lustre/lmv/lmv_obd.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LMV
  38 #ifdef __KERNEL__
  39 #include <linux/slab.h>
  40 #include <linux/module.h>
  41 #include <linux/init.h>
  42 #include <linux/slab.h>
  43 #include <linux/pagemap.h>
  44 #include <linux/mm.h>
  45 #include <asm/div64.h>
  46 #include <linux/seq_file.h>
  47 #include <linux/namei.h>
  48 #else
  49 #include <liblustre.h>
  50 #endif
  51
  52 #include <lustre_log.h>
  53 #include <obd_support.h>
  54 #include <lustre_lib.h>
  55 #include <lustre_net.h>
  56 #include <obd_class.h>
  57 #include <lprocfs_status.h>
  58 #include <lustre_lite.h>
  59 #include <lustre_fid.h>
  60 #include "lmv_internal.h"
  61
  62 /* object cache. */
  63 cfs_mem_cache_t *lmv_object_cache;
  64 cfs_atomic_t lmv_object_count = CFS_ATOMIC_INIT(0);
  65
  66 static void lmv_activate_target(struct lmv_obd *lmv,
  67                                 struct lmv_tgt_desc *tgt,
  68                                 int activate)
  69 {
  70         if (tgt->ltd_active == activate)
  71                 return;
  72
  73         tgt->ltd_active = activate;
  74         lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
  75 }
  76
  77 /**
  78  * Error codes:
  79  *
  80  *  -EINVAL  : UUID can't be found in the LMV's target list
  81  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
  82  *  -EBADF   : The UUID is found, but the OBD of the wrong type (!)
  83  */
  84 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
  85                               int activate)
  86 {
  87         struct lmv_tgt_desc    *tgt;
  88         struct obd_device      *obd;
  89         int                     i;
  90         int                     rc = 0;
  91         ENTRY;
  92
  93         CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
  94                lmv, uuid->uuid, activate);
  95
  96         cfs_spin_lock(&lmv->lmv_lock);
  97         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
  98                 if (tgt->ltd_exp == NULL)
  99                         continue;
 100
 101                 CDEBUG(D_INFO, "Target idx %d is %s conn "LPX64"\n",
 102                        i, tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
 103
 104                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 105                         break;
 106         }
 107
 108         if (i == lmv->desc.ld_tgt_count)
 109                 GOTO(out_lmv_lock, rc = -EINVAL);
 110
 111         obd = class_exp2obd(tgt->ltd_exp);
 112         if (obd == NULL)
 113                 GOTO(out_lmv_lock, rc = -ENOTCONN);
 114
 115         CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
 116                obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
 117                obd->obd_type->typ_name, i);
 118         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
 119
 120         if (tgt->ltd_active == activate) {
 121                 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
 122                        activate ? "" : "in");
 123                 GOTO(out_lmv_lock, rc);
 124         }
 125
 126         CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
 127                activate ? "" : "in");
 128         lmv_activate_target(lmv, tgt, activate);
 129         EXIT;
 130
 131  out_lmv_lock:
 132         cfs_spin_unlock(&lmv->lmv_lock);
 133         return rc;
 134 }
 135
 136 static int lmv_set_mdc_data(struct lmv_obd *lmv, struct obd_uuid *uuid,
 137                             struct obd_connect_data *data)
 138 {
 139         struct lmv_tgt_desc    *tgt;
 140         int                     i;
 141         ENTRY;
 142
 143         LASSERT(data != NULL);
 144
 145         cfs_spin_lock(&lmv->lmv_lock);
 146         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 147                 if (tgt->ltd_exp == NULL)
 148                         continue;
 149
 150                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 151                         lmv->datas[tgt->ltd_idx] = *data;
 152                         break;
 153                 }
 154         }
 155         cfs_spin_unlock(&lmv->lmv_lock);
 156         RETURN(0);
 157 }
 158
 159 struct obd_uuid *lmv_get_uuid(struct obd_export *exp) {
 160         struct obd_device *obd = exp->exp_obd;
 161         struct lmv_obd *lmv = &obd->u.lmv;
 162         return obd_get_uuid(lmv->tgts[0].ltd_exp);
 163 }
 164
 165 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
 166                       enum obd_notify_event ev, void *data)
 167 {
 168         struct obd_connect_data *conn_data;
 169         struct lmv_obd          *lmv = &obd->u.lmv;
 170         struct obd_uuid         *uuid;
 171         int                      rc = 0;
 172         ENTRY;
 173
 174         if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 175                 CERROR("unexpected notification of %s %s!\n",
 176                        watched->obd_type->typ_name,
 177                        watched->obd_name);
 178                 RETURN(-EINVAL);
 179         }
 180
 181         uuid = &watched->u.cli.cl_target_uuid;
 182         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
 183                 /*
 184                  * Set MDC as active before notifying the observer, so the
 185                  * observer can use the MDC normally.
 186                  */
 187                 rc = lmv_set_mdc_active(lmv, uuid,
 188                                         ev == OBD_NOTIFY_ACTIVE);
 189                 if (rc) {
 190                         CERROR("%sactivation of %s failed: %d\n",
 191                                ev == OBD_NOTIFY_ACTIVE ? "" : "de",
 192                                uuid->uuid, rc);
 193                         RETURN(rc);
 194                 }
 195         } else if (ev == OBD_NOTIFY_OCD) {
 196                 conn_data = &watched->u.cli.cl_import->imp_connect_data;
 197
 198                 /*
 199                  * Set connect data to desired target, update exp_connect_flags.
 200                  */
 201                 rc = lmv_set_mdc_data(lmv, uuid, conn_data);
 202                 if (rc) {
 203                         CERROR("can't set connect data to target %s, rc %d\n",
 204                                uuid->uuid, rc);
 205                         RETURN(rc);
 206                 }
 207
 208                 /*
 209                  * XXX: Make sure that ocd_connect_flags from all targets are
 210                  * the same. Otherwise one of MDTs runs wrong version or
 211                  * something like this.  --umka
 212                  */
 213                 obd->obd_self_export->exp_connect_flags =
 214                         conn_data->ocd_connect_flags;
 215         }
 216 #if 0
 217         else if (ev == OBD_NOTIFY_DISCON) {
 218                 /*
 219                  * For disconnect event, flush fld cache for failout MDS case.
 220                  */
 221                 fld_client_flush(&lmv->lmv_fld);
 222         }
 223 #endif
 224         /*
 225          * Pass the notification up the chain.
 226          */
 227         if (obd->obd_observer)
 228                 rc = obd_notify(obd->obd_observer, watched, ev, data);
 229
 230         RETURN(rc);
 231 }
 232
 233 /**
 234  * This is fake connect function. Its purpose is to initialize lmv and say
 235  * caller that everything is okay. Real connection will be performed later.
 236  */
 237 static int lmv_connect(const struct lu_env *env,
 238                        struct obd_export **exp, struct obd_device *obd,
 239                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 240                        void *localdata)
 241 {
 242 #ifdef __KERNEL__
 243         struct proc_dir_entry *lmv_proc_dir;
 244 #endif
 245         struct lmv_obd        *lmv = &obd->u.lmv;
 246         struct lustre_handle  conn = { 0 };
 247         int                    rc = 0;
 248         ENTRY;
 249
 250         /*
 251          * We don't want to actually do the underlying connections more than
 252          * once, so keep track.
 253          */
 254         lmv->refcount++;
 255         if (lmv->refcount > 1) {
 256                 *exp = NULL;
 257                 RETURN(0);
 258         }
 259
 260         rc = class_connect(&conn, obd, cluuid);
 261         if (rc) {
 262                 CERROR("class_connection() returned %d\n", rc);
 263                 RETURN(rc);
 264         }
 265
 266         *exp = class_conn2export(&conn);
 267         class_export_get(*exp);
 268
 269         lmv->exp = *exp;
 270         lmv->connected = 0;
 271         lmv->cluuid = *cluuid;
 272
 273         if (data)
 274                 lmv->conn_data = *data;
 275
 276 #ifdef __KERNEL__
 277         lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
 278                                         NULL, NULL);
 279         if (IS_ERR(lmv_proc_dir)) {
 280                 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
 281                        obd->obd_type->typ_name, obd->obd_name);
 282                 lmv_proc_dir = NULL;
 283         }
 284 #endif
 285
 286         /*
 287          * All real clients should perform actual connection right away, because
 288          * it is possible, that LMV will not have opportunity to connect targets
 289          * and MDC stuff will be called directly, for instance while reading
 290          * ../mdc/../kbytesfree procfs file, etc.
 291          */
 292         if (data->ocd_connect_flags & OBD_CONNECT_REAL)
 293                 rc = lmv_check_connect(obd);
 294
 295 #ifdef __KERNEL__
 296         if (rc) {
 297                 if (lmv_proc_dir)
 298                         lprocfs_remove(&lmv_proc_dir);
 299         }
 300 #endif
 301
 302         RETURN(rc);
 303 }
 304
 305 static void lmv_set_timeouts(struct obd_device *obd)
 306 {
 307         struct lmv_tgt_desc   *tgts;
 308         struct lmv_obd        *lmv;
 309         int                    i;
 310
 311         lmv = &obd->u.lmv;
 312         if (lmv->server_timeout == 0)
 313                 return;
 314
 315         if (lmv->connected == 0)
 316                 return;
 317
 318         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 319                 if (tgts->ltd_exp == NULL)
 320                         continue;
 321
 322                 obd_set_info_async(NULL, tgts->ltd_exp, sizeof(KEY_INTERMDS),
 323                                    KEY_INTERMDS, 0, NULL, NULL);
 324         }
 325 }
 326
 327 static int lmv_init_ea_size(struct obd_export *exp, int easize,
 328                             int def_easize, int cookiesize)
 329 {
 330         struct obd_device   *obd = exp->exp_obd;
 331         struct lmv_obd      *lmv = &obd->u.lmv;
 332         int                  i;
 333         int                  rc = 0;
 334         int                  change = 0;
 335         ENTRY;
 336
 337         if (lmv->max_easize < easize) {
 338                 lmv->max_easize = easize;
 339                 change = 1;
 340         }
 341         if (lmv->max_def_easize < def_easize) {
 342                 lmv->max_def_easize = def_easize;
 343                 change = 1;
 344         }
 345         if (lmv->max_cookiesize < cookiesize) {
 346                 lmv->max_cookiesize = cookiesize;
 347                 change = 1;
 348         }
 349         if (change == 0)
 350                 RETURN(0);
 351
 352         if (lmv->connected == 0)
 353                 RETURN(0);
 354
 355         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 356                 if (lmv->tgts[i].ltd_exp == NULL) {
 357                         CWARN("%s: NULL export for %d\n", obd->obd_name, i);
 358                         continue;
 359                 }
 360
 361                 rc = md_init_ea_size(lmv->tgts[i].ltd_exp, easize, def_easize,
 362                                      cookiesize);
 363                 if (rc) {
 364                         CERROR("obd_init_ea_size() failed on MDT target %d, "
 365                                "error %d.\n", i, rc);
 366                         break;
 367                 }
 368         }
 369         RETURN(rc);
 370 }
 371
 372 #define MAX_STRING_SIZE 128
 373
 374 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 375 {
 376 #ifdef __KERNEL__
 377         struct proc_dir_entry   *lmv_proc_dir;
 378 #endif
 379         struct lmv_obd          *lmv = &obd->u.lmv;
 380         struct obd_uuid         *cluuid = &lmv->cluuid;
 381         struct obd_connect_data *mdc_data = NULL;
 382         struct obd_uuid          lmv_mdc_uuid = { "LMV_MDC_UUID" };
 383         struct obd_device       *mdc_obd;
 384         struct obd_export       *mdc_exp;
 385         struct lu_fld_target     target;
 386         int                      rc;
 387         ENTRY;
 388
 389         mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
 390                                         &obd->obd_uuid);
 391         if (!mdc_obd) {
 392                 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
 393                 RETURN(-EINVAL);
 394         }
 395
 396         CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
 397                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 398                 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
 399                 cluuid->uuid);
 400
 401         if (!mdc_obd->obd_set_up) {
 402                 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
 403                 RETURN(-EINVAL);
 404         }
 405
 406         rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
 407                          &lmv->conn_data, NULL);
 408         if (rc) {
 409                 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
 410                 RETURN(rc);
 411         }
 412
 413         /*
 414          * Init fid sequence client for this mdc and add new fld target.
 415          */
 416         rc = obd_fid_init(mdc_exp);
 417         if (rc)
 418                 RETURN(rc);
 419
 420         target.ft_srv = NULL;
 421         target.ft_exp = mdc_exp;
 422         target.ft_idx = tgt->ltd_idx;
 423
 424         fld_client_add_target(&lmv->lmv_fld, &target);
 425
 426         mdc_data = &class_exp2cliimp(mdc_exp)->imp_connect_data;
 427
 428         rc = obd_register_observer(mdc_obd, obd);
 429         if (rc) {
 430                 obd_disconnect(mdc_exp);
 431                 CERROR("target %s register_observer error %d\n",
 432                        tgt->ltd_uuid.uuid, rc);
 433                 RETURN(rc);
 434         }
 435
 436         if (obd->obd_observer) {
 437                 /*
 438                  * Tell the observer about the new target.
 439                  */
 440                 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
 441                                 OBD_NOTIFY_ACTIVE, (void *)(tgt - lmv->tgts));
 442                 if (rc) {
 443                         obd_disconnect(mdc_exp);
 444                         RETURN(rc);
 445                 }
 446         }
 447
 448         tgt->ltd_active = 1;
 449         tgt->ltd_exp = mdc_exp;
 450         lmv->desc.ld_active_tgt_count++;
 451
 452         /*
 453          * Copy connect data, it may be used later.
 454          */
 455         lmv->datas[tgt->ltd_idx] = *mdc_data;
 456
 457         md_init_ea_size(tgt->ltd_exp, lmv->max_easize,
 458                         lmv->max_def_easize, lmv->max_cookiesize);
 459
 460         CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
 461                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 462                 cfs_atomic_read(&obd->obd_refcount));
 463
 464 #ifdef __KERNEL__
 465         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 466         if (lmv_proc_dir) {
 467                 struct proc_dir_entry *mdc_symlink;
 468
 469                 LASSERT(mdc_obd->obd_type != NULL);
 470                 LASSERT(mdc_obd->obd_type->typ_name != NULL);
 471                 mdc_symlink = lprocfs_add_symlink(mdc_obd->obd_name,
 472                                                   lmv_proc_dir,
 473                                                   "../../../%s/%s",
 474                                                   mdc_obd->obd_type->typ_name,
 475                                                   mdc_obd->obd_name);
 476                 if (mdc_symlink == NULL) {
 477                         CERROR("Could not register LMV target "
 478                                "/proc/fs/lustre/%s/%s/target_obds/%s.",
 479                                obd->obd_type->typ_name, obd->obd_name,
 480                                mdc_obd->obd_name);
 481                         lprocfs_remove(&lmv_proc_dir);
 482                         lmv_proc_dir = NULL;
 483                 }
 484         }
 485 #endif
 486         RETURN(0);
 487 }
 488
 489 int lmv_add_target(struct obd_device *obd, struct obd_uuid *tgt_uuid)
 490 {
 491         struct lmv_obd      *lmv = &obd->u.lmv;
 492         struct lmv_tgt_desc *tgt;
 493         int                  rc = 0;
 494         ENTRY;
 495
 496         CDEBUG(D_CONFIG, "Target uuid: %s.\n", tgt_uuid->uuid);
 497
 498         lmv_init_lock(lmv);
 499
 500         if (lmv->desc.ld_active_tgt_count >= LMV_MAX_TGT_COUNT) {
 501                 lmv_init_unlock(lmv);
 502                 CERROR("Can't add %s, LMV module compiled for %d MDCs. "
 503                        "That many MDCs already configured.\n",
 504                        tgt_uuid->uuid, LMV_MAX_TGT_COUNT);
 505                 RETURN(-EINVAL);
 506         }
 507         if (lmv->desc.ld_tgt_count == 0) {
 508                 struct obd_device *mdc_obd;
 509
 510                 mdc_obd = class_find_client_obd(tgt_uuid, LUSTRE_MDC_NAME,
 511                                                 &obd->obd_uuid);
 512                 if (!mdc_obd) {
 513                         lmv_init_unlock(lmv);
 514                         CERROR("Target %s not attached\n", tgt_uuid->uuid);
 515                         RETURN(-EINVAL);
 516                 }
 517
 518                 rc = obd_llog_init(obd, &obd->obd_olg, mdc_obd, NULL);
 519                 if (rc) {
 520                         lmv_init_unlock(lmv);
 521                         CERROR("lmv failed to setup llogging subsystems\n");
 522                 }
 523         }
 524         cfs_spin_lock(&lmv->lmv_lock);
 525         tgt = lmv->tgts + lmv->desc.ld_tgt_count++;
 526         tgt->ltd_uuid = *tgt_uuid;
 527         cfs_spin_unlock(&lmv->lmv_lock);
 528
 529         if (lmv->connected) {
 530                 rc = lmv_connect_mdc(obd, tgt);
 531                 if (rc) {
 532                         cfs_spin_lock(&lmv->lmv_lock);
 533                         lmv->desc.ld_tgt_count--;
 534                         memset(tgt, 0, sizeof(*tgt));
 535                         cfs_spin_unlock(&lmv->lmv_lock);
 536                 } else {
 537                         int easize = sizeof(struct lmv_stripe_md) +
 538                                      lmv->desc.ld_tgt_count *
 539                                      sizeof(struct lu_fid);
 540                         lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
 541                 }
 542         }
 543
 544         lmv_init_unlock(lmv);
 545         RETURN(rc);
 546 }
 547
 548 int lmv_check_connect(struct obd_device *obd)
 549 {
 550         struct lmv_obd       *lmv = &obd->u.lmv;
 551         struct lmv_tgt_desc  *tgt;
 552         int                   i;
 553         int                   rc;
 554         int                   easize;
 555         ENTRY;
 556
 557         if (lmv->connected)
 558                 RETURN(0);
 559
 560         lmv_init_lock(lmv);
 561         if (lmv->connected) {
 562                 lmv_init_unlock(lmv);
 563                 RETURN(0);
 564         }
 565
 566         if (lmv->desc.ld_tgt_count == 0) {
 567                 lmv_init_unlock(lmv);
 568                 CERROR("%s: no targets configured.\n", obd->obd_name);
 569                 RETURN(-EINVAL);
 570         }
 571
 572         CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
 573                lmv->cluuid.uuid, obd->obd_name);
 574
 575         LASSERT(lmv->tgts != NULL);
 576
 577         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
 578                 rc = lmv_connect_mdc(obd, tgt);
 579                 if (rc)
 580                         GOTO(out_disc, rc);
 581         }
 582
 583         lmv_set_timeouts(obd);
 584         class_export_put(lmv->exp);
 585         lmv->connected = 1;
 586         easize = lmv_get_easize(lmv);
 587         lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
 588         lmv_init_unlock(lmv);
 589         RETURN(0);
 590
 591  out_disc:
 592         while (i-- > 0) {
 593                 int rc2;
 594                 --tgt;
 595                 tgt->ltd_active = 0;
 596                 if (tgt->ltd_exp) {
 597                         --lmv->desc.ld_active_tgt_count;
 598                         rc2 = obd_disconnect(tgt->ltd_exp);
 599                         if (rc2) {
 600                                 CERROR("LMV target %s disconnect on "
 601                                        "MDC idx %d: error %d\n",
 602                                        tgt->ltd_uuid.uuid, i, rc2);
 603                         }
 604                 }
 605         }
 606         class_disconnect(lmv->exp);
 607         lmv_init_unlock(lmv);
 608         RETURN(rc);
 609 }
 610
 611 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 612 {
 613 #ifdef __KERNEL__
 614         struct proc_dir_entry  *lmv_proc_dir;
 615 #endif
 616         struct lmv_obd         *lmv = &obd->u.lmv;
 617         struct obd_device      *mdc_obd;
 618         int                     rc;
 619         ENTRY;
 620
 621         LASSERT(tgt != NULL);
 622         LASSERT(obd != NULL);
 623
 624         mdc_obd = class_exp2obd(tgt->ltd_exp);
 625
 626         if (mdc_obd) {
 627                 mdc_obd->obd_force = obd->obd_force;
 628                 mdc_obd->obd_fail = obd->obd_fail;
 629                 mdc_obd->obd_no_recov = obd->obd_no_recov;
 630         }
 631
 632 #ifdef __KERNEL__
 633         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 634         if (lmv_proc_dir) {
 635                 struct proc_dir_entry *mdc_symlink;
 636
 637                 mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
 638                 if (mdc_symlink) {
 639                         lprocfs_remove(&mdc_symlink);
 640                 } else {
 641                         CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
 642                                obd->obd_type->typ_name, obd->obd_name,
 643                                mdc_obd->obd_name);
 644                 }
 645         }
 646 #endif
 647         rc = obd_fid_fini(tgt->ltd_exp);
 648         if (rc)
 649                 CERROR("Can't finanize fids factory\n");
 650
 651         CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
 652                tgt->ltd_exp->exp_obd->obd_name,
 653                tgt->ltd_exp->exp_obd->obd_uuid.uuid);
 654
 655         obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
 656         rc = obd_disconnect(tgt->ltd_exp);
 657         if (rc) {
 658                 if (tgt->ltd_active) {
 659                         CERROR("Target %s disconnect error %d\n",
 660                                tgt->ltd_uuid.uuid, rc);
 661                 }
 662         }
 663
 664         lmv_activate_target(lmv, tgt, 0);
 665         tgt->ltd_exp = NULL;
 666         RETURN(0);
 667 }
 668
 669 static int lmv_disconnect(struct obd_export *exp)
 670 {
 671         struct obd_device     *obd = class_exp2obd(exp);
 672 #ifdef __KERNEL__
 673         struct proc_dir_entry *lmv_proc_dir;
 674 #endif
 675         struct lmv_obd        *lmv = &obd->u.lmv;
 676         int                    rc;
 677         int                    i;
 678         ENTRY;
 679
 680         if (!lmv->tgts)
 681                 goto out_local;
 682
 683         /*
 684          * Only disconnect the underlying layers on the final disconnect.
 685          */
 686         lmv->refcount--;
 687         if (lmv->refcount != 0)
 688                 goto out_local;
 689
 690         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 691                 if (lmv->tgts[i].ltd_exp == NULL)
 692                         continue;
 693                 lmv_disconnect_mdc(obd, &lmv->tgts[i]);
 694         }
 695
 696 #ifdef __KERNEL__
 697         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 698         if (lmv_proc_dir) {
 699                 lprocfs_remove(&lmv_proc_dir);
 700         } else {
 701                 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
 702                        obd->obd_type->typ_name, obd->obd_name);
 703         }
 704 #endif
 705
 706 out_local:
 707         /*
 708          * This is the case when no real connection is established by
 709          * lmv_check_connect().
 710          */
 711         if (!lmv->connected)
 712                 class_export_put(exp);
 713         rc = class_disconnect(exp);
 714         if (lmv->refcount == 0)
 715                 lmv->connected = 0;
 716         RETURN(rc);
 717 }
 718
 719 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 720                          int len, void *karg, void *uarg)
 721 {
 722         struct obd_device    *obddev = class_exp2obd(exp);
 723         struct lmv_obd       *lmv = &obddev->u.lmv;
 724         int                   i = 0;
 725         int                   rc = 0;
 726         int                   set = 0;
 727         int                   count = lmv->desc.ld_tgt_count;
 728         ENTRY;
 729
 730         if (count == 0)
 731                 RETURN(-ENOTTY);
 732
 733         switch (cmd) {
 734         case IOC_OBD_STATFS: {
 735                 struct obd_ioctl_data *data = karg;
 736                 struct obd_device *mdc_obd;
 737                 struct obd_statfs stat_buf = {0};
 738                 __u32 index;
 739
 740                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
 741                 if ((index >= count))
 742                         RETURN(-ENODEV);
 743
 744                 if (!lmv->tgts[index].ltd_active)
 745                         RETURN(-ENODATA);
 746
 747                 mdc_obd = class_exp2obd(lmv->tgts[index].ltd_exp);
 748                 if (!mdc_obd)
 749                         RETURN(-EINVAL);
 750
 751                 /* copy UUID */
 752                 if (cfs_copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
 753                                      min((int) data->ioc_plen2,
 754                                          (int) sizeof(struct obd_uuid))))
 755                         RETURN(-EFAULT);
 756
 757                 rc = obd_statfs(NULL, lmv->tgts[index].ltd_exp, &stat_buf,
 758                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 759                                 0);
 760                 if (rc)
 761                         RETURN(rc);
 762                 if (cfs_copy_to_user(data->ioc_pbuf1, &stat_buf,
 763                                      min((int) data->ioc_plen1,
 764                                          (int) sizeof(stat_buf))))
 765                         RETURN(-EFAULT);
 766                 break;
 767         }
 768         case OBD_IOC_QUOTACTL: {
 769                 struct if_quotactl *qctl = karg;
 770                 struct lmv_tgt_desc *tgt = NULL;
 771                 struct obd_quotactl *oqctl;
 772
 773                 if (qctl->qc_valid == QC_MDTIDX) {
 774                         if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
 775                                 RETURN(-EINVAL);
 776
 777                         tgt = &lmv->tgts[qctl->qc_idx];
 778                         if (!tgt->ltd_exp)
 779                                 RETURN(-EINVAL);
 780                 } else if (qctl->qc_valid == QC_UUID) {
 781                         for (i = 0; i < count; i++) {
 782                                 tgt = &lmv->tgts[i];
 783                                 if (!obd_uuid_equals(&tgt->ltd_uuid,
 784                                                      &qctl->obd_uuid))
 785                                         continue;
 786
 787                                 if (tgt->ltd_exp == NULL)
 788                                         RETURN(-EINVAL);
 789
 790                                 break;
 791                         }
 792                 } else {
 793                         RETURN(-EINVAL);
 794                 }
 795
 796                 if (i >= count)
 797                         RETURN(-EAGAIN);
 798
 799                 LASSERT(tgt && tgt->ltd_exp);
 800                 OBD_ALLOC_PTR(oqctl);
 801                 if (!oqctl)
 802                         RETURN(-ENOMEM);
 803
 804                 QCTL_COPY(oqctl, qctl);
 805                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
 806                 if (rc == 0) {
 807                         QCTL_COPY(qctl, oqctl);
 808                         qctl->qc_valid = QC_MDTIDX;
 809                         qctl->obd_uuid = tgt->ltd_uuid;
 810                 }
 811                 OBD_FREE_PTR(oqctl);
 812                 break;
 813         }
 814         case OBD_IOC_CHANGELOG_SEND:
 815         case OBD_IOC_CHANGELOG_CLEAR: {
 816                 struct ioc_changelog *icc = karg;
 817
 818                 if (icc->icc_mdtindex >= count)
 819                         RETURN(-ENODEV);
 820
 821                 rc = obd_iocontrol(cmd, lmv->tgts[icc->icc_mdtindex].ltd_exp,
 822                                    sizeof(*icc), icc, NULL);
 823                 break;
 824         }
 825         case LL_IOC_GET_CONNECT_FLAGS: {
 826                 rc = obd_iocontrol(cmd, lmv->tgts[0].ltd_exp, len, karg, uarg);
 827                 break;
 828         }
 829
 830         default : {
 831                 for (i = 0; i < count; i++) {
 832                         int err;
 833                         struct obd_device *mdc_obd;
 834
 835                         if (lmv->tgts[i].ltd_exp == NULL)
 836                                 continue;
 837                         /* ll_umount_begin() sets force flag but for lmv, not
 838                          * mdc. Let's pass it through */
 839                         mdc_obd = class_exp2obd(lmv->tgts[i].ltd_exp);
 840                         mdc_obd->obd_force = obddev->obd_force;
 841                         err = obd_iocontrol(cmd, lmv->tgts[i].ltd_exp, len,
 842                                             karg, uarg);
 843                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
 844                                 RETURN(err);
 845                         } else if (err) {
 846                                 if (lmv->tgts[i].ltd_active) {
 847                                         CERROR("error: iocontrol MDC %s on MDT"
 848                                                "idx %d cmd %x: err = %d\n",
 849                                                 lmv->tgts[i].ltd_uuid.uuid,
 850                                                 i, cmd, err);
 851                                         if (!rc)
 852                                                 rc = err;
 853                                 }
 854                         } else
 855                                 set = 1;
 856                 }
 857                 if (!set && !rc)
 858                         rc = -EIO;
 859         }
 860         }
 861         RETURN(rc);
 862 }
 863
 864 static int lmv_all_chars_policy(int count, const char *name,
 865                                 int len)
 866 {
 867         unsigned int c = 0;
 868
 869         while (len > 0)
 870                 c += name[--len];
 871         c = c % count;
 872         return c;
 873 }
 874
 875 static int lmv_nid_policy(struct lmv_obd *lmv)
 876 {
 877         struct obd_import *imp;
 878         __u32              id;
 879
 880         /*
 881          * XXX: To get nid we assume that underlying obd device is mdc.
 882          */
 883         imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
 884         id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
 885         return id % lmv->desc.ld_tgt_count;
 886 }
 887
 888 static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
 889                           placement_policy_t placement)
 890 {
 891         switch (placement) {
 892         case PLACEMENT_CHAR_POLICY:
 893                 return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
 894                                             op_data->op_name,
 895                                             op_data->op_namelen);
 896         case PLACEMENT_NID_POLICY:
 897                 return lmv_nid_policy(lmv);
 898
 899         default:
 900                 break;
 901         }
 902
 903         CERROR("Unsupported placement policy %x\n", placement);
 904         return -EINVAL;
 905 }
 906
 907 /**
 908  * This is _inode_ placement policy function (not name).
 909  */
 910 static int lmv_placement_policy(struct obd_device *obd,
 911                                 struct md_op_data *op_data,
 912                                 mdsno_t *mds)
 913 {
 914         struct lmv_obd          *lmv = &obd->u.lmv;
 915         struct lmv_object       *obj;
 916         int                      rc;
 917         ENTRY;
 918
 919         LASSERT(mds != NULL);
 920
 921         if (lmv->desc.ld_tgt_count == 1) {
 922                 *mds = 0;
 923                 RETURN(0);
 924         }
 925
 926         /*
 927          * Allocate new fid on target according to operation type and parent
 928          * home mds.
 929          */
 930         obj = lmv_object_find(obd, &op_data->op_fid1);
 931         if (obj != NULL || op_data->op_name == NULL ||
 932             op_data->op_opc != LUSTRE_OPC_MKDIR) {
 933                 /*
 934                  * Allocate fid for non-dir or for null name or for case parent
 935                  * dir is split.
 936                  */
 937                 if (obj) {
 938                         lmv_object_put(obj);
 939
 940                         /*
 941                          * If we have this flag turned on, and we see that
 942                          * parent dir is split, this means, that caller did not
 943                          * notice split yet. This is race and we would like to
 944                          * let caller know that.
 945                          */
 946                         if (op_data->op_bias & MDS_CHECK_SPLIT)
 947                                 RETURN(-ERESTART);
 948                 }
 949
 950                 /*
 951                  * Allocate new fid on same mds where parent fid is located and
 952                  * where operation will be sent. In case of split dir, ->op_fid1
 953                  * and ->op_mds here will contain fid and mds of slave directory
 954                  * object (assigned by caller).
 955                  */
 956                 *mds = op_data->op_mds;
 957                 rc = 0;
 958         } else {
 959                 /*
 960                  * Parent directory is not split and we want to create a
 961                  * directory in it. Let's calculate where to place it according
 962                  * to operation data @op_data.
 963                  */
 964                 *mds = lmv_choose_mds(lmv, op_data, lmv->lmv_placement);
 965                 rc = 0;
 966         }
 967
 968         if (rc) {
 969                 CERROR("Can't choose MDS, err = %d\n", rc);
 970         } else {
 971                 LASSERT(*mds < lmv->desc.ld_tgt_count);
 972         }
 973
 974         RETURN(rc);
 975 }
 976
 977 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid,
 978                     mdsno_t mds)
 979 {
 980         struct lmv_tgt_desc *tgt;
 981         int                  rc;
 982         ENTRY;
 983
 984         tgt = lmv_get_target(lmv, mds);
 985
 986         /*
 987          * New seq alloc and FLD setup should be atomic. Otherwise we may find
 988          * on server that seq in new allocated fid is not yet known.
 989          */
 990         cfs_mutex_lock(&tgt->ltd_fid_mutex);
 991
 992         if (!tgt->ltd_active)
 993                 GOTO(out, rc = -ENODEV);
 994
 995         /*
 996          * Asking underlaying tgt layer to allocate new fid.
 997          */
 998         rc = obd_fid_alloc(tgt->ltd_exp, fid, NULL);
 999         if (rc > 0) {
1000                 LASSERT(fid_is_sane(fid));
1001                 rc = 0;
1002         }
1003
1004         EXIT;
1005 out:
1006         cfs_mutex_unlock(&tgt->ltd_fid_mutex);
1007         return rc;
1008 }
1009
1010 int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1011                   struct md_op_data *op_data)
1012 {
1013         struct obd_device     *obd = class_exp2obd(exp);
1014         struct lmv_obd        *lmv = &obd->u.lmv;
1015         mdsno_t                mds = 0;
1016         int                    rc;
1017         ENTRY;
1018
1019         LASSERT(op_data != NULL);
1020         LASSERT(fid != NULL);
1021
1022         rc = lmv_placement_policy(obd, op_data, &mds);
1023         if (rc) {
1024                 CERROR("Can't get target for allocating fid, "
1025                        "rc %d\n", rc);
1026                 RETURN(rc);
1027         }
1028
1029         rc = __lmv_fid_alloc(lmv, fid, mds);
1030         if (rc) {
1031                 CERROR("Can't alloc new fid, rc %d\n", rc);
1032                 RETURN(rc);
1033         }
1034
1035         RETURN(rc);
1036 }
1037
1038 static int lmv_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
1039 {
1040         ENTRY;
1041         LASSERT(exp != NULL && fid != NULL);
1042         if (lmv_object_delete(exp, fid)) {
1043                 CDEBUG(D_INODE, "Object "DFID" is destroyed.\n",
1044                        PFID(fid));
1045         }
1046         RETURN(0);
1047 }
1048
1049 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1050 {
1051         struct lmv_obd             *lmv = &obd->u.lmv;
1052         struct lprocfs_static_vars  lvars;
1053         struct lmv_desc            *desc;
1054         int                         rc;
1055         int                         i = 0;
1056         ENTRY;
1057
1058         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1059                 CERROR("LMV setup requires a descriptor\n");
1060                 RETURN(-EINVAL);
1061         }
1062
1063         desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1064         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1065                 CERROR("Lmv descriptor size wrong: %d > %d\n",
1066                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1067                 RETURN(-EINVAL);
1068         }
1069
1070         lmv->tgts_size = LMV_MAX_TGT_COUNT * sizeof(struct lmv_tgt_desc);
1071
1072         OBD_ALLOC(lmv->tgts, lmv->tgts_size);
1073         if (lmv->tgts == NULL)
1074                 RETURN(-ENOMEM);
1075
1076         for (i = 0; i < LMV_MAX_TGT_COUNT; i++) {
1077                 cfs_mutex_init(&lmv->tgts[i].ltd_fid_mutex);
1078                 lmv->tgts[i].ltd_idx = i;
1079         }
1080
1081         lmv->datas_size = LMV_MAX_TGT_COUNT * sizeof(struct obd_connect_data);
1082
1083         OBD_ALLOC(lmv->datas, lmv->datas_size);
1084         if (lmv->datas == NULL)
1085                 GOTO(out_free_tgts, rc = -ENOMEM);
1086
1087         obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1088         lmv->desc.ld_tgt_count = 0;
1089         lmv->desc.ld_active_tgt_count = 0;
1090         lmv->max_cookiesize = 0;
1091         lmv->max_def_easize = 0;
1092         lmv->max_easize = 0;
1093         lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
1094
1095         cfs_spin_lock_init(&lmv->lmv_lock);
1096         cfs_mutex_init(&lmv->init_mutex);
1097
1098         rc = lmv_object_setup(obd);
1099         if (rc) {
1100                 CERROR("Can't setup LMV object manager, error %d.\n", rc);
1101                 GOTO(out_free_datas, rc);
1102         }
1103
1104         lprocfs_lmv_init_vars(&lvars);
1105         lprocfs_obd_setup(obd, lvars.obd_vars);
1106 #ifdef LPROCFS
1107         {
1108                 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
1109                                         0444, &lmv_proc_target_fops, obd);
1110                 if (rc)
1111                         CWARN("%s: error adding LMV target_obd file: rc = %d\n",
1112                                obd->obd_name, rc);
1113        }
1114 #endif
1115         rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1116                              LUSTRE_CLI_FLD_HASH_DHT);
1117         if (rc) {
1118                 CERROR("Can't init FLD, err %d\n", rc);
1119                 GOTO(out_free_datas, rc);
1120         }
1121
1122         RETURN(0);
1123
1124 out_free_datas:
1125         OBD_FREE(lmv->datas, lmv->datas_size);
1126         lmv->datas = NULL;
1127 out_free_tgts:
1128         OBD_FREE(lmv->tgts, lmv->tgts_size);
1129         lmv->tgts = NULL;
1130         return rc;
1131 }
1132
1133 static int lmv_cleanup(struct obd_device *obd)
1134 {
1135         struct lmv_obd   *lmv = &obd->u.lmv;
1136         ENTRY;
1137
1138         fld_client_fini(&lmv->lmv_fld);
1139         lmv_object_cleanup(obd);
1140         OBD_FREE(lmv->datas, lmv->datas_size);
1141         OBD_FREE(lmv->tgts, lmv->tgts_size);
1142
1143         RETURN(0);
1144 }
1145
1146 static int lmv_process_config(struct obd_device *obd, obd_count len, void *buf)
1147 {
1148         struct lustre_cfg     *lcfg = buf;
1149         struct obd_uuid        tgt_uuid;
1150         int                    rc;
1151         ENTRY;
1152
1153         switch(lcfg->lcfg_command) {
1154         case LCFG_ADD_MDC:
1155                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(tgt_uuid.uuid))
1156                         GOTO(out, rc = -EINVAL);
1157
1158                 obd_str2uuid(&tgt_uuid, lustre_cfg_string(lcfg, 1));
1159                 rc = lmv_add_target(obd, &tgt_uuid);
1160                 GOTO(out, rc);
1161         default: {
1162                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1163                 GOTO(out, rc = -EINVAL);
1164         }
1165         }
1166 out:
1167         RETURN(rc);
1168 }
1169
1170 static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
1171                       struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1172 {
1173         struct obd_device     *obd = class_exp2obd(exp);
1174         struct lmv_obd        *lmv = &obd->u.lmv;
1175         struct obd_statfs     *temp;
1176         int                    rc = 0;
1177         int                    i;
1178         ENTRY;
1179
1180         rc = lmv_check_connect(obd);
1181         if (rc)
1182                 RETURN(rc);
1183
1184         OBD_ALLOC(temp, sizeof(*temp));
1185         if (temp == NULL)
1186                 RETURN(-ENOMEM);
1187
1188         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1189                 if (lmv->tgts[i].ltd_exp == NULL)
1190                         continue;
1191
1192                 rc = obd_statfs(env, lmv->tgts[i].ltd_exp, temp,
1193                                 max_age, flags);
1194                 if (rc) {
1195                         CERROR("can't stat MDS #%d (%s), error %d\n", i,
1196                                lmv->tgts[i].ltd_exp->exp_obd->obd_name,
1197                                rc);
1198                         GOTO(out_free_temp, rc);
1199                 }
1200                 if (i == 0) {
1201                         *osfs = *temp;
1202                 } else {
1203                         osfs->os_bavail += temp->os_bavail;
1204                         osfs->os_blocks += temp->os_blocks;
1205                         osfs->os_ffree += temp->os_ffree;
1206                         osfs->os_files += temp->os_files;
1207                 }
1208         }
1209
1210         EXIT;
1211 out_free_temp:
1212         OBD_FREE(temp, sizeof(*temp));
1213         return rc;
1214 }
1215
1216 static int lmv_getstatus(struct obd_export *exp,
1217                          struct lu_fid *fid,
1218                          struct obd_capa **pc)
1219 {
1220         struct obd_device    *obd = exp->exp_obd;
1221         struct lmv_obd       *lmv = &obd->u.lmv;
1222         int                   rc;
1223         ENTRY;
1224
1225         rc = lmv_check_connect(obd);
1226         if (rc)
1227                 RETURN(rc);
1228
1229         rc = md_getstatus(lmv->tgts[0].ltd_exp, fid, pc);
1230         RETURN(rc);
1231 }
1232
1233 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1234                         struct obd_capa *oc, obd_valid valid, const char *name,
1235                         const char *input, int input_size, int output_size,
1236                         int flags, struct ptlrpc_request **request)
1237 {
1238         struct obd_device      *obd = exp->exp_obd;
1239         struct lmv_obd         *lmv = &obd->u.lmv;
1240         struct lmv_tgt_desc    *tgt;
1241         int                     rc;
1242         ENTRY;
1243
1244         rc = lmv_check_connect(obd);
1245         if (rc)
1246                 RETURN(rc);
1247
1248         tgt = lmv_find_target(lmv, fid);
1249         if (IS_ERR(tgt))
1250                 RETURN(PTR_ERR(tgt));
1251
1252         rc = md_getxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1253                          input_size, output_size, flags, request);
1254
1255         RETURN(rc);
1256 }
1257
1258 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1259                         struct obd_capa *oc, obd_valid valid, const char *name,
1260                         const char *input, int input_size, int output_size,
1261                         int flags, __u32 suppgid,
1262                         struct ptlrpc_request **request)
1263 {
1264         struct obd_device      *obd = exp->exp_obd;
1265         struct lmv_obd         *lmv = &obd->u.lmv;
1266         struct lmv_tgt_desc    *tgt;
1267         int                     rc;
1268         ENTRY;
1269
1270         rc = lmv_check_connect(obd);
1271         if (rc)
1272                 RETURN(rc);
1273
1274         tgt = lmv_find_target(lmv, fid);
1275         if (IS_ERR(tgt))
1276                 RETURN(PTR_ERR(tgt));
1277
1278         rc = md_setxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1279                          input_size, output_size, flags, suppgid,
1280                          request);
1281
1282         RETURN(rc);
1283 }
1284
1285 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1286                        struct ptlrpc_request **request)
1287 {
1288         struct obd_device       *obd = exp->exp_obd;
1289         struct lmv_obd          *lmv = &obd->u.lmv;
1290         struct lmv_tgt_desc     *tgt;
1291         struct lmv_object       *obj;
1292         int                      rc;
1293         int                      i;
1294         ENTRY;
1295
1296         rc = lmv_check_connect(obd);
1297         if (rc)
1298                 RETURN(rc);
1299
1300         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1301         if (IS_ERR(tgt))
1302                 RETURN(PTR_ERR(tgt));
1303
1304         if (op_data->op_valid & OBD_MD_MDTIDX) {
1305                 op_data->op_mds = tgt->ltd_idx;
1306                 RETURN(0);
1307         }
1308
1309         rc = md_getattr(tgt->ltd_exp, op_data, request);
1310         if (rc)
1311                 RETURN(rc);
1312
1313         obj = lmv_object_find_lock(obd, &op_data->op_fid1);
1314
1315         CDEBUG(D_INODE, "GETATTR for "DFID" %s\n", PFID(&op_data->op_fid1),
1316                obj ? "(split)" : "");
1317
1318         /*
1319          * If object is split, then we loop over all the slaves and gather size
1320          * attribute. In ideal world we would have to gather also mds field from
1321          * all slaves, as object is spread over the cluster and this is
1322          * definitely interesting information and it is not good to loss it,
1323          * but...
1324          */
1325         if (obj) {
1326                 struct mdt_body *body;
1327
1328                 if (*request == NULL) {
1329                         lmv_object_put(obj);
1330                         RETURN(rc);
1331                 }
1332
1333                 body = req_capsule_server_get(&(*request)->rq_pill,
1334                                               &RMF_MDT_BODY);
1335                 LASSERT(body != NULL);
1336
1337                 for (i = 0; i < obj->lo_objcount; i++) {
1338                         if (lmv->tgts[i].ltd_exp == NULL) {
1339                                 CWARN("%s: NULL export for %d\n",
1340                                       obd->obd_name, i);
1341                                 continue;
1342                         }
1343
1344                         /*
1345                          * Skip master object.
1346                          */
1347                         if (lu_fid_eq(&obj->lo_fid, &obj->lo_stripes[i].ls_fid))
1348                                 continue;
1349
1350                         body->size += obj->lo_stripes[i].ls_size;
1351                 }
1352
1353                 lmv_object_put_unlock(obj);
1354         }
1355
1356         RETURN(rc);
1357 }
1358
1359 static int lmv_change_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1360                              ldlm_iterator_t it, void *data)
1361 {
1362         struct obd_device   *obd = exp->exp_obd;
1363         struct lmv_obd      *lmv = &obd->u.lmv;
1364         int                  i;
1365         int                  rc;
1366         ENTRY;
1367
1368         rc = lmv_check_connect(obd);
1369         if (rc)
1370                 RETURN(rc);
1371
1372         CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1373
1374         /*
1375          * With CMD every object can have two locks in different namespaces:
1376          * lookup lock in space of mds storing direntry and update/open lock in
1377          * space of mds storing inode.
1378          */
1379         for (i = 0; i < lmv->desc.ld_tgt_count; i++)
1380                 md_change_cbdata(lmv->tgts[i].ltd_exp, fid, it, data);
1381
1382         RETURN(0);
1383 }
1384
1385 static int lmv_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1386                            ldlm_iterator_t it, void *data)
1387 {
1388         struct obd_device   *obd = exp->exp_obd;
1389         struct lmv_obd      *lmv = &obd->u.lmv;
1390         int                  i;
1391         int                  rc;
1392         ENTRY;
1393
1394         rc = lmv_check_connect(obd);
1395         if (rc)
1396                 RETURN(rc);
1397
1398         CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1399
1400         /*
1401          * With CMD every object can have two locks in different namespaces:
1402          * lookup lock in space of mds storing direntry and update/open lock in
1403          * space of mds storing inode.
1404          */
1405         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1406                 rc = md_find_cbdata(lmv->tgts[i].ltd_exp, fid, it, data);
1407                 if (rc)
1408                         RETURN(rc);
1409         }
1410
1411         RETURN(rc);
1412 }
1413
1414
1415 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1416                      struct md_open_data *mod, struct ptlrpc_request **request)
1417 {
1418         struct obd_device     *obd = exp->exp_obd;
1419         struct lmv_obd        *lmv = &obd->u.lmv;
1420         struct lmv_tgt_desc   *tgt;
1421         int                    rc;
1422         ENTRY;
1423
1424         rc = lmv_check_connect(obd);
1425         if (rc)
1426                 RETURN(rc);
1427
1428         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1429         if (IS_ERR(tgt))
1430                 RETURN(PTR_ERR(tgt));
1431
1432         CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1433         rc = md_close(tgt->ltd_exp, op_data, mod, request);
1434         RETURN(rc);
1435 }
1436
1437 /**
1438  * Called in the case MDS returns -ERESTART on create on open, what means that
1439  * directory is split and its LMV presentation object has to be updated.
1440  */
1441 int lmv_handle_split(struct obd_export *exp, const struct lu_fid *fid)
1442 {
1443         struct obd_device       *obd = exp->exp_obd;
1444         struct lmv_obd          *lmv = &obd->u.lmv;
1445         struct ptlrpc_request   *req = NULL;
1446         struct lmv_tgt_desc     *tgt;
1447         struct lmv_object       *obj;
1448         struct lustre_md         md;
1449         struct md_op_data       *op_data;
1450         int                      mealen;
1451         int                      rc;
1452         __u64                    valid;
1453         ENTRY;
1454
1455         md.mea = NULL;
1456         mealen = lmv_get_easize(lmv);
1457
1458         valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA | OBD_MD_MEA;
1459
1460         tgt = lmv_find_target(lmv, fid);
1461         if (IS_ERR(tgt))
1462                 RETURN(PTR_ERR(tgt));
1463
1464         /*
1465          * Time to update mea of parent fid.
1466          */
1467
1468         OBD_ALLOC_PTR(op_data);
1469         if (op_data == NULL)
1470                 RETURN(-ENOMEM);
1471
1472         op_data->op_fid1 = *fid;
1473         op_data->op_mode = mealen;
1474         op_data->op_valid = valid;
1475
1476         rc = md_getattr(tgt->ltd_exp, op_data, &req);
1477         OBD_FREE_PTR(op_data);
1478         if (rc) {
1479                 CERROR("md_getattr() failed, error %d\n", rc);
1480                 GOTO(cleanup, rc);
1481         }
1482
1483         rc = md_get_lustre_md(tgt->ltd_exp, req, NULL, exp, &md);
1484         if (rc) {
1485                 CERROR("md_get_lustre_md() failed, error %d\n", rc);
1486                 GOTO(cleanup, rc);
1487         }
1488
1489         if (md.mea == NULL)
1490                 GOTO(cleanup, rc = -ENODATA);
1491
1492         obj = lmv_object_create(exp, fid, md.mea);
1493         if (IS_ERR(obj))
1494                 rc = PTR_ERR(obj);
1495         else
1496                 lmv_object_put(obj);
1497
1498         obd_free_memmd(exp, (void *)&md.mea);
1499         EXIT;
1500 cleanup:
1501         if (req)
1502                 ptlrpc_req_finished(req);
1503         return rc;
1504 }
1505
1506 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1507                const void *data, int datalen, int mode, __u32 uid,
1508                __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1509                struct ptlrpc_request **request)
1510 {
1511         struct obd_device       *obd = exp->exp_obd;
1512         struct lmv_obd          *lmv = &obd->u.lmv;
1513         struct lmv_tgt_desc     *tgt;
1514         struct lmv_object       *obj;
1515         int                      rc;
1516         int                      loop = 0;
1517         int                      sidx;
1518         ENTRY;
1519
1520         rc = lmv_check_connect(obd);
1521         if (rc)
1522                 RETURN(rc);
1523
1524         if (!lmv->desc.ld_active_tgt_count)
1525                 RETURN(-EIO);
1526 repeat:
1527         ++loop;
1528         LASSERT(loop <= 2);
1529
1530         obj = lmv_object_find(obd, &op_data->op_fid1);
1531         if (obj) {
1532                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1533                                        op_data->op_name, op_data->op_namelen);
1534                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1535                 op_data->op_bias &= ~MDS_CHECK_SPLIT;
1536                 op_data->op_mds = obj->lo_stripes[sidx].ls_mds;
1537                 tgt = lmv_get_target(lmv, op_data->op_mds);
1538                 lmv_object_put(obj);
1539         } else {
1540                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1541                 op_data->op_bias |= MDS_CHECK_SPLIT;
1542                 op_data->op_mds = tgt->ltd_idx;
1543         }
1544
1545         if (IS_ERR(tgt))
1546                 RETURN(PTR_ERR(tgt));
1547
1548         rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
1549         if (rc == -ERESTART)
1550                 goto repeat;
1551         else if (rc)
1552                 RETURN(rc);
1553
1554         CDEBUG(D_INODE, "CREATE '%*s' on "DFID" -> mds #%x\n",
1555                op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1556                op_data->op_mds);
1557
1558         op_data->op_flags |= MF_MDC_CANCEL_FID1;
1559         rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1560                        cap_effective, rdev, request);
1561         if (rc == 0) {
1562                 if (*request == NULL)
1563                         RETURN(rc);
1564                 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1565         } else if (rc == -ERESTART) {
1566                 LASSERT(*request != NULL);
1567                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1568                           "Got -ERESTART during create!\n");
1569                 ptlrpc_req_finished(*request);
1570                 *request = NULL;
1571
1572                 /*
1573                  * Directory got split. Time to update local object and repeat
1574                  * the request with proper MDS.
1575                  */
1576                 rc = lmv_handle_split(exp, &op_data->op_fid1);
1577                 if (rc == 0) {
1578                         rc = lmv_allocate_slaves(obd, &op_data->op_fid1,
1579                                                  op_data, &op_data->op_fid2);
1580                         if (rc)
1581                                 RETURN(rc);
1582                         goto repeat;
1583                 }
1584         }
1585         RETURN(rc);
1586 }
1587
1588 static int lmv_done_writing(struct obd_export *exp,
1589                             struct md_op_data *op_data,
1590                             struct md_open_data *mod)
1591 {
1592         struct obd_device     *obd = exp->exp_obd;
1593         struct lmv_obd        *lmv = &obd->u.lmv;
1594         struct lmv_tgt_desc   *tgt;
1595         int                    rc;
1596         ENTRY;
1597
1598         rc = lmv_check_connect(obd);
1599         if (rc)
1600                 RETURN(rc);
1601
1602         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1603         if (IS_ERR(tgt))
1604                 RETURN(PTR_ERR(tgt));
1605
1606         rc = md_done_writing(tgt->ltd_exp, op_data, mod);
1607         RETURN(rc);
1608 }
1609
1610 static int
1611 lmv_enqueue_slaves(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1612                    struct lookup_intent *it, struct md_op_data *op_data,
1613                    struct lustre_handle *lockh, void *lmm, int lmmsize)
1614 {
1615         struct obd_device     *obd = exp->exp_obd;
1616         struct lmv_obd        *lmv = &obd->u.lmv;
1617         struct lmv_stripe_md  *mea = op_data->op_mea1;
1618         struct md_op_data     *op_data2;
1619         struct lmv_tgt_desc   *tgt;
1620         int                    i;
1621         int                    rc = 0;
1622         ENTRY;
1623
1624         OBD_ALLOC_PTR(op_data2);
1625         if (op_data2 == NULL)
1626                 RETURN(-ENOMEM);
1627
1628         LASSERT(mea != NULL);
1629         for (i = 0; i < mea->mea_count; i++) {
1630                 memset(op_data2, 0, sizeof(*op_data2));
1631                 op_data2->op_fid1 = mea->mea_ids[i];
1632                 op_data2->op_bias = 0;
1633
1634                 tgt = lmv_find_target(lmv, &op_data2->op_fid1);
1635                 if (IS_ERR(tgt))
1636                         GOTO(cleanup, rc = PTR_ERR(tgt));
1637
1638                 if (tgt->ltd_exp == NULL)
1639                         continue;
1640
1641                 rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data2,
1642                                 lockh + i, lmm, lmmsize, NULL, 0);
1643
1644                 CDEBUG(D_INODE, "Take lock on slave "DFID" -> %d/%d\n",
1645                        PFID(&mea->mea_ids[i]), rc, it->d.lustre.it_status);
1646
1647                 if (rc)
1648                         GOTO(cleanup, rc);
1649
1650                 if (it->d.lustre.it_data) {
1651                         struct ptlrpc_request *req;
1652                         req = (struct ptlrpc_request *)it->d.lustre.it_data;
1653                         ptlrpc_req_finished(req);
1654                 }
1655
1656                 if (it->d.lustre.it_status)
1657                         GOTO(cleanup, rc = it->d.lustre.it_status);
1658         }
1659
1660         EXIT;
1661 cleanup:
1662         OBD_FREE_PTR(op_data2);
1663
1664         if (rc != 0) {
1665                 /*
1666                  * Drop all taken locks.
1667                  */
1668                 while (--i >= 0) {
1669                         if (lockh[i].cookie)
1670                                 ldlm_lock_decref(lockh + i, einfo->ei_mode);
1671                         lockh[i].cookie = 0;
1672                 }
1673         }
1674         return rc;
1675 }
1676
1677 static int
1678 lmv_enqueue_remote(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1679                    struct lookup_intent *it, struct md_op_data *op_data,
1680                    struct lustre_handle *lockh, void *lmm, int lmmsize,
1681                    int extra_lock_flags)
1682 {
1683         struct ptlrpc_request      *req = it->d.lustre.it_data;
1684         struct obd_device          *obd = exp->exp_obd;
1685         struct lmv_obd             *lmv = &obd->u.lmv;
1686         struct lustre_handle        plock;
1687         struct lmv_tgt_desc        *tgt;
1688         struct md_op_data          *rdata;
1689         struct lu_fid               fid1;
1690         struct mdt_body            *body;
1691         int                         rc = 0;
1692         int                         pmode;
1693         ENTRY;
1694
1695         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1696         LASSERT(body != NULL);
1697
1698         if (!(body->valid & OBD_MD_MDS))
1699                 RETURN(0);
1700
1701         CDEBUG(D_INODE, "REMOTE_ENQUEUE '%s' on "DFID" -> "DFID"\n",
1702                LL_IT2STR(it), PFID(&op_data->op_fid1), PFID(&body->fid1));
1703
1704         /*
1705          * We got LOOKUP lock, but we really need attrs.
1706          */
1707         pmode = it->d.lustre.it_lock_mode;
1708         LASSERT(pmode != 0);
1709         memcpy(&plock, lockh, sizeof(plock));
1710         it->d.lustre.it_lock_mode = 0;
1711         it->d.lustre.it_data = NULL;
1712         fid1 = body->fid1;
1713
1714         it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
1715         ptlrpc_req_finished(req);
1716
1717         tgt = lmv_find_target(lmv, &fid1);
1718         if (IS_ERR(tgt))
1719                 GOTO(out, rc = PTR_ERR(tgt));
1720
1721         OBD_ALLOC_PTR(rdata);
1722         if (rdata == NULL)
1723                 GOTO(out, rc = -ENOMEM);
1724
1725         rdata->op_fid1 = fid1;
1726         rdata->op_bias = MDS_CROSS_REF;
1727
1728         rc = md_enqueue(tgt->ltd_exp, einfo, it, rdata, lockh,
1729                         lmm, lmmsize, NULL, extra_lock_flags);
1730         OBD_FREE_PTR(rdata);
1731         EXIT;
1732 out:
1733         ldlm_lock_decref(&plock, pmode);
1734         return rc;
1735 }
1736
1737 static int
1738 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1739             struct lookup_intent *it, struct md_op_data *op_data,
1740             struct lustre_handle *lockh, void *lmm, int lmmsize,
1741             struct ptlrpc_request **req, int extra_lock_flags)
1742 {
1743         struct obd_device        *obd = exp->exp_obd;
1744         struct lmv_obd           *lmv = &obd->u.lmv;
1745         struct lmv_tgt_desc      *tgt;
1746         struct lmv_object        *obj;
1747         int                       sidx;
1748         int                       rc;
1749         ENTRY;
1750
1751         rc = lmv_check_connect(obd);
1752         if (rc)
1753                 RETURN(rc);
1754
1755         CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
1756                LL_IT2STR(it), PFID(&op_data->op_fid1));
1757
1758         if (op_data->op_mea1 && it && it->it_op == IT_UNLINK) {
1759                 rc = lmv_enqueue_slaves(exp, einfo, it, op_data,
1760                                         lockh, lmm, lmmsize);
1761                 RETURN(rc);
1762         }
1763
1764         obj = lmv_object_find(obd, &op_data->op_fid1);
1765         if (obj && op_data->op_namelen) {
1766                 sidx = raw_name2idx(obj->lo_hashtype,
1767                                        obj->lo_objcount,
1768                                        (char *)op_data->op_name,
1769                                        op_data->op_namelen);
1770                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1771                 tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
1772         } else {
1773                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1774         }
1775         if (obj)
1776                 lmv_object_put(obj);
1777
1778         if (IS_ERR(tgt))
1779                 RETURN(PTR_ERR(tgt));
1780
1781         CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%d\n",
1782                LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
1783
1784         rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data, lockh,
1785                         lmm, lmmsize, req, extra_lock_flags);
1786
1787         if (rc == 0 && it && it->it_op == IT_OPEN) {
1788                 rc = lmv_enqueue_remote(exp, einfo, it, op_data, lockh,
1789                                         lmm, lmmsize, extra_lock_flags);
1790         }
1791         RETURN(rc);
1792 }
1793
1794 static int
1795 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1796                  struct ptlrpc_request **request)
1797 {
1798         struct ptlrpc_request   *req = NULL;
1799         struct obd_device       *obd = exp->exp_obd;
1800         struct lmv_obd          *lmv = &obd->u.lmv;
1801         struct lu_fid            rid = op_data->op_fid1;
1802         struct lmv_tgt_desc     *tgt;
1803         struct mdt_body         *body;
1804         struct lmv_object       *obj;
1805         obd_valid                valid = op_data->op_valid;
1806         int                      rc;
1807         int                      loop = 0;
1808         int                      sidx;
1809         ENTRY;
1810
1811         rc = lmv_check_connect(obd);
1812         if (rc)
1813                 RETURN(rc);
1814
1815 repeat:
1816         ++loop;
1817         LASSERT(loop <= 2);
1818         obj = lmv_object_find(obd, &rid);
1819         if (obj) {
1820                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1821                                     op_data->op_name, op_data->op_namelen);
1822                 rid = obj->lo_stripes[sidx].ls_fid;
1823                 tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
1824                 op_data->op_mds = obj->lo_stripes[sidx].ls_mds;
1825                 valid &= ~OBD_MD_FLCKSPLIT;
1826                 lmv_object_put(obj);
1827         } else {
1828                 tgt = lmv_find_target(lmv, &rid);
1829                 valid |= OBD_MD_FLCKSPLIT;
1830                 op_data->op_mds = tgt->ltd_idx;
1831         }
1832         if (IS_ERR(tgt))
1833                 RETURN(PTR_ERR(tgt));
1834
1835         CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" - "DFID" -> mds #%d\n",
1836                op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1837                PFID(&rid), tgt->ltd_idx);
1838
1839         op_data->op_valid = valid;
1840         op_data->op_fid1 = rid;
1841         rc = md_getattr_name(tgt->ltd_exp, op_data, request);
1842         if (rc == 0) {
1843                 body = req_capsule_server_get(&(*request)->rq_pill,
1844                                               &RMF_MDT_BODY);
1845                 LASSERT(body != NULL);
1846
1847                 if (body->valid & OBD_MD_MDS) {
1848                         rid = body->fid1;
1849                         CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1850                                PFID(&rid));
1851
1852                         tgt = lmv_find_target(lmv, &rid);
1853                         if (IS_ERR(tgt)) {
1854                                 ptlrpc_req_finished(*request);
1855                                 RETURN(PTR_ERR(tgt));
1856                         }
1857
1858                         op_data->op_fid1 = rid;
1859                         op_data->op_valid |= OBD_MD_FLCROSSREF;
1860                         op_data->op_namelen = 0;
1861                         op_data->op_name = NULL;
1862                         rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
1863                         ptlrpc_req_finished(*request);
1864                         *request = req;
1865                 }
1866         } else if (rc == -ERESTART) {
1867                 LASSERT(*request != NULL);
1868                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1869                           "Got -ERESTART during getattr!\n");
1870                 ptlrpc_req_finished(*request);
1871                 *request = NULL;
1872
1873                 /*
1874                  * Directory got split. Time to update local object and repeat
1875                  * the request with proper MDS.
1876                  */
1877                 rc = lmv_handle_split(exp, &rid);
1878                 if (rc == 0)
1879                         goto repeat;
1880         }
1881         RETURN(rc);
1882 }
1883
1884 #define md_op_data_fid(op_data, fl)                     \
1885         (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1886          fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1887          fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1888          fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1889          NULL)
1890
1891 static int lmv_early_cancel_slaves(struct obd_export *exp,
1892                                    struct md_op_data *op_data, int op_tgt,
1893                                    ldlm_mode_t mode, int bits, int flag)
1894 {
1895         struct obd_device      *obd = exp->exp_obd;
1896         struct lmv_obd         *lmv = &obd->u.lmv;
1897         ldlm_policy_data_t      policy = {{0}};
1898         struct lu_fid          *op_fid;
1899         struct lu_fid          *st_fid;
1900         struct lmv_tgt_desc    *tgt;
1901         struct lmv_object      *obj;
1902         int                     rc = 0;
1903         int                     i;
1904         ENTRY;
1905
1906         op_fid = md_op_data_fid(op_data, flag);
1907         if (!fid_is_sane(op_fid))
1908                 RETURN(0);
1909
1910         obj = lmv_object_find(obd, op_fid);
1911         if (obj == NULL)
1912                 RETURN(-EALREADY);
1913
1914         policy.l_inodebits.bits = bits;
1915         for (i = 0; i < obj->lo_objcount; i++) {
1916                 tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
1917                 st_fid = &obj->lo_stripes[i].ls_fid;
1918                 if (op_tgt != tgt->ltd_idx) {
1919                         CDEBUG(D_INODE, "EARLY_CANCEL slave "DFID" -> mds #%d\n",
1920                                PFID(st_fid), tgt->ltd_idx);
1921                         rc = md_cancel_unused(tgt->ltd_exp, st_fid, &policy,
1922                                               mode, LCF_ASYNC, NULL);
1923                         if (rc)
1924                                 GOTO(out_put_obj, rc);
1925                 } else {
1926                         CDEBUG(D_INODE,
1927                                "EARLY_CANCEL skip operation target %d on "DFID"\n",
1928                                op_tgt, PFID(st_fid));
1929                         /*
1930                          * Do not cancel locks for operation target, they will
1931                          * be handled later in underlaying layer when calling
1932                          * function we run on behalf of.
1933                          */
1934                         *op_fid = *st_fid;
1935                         op_data->op_flags |= flag;
1936                 }
1937         }
1938         EXIT;
1939 out_put_obj:
1940         lmv_object_put(obj);
1941         return rc;
1942 }
1943
1944 static int lmv_early_cancel(struct obd_export *exp, struct md_op_data *op_data,
1945                             int op_tgt, ldlm_mode_t mode, int bits, int flag)
1946 {
1947         struct lu_fid          *fid = md_op_data_fid(op_data, flag);
1948         struct obd_device      *obd = exp->exp_obd;
1949         struct lmv_obd         *lmv = &obd->u.lmv;
1950         struct lmv_tgt_desc    *tgt;
1951         ldlm_policy_data_t      policy = {{0}};
1952         struct lmv_object      *obj;
1953         int                     rc = 0;
1954         ENTRY;
1955
1956         if (!fid_is_sane(fid))
1957                 RETURN(0);
1958
1959         obj = lmv_object_find(obd, fid);
1960         if (obj) {
1961                 rc = lmv_early_cancel_slaves(exp, op_data, op_tgt, mode,
1962                                              bits, flag);
1963                 lmv_object_put(obj);
1964         } else {
1965                 tgt = lmv_find_target(lmv, fid);
1966                 if (IS_ERR(tgt))
1967                         RETURN(PTR_ERR(tgt));
1968
1969                 if (tgt->ltd_idx != op_tgt) {
1970                         CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1971                         policy.l_inodebits.bits = bits;
1972                         rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1973                                               mode, LCF_ASYNC, NULL);
1974                 } else {
1975                         CDEBUG(D_INODE,
1976                                "EARLY_CANCEL skip operation target %d on "DFID"\n",
1977                                op_tgt, PFID(fid));
1978                         op_data->op_flags |= flag;
1979                         rc = 0;
1980                 }
1981
1982         }
1983         RETURN(rc);
1984 }
1985
1986 /*
1987  * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1988  * op_data->op_fid2
1989  */
1990 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1991                     struct ptlrpc_request **request)
1992 {
1993         struct obd_device       *obd = exp->exp_obd;
1994         struct lmv_obd          *lmv = &obd->u.lmv;
1995         struct lmv_tgt_desc     *tgt;
1996         struct lmv_object       *obj;
1997         int                      rc;
1998         int                      loop = 0;
1999         mdsno_t                  mds;
2000         int                      sidx;
2001         ENTRY;
2002
2003         rc = lmv_check_connect(obd);
2004         if (rc)
2005                 RETURN(rc);
2006
2007 repeat:
2008         ++loop;
2009         LASSERT(loop <= 2);
2010         LASSERT(op_data->op_namelen != 0);
2011
2012         CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
2013                PFID(&op_data->op_fid2), op_data->op_namelen,
2014                op_data->op_name, PFID(&op_data->op_fid1));
2015
2016         obj = lmv_object_find(obd, &op_data->op_fid2);
2017         if (obj) {
2018                 sidx = raw_name2idx(obj->lo_hashtype,
2019                                     obj->lo_objcount,
2020                                     op_data->op_name,
2021                                     op_data->op_namelen);
2022                 op_data->op_fid2 = obj->lo_stripes[sidx].ls_fid;
2023                 mds = obj->lo_stripes[sidx].ls_mds;
2024                 lmv_object_put(obj);
2025         } else {
2026                 rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds);
2027                 if (rc)
2028                         RETURN(rc);
2029         }
2030
2031         CDEBUG(D_INODE, "Forward to mds #%x ("DFID")\n",
2032                mds, PFID(&op_data->op_fid1));
2033
2034         op_data->op_fsuid = cfs_curproc_fsuid();
2035         op_data->op_fsgid = cfs_curproc_fsgid();
2036         op_data->op_cap = cfs_curproc_cap_pack();
2037         tgt = lmv_get_target(lmv, mds);
2038
2039         /*
2040          * Cancel UPDATE lock on child (fid1).
2041          */
2042         op_data->op_flags |= MF_MDC_CANCEL_FID2;
2043         rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2044                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2045         if (rc == 0)
2046                 rc = md_link(tgt->ltd_exp, op_data, request);
2047         if (rc == -ERESTART) {
2048                 LASSERT(*request != NULL);
2049                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2050                           "Got -ERESTART during link!\n");
2051                 ptlrpc_req_finished(*request);
2052                 *request = NULL;
2053
2054                 /*
2055                  * Directory got split. Time to update local object and repeat
2056                  * the request with proper MDS.
2057                  */
2058                 rc = lmv_handle_split(exp, &op_data->op_fid2);
2059                 if (rc == 0)
2060                         goto repeat;
2061         }
2062
2063         RETURN(rc);
2064 }
2065
2066 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
2067                       const char *old, int oldlen, const char *new, int newlen,
2068                       struct ptlrpc_request **request)
2069 {
2070         struct obd_device       *obd = exp->exp_obd;
2071         struct lmv_obd          *lmv = &obd->u.lmv;
2072         struct lmv_tgt_desc     *src_tgt;
2073         int                      rc;
2074         int                      sidx;
2075         int                      loop = 0;
2076         struct lmv_object       *obj;
2077         mdsno_t                  mds1;
2078         mdsno_t                  mds2;
2079         ENTRY;
2080
2081         LASSERT(oldlen != 0);
2082
2083         CDEBUG(D_INODE, "RENAME %*s in "DFID" to %*s in "DFID"\n",
2084                oldlen, old, PFID(&op_data->op_fid1),
2085                newlen, new, PFID(&op_data->op_fid2));
2086
2087         rc = lmv_check_connect(obd);
2088         if (rc)
2089                 RETURN(rc);
2090
2091 repeat:
2092         ++loop;
2093         LASSERT(loop <= 2);
2094         obj = lmv_object_find(obd, &op_data->op_fid1);
2095         if (obj) {
2096                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
2097                                     (char *)old, oldlen);
2098                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2099                 mds1 = obj->lo_stripes[sidx].ls_mds;
2100                 CDEBUG(D_INODE, "Parent obj "DFID"\n", PFID(&op_data->op_fid1));
2101                 lmv_object_put(obj);
2102         } else {
2103                 rc = lmv_fld_lookup(lmv, &op_data->op_fid1, &mds1);
2104                 if (rc)
2105                         RETURN(rc);
2106         }
2107
2108         obj = lmv_object_find(obd, &op_data->op_fid2);
2109         if (obj) {
2110                 /*
2111                  * Directory is already split, so we have to forward request to
2112                  * the right MDS.
2113                  */
2114                 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
2115                                        (char *)new, newlen);
2116
2117                 mds2 = obj->lo_stripes[sidx].ls_mds;
2118                 op_data->op_fid2 = obj->lo_stripes[sidx].ls_fid;
2119                 CDEBUG(D_INODE, "Parent obj "DFID"\n", PFID(&op_data->op_fid2));
2120                 lmv_object_put(obj);
2121         } else {
2122                 rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds2);
2123                 if (rc)
2124                         RETURN(rc);
2125         }
2126
2127         op_data->op_fsuid = cfs_curproc_fsuid();
2128         op_data->op_fsgid = cfs_curproc_fsgid();
2129         op_data->op_cap = cfs_curproc_cap_pack();
2130
2131         src_tgt = lmv_get_target(lmv, mds1);
2132
2133         /*
2134          * LOOKUP lock on src child (fid3) should also be cancelled for
2135          * src_tgt in mdc_rename.
2136          */
2137         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2138
2139         /*
2140          * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
2141          * own target.
2142          */
2143         rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2144                               LCK_EX, MDS_INODELOCK_UPDATE,
2145                               MF_MDC_CANCEL_FID2);
2146
2147         /*
2148          * Cancel LOOKUP locks on tgt child (fid4) for parent tgt_tgt.
2149          */
2150         if (rc == 0) {
2151                 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2152                                       LCK_EX, MDS_INODELOCK_LOOKUP,
2153                                       MF_MDC_CANCEL_FID4);
2154         }
2155
2156         /*
2157          * Cancel all the locks on tgt child (fid4).
2158          */
2159         if (rc == 0)
2160                 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2161                                       LCK_EX, MDS_INODELOCK_FULL,
2162                                       MF_MDC_CANCEL_FID4);
2163
2164         if (rc == 0)
2165                 rc = md_rename(src_tgt->ltd_exp, op_data, old, oldlen,
2166                                new, newlen, request);
2167
2168         if (rc == -ERESTART) {
2169                 LASSERT(*request != NULL);
2170                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2171                           "Got -ERESTART during rename!\n");
2172                 ptlrpc_req_finished(*request);
2173                 *request = NULL;
2174
2175                 /*
2176                  * Directory got split. Time to update local object and repeat
2177                  * the request with proper MDS.
2178                  */
2179                 rc = lmv_handle_split(exp, &op_data->op_fid1);
2180                 if (rc == 0)
2181                         goto repeat;
2182         }
2183         RETURN(rc);
2184 }
2185
2186 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2187                        void *ea, int ealen, void *ea2, int ea2len,
2188                        struct ptlrpc_request **request,
2189                        struct md_open_data **mod)
2190 {
2191         struct obd_device       *obd = exp->exp_obd;
2192         struct lmv_obd          *lmv = &obd->u.lmv;
2193         struct ptlrpc_request   *req;
2194         struct lmv_tgt_desc     *tgt;
2195         struct lmv_object       *obj;
2196         int                      rc = 0;
2197         int                      i;
2198         ENTRY;
2199
2200         rc = lmv_check_connect(obd);
2201         if (rc)
2202                 RETURN(rc);
2203
2204         obj = lmv_object_find(obd, &op_data->op_fid1);
2205
2206         CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x%s\n",
2207                PFID(&op_data->op_fid1), op_data->op_attr.ia_valid,
2208                obj ? ", split" : "");
2209
2210         op_data->op_flags |= MF_MDC_CANCEL_FID1;
2211         if (obj) {
2212                 for (i = 0; i < obj->lo_objcount; i++) {
2213                         op_data->op_fid1 = obj->lo_stripes[i].ls_fid;
2214
2215                         tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
2216                         if (IS_ERR(tgt)) {
2217                                 rc = PTR_ERR(tgt);
2218                                 break;
2219                         }
2220
2221                         rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen,
2222                                         ea2, ea2len, &req, mod);
2223
2224                         if (lu_fid_eq(&obj->lo_fid, &obj->lo_stripes[i].ls_fid)) {
2225                                 /*
2226                                  * This is master object and this request should
2227                                  * be returned back to llite.
2228                                  */
2229                                 *request = req;
2230                         } else {
2231                                 ptlrpc_req_finished(req);
2232                         }
2233
2234                         if (rc)
2235                                 break;
2236                 }
2237                 lmv_object_put(obj);
2238         } else {
2239                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2240                 if (IS_ERR(tgt))
2241                         RETURN(PTR_ERR(tgt));
2242
2243                 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, ea2,
2244                                 ea2len, request, mod);
2245         }
2246         RETURN(rc);
2247 }
2248
2249 static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
2250                     struct obd_capa *oc, struct ptlrpc_request **request)
2251 {
2252         struct obd_device         *obd = exp->exp_obd;
2253         struct lmv_obd            *lmv = &obd->u.lmv;
2254         struct lmv_tgt_desc       *tgt;
2255         int                        rc;
2256         ENTRY;
2257
2258         rc = lmv_check_connect(obd);
2259         if (rc)
2260                 RETURN(rc);
2261
2262         tgt = lmv_find_target(lmv, fid);
2263         if (IS_ERR(tgt))
2264                 RETURN(PTR_ERR(tgt));
2265
2266         rc = md_sync(tgt->ltd_exp, fid, oc, request);
2267         RETURN(rc);
2268 }
2269
2270 /**
2271  * Main purpose of LMV blocking ast is to remove split directory LMV
2272  * presentation object (struct lmv_object) attached to the lock being revoked.
2273  */
2274 int lmv_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
2275                      void *data, int flag)
2276 {
2277         struct lustre_handle    lockh;
2278         struct lmv_object      *obj;
2279         int                     rc;
2280         ENTRY;
2281
2282         switch (flag) {
2283         case LDLM_CB_BLOCKING:
2284                 ldlm_lock2handle(lock, &lockh);
2285                 rc = ldlm_cli_cancel(&lockh);
2286                 if (rc < 0) {
2287                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
2288                         RETURN(rc);
2289                 }
2290                 break;
2291         case LDLM_CB_CANCELING:
2292                 /*
2293                  * Time to drop cached attrs for split directory object
2294                  */
2295                 obj = lock->l_ast_data;
2296                 if (obj) {
2297                         CDEBUG(D_INODE, "Cancel %s on "LPU64"/"LPU64
2298                                ", master "DFID"\n",
2299                                lock->l_resource->lr_name.name[3] == 1 ?
2300                                "LOOKUP" : "UPDATE",
2301                                lock->l_resource->lr_name.name[0],
2302                                lock->l_resource->lr_name.name[1],
2303                                PFID(&obj->lo_fid));
2304                         lmv_object_put(obj);
2305                 }
2306                 break;
2307         default:
2308                 LBUG();
2309         }
2310         RETURN(0);
2311 }
2312
2313 static void lmv_hash_adjust(__u64 *hash, __u64 hash_adj)
2314 {
2315         __u64         val;
2316
2317         val = le64_to_cpu(*hash);
2318         if (val < hash_adj)
2319                 val += MAX_HASH_SIZE;
2320         if (val != MDS_DIR_END_OFF)
2321                 *hash = cpu_to_le64(val - hash_adj);
2322 }
2323
2324 static __u32 lmv_node_rank(struct obd_export *exp, const struct lu_fid *fid)
2325 {
2326         __u64              id;
2327         struct obd_import *imp;
2328
2329         /*
2330          * XXX: to get nid we assume that underlying obd device is mdc.
2331          */
2332         imp  = class_exp2cliimp(exp);
2333         id   = imp->imp_connection->c_self + fid_flatten(fid);
2334
2335         CDEBUG(D_INODE, "Readpage node rank: "LPX64" "DFID" "LPX64" "LPX64"\n",
2336                imp->imp_connection->c_self, PFID(fid), id, id ^ (id >> 32));
2337
2338         return id ^ (id >> 32);
2339 }
2340
2341 static int lmv_readpage(struct obd_export *exp, struct md_op_data *op_data,
2342                         struct page **pages, struct ptlrpc_request **request)
2343 {
2344         struct obd_device       *obd = exp->exp_obd;
2345         struct lmv_obd          *lmv = &obd->u.lmv;
2346         struct lmv_object       *obj;
2347         struct lu_fid            rid = op_data->op_fid1;
2348         __u64                    offset = op_data->op_offset;
2349         __u64                    hash_adj = 0;
2350         __u32                    rank = 0;
2351         __u64                    seg_size = 0;
2352         __u64                    tgt_tmp = 0;
2353         int                      tgt_idx = 0;
2354         int                      tgt0_idx = 0;
2355         int                      rc;
2356         int                      nr = 0;
2357         int                      i;
2358         /* number of pages read, in CFS_PAGE_SIZE */
2359         int                      nrdpgs;
2360         /* number of pages transferred in LU_PAGE_SIZE */
2361         int                      nlupgs;
2362         struct lmv_stripe       *los;
2363         struct lmv_tgt_desc     *tgt;
2364         struct lu_dirpage       *dp;
2365         struct lu_dirent        *ent;
2366         ENTRY;
2367
2368         rc = lmv_check_connect(obd);
2369         if (rc)
2370                 RETURN(rc);
2371
2372         CDEBUG(D_INODE, "READPAGE at "LPX64" from "DFID"\n", offset, PFID(&rid));
2373
2374         /*
2375          * This case handle directory lookup in clustered metadata case (i.e.
2376          * split directory is located on multiple md servers.)
2377          * each server keeps directory entries for certain range of hashes.
2378          * E.g. we have N server and suppose hash range is 0 to MAX_HASH.
2379          * first server will keep records with hashes [ 0 ... MAX_HASH / N  - 1],
2380          * second one with hashes [MAX_HASH / N ... 2 * MAX_HASH / N] and
2381          * so on....
2382          *      readdir can simply start reading entries from 0 - N server in
2383          * order but that will not scale well as all client will request dir in
2384          * to server in same order.
2385          * Following algorithm does optimization:
2386          * Instead of doing readdir in 1, 2, ...., N order, client with a
2387          * rank R does readdir in R, R + 1, ..., N, 1, ... R - 1 order.
2388          * (every client has rank R)
2389          *      But ll_readdir() expect offset range [0 to MAX_HASH/N) but
2390          * since client ask dir from MDS{R} client has pages with offsets
2391          * [R*MAX_HASH/N ... (R + 1)*MAX_HASH/N] there for we do hash_adj
2392          * on hash  values that we get.
2393          */
2394         obj = lmv_object_find_lock(obd, &rid);
2395         if (obj) {
2396                 nr       = obj->lo_objcount;
2397                 LASSERT(nr > 0);
2398                 seg_size = MAX_HASH_SIZE;
2399                 do_div(seg_size, nr);
2400                 los      = obj->lo_stripes;
2401                 tgt      = lmv_get_target(lmv, los[0].ls_mds);
2402                 rank     = lmv_node_rank(tgt->ltd_exp, &rid) % nr;
2403                 tgt_tmp  = offset;
2404                 do_div(tgt_tmp, seg_size);
2405                 tgt0_idx = do_div(tgt_tmp,  nr);
2406                 tgt_idx  = (tgt0_idx + rank) % nr;
2407
2408                 if (tgt_idx < tgt0_idx)
2409                         /*
2410                          * Wrap around.
2411                          *
2412                          * Last segment has unusual length due to division
2413                          * rounding.
2414                          */
2415                         hash_adj = MAX_HASH_SIZE - seg_size * nr;
2416                 else
2417                         hash_adj = 0;
2418
2419                 hash_adj += rank * seg_size;
2420
2421                 CDEBUG(D_INODE, "Readpage hash adjustment: %x "LPX64" "
2422                        LPX64"/%x -> "LPX64"/%x\n", rank, hash_adj,
2423                        offset, tgt0_idx, offset + hash_adj, tgt_idx);
2424
2425                 offset = (offset + hash_adj) & MAX_HASH_SIZE;
2426                 rid = obj->lo_stripes[tgt_idx].ls_fid;
2427                 tgt = lmv_get_target(lmv, los[tgt_idx].ls_mds);
2428
2429                 CDEBUG(D_INODE, "Forward to "DFID" with offset %lu i %d\n",
2430                        PFID(&rid), (unsigned long)offset, tgt_idx);
2431         } else
2432                 tgt = lmv_find_target(lmv, &rid);
2433
2434         if (IS_ERR(tgt))
2435                 GOTO(cleanup, rc = PTR_ERR(tgt));
2436
2437         op_data->op_fid1 = rid;
2438         rc = md_readpage(tgt->ltd_exp, op_data, pages, request);
2439         if (rc)
2440                 GOTO(cleanup, rc);
2441
2442         nrdpgs = ((*request)->rq_bulk->bd_nob_transferred + CFS_PAGE_SIZE - 1)
2443                  >> CFS_PAGE_SHIFT;
2444         nlupgs = (*request)->rq_bulk->bd_nob_transferred >> LU_PAGE_SHIFT;
2445         LASSERT(!((*request)->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
2446         LASSERT(nrdpgs > 0 && nrdpgs <= op_data->op_npages);
2447
2448         CDEBUG(D_INODE, "read %d(%d)/%d pages\n", nrdpgs, nlupgs,
2449                op_data->op_npages);
2450
2451         for (i = 0; i < nrdpgs; i++) {
2452 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
2453                 struct lu_dirpage *first;
2454                 __u64 hash_end = 0;
2455                 __u32 flags = 0;
2456 #endif
2457                 struct lu_dirent *tmp = NULL;
2458
2459                 dp = cfs_kmap(pages[i]);
2460                 if (obj) {
2461                         lmv_hash_adjust(&dp->ldp_hash_start, hash_adj);
2462                         lmv_hash_adjust(&dp->ldp_hash_end,   hash_adj);
2463                         LASSERT(le64_to_cpu(dp->ldp_hash_start) <=
2464                                 op_data->op_offset);
2465
2466                         if ((tgt0_idx != nr - 1) &&
2467                             (le64_to_cpu(dp->ldp_hash_end) == MDS_DIR_END_OFF))
2468                         {
2469                                 dp->ldp_hash_end = cpu_to_le32(seg_size *
2470                                                                (tgt0_idx + 1));
2471                                 CDEBUG(D_INODE,
2472                                        ""DFID" reset end "LPX64" tgt %d\n",
2473                                        PFID(&rid),
2474                                        (__u64)le64_to_cpu(dp->ldp_hash_end),
2475                                        tgt_idx);
2476                         }
2477                 }
2478
2479                 ent = lu_dirent_start(dp);
2480 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
2481                 first = dp;
2482                 hash_end = dp->ldp_hash_end;
2483 repeat:
2484 #endif
2485                 nlupgs--;
2486                 for (tmp = ent; ent != NULL;
2487                      tmp = ent, ent = lu_dirent_next(ent)) {
2488                         if (obj)
2489                                 lmv_hash_adjust(&ent->lde_hash, hash_adj);
2490                 }
2491
2492 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
2493                 dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
2494                 if (((unsigned long)dp & ~CFS_PAGE_MASK) && nlupgs > 0) {
2495                         ent = lu_dirent_start(dp);
2496
2497                         if (obj) {
2498                                 lmv_hash_adjust(&dp->ldp_hash_end, hash_adj);
2499                                 if ((tgt0_idx != nr - 1) &&
2500                                     (le64_to_cpu(dp->ldp_hash_end) ==
2501                                      MDS_DIR_END_OFF)) {
2502                                         hash_end = cpu_to_le32(seg_size *
2503                                                                (tgt0_idx + 1));
2504                                         CDEBUG(D_INODE,
2505                                             ""DFID" reset end "LPX64" tgt %d\n",
2506                                             PFID(&rid),
2507                                             (__u64)le64_to_cpu(hash_end),
2508                                             tgt_idx);
2509                                 }
2510                         }
2511                         hash_end = dp->ldp_hash_end;
2512                         flags = dp->ldp_flags;
2513
2514                         if (tmp) {
2515                                 /* enlarge the end entry lde_reclen from 0 to
2516                                  * first entry of next lu_dirpage, in this way
2517                                  * several lu_dirpages can be stored into one
2518                                  * client page on client. */
2519                                 tmp = ((void *)tmp) +
2520                                       le16_to_cpu(tmp->lde_reclen);
2521                                 tmp->lde_reclen =
2522                                         cpu_to_le16((char *)(dp->ldp_entries) -
2523                                                     (char *)tmp);
2524                                 goto repeat;
2525                         }
2526                 }
2527                 first->ldp_hash_end = hash_end;
2528                 first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
2529                 first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
2530 #else
2531                 SET_BUT_UNUSED(tmp);
2532 #endif
2533                 cfs_kunmap(pages[i]);
2534         }
2535         EXIT;
2536 cleanup:
2537         if (obj)
2538                 lmv_object_put_unlock(obj);
2539         return rc;
2540 }
2541
2542 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2543                       struct ptlrpc_request **request)
2544 {
2545         struct obd_device       *obd = exp->exp_obd;
2546         struct lmv_obd          *lmv = &obd->u.lmv;
2547         struct lmv_tgt_desc     *tgt = NULL;
2548         struct lmv_object       *obj;
2549         int                      rc;
2550         int                      sidx;
2551         int                      loop = 0;
2552         ENTRY;
2553
2554         rc = lmv_check_connect(obd);
2555         if (rc)
2556                 RETURN(rc);
2557
2558 repeat:
2559         ++loop;
2560         LASSERT(loop <= 2);
2561         LASSERT(op_data->op_namelen != 0);
2562
2563         obj = lmv_object_find(obd, &op_data->op_fid1);
2564         if (obj) {
2565                 sidx = raw_name2idx(obj->lo_hashtype,
2566                                     obj->lo_objcount,
2567                                     op_data->op_name,
2568                                     op_data->op_namelen);
2569                 op_data->op_bias &= ~MDS_CHECK_SPLIT;
2570                 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2571                 tgt = lmv_get_target(lmv,
2572                                      obj->lo_stripes[sidx].ls_mds);
2573                 lmv_object_put(obj);
2574                 CDEBUG(D_INODE, "UNLINK '%*s' in "DFID" -> %u\n",
2575                        op_data->op_namelen, op_data->op_name,
2576                        PFID(&op_data->op_fid1), sidx);
2577         }
2578
2579         if (tgt == NULL) {
2580                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2581                 if (IS_ERR(tgt))
2582                         RETURN(PTR_ERR(tgt));
2583                 op_data->op_bias |= MDS_CHECK_SPLIT;
2584         }
2585
2586         op_data->op_fsuid = cfs_curproc_fsuid();
2587         op_data->op_fsgid = cfs_curproc_fsgid();
2588         op_data->op_cap = cfs_curproc_cap_pack();
2589
2590         /*
2591          * If child's fid is given, cancel unused locks for it if it is from
2592          * another export than parent.
2593          *
2594          * LOOKUP lock for child (fid3) should also be cancelled on parent
2595          * tgt_tgt in mdc_unlink().
2596          */
2597         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2598
2599         /*
2600          * Cancel FULL locks on child (fid3).
2601          */
2602         rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2603                               MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2604
2605         if (rc == 0)
2606                 rc = md_unlink(tgt->ltd_exp, op_data, request);
2607
2608         if (rc == -ERESTART) {
2609                 LASSERT(*request != NULL);
2610                 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2611                           "Got -ERESTART during unlink!\n");
2612                 ptlrpc_req_finished(*request);
2613                 *request = NULL;
2614
2615                 /*
2616                  * Directory got split. Time to update local object and repeat
2617                  * the request with proper MDS.
2618                  */
2619                 rc = lmv_handle_split(exp, &op_data->op_fid1);
2620                 if (rc == 0)
2621                         goto repeat;
2622         }
2623         RETURN(rc);
2624 }
2625
2626 static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2627 {
2628         struct lmv_obd *lmv = &obd->u.lmv;
2629         int rc = 0;
2630
2631         switch (stage) {
2632         case OBD_CLEANUP_EARLY:
2633                 /* XXX: here should be calling obd_precleanup() down to
2634                  * stack. */
2635                 break;
2636         case OBD_CLEANUP_EXPORTS:
2637                 fld_client_proc_fini(&lmv->lmv_fld);
2638                 lprocfs_obd_cleanup(obd);
2639                 rc = obd_llog_finish(obd, 0);
2640                 if (rc != 0)
2641                         CERROR("failed to cleanup llogging subsystems\n");
2642                 break;
2643         default:
2644                 break;
2645         }
2646         RETURN(rc);
2647 }
2648
2649 static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
2650                         __u32 keylen, void *key, __u32 *vallen, void *val,
2651                         struct lov_stripe_md *lsm)
2652 {
2653         struct obd_device       *obd;
2654         struct lmv_obd          *lmv;
2655         int                      rc = 0;
2656         ENTRY;
2657
2658         obd = class_exp2obd(exp);
2659         if (obd == NULL) {
2660                 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2661                        exp->exp_handle.h_cookie);
2662                 RETURN(-EINVAL);
2663         }
2664
2665         lmv = &obd->u.lmv;
2666         if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2667                 struct lmv_tgt_desc *tgts;
2668                 int i;
2669
2670                 rc = lmv_check_connect(obd);
2671                 if (rc)
2672                         RETURN(rc);
2673
2674                 LASSERT(*vallen == sizeof(__u32));
2675                 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count;
2676                      i++, tgts++) {
2677
2678                         /*
2679                          * All tgts should be connected when this gets called.
2680                          */
2681                         if (!tgts || !tgts->ltd_exp) {
2682                                 CERROR("target not setup?\n");
2683                                 continue;
2684                         }
2685
2686                         if (!obd_get_info(env, tgts->ltd_exp, keylen, key,
2687                                           vallen, val, NULL))
2688                                 RETURN(0);
2689                 }
2690                 RETURN(-EINVAL);
2691         } else if (KEY_IS(KEY_MAX_EASIZE) || KEY_IS(KEY_CONN_DATA)) {
2692                 rc = lmv_check_connect(obd);
2693                 if (rc)
2694                         RETURN(rc);
2695
2696                 /*
2697                  * Forwarding this request to first MDS, it should know LOV
2698                  * desc.
2699                  */
2700                 rc = obd_get_info(env, lmv->tgts[0].ltd_exp, keylen, key,
2701                                   vallen, val, NULL);
2702                 if (!rc && KEY_IS(KEY_CONN_DATA)) {
2703                         exp->exp_connect_flags =
2704                         ((struct obd_connect_data *)val)->ocd_connect_flags;
2705                 }
2706                 RETURN(rc);
2707         } else if (KEY_IS(KEY_TGT_COUNT)) {
2708                 *((int *)val) = lmv->desc.ld_tgt_count;
2709                 RETURN(0);
2710         }
2711
2712         CDEBUG(D_IOCTL, "Invalid key\n");
2713         RETURN(-EINVAL);
2714 }
2715
2716 int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
2717                        obd_count keylen, void *key, obd_count vallen,
2718                        void *val, struct ptlrpc_request_set *set)
2719 {
2720         struct lmv_tgt_desc    *tgt;
2721         struct obd_device      *obd;
2722         struct lmv_obd         *lmv;
2723         int rc = 0;
2724         ENTRY;
2725
2726         obd = class_exp2obd(exp);
2727         if (obd == NULL) {
2728                 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2729                        exp->exp_handle.h_cookie);
2730                 RETURN(-EINVAL);
2731         }
2732         lmv = &obd->u.lmv;
2733
2734         if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX)) {
2735                 int i, err = 0;
2736
2737                 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2738                         tgt = &lmv->tgts[i];
2739
2740                         if (!tgt->ltd_exp)
2741                                 continue;
2742
2743                         err = obd_set_info_async(env, tgt->ltd_exp,
2744                                                  keylen, key, vallen, val, set);
2745                         if (err && rc == 0)
2746                                 rc = err;
2747                 }
2748
2749                 RETURN(rc);
2750         }
2751
2752         RETURN(-EINVAL);
2753 }
2754
2755 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
2756                struct lov_stripe_md *lsm)
2757 {
2758         struct obd_device         *obd = class_exp2obd(exp);
2759         struct lmv_obd            *lmv = &obd->u.lmv;
2760         struct lmv_stripe_md      *meap;
2761         struct lmv_stripe_md      *lsmp;
2762         int                        mea_size;
2763         int                        i;
2764         ENTRY;
2765
2766         mea_size = lmv_get_easize(lmv);
2767         if (!lmmp)
2768                 RETURN(mea_size);
2769
2770         if (*lmmp && !lsm) {
2771                 OBD_FREE_LARGE(*lmmp, mea_size);
2772                 *lmmp = NULL;
2773                 RETURN(0);
2774         }
2775
2776         if (*lmmp == NULL) {
2777                 OBD_ALLOC_LARGE(*lmmp, mea_size);
2778                 if (*lmmp == NULL)
2779                         RETURN(-ENOMEM);
2780         }
2781
2782         if (!lsm)
2783                 RETURN(mea_size);
2784
2785         lsmp = (struct lmv_stripe_md *)lsm;
2786         meap = (struct lmv_stripe_md *)*lmmp;
2787
2788         if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
2789             lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
2790                 RETURN(-EINVAL);
2791
2792         meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
2793         meap->mea_count = cpu_to_le32(lsmp->mea_count);
2794         meap->mea_master = cpu_to_le32(lsmp->mea_master);
2795
2796         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2797                 meap->mea_ids[i] = meap->mea_ids[i];
2798                 fid_cpu_to_le(&meap->mea_ids[i], &meap->mea_ids[i]);
2799         }
2800
2801         RETURN(mea_size);
2802 }
2803
2804 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
2805                  struct lov_mds_md *lmm, int lmm_size)
2806 {
2807         struct obd_device          *obd = class_exp2obd(exp);
2808         struct lmv_stripe_md      **tmea = (struct lmv_stripe_md **)lsmp;
2809         struct lmv_stripe_md       *mea = (struct lmv_stripe_md *)lmm;
2810         struct lmv_obd             *lmv = &obd->u.lmv;
2811         int                         mea_size;
2812         int                         i;
2813         __u32                       magic;
2814         ENTRY;
2815
2816         mea_size = lmv_get_easize(lmv);
2817         if (lsmp == NULL)
2818                 return mea_size;
2819
2820         if (*lsmp != NULL && lmm == NULL) {
2821                 OBD_FREE_LARGE(*tmea, mea_size);
2822                 *lsmp = NULL;
2823                 RETURN(0);
2824         }
2825
2826         LASSERT(mea_size == lmm_size);
2827
2828         OBD_ALLOC_LARGE(*tmea, mea_size);
2829         if (*tmea == NULL)
2830                 RETURN(-ENOMEM);
2831
2832         if (!lmm)
2833                 RETURN(mea_size);
2834
2835         if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
2836             mea->mea_magic == MEA_MAGIC_ALL_CHARS ||
2837             mea->mea_magic == MEA_MAGIC_HASH_SEGMENT)
2838         {
2839                 magic = le32_to_cpu(mea->mea_magic);
2840         } else {
2841                 /*
2842                  * Old mea is not handled here.
2843                  */
2844                 CERROR("Old not supportable EA is found\n");
2845                 LBUG();
2846         }
2847
2848         (*tmea)->mea_magic = magic;
2849         (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
2850         (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
2851
2852         for (i = 0; i < (*tmea)->mea_count; i++) {
2853                 (*tmea)->mea_ids[i] = mea->mea_ids[i];
2854                 fid_le_to_cpu(&(*tmea)->mea_ids[i], &(*tmea)->mea_ids[i]);
2855         }
2856         RETURN(mea_size);
2857 }
2858
2859 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
2860                              ldlm_policy_data_t *policy, ldlm_mode_t mode,
2861                              ldlm_cancel_flags_t flags, void *opaque)
2862 {
2863         struct obd_device       *obd = exp->exp_obd;
2864         struct lmv_obd          *lmv = &obd->u.lmv;
2865         int                      rc = 0;
2866         int                      err;
2867         int                      i;
2868         ENTRY;
2869
2870         LASSERT(fid != NULL);
2871
2872         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2873                 if (!lmv->tgts[i].ltd_exp || !lmv->tgts[i].ltd_active)
2874                         continue;
2875
2876                 err = md_cancel_unused(lmv->tgts[i].ltd_exp, fid,
2877                                        policy, mode, flags, opaque);
2878                 if (!rc)
2879                         rc = err;
2880         }
2881         RETURN(rc);
2882 }
2883
2884 int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
2885                       __u64 *bits)
2886 {
2887         struct obd_device       *obd = exp->exp_obd;
2888         struct lmv_obd          *lmv = &obd->u.lmv;
2889         int                      rc;
2890         ENTRY;
2891
2892         rc =  md_set_lock_data(lmv->tgts[0].ltd_exp, lockh, data, bits);
2893         RETURN(rc);
2894 }
2895
2896 ldlm_mode_t lmv_lock_match(struct obd_export *exp, int flags,
2897                            const struct lu_fid *fid, ldlm_type_t type,
2898                            ldlm_policy_data_t *policy, ldlm_mode_t mode,
2899                            struct lustre_handle *lockh)
2900 {
2901         struct obd_device       *obd = exp->exp_obd;
2902         struct lmv_obd          *lmv = &obd->u.lmv;
2903         ldlm_mode_t              rc;
2904         int                      i;
2905         ENTRY;
2906
2907         CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
2908
2909         /*
2910          * With CMD every object can have two locks in different namespaces:
2911          * lookup lock in space of mds storing direntry and update/open lock in
2912          * space of mds storing inode. Thus we check all targets, not only that
2913          * one fid was created in.
2914          */
2915         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2916                 rc = md_lock_match(lmv->tgts[i].ltd_exp, flags, fid,
2917                                    type, policy, mode, lockh);
2918                 if (rc)
2919                         RETURN(rc);
2920         }
2921
2922         RETURN(0);
2923 }
2924
2925 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
2926                       struct obd_export *dt_exp, struct obd_export *md_exp,
2927                       struct lustre_md *md)
2928 {
2929         struct obd_device       *obd = exp->exp_obd;
2930         struct lmv_obd          *lmv = &obd->u.lmv;
2931         int                      rc;
2932         ENTRY;
2933         rc = md_get_lustre_md(lmv->tgts[0].ltd_exp, req, dt_exp, md_exp, md);
2934         RETURN(rc);
2935 }
2936
2937 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
2938 {
2939         struct obd_device       *obd = exp->exp_obd;
2940         struct lmv_obd          *lmv = &obd->u.lmv;
2941         ENTRY;
2942
2943         if (md->mea)
2944                 obd_free_memmd(exp, (void *)&md->mea);
2945         RETURN(md_free_lustre_md(lmv->tgts[0].ltd_exp, md));
2946 }
2947
2948 int lmv_set_open_replay_data(struct obd_export *exp,
2949                              struct obd_client_handle *och,
2950                              struct ptlrpc_request *open_req)
2951 {
2952         struct obd_device       *obd = exp->exp_obd;
2953         struct lmv_obd          *lmv = &obd->u.lmv;
2954         struct lmv_tgt_desc     *tgt;
2955         ENTRY;
2956
2957         tgt = lmv_find_target(lmv, &och->och_fid);
2958         if (IS_ERR(tgt))
2959                 RETURN(PTR_ERR(tgt));
2960
2961         RETURN(md_set_open_replay_data(tgt->ltd_exp, och, open_req));
2962 }
2963
2964 int lmv_clear_open_replay_data(struct obd_export *exp,
2965                                struct obd_client_handle *och)
2966 {
2967         struct obd_device       *obd = exp->exp_obd;
2968         struct lmv_obd          *lmv = &obd->u.lmv;
2969         struct lmv_tgt_desc     *tgt;
2970         ENTRY;
2971
2972         tgt = lmv_find_target(lmv, &och->och_fid);
2973         if (IS_ERR(tgt))
2974                 RETURN(PTR_ERR(tgt));
2975
2976         RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
2977 }
2978
2979 static int lmv_get_remote_perm(struct obd_export *exp,
2980                                const struct lu_fid *fid,
2981                                struct obd_capa *oc, __u32 suppgid,
2982                                struct ptlrpc_request **request)
2983 {
2984         struct obd_device       *obd = exp->exp_obd;
2985         struct lmv_obd          *lmv = &obd->u.lmv;
2986         struct lmv_tgt_desc     *tgt;
2987         int                      rc;
2988         ENTRY;
2989
2990         rc = lmv_check_connect(obd);
2991         if (rc)
2992                 RETURN(rc);
2993
2994         tgt = lmv_find_target(lmv, fid);
2995         if (IS_ERR(tgt))
2996                 RETURN(PTR_ERR(tgt));
2997
2998         rc = md_get_remote_perm(tgt->ltd_exp, fid, oc, suppgid, request);
2999         RETURN(rc);
3000 }
3001
3002 static int lmv_renew_capa(struct obd_export *exp, struct obd_capa *oc,
3003                           renew_capa_cb_t cb)
3004 {
3005         struct obd_device       *obd = exp->exp_obd;
3006         struct lmv_obd          *lmv = &obd->u.lmv;
3007         struct lmv_tgt_desc     *tgt;
3008         int                      rc;
3009         ENTRY;
3010
3011         rc = lmv_check_connect(obd);
3012         if (rc)
3013                 RETURN(rc);
3014
3015         tgt = lmv_find_target(lmv, &oc->c_capa.lc_fid);
3016         if (IS_ERR(tgt))
3017                 RETURN(PTR_ERR(tgt));
3018
3019         rc = md_renew_capa(tgt->ltd_exp, oc, cb);
3020         RETURN(rc);
3021 }
3022
3023 int lmv_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
3024                     const struct req_msg_field *field, struct obd_capa **oc)
3025 {
3026         struct obd_device *obd = exp->exp_obd;
3027         struct lmv_obd *lmv = &obd->u.lmv;
3028         int rc;
3029
3030         ENTRY;
3031         rc = md_unpack_capa(lmv->tgts[0].ltd_exp, req, field, oc);
3032         RETURN(rc);
3033 }
3034
3035 int lmv_intent_getattr_async(struct obd_export *exp,
3036                              struct md_enqueue_info *minfo,
3037                              struct ldlm_enqueue_info *einfo)
3038 {
3039         struct md_op_data       *op_data = &minfo->mi_data;
3040         struct obd_device       *obd = exp->exp_obd;
3041         struct lmv_obd          *lmv = &obd->u.lmv;
3042         struct lmv_object       *obj;
3043         struct lmv_tgt_desc     *tgt = NULL;
3044         int                      rc;
3045         int                      sidx;
3046         ENTRY;
3047
3048         rc = lmv_check_connect(obd);
3049         if (rc)
3050                 RETURN(rc);
3051
3052         if (op_data->op_namelen) {
3053                 obj = lmv_object_find(obd, &op_data->op_fid1);
3054                 if (obj) {
3055                         sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
3056                                             (char *)op_data->op_name,
3057                                             op_data->op_namelen);
3058                         op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
3059                         tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
3060                         lmv_object_put(obj);
3061                 }
3062         }
3063
3064         if (tgt == NULL)
3065                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
3066
3067         if (IS_ERR(tgt))
3068                 RETURN(PTR_ERR(tgt));
3069
3070         rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
3071         RETURN(rc);
3072 }
3073
3074 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
3075                         struct lu_fid *fid, __u64 *bits)
3076 {
3077         struct obd_device       *obd = exp->exp_obd;
3078         struct lmv_obd          *lmv = &obd->u.lmv;
3079         struct lmv_tgt_desc     *tgt;
3080         int                      rc;
3081         ENTRY;
3082
3083         rc = lmv_check_connect(obd);
3084         if (rc)
3085                 RETURN(rc);
3086
3087         tgt = lmv_find_target(lmv, fid);
3088         if (IS_ERR(tgt))
3089                 RETURN(PTR_ERR(tgt));
3090
3091         rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
3092         RETURN(rc);
3093 }
3094
3095 /**
3096  * For lmv, only need to send request to master MDT, and the master MDT will
3097  * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
3098  * we directly fetch data from the slave MDTs.
3099  */
3100 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
3101                  struct obd_quotactl *oqctl)
3102 {
3103         struct obd_device   *obd = class_exp2obd(exp);
3104         struct lmv_obd      *lmv = &obd->u.lmv;
3105         struct lmv_tgt_desc *tgt = &lmv->tgts[0];
3106         int                  rc = 0, i;
3107         __u64                curspace, curinodes;
3108         ENTRY;
3109
3110         if (!lmv->desc.ld_tgt_count || !tgt->ltd_active) {
3111                 CERROR("master lmv inactive\n");
3112                 RETURN(-EIO);
3113         }
3114
3115         if (oqctl->qc_cmd != Q_GETOQUOTA) {
3116                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
3117                 RETURN(rc);
3118         }
3119
3120         curspace = curinodes = 0;
3121         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3122                 int err;
3123                 tgt = &lmv->tgts[i];
3124
3125                 if (tgt->ltd_exp == NULL)
3126                         continue;
3127                 if (!tgt->ltd_active) {
3128                         CDEBUG(D_HA, "mdt %d is inactive.\n", i);
3129                         continue;
3130                 }
3131
3132                 err = obd_quotactl(tgt->ltd_exp, oqctl);
3133                 if (err) {
3134                         CERROR("getquota on mdt %d failed. %d\n", i, err);
3135                         if (!rc)
3136                                 rc = err;
3137                 } else {
3138                         curspace += oqctl->qc_dqblk.dqb_curspace;
3139                         curinodes += oqctl->qc_dqblk.dqb_curinodes;
3140                 }
3141         }
3142         oqctl->qc_dqblk.dqb_curspace = curspace;
3143         oqctl->qc_dqblk.dqb_curinodes = curinodes;
3144
3145         RETURN(rc);
3146 }
3147
3148 int lmv_quotacheck(struct obd_device *unused, struct obd_export *exp,
3149                    struct obd_quotactl *oqctl)
3150 {
3151         struct obd_device   *obd = class_exp2obd(exp);
3152         struct lmv_obd      *lmv = &obd->u.lmv;
3153         struct lmv_tgt_desc *tgt;
3154         int                  i, rc = 0;
3155         ENTRY;
3156
3157         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
3158                 int err;
3159
3160                 if (!tgt->ltd_active) {
3161                         CERROR("lmv idx %d inactive\n", i);
3162                         RETURN(-EIO);
3163                 }
3164
3165                 err = obd_quotacheck(tgt->ltd_exp, oqctl);
3166                 if (err && !rc)
3167                         rc = err;
3168         }
3169
3170         RETURN(rc);
3171 }
3172
3173 struct obd_ops lmv_obd_ops = {
3174         .o_owner                = THIS_MODULE,
3175         .o_setup                = lmv_setup,
3176         .o_cleanup              = lmv_cleanup,
3177         .o_precleanup           = lmv_precleanup,
3178         .o_process_config       = lmv_process_config,
3179         .o_connect              = lmv_connect,
3180         .o_disconnect           = lmv_disconnect,
3181         .o_statfs               = lmv_statfs,
3182         .o_get_info             = lmv_get_info,
3183         .o_set_info_async       = lmv_set_info_async,
3184         .o_packmd               = lmv_packmd,
3185         .o_unpackmd             = lmv_unpackmd,
3186         .o_notify               = lmv_notify,
3187         .o_get_uuid             = lmv_get_uuid,
3188         .o_iocontrol            = lmv_iocontrol,
3189         .o_fid_delete           = lmv_fid_delete,
3190         .o_quotacheck           = lmv_quotacheck,
3191         .o_quotactl             = lmv_quotactl
3192 };
3193
3194 struct md_ops lmv_md_ops = {
3195         .m_getstatus            = lmv_getstatus,
3196         .m_change_cbdata        = lmv_change_cbdata,
3197         .m_find_cbdata          = lmv_find_cbdata,
3198         .m_close                = lmv_close,
3199         .m_create               = lmv_create,
3200         .m_done_writing         = lmv_done_writing,
3201         .m_enqueue              = lmv_enqueue,
3202         .m_getattr              = lmv_getattr,
3203         .m_getxattr             = lmv_getxattr,
3204         .m_getattr_name         = lmv_getattr_name,
3205         .m_intent_lock          = lmv_intent_lock,
3206         .m_link                 = lmv_link,
3207         .m_rename               = lmv_rename,
3208         .m_setattr              = lmv_setattr,
3209         .m_setxattr             = lmv_setxattr,
3210         .m_sync                 = lmv_sync,
3211         .m_readpage             = lmv_readpage,
3212         .m_unlink               = lmv_unlink,
3213         .m_init_ea_size         = lmv_init_ea_size,
3214         .m_cancel_unused        = lmv_cancel_unused,
3215         .m_set_lock_data        = lmv_set_lock_data,
3216         .m_lock_match           = lmv_lock_match,
3217         .m_get_lustre_md        = lmv_get_lustre_md,
3218         .m_free_lustre_md       = lmv_free_lustre_md,
3219         .m_set_open_replay_data = lmv_set_open_replay_data,
3220         .m_clear_open_replay_data = lmv_clear_open_replay_data,
3221         .m_renew_capa           = lmv_renew_capa,
3222         .m_unpack_capa          = lmv_unpack_capa,
3223         .m_get_remote_perm      = lmv_get_remote_perm,
3224         .m_intent_getattr_async = lmv_intent_getattr_async,
3225         .m_revalidate_lock      = lmv_revalidate_lock
3226 };
3227
3228 int __init lmv_init(void)
3229 {
3230         struct lprocfs_static_vars lvars;
3231         int                        rc;
3232
3233         lmv_object_cache = cfs_mem_cache_create("lmv_objects",
3234                                                 sizeof(struct lmv_object),
3235                                                 0, 0);
3236         if (!lmv_object_cache) {
3237                 CERROR("Error allocating lmv objects cache\n");
3238                 return -ENOMEM;
3239         }
3240
3241         lprocfs_lmv_init_vars(&lvars);
3242
3243         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
3244                                  lvars.module_vars, LUSTRE_LMV_NAME, NULL);
3245         if (rc)
3246                 cfs_mem_cache_destroy(lmv_object_cache);
3247
3248         return rc;
3249 }
3250
3251 #ifdef __KERNEL__
3252 static void lmv_exit(void)
3253 {
3254         class_unregister_type(LUSTRE_LMV_NAME);
3255
3256         LASSERTF(cfs_atomic_read(&lmv_object_count) == 0,
3257                  "Can't free lmv objects cache, %d object(s) busy\n",
3258                  cfs_atomic_read(&lmv_object_count));
3259         cfs_mem_cache_destroy(lmv_object_cache);
3260 }
3261
3262 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3263 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
3264 MODULE_LICENSE("GPL");
3265
3266 module_init(lmv_init);
3267 module_exit(lmv_exit);
3268 #endif