;
2817         int                         i;
2818         __u32                       magic;
2819         ENTRY;
2820
2821         mea_size = lmv_get_easize(lmv);
2822         if (lsmp == NULL)
2823                 return mea_size;
2824
2825         if (*lsmp != NULL && lmm == NULL) {
2826                 OBD_FREE_LARGE(*tmea, mea_size);
2827                 *lsmp = NULL;
2828                 RETURN(0);
2829         }
2830
2831         LASSERT(mea_size == lmm_size);
2832
2833         OBD_ALLOC_LARGE(*tmea, mea_size);
2834         if (*tmea == NULL)
2835                 RETURN(-ENOMEM);
2836
2837         if (!lmm)
2838                 RETURN(mea_size);
2839
2840         if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
2841             mea->mea_magic == MEA_MAGIC_ALL_CHARS ||
2842             mea->mea_magic == MEA_MAGIC_HASH_SEGMENT)
2843         {
2844                 magic = le32_to_cpu(mea->mea_magic);
2845         } else {
2846                 /*
2847                  * Old mea is not handled here.
2848                  */
2849                 CERROR("Old not supportable EA is found\n");
2850                 LBUG();
2851         }
2852
2853         (*tmea)->mea_magic = magic;
2854         (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
2855         (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
2856
2857         for (i = 0; i < (*tmea)->mea_count; i++) {
2858                 (*tmea)->mea_ids[i] = mea->mea_ids[i];
2859                 fid_le_to_cpu(&(*tmea)->mea_ids[i], &(*tmea)->mea_ids[i]);
2860         }
2861         RETURN(mea_size);
2862 }
2863
2864 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
2865                              ldlm_policy_data_t *policy, ldlm_mode_t mode,
2866                              ldlm_cancel_flags_t flags, void *opaque)
2867 {
2868         struct obd_device       *obd = exp->exp_obd;
2869         struct lmv_obd          *lmv = &obd->u.lmv;
2870         int                      rc = 0;
2871         int                      err;
2872         int                      i;
2873         ENTRY;
2874
2875         LASSERT(fid != NULL);
2876
2877         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2878                 if (!lmv->tgts[i].ltd_exp || !lmv->tgts[i].ltd_active)
2879                         continue;
2880
2881                 err = md_cancel_unused(lmv->tgts[i].ltd_exp, fid,
2882                                        policy, mode, flags, opaque);
2883                 if (!rc)
2884                         rc = err;
2885         }
2886         RETURN(rc);
2887 }
2888
2889 int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
2890                       __u64 *bits)
2891 {
2892         struct obd_device       *obd = exp->exp_obd;
2893         struct lmv_obd          *lmv = &obd->u.lmv;
2894         int                      rc;
2895         ENTRY;
2896
2897         rc =  md_set_lock_data(lmv->tgts[0].ltd_exp, lockh, data, bits);
2898         RETURN(rc);
2899 }
2900
2901 ldlm_mode_t lmv_lock_match(struct obd_export *exp, int flags,
2902                            const struct lu_fid *fid, ldlm_type_t type,
2903                            ldlm_policy_data_t *policy, ldlm_mode_t mode,
2904                            struct lustre_handle *lockh)
2905 {
2906         struct obd_device       *obd = exp->exp_obd;
2907         struct lmv_obd          *lmv = &obd->u.lmv;
2908         ldlm_mode_t              rc;
2909         int                      i;
2910         ENTRY;
2911
2912         CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
2913
2914         /*
2915          * With CMD every object can have two locks in different namespaces:
2916          * lookup lock in space of mds storing direntry and update/open lock in
2917          * space of mds storing inode. Thus we check all targets, not only that
2918          * one fid was created in.
2919          */
2920         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2921                 rc = md_lock_match(lmv->tgts[i].ltd_exp, flags, fid,
2922                                    type, policy, mode, lockh);
2923                 if (rc)
2924                         RETURN(rc);
2925         }
2926
2927         RETURN(0);
2928 }
2929
2930 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
2931                       struct obd_export *dt_exp, struct obd_export *md_exp,
2932                       struct lustre_md *md)
2933 {
2934         struct obd_device       *obd = exp->exp_obd;
2935         struct lmv_obd          *lmv = &obd->u.lmv;
2936         int                      rc;
2937         ENTRY;
2938         rc = md_get_lustre_md(lmv->tgts[0].ltd_exp, req, dt_exp, md_exp, md);
2939         RETURN(rc);
2940 }
2941
2942 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
2943 {
2944         struct obd_device       *obd = exp->exp_obd;
2945         struct lmv_obd          *lmv = &obd->u.lmv;
2946         ENTRY;
2947
2948         if (md->mea)
2949                 obd_free_memmd(exp, (void *)&md->mea);
2950         RETURN(md_free_lustre_md(lmv->tgts[0].ltd_exp, md));
2951 }
2952
2953 int lmv_set_open_replay_data(struct obd_export *exp,
2954                              struct obd_client_handle *och,
2955                              struct ptlrpc_request *open_req)
2956 {
2957         struct obd_device       *obd = exp->exp_obd;
2958         struct lmv_obd          *lmv = &obd->u.lmv;
2959         struct lmv_tgt_desc     *tgt;
2960         ENTRY;
2961
2962         tgt = lmv_find_target(lmv, &och->och_fid);
2963         if (IS_ERR(tgt))
2964                 RETURN(PTR_ERR(tgt));
2965
2966         RETURN(md_set_open_replay_data(tgt->ltd_exp, och, open_req));
2967 }
2968
2969 int lmv_clear_open_replay_data(struct obd_export *exp,
2970                                struct obd_client_handle *och)
2971 {
2972         struct obd_device       *obd = exp->exp_obd;
2973         struct lmv_obd          *lmv = &obd->u.lmv;
2974         struct lmv_tgt_desc     *tgt;
2975         ENTRY;
2976
2977         tgt = lmv_find_target(lmv, &och->och_fid);
2978         if (IS_ERR(tgt))
2979                 RETURN(PTR_ERR(tgt));
2980
2981         RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
2982 }
2983
2984 static int lmv_get_remote_perm(struct obd_export *exp,
2985                                const struct lu_fid *fid,
2986                                struct obd_capa *oc, __u32 suppgid,
2987                                struct ptlrpc_request **request)
2988 {
2989         struct obd_device       *obd = exp->exp_obd;
2990         struct lmv_obd          *lmv = &obd->u.lmv;
2991         struct lmv_tgt_desc     *tgt;
2992         int                      rc;
2993         ENTRY;
2994
2995         rc = lmv_check_connect(obd);
2996         if (rc)
2997                 RETURN(rc);
2998
2999         tgt = lmv_find_target(lmv, fid);
3000         if (IS_ERR(tgt))
3001                 RETURN(PTR_ERR(tgt));
3002
3003         rc = md_get_remote_perm(tgt->ltd_exp, fid, oc, suppgid, request);
3004         RETURN(rc);
3005 }
3006
3007 static int lmv_renew_capa(struct obd_export *exp, struct obd_capa *oc,
3008                           renew_capa_cb_t cb)
3009 {
3010         struct obd_device       *obd = exp->exp_obd;
3011         struct lmv_obd          *lmv = &obd->u.lmv;
3012         struct lmv_tgt_desc     *tgt;
3013         int                      rc;
3014         ENTRY;
3015
3016         rc = lmv_check_connect(obd);
3017         if (rc)
3018                 RETURN(rc);
3019
3020         tgt = lmv_find_target(lmv, &oc->c_capa.lc_fid);
3021         if (IS_ERR(tgt))
3022                 RETURN(PTR_ERR(tgt));
3023
3024         rc = md_renew_capa(tgt->ltd_exp, oc, cb);
3025         RETURN(rc);
3026 }
3027
3028 int lmv_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
3029                     const struct req_msg_field *field, struct obd_capa **oc)
3030 {
3031         struct obd_device *obd = exp->exp_obd;
3032         struct lmv_obd *lmv = &obd->u.lmv;
3033         int rc;
3034
3035         ENTRY;
3036         rc = md_unpack_capa(lmv->tgts[0].ltd_exp, req, field, oc);
3037         RETURN(rc);
3038 }
3039
3040 int lmv_intent_getattr_async(struct obd_export *exp,
3041                              struct md_enqueue_info *minfo,
3042                              struct ldlm_enqueue_info *einfo)
3043 {
3044         struct md_op_data       *op_data = &minfo->mi_data;
3045         struct obd_device       *obd = exp->exp_obd;
3046         struct lmv_obd          *lmv = &obd->u.lmv;
3047         struct lmv_object       *obj;
3048         struct lmv_tgt_desc     *tgt = NULL;
3049         int                      rc;
3050         int                      sidx;
3051         ENTRY;
3052
3053         rc = lmv_check_connect(obd);
3054         if (rc)
3055                 RETURN(rc);
3056
3057         if (op_data->op_namelen) {
3058                 obj = lmv_object_find(obd, &op_data->op_fid1);
3059                 if (obj) {
3060                         sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
3061                                             (char *)op_data->op_name,
3062                                             op_data->op_namelen);
3063                         op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
3064                         tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
3065                         lmv_object_put(obj);
3066                 }
3067         }
3068
3069         if (tgt == NULL)
3070                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
3071
3072         if (IS_ERR(tgt))
3073                 RETURN(PTR_ERR(tgt));
3074
3075         rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
3076         RETURN(rc);
3077 }
3078
3079 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
3080                         struct lu_fid *fid, __u64 *bits)
3081 {
3082         struct obd_device       *obd = exp->exp_obd;
3083         struct lmv_obd          *lmv = &obd->u.lmv;
3084         struct lmv_tgt_desc     *tgt;
3085         int                      rc;
3086         ENTRY;
3087
3088         rc = lmv_check_connect(obd);
3089         if (rc)
3090                 RETURN(rc);
3091
3092         tgt = lmv_find_target(lmv, fid);
3093         if (IS_ERR(tgt))
3094                 RETURN(PTR_ERR(tgt));
3095
3096         rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
3097         RETURN(rc);
3098 }
3099
3100 /**
3101  * For lmv, only need to send request to master MDT, and the master MDT will
3102  * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
3103  * we directly fetch data from the slave MDTs.
3104  */
3105 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
3106                  struct obd_quotactl *oqctl)
3107 {
3108         struct obd_device   *obd = class_exp2obd(exp);
3109         struct lmv_obd      *lmv = &obd->u.lmv;
3110         struct lmv_tgt_desc *tgt = &lmv->tgts[0];
3111         int                  rc = 0, i;
3112         __u64                curspace, curinodes;
3113         ENTRY;
3114
3115         if (!lmv->desc.ld_tgt_count || !tgt->ltd_active) {
3116                 CERROR("master lmv inactive\n");
3117                 RETURN(-EIO);
3118         }
3119
3120         if (oqctl->qc_cmd != Q_GETOQUOTA) {
3121                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
3122                 RETURN(rc);
3123         }
3124
3125         curspace = curinodes = 0;
3126         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3127                 int err;
3128                 tgt = &lmv->tgts[i];
3129
3130                 if (tgt->ltd_exp == NULL)
3131                         continue;
3132                 if (!tgt->ltd_active) {
3133                         CDEBUG(D_HA, "mdt %d is inactive.\n", i);
3134                         continue;
3135                 }
3136
3137                 err = obd_quotactl(tgt->ltd_exp, oqctl);
3138                 if (err) {
3139                         CERROR("getquota on mdt %d failed. %d\n", i, err);
3140                         if (!rc)
3141                                 rc = err;
3142                 } else {
3143                         curspace += oqctl->qc_dqblk.dqb_curspace;
3144                         curinodes += oqctl->qc_dqblk.dqb_curinodes;
3145                 }
3146         }
3147         oqctl->qc_dqblk.dqb_curspace = curspace;
3148         oqctl->qc_dqblk.dqb_curinodes = curinodes;
3149
3150         RETURN(rc);
3151 }
3152
3153 int lmv_quotacheck(struct obd_device *unused, struct obd_export *exp,
3154                    struct obd_quotactl *oqctl)
3155 {
3156         struct obd_device   *obd = class_exp2obd(exp);
3157         struct lmv_obd      *lmv = &obd->u.lmv;
3158         struct lmv_tgt_desc *tgt;
3159         int                  i, rc = 0;
3160         ENTRY;
3161
3162         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
3163                 int err;
3164
3165                 if (!tgt->ltd_active) {
3166                         CERROR("lmv idx %d inactive\n", i);
3167                         RETURN(-EIO);
3168                 }
3169
3170                 err = obd_quotacheck(tgt->ltd_exp, oqctl);
3171                 if (err && !rc)
3172                         rc = err;
3173         }
3174
3175         RETURN(rc);
3176 }
3177
3178 struct obd_ops lmv_obd_ops = {
3179         .o_owner                = THIS_MODULE,
3180         .o_setup                = lmv_setup,
3181         .o_cleanup              = lmv_cleanup,
3182         .o_precleanup           = lmv_precleanup,
3183         .o_process_config       = lmv_process_config,
3184         .o_connect              = lmv_connect,
3185         .o_disconnect           = lmv_disconnect,
3186         .o_statfs               = lmv_statfs,
3187         .o_get_info             = lmv_get_info,
3188         .o_set_info_async       = lmv_set_info_async,
3189         .o_packmd               = lmv_packmd,
3190         .o_unpackmd             = lmv_unpackmd,
3191         .o_notify               = lmv_notify,
3192         .o_get_uuid             = lmv_get_uuid,
3193         .o_iocontrol            = lmv_iocontrol,
3194         .o_fid_delete           = lmv_fid_delete,
3195         .o_quotacheck           = lmv_quotacheck,
3196         .o_quotactl             = lmv_quotactl
3197 };
3198
3199 struct md_ops lmv_md_ops = {
3200         .m_getstatus            = lmv_getstatus,
3201         .m_change_cbdata        = lmv_change_cbdata,
3202         .m_find_cbdata          = lmv_find_cbdata,
3203         .m_close                = lmv_close,
3204         .m_create               = lmv_create,
3205         .m_done_writing         = lmv_done_writing,
3206         .m_enqueue              = lmv_enqueue,
3207         .m_getattr              = lmv_getattr,
3208         .m_getxattr             = lmv_getxattr,
3209         .m_getattr_name         = lmv_getattr_name,
3210         .m_intent_lock          = lmv_intent_lock,
3211         .m_link                 = lmv_link,
3212         .m_rename               = lmv_rename,
3213         .m_setattr              = lmv_setattr,
3214         .m_setxattr             = lmv_setxattr,
3215         .m_sync                 = lmv_sync,
3216         .m_readpage             = lmv_readpage,
3217         .m_unlink               = lmv_unlink,
3218         .m_init_ea_size         = lmv_init_ea_size,
3219         .m_cancel_unused        = lmv_cancel_unused,
3220         .m_set_lock_data        = lmv_set_lock_data,
3221         .m_lock_match           = lmv_lock_match,
3222         .m_get_lustre_md        = lmv_get_lustre_md,
3223         .m_free_lustre_md       = lmv_free_lustre_md,
3224         .m_set_open_replay_data = lmv_set_open_replay_data,
3225         .m_clear_open_replay_data = lmv_clear_open_replay_data,
3226         .m_renew_capa           = lmv_renew_capa,
3227         .m_unpack_capa          = lmv_unpack_capa,
3228         .m_get_remote_perm      = lmv_get_remote_perm,
3229         .m_intent_getattr_async = lmv_intent_getattr_async,
3230         .m_revalidate_lock      = lmv_revalidate_lock
3231 };
3232
3233 int __init lmv_init(void)
3234 {
3235         struct lprocfs_static_vars lvars;
3236         int                        rc;
3237
3238         lmv_object_cache = cfs_mem_cache_create("lmv_objects",
3239                                                 sizeof(struct lmv_object),
3240                                                 0, 0);
3241         if (!lmv_object_cache) {
3242                 CERROR("Error allocating lmv objects cache\n");
3243                 return -ENOMEM;
3244         }
3245
3246         lprocfs_lmv_init_vars(&lvars);
3247
3248         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
3249                                  lvars.module_vars, LUSTRE_LMV_NAME, NULL);
3250         if (rc)
3251                 cfs_mem_cache_destroy(lmv_object_cache);
3252
3253         return rc;
3254 }
3255
3256 #ifdef __KERNEL__
3257 static void lmv_exit(void)
3258 {
3259         class_unregister_type(LUSTRE_LMV_NAME);
3260
3261         LASSERTF(cfs_atomic_read(&lmv_object_count) == 0,
3262                  "Can't free lmv objects cache, %d object(s) busy\n",
3263                  cfs_atomic_read(&lmv_object_count));
3264         cfs_mem_cache_destroy(lmv_object_cache);
3265 }
3266
3267 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3268 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
3269 MODULE_LICENSE("GPL");
3270
3271 module_init(lmv_init);
3272 module_exit(lmv_exit);
3273 #endif