lustre/lmv/lmv_obd.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  *
  32  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  33  */
  34 /*
  35  * This file is part of Lustre, http://www.lustre.org/
  36  * Lustre is a trademark of Sun Microsystems, Inc.
  37  */
  38
  39 #ifndef EXPORT_SYMTAB
  40 # define EXPORT_SYMTAB
  41 #endif
  42 #define DEBUG_SUBSYSTEM S_LMV
  43 #ifdef __KERNEL__
  44 #include <linux/slab.h>
  45 #include <linux/module.h>
  46 #include <linux/init.h>
  47 #include <linux/slab.h>
  48 #include <linux/pagemap.h>
  49 #include <linux/mm.h>
  50 #include <asm/div64.h>
  51 #include <linux/seq_file.h>
  52 #include <linux/namei.h>
  53 #else
  54 #include <liblustre.h>
  55 #endif
  56
  57 #include <lustre_log.h>
  58 #include <obd_support.h>
  59 #include <lustre_lib.h>
  60 #include <lustre_net.h>
  61 #include <obd_class.h>
  62 #include <lprocfs_status.h>
  63 #include <lustre_lite.h>
  64 #include <lustre_fid.h>
  65 #include "lmv_internal.h"
  66
  67 /* object cache. */
  68 cfs_mem_cache_t *lmv_object_cache;
  69 cfs_atomic_t lmv_object_count = CFS_ATOMIC_INIT(0);
  70
  71 static void lmv_activate_target(struct lmv_obd *lmv,
  72                                 struct lmv_tgt_desc *tgt,
  73                                 int activate)
  74 {
  75         if (tgt->ltd_active == activate)
  76                 return;
  77
  78         tgt->ltd_active = activate;
  79         lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
  80 }
  81
  82 /**
  83  * Error codes:
  84  *
  85  *  -EINVAL  : UUID can't be found in the LMV's target list
  86  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
  87  *  -EBADF   : The UUID is found, but the OBD of the wrong type (!)
  88  */
  89 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
  90                               int activate)
  91 {
  92         struct lmv_tgt_desc    *tgt;
  93         struct obd_device      *obd;
  94         int                     i;
  95         int                     rc = 0;
  96         ENTRY;
  97
  98         CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
  99                lmv, uuid->uuid, activate);
 100
 101         cfs_spin_lock(&lmv->lmv_lock);
 102         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 103                 if (tgt->ltd_exp == NULL)
 104                         continue;
 105
 106                 CDEBUG(D_INFO, "Target idx %d is %s conn "LPX64"\n",
 107                        i, tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
 108
 109                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 110                         break;
 111         }
 112
 113         if (i == lmv->desc.ld_tgt_count)
 114                 GOTO(out_lmv_lock, rc = -EINVAL);
 115
 116         obd = class_exp2obd(tgt->ltd_exp);
 117         if (obd == NULL)
 118                 GOTO(out_lmv_lock, rc = -ENOTCONN);
 119
 120         CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
 121                obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
 122                obd->obd_type->typ_name, i);
 123         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
 124
 125         if (tgt->ltd_active == activate) {
 126                 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
 127                        activate ? "" : "in");
 128                 GOTO(out_lmv_lock, rc);
 129         }
 130
 131         CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
 132                activate ? "" : "in");
 133         lmv_activate_target(lmv, tgt, activate);
 134         EXIT;
 135
 136  out_lmv_lock:
 137         cfs_spin_unlock(&lmv->lmv_lock);
 138         return rc;
 139 }
 140
 141 static int lmv_set_mdc_data(struct lmv_obd *lmv, struct obd_uuid *uuid,
 142                             struct obd_connect_data *data)
 143 {
 144         struct lmv_tgt_desc    *tgt;
 145         int                     i;
 146         ENTRY;
 147
 148         LASSERT(data != NULL);
 149
 150         cfs_spin_lock(&lmv->lmv_lock);
 151         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 152                 if (tgt->ltd_exp == NULL)
 153                         continue;
 154
 155                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 156                         lmv->datas[tgt->ltd_idx] = *data;
 157                         break;
 158                 }
 159         }
 160         cfs_spin_unlock(&lmv->lmv_lock);
 161         RETURN(0);
 162 }
 163
 164 struct obd_uuid *lmv_get_uuid(struct obd_export *exp) {
 165         struct obd_device *obd = exp->exp_obd;
 166         struct lmv_obd *lmv = &obd->u.lmv;
 167         return obd_get_uuid(lmv->tgts[0].ltd_exp);
 168 }
 169
 170 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
 171                       enum obd_notify_event ev, void *data)
 172 {
 173         struct obd_connect_data *conn_data;
 174         struct lmv_obd          *lmv = &obd->u.lmv;
 175         struct obd_uuid         *uuid;
 176         int                      rc = 0;
 177         ENTRY;
 178
 179         if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 180                 CERROR("unexpected notification of %s %s!\n",
 181                        watched->obd_type->typ_name,
 182                        watched->obd_name);
 183                 RETURN(-EINVAL);
 184         }
 185
 186         uuid = &watched->u.cli.cl_target_uuid;
 187         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
 188                 /*
 189                  * Set MDC as active before notifying the observer, so the
 190                  * observer can use the MDC normally.
 191                  */
 192                 rc = lmv_set_mdc_active(lmv, uuid,
 193                                         ev == OBD_NOTIFY_ACTIVE);
 194                 if (rc) {
 195                         CERROR("%sactivation of %s failed: %d\n",
 196                                ev == OBD_NOTIFY_ACTIVE ? "" : "de",
 197                                uuid->uuid, rc);
 198                         RETURN(rc);
 199                 }
 200         } else if (ev == OBD_NOTIFY_OCD) {
 201                 conn_data = &watched->u.cli.cl_import->imp_connect_data;
 202
 203                 /*
 204                  * Set connect data to desired target, update exp_connect_flags.
 205                  */
 206                 rc = lmv_set_mdc_data(lmv, uuid, conn_data);
 207                 if (rc) {
 208                         CERROR("can't set connect data to target %s, rc %d\n",
 209                                uuid->uuid, rc);
 210                         RETURN(rc);
 211                 }
 212
 213                 /*
 214                  * XXX: Make sure that ocd_connect_flags from all targets are
 215                  * the same. Otherwise one of MDTs runs wrong version or
 216                  * something like this.  --umka
 217                  */
 218                 obd->obd_self_export->exp_connect_flags =
 219                         conn_data->ocd_connect_flags;
 220         }
 221 #if 0
 222         else if (ev == OBD_NOTIFY_DISCON) {
 223                 /*
 224                  * For disconnect event, flush fld cache for failout MDS case.
 225                  */
 226                 fld_client_flush(&lmv->lmv_fld);
 227         }
 228 #endif
 229         /*
 230          * Pass the notification up the chain.
 231          */
 232         if (obd->obd_observer)
 233                 rc = obd_notify(obd->obd_observer, watched, ev, data);
 234
 235         RETURN(rc);
 236 }
 237
 238 /**
 239  * This is fake connect function. Its purpose is to initialize lmv and say
 240  * caller that everything is okay. Real connection will be performed later.
 241  */
 242 static int lmv_connect(const struct lu_env *env,
 243                        struct obd_export **exp, struct obd_device *obd,
 244                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 245                        void *localdata)
 246 {
 247 #ifdef __KERNEL__
 248         struct proc_dir_entry *lmv_proc_dir;
 249 #endif
 250         struct lmv_obd        *lmv = &obd->u.lmv;
 251         struct lustre_handle  conn = { 0 };
 252         int                    rc = 0;
 253         ENTRY;
 254
 255         /*
 256          * We don't want to actually do the underlying connections more than
 257          * once, so keep track.
 258          */
 259         lmv->refcount++;
 260         if (lmv->refcount > 1) {
 261                 *exp = NULL;
 262                 RETURN(0);
 263         }
 264
 265         rc = class_connect(&conn, obd, cluuid);
 266         if (rc) {
 267                 CERROR("class_connection() returned %d\n", rc);
 268                 RETURN(rc);
 269         }
 270
 271         *exp = class_conn2export(&conn);
 272         class_export_get(*exp);
 273
 274         lmv->exp = *exp;
 275         lmv->connected = 0;
 276         lmv->cluuid = *cluuid;
 277
 278         if (data)
 279                 lmv->conn_data = *data;
 280
 281 #ifdef __KERNEL__
 282         lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
 283                                         NULL, NULL);
 284         if (IS_ERR(lmv_proc_dir)) {
 285                 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
 286                        obd->obd_type->typ_name, obd->obd_name);
 287                 lmv_proc_dir = NULL;
 288         }
 289 #endif
 290
 291         /*
 292          * All real clients should perform actual connection right away, because
 293          * it is possible, that LMV will not have opportunity to connect targets
 294          * and MDC stuff will be called directly, for instance while reading
 295          * ../mdc/../kbytesfree procfs file, etc.
 296          */
 297         if (data->ocd_connect_flags & OBD_CONNECT_REAL)
 298                 rc = lmv_check_connect(obd);
 299
 300 #ifdef __KERNEL__
 301         if (rc) {
 302                 if (lmv_proc_dir)
 303                         lprocfs_remove(&lmv_proc_dir);
 304         }
 305 #endif
 306
 307         RETURN(rc);
 308 }
 309
 310 static void lmv_set_timeouts(struct obd_device *obd)
 311 {
 312         struct lmv_tgt_desc   *tgts;
 313         struct lmv_obd        *lmv;
 314         int                    i;
 315
 316         lmv = &obd->u.lmv;
 317         if (lmv->server_timeout == 0)
 318                 return;
 319
 320         if (lmv->connected == 0)
 321                 return;
 322
 323         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 324                 if (tgts->ltd_exp == NULL)
 325                         continue;
 326
 327                 obd_set_info_async(tgts->ltd_exp, sizeof(KEY_INTERMDS),
 328                                    KEY_INTERMDS, 0, NULL, NULL);
 329         }
 330 }
 331
 332 static int lmv_init_ea_size(struct obd_export *exp, int easize,
 333                             int def_easize, int cookiesize)
 334 {
 335         struct obd_device   *obd = exp->exp_obd;
 336         struct lmv_obd      *lmv = &obd->u.lmv;
 337         int                  i;
 338         int                  rc = 0;
 339         int                  change = 0;
 340         ENTRY;
 341
 342         if (lmv->max_easize < easize) {
 343                 lmv->max_easize = easize;
 344                 change = 1;
 345         }
 346         if (lmv->max_def_easize < def_easize) {
 347                 lmv->max_def_easize = def_easize;
 348                 change = 1;
 349         }
 350         if (lmv->max_cookiesize < cookiesize) {
 351                 lmv->max_cookiesize = cookiesize;
 352                 change = 1;
 353         }
 354         if (change == 0)
 355                 RETURN(0);
 356
 357         if (lmv->connected == 0)
 358                 RETURN(0);
 359
 360         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 361                 if (lmv->tgts[i].ltd_exp == NULL) {
 362                         CWARN("%s: NULL export for %d\n", obd->obd_name, i);
 363                         continue;
 364                 }
 365
 366                 rc = md_init_ea_size(lmv->tgts[i].ltd_exp, easize, def_easize,
 367                                      cookiesize);
 368                 if (rc) {
 369                         CERROR("obd_init_ea_size() failed on MDT target %d, "
 370                                "error %d.\n", i, rc);
 371                         break;
 372                 }
 373         }
 374         RETURN(rc);
 375 }
 376
 377 #define MAX_STRING_SIZE 128
 378
 379 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 380 {
 381 #ifdef __KERNEL__
 382         struct proc_dir_entry   *lmv_proc_dir;
 383 #endif
 384         struct lmv_obd          *lmv = &obd->u.lmv;
 385         struct obd_uuid         *cluuid = &lmv->cluuid;
 386         struct obd_connect_data *mdc_data = NULL;
 387         struct obd_uuid          lmv_mdc_uuid = { "LMV_MDC_UUID" };
 388         struct obd_device       *mdc_obd;
 389         struct obd_export       *mdc_exp;
 390         struct lu_fld_target     target;
 391         int                      rc;
 392         ENTRY;
 393
 394         mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
 395                                         &obd->obd_uuid);
 396         if (!mdc_obd) {
 397                 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
 398                 RETURN(-EINVAL);
 399         }
 400
 401         CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
 402                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 403                 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
 404                 cluuid->uuid);
 405
 406         if (!mdc_obd->obd_set_up) {
 407                 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
 408                 RETURN(-EINVAL);
 409         }
 410
 411         rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
 412                          &lmv->conn_data, NULL);
 413         if (rc) {
 414                 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
 415                 RETURN(rc);
 416         }
 417
 418         /*
 419          * Init fid sequence client for this mdc and add new fld target.
 420          */
 421         rc = obd_fid_init(mdc_exp);
 422         if (rc)
 423                 RETURN(rc);
 424
 425         target.ft_srv = NULL;
 426         target.ft_exp = mdc_exp;
 427         target.ft_idx = tgt->ltd_idx;
 428
 429         fld_client_add_target(&lmv->lmv_fld, &target);
 430
 431         mdc_data = &class_exp2cliimp(mdc_exp)->imp_connect_data;
 432
 433         rc = obd_register_observer(mdc_obd, obd);
 434         if (rc) {
 435                 obd_disconnect(mdc_exp);
 436                 CERROR("target %s register_observer error %d\n",
 437                        tgt->ltd_uuid.uuid, rc);
 438                 RETURN(rc);
 439         }
 440
 441         if (obd->obd_observer) {
 442                 /*
 443                  * Tell the observer about the new target.
 444                  */
 445                 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
 446                                 OBD_NOTIFY_ACTIVE, (void *)(tgt - lmv->tgts));
 447                 if (rc) {
 448                         obd_disconnect(mdc_exp);
 449                         RETURN(rc);
 450                 }
 451         }
 452
 453         tgt->ltd_active = 1;
 454         tgt->ltd_exp = mdc_exp;
 455         lmv->desc.ld_active_tgt_count++;
 456
 457         /*
 458          * Copy connect data, it may be used later.
 459          */
 460         lmv->datas[tgt->ltd_idx] = *mdc_data;
 461
 462         md_init_ea_size(tgt->ltd_exp, lmv->max_easize,
 463                         lmv->max_def_easize, lmv->max_cookiesize);
 464
 465         CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
 466                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 467                 cfs_atomic_read(&obd->obd_refcount));
 468
 469 #ifdef __KERNEL__
 470         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 471         if (lmv_proc_dir) {
 472                 struct proc_dir_entry *mdc_symlink;
 473
 474                 LASSERT(mdc_obd->obd_type != NULL);
 475                 LASSERT(mdc_obd->obd_type->typ_name != NULL);
 476                 mdc_symlink = lprocfs_add_symlink(mdc_obd->obd_name,
 477                                                   lmv_proc_dir,
 478                                                   "../../../%s/%s",
 479                                                   mdc_obd->obd_type->typ_name,
 480                                                   mdc_obd->obd_name);
 481                 if (mdc_symlink == NULL) {
 482                         CERROR("Could not register LMV target "
 483                                "/proc/fs/lustre/%s/%s/target_obds/%s.",
 484                                obd->obd_type->typ_name, obd->obd_name,
 485                                mdc_obd->obd_name);
 486                         lprocfs_remove(&lmv_proc_dir);
 487                         lmv_proc_dir = NULL;
 488                 }
 489         }
 490 #endif
 491         RETURN(0);
 492 }
 493
 494 int lmv_add_target(struct obd_device *obd, struct obd_uuid *tgt_uuid)
 495 {
 496         struct lmv_obd      *lmv = &obd->u.lmv;
 497         struct lmv_tgt_desc *tgt;
 498         int                  rc = 0;
 499         ENTRY;
 500
 501         CDEBUG(D_CONFIG, "Target uuid: %s.\n", tgt_uuid->uuid);
 502
 503         lmv_init_lock(lmv);
 504
 505         if (lmv->desc.ld_active_tgt_count >= LMV_MAX_TGT_COUNT) {
 506                 lmv_init_unlock(lmv);
 507                 CERROR("Can't add %s, LMV module compiled for %d MDCs. "
 508                        "That many MDCs already configured.\n",
 509                        tgt_uuid->uuid, LMV_MAX_TGT_COUNT);
 510                 RETURN(-EINVAL);
 511         }
 512         if (lmv->desc.ld_tgt_count == 0) {
 513                 struct obd_device *mdc_obd;
 514
 515                 mdc_obd = class_find_client_obd(tgt_uuid, LUSTRE_MDC_NAME,
 516                                                 &obd->obd_uuid);
 517                 if (!mdc_obd) {
 518                         lmv_init_unlock(lmv);
 519                         CERROR("Target %s not attached\n", tgt_uuid->uuid);
 520                         RETURN(-EINVAL);
 521                 }
 522
 523                 rc = obd_llog_init(obd, &obd->obd_olg, mdc_obd, NULL);
 524                 if (rc) {
 525                         lmv_init_unlock(lmv);
 526                         CERROR("lmv failed to setup llogging subsystems\n");
 527                 }
 528         }
 529         cfs_spin_lock(&lmv->lmv_lock);
 530         tgt = lmv->tgts + lmv->desc.ld_tgt_count++;
 531         tgt->ltd_uuid = *tgt_uuid;
 532         cfs_spin_unlock(&lmv->lmv_lock);
 533
 534         if (lmv->connected) {
 535                 rc = lmv_connect_mdc(obd, tgt);
 536                 if (rc) {
 537                         cfs_spin_lock(&lmv->lmv_lock);
 538                         lmv->desc.ld_tgt_count--;
 539                         memset(tgt, 0, sizeof(*tgt));
 540                         cfs_spin_unlock(&lmv->lmv_lock);
 541                 } else {
 542                         int easize = sizeof(struct lmv_stripe_md) +
 543                                      lmv->desc.ld_tgt_count *
 544                                      sizeof(struct lu_fid);
 545                         lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
 546                 }
 547         }
 548
 549         lmv_init_unlock(lmv);
 550         RETURN(rc);
 551 }
 552
 553 int lmv_check_connect(struct obd_device *obd)
 554 {
 555         struct lmv_obd       *lmv = &obd->u.lmv;
 556         struct lmv_tgt_desc  *tgt;
 557         int                   i;
 558         int                   rc;
 559         int                   easize;
 560         ENTRY;
 561
 562         if (lmv->connected)
 563                 RETURN(0);
 564
 565         lmv_init_lock(lmv);
 566         if (lmv->connected) {
 567                 lmv_init_unlock(lmv);
 568                 RETURN(0);
 569         }
 570
 571         if (lmv->desc.ld_tgt_count == 0) {
 572                 lmv_init_unlock(lmv);
 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_mutex_lock(&tgt->ltd_fid_mutex);
 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_mutex_unlock(&tgt->ltd_fid_mutex);
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 = 0;
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_mutex_init(&lmv->tgts[i].ltd_fid_mutex);
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_mutex_init(&lmv->init_mutex);
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",
1114                                         0444, &lmv_proc_target_fops, obd);
1115                 if (rc)
1116                         CWARN("%s: error adding LMV target_obd file: rc = %d\n",
1117                                obd->obd_name, rc);
1118        }
1119 #endif
1120         rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1121                              LUSTRE_CLI_FLD_HASH_DHT);
1122         if (rc) {
1123                 CERROR("Can't init FLD, err %d\n", rc);
1124                 GOTO(out_free_datas, rc);
1125         }
1126
1127         RETURN(0);
1128
1129 out_free_datas:
1130         OBD_FREE(lmv->datas, lmv->datas_size);
1131         lmv->datas = NULL;
1132 out_free_tgts:
1133         OBD_FREE(lmv->tgts, lmv->tgts_size);
1134         lmv->tgts = NULL;
1135         return rc;
1136 }
1137
1138 static int lmv_cleanup(struct obd_device *obd)
1139 {
1140         struct lmv_obd   *lmv = &obd->u.lmv;
1141         ENTRY;
1142
1143         fld_client_fini(&lmv->lmv_fld);
1144         lmv_object_cleanup(obd);
1145         OBD_FREE(lmv->datas, lmv->datas_size);
1146         OBD_FREE(lmv->tgts, lmv->tgts_size);
1147
1148         RETURN(0);
1149 }
1150
1151 static int lmv_process_config(struct obd_device *obd, obd_count len, void *buf)
1152 {
1153         struct lustre_cfg     *lcfg = buf;
1154         struct obd_uuid        tgt_uuid;
1155         int                    rc;
1156         ENTRY;
1157
1158         switch(lcfg->lcfg_command) {
1159         case LCFG_ADD_MDC:
1160                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(tgt_uuid.uuid))
1161                         GOTO(out, rc = -EINVAL);
1162
1163                 obd_str2uuid(&tgt_uuid, lustre_cfg_string(lcfg, 1));
1164                 rc = lmv_add_target(obd, &tgt_uuid);
1165                 GOTO(out, rc);
1166         default: {
1167                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1168                 GOTO(out, rc = -EINVAL);
1169         }
1170         }
1171 out:
1172         RETURN(rc);
1173 }
1174
1175 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1176                       __u64 max_age, __u32 flags)
1177 {
1178         struct lmv_obd        *lmv = &obd->u.lmv;
1179         struct obd_statfs     *temp;
1180         int                    rc = 0;
1181         int                    i;
1182         ENTRY;
1183
1184         rc = lmv_check_connect(obd);
1185         if (rc)
1186                 RETURN(rc);
1187
1188         OBD_ALLOC(temp, sizeof(*temp));
1189         if (temp == NULL)
1190                 RETURN(-ENOMEM);
1191
1192         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1193                 if (lmv->tgts[i].ltd_exp == NULL)
1194                         continue;
1195
1196                 rc = obd_statfs(lmv->tgts[i].ltd_exp->exp_obd, temp,
1197                                 max_age, flags);
1198                 if (rc) {
1199                         CERROR("can't stat MDS #%d (%s), error %d\n", i,
1200                                lmv->tgts[i].ltd_exp->exp_obd->obd_name,
1201                                rc);
1202                         GOTO(out_free_temp, rc);
1203                 }
1204                 if (i == 0) {
1205                         *osfs = *temp;
1206                 } else {
1207                         osfs->os_bavail += temp->os_bavail;
1208                         osfs->os_blocks += temp->os_blocks;
1209                         osfs->os_ffree += temp->os_ffree;
1210                         osfs->os_files += temp->os_files;
1211                 }
1212         }
1213
1214         EXIT;
1215 out_free_temp:
1216         OBD_FREE(temp, sizeof(*temp));
1217         return rc;
1218 }
1219
1220 static int lmv_getstatus(struct obd_export *exp,
1221                          struct lu_fid *fid,
1222                          struct obd_capa **pc)
1223 {
1224         struct obd_device    *obd = exp->exp_obd;
1225         struct lmv_obd       *lmv = &obd->u.lmv;
1226         int                   rc;
1227         ENTRY;
1228
1229         rc = lmv_check_connect(obd);
1230         if (rc)
1231                 RETURN(rc);
1232
1233         rc = md_getstatus(lmv->tgts[0].ltd_exp, fid, pc);
1234         RETURN(rc);
1235 }
1236
1237 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1238                         struct obd_capa *oc, obd_valid valid, const char *name,
1239                         const char *input, int input_size, int output_size,
1240                         int flags, struct ptlrpc_request **request)
1241 {
1242         struct obd_device      *obd = exp->exp_obd;
1243         struct lmv_obd         *lmv = &obd->u.lmv;
1244         struct lmv_tgt_desc    *tgt;
1245         int                     rc;
1246         ENTRY;
1247
1248         rc = lmv_check_connect(obd);
1249         if (rc)
1250                 RETURN(rc);
1251
1252         tgt = lmv_find_target(lmv, fid);
1253         if (IS_ERR(tgt))
1254                 RETURN(PTR_ERR(tgt));
1255
1256         rc = md_getxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1257                          input_size, output_size, flags, request);
1258
1259         RETURN(rc);
1260 }
1261
1262 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1263                         struct obd_capa *oc, obd_valid valid, const char *name,
1264                         const char *input, int input_size, int output_size,
1265                         int flags, __u32 suppgid,
1266                         struct ptlrpc_request **request)
1267 {
1268         struct obd_device      *obd = exp->exp_obd;
1269         struct lmv_obd         *lmv = &obd->u.lmv;
1270         struct lmv_tgt_desc    *tgt;
1271         int                     rc;
1272         ENTRY;
1273
1274         rc = lmv_check_connect(obd);
1275         if (rc)
1276                 RETURN(rc);
1277
1278         tgt = lmv_find_target(lmv, fid);
1279         if (IS_ERR(tgt))
1280                 RETURN(PTR_ERR(tgt));
1281
1282         rc = md_setxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1283                          input_size, output_size, flags, suppgid,
1284                          request);
1285
1286         RETURN(rc);
1287 }
1288
1289 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1290                        struct ptlrpc_request **request)
1291 {
1292         struct obd_device       *obd = exp->exp_obd;
1293         struct lmv_obd          *lmv = &obd->u.lmv;
1294         struct lmv_tgt_desc     *tgt;
1295         struct lmv_object       *obj;
1296         int                      rc;
1297         int                      i;
1298         ENTRY;
1299
1300         rc = lmv_check_connect(obd);
1301         if (rc)
1302                 RETURN(rc);
1303
1304         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1305         if (IS_ERR(tgt))
1306                 RETURN(PTR_ERR(tgt));
1307
1308         if (op_data->op_valid & OBD_MD_MDTIDX) {
1309                 op_data->op_mds = tgt->ltd_idx;
1310                 RETURN(0);
1311         }
1312
1313         rc = md_getattr(tgt->ltd_exp, op_data, request);
1314         if (rc)
1315                 RETURN(rc);
1316
1317         obj = lmv_object_find_lock(obd, &op_data->op_fid1);
1318
1319         CDEBUG(D_INODE, "GETATTR for "DFID" %s\n", PFID(&op_data->op_fid1),
1320                obj ? "(split)" : "");
1321
1322         /*
1323          * If object is split, then we loop over all the slaves and gather size
1324          * attribute. In ideal world we would have to gather also mds field from
1325          * all slaves, as object is spread over the cluster and this is
1326          * definitely interesting information and it is not good to loss it,
1327          * but...
1328          */
1329         if (obj) {
1330                 struct mdt_body *body;
1331
1332                 if (*request == NULL) {
1333                         lmv_object_put(obj);
1334                         RETURN(rc);
1335                 }
1336
1337                 body = req_capsule_server_get(&(*request)->rq_pill,
1338                                               &RMF_MDT_BODY);
1339                 LASSERT(body != NULL);
1340
1341                 for (i = 0; i < obj->lo_objcount; i++) {
1342                         if (lmv->tgts[i].ltd_exp == NULL) {
1343                                 CWARN("%s: NULL export for %d\n",
1344                                       obd->obd_name, i);
1345                                 continue;
1346                         }
1347
1348                         /*
1349                          * Skip master object.
1350                          */
1351                         if (lu_fid_eq(&obj->lo_fid, &obj->lo_stripes[i].ls_fid))
1352                                 continue;
1353
1354                         body->size += obj->lo_stripes[i].ls_size;
1355                 }
1356
1357                 lmv_object_put_unlock(obj);
1358         }
1359
1360         RETURN(rc);
1361 }
1362
1363 static int lmv_change_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1364                              ldlm_iterator_t it, void *data)
1365 {
1366         struct obd_device   *obd = exp->exp_obd;
1367         struct lmv_obd      *lmv = &obd->u.lmv;
1368         int                  i;
1369         int                  rc;
1370         ENTRY;
1371
1372         rc = lmv_check_connect(obd);
1373         if (rc)
1374                 RETURN(rc);
1375
1376         CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1377
1378         /*
1379          * With CMD every object can have two locks in different namespaces:
1380          * lookup lock in space of mds storing direntry and update/open lock in
1381          * space of mds storing inode.
1382          */
1383         for (i = 0; i < lmv->desc.ld_tgt_count; i++)
1384                 md_change_cbdata(lmv->tgts[i].ltd_exp, fid, it, data);
1385
1386         RETURN(0);
1387 }
1388
1389 static int lmv_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1390                            ldlm_iterator_t it, void *data)
1391 {
1392         struct obd_device   *obd = exp->exp_obd;
1393         struct lmv_obd      *lmv = &obd->u.lmv;
1394         int                  i;
1395         int                  rc;
1396         ENTRY;
1397
1398         rc = lmv_check_connect(obd);
1399         if (rc)
1400                 RETURN(rc);
1401
1402         CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1403
1404         /*
1405          * With CMD every object can have two locks in different namespaces:
1406          * lookup lock in space of mds storing direntry and update/open lock in
1407          * space of mds storing inode.
1408          */
1409         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1410                 rc = md_find_cbdata(lmv->tgts[i].ltd_exp, fid, it, data);
1411                 if (rc)
1412                         RETURN(rc);
1413         }
1414
1415         RETURN(rc);
1416 }
1417
1418
1419 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1420                      struct md_open_data *mod, struct ptlrpc_request **request)
1421 {
1422         struct obd_device     *obd = exp->exp_obd;
1423         struct lmv_obd        *lmv = &obd->u.lmv;
1424         struct lmv_tgt_desc   *tgt;
1425         int                    rc;
1426         ENTRY;
1427
1428         rc = lmv_check_connect(obd);
1429         if (rc)
1430                 RETURN(rc);
1431
1432         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1433         if (IS_ERR(tgt))
1434                 RETURN(PTR_ERR(tgt));
1435
1436         CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1437         rc = md_close(tgt->ltd_exp, op_data, mod, request);
1438         RETURN(rc);
1439 }
1440
1441 /**
1442  * Called in the case MDS returns -ERESTART on create on open, what means that
1443  * directory is split and its LMV presentation object has to be updated.
1444  */
1445 int lmv_handle_split(struct obd_export *exp, const struct lu_fid *fid)
1446 {
1447         struct obd_device       *obd = exp->exp_obd;
1448         struct lmv_obd          *lmv = &obd->u.lmv;
1449         struct ptlrpc_request   *req = NULL;
1450         struct lmv_tgt_desc     *tgt;
1451         struct lmv_object       *obj;
1452         struct lustre_md         md;
1453         struct md_op_data       *op_data;
1454         int                      mealen;
1455         int                      rc;
1456         __u64                    valid;
1457         ENTRY;
1458
1459         md.mea = NULL;
1460         mealen = lmv_get_easize(lmv);
1461
1462         valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA | OBD_MD_MEA;
1463
1464         tgt = lmv_find_target(lmv, fid);
1465         if (IS_ERR(tgt))
1466                 RETURN(PTR_ERR(tgt));
1467
1468         /*
1469          * Time to update mea of parent fid.
1470          */
1471
1472         OBD_ALLOC_PTR(op_data);
1473         if (op_data == NULL)
1474                 RETURN(-ENOMEM);
1475
1476         op_data->op_fid1 = *fid;
1477         op_data->op_mode = mealen;
1478         op_data->op_valid = valid;
1479
1480         rc = md_getattr(tgt->ltd_exp, op_data, &req);
1481         OBD_FREE_PTR(op_data);
1482         if (rc) {
1483                 CERROR("md_getattr() failed, error %d\n", rc);
1484                 GOTO(cleanup, rc);
1485         }
1486
1487         rc = md_get_lustre_md(tgt->ltd_exp, req, NULL, exp, &md);
1488         if (rc) {
1489                 CERROR("md_get_lustre_md() failed, error %d\n", rc);
1490                 GOTO(cleanup, rc);
1491         }
1492
1493         if (md.mea == NULL)
1494                 GOTO(cleanup, rc = -ENODATA);
1495
1496         obj = lmv_object_create(exp, fid, md.mea);
1497         if (IS_ERR(obj))
1498                 rc = PTR_ERR(obj);
1499         else
1500                 lmv_object_put(obj);
1501
1502         obd_free_memmd(exp, (void *)&md.mea);
1503         EXIT;
1504 cleanup:
1505         if (req)
1506                 ptlrpc_req_finished(req);
1507         return rc;
1508 }
1509
1510 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1511                const void *data, int datalen, int mode, __u32 uid,
1512                __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1513                struct ptlrpc_request **request)
1514 {
1515         struct obd_device       *obd = exp->exp_obd;
1516         struct lmv_obd          *lmv = &obd->u.lmv;
1517         struct lmv_tgt_desc     *tgt;
1518         struct lmv_object       *obj;
1519         int                      rc;
1520         int                      loop = 0;
1521         int                      sidx;
1522         ENTRY;
1523
1524         rc = lmv_check_connect(obd);
1525         if (rc)
1526                 RETURN(rc);
1527
1528         if (!lmv->desc.ld_active_tgt_count)
1529                 RETURN(-EIO);
1530 repeat:
1531         ++loop;
1532         LASSERT(loop <= 2);
1533
1534         obj = lmv_object_find(obd, &op_data->op_fid1);
1535         if (obj) {
1536                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1537                                        op_data->op_name, op_data->op_namelen);
1538                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1539                 op_data->op_bias &= ~MDS_CHECK_SPLIT;
1540                 op_data->op_mds = obj->lo_stripes[sidx].ls_mds;
1541                 tgt = lmv_get_target(lmv, op_data->op_mds);
1542                 lmv_object_put(obj);
1543         } else {
1544                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1545                 op_data->op_bias |= MDS_CHECK_SPLIT;
1546                 op_data->op_mds = tgt->ltd_idx;
1547         }
1548
1549         if (IS_ERR(tgt))
1550                 RETURN(PTR_ERR(tgt));
1551
1552         rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
1553         if (rc == -ERESTART)
1554                 goto repeat;
1555         else if (rc)
1556                 RETURN(rc);
1557
1558         CDEBUG(D_INODE, "CREATE '%*s' on "DFID" -> mds #%x\n",
1559                op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1560                op_data->op_mds);
1561
1562         op_data->op_flags |= MF_MDC_CANCEL_FID1;
1563         rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1564                        cap_effective, rdev, request);
1565         if (rc == 0) {
1566                 if (*request == NULL)
1567                         RETURN(rc);
1568                 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1569         } else if (rc == -ERESTART) {
1570                 LASSERT(*request != NULL);
1571                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1572                           "Got -ERESTART during create!\n");
1573                 ptlrpc_req_finished(*request);
1574                 *request = NULL;
1575
1576                 /*
1577                  * Directory got split. Time to update local object and repeat
1578                  * the request with proper MDS.
1579                  */
1580                 rc = lmv_handle_split(exp, &op_data->op_fid1);
1581                 if (rc == 0) {
1582                         rc = lmv_allocate_slaves(obd, &op_data->op_fid1,
1583                                                  op_data, &op_data->op_fid2);
1584                         if (rc)
1585                                 RETURN(rc);
1586                         goto repeat;
1587                 }
1588         }
1589         RETURN(rc);
1590 }
1591
1592 static int lmv_done_writing(struct obd_export *exp,
1593                             struct md_op_data *op_data,
1594                             struct md_open_data *mod)
1595 {
1596         struct obd_device     *obd = exp->exp_obd;
1597         struct lmv_obd        *lmv = &obd->u.lmv;
1598         struct lmv_tgt_desc   *tgt;
1599         int                    rc;
1600         ENTRY;
1601
1602         rc = lmv_check_connect(obd);
1603         if (rc)
1604                 RETURN(rc);
1605
1606         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1607         if (IS_ERR(tgt))
1608                 RETURN(PTR_ERR(tgt));
1609
1610         rc = md_done_writing(tgt->ltd_exp, op_data, mod);
1611         RETURN(rc);
1612 }
1613
1614 static int
1615 lmv_enqueue_slaves(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1616                    struct lookup_intent *it, struct md_op_data *op_data,
1617                    struct lustre_handle *lockh, void *lmm, int lmmsize)
1618 {
1619         struct obd_device     *obd = exp->exp_obd;
1620         struct lmv_obd        *lmv = &obd->u.lmv;
1621         struct lmv_stripe_md  *mea = op_data->op_mea1;
1622         struct md_op_data     *op_data2;
1623         struct lmv_tgt_desc   *tgt;
1624         int                    i;
1625         int                    rc = 0;
1626         ENTRY;
1627
1628         OBD_ALLOC_PTR(op_data2);
1629         if (op_data2 == NULL)
1630                 RETURN(-ENOMEM);
1631
1632         LASSERT(mea != NULL);
1633         for (i = 0; i < mea->mea_count; i++) {
1634                 memset(op_data2, 0, sizeof(*op_data2));
1635                 op_data2->op_fid1 = mea->mea_ids[i];
1636                 op_data2->op_bias = 0;
1637
1638                 tgt = lmv_find_target(lmv, &op_data2->op_fid1);
1639                 if (IS_ERR(tgt))
1640                         GOTO(cleanup, rc = PTR_ERR(tgt));
1641
1642                 if (tgt->ltd_exp == NULL)
1643                         continue;
1644
1645                 rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data2,
1646                                 lockh + i, lmm, lmmsize, NULL, 0);
1647
1648                 CDEBUG(D_INODE, "Take lock on slave "DFID" -> %d/%d\n",
1649                        PFID(&mea->mea_ids[i]), rc, it->d.lustre.it_status);
1650
1651                 if (rc)
1652                         GOTO(cleanup, rc);
1653
1654                 if (it->d.lustre.it_data) {
1655                         struct ptlrpc_request *req;
1656                         req = (struct ptlrpc_request *)it->d.lustre.it_data;
1657                         ptlrpc_req_finished(req);
1658                 }
1659
1660                 if (it->d.lustre.it_status)
1661                         GOTO(cleanup, rc = it->d.lustre.it_status);
1662         }
1663
1664         EXIT;
1665 cleanup:
1666         OBD_FREE_PTR(op_data2);
1667
1668         if (rc != 0) {
1669                 /*
1670                  * Drop all taken locks.
1671                  */
1672                 while (--i >= 0) {
1673                         if (lockh[i].cookie)
1674                                 ldlm_lock_decref(lockh + i, einfo->ei_mode);
1675                         lockh[i].cookie = 0;
1676                 }
1677         }
1678         return rc;
1679 }
1680
1681 static int
1682 lmv_enqueue_remote(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1683                    struct lookup_intent *it, struct md_op_data *op_data,
1684                    struct lustre_handle *lockh, void *lmm, int lmmsize,
1685                    int extra_lock_flags)
1686 {
1687         struct ptlrpc_request      *req = it->d.lustre.it_data;
1688         struct obd_device          *obd = exp->exp_obd;
1689         struct lmv_obd             *lmv = &obd->u.lmv;
1690         struct lustre_handle        plock;
1691         struct lmv_tgt_desc        *tgt;
1692         struct md_op_data          *rdata;
1693         struct lu_fid               fid1;
1694         struct mdt_body            *body;
1695         int                         rc = 0;
1696         int                         pmode;
1697         ENTRY;
1698
1699         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1700         LASSERT(body != NULL);
1701
1702         if (!(body->valid & OBD_MD_MDS))
1703                 RETURN(0);
1704
1705         CDEBUG(D_INODE, "REMOTE_ENQUEUE '%s' on "DFID" -> "DFID"\n",
1706                LL_IT2STR(it), PFID(&op_data->op_fid1), PFID(&body->fid1));
1707
1708         /*
1709          * We got LOOKUP lock, but we really need attrs.
1710          */
1711         pmode = it->d.lustre.it_lock_mode;
1712         LASSERT(pmode != 0);
1713         memcpy(&plock, lockh, sizeof(plock));
1714         it->d.lustre.it_lock_mode = 0;
1715         it->d.lustre.it_data = NULL;
1716         fid1 = body->fid1;
1717
1718         it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
1719         ptlrpc_req_finished(req);
1720
1721         tgt = lmv_find_target(lmv, &fid1);
1722         if (IS_ERR(tgt))
1723                 GOTO(out, rc = PTR_ERR(tgt));
1724
1725         OBD_ALLOC_PTR(rdata);
1726         if (rdata == NULL)
1727                 GOTO(out, rc = -ENOMEM);
1728
1729         rdata->op_fid1 = fid1;
1730         rdata->op_bias = MDS_CROSS_REF;
1731
1732         rc = md_enqueue(tgt->ltd_exp, einfo, it, rdata, lockh,
1733                         lmm, lmmsize, NULL, extra_lock_flags);
1734         OBD_FREE_PTR(rdata);
1735         EXIT;
1736 out:
1737         ldlm_lock_decref(&plock, pmode);
1738         return rc;
1739 }
1740
1741 static int
1742 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1743             struct lookup_intent *it, struct md_op_data *op_data,
1744             struct lustre_handle *lockh, void *lmm, int lmmsize,
1745             struct ptlrpc_request **req, int extra_lock_flags)
1746 {
1747         struct obd_device        *obd = exp->exp_obd;
1748         struct lmv_obd           *lmv = &obd->u.lmv;
1749         struct lmv_tgt_desc      *tgt;
1750         struct lmv_object        *obj;
1751         int                       sidx;
1752         int                       rc;
1753         ENTRY;
1754
1755         rc = lmv_check_connect(obd);
1756         if (rc)
1757                 RETURN(rc);
1758
1759         CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
1760                LL_IT2STR(it), PFID(&op_data->op_fid1));
1761
1762         if (op_data->op_mea1 && it && it->it_op == IT_UNLINK) {
1763                 rc = lmv_enqueue_slaves(exp, einfo, it, op_data,
1764                                         lockh, lmm, lmmsize);
1765                 RETURN(rc);
1766         }
1767
1768         obj = lmv_object_find(obd, &op_data->op_fid1);
1769         if (obj && op_data->op_namelen) {
1770                 sidx = raw_name2idx(obj->lo_hashtype,
1771                                        obj->lo_objcount,
1772                                        (char *)op_data->op_name,
1773                                        op_data->op_namelen);
1774                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1775                 tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
1776         } else {
1777                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1778         }
1779         if (obj)
1780                 lmv_object_put(obj);
1781
1782         if (IS_ERR(tgt))
1783                 RETURN(PTR_ERR(tgt));
1784
1785         CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%d\n",
1786                LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
1787
1788         rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data, lockh,
1789                         lmm, lmmsize, req, extra_lock_flags);
1790
1791         if (rc == 0 && it && it->it_op == IT_OPEN) {
1792                 rc = lmv_enqueue_remote(exp, einfo, it, op_data, lockh,
1793                                         lmm, lmmsize, extra_lock_flags);
1794         }
1795         RETURN(rc);
1796 }
1797
1798 static int
1799 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1800                  struct ptlrpc_request **request)
1801 {
1802         struct ptlrpc_request   *req = NULL;
1803         struct obd_device       *obd = exp->exp_obd;
1804         struct lmv_obd          *lmv = &obd->u.lmv;
1805         struct lu_fid            rid = op_data->op_fid1;
1806         struct lmv_tgt_desc     *tgt;
1807         struct mdt_body         *body;
1808         struct lmv_object       *obj;
1809         obd_valid                valid = op_data->op_valid;
1810         int                      rc;
1811         int                      loop = 0;
1812         int                      sidx;
1813         ENTRY;
1814
1815         rc = lmv_check_connect(obd);
1816         if (rc)
1817                 RETURN(rc);
1818
1819 repeat:
1820         ++loop;
1821         LASSERT(loop <= 2);
1822         obj = lmv_object_find(obd, &rid);
1823         if (obj) {
1824                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1825                                     op_data->op_name, op_data->op_namelen);
1826                 rid = obj->lo_stripes[sidx].ls_fid;
1827                 tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
1828                 op_data->op_mds = obj->lo_stripes[sidx].ls_mds;
1829                 valid &= ~OBD_MD_FLCKSPLIT;
1830                 lmv_object_put(obj);
1831         } else {
1832                 tgt = lmv_find_target(lmv, &rid);
1833                 valid |= OBD_MD_FLCKSPLIT;
1834                 op_data->op_mds = tgt->ltd_idx;
1835         }
1836         if (IS_ERR(tgt))
1837                 RETURN(PTR_ERR(tgt));
1838
1839         CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" - "DFID" -> mds #%d\n",
1840                op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1841                PFID(&rid), tgt->ltd_idx);
1842
1843         op_data->op_valid = valid;
1844         op_data->op_fid1 = rid;
1845         rc = md_getattr_name(tgt->ltd_exp, op_data, request);
1846         if (rc == 0) {
1847                 body = req_capsule_server_get(&(*request)->rq_pill,
1848                                               &RMF_MDT_BODY);
1849                 LASSERT(body != NULL);
1850
1851                 if (body->valid & OBD_MD_MDS) {
1852                         rid = body->fid1;
1853                         CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1854                                PFID(&rid));
1855
1856                         tgt = lmv_find_target(lmv, &rid);
1857                         if (IS_ERR(tgt)) {
1858                                 ptlrpc_req_finished(*request);
1859                                 RETURN(PTR_ERR(tgt));
1860                         }
1861
1862                         op_data->op_fid1 = rid;
1863                         op_data->op_valid |= OBD_MD_FLCROSSREF;
1864                         op_data->op_namelen = 0;
1865                         op_data->op_name = NULL;
1866                         rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
1867                         ptlrpc_req_finished(*request);
1868                         *request = req;
1869                 }
1870         } else if (rc == -ERESTART) {
1871                 LASSERT(*request != NULL);
1872                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1873                           "Got -ERESTART during getattr!\n");
1874                 ptlrpc_req_finished(*request);
1875                 *request = NULL;
1876
1877                 /*
1878                  * Directory got split. Time to update local object and repeat
1879                  * the request with proper MDS.
1880                  */
1881                 rc = lmv_handle_split(exp, &rid);
1882                 if (rc == 0)
1883                         goto repeat;
1884         }
1885         RETURN(rc);
1886 }
1887
1888 #define md_op_data_fid(op_data, fl)                     \
1889         (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1890          fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1891          fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1892          fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1893          NULL)
1894
1895 static int lmv_early_cancel_slaves(struct obd_export *exp,
1896                                    struct md_op_data *op_data, int op_tgt,
1897                                    ldlm_mode_t mode, int bits, int flag)
1898 {
1899         struct obd_device      *obd = exp->exp_obd;
1900         struct lmv_obd         *lmv = &obd->u.lmv;
1901         ldlm_policy_data_t      policy = {{0}};
1902         struct lu_fid          *op_fid;
1903         struct lu_fid          *st_fid;
1904         struct lmv_tgt_desc    *tgt;
1905         struct lmv_object      *obj;
1906         int                     rc = 0;
1907         int                     i;
1908         ENTRY;
1909
1910         op_fid = md_op_data_fid(op_data, flag);
1911         if (!fid_is_sane(op_fid))
1912                 RETURN(0);
1913
1914         obj = lmv_object_find(obd, op_fid);
1915         if (obj == NULL)
1916                 RETURN(-EALREADY);
1917
1918         policy.l_inodebits.bits = bits;
1919         for (i = 0; i < obj->lo_objcount; i++) {
1920                 tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
1921                 st_fid = &obj->lo_stripes[i].ls_fid;
1922                 if (op_tgt != tgt->ltd_idx) {
1923                         CDEBUG(D_INODE, "EARLY_CANCEL slave "DFID" -> mds #%d\n",
1924                                PFID(st_fid), tgt->ltd_idx);
1925                         rc = md_cancel_unused(tgt->ltd_exp, st_fid, &policy,
1926                                               mode, LCF_ASYNC, NULL);
1927                         if (rc)
1928                                 GOTO(out_put_obj, rc);
1929                 } else {
1930                         CDEBUG(D_INODE,
1931                                "EARLY_CANCEL skip operation target %d on "DFID"\n",
1932                                op_tgt, PFID(st_fid));
1933                         /*
1934                          * Do not cancel locks for operation target, they will
1935                          * be handled later in underlaying layer when calling
1936                          * function we run on behalf of.
1937                          */
1938                         *op_fid = *st_fid;
1939                         op_data->op_flags |= flag;
1940                 }
1941         }
1942         EXIT;
1943 out_put_obj:
1944         lmv_object_put(obj);
1945         return rc;
1946 }
1947
1948 static int lmv_early_cancel(struct obd_export *exp, struct md_op_data *op_data,
1949                             int op_tgt, ldlm_mode_t mode, int bits, int flag)
1950 {
1951         struct lu_fid          *fid = md_op_data_fid(op_data, flag);
1952         struct obd_device      *obd = exp->exp_obd;
1953         struct lmv_obd         *lmv = &obd->u.lmv;
1954         struct lmv_tgt_desc    *tgt;
1955         ldlm_policy_data_t      policy = {{0}};
1956         struct lmv_object      *obj;
1957         int                     rc = 0;
1958         ENTRY;
1959
1960         if (!fid_is_sane(fid))
1961                 RETURN(0);
1962
1963         obj = lmv_object_find(obd, fid);
1964         if (obj) {
1965                 rc = lmv_early_cancel_slaves(exp, op_data, op_tgt, mode,
1966                                              bits, flag);
1967                 lmv_object_put(obj);
1968         } else {
1969                 tgt = lmv_find_target(lmv, fid);
1970                 if (IS_ERR(tgt))
1971                         RETURN(PTR_ERR(tgt));
1972
1973                 if (tgt->ltd_idx != op_tgt) {
1974                         CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1975                         policy.l_inodebits.bits = bits;
1976                         rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1977                                               mode, LCF_ASYNC, NULL);
1978                 } else {
1979                         CDEBUG(D_INODE,
1980                                "EARLY_CANCEL skip operation target %d on "DFID"\n",
1981                                op_tgt, PFID(fid));
1982                         op_data->op_flags |= flag;
1983                         rc = 0;
1984                 }
1985
1986         }
1987         RETURN(rc);
1988 }
1989
1990 /*
1991  * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1992  * op_data->op_fid2
1993  */
1994 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1995                     struct ptlrpc_request **request)
1996 {
1997         struct obd_device       *obd = exp->exp_obd;
1998         struct lmv_obd          *lmv = &obd->u.lmv;
1999         struct lmv_tgt_desc     *tgt;
2000         struct lmv_object       *obj;
2001         int                      rc;
2002         int                      loop = 0;
2003         mdsno_t                  mds;
2004         int                      sidx;
2005         ENTRY;
2006
2007         rc = lmv_check_connect(obd);
2008         if (rc)
2009                 RETURN(rc);
2010
2011 repeat:
2012         ++loop;
2013         LASSERT(loop <= 2);
2014         LASSERT(op_data->op_namelen != 0);
2015
2016         CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
2017                PFID(&op_data->op_fid2), op_data->op_namelen,
2018                op_data->op_name, PFID(&op_data->op_fid1));
2019
2020         obj = lmv_object_find(obd, &op_data->op_fid2);
2021         if (obj) {
2022                 sidx = raw_name2idx(obj->lo_hashtype,
2023                                     obj->lo_objcount,
2024                                     op_data->op_name,
2025                                     op_data->op_namelen);
2026                 op_data->op_fid2 = obj->lo_stripes[sidx].ls_fid;
2027                 mds = obj->lo_stripes[sidx].ls_mds;
2028                 lmv_object_put(obj);
2029         } else {
2030                 rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds);
2031                 if (rc)
2032                         RETURN(rc);
2033         }
2034
2035         CDEBUG(D_INODE, "Forward to mds #%x ("DFID")\n",
2036                mds, PFID(&op_data->op_fid1));
2037
2038         op_data->op_fsuid = cfs_curproc_fsuid();
2039         op_data->op_fsgid = cfs_curproc_fsgid();
2040         op_data->op_cap = cfs_curproc_cap_pack();
2041         tgt = lmv_get_target(lmv, mds);
2042
2043         /*
2044          * Cancel UPDATE lock on child (fid1).
2045          */
2046         op_data->op_flags |= MF_MDC_CANCEL_FID2;
2047         rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2048                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2049         if (rc == 0)
2050                 rc = md_link(tgt->ltd_exp, op_data, request);
2051         if (rc == -ERESTART) {
2052                 LASSERT(*request != NULL);
2053                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2054                           "Got -ERESTART during link!\n");
2055                 ptlrpc_req_finished(*request);
2056                 *request = NULL;
2057
2058                 /*
2059                  * Directory got split. Time to update local object and repeat
2060                  * the request with proper MDS.
2061                  */
2062                 rc = lmv_handle_split(exp, &op_data->op_fid2);
2063                 if (rc == 0)
2064                         goto repeat;
2065         }
2066
2067         RETURN(rc);
2068 }
2069
2070 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
2071                       const char *old, int oldlen, const char *new, int newlen,
2072                       struct ptlrpc_request **request)
2073 {
2074         struct obd_device       *obd = exp->exp_obd;
2075         struct lmv_obd          *lmv = &obd->u.lmv;
2076         struct lmv_tgt_desc     *src_tgt;
2077         int                      rc;
2078         int                      sidx;
2079         int                      loop = 0;
2080         struct lmv_object       *obj;
2081         mdsno_t                  mds1;
2082         mdsno_t                  mds2;
2083         ENTRY;
2084
2085         LASSERT(oldlen != 0);
2086
2087         CDEBUG(D_INODE, "RENAME %*s in "DFID" to %*s in "DFID"\n",
2088                oldlen, old, PFID(&op_data->op_fid1),
2089                newlen, new, PFID(&op_data->op_fid2));
2090
2091         rc = lmv_check_connect(obd);
2092         if (rc)
2093                 RETURN(rc);
2094
2095 repeat:
2096         ++loop;
2097         LASSERT(loop <= 2);
2098         obj = lmv_object_find(obd, &op_data->op_fid1);
2099         if (obj) {
2100                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
2101                                     (char *)old, oldlen);
2102                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2103                 mds1 = obj->lo_stripes[sidx].ls_mds;
2104                 CDEBUG(D_INODE, "Parent obj "DFID"\n", PFID(&op_data->op_fid1));
2105                 lmv_object_put(obj);
2106         } else {
2107                 rc = lmv_fld_lookup(lmv, &op_data->op_fid1, &mds1);
2108                 if (rc)
2109                         RETURN(rc);
2110         }
2111
2112         obj = lmv_object_find(obd, &op_data->op_fid2);
2113         if (obj) {
2114                 /*
2115                  * Directory is already split, so we have to forward request to
2116                  * the right MDS.
2117                  */
2118                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
2119                                        (char *)new, newlen);
2120
2121                 mds2 = obj->lo_stripes[sidx].ls_mds;
2122                 op_data->op_fid2 = obj->lo_stripes[sidx].ls_fid;
2123                 CDEBUG(D_INODE, "Parent obj "DFID"\n", PFID(&op_data->op_fid2));
2124                 lmv_object_put(obj);
2125         } else {
2126                 rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds2);
2127                 if (rc)
2128                         RETURN(rc);
2129         }
2130
2131         op_data->op_fsuid = cfs_curproc_fsuid();
2132         op_data->op_fsgid = cfs_curproc_fsgid();
2133         op_data->op_cap = cfs_curproc_cap_pack();
2134
2135         src_tgt = lmv_get_target(lmv, mds1);
2136
2137         /*
2138          * LOOKUP lock on src child (fid3) should also be cancelled for
2139          * src_tgt in mdc_rename.
2140          */
2141         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2142
2143         /*
2144          * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
2145          * own target.
2146          */
2147         rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2148                               LCK_EX, MDS_INODELOCK_UPDATE,
2149                               MF_MDC_CANCEL_FID2);
2150
2151         /*
2152          * Cancel LOOKUP locks on tgt child (fid4) for parent tgt_tgt.
2153          */
2154         if (rc == 0) {
2155                 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2156                                       LCK_EX, MDS_INODELOCK_LOOKUP,
2157                                       MF_MDC_CANCEL_FID4);
2158         }
2159
2160         /*
2161          * Cancel all the locks on tgt child (fid4).
2162          */
2163         if (rc == 0)
2164                 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2165                                       LCK_EX, MDS_INODELOCK_FULL,
2166                                       MF_MDC_CANCEL_FID4);
2167
2168         if (rc == 0)
2169                 rc = md_rename(src_tgt->ltd_exp, op_data, old, oldlen,
2170                                new, newlen, request);
2171
2172         if (rc == -ERESTART) {
2173                 LASSERT(*request != NULL);
2174                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2175                           "Got -ERESTART during rename!\n");
2176                 ptlrpc_req_finished(*request);
2177                 *request = NULL;
2178
2179                 /*
2180                  * Directory got split. Time to update local object and repeat
2181                  * the request with proper MDS.
2182                  */
2183                 rc = lmv_handle_split(exp, &op_data->op_fid1);
2184                 if (rc == 0)
2185                         goto repeat;
2186         }
2187         RETURN(rc);
2188 }
2189
2190 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2191                        void *ea, int ealen, void *ea2, int ea2len,
2192                        struct ptlrpc_request **request,
2193                        struct md_open_data **mod)
2194 {
2195         struct obd_device       *obd = exp->exp_obd;
2196         struct lmv_obd          *lmv = &obd->u.lmv;
2197         struct ptlrpc_request   *req;
2198         struct lmv_tgt_desc     *tgt;
2199         struct lmv_object       *obj;
2200         int                      rc = 0;
2201         int                      i;
2202         ENTRY;
2203
2204         rc = lmv_check_connect(obd);
2205         if (rc)
2206                 RETURN(rc);
2207
2208         obj = lmv_object_find(obd, &op_data->op_fid1);
2209
2210         CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x%s\n",
2211                PFID(&op_data->op_fid1), op_data->op_attr.ia_valid,
2212                obj ? ", split" : "");
2213
2214         op_data->op_flags |= MF_MDC_CANCEL_FID1;
2215         if (obj) {
2216                 for (i = 0; i < obj->lo_objcount; i++) {
2217                         op_data->op_fid1 = obj->lo_stripes[i].ls_fid;
2218
2219                         tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
2220                         if (IS_ERR(tgt)) {
2221                                 rc = PTR_ERR(tgt);
2222                                 break;
2223                         }
2224
2225                         rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen,
2226                                         ea2, ea2len, &req, mod);
2227
2228                         if (lu_fid_eq(&obj->lo_fid, &obj->lo_stripes[i].ls_fid)) {
2229                                 /*
2230                                  * This is master object and this request should
2231                                  * be returned back to llite.
2232                                  */
2233                                 *request = req;
2234                         } else {
2235                                 ptlrpc_req_finished(req);
2236                         }
2237
2238                         if (rc)
2239                                 break;
2240                 }
2241                 lmv_object_put(obj);
2242         } else {
2243                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2244                 if (IS_ERR(tgt))
2245                         RETURN(PTR_ERR(tgt));
2246
2247                 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, ea2,
2248                                 ea2len, request, mod);
2249         }
2250         RETURN(rc);
2251 }
2252
2253 static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
2254                     struct obd_capa *oc, struct ptlrpc_request **request)
2255 {
2256         struct obd_device         *obd = exp->exp_obd;
2257         struct lmv_obd            *lmv = &obd->u.lmv;
2258         struct lmv_tgt_desc       *tgt;
2259         int                        rc;
2260         ENTRY;
2261
2262         rc = lmv_check_connect(obd);
2263         if (rc)
2264                 RETURN(rc);
2265
2266         tgt = lmv_find_target(lmv, fid);
2267         if (IS_ERR(tgt))
2268                 RETURN(PTR_ERR(tgt));
2269
2270         rc = md_sync(tgt->ltd_exp, fid, oc, request);
2271         RETURN(rc);
2272 }
2273
2274 /**
2275  * Main purpose of LMV blocking ast is to remove split directory LMV
2276  * presentation object (struct lmv_object) attached to the lock being revoked.
2277  */
2278 int lmv_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
2279                      void *data, int flag)
2280 {
2281         struct lustre_handle    lockh;
2282         struct lmv_object      *obj;
2283         int                     rc;
2284         ENTRY;
2285
2286         switch (flag) {
2287         case LDLM_CB_BLOCKING:
2288                 ldlm_lock2handle(lock, &lockh);
2289                 rc = ldlm_cli_cancel(&lockh);
2290                 if (rc < 0) {
2291                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
2292                         RETURN(rc);
2293                 }
2294                 break;
2295         case LDLM_CB_CANCELING:
2296                 /*
2297                  * Time to drop cached attrs for split directory object
2298                  */
2299                 obj = lock->l_ast_data;
2300                 if (obj) {
2301                         CDEBUG(D_INODE, "Cancel %s on "LPU64"/"LPU64
2302                                ", master "DFID"\n",
2303                                lock->l_resource->lr_name.name[3] == 1 ?
2304                                "LOOKUP" : "UPDATE",
2305                                lock->l_resource->lr_name.name[0],
2306                                lock->l_resource->lr_name.name[1],
2307                                PFID(&obj->lo_fid));
2308                         lmv_object_put(obj);
2309                 }
2310                 break;
2311         default:
2312                 LBUG();
2313         }
2314         RETURN(0);
2315 }
2316
2317 static void lmv_hash_adjust(__u64 *hash, __u64 hash_adj)
2318 {
2319         __u64         val;
2320
2321         val = le64_to_cpu(*hash);
2322         if (val < hash_adj)
2323                 val += MAX_HASH_SIZE;
2324         if (val != MDS_DIR_END_OFF)
2325                 *hash = cpu_to_le64(val - hash_adj);
2326 }
2327
2328 static __u32 lmv_node_rank(struct obd_export *exp, const struct lu_fid *fid)
2329 {
2330         __u64              id;
2331         struct obd_import *imp;
2332
2333         /*
2334          * XXX: to get nid we assume that underlying obd device is mdc.
2335          */
2336         imp  = class_exp2cliimp(exp);
2337         id   = imp->imp_connection->c_self + fid_flatten(fid);
2338
2339         CDEBUG(D_INODE, "Readpage node rank: "LPX64" "DFID" "LPX64" "LPX64"\n",
2340                imp->imp_connection->c_self, PFID(fid), id, id ^ (id >> 32));
2341
2342         return id ^ (id >> 32);
2343 }
2344
2345 static int lmv_readpage(struct obd_export *exp, struct md_op_data *op_data,
2346                         struct page **pages, struct ptlrpc_request **request)
2347 {
2348         struct obd_device       *obd = exp->exp_obd;
2349         struct lmv_obd          *lmv = &obd->u.lmv;
2350         struct lmv_object       *obj;
2351         struct lu_fid            rid = op_data->op_fid1;
2352         __u64                    offset = op_data->op_offset;
2353         __u64                    hash_adj = 0;
2354         __u32                    rank = 0;
2355         __u64                    seg_size = 0;
2356         __u64                    tgt_tmp = 0;
2357         int                      tgt_idx = 0;
2358         int                      tgt0_idx = 0;
2359         int                      rc;
2360         int                      nr = 0;
2361         int                      i;
2362         /* number of pages read, in CFS_PAGE_SIZE */
2363         int                      nrdpgs;
2364         /* number of pages transferred in LU_PAGE_SIZE */
2365         int                      nlupgs;
2366         struct lmv_stripe       *los;
2367         struct lmv_tgt_desc     *tgt;
2368         struct lu_dirpage       *dp;
2369         struct lu_dirent        *ent;
2370         ENTRY;
2371
2372         rc = lmv_check_connect(obd);
2373         if (rc)
2374                 RETURN(rc);
2375
2376         CDEBUG(D_INODE, "READPAGE at "LPX64" from "DFID"\n", offset, PFID(&rid));
2377
2378         /*
2379          * This case handle directory lookup in clustered metadata case (i.e.
2380          * split directory is located on multiple md servers.)
2381          * each server keeps directory entries for certain range of hashes.
2382          * E.g. we have N server and suppose hash range is 0 to MAX_HASH.
2383          * first server will keep records with hashes [ 0 ... MAX_HASH / N  - 1],
2384          * second one with hashes [MAX_HASH / N ... 2 * MAX_HASH / N] and
2385          * so on....
2386          *      readdir can simply start reading entries from 0 - N server in
2387          * order but that will not scale well as all client will request dir in
2388          * to server in same order.
2389          * Following algorithm does optimization:
2390          * Instead of doing readdir in 1, 2, ...., N order, client with a
2391          * rank R does readdir in R, R + 1, ..., N, 1, ... R - 1 order.
2392          * (every client has rank R)
2393          *      But ll_readdir() expect offset range [0 to MAX_HASH/N) but
2394          * since client ask dir from MDS{R} client has pages with offsets
2395          * [R*MAX_HASH/N ... (R + 1)*MAX_HASH/N] there for we do hash_adj
2396          * on hash  values that we get.
2397          */
2398         obj = lmv_object_find_lock(obd, &rid);
2399         if (obj) {
2400                 nr       = obj->lo_objcount;
2401                 LASSERT(nr > 0);
2402                 seg_size = MAX_HASH_SIZE;
2403                 do_div(seg_size, nr);
2404                 los      = obj->lo_stripes;
2405                 tgt      = lmv_get_target(lmv, los[0].ls_mds);
2406                 rank     = lmv_node_rank(tgt->ltd_exp, &rid) % nr;
2407                 tgt_tmp  = offset;
2408                 do_div(tgt_tmp, seg_size);
2409                 tgt0_idx = do_div(tgt_tmp,  nr);
2410                 tgt_idx  = (tgt0_idx + rank) % nr;
2411
2412                 if (tgt_idx < tgt0_idx)
2413                         /*
2414                          * Wrap around.
2415                          *
2416                          * Last segment has unusual length due to division
2417                          * rounding.
2418                          */
2419                         hash_adj = MAX_HASH_SIZE - seg_size * nr;
2420                 else
2421                         hash_adj = 0;
2422
2423                 hash_adj += rank * seg_size;
2424
2425                 CDEBUG(D_INODE, "Readpage hash adjustment: %x "LPX64" "
2426                        LPX64"/%x -> "LPX64"/%x\n", rank, hash_adj,
2427                        offset, tgt0_idx, offset + hash_adj, tgt_idx);
2428
2429                 offset = (offset + hash_adj) & MAX_HASH_SIZE;
2430                 rid = obj->lo_stripes[tgt_idx].ls_fid;
2431                 tgt = lmv_get_target(lmv, los[tgt_idx].ls_mds);
2432
2433                 CDEBUG(D_INODE, "Forward to "DFID" with offset %lu i %d\n",
2434                        PFID(&rid), (unsigned long)offset, tgt_idx);
2435         } else
2436                 tgt = lmv_find_target(lmv, &rid);
2437
2438         if (IS_ERR(tgt))
2439                 GOTO(cleanup, rc = PTR_ERR(tgt));
2440
2441         op_data->op_fid1 = rid;
2442         rc = md_readpage(tgt->ltd_exp, op_data, pages, request);
2443         if (rc)
2444                 GOTO(cleanup, rc);
2445
2446         nrdpgs = ((*request)->rq_bulk->bd_nob_transferred + CFS_PAGE_SIZE - 1)
2447                  >> CFS_PAGE_SHIFT;
2448         nlupgs = (*request)->rq_bulk->bd_nob_transferred >> LU_PAGE_SHIFT;
2449         LASSERT(!((*request)->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
2450         LASSERT(nrdpgs > 0 && nrdpgs <= op_data->op_npages);
2451
2452         CDEBUG(D_INODE, "read %d(%d)/%d pages\n", nrdpgs, nlupgs,
2453                op_data->op_npages);
2454
2455         for (i = 0; i < nrdpgs; i++) {
2456 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
2457                 struct lu_dirpage *first;
2458                 __u64 hash_end = 0;
2459                 __u32 flags = 0;
2460 #endif
2461                 struct lu_dirent *tmp = NULL;
2462
2463                 dp = cfs_kmap(pages[i]);
2464                 if (obj) {
2465                         lmv_hash_adjust(&dp->ldp_hash_start, hash_adj);
2466                         lmv_hash_adjust(&dp->ldp_hash_end,   hash_adj);
2467                         LASSERT(le64_to_cpu(dp->ldp_hash_start) <=
2468                                 op_data->op_offset);
2469
2470                         if ((tgt0_idx != nr - 1) &&
2471                             (le64_to_cpu(dp->ldp_hash_end) == MDS_DIR_END_OFF))
2472                         {
2473                                 dp->ldp_hash_end = cpu_to_le32(seg_size *
2474                                                                (tgt0_idx + 1));
2475                                 CDEBUG(D_INODE,
2476                                        ""DFID" reset end "LPX64" tgt %d\n",
2477                                        PFID(&rid),
2478                                        (__u64)le64_to_cpu(dp->ldp_hash_end),
2479                                        tgt_idx);
2480                         }
2481                 }
2482
2483                 ent = lu_dirent_start(dp);
2484 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
2485                 first = dp;
2486                 hash_end = dp->ldp_hash_end;
2487 repeat:
2488 #endif
2489                 nlupgs--;
2490                 for (tmp = ent; ent != NULL;
2491                      tmp = ent, ent = lu_dirent_next(ent)) {
2492                         if (obj)
2493                                 lmv_hash_adjust(&ent->lde_hash, hash_adj);
2494                 }
2495
2496 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
2497                 dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
2498                 if (((unsigned long)dp & ~CFS_PAGE_MASK) && nlupgs > 0) {
2499                         ent = lu_dirent_start(dp);
2500
2501                         if (obj) {
2502                                 lmv_hash_adjust(&dp->ldp_hash_end, hash_adj);
2503                                 if ((tgt0_idx != nr - 1) &&
2504                                     (le64_to_cpu(dp->ldp_hash_end) ==
2505                                      MDS_DIR_END_OFF)) {
2506                                         hash_end = cpu_to_le32(seg_size *
2507                                                                (tgt0_idx + 1));
2508                                         CDEBUG(D_INODE,
2509                                             ""DFID" reset end "LPX64" tgt %d\n",
2510                                             PFID(&rid),
2511                                             (__u64)le64_to_cpu(hash_end),
2512                                             tgt_idx);
2513                                 }
2514                         }
2515                         hash_end = dp->ldp_hash_end;
2516                         flags = dp->ldp_flags;
2517
2518                         if (tmp) {
2519                                 /* enlarge the end entry lde_reclen from 0 to
2520                                  * first entry of next lu_dirpage, in this way
2521                                  * several lu_dirpages can be stored into one
2522                                  * client page on client. */
2523                                 tmp = ((void *)tmp) +
2524                                       le16_to_cpu(tmp->lde_reclen);
2525                                 tmp->lde_reclen =
2526                                         cpu_to_le16((char *)(dp->ldp_entries) -
2527                                                     (char *)tmp);
2528                                 goto repeat;
2529                         }
2530                 }
2531                 first->ldp_hash_end = hash_end;
2532                 first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
2533                 first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
2534 #else
2535                 SET_BUT_UNUSED(tmp);
2536 #endif
2537                 cfs_kunmap(pages[i]);
2538         }
2539         EXIT;
2540 cleanup:
2541         if (obj)
2542                 lmv_object_put_unlock(obj);
2543         return rc;
2544 }
2545
2546 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2547                       struct ptlrpc_request **request)
2548 {
2549         struct obd_device       *obd = exp->exp_obd;
2550         struct lmv_obd          *lmv = &obd->u.lmv;
2551         struct lmv_tgt_desc     *tgt = NULL;
2552         struct lmv_object       *obj;
2553         int                      rc;
2554         int                      sidx;
2555         int                      loop = 0;
2556         ENTRY;
2557
2558         rc = lmv_check_connect(obd);
2559         if (rc)
2560                 RETURN(rc);
2561
2562 repeat:
2563         ++loop;
2564         LASSERT(loop <= 2);
2565         LASSERT(op_data->op_namelen != 0);
2566
2567         obj = lmv_object_find(obd, &op_data->op_fid1);
2568         if (obj) {
2569                 sidx = raw_name2idx(obj->lo_hashtype,
2570                                     obj->lo_objcount,
2571                                     op_data->op_name,
2572                                     op_data->op_namelen);
2573                 op_data->op_bias &= ~MDS_CHECK_SPLIT;
2574                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2575                 tgt = lmv_get_target(lmv,
2576                                      obj->lo_stripes[sidx].ls_mds);
2577                 lmv_object_put(obj);
2578                 CDEBUG(D_INODE, "UNLINK '%*s' in "DFID" -> %u\n",
2579                        op_data->op_namelen, op_data->op_name,
2580                        PFID(&op_data->op_fid1), sidx);
2581         }
2582
2583         if (tgt == NULL) {
2584                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2585                 if (IS_ERR(tgt))
2586                         RETURN(PTR_ERR(tgt));
2587                 op_data->op_bias |= MDS_CHECK_SPLIT;
2588         }
2589
2590         op_data->op_fsuid = cfs_curproc_fsuid();
2591         op_data->op_fsgid = cfs_curproc_fsgid();
2592         op_data->op_cap = cfs_curproc_cap_pack();
2593
2594         /*
2595          * If child's fid is given, cancel unused locks for it if it is from
2596          * another export than parent.
2597          *
2598          * LOOKUP lock for child (fid3) should also be cancelled on parent
2599          * tgt_tgt in mdc_unlink().
2600          */
2601         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2602
2603         /*
2604          * Cancel FULL locks on child (fid3).
2605          */
2606         rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2607                               MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2608
2609         if (rc == 0)
2610                 rc = md_unlink(tgt->ltd_exp, op_data, request);
2611
2612         if (rc == -ERESTART) {
2613                 LASSERT(*request != NULL);
2614                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2615                           "Got -ERESTART during unlink!\n");
2616                 ptlrpc_req_finished(*request);
2617                 *request = NULL;
2618
2619                 /*
2620                  * Directory got split. Time to update local object and repeat
2621                  * the request with proper MDS.
2622                  */
2623                 rc = lmv_handle_split(exp, &op_data->op_fid1);
2624                 if (rc == 0)
2625                         goto repeat;
2626         }
2627         RETURN(rc);
2628 }
2629
2630 static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2631 {
2632         struct lmv_obd *lmv = &obd->u.lmv;
2633         int rc = 0;
2634
2635         switch (stage) {
2636         case OBD_CLEANUP_EARLY:
2637                 /* XXX: here should be calling obd_precleanup() down to
2638                  * stack. */
2639                 break;
2640         case OBD_CLEANUP_EXPORTS:
2641                 fld_client_proc_fini(&lmv->lmv_fld);
2642                 lprocfs_obd_cleanup(obd);
2643                 rc = obd_llog_finish(obd, 0);
2644                 if (rc != 0)
2645                         CERROR("failed to cleanup llogging subsystems\n");
2646                 break;
2647         default:
2648                 break;
2649         }
2650         RETURN(rc);
2651 }
2652
2653 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
2654                         void *key, __u32 *vallen, void *val,
2655                         struct lov_stripe_md *lsm)
2656 {
2657         struct obd_device       *obd;
2658         struct lmv_obd          *lmv;
2659         int                      rc = 0;
2660         ENTRY;
2661
2662         obd = class_exp2obd(exp);
2663         if (obd == NULL) {
2664                 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2665                        exp->exp_handle.h_cookie);
2666                 RETURN(-EINVAL);
2667         }
2668
2669         lmv = &obd->u.lmv;
2670         if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2671                 struct lmv_tgt_desc *tgts;
2672                 int i;
2673
2674                 rc = lmv_check_connect(obd);
2675                 if (rc)
2676                         RETURN(rc);
2677
2678                 LASSERT(*vallen == sizeof(__u32));
2679                 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count;
2680                      i++, tgts++) {
2681
2682                         /*
2683                          * All tgts should be connected when this gets called.
2684                          */
2685                         if (!tgts || !tgts->ltd_exp) {
2686                                 CERROR("target not setup?\n");
2687                                 continue;
2688                         }
2689
2690                         if (!obd_get_info(tgts->ltd_exp, keylen, key,
2691                                           vallen, val, NULL))
2692                                 RETURN(0);
2693                 }
2694                 RETURN(-EINVAL);
2695         } else if (KEY_IS(KEY_MAX_EASIZE) || KEY_IS(KEY_CONN_DATA)) {
2696                 rc = lmv_check_connect(obd);
2697                 if (rc)
2698                         RETURN(rc);
2699
2700                 /*
2701                  * Forwarding this request to first MDS, it should know LOV
2702                  * desc.
2703                  */
2704                 rc = obd_get_info(lmv->tgts[0].ltd_exp, keylen, key,
2705                                   vallen, val, NULL);
2706                 if (!rc && KEY_IS(KEY_CONN_DATA)) {
2707                         exp->exp_connect_flags =
2708                         ((struct obd_connect_data *)val)->ocd_connect_flags;
2709                 }
2710                 RETURN(rc);
2711         } else if (KEY_IS(KEY_TGT_COUNT)) {
2712                 *((int *)val) = lmv->desc.ld_tgt_count;
2713                 RETURN(0);
2714         }
2715
2716         CDEBUG(D_IOCTL, "Invalid key\n");
2717         RETURN(-EINVAL);
2718 }
2719
2720 int lmv_set_info_async(struct obd_export *exp, obd_count keylen,
2721                        void *key, obd_count vallen, void *val,
2722                        struct ptlrpc_request_set *set)
2723 {
2724         struct lmv_tgt_desc    *tgt;
2725         struct obd_device      *obd;
2726         struct lmv_obd         *lmv;
2727         int rc = 0;
2728         ENTRY;
2729
2730         obd = class_exp2obd(exp);
2731         if (obd == NULL) {
2732                 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2733                        exp->exp_handle.h_cookie);
2734                 RETURN(-EINVAL);
2735         }
2736         lmv = &obd->u.lmv;
2737
2738         if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX)) {
2739                 int i, err = 0;
2740
2741                 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2742                         tgt = &lmv->tgts[i];
2743
2744                         if (!tgt->ltd_exp)
2745                                 continue;
2746
2747                         err = obd_set_info_async(tgt->ltd_exp,
2748                                                  keylen, key, vallen, val, set);
2749                         if (err && rc == 0)
2750                                 rc = err;
2751                 }
2752
2753                 RETURN(rc);
2754         }
2755
2756         RETURN(-EINVAL);
2757 }
2758
2759 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
2760                struct lov_stripe_md *lsm)
2761 {
2762         struct obd_device         *obd = class_exp2obd(exp);
2763         struct lmv_obd            *lmv = &obd->u.lmv;
2764         struct lmv_stripe_md      *meap;
2765         struct lmv_stripe_md      *lsmp;
2766         int                        mea_size;
2767         int                        i;
2768         ENTRY;
2769
2770         mea_size = lmv_get_easize(lmv);
2771         if (!lmmp)
2772                 RETURN(mea_size);
2773
2774         if (*lmmp && !lsm) {
2775                 OBD_FREE_LARGE(*lmmp, mea_size);
2776                 *lmmp = NULL;
2777                 RETURN(0);
2778         }
2779
2780         if (*lmmp == NULL) {
2781                 OBD_ALLOC_LARGE(*lmmp, mea_size);
2782                 if (*lmmp == NULL)
2783                         RETURN(-ENOMEM);
2784         }
2785
2786         if (!lsm)
2787                 RETURN(mea_size);
2788
2789         lsmp = (struct lmv_stripe_md *)lsm;
2790         meap = (struct lmv_stripe_md *)*lmmp;
2791
2792         if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
2793             lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
2794                 RETURN(-EINVAL);
2795
2796         meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
2797         meap->mea_count = cpu_to_le32(lsmp->mea_count);
2798         meap->mea_master = cpu_to_le32(lsmp->mea_master);
2799
2800         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2801                 meap->mea_ids[i] = meap->mea_ids[i];
2802                 fid_cpu_to_le(&meap->mea_ids[i], &meap->mea_ids[i]);
2803         }
2804
2805         RETURN(mea_size);
2806 }
2807
2808 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
2809                  struct lov_mds_md *lmm, int lmm_size)
2810 {
2811         struct obd_device          *obd = class_exp2obd(exp);
2812         struct lmv_stripe_md      **tmea = (struct lmv_stripe_md **)lsmp;
2813         struct lmv_stripe_md       *mea = (struct lmv_stripe_md *)lmm;
2814         struct lmv_obd             *lmv = &obd->u.lmv;
2815         int                         mea_size;
2816         int                         i;
2817         __u32                       magic;
2818         ENTRY;
2819
2820         mea_size = lmv_get_easize(lmv);
2821         if (lsmp == NULL)
2822                 return mea_size;
2823
2824         if (*lsmp != NULL && lmm == NULL) {
2825                 OBD_FREE_LARGE(*tmea, mea_size);
2826                 *lsmp = NULL;
2827                 RETURN(0);
2828         }
2829
2830         LASSERT(mea_size == lmm_size);
2831
2832         OBD_ALLOC_LARGE(*tmea, mea_size);
2833         if (*tmea == NULL)
2834                 RETURN(-ENOMEM);
2835
2836         if (!lmm)
2837                 RETURN(mea_size);
2838
2839         if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
2840             mea->mea_magic == MEA_MAGIC_ALL_CHARS ||
2841             mea->mea_magic == MEA_MAGIC_HASH_SEGMENT)
2842         {
2843                 magic = le32_to_cpu(mea->mea_magic);
2844         } else {
2845                 /*
2846                  * Old mea is not handled here.
2847                  */
2848                 CERROR("Old not supportable EA is found\n");
2849                 LBUG();
2850         }
2851
2852         (*tmea)->mea_magic = magic;
2853         (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
2854         (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
2855
2856         for (i = 0; i < (*tmea)->mea_count; i++) {
2857                 (*tmea)->mea_ids[i] = mea->mea_ids[i];
2858                 fid_le_to_cpu(&(*tmea)->mea_ids[i], &(*tmea)->mea_ids[i]);
2859         }
2860         RETURN(mea_size);
2861 }
2862
2863 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
2864                              ldlm_policy_data_t *policy, ldlm_mode_t mode,
2865                              ldlm_cancel_flags_t flags, void *opaque)
2866 {
2867         struct obd_device       *obd = exp->exp_obd;
2868         struct lmv_obd          *lmv = &obd->u.lmv;
2869         int                      rc = 0;
2870         int                      err;
2871         int                      i;
2872         ENTRY;
2873
2874         LASSERT(fid != NULL);
2875
2876         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2877                 if (!lmv->tgts[i].ltd_exp || !lmv->tgts[i].ltd_active)
2878                         continue;
2879
2880                 err = md_cancel_unused(lmv->tgts[i].ltd_exp, fid,
2881                                        policy, mode, flags, opaque);
2882                 if (!rc)
2883                         rc = err;
2884         }
2885         RETURN(rc);
2886 }
2887
2888 int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
2889                       __u64 *bits)
2890 {
2891         struct obd_device       *obd = exp->exp_obd;
2892         struct lmv_obd          *lmv = &obd->u.lmv;
2893         int                      rc;
2894         ENTRY;
2895
2896         rc =  md_set_lock_data(lmv->tgts[0].ltd_exp, lockh, data, bits);
2897         RETURN(rc);
2898 }
2899
2900 ldlm_mode_t lmv_lock_match(struct obd_export *exp, int flags,
2901                            const struct lu_fid *fid, ldlm_type_t type,
2902                            ldlm_policy_data_t *policy, ldlm_mode_t mode,
2903                            struct lustre_handle *lockh)
2904 {
2905         struct obd_device       *obd = exp->exp_obd;
2906         struct lmv_obd          *lmv = &obd->u.lmv;
2907         ldlm_mode_t              rc;
2908         int                      i;
2909         ENTRY;
2910
2911         CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
2912
2913         /*
2914          * With CMD every object can have two locks in different namespaces:
2915          * lookup lock in space of mds storing direntry and update/open lock in
2916          * space of mds storing inode. Thus we check all targets, not only that
2917          * one fid was created in.
2918          */
2919         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2920                 rc = md_lock_match(lmv->tgts[i].ltd_exp, flags, fid,
2921                                    type, policy, mode, lockh);
2922                 if (rc)
2923                         RETURN(rc);
2924         }
2925
2926         RETURN(0);
2927 }
2928
2929 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
2930                       struct obd_export *dt_exp, struct obd_export *md_exp,
2931                       struct lustre_md *md)
2932 {
2933         struct obd_device       *obd = exp->exp_obd;
2934         struct lmv_obd          *lmv = &obd->u.lmv;
2935         int                      rc;
2936         ENTRY;
2937         rc = md_get_lustre_md(lmv->tgts[0].ltd_exp, req, dt_exp, md_exp, md);
2938         RETURN(rc);
2939 }
2940
2941 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
2942 {
2943         struct obd_device       *obd = exp->exp_obd;
2944         struct lmv_obd          *lmv = &obd->u.lmv;
2945         ENTRY;
2946
2947         if (md->mea)
2948                 obd_free_memmd(exp, (void *)&md->mea);
2949         RETURN(md_free_lustre_md(lmv->tgts[0].ltd_exp, md));
2950 }
2951
2952 int lmv_set_open_replay_data(struct obd_export *exp,
2953                              struct obd_client_handle *och,
2954                              struct ptlrpc_request *open_req)
2955 {
2956         struct obd_device       *obd = exp->exp_obd;
2957         struct lmv_obd          *lmv = &obd->u.lmv;
2958         struct lmv_tgt_desc     *tgt;
2959         ENTRY;
2960
2961         tgt = lmv_find_target(lmv, &och->och_fid);
2962         if (IS_ERR(tgt))
2963                 RETURN(PTR_ERR(tgt));
2964
2965         RETURN(md_set_open_replay_data(tgt->ltd_exp, och, open_req));
2966 }
2967
2968 int lmv_clear_open_replay_data(struct obd_export *exp,
2969                                struct obd_client_handle *och)
2970 {
2971         struct obd_device       *obd = exp->exp_obd;
2972         struct lmv_obd          *lmv = &obd->u.lmv;
2973         struct lmv_tgt_desc     *tgt;
2974         ENTRY;
2975
2976         tgt = lmv_find_target(lmv, &och->och_fid);
2977         if (IS_ERR(tgt))
2978                 RETURN(PTR_ERR(tgt));
2979
2980         RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
2981 }
2982
2983 static int lmv_get_remote_perm(struct obd_export *exp,
2984                                const struct lu_fid *fid,
2985                                struct obd_capa *oc, __u32 suppgid,
2986                                struct ptlrpc_request **request)
2987 {
2988         struct obd_device       *obd = exp->exp_obd;
2989         struct lmv_obd          *lmv = &obd->u.lmv;
2990         struct lmv_tgt_desc     *tgt;
2991         int                      rc;
2992         ENTRY;
2993
2994         rc = lmv_check_connect(obd);
2995         if (rc)
2996                 RETURN(rc);
2997
2998         tgt = lmv_find_target(lmv, fid);
2999         if (IS_ERR(tgt))
3000                 RETURN(PTR_ERR(tgt));
3001
3002         rc = md_get_remote_perm(tgt->ltd_exp, fid, oc, suppgid, request);
3003         RETURN(rc);
3004 }
3005
3006 static int lmv_renew_capa(struct obd_export *exp, struct obd_capa *oc,
3007                           renew_capa_cb_t cb)
3008 {
3009         struct obd_device       *obd = exp->exp_obd;
3010         struct lmv_obd          *lmv = &obd->u.lmv;
3011         struct lmv_tgt_desc     *tgt;
3012         int                      rc;
3013         ENTRY;
3014
3015         rc = lmv_check_connect(obd);
3016         if (rc)
3017                 RETURN(rc);
3018
3019         tgt = lmv_find_target(lmv, &oc->c_capa.lc_fid);
3020         if (IS_ERR(tgt))
3021                 RETURN(PTR_ERR(tgt));
3022
3023         rc = md_renew_capa(tgt->ltd_exp, oc, cb);
3024         RETURN(rc);
3025 }
3026
3027 int lmv_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
3028                     const struct req_msg_field *field, struct obd_capa **oc)
3029 {
3030         struct obd_device *obd = exp->exp_obd;
3031         struct lmv_obd *lmv = &obd->u.lmv;
3032         int rc;
3033
3034         ENTRY;
3035         rc = md_unpack_capa(lmv->tgts[0].ltd_exp, req, field, oc);
3036         RETURN(rc);
3037 }
3038
3039 int lmv_intent_getattr_async(struct obd_export *exp,
3040                              struct md_enqueue_info *minfo,
3041                              struct ldlm_enqueue_info *einfo)
3042 {
3043         struct md_op_data       *op_data = &minfo->mi_data;
3044         struct obd_device       *obd = exp->exp_obd;
3045         struct lmv_obd          *lmv = &obd->u.lmv;
3046         struct lmv_object       *obj;
3047         struct lmv_tgt_desc     *tgt = NULL;
3048         int                      rc;
3049         int                      sidx;
3050         ENTRY;
3051
3052         rc = lmv_check_connect(obd);
3053         if (rc)
3054                 RETURN(rc);
3055
3056         if (op_data->op_namelen) {
3057                 obj = lmv_object_find(obd, &op_data->op_fid1);
3058                 if (obj) {
3059                         sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
3060                                             (char *)op_data->op_name,
3061                                             op_data->op_namelen);
3062                         op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
3063                         tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
3064                         lmv_object_put(obj);
3065                 }
3066         }
3067
3068         if (tgt == NULL)
3069                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
3070
3071         if (IS_ERR(tgt))
3072                 RETURN(PTR_ERR(tgt));
3073
3074         rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
3075         RETURN(rc);
3076 }
3077
3078 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
3079                         struct lu_fid *fid, __u64 *bits)
3080 {
3081         struct obd_device       *obd = exp->exp_obd;
3082         struct lmv_obd          *lmv = &obd->u.lmv;
3083         struct lmv_tgt_desc     *tgt;
3084         int                      rc;
3085         ENTRY;
3086
3087         rc = lmv_check_connect(obd);
3088         if (rc)
3089                 RETURN(rc);
3090
3091         tgt = lmv_find_target(lmv, fid);
3092         if (IS_ERR(tgt))
3093                 RETURN(PTR_ERR(tgt));
3094
3095         rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
3096         RETURN(rc);
3097 }
3098
3099 /**
3100  * For lmv, only need to send request to master MDT, and the master MDT will
3101  * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
3102  * we directly fetch data from the slave MDTs.
3103  */
3104 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
3105                  struct obd_quotactl *oqctl)
3106 {
3107         struct obd_device   *obd = class_exp2obd(exp);
3108         struct lmv_obd      *lmv = &obd->u.lmv;
3109         struct lmv_tgt_desc *tgt = &lmv->tgts[0];
3110         int                  rc = 0, i;
3111         __u64                curspace, curinodes;
3112         ENTRY;
3113
3114         if (!lmv->desc.ld_tgt_count || !tgt->ltd_active) {
3115                 CERROR("master lmv inactive\n");
3116                 RETURN(-EIO);
3117         }
3118
3119         if (oqctl->qc_cmd != Q_GETOQUOTA) {
3120                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
3121                 RETURN(rc);
3122         }
3123
3124         curspace = curinodes = 0;
3125         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3126                 int err;
3127                 tgt = &lmv->tgts[i];
3128
3129                 if (tgt->ltd_exp == NULL)
3130                         continue;
3131                 if (!tgt->ltd_active) {
3132                         CDEBUG(D_HA, "mdt %d is inactive.\n", i);
3133                         continue;
3134                 }
3135
3136                 err = obd_quotactl(tgt->ltd_exp, oqctl);
3137                 if (err) {
3138                         CERROR("getquota on mdt %d failed. %d\n", i, err);
3139                         if (!rc)
3140                                 rc = err;
3141                 } else {
3142                         curspace += oqctl->qc_dqblk.dqb_curspace;
3143                         curinodes += oqctl->qc_dqblk.dqb_curinodes;
3144                 }
3145         }
3146         oqctl->qc_dqblk.dqb_curspace = curspace;
3147         oqctl->qc_dqblk.dqb_curinodes = curinodes;
3148
3149         RETURN(rc);
3150 }
3151
3152 int lmv_quotacheck(struct obd_device *unused, struct obd_export *exp,
3153                    struct obd_quotactl *oqctl)
3154 {
3155         struct obd_device   *obd = class_exp2obd(exp);
3156         struct lmv_obd      *lmv = &obd->u.lmv;
3157         struct lmv_tgt_desc *tgt;
3158         int                  i, rc = 0;
3159         ENTRY;
3160
3161         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
3162                 int err;
3163
3164                 if (!tgt->ltd_active) {
3165                         CERROR("lmv idx %d inactive\n", i);
3166                         RETURN(-EIO);
3167                 }
3168
3169                 err = obd_quotacheck(tgt->ltd_exp, oqctl);
3170                 if (err && !rc)
3171                         rc = err;
3172         }
3173
3174         RETURN(rc);
3175 }
3176
3177 struct obd_ops lmv_obd_ops = {
3178         .o_owner                = THIS_MODULE,
3179         .o_setup                = lmv_setup,
3180         .o_cleanup              = lmv_cleanup,
3181         .o_precleanup           = lmv_precleanup,
3182         .o_process_config       = lmv_process_config,
3183         .o_connect              = lmv_connect,
3184         .o_disconnect           = lmv_disconnect,
3185         .o_statfs               = lmv_statfs,
3186         .o_get_info             = lmv_get_info,
3187         .o_set_info_async       = lmv_set_info_async,
3188         .o_packmd               = lmv_packmd,
3189         .o_unpackmd             = lmv_unpackmd,
3190         .o_notify               = lmv_notify,
3191         .o_get_uuid             = lmv_get_uuid,
3192         .o_iocontrol            = lmv_iocontrol,
3193         .o_fid_delete           = lmv_fid_delete,
3194         .o_quotacheck           = lmv_quotacheck,
3195         .o_quotactl             = lmv_quotactl
3196 };
3197
3198 struct md_ops lmv_md_ops = {
3199         .m_getstatus            = lmv_getstatus,
3200         .m_change_cbdata        = lmv_change_cbdata,
3201         .m_find_cbdata          = lmv_find_cbdata,
3202         .m_close                = lmv_close,
3203         .m_create               = lmv_create,
3204         .m_done_writing         = lmv_done_writing,
3205         .m_enqueue              = lmv_enqueue,
3206         .m_getattr              = lmv_getattr,
3207         .m_getxattr             = lmv_getxattr,
3208         .m_getattr_name         = lmv_getattr_name,
3209         .m_intent_lock          = lmv_intent_lock,
3210         .m_link                 = lmv_link,
3211         .m_rename               = lmv_rename,
3212         .m_setattr              = lmv_setattr,
3213         .m_setxattr             = lmv_setxattr,
3214         .m_sync                 = lmv_sync,
3215         .m_readpage             = lmv_readpage,
3216         .m_unlink               = lmv_unlink,
3217         .m_init_ea_size         = lmv_init_ea_size,
3218         .m_cancel_unused        = lmv_cancel_unused,
3219         .m_set_lock_data        = lmv_set_lock_data,
3220         .m_lock_match           = lmv_lock_match,
3221         .m_get_lustre_md        = lmv_get_lustre_md,
3222         .m_free_lustre_md       = lmv_free_lustre_md,
3223         .m_set_open_replay_data = lmv_set_open_replay_data,
3224         .m_clear_open_replay_data = lmv_clear_open_replay_data,
3225         .m_renew_capa           = lmv_renew_capa,
3226         .m_unpack_capa          = lmv_unpack_capa,
3227         .m_get_remote_perm      = lmv_get_remote_perm,
3228         .m_intent_getattr_async = lmv_intent_getattr_async,
3229         .m_revalidate_lock      = lmv_revalidate_lock
3230 };
3231
3232 int __init lmv_init(void)
3233 {
3234         struct lprocfs_static_vars lvars;
3235         int                        rc;
3236
3237         lmv_object_cache = cfs_mem_cache_create("lmv_objects",
3238                                                 sizeof(struct lmv_object),
3239                                                 0, 0);
3240         if (!lmv_object_cache) {
3241                 CERROR("Error allocating lmv objects cache\n");
3242                 return -ENOMEM;
3243         }
3244
3245         lprocfs_lmv_init_vars(&lvars);
3246
3247         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
3248                                  lvars.module_vars, LUSTRE_LMV_NAME, NULL);
3249         if (rc)
3250                 cfs_mem_cache_destroy(lmv_object_cache);
3251
3252         return rc;
3253 }
3254
3255 #ifdef __KERNEL__
3256 static void lmv_exit(void)
3257 {
3258         class_unregister_type(LUSTRE_LMV_NAME);
3259
3260         LASSERTF(cfs_atomic_read(&lmv_object_count) == 0,
3261                  "Can't free lmv objects cache, %d object(s) busy\n",
3262                  cfs_atomic_read(&lmv_object_count));
3263         cfs_mem_cache_destroy(lmv_object_cache);
3264 }
3265
3266 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3267 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
3268 MODULE_LICENSE("GPL");
3269
3270 module_init(lmv_init);
3271 module_exit(lmv_exit);
3272 #endif