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, Intel Corporation.
  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/lustre_idl.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 static void lmv_activate_target(struct lmv_obd *lmv,
  63                                 struct lmv_tgt_desc *tgt,
  64                                 int activate)
  65 {
  66         if (tgt->ltd_active == activate)
  67                 return;
  68
  69         tgt->ltd_active = activate;
  70         lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
  71 }
  72
  73 /**
  74  * Error codes:
  75  *
  76  *  -EINVAL  : UUID can't be found in the LMV's target list
  77  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
  78  *  -EBADF   : The UUID is found, but the OBD of the wrong type (!)
  79  */
  80 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
  81                               int activate)
  82 {
  83         struct lmv_tgt_desc    *tgt;
  84         struct obd_device      *obd;
  85         int                     i;
  86         int                     rc = 0;
  87         ENTRY;
  88
  89         CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
  90                lmv, uuid->uuid, activate);
  91
  92         spin_lock(&lmv->lmv_lock);
  93         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
  94                 tgt = lmv->tgts[i];
  95                 if (tgt == NULL || tgt->ltd_exp == NULL)
  96                         continue;
  97
  98                 CDEBUG(D_INFO, "Target idx %d is %s conn "LPX64"\n", i,
  99                        tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
 100
 101                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 102                         break;
 103         }
 104
 105         if (i == lmv->desc.ld_tgt_count)
 106                 GOTO(out_lmv_lock, rc = -EINVAL);
 107
 108         obd = class_exp2obd(tgt->ltd_exp);
 109         if (obd == NULL)
 110                 GOTO(out_lmv_lock, rc = -ENOTCONN);
 111
 112         CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
 113                obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
 114                obd->obd_type->typ_name, i);
 115         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
 116
 117         if (tgt->ltd_active == activate) {
 118                 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
 119                        activate ? "" : "in");
 120                 GOTO(out_lmv_lock, rc);
 121         }
 122
 123         CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
 124                activate ? "" : "in");
 125         lmv_activate_target(lmv, tgt, activate);
 126         EXIT;
 127
 128  out_lmv_lock:
 129         spin_unlock(&lmv->lmv_lock);
 130         return rc;
 131 }
 132
 133 struct obd_uuid *lmv_get_uuid(struct obd_export *exp)
 134 {
 135         struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
 136
 137         return obd_get_uuid(lmv->tgts[0]->ltd_exp);
 138 }
 139
 140 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
 141                       enum obd_notify_event ev, void *data)
 142 {
 143         struct obd_connect_data *conn_data;
 144         struct lmv_obd          *lmv = &obd->u.lmv;
 145         struct obd_uuid         *uuid;
 146         int                      rc = 0;
 147         ENTRY;
 148
 149         if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 150                 CERROR("unexpected notification of %s %s!\n",
 151                        watched->obd_type->typ_name,
 152                        watched->obd_name);
 153                 RETURN(-EINVAL);
 154         }
 155
 156         uuid = &watched->u.cli.cl_target_uuid;
 157         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
 158                 /*
 159                  * Set MDC as active before notifying the observer, so the
 160                  * observer can use the MDC normally.
 161                  */
 162                 rc = lmv_set_mdc_active(lmv, uuid,
 163                                         ev == OBD_NOTIFY_ACTIVE);
 164                 if (rc) {
 165                         CERROR("%sactivation of %s failed: %d\n",
 166                                ev == OBD_NOTIFY_ACTIVE ? "" : "de",
 167                                uuid->uuid, rc);
 168                         RETURN(rc);
 169                 }
 170         } else if (ev == OBD_NOTIFY_OCD) {
 171                 conn_data = &watched->u.cli.cl_import->imp_connect_data;
 172                 /*
 173                  * XXX: Make sure that ocd_connect_flags from all targets are
 174                  * the same. Otherwise one of MDTs runs wrong version or
 175                  * something like this.  --umka
 176                  */
 177                 obd->obd_self_export->exp_connect_data = *conn_data;
 178         }
 179 #if 0
 180         else if (ev == OBD_NOTIFY_DISCON) {
 181                 /*
 182                  * For disconnect event, flush fld cache for failout MDS case.
 183                  */
 184                 fld_client_flush(&lmv->lmv_fld);
 185         }
 186 #endif
 187         /*
 188          * Pass the notification up the chain.
 189          */
 190         if (obd->obd_observer)
 191                 rc = obd_notify(obd->obd_observer, watched, ev, data);
 192
 193         RETURN(rc);
 194 }
 195
 196 /**
 197  * This is fake connect function. Its purpose is to initialize lmv and say
 198  * caller that everything is okay. Real connection will be performed later.
 199  */
 200 static int lmv_connect(const struct lu_env *env,
 201                        struct obd_export **exp, struct obd_device *obd,
 202                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 203                        void *localdata)
 204 {
 205 #ifdef __KERNEL__
 206         struct proc_dir_entry *lmv_proc_dir;
 207 #endif
 208         struct lmv_obd        *lmv = &obd->u.lmv;
 209         struct lustre_handle  conn = { 0 };
 210         int                    rc = 0;
 211         ENTRY;
 212
 213         /*
 214          * We don't want to actually do the underlying connections more than
 215          * once, so keep track.
 216          */
 217         lmv->refcount++;
 218         if (lmv->refcount > 1) {
 219                 *exp = NULL;
 220                 RETURN(0);
 221         }
 222
 223         rc = class_connect(&conn, obd, cluuid);
 224         if (rc) {
 225                 CERROR("class_connection() returned %d\n", rc);
 226                 RETURN(rc);
 227         }
 228
 229         *exp = class_conn2export(&conn);
 230         class_export_get(*exp);
 231
 232         lmv->exp = *exp;
 233         lmv->connected = 0;
 234         lmv->cluuid = *cluuid;
 235
 236         if (data)
 237                 lmv->conn_data = *data;
 238
 239 #ifdef __KERNEL__
 240         lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
 241                                         NULL, NULL);
 242         if (IS_ERR(lmv_proc_dir)) {
 243                 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
 244                        obd->obd_type->typ_name, obd->obd_name);
 245                 lmv_proc_dir = NULL;
 246         }
 247 #endif
 248
 249         /*
 250          * All real clients should perform actual connection right away, because
 251          * it is possible, that LMV will not have opportunity to connect targets
 252          * and MDC stuff will be called directly, for instance while reading
 253          * ../mdc/../kbytesfree procfs file, etc.
 254          */
 255         if (data->ocd_connect_flags & OBD_CONNECT_REAL)
 256                 rc = lmv_check_connect(obd);
 257
 258 #ifdef __KERNEL__
 259         if (rc) {
 260                 if (lmv_proc_dir)
 261                         lprocfs_remove(&lmv_proc_dir);
 262         }
 263 #endif
 264
 265         RETURN(rc);
 266 }
 267
 268 static void lmv_set_timeouts(struct obd_device *obd)
 269 {
 270         struct lmv_tgt_desc   *tgt;
 271         struct lmv_obd        *lmv;
 272         int                    i;
 273
 274         lmv = &obd->u.lmv;
 275         if (lmv->server_timeout == 0)
 276                 return;
 277
 278         if (lmv->connected == 0)
 279                 return;
 280
 281         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 282                 tgt = lmv->tgts[i];
 283                 if (tgt == NULL || tgt->ltd_exp == NULL || tgt->ltd_active == 0)
 284                         continue;
 285
 286                 obd_set_info_async(NULL, tgt->ltd_exp, sizeof(KEY_INTERMDS),
 287                                    KEY_INTERMDS, 0, NULL, NULL);
 288         }
 289 }
 290
 291 static int lmv_init_ea_size(struct obd_export *exp, int easize,
 292                             int def_easize, int cookiesize)
 293 {
 294         struct obd_device   *obd = exp->exp_obd;
 295         struct lmv_obd      *lmv = &obd->u.lmv;
 296         int                  i;
 297         int                  rc = 0;
 298         int                  change = 0;
 299         ENTRY;
 300
 301         if (lmv->max_easize < easize) {
 302                 lmv->max_easize = easize;
 303                 change = 1;
 304         }
 305         if (lmv->max_def_easize < def_easize) {
 306                 lmv->max_def_easize = def_easize;
 307                 change = 1;
 308         }
 309         if (lmv->max_cookiesize < cookiesize) {
 310                 lmv->max_cookiesize = cookiesize;
 311                 change = 1;
 312         }
 313         if (change == 0)
 314                 RETURN(0);
 315
 316         if (lmv->connected == 0)
 317                 RETURN(0);
 318
 319         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 320                 if (lmv->tgts[i] == NULL ||
 321                     lmv->tgts[i]->ltd_exp == NULL ||
 322                     lmv->tgts[i]->ltd_active == 0) {
 323                         CWARN("%s: NULL export for %d\n", obd->obd_name, i);
 324                         continue;
 325                 }
 326
 327                 rc = md_init_ea_size(lmv->tgts[i]->ltd_exp, easize, def_easize,
 328                                      cookiesize);
 329                 if (rc) {
 330                         CERROR("%s: obd_init_ea_size() failed on MDT target %d:"
 331                                " rc = %d.\n", obd->obd_name, i, rc);
 332                         break;
 333                 }
 334         }
 335         RETURN(rc);
 336 }
 337
 338 #define MAX_STRING_SIZE 128
 339
 340 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 341 {
 342 #ifdef __KERNEL__
 343         struct proc_dir_entry   *lmv_proc_dir;
 344 #endif
 345         struct lmv_obd          *lmv = &obd->u.lmv;
 346         struct obd_uuid         *cluuid = &lmv->cluuid;
 347         struct obd_connect_data *mdc_data = NULL;
 348         struct obd_uuid          lmv_mdc_uuid = { "LMV_MDC_UUID" };
 349         struct obd_device       *mdc_obd;
 350         struct obd_export       *mdc_exp;
 351         struct lu_fld_target     target;
 352         int                      rc;
 353         ENTRY;
 354
 355         mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
 356                                         &obd->obd_uuid);
 357         if (!mdc_obd) {
 358                 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
 359                 RETURN(-EINVAL);
 360         }
 361
 362         CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
 363                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 364                 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
 365                 cluuid->uuid);
 366
 367         if (!mdc_obd->obd_set_up) {
 368                 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
 369                 RETURN(-EINVAL);
 370         }
 371
 372         rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
 373                          &lmv->conn_data, NULL);
 374         if (rc) {
 375                 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
 376                 RETURN(rc);
 377         }
 378
 379         /*
 380          * Init fid sequence client for this mdc and add new fld target.
 381          */
 382         rc = obd_fid_init(mdc_obd, mdc_exp, LUSTRE_SEQ_METADATA);
 383         if (rc)
 384                 RETURN(rc);
 385
 386         target.ft_srv = NULL;
 387         target.ft_exp = mdc_exp;
 388         target.ft_idx = tgt->ltd_idx;
 389
 390         fld_client_add_target(&lmv->lmv_fld, &target);
 391
 392         mdc_data = &class_exp2cliimp(mdc_exp)->imp_connect_data;
 393
 394         rc = obd_register_observer(mdc_obd, obd);
 395         if (rc) {
 396                 obd_disconnect(mdc_exp);
 397                 CERROR("target %s register_observer error %d\n",
 398                        tgt->ltd_uuid.uuid, rc);
 399                 RETURN(rc);
 400         }
 401
 402         if (obd->obd_observer) {
 403                 /*
 404                  * Tell the observer about the new target.
 405                  */
 406                 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
 407                                 OBD_NOTIFY_ACTIVE,
 408                                 (void *)(tgt - lmv->tgts[0]));
 409                 if (rc) {
 410                         obd_disconnect(mdc_exp);
 411                         RETURN(rc);
 412                 }
 413         }
 414
 415         tgt->ltd_active = 1;
 416         tgt->ltd_exp = mdc_exp;
 417         lmv->desc.ld_active_tgt_count++;
 418
 419         md_init_ea_size(tgt->ltd_exp, lmv->max_easize,
 420                         lmv->max_def_easize, lmv->max_cookiesize);
 421
 422         CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
 423                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 424                 cfs_atomic_read(&obd->obd_refcount));
 425
 426 #ifdef __KERNEL__
 427         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 428         if (lmv_proc_dir) {
 429                 struct proc_dir_entry *mdc_symlink;
 430
 431                 LASSERT(mdc_obd->obd_type != NULL);
 432                 LASSERT(mdc_obd->obd_type->typ_name != NULL);
 433                 mdc_symlink = lprocfs_add_symlink(mdc_obd->obd_name,
 434                                                   lmv_proc_dir,
 435                                                   "../../../%s/%s",
 436                                                   mdc_obd->obd_type->typ_name,
 437                                                   mdc_obd->obd_name);
 438                 if (mdc_symlink == NULL) {
 439                         CERROR("Could not register LMV target "
 440                                "/proc/fs/lustre/%s/%s/target_obds/%s.",
 441                                obd->obd_type->typ_name, obd->obd_name,
 442                                mdc_obd->obd_name);
 443                         lprocfs_remove(&lmv_proc_dir);
 444                         lmv_proc_dir = NULL;
 445                 }
 446         }
 447 #endif
 448         RETURN(0);
 449 }
 450
 451 static void lmv_del_target(struct lmv_obd *lmv, int index)
 452 {
 453         if (lmv->tgts[index] == NULL)
 454                 return;
 455
 456         OBD_FREE_PTR(lmv->tgts[index]);
 457         lmv->tgts[index] = NULL;
 458         return;
 459 }
 460
 461 static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 462                            __u32 index, int gen)
 463 {
 464         struct lmv_obd      *lmv = &obd->u.lmv;
 465         struct lmv_tgt_desc *tgt;
 466         int                  rc = 0;
 467         ENTRY;
 468
 469         CDEBUG(D_CONFIG, "Target uuid: %s. index %d\n", uuidp->uuid, index);
 470
 471         lmv_init_lock(lmv);
 472
 473         if (lmv->desc.ld_tgt_count == 0) {
 474                 struct obd_device *mdc_obd;
 475
 476                 mdc_obd = class_find_client_obd(uuidp, LUSTRE_MDC_NAME,
 477                                                 &obd->obd_uuid);
 478                 if (!mdc_obd) {
 479                         lmv_init_unlock(lmv);
 480                         CERROR("%s: Target %s not attached: rc = %d\n",
 481                                obd->obd_name, uuidp->uuid, -EINVAL);
 482                         RETURN(-EINVAL);
 483                 }
 484         }
 485
 486         if ((index < lmv->tgts_size) && (lmv->tgts[index] != NULL)) {
 487                 tgt = lmv->tgts[index];
 488                 CERROR("%s: UUID %s already assigned at LOV target index %d:"
 489                        " rc = %d\n", obd->obd_name,
 490                        obd_uuid2str(&tgt->ltd_uuid), index, -EEXIST);
 491                 lmv_init_unlock(lmv);
 492                 RETURN(-EEXIST);
 493         }
 494
 495         if (index >= lmv->tgts_size) {
 496                 /* We need to reallocate the lmv target array. */
 497                 struct lmv_tgt_desc **newtgts, **old = NULL;
 498                 __u32 newsize = 1;
 499                 __u32 oldsize = 0;
 500
 501                 while (newsize < index + 1)
 502                         newsize = newsize << 1;
 503                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
 504                 if (newtgts == NULL) {
 505                         lmv_init_unlock(lmv);
 506                         RETURN(-ENOMEM);
 507                 }
 508
 509                 if (lmv->tgts_size) {
 510                         memcpy(newtgts, lmv->tgts,
 511                                sizeof(*newtgts) * lmv->tgts_size);
 512                         old = lmv->tgts;
 513                         oldsize = lmv->tgts_size;
 514                 }
 515
 516                 lmv->tgts = newtgts;
 517                 lmv->tgts_size = newsize;
 518                 smp_rmb();
 519                 if (old)
 520                         OBD_FREE(old, sizeof(*old) * oldsize);
 521
 522                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n", lmv->tgts,
 523                        lmv->tgts_size);
 524         }
 525
 526         OBD_ALLOC_PTR(tgt);
 527         if (!tgt) {
 528                 lmv_init_unlock(lmv);
 529                 RETURN(-ENOMEM);
 530         }
 531
 532         mutex_init(&tgt->ltd_fid_mutex);
 533         tgt->ltd_idx = index;
 534         tgt->ltd_uuid = *uuidp;
 535         tgt->ltd_active = 0;
 536         lmv->tgts[index] = tgt;
 537         if (index >= lmv->desc.ld_tgt_count)
 538                 lmv->desc.ld_tgt_count = index + 1;
 539
 540         if (lmv->connected) {
 541                 rc = lmv_connect_mdc(obd, tgt);
 542                 if (rc) {
 543                         spin_lock(&lmv->lmv_lock);
 544                         lmv->desc.ld_tgt_count--;
 545                         memset(tgt, 0, sizeof(*tgt));
 546                         spin_unlock(&lmv->lmv_lock);
 547                 } else {
 548                         int easize = sizeof(struct lmv_stripe_md) +
 549                                      lmv->desc.ld_tgt_count *
 550                                      sizeof(struct lu_fid);
 551                         lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
 552                 }
 553         }
 554
 555         lmv_init_unlock(lmv);
 556         RETURN(rc);
 557 }
 558
 559 int lmv_check_connect(struct obd_device *obd)
 560 {
 561         struct lmv_obd       *lmv = &obd->u.lmv;
 562         struct lmv_tgt_desc  *tgt;
 563         int                   i;
 564         int                   rc;
 565         int                   easize;
 566         ENTRY;
 567
 568         if (lmv->connected)
 569                 RETURN(0);
 570
 571         lmv_init_lock(lmv);
 572         if (lmv->connected) {
 573                 lmv_init_unlock(lmv);
 574                 RETURN(0);
 575         }
 576
 577         if (lmv->desc.ld_tgt_count == 0) {
 578                 lmv_init_unlock(lmv);
 579                 CERROR("%s: no targets configured.\n", obd->obd_name);
 580                 RETURN(-EINVAL);
 581         }
 582
 583         CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
 584                lmv->cluuid.uuid, obd->obd_name);
 585
 586         LASSERT(lmv->tgts != NULL);
 587
 588         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 589                 tgt = lmv->tgts[i];
 590                 if (tgt == NULL)
 591                         continue;
 592                 rc = lmv_connect_mdc(obd, tgt);
 593                 if (rc)
 594                         GOTO(out_disc, rc);
 595         }
 596
 597         lmv_set_timeouts(obd);
 598         class_export_put(lmv->exp);
 599         lmv->connected = 1;
 600         easize = lmv_get_easize(lmv);
 601         lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
 602         lmv_init_unlock(lmv);
 603         RETURN(0);
 604
 605  out_disc:
 606         while (i-- > 0) {
 607                 int rc2;
 608                 tgt = lmv->tgts[i];
 609                 if (tgt == NULL)
 610                         continue;
 611                 tgt->ltd_active = 0;
 612                 if (tgt->ltd_exp) {
 613                         --lmv->desc.ld_active_tgt_count;
 614                         rc2 = obd_disconnect(tgt->ltd_exp);
 615                         if (rc2) {
 616                                 CERROR("LMV target %s disconnect on "
 617                                        "MDC idx %d: error %d\n",
 618                                        tgt->ltd_uuid.uuid, i, rc2);
 619                         }
 620                 }
 621         }
 622         class_disconnect(lmv->exp);
 623         lmv_init_unlock(lmv);
 624         RETURN(rc);
 625 }
 626
 627 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 628 {
 629 #ifdef __KERNEL__
 630         struct proc_dir_entry  *lmv_proc_dir;
 631 #endif
 632         struct lmv_obd         *lmv = &obd->u.lmv;
 633         struct obd_device      *mdc_obd;
 634         int                     rc;
 635         ENTRY;
 636
 637         LASSERT(tgt != NULL);
 638         LASSERT(obd != NULL);
 639
 640         mdc_obd = class_exp2obd(tgt->ltd_exp);
 641
 642         if (mdc_obd) {
 643                 mdc_obd->obd_force = obd->obd_force;
 644                 mdc_obd->obd_fail = obd->obd_fail;
 645                 mdc_obd->obd_no_recov = obd->obd_no_recov;
 646         }
 647
 648 #ifdef __KERNEL__
 649         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 650         if (lmv_proc_dir) {
 651                 struct proc_dir_entry *mdc_symlink;
 652
 653                 mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
 654                 if (mdc_symlink) {
 655                         lprocfs_remove(&mdc_symlink);
 656                 } else {
 657                         CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
 658                                obd->obd_type->typ_name, obd->obd_name,
 659                                mdc_obd->obd_name);
 660                 }
 661         }
 662 #endif
 663         rc = obd_fid_fini(tgt->ltd_exp->exp_obd);
 664         if (rc)
 665                 CERROR("Can't finanize fids factory\n");
 666
 667         CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
 668                tgt->ltd_exp->exp_obd->obd_name,
 669                tgt->ltd_exp->exp_obd->obd_uuid.uuid);
 670
 671         obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
 672         rc = obd_disconnect(tgt->ltd_exp);
 673         if (rc) {
 674                 if (tgt->ltd_active) {
 675                         CERROR("Target %s disconnect error %d\n",
 676                                tgt->ltd_uuid.uuid, rc);
 677                 }
 678         }
 679
 680         lmv_activate_target(lmv, tgt, 0);
 681         tgt->ltd_exp = NULL;
 682         RETURN(0);
 683 }
 684
 685 static int lmv_disconnect(struct obd_export *exp)
 686 {
 687         struct obd_device     *obd = class_exp2obd(exp);
 688 #ifdef __KERNEL__
 689         struct proc_dir_entry *lmv_proc_dir;
 690 #endif
 691         struct lmv_obd        *lmv = &obd->u.lmv;
 692         int                    rc;
 693         int                    i;
 694         ENTRY;
 695
 696         if (!lmv->tgts)
 697                 goto out_local;
 698
 699         /*
 700          * Only disconnect the underlying layers on the final disconnect.
 701          */
 702         lmv->refcount--;
 703         if (lmv->refcount != 0)
 704                 goto out_local;
 705
 706         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 707                 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
 708                         continue;
 709
 710                 lmv_disconnect_mdc(obd, lmv->tgts[i]);
 711         }
 712
 713 #ifdef __KERNEL__
 714         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 715         if (lmv_proc_dir) {
 716                 lprocfs_remove(&lmv_proc_dir);
 717         } else {
 718                 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
 719                        obd->obd_type->typ_name, obd->obd_name);
 720         }
 721 #endif
 722
 723 out_local:
 724         /*
 725          * This is the case when no real connection is established by
 726          * lmv_check_connect().
 727          */
 728         if (!lmv->connected)
 729                 class_export_put(exp);
 730         rc = class_disconnect(exp);
 731         if (lmv->refcount == 0)
 732                 lmv->connected = 0;
 733         RETURN(rc);
 734 }
 735
 736 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 737                          int len, void *karg, void *uarg)
 738 {
 739         struct obd_device    *obddev = class_exp2obd(exp);
 740         struct lmv_obd       *lmv = &obddev->u.lmv;
 741         int                   i = 0;
 742         int                   rc = 0;
 743         int                   set = 0;
 744         int                   count = lmv->desc.ld_tgt_count;
 745         ENTRY;
 746
 747         if (count == 0)
 748                 RETURN(-ENOTTY);
 749
 750         switch (cmd) {
 751         case IOC_OBD_STATFS: {
 752                 struct obd_ioctl_data *data = karg;
 753                 struct obd_device *mdc_obd;
 754                 struct obd_statfs stat_buf = {0};
 755                 __u32 index;
 756
 757                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
 758                 if ((index >= count))
 759                         RETURN(-ENODEV);
 760
 761                 if (lmv->tgts[index] == NULL ||
 762                     lmv->tgts[index]->ltd_active == 0)
 763                         RETURN(-ENODATA);
 764
 765                 mdc_obd = class_exp2obd(lmv->tgts[index]->ltd_exp);
 766                 if (!mdc_obd)
 767                         RETURN(-EINVAL);
 768
 769                 /* copy UUID */
 770                 if (cfs_copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
 771                                      min((int) data->ioc_plen2,
 772                                          (int) sizeof(struct obd_uuid))))
 773                         RETURN(-EFAULT);
 774
 775                 rc = obd_statfs(NULL, lmv->tgts[index]->ltd_exp, &stat_buf,
 776                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 777                                 0);
 778                 if (rc)
 779                         RETURN(rc);
 780                 if (cfs_copy_to_user(data->ioc_pbuf1, &stat_buf,
 781                                      min((int) data->ioc_plen1,
 782                                          (int) sizeof(stat_buf))))
 783                         RETURN(-EFAULT);
 784                 break;
 785         }
 786         case OBD_IOC_QUOTACTL: {
 787                 struct if_quotactl *qctl = karg;
 788                 struct lmv_tgt_desc *tgt = NULL;
 789                 struct obd_quotactl *oqctl;
 790
 791                 if (qctl->qc_valid == QC_MDTIDX) {
 792                         if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
 793                                 RETURN(-EINVAL);
 794
 795                         tgt = lmv->tgts[qctl->qc_idx];
 796                         if (tgt == NULL || tgt->ltd_exp == NULL)
 797                                 RETURN(-EINVAL);
 798                 } else if (qctl->qc_valid == QC_UUID) {
 799                         for (i = 0; i < count; i++) {
 800                                 tgt = lmv->tgts[i];
 801                                 if (tgt == NULL)
 802                                         continue;
 803                                 if (!obd_uuid_equals(&tgt->ltd_uuid,
 804                                                      &qctl->obd_uuid))
 805                                         continue;
 806
 807                                 if (tgt->ltd_exp == NULL)
 808                                         RETURN(-EINVAL);
 809
 810                                 break;
 811                         }
 812                 } else {
 813                         RETURN(-EINVAL);
 814                 }
 815
 816                 if (i >= count)
 817                         RETURN(-EAGAIN);
 818
 819                 LASSERT(tgt && tgt->ltd_exp);
 820                 OBD_ALLOC_PTR(oqctl);
 821                 if (!oqctl)
 822                         RETURN(-ENOMEM);
 823
 824                 QCTL_COPY(oqctl, qctl);
 825                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
 826                 if (rc == 0) {
 827                         QCTL_COPY(qctl, oqctl);
 828                         qctl->qc_valid = QC_MDTIDX;
 829                         qctl->obd_uuid = tgt->ltd_uuid;
 830                 }
 831                 OBD_FREE_PTR(oqctl);
 832                 break;
 833         }
 834         case OBD_IOC_CHANGELOG_SEND:
 835         case OBD_IOC_CHANGELOG_CLEAR: {
 836                 struct ioc_changelog *icc = karg;
 837
 838                 if (icc->icc_mdtindex >= count)
 839                         RETURN(-ENODEV);
 840
 841                 if (lmv->tgts[icc->icc_mdtindex] == NULL ||
 842                     lmv->tgts[icc->icc_mdtindex]->ltd_exp == NULL ||
 843                     lmv->tgts[icc->icc_mdtindex]->ltd_active == 0)
 844                         RETURN(-ENODEV);
 845                 rc = obd_iocontrol(cmd, lmv->tgts[icc->icc_mdtindex]->ltd_exp,
 846                                    sizeof(*icc), icc, NULL);
 847                 break;
 848         }
 849         case LL_IOC_GET_CONNECT_FLAGS: {
 850                 if (lmv->tgts[0] == NULL)
 851                         RETURN(-ENODATA);
 852                 rc = obd_iocontrol(cmd, lmv->tgts[0]->ltd_exp, len, karg, uarg);
 853                 break;
 854         }
 855         case OBD_IOC_FID2PATH: {
 856                 struct getinfo_fid2path *gf;
 857                 struct lmv_tgt_desc     *tgt;
 858
 859                 gf = (struct getinfo_fid2path *)karg;
 860                 tgt = lmv_find_target(lmv, &gf->gf_fid);
 861                 if (IS_ERR(tgt))
 862                         RETURN(PTR_ERR(tgt));
 863                 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
 864                 break;
 865         }
 866         case LL_IOC_HSM_STATE_GET:
 867         case LL_IOC_HSM_STATE_SET:
 868         case LL_IOC_HSM_ACTION:
 869         case LL_IOC_LOV_SWAP_LAYOUTS: {
 870                 struct md_op_data       *op_data = karg;
 871                 struct lmv_tgt_desc     *tgt;
 872
 873                 tgt = lmv_find_target(lmv, &op_data->op_fid1);
 874                 if (!tgt->ltd_exp)
 875                         RETURN(-EINVAL);
 876
 877                 rc = obd_iocontrol(cmd, lmv->tgts[0]->ltd_exp, len, karg, uarg);
 878                 break;
 879         }
 880         default:
 881                 for (i = 0; i < count; i++) {
 882                         struct obd_device *mdc_obd;
 883                         int err;
 884
 885                         if (lmv->tgts[i] == NULL ||
 886                             lmv->tgts[i]->ltd_exp == NULL)
 887                                 continue;
 888                         /* ll_umount_begin() sets force flag but for lmv, not
 889                          * mdc. Let's pass it through */
 890                         mdc_obd = class_exp2obd(lmv->tgts[i]->ltd_exp);
 891                         mdc_obd->obd_force = obddev->obd_force;
 892                         err = obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp, len,
 893                                             karg, uarg);
 894                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
 895                                 RETURN(err);
 896                         } else if (err) {
 897                                 if (lmv->tgts[i]->ltd_active) {
 898                                         CERROR("error: iocontrol MDC %s on MDT"
 899                                                "idx %d cmd %x: err = %d\n",
 900                                                 lmv->tgts[i]->ltd_uuid.uuid,
 901                                                 i, cmd, err);
 902                                         if (!rc)
 903                                                 rc = err;
 904                                 }
 905                         } else
 906                                 set = 1;
 907                 }
 908                 if (!set && !rc)
 909                         rc = -EIO;
 910         }
 911         RETURN(rc);
 912 }
 913
 914 #if 0
 915 static int lmv_all_chars_policy(int count, const char *name,
 916                                 int len)
 917 {
 918         unsigned int c = 0;
 919
 920         while (len > 0)
 921                 c += name[--len];
 922         c = c % count;
 923         return c;
 924 }
 925
 926 static int lmv_nid_policy(struct lmv_obd *lmv)
 927 {
 928         struct obd_import *imp;
 929         __u32              id;
 930
 931         /*
 932          * XXX: To get nid we assume that underlying obd device is mdc.
 933          */
 934         imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
 935         id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
 936         return id % lmv->desc.ld_tgt_count;
 937 }
 938
 939 static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
 940                           placement_policy_t placement)
 941 {
 942         switch (placement) {
 943         case PLACEMENT_CHAR_POLICY:
 944                 return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
 945                                             op_data->op_name,
 946                                             op_data->op_namelen);
 947         case PLACEMENT_NID_POLICY:
 948                 return lmv_nid_policy(lmv);
 949
 950         default:
 951                 break;
 952         }
 953
 954         CERROR("Unsupported placement policy %x\n", placement);
 955         return -EINVAL;
 956 }
 957 #endif
 958
 959 /**
 960  * This is _inode_ placement policy function (not name).
 961  */
 962 static int lmv_placement_policy(struct obd_device *obd,
 963                                 struct md_op_data *op_data,
 964                                 mdsno_t *mds)
 965 {
 966         struct lmv_obd          *lmv = &obd->u.lmv;
 967         ENTRY;
 968
 969         LASSERT(mds != NULL);
 970
 971         if (lmv->desc.ld_tgt_count == 1) {
 972                 *mds = 0;
 973                 RETURN(0);
 974         }
 975
 976         /**
 977          * If stripe_offset is provided during setdirstripe
 978          * (setdirstripe -i xx), xx MDS will be choosen.
 979          */
 980         if (op_data->op_cli_flags & CLI_SET_MEA) {
 981                 struct lmv_user_md *lum;
 982
 983                 lum = (struct lmv_user_md *)op_data->op_data;
 984                 if (lum->lum_type == LMV_STRIPE_TYPE &&
 985                     lum->lum_stripe_offset != -1) {
 986                         if (lum->lum_stripe_offset >= lmv->desc.ld_tgt_count) {
 987                                 CERROR("%s: Stripe_offset %d > MDT count %d:"
 988                                        " rc = %d\n", obd->obd_name,
 989                                        lum->lum_stripe_offset,
 990                                        lmv->desc.ld_tgt_count, -ERANGE);
 991                                 RETURN(-ERANGE);
 992                         }
 993                         *mds = lum->lum_stripe_offset;
 994                         RETURN(0);
 995                 }
 996         }
 997
 998         /* Allocate new fid on target according to operation type and parent
 999          * home mds. */
1000         *mds = op_data->op_mds;
1001         RETURN(0);
1002 }
1003
1004 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid,
1005                     mdsno_t mds)
1006 {
1007         struct lmv_tgt_desc *tgt;
1008         int                  rc;
1009         ENTRY;
1010
1011         tgt = lmv_get_target(lmv, mds);
1012
1013         /*
1014          * New seq alloc and FLD setup should be atomic. Otherwise we may find
1015          * on server that seq in new allocated fid is not yet known.
1016          */
1017         mutex_lock(&tgt->ltd_fid_mutex);
1018
1019         if (tgt == NULL || tgt->ltd_active == 0 || tgt->ltd_exp == NULL)
1020                 GOTO(out, rc = -ENODEV);
1021
1022         /*
1023          * Asking underlaying tgt layer to allocate new fid.
1024          */
1025         rc = obd_fid_alloc(tgt->ltd_exp, fid, NULL);
1026         if (rc > 0) {
1027                 LASSERT(fid_is_sane(fid));
1028                 rc = 0;
1029         }
1030
1031         EXIT;
1032 out:
1033         mutex_unlock(&tgt->ltd_fid_mutex);
1034         return rc;
1035 }
1036
1037 int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1038                   struct md_op_data *op_data)
1039 {
1040         struct obd_device     *obd = class_exp2obd(exp);
1041         struct lmv_obd        *lmv = &obd->u.lmv;
1042         mdsno_t                mds = 0;
1043         int                    rc;
1044         ENTRY;
1045
1046         LASSERT(op_data != NULL);
1047         LASSERT(fid != NULL);
1048
1049         rc = lmv_placement_policy(obd, op_data, &mds);
1050         if (rc) {
1051                 CERROR("Can't get target for allocating fid, "
1052                        "rc %d\n", rc);
1053                 RETURN(rc);
1054         }
1055
1056         rc = __lmv_fid_alloc(lmv, fid, mds);
1057         if (rc) {
1058                 CERROR("Can't alloc new fid, rc %d\n", rc);
1059                 RETURN(rc);
1060         }
1061
1062         RETURN(rc);
1063 }
1064
1065 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1066 {
1067         struct lmv_obd             *lmv = &obd->u.lmv;
1068         struct lprocfs_static_vars  lvars;
1069         struct lmv_desc            *desc;
1070         int                         rc;
1071         ENTRY;
1072
1073         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1074                 CERROR("LMV setup requires a descriptor\n");
1075                 RETURN(-EINVAL);
1076         }
1077
1078         desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1079         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1080                 CERROR("Lmv descriptor size wrong: %d > %d\n",
1081                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1082                 RETURN(-EINVAL);
1083         }
1084
1085         OBD_ALLOC(lmv->tgts, sizeof(*lmv->tgts) * 32);
1086         if (lmv->tgts == NULL)
1087                 RETURN(-ENOMEM);
1088         lmv->tgts_size = 32;
1089
1090         obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1091         lmv->desc.ld_tgt_count = 0;
1092         lmv->desc.ld_active_tgt_count = 0;
1093         lmv->max_cookiesize = 0;
1094         lmv->max_def_easize = 0;
1095         lmv->max_easize = 0;
1096         lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
1097
1098         spin_lock_init(&lmv->lmv_lock);
1099         mutex_init(&lmv->init_mutex);
1100
1101         lprocfs_lmv_init_vars(&lvars);
1102
1103         lprocfs_obd_setup(obd, lvars.obd_vars);
1104 #ifdef LPROCFS
1105         {
1106                 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
1107                                         0444, &lmv_proc_target_fops, obd);
1108                 if (rc)
1109                         CWARN("%s: error adding LMV target_obd file: rc = %d\n",
1110                                obd->obd_name, rc);
1111        }
1112 #endif
1113         rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1114                              LUSTRE_CLI_FLD_HASH_DHT);
1115         if (rc) {
1116                 CERROR("Can't init FLD, err %d\n", rc);
1117                 GOTO(out, rc);
1118         }
1119
1120         RETURN(0);
1121
1122 out:
1123         return rc;
1124 }
1125
1126 static int lmv_cleanup(struct obd_device *obd)
1127 {
1128         struct lmv_obd   *lmv = &obd->u.lmv;
1129         ENTRY;
1130
1131         fld_client_fini(&lmv->lmv_fld);
1132         if (lmv->tgts != NULL) {
1133                 int i;
1134                 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1135                         if (lmv->tgts[i] == NULL)
1136                                 continue;
1137                         lmv_del_target(lmv, i);
1138                 }
1139                 OBD_FREE(lmv->tgts, sizeof(*lmv->tgts) * lmv->tgts_size);
1140                 lmv->tgts_size = 0;
1141         }
1142         RETURN(0);
1143 }
1144
1145 static int lmv_process_config(struct obd_device *obd, obd_count len, void *buf)
1146 {
1147         struct lustre_cfg       *lcfg = buf;
1148         struct obd_uuid         obd_uuid;
1149         int                     gen;
1150         __u32                   index;
1151         int                     rc;
1152         ENTRY;
1153
1154         switch (lcfg->lcfg_command) {
1155         case LCFG_ADD_MDC:
1156                 /* modify_mdc_tgts add 0:lustre-clilmv  1:lustre-MDT0000_UUID
1157                  * 2:0  3:1  4:lustre-MDT0000-mdc_UUID */
1158                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
1159                         GOTO(out, rc = -EINVAL);
1160
1161                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
1162
1163                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1)
1164                         GOTO(out, rc = -EINVAL);
1165                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
1166                         GOTO(out, rc = -EINVAL);
1167                 rc = lmv_add_target(obd, &obd_uuid, index, gen);
1168                 GOTO(out, rc);
1169         default:
1170                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1171                 GOTO(out, rc = -EINVAL);
1172         }
1173 out:
1174         RETURN(rc);
1175 }
1176
1177 static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
1178                       struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1179 {
1180         struct obd_device     *obd = class_exp2obd(exp);
1181         struct lmv_obd        *lmv = &obd->u.lmv;
1182         struct obd_statfs     *temp;
1183         int                    rc = 0;
1184         int                    i;
1185         ENTRY;
1186
1187         rc = lmv_check_connect(obd);
1188         if (rc)
1189                 RETURN(rc);
1190
1191         OBD_ALLOC(temp, sizeof(*temp));
1192         if (temp == NULL)
1193                 RETURN(-ENOMEM);
1194
1195         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1196                 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1197                         continue;
1198
1199                 rc = obd_statfs(env, lmv->tgts[i]->ltd_exp, temp,
1200                                 max_age, flags);
1201                 if (rc) {
1202                         CERROR("can't stat MDS #%d (%s), error %d\n", i,
1203                                lmv->tgts[i]->ltd_exp->exp_obd->obd_name,
1204                                rc);
1205                         GOTO(out_free_temp, rc);
1206                 }
1207
1208                 if (i == 0) {
1209                         *osfs = *temp;
1210                         /* If the statfs is from mount, it will needs
1211                          * retrieve necessary information from MDT0.
1212                          * i.e. mount does not need the merged osfs
1213                          * from all of MDT.
1214                          * And also clients can be mounted as long as
1215                          * MDT0 is in service*/
1216                         if (flags & OBD_STATFS_FOR_MDT0)
1217                                 GOTO(out_free_temp, rc);
1218                 } else {
1219                         osfs->os_bavail += temp->os_bavail;
1220                         osfs->os_blocks += temp->os_blocks;
1221                         osfs->os_ffree += temp->os_ffree;
1222                         osfs->os_files += temp->os_files;
1223                 }
1224         }
1225
1226         EXIT;
1227 out_free_temp:
1228         OBD_FREE(temp, sizeof(*temp));
1229         return rc;
1230 }
1231
1232 static int lmv_getstatus(struct obd_export *exp,
1233                          struct lu_fid *fid,
1234                          struct obd_capa **pc)
1235 {
1236         struct obd_device    *obd = exp->exp_obd;
1237         struct lmv_obd       *lmv = &obd->u.lmv;
1238         int                   rc;
1239         ENTRY;
1240
1241         rc = lmv_check_connect(obd);
1242         if (rc)
1243                 RETURN(rc);
1244
1245         rc = md_getstatus(lmv->tgts[0]->ltd_exp, fid, pc);
1246         RETURN(rc);
1247 }
1248
1249 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1250                         struct obd_capa *oc, obd_valid valid, const char *name,
1251                         const char *input, int input_size, int output_size,
1252                         int flags, struct ptlrpc_request **request)
1253 {
1254         struct obd_device      *obd = exp->exp_obd;
1255         struct lmv_obd         *lmv = &obd->u.lmv;
1256         struct lmv_tgt_desc    *tgt;
1257         int                     rc;
1258         ENTRY;
1259
1260         rc = lmv_check_connect(obd);
1261         if (rc)
1262                 RETURN(rc);
1263
1264         tgt = lmv_find_target(lmv, fid);
1265         if (IS_ERR(tgt))
1266                 RETURN(PTR_ERR(tgt));
1267
1268         rc = md_getxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1269                          input_size, output_size, flags, request);
1270
1271         RETURN(rc);
1272 }
1273
1274 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1275                         struct obd_capa *oc, obd_valid valid, const char *name,
1276                         const char *input, int input_size, int output_size,
1277                         int flags, __u32 suppgid,
1278                         struct ptlrpc_request **request)
1279 {
1280         struct obd_device      *obd = exp->exp_obd;
1281         struct lmv_obd         *lmv = &obd->u.lmv;
1282         struct lmv_tgt_desc    *tgt;
1283         int                     rc;
1284         ENTRY;
1285
1286         rc = lmv_check_connect(obd);
1287         if (rc)
1288                 RETURN(rc);
1289
1290         tgt = lmv_find_target(lmv, fid);
1291         if (IS_ERR(tgt))
1292                 RETURN(PTR_ERR(tgt));
1293
1294         rc = md_setxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1295                          input_size, output_size, flags, suppgid,
1296                          request);
1297
1298         RETURN(rc);
1299 }
1300
1301 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1302                        struct ptlrpc_request **request)
1303 {
1304         struct obd_device       *obd = exp->exp_obd;
1305         struct lmv_obd          *lmv = &obd->u.lmv;
1306         struct lmv_tgt_desc     *tgt;
1307         int                      rc;
1308         ENTRY;
1309
1310         rc = lmv_check_connect(obd);
1311         if (rc)
1312                 RETURN(rc);
1313
1314         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1315         if (IS_ERR(tgt))
1316                 RETURN(PTR_ERR(tgt));
1317
1318         if (op_data->op_flags & MF_GET_MDT_IDX) {
1319                 op_data->op_mds = tgt->ltd_idx;
1320                 RETURN(0);
1321         }
1322
1323         rc = md_getattr(tgt->ltd_exp, op_data, request);
1324
1325         RETURN(rc);
1326 }
1327
1328 static int lmv_change_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1329                              ldlm_iterator_t it, void *data)
1330 {
1331         struct obd_device   *obd = exp->exp_obd;
1332         struct lmv_obd      *lmv = &obd->u.lmv;
1333         int                  i;
1334         int                  rc;
1335         ENTRY;
1336
1337         rc = lmv_check_connect(obd);
1338         if (rc)
1339                 RETURN(rc);
1340
1341         CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1342
1343         /*
1344          * With DNE every object can have two locks in different namespaces:
1345          * lookup lock in space of MDT storing direntry and update/open lock in
1346          * space of MDT storing inode.
1347          */
1348         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1349                 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1350                         continue;
1351                 md_change_cbdata(lmv->tgts[i]->ltd_exp, fid, it, data);
1352         }
1353
1354         RETURN(0);
1355 }
1356
1357 static int lmv_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1358                            ldlm_iterator_t it, void *data)
1359 {
1360         struct obd_device   *obd = exp->exp_obd;
1361         struct lmv_obd      *lmv = &obd->u.lmv;
1362         int                  i;
1363         int                  rc;
1364         ENTRY;
1365
1366         rc = lmv_check_connect(obd);
1367         if (rc)
1368                 RETURN(rc);
1369
1370         CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1371
1372         /*
1373          * With DNE every object can have two locks in different namespaces:
1374          * lookup lock in space of MDT storing direntry and update/open lock in
1375          * space of MDT storing inode.
1376          */
1377         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1378                 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1379                         continue;
1380                 rc = md_find_cbdata(lmv->tgts[i]->ltd_exp, fid, it, data);
1381                 if (rc)
1382                         RETURN(rc);
1383         }
1384
1385         RETURN(rc);
1386 }
1387
1388
1389 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1390                      struct md_open_data *mod, struct ptlrpc_request **request)
1391 {
1392         struct obd_device     *obd = exp->exp_obd;
1393         struct lmv_obd        *lmv = &obd->u.lmv;
1394         struct lmv_tgt_desc   *tgt;
1395         int                    rc;
1396         ENTRY;
1397
1398         rc = lmv_check_connect(obd);
1399         if (rc)
1400                 RETURN(rc);
1401
1402         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1403         if (IS_ERR(tgt))
1404                 RETURN(PTR_ERR(tgt));
1405
1406         CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1407         rc = md_close(tgt->ltd_exp, op_data, mod, request);
1408         RETURN(rc);
1409 }
1410
1411 struct lmv_tgt_desc
1412 *lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1413                 struct lu_fid *fid)
1414 {
1415         struct lmv_tgt_desc *tgt;
1416
1417         tgt = lmv_find_target(lmv, fid);
1418         op_data->op_mds = tgt->ltd_idx;
1419
1420         return tgt;
1421 }
1422
1423 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1424                const void *data, int datalen, int mode, __u32 uid,
1425                __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1426                struct ptlrpc_request **request)
1427 {
1428         struct obd_device       *obd = exp->exp_obd;
1429         struct lmv_obd          *lmv = &obd->u.lmv;
1430         struct lmv_tgt_desc     *tgt;
1431         int                      rc;
1432         ENTRY;
1433
1434         rc = lmv_check_connect(obd);
1435         if (rc)
1436                 RETURN(rc);
1437
1438         if (!lmv->desc.ld_active_tgt_count)
1439                 RETURN(-EIO);
1440
1441         tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1442         if (IS_ERR(tgt))
1443                 RETURN(PTR_ERR(tgt));
1444
1445         rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
1446         if (rc)
1447                 RETURN(rc);
1448
1449         CDEBUG(D_INODE, "CREATE '%*s' on "DFID" -> mds #%x\n",
1450                op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1451                op_data->op_mds);
1452
1453         op_data->op_flags |= MF_MDC_CANCEL_FID1;
1454         rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1455                        cap_effective, rdev, request);
1456
1457         if (rc == 0) {
1458                 if (*request == NULL)
1459                         RETURN(rc);
1460                 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1461         }
1462         RETURN(rc);
1463 }
1464
1465 static int lmv_done_writing(struct obd_export *exp,
1466                             struct md_op_data *op_data,
1467                             struct md_open_data *mod)
1468 {
1469         struct obd_device     *obd = exp->exp_obd;
1470         struct lmv_obd        *lmv = &obd->u.lmv;
1471         struct lmv_tgt_desc   *tgt;
1472         int                    rc;
1473         ENTRY;
1474
1475         rc = lmv_check_connect(obd);
1476         if (rc)
1477                 RETURN(rc);
1478
1479         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1480         if (IS_ERR(tgt))
1481                 RETURN(PTR_ERR(tgt));
1482
1483         rc = md_done_writing(tgt->ltd_exp, op_data, mod);
1484         RETURN(rc);
1485 }
1486
1487 static int
1488 lmv_enqueue_remote(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1489                    struct lookup_intent *it, struct md_op_data *op_data,
1490                    struct lustre_handle *lockh, void *lmm, int lmmsize,
1491                    int extra_lock_flags)
1492 {
1493         struct ptlrpc_request      *req = it->d.lustre.it_data;
1494         struct obd_device          *obd = exp->exp_obd;
1495         struct lmv_obd             *lmv = &obd->u.lmv;
1496         struct lustre_handle        plock;
1497         struct lmv_tgt_desc        *tgt;
1498         struct md_op_data          *rdata;
1499         struct lu_fid               fid1;
1500         struct mdt_body            *body;
1501         int                         rc = 0;
1502         int                         pmode;
1503         ENTRY;
1504
1505         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1506         LASSERT(body != NULL);
1507
1508         if (!(body->valid & OBD_MD_MDS))
1509                 RETURN(0);
1510
1511         CDEBUG(D_INODE, "REMOTE_ENQUEUE '%s' on "DFID" -> "DFID"\n",
1512                LL_IT2STR(it), PFID(&op_data->op_fid1), PFID(&body->fid1));
1513
1514         /*
1515          * We got LOOKUP lock, but we really need attrs.
1516          */
1517         pmode = it->d.lustre.it_lock_mode;
1518         LASSERT(pmode != 0);
1519         memcpy(&plock, lockh, sizeof(plock));
1520         it->d.lustre.it_lock_mode = 0;
1521         it->d.lustre.it_data = NULL;
1522         fid1 = body->fid1;
1523
1524         it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
1525         ptlrpc_req_finished(req);
1526
1527         tgt = lmv_find_target(lmv, &fid1);
1528         if (IS_ERR(tgt))
1529                 GOTO(out, rc = PTR_ERR(tgt));
1530
1531         OBD_ALLOC_PTR(rdata);
1532         if (rdata == NULL)
1533                 GOTO(out, rc = -ENOMEM);
1534
1535         rdata->op_fid1 = fid1;
1536         rdata->op_bias = MDS_CROSS_REF;
1537
1538         rc = md_enqueue(tgt->ltd_exp, einfo, it, rdata, lockh,
1539                         lmm, lmmsize, NULL, extra_lock_flags);
1540         OBD_FREE_PTR(rdata);
1541         EXIT;
1542 out:
1543         ldlm_lock_decref(&plock, pmode);
1544         return rc;
1545 }
1546
1547 static int
1548 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1549             struct lookup_intent *it, struct md_op_data *op_data,
1550             struct lustre_handle *lockh, void *lmm, int lmmsize,
1551             struct ptlrpc_request **req, __u64 extra_lock_flags)
1552 {
1553         struct obd_device        *obd = exp->exp_obd;
1554         struct lmv_obd           *lmv = &obd->u.lmv;
1555         struct lmv_tgt_desc      *tgt;
1556         int                       rc;
1557         ENTRY;
1558
1559         rc = lmv_check_connect(obd);
1560         if (rc)
1561                 RETURN(rc);
1562
1563         CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
1564                LL_IT2STR(it), PFID(&op_data->op_fid1));
1565
1566         tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1567         if (IS_ERR(tgt))
1568                 RETURN(PTR_ERR(tgt));
1569
1570         CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%d\n",
1571                LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
1572
1573         rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data, lockh,
1574                         lmm, lmmsize, req, extra_lock_flags);
1575
1576         if (rc == 0 && it && it->it_op == IT_OPEN) {
1577                 rc = lmv_enqueue_remote(exp, einfo, it, op_data, lockh,
1578                                         lmm, lmmsize, extra_lock_flags);
1579         }
1580         RETURN(rc);
1581 }
1582
1583 static int
1584 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1585                  struct ptlrpc_request **request)
1586 {
1587         struct ptlrpc_request   *req = NULL;
1588         struct obd_device       *obd = exp->exp_obd;
1589         struct lmv_obd          *lmv = &obd->u.lmv;
1590         struct lmv_tgt_desc     *tgt;
1591         struct mdt_body         *body;
1592         int                      rc;
1593         ENTRY;
1594
1595         rc = lmv_check_connect(obd);
1596         if (rc)
1597                 RETURN(rc);
1598
1599         tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1600         if (IS_ERR(tgt))
1601                 RETURN(PTR_ERR(tgt));
1602
1603         CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" -> mds #%d\n",
1604                op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1605                tgt->ltd_idx);
1606
1607         rc = md_getattr_name(tgt->ltd_exp, op_data, request);
1608         if (rc != 0)
1609                 RETURN(rc);
1610
1611         body = req_capsule_server_get(&(*request)->rq_pill,
1612                                       &RMF_MDT_BODY);
1613         LASSERT(body != NULL);
1614
1615         if (body->valid & OBD_MD_MDS) {
1616                 struct lu_fid rid = body->fid1;
1617                 CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1618                        PFID(&rid));
1619
1620                 tgt = lmv_find_target(lmv, &rid);
1621                 if (IS_ERR(tgt)) {
1622                         ptlrpc_req_finished(*request);
1623                         RETURN(PTR_ERR(tgt));
1624                 }
1625
1626                 op_data->op_fid1 = rid;
1627                 op_data->op_valid |= OBD_MD_FLCROSSREF;
1628                 op_data->op_namelen = 0;
1629                 op_data->op_name = NULL;
1630                 rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
1631                 ptlrpc_req_finished(*request);
1632                 *request = req;
1633         }
1634
1635         RETURN(rc);
1636 }
1637
1638 #define md_op_data_fid(op_data, fl)                     \
1639         (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1640          fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1641          fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1642          fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1643          NULL)
1644
1645 static int lmv_early_cancel(struct obd_export *exp, struct md_op_data *op_data,
1646                             int op_tgt, ldlm_mode_t mode, int bits, int flag)
1647 {
1648         struct lu_fid          *fid = md_op_data_fid(op_data, flag);
1649         struct obd_device      *obd = exp->exp_obd;
1650         struct lmv_obd         *lmv = &obd->u.lmv;
1651         struct lmv_tgt_desc    *tgt;
1652         ldlm_policy_data_t      policy = {{0}};
1653         int                     rc = 0;
1654         ENTRY;
1655
1656         if (!fid_is_sane(fid))
1657                 RETURN(0);
1658
1659         tgt = lmv_find_target(lmv, fid);
1660         if (IS_ERR(tgt))
1661                 RETURN(PTR_ERR(tgt));
1662
1663         if (tgt->ltd_idx != op_tgt) {
1664                 CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1665                 policy.l_inodebits.bits = bits;
1666                 rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1667                                       mode, LCF_ASYNC, NULL);
1668         } else {
1669                 CDEBUG(D_INODE,
1670                        "EARLY_CANCEL skip operation target %d on "DFID"\n",
1671                        op_tgt, PFID(fid));
1672                 op_data->op_flags |= flag;
1673                 rc = 0;
1674         }
1675
1676         RETURN(rc);
1677 }
1678
1679 /*
1680  * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1681  * op_data->op_fid2
1682  */
1683 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1684                     struct ptlrpc_request **request)
1685 {
1686         struct obd_device       *obd = exp->exp_obd;
1687         struct lmv_obd          *lmv = &obd->u.lmv;
1688         struct lmv_tgt_desc     *tgt;
1689         int                      rc;
1690         ENTRY;
1691
1692         rc = lmv_check_connect(obd);
1693         if (rc)
1694                 RETURN(rc);
1695
1696         LASSERT(op_data->op_namelen != 0);
1697
1698         CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
1699                PFID(&op_data->op_fid2), op_data->op_namelen,
1700                op_data->op_name, PFID(&op_data->op_fid1));
1701
1702         op_data->op_fsuid = cfs_curproc_fsuid();
1703         op_data->op_fsgid = cfs_curproc_fsgid();
1704         op_data->op_cap = cfs_curproc_cap_pack();
1705         tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
1706         if (IS_ERR(tgt))
1707                 RETURN(PTR_ERR(tgt));
1708
1709         /*
1710          * Cancel UPDATE lock on child (fid1).
1711          */
1712         op_data->op_flags |= MF_MDC_CANCEL_FID2;
1713         rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
1714                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
1715         if (rc != 0)
1716                 RETURN(rc);
1717
1718         rc = md_link(tgt->ltd_exp, op_data, request);
1719
1720         RETURN(rc);
1721 }
1722
1723 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
1724                       const char *old, int oldlen, const char *new, int newlen,
1725                       struct ptlrpc_request **request)
1726 {
1727         struct obd_device       *obd = exp->exp_obd;
1728         struct lmv_obd          *lmv = &obd->u.lmv;
1729         struct lmv_tgt_desc     *src_tgt;
1730         struct lmv_tgt_desc     *tgt_tgt;
1731         int                     rc;
1732         ENTRY;
1733
1734         LASSERT(oldlen != 0);
1735
1736         CDEBUG(D_INODE, "RENAME %*s in "DFID" to %*s in "DFID"\n",
1737                oldlen, old, PFID(&op_data->op_fid1),
1738                newlen, new, PFID(&op_data->op_fid2));
1739
1740         rc = lmv_check_connect(obd);
1741         if (rc)
1742                 RETURN(rc);
1743
1744         op_data->op_fsuid = cfs_curproc_fsuid();
1745         op_data->op_fsgid = cfs_curproc_fsgid();
1746         op_data->op_cap = cfs_curproc_cap_pack();
1747         src_tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1748         if (IS_ERR(src_tgt))
1749                 RETURN(PTR_ERR(src_tgt));
1750
1751         tgt_tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
1752         if (IS_ERR(tgt_tgt))
1753                 RETURN(PTR_ERR(tgt_tgt));
1754         /*
1755          * LOOKUP lock on src child (fid3) should also be cancelled for
1756          * src_tgt in mdc_rename.
1757          */
1758         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
1759
1760         /*
1761          * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
1762          * own target.
1763          */
1764         rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
1765                               LCK_EX, MDS_INODELOCK_UPDATE,
1766                               MF_MDC_CANCEL_FID2);
1767
1768         /*
1769          * Cancel LOOKUP locks on tgt child (fid4) for parent tgt_tgt.
1770          */
1771         if (rc == 0) {
1772                 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
1773                                       LCK_EX, MDS_INODELOCK_LOOKUP,
1774                                       MF_MDC_CANCEL_FID4);
1775         }
1776
1777         /*
1778          * Cancel all the locks on tgt child (fid4).
1779          */
1780         if (rc == 0)
1781                 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
1782                                       LCK_EX, MDS_INODELOCK_FULL,
1783                                       MF_MDC_CANCEL_FID4);
1784
1785         if (rc == 0)
1786                 rc = md_rename(src_tgt->ltd_exp, op_data, old, oldlen,
1787                                new, newlen, request);
1788         RETURN(rc);
1789 }
1790
1791 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
1792                        void *ea, int ealen, void *ea2, int ea2len,
1793                        struct ptlrpc_request **request,
1794                        struct md_open_data **mod)
1795 {
1796         struct obd_device       *obd = exp->exp_obd;
1797         struct lmv_obd          *lmv = &obd->u.lmv;
1798         struct lmv_tgt_desc     *tgt;
1799         int                      rc = 0;
1800         ENTRY;
1801
1802         rc = lmv_check_connect(obd);
1803         if (rc)
1804                 RETURN(rc);
1805
1806         CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x\n",
1807                PFID(&op_data->op_fid1), op_data->op_attr.ia_valid);
1808
1809         op_data->op_flags |= MF_MDC_CANCEL_FID1;
1810         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1811         if (IS_ERR(tgt))
1812                 RETURN(PTR_ERR(tgt));
1813
1814         rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, ea2,
1815                         ea2len, request, mod);
1816
1817         RETURN(rc);
1818 }
1819
1820 static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
1821                     struct obd_capa *oc, struct ptlrpc_request **request)
1822 {
1823         struct obd_device         *obd = exp->exp_obd;
1824         struct lmv_obd            *lmv = &obd->u.lmv;
1825         struct lmv_tgt_desc       *tgt;
1826         int                        rc;
1827         ENTRY;
1828
1829         rc = lmv_check_connect(obd);
1830         if (rc)
1831                 RETURN(rc);
1832
1833         tgt = lmv_find_target(lmv, fid);
1834         if (IS_ERR(tgt))
1835                 RETURN(PTR_ERR(tgt));
1836
1837         rc = md_sync(tgt->ltd_exp, fid, oc, request);
1838         RETURN(rc);
1839 }
1840
1841 static int lmv_readpage(struct obd_export *exp, struct md_op_data *op_data,
1842                         struct page **pages, struct ptlrpc_request **request)
1843 {
1844         struct obd_device       *obd = exp->exp_obd;
1845         struct lmv_obd          *lmv = &obd->u.lmv;
1846         __u64                    offset = op_data->op_offset;
1847         int                      rc;
1848         int                      i;
1849         /* number of pages read, in CFS_PAGE_SIZE */
1850         int                      nrdpgs;
1851         /* number of pages transferred in LU_PAGE_SIZE */
1852         int                      nlupgs;
1853         struct lmv_tgt_desc     *tgt;
1854         struct lu_dirpage       *dp;
1855         struct lu_dirent        *ent;
1856         ENTRY;
1857
1858         rc = lmv_check_connect(obd);
1859         if (rc)
1860                 RETURN(rc);
1861
1862         CDEBUG(D_INODE, "READPAGE at "LPX64" from "DFID"\n",
1863                offset, PFID(&op_data->op_fid1));
1864
1865         /*
1866          * This case handle directory lookup in clustered metadata case (i.e.
1867          * split directory is located on multiple md servers.)
1868          * each server keeps directory entries for certain range of hashes.
1869          * E.g. we have N server and suppose hash range is 0 to MAX_HASH.
1870          * first server will keep records with hashes [ 0 ... MAX_HASH /N  - 1],
1871          * second one with hashes [MAX_HASH / N ... 2 * MAX_HASH / N] and
1872          * so on....
1873          *      readdir can simply start reading entries from 0 - N server in
1874          * order but that will not scale well as all client will request dir in
1875          * to server in same order.
1876          * Following algorithm does optimization:
1877          * Instead of doing readdir in 1, 2, ...., N order, client with a
1878          * rank R does readdir in R, R + 1, ..., N, 1, ... R - 1 order.
1879          * (every client has rank R)
1880          *      But ll_readdir() expect offset range [0 to MAX_HASH/N) but
1881          * since client ask dir from MDS{R} client has pages with offsets
1882          * [R*MAX_HASH/N ... (R + 1)*MAX_HASH/N] there for we do hash_adj
1883          * on hash  values that we get.
1884          * Since these codes might be still useful for sharded directory, so
1885          * Keeping this code for further reference
1886         if (0) {
1887                 LASSERT(nr > 0);
1888                 seg_size = MAX_HASH_SIZE;
1889                 do_div(seg_size, nr);
1890                 los      = obj->lo_stripes;
1891                 tgt      = lmv_get_target(lmv, los[0].ls_mds);
1892                 rank     = lmv_node_rank(tgt->ltd_exp, fid) % nr;
1893                 tgt_tmp  = offset;
1894                 do_div(tgt_tmp, seg_size);
1895                 tgt0_idx = do_div(tgt_tmp,  nr);
1896                 tgt_idx  = (tgt0_idx + rank) % nr;
1897
1898                 if (tgt_idx < tgt0_idx)
1899                          * Wrap around.
1900                          *
1901                          * Last segment has unusual length due to division
1902                          * rounding.
1903                         hash_adj = MAX_HASH_SIZE - seg_size * nr;
1904                 else
1905                         hash_adj = 0;
1906
1907                 hash_adj += rank * seg_size;
1908
1909                 CDEBUG(D_INODE, "Readpage hash adjustment: %x "LPX64" "
1910                        LPX64"/%x -> "LPX64"/%x\n", rank, hash_adj,
1911                        offset, tgt0_idx, offset + hash_adj, tgt_idx);
1912
1913                 offset = (offset + hash_adj) & MAX_HASH_SIZE;
1914                 rid = lsm->mea_oinfo[tgt_idx].lmo_fid;
1915                 tgt = lmv_get_target(lmv, lsm->mea_oinfo[tgt_idx].lmo_mds);
1916
1917                 CDEBUG(D_INODE, "Forward to "DFID" with offset %lu i %d\n",
1918                        PFID(&rid), (unsigned long)offset, tgt_idx);
1919         }
1920         */
1921         tgt = lmv_find_target(lmv, &op_data->op_fid1);
1922         if (IS_ERR(tgt))
1923                 RETURN(PTR_ERR(tgt));
1924
1925         rc = md_readpage(tgt->ltd_exp, op_data, pages, request);
1926         if (rc != 0)
1927                 RETURN(rc);
1928
1929         nrdpgs = ((*request)->rq_bulk->bd_nob_transferred + CFS_PAGE_SIZE - 1)
1930                  >> CFS_PAGE_SHIFT;
1931         nlupgs = (*request)->rq_bulk->bd_nob_transferred >> LU_PAGE_SHIFT;
1932         LASSERT(!((*request)->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
1933         LASSERT(nrdpgs > 0 && nrdpgs <= op_data->op_npages);
1934
1935         CDEBUG(D_INODE, "read %d(%d)/%d pages\n", nrdpgs, nlupgs,
1936                op_data->op_npages);
1937
1938         for (i = 0; i < nrdpgs; i++) {
1939 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
1940                 struct lu_dirpage *first;
1941                 __u64 hash_end = 0;
1942                 __u32 flags = 0;
1943 #endif
1944                 struct lu_dirent *tmp = NULL;
1945
1946                 dp = cfs_kmap(pages[i]);
1947                 ent = lu_dirent_start(dp);
1948 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
1949                 first = dp;
1950                 hash_end = dp->ldp_hash_end;
1951 repeat:
1952 #endif
1953                 nlupgs--;
1954
1955                 for (tmp = ent; ent != NULL;
1956                      tmp = ent, ent = lu_dirent_next(ent));
1957 #if CFS_PAGE_SIZE > LU_PAGE_SIZE
1958                 dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
1959                 if (((unsigned long)dp & ~CFS_PAGE_MASK) && nlupgs > 0) {
1960                         ent = lu_dirent_start(dp);
1961
1962                         if (tmp) {
1963                                 /* enlarge the end entry lde_reclen from 0 to
1964                                  * first entry of next lu_dirpage, in this way
1965                                  * several lu_dirpages can be stored into one
1966                                  * client page on client. */
1967                                 tmp = ((void *)tmp) +
1968                                       le16_to_cpu(tmp->lde_reclen);
1969                                 tmp->lde_reclen =
1970                                         cpu_to_le16((char *)(dp->ldp_entries) -
1971                                                     (char *)tmp);
1972                                 goto repeat;
1973                         }
1974                 }
1975                 first->ldp_hash_end = hash_end;
1976                 first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
1977                 first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
1978 #else
1979                 SET_BUT_UNUSED(tmp);
1980 #endif
1981                 cfs_kunmap(pages[i]);
1982         }
1983         RETURN(rc);
1984 }
1985
1986 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
1987                       struct ptlrpc_request **request)
1988 {
1989         struct obd_device       *obd = exp->exp_obd;
1990         struct lmv_obd          *lmv = &obd->u.lmv;
1991         struct lmv_tgt_desc     *tgt = NULL;
1992         struct mdt_body         *body;
1993         int                     rc;
1994         ENTRY;
1995
1996         rc = lmv_check_connect(obd);
1997         if (rc)
1998                 RETURN(rc);
1999 retry:
2000         /* Send unlink requests to the MDT where the child is located */
2001         if (likely(!fid_is_zero(&op_data->op_fid2)))
2002                 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
2003         else
2004                 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
2005         if (IS_ERR(tgt))
2006                 RETURN(PTR_ERR(tgt));
2007
2008         op_data->op_fsuid = cfs_curproc_fsuid();
2009         op_data->op_fsgid = cfs_curproc_fsgid();
2010         op_data->op_cap = cfs_curproc_cap_pack();
2011
2012         /*
2013          * If child's fid is given, cancel unused locks for it if it is from
2014          * another export than parent.
2015          *
2016          * LOOKUP lock for child (fid3) should also be cancelled on parent
2017          * tgt_tgt in mdc_unlink().
2018          */
2019         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2020
2021         /*
2022          * Cancel FULL locks on child (fid3).
2023          */
2024         rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2025                               MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2026
2027         if (rc != 0)
2028                 RETURN(rc);
2029
2030         CDEBUG(D_INODE, "unlink with fid="DFID"/"DFID" -> mds #%d\n",
2031                PFID(&op_data->op_fid1), PFID(&op_data->op_fid2), tgt->ltd_idx);
2032
2033         rc = md_unlink(tgt->ltd_exp, op_data, request);
2034         if (rc != 0 && rc != -EREMOTE)
2035                 RETURN(rc);
2036
2037         body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2038         if (body == NULL)
2039                 RETURN(-EPROTO);
2040
2041         /* Not cross-ref case, just get out of here. */
2042         if (likely(!(body->valid & OBD_MD_MDS)))
2043                 RETURN(0);
2044
2045         CDEBUG(D_INODE, "%s: try unlink to another MDT for "DFID"\n",
2046                exp->exp_obd->obd_name, PFID(&body->fid1));
2047
2048         /* This is a remote object, try remote MDT, Note: it may
2049          * try more than 1 time here, Considering following case
2050          * /mnt/lustre is root on MDT0, remote1 is on MDT1
2051          * 1. Initially A does not know where remote1 is, it send
2052          *    unlink RPC to MDT0, MDT0 return -EREMOTE, it will
2053          *    resend unlink RPC to MDT1 (retry 1st time).
2054          *
2055          * 2. During the unlink RPC in flight,
2056          *    client B mv /mnt/lustre/remote1 /mnt/lustre/remote2
2057          *    and create new remote1, but on MDT0
2058          *
2059          * 3. MDT1 get unlink RPC(from A), then do remote lock on
2060          *    /mnt/lustre, then lookup get fid of remote1, and find
2061          *    it is remote dir again, and replay -EREMOTE again.
2062          *
2063          * 4. Then A will resend unlink RPC to MDT0. (retry 2nd times).
2064          *
2065          * In theory, it might try unlimited time here, but it should
2066          * be very rare case.  */
2067         op_data->op_fid2 = body->fid1;
2068         ptlrpc_req_finished(*request);
2069         *request = NULL;
2070
2071         goto retry;
2072 }
2073
2074 static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2075 {
2076         struct lmv_obd *lmv = &obd->u.lmv;
2077         int rc = 0;
2078
2079         switch (stage) {
2080         case OBD_CLEANUP_EARLY:
2081                 /* XXX: here should be calling obd_precleanup() down to
2082                  * stack. */
2083                 break;
2084         case OBD_CLEANUP_EXPORTS:
2085                 fld_client_proc_fini(&lmv->lmv_fld);
2086                 lprocfs_obd_cleanup(obd);
2087                 break;
2088         default:
2089                 break;
2090         }
2091         RETURN(rc);
2092 }
2093
2094 static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
2095                         __u32 keylen, void *key, __u32 *vallen, void *val,
2096                         struct lov_stripe_md *lsm)
2097 {
2098         struct obd_device       *obd;
2099         struct lmv_obd          *lmv;
2100         int                      rc = 0;
2101         ENTRY;
2102
2103         obd = class_exp2obd(exp);
2104         if (obd == NULL) {
2105                 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2106                        exp->exp_handle.h_cookie);
2107                 RETURN(-EINVAL);
2108         }
2109
2110         lmv = &obd->u.lmv;
2111         if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2112                 struct lmv_tgt_desc *tgt;
2113                 int i;
2114
2115                 rc = lmv_check_connect(obd);
2116                 if (rc)
2117                         RETURN(rc);
2118
2119                 LASSERT(*vallen == sizeof(__u32));
2120                 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2121                         tgt = lmv->tgts[i];
2122                         /*
2123                          * All tgts should be connected when this gets called.
2124                          */
2125                         if (tgt == NULL || tgt->ltd_exp == NULL)
2126                                 continue;
2127
2128                         if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
2129                                           vallen, val, NULL))
2130                                 RETURN(0);
2131                 }
2132                 RETURN(-EINVAL);
2133         } else if (KEY_IS(KEY_MAX_EASIZE) || KEY_IS(KEY_CONN_DATA)) {
2134                 rc = lmv_check_connect(obd);
2135                 if (rc)
2136                         RETURN(rc);
2137
2138                 /*
2139                  * Forwarding this request to first MDS, it should know LOV
2140                  * desc.
2141                  */
2142                 rc = obd_get_info(env, lmv->tgts[0]->ltd_exp, keylen, key,
2143                                   vallen, val, NULL);
2144                 if (!rc && KEY_IS(KEY_CONN_DATA))
2145                         exp->exp_connect_data = *(struct obd_connect_data *)val;
2146                 RETURN(rc);
2147         } else if (KEY_IS(KEY_TGT_COUNT)) {
2148                 *((int *)val) = lmv->desc.ld_tgt_count;
2149                 RETURN(0);
2150         }
2151
2152         CDEBUG(D_IOCTL, "Invalid key\n");
2153         RETURN(-EINVAL);
2154 }
2155
2156 int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
2157                        obd_count keylen, void *key, obd_count vallen,
2158                        void *val, struct ptlrpc_request_set *set)
2159 {
2160         struct lmv_tgt_desc    *tgt;
2161         struct obd_device      *obd;
2162         struct lmv_obd         *lmv;
2163         int rc = 0;
2164         ENTRY;
2165
2166         obd = class_exp2obd(exp);
2167         if (obd == NULL) {
2168                 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2169                        exp->exp_handle.h_cookie);
2170                 RETURN(-EINVAL);
2171         }
2172         lmv = &obd->u.lmv;
2173
2174         if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX)) {
2175                 int i, err = 0;
2176
2177                 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2178                         tgt = lmv->tgts[i];
2179
2180                         if (tgt == NULL || tgt->ltd_exp == NULL)
2181                                 continue;
2182
2183                         err = obd_set_info_async(env, tgt->ltd_exp,
2184                                                  keylen, key, vallen, val, set);
2185                         if (err && rc == 0)
2186                                 rc = err;
2187                 }
2188
2189                 RETURN(rc);
2190         }
2191
2192         RETURN(-EINVAL);
2193 }
2194
2195 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
2196                struct lov_stripe_md *lsm)
2197 {
2198         struct obd_device         *obd = class_exp2obd(exp);
2199         struct lmv_obd            *lmv = &obd->u.lmv;
2200         struct lmv_stripe_md      *meap;
2201         struct lmv_stripe_md      *lsmp;
2202         int                        mea_size;
2203         int                        i;
2204         ENTRY;
2205
2206         mea_size = lmv_get_easize(lmv);
2207         if (!lmmp)
2208                 RETURN(mea_size);
2209
2210         if (*lmmp && !lsm) {
2211                 OBD_FREE_LARGE(*lmmp, mea_size);
2212                 *lmmp = NULL;
2213                 RETURN(0);
2214         }
2215
2216         if (*lmmp == NULL) {
2217                 OBD_ALLOC_LARGE(*lmmp, mea_size);
2218                 if (*lmmp == NULL)
2219                         RETURN(-ENOMEM);
2220         }
2221
2222         if (!lsm)
2223                 RETURN(mea_size);
2224
2225         lsmp = (struct lmv_stripe_md *)lsm;
2226         meap = (struct lmv_stripe_md *)*lmmp;
2227
2228         if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
2229             lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
2230                 RETURN(-EINVAL);
2231
2232         meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
2233         meap->mea_count = cpu_to_le32(lsmp->mea_count);
2234         meap->mea_master = cpu_to_le32(lsmp->mea_master);
2235
2236         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2237                 meap->mea_ids[i] = meap->mea_ids[i];
2238                 fid_cpu_to_le(&meap->mea_ids[i], &meap->mea_ids[i]);
2239         }
2240
2241         RETURN(mea_size);
2242 }
2243
2244 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
2245                  struct lov_mds_md *lmm, int lmm_size)
2246 {
2247         struct obd_device          *obd = class_exp2obd(exp);
2248         struct lmv_stripe_md      **tmea = (struct lmv_stripe_md **)lsmp;
2249         struct lmv_stripe_md       *mea = (struct lmv_stripe_md *)lmm;
2250         struct lmv_obd             *lmv = &obd->u.lmv;
2251         int                         mea_size;
2252         int                         i;
2253         __u32                       magic;
2254         ENTRY;
2255
2256         mea_size = lmv_get_easize(lmv);
2257         if (lsmp == NULL)
2258                 return mea_size;
2259
2260         if (*lsmp != NULL && lmm == NULL) {
2261                 OBD_FREE_LARGE(*tmea, mea_size);
2262                 *lsmp = NULL;
2263                 RETURN(0);
2264         }
2265
2266         LASSERT(mea_size == lmm_size);
2267
2268         OBD_ALLOC_LARGE(*tmea, mea_size);
2269         if (*tmea == NULL)
2270                 RETURN(-ENOMEM);
2271
2272         if (!lmm)
2273                 RETURN(mea_size);
2274
2275         if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
2276             mea->mea_magic == MEA_MAGIC_ALL_CHARS ||
2277             mea->mea_magic == MEA_MAGIC_HASH_SEGMENT)
2278         {
2279                 magic = le32_to_cpu(mea->mea_magic);
2280         } else {
2281                 /*
2282                  * Old mea is not handled here.
2283                  */
2284                 CERROR("Old not supportable EA is found\n");
2285                 LBUG();
2286         }
2287
2288         (*tmea)->mea_magic = magic;
2289         (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
2290         (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
2291
2292         for (i = 0; i < (*tmea)->mea_count; i++) {
2293                 (*tmea)->mea_ids[i] = mea->mea_ids[i];
2294                 fid_le_to_cpu(&(*tmea)->mea_ids[i], &(*tmea)->mea_ids[i]);
2295         }
2296         RETURN(mea_size);
2297 }
2298
2299 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
2300                              ldlm_policy_data_t *policy, ldlm_mode_t mode,
2301                              ldlm_cancel_flags_t flags, void *opaque)
2302 {
2303         struct obd_device       *obd = exp->exp_obd;
2304         struct lmv_obd          *lmv = &obd->u.lmv;
2305         int                      rc = 0;
2306         int                      err;
2307         int                      i;
2308         ENTRY;
2309
2310         LASSERT(fid != NULL);
2311
2312         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2313                 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL ||
2314                     lmv->tgts[i]->ltd_active == 0)
2315                         continue;
2316
2317                 err = md_cancel_unused(lmv->tgts[i]->ltd_exp, fid,
2318                                        policy, mode, flags, opaque);
2319                 if (!rc)
2320                         rc = err;
2321         }
2322         RETURN(rc);
2323 }
2324
2325 int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
2326                       __u64 *bits)
2327 {
2328         struct lmv_obd          *lmv = &exp->exp_obd->u.lmv;
2329         int                      rc;
2330         ENTRY;
2331
2332         rc =  md_set_lock_data(lmv->tgts[0]->ltd_exp, lockh, data, bits);
2333         RETURN(rc);
2334 }
2335
2336 ldlm_mode_t lmv_lock_match(struct obd_export *exp, __u64 flags,
2337                            const struct lu_fid *fid, ldlm_type_t type,
2338                            ldlm_policy_data_t *policy, ldlm_mode_t mode,
2339                            struct lustre_handle *lockh)
2340 {
2341         struct obd_device       *obd = exp->exp_obd;
2342         struct lmv_obd          *lmv = &obd->u.lmv;
2343         ldlm_mode_t              rc;
2344         int                      i;
2345         ENTRY;
2346
2347         CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
2348
2349         /*
2350          * With CMD every object can have two locks in different namespaces:
2351          * lookup lock in space of mds storing direntry and update/open lock in
2352          * space of mds storing inode. Thus we check all targets, not only that
2353          * one fid was created in.
2354          */
2355         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2356                 if (lmv->tgts[i] == NULL ||
2357                     lmv->tgts[i]->ltd_exp == NULL ||
2358                     lmv->tgts[i]->ltd_active == 0)
2359                         continue;
2360
2361                 rc = md_lock_match(lmv->tgts[i]->ltd_exp, flags, fid,
2362                                    type, policy, mode, lockh);
2363                 if (rc)
2364                         RETURN(rc);
2365         }
2366
2367         RETURN(0);
2368 }
2369
2370 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
2371                       struct obd_export *dt_exp, struct obd_export *md_exp,
2372                       struct lustre_md *md)
2373 {
2374         struct lmv_obd          *lmv = &exp->exp_obd->u.lmv;
2375
2376         return md_get_lustre_md(lmv->tgts[0]->ltd_exp, req, dt_exp, md_exp, md);
2377 }
2378
2379 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
2380 {
2381         struct obd_device       *obd = exp->exp_obd;
2382         struct lmv_obd          *lmv = &obd->u.lmv;
2383         ENTRY;
2384
2385         if (md->mea)
2386                 obd_free_memmd(exp, (void *)&md->mea);
2387         RETURN(md_free_lustre_md(lmv->tgts[0]->ltd_exp, md));
2388 }
2389
2390 int lmv_set_open_replay_data(struct obd_export *exp,
2391                              struct obd_client_handle *och,
2392                              struct ptlrpc_request *open_req)
2393 {
2394         struct obd_device       *obd = exp->exp_obd;
2395         struct lmv_obd          *lmv = &obd->u.lmv;
2396         struct lmv_tgt_desc     *tgt;
2397         ENTRY;
2398
2399         tgt = lmv_find_target(lmv, &och->och_fid);
2400         if (IS_ERR(tgt))
2401                 RETURN(PTR_ERR(tgt));
2402
2403         RETURN(md_set_open_replay_data(tgt->ltd_exp, och, open_req));
2404 }
2405
2406 int lmv_clear_open_replay_data(struct obd_export *exp,
2407                                struct obd_client_handle *och)
2408 {
2409         struct obd_device       *obd = exp->exp_obd;
2410         struct lmv_obd          *lmv = &obd->u.lmv;
2411         struct lmv_tgt_desc     *tgt;
2412         ENTRY;
2413
2414         tgt = lmv_find_target(lmv, &och->och_fid);
2415         if (IS_ERR(tgt))
2416                 RETURN(PTR_ERR(tgt));
2417
2418         RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
2419 }
2420
2421 static int lmv_get_remote_perm(struct obd_export *exp,
2422                                const struct lu_fid *fid,
2423                                struct obd_capa *oc, __u32 suppgid,
2424                                struct ptlrpc_request **request)
2425 {
2426         struct obd_device       *obd = exp->exp_obd;
2427         struct lmv_obd          *lmv = &obd->u.lmv;
2428         struct lmv_tgt_desc     *tgt;
2429         int                      rc;
2430         ENTRY;
2431
2432         rc = lmv_check_connect(obd);
2433         if (rc)
2434                 RETURN(rc);
2435
2436         tgt = lmv_find_target(lmv, fid);
2437         if (IS_ERR(tgt))
2438                 RETURN(PTR_ERR(tgt));
2439
2440         rc = md_get_remote_perm(tgt->ltd_exp, fid, oc, suppgid, request);
2441         RETURN(rc);
2442 }
2443
2444 static int lmv_renew_capa(struct obd_export *exp, struct obd_capa *oc,
2445                           renew_capa_cb_t cb)
2446 {
2447         struct obd_device       *obd = exp->exp_obd;
2448         struct lmv_obd          *lmv = &obd->u.lmv;
2449         struct lmv_tgt_desc     *tgt;
2450         int                      rc;
2451         ENTRY;
2452
2453         rc = lmv_check_connect(obd);
2454         if (rc)
2455                 RETURN(rc);
2456
2457         tgt = lmv_find_target(lmv, &oc->c_capa.lc_fid);
2458         if (IS_ERR(tgt))
2459                 RETURN(PTR_ERR(tgt));
2460
2461         rc = md_renew_capa(tgt->ltd_exp, oc, cb);
2462         RETURN(rc);
2463 }
2464
2465 int lmv_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
2466                     const struct req_msg_field *field, struct obd_capa **oc)
2467 {
2468         struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2469
2470         return md_unpack_capa(lmv->tgts[0]->ltd_exp, req, field, oc);
2471 }
2472
2473 int lmv_intent_getattr_async(struct obd_export *exp,
2474                              struct md_enqueue_info *minfo,
2475                              struct ldlm_enqueue_info *einfo)
2476 {
2477         struct md_op_data       *op_data = &minfo->mi_data;
2478         struct obd_device       *obd = exp->exp_obd;
2479         struct lmv_obd          *lmv = &obd->u.lmv;
2480         struct lmv_tgt_desc     *tgt = NULL;
2481         int                      rc;
2482         ENTRY;
2483
2484         rc = lmv_check_connect(obd);
2485         if (rc)
2486                 RETURN(rc);
2487
2488         tgt = lmv_find_target(lmv, &op_data->op_fid1);
2489         if (IS_ERR(tgt))
2490                 RETURN(PTR_ERR(tgt));
2491
2492         rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
2493         RETURN(rc);
2494 }
2495
2496 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
2497                         struct lu_fid *fid, __u64 *bits)
2498 {
2499         struct obd_device       *obd = exp->exp_obd;
2500         struct lmv_obd          *lmv = &obd->u.lmv;
2501         struct lmv_tgt_desc     *tgt;
2502         int                      rc;
2503         ENTRY;
2504
2505         rc = lmv_check_connect(obd);
2506         if (rc)
2507                 RETURN(rc);
2508
2509         tgt = lmv_find_target(lmv, fid);
2510         if (IS_ERR(tgt))
2511                 RETURN(PTR_ERR(tgt));
2512
2513         rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
2514         RETURN(rc);
2515 }
2516
2517 /**
2518  * For lmv, only need to send request to master MDT, and the master MDT will
2519  * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
2520  * we directly fetch data from the slave MDTs.
2521  */
2522 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
2523                  struct obd_quotactl *oqctl)
2524 {
2525         struct obd_device   *obd = class_exp2obd(exp);
2526         struct lmv_obd      *lmv = &obd->u.lmv;
2527         struct lmv_tgt_desc *tgt = lmv->tgts[0];
2528         int                  rc = 0, i;
2529         __u64                curspace, curinodes;
2530         ENTRY;
2531
2532         if (!lmv->desc.ld_tgt_count || !tgt->ltd_active) {
2533                 CERROR("master lmv inactive\n");
2534                 RETURN(-EIO);
2535         }
2536
2537         if (oqctl->qc_cmd != Q_GETOQUOTA) {
2538                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
2539                 RETURN(rc);
2540         }
2541
2542         curspace = curinodes = 0;
2543         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2544                 int err;
2545                 tgt = lmv->tgts[i];
2546
2547                 if (tgt == NULL || tgt->ltd_exp == NULL || tgt->ltd_active == 0)
2548                         continue;
2549                 if (!tgt->ltd_active) {
2550                         CDEBUG(D_HA, "mdt %d is inactive.\n", i);
2551                         continue;
2552                 }
2553
2554                 err = obd_quotactl(tgt->ltd_exp, oqctl);
2555                 if (err) {
2556                         CERROR("getquota on mdt %d failed. %d\n", i, err);
2557                         if (!rc)
2558                                 rc = err;
2559                 } else {
2560                         curspace += oqctl->qc_dqblk.dqb_curspace;
2561                         curinodes += oqctl->qc_dqblk.dqb_curinodes;
2562                 }
2563         }
2564         oqctl->qc_dqblk.dqb_curspace = curspace;
2565         oqctl->qc_dqblk.dqb_curinodes = curinodes;
2566
2567         RETURN(rc);
2568 }
2569
2570 int lmv_quotacheck(struct obd_device *unused, struct obd_export *exp,
2571                    struct obd_quotactl *oqctl)
2572 {
2573         struct obd_device   *obd = class_exp2obd(exp);
2574         struct lmv_obd      *lmv = &obd->u.lmv;
2575         struct lmv_tgt_desc *tgt;
2576         int                  i, rc = 0;
2577         ENTRY;
2578
2579         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2580                 int err;
2581                 tgt = lmv->tgts[i];
2582                 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active) {
2583                         CERROR("lmv idx %d inactive\n", i);
2584                         RETURN(-EIO);
2585                 }
2586
2587                 err = obd_quotacheck(tgt->ltd_exp, oqctl);
2588                 if (err && !rc)
2589                         rc = err;
2590         }
2591
2592         RETURN(rc);
2593 }
2594
2595 struct obd_ops lmv_obd_ops = {
2596         .o_owner                = THIS_MODULE,
2597         .o_setup                = lmv_setup,
2598         .o_cleanup              = lmv_cleanup,
2599         .o_precleanup           = lmv_precleanup,
2600         .o_process_config       = lmv_process_config,
2601         .o_connect              = lmv_connect,
2602         .o_disconnect           = lmv_disconnect,
2603         .o_statfs               = lmv_statfs,
2604         .o_get_info             = lmv_get_info,
2605         .o_set_info_async       = lmv_set_info_async,
2606         .o_packmd               = lmv_packmd,
2607         .o_unpackmd             = lmv_unpackmd,
2608         .o_notify               = lmv_notify,
2609         .o_get_uuid             = lmv_get_uuid,
2610         .o_iocontrol            = lmv_iocontrol,
2611         .o_quotacheck           = lmv_quotacheck,
2612         .o_quotactl             = lmv_quotactl
2613 };
2614
2615 struct md_ops lmv_md_ops = {
2616         .m_getstatus            = lmv_getstatus,
2617         .m_change_cbdata        = lmv_change_cbdata,
2618         .m_find_cbdata          = lmv_find_cbdata,
2619         .m_close                = lmv_close,
2620         .m_create               = lmv_create,
2621         .m_done_writing         = lmv_done_writing,
2622         .m_enqueue              = lmv_enqueue,
2623         .m_getattr              = lmv_getattr,
2624         .m_getxattr             = lmv_getxattr,
2625         .m_getattr_name         = lmv_getattr_name,
2626         .m_intent_lock          = lmv_intent_lock,
2627         .m_link                 = lmv_link,
2628         .m_rename               = lmv_rename,
2629         .m_setattr              = lmv_setattr,
2630         .m_setxattr             = lmv_setxattr,
2631         .m_sync                 = lmv_sync,
2632         .m_readpage             = lmv_readpage,
2633         .m_unlink               = lmv_unlink,
2634         .m_init_ea_size         = lmv_init_ea_size,
2635         .m_cancel_unused        = lmv_cancel_unused,
2636         .m_set_lock_data        = lmv_set_lock_data,
2637         .m_lock_match           = lmv_lock_match,
2638         .m_get_lustre_md        = lmv_get_lustre_md,
2639         .m_free_lustre_md       = lmv_free_lustre_md,
2640         .m_set_open_replay_data = lmv_set_open_replay_data,
2641         .m_clear_open_replay_data = lmv_clear_open_replay_data,
2642         .m_renew_capa           = lmv_renew_capa,
2643         .m_unpack_capa          = lmv_unpack_capa,
2644         .m_get_remote_perm      = lmv_get_remote_perm,
2645         .m_intent_getattr_async = lmv_intent_getattr_async,
2646         .m_revalidate_lock      = lmv_revalidate_lock
2647 };
2648
2649 int __init lmv_init(void)
2650 {
2651         struct lprocfs_static_vars lvars;
2652         int                        rc;
2653
2654         lprocfs_lmv_init_vars(&lvars);
2655
2656         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
2657                                  lvars.module_vars, LUSTRE_LMV_NAME, NULL);
2658         return rc;
2659 }
2660
2661 #ifdef __KERNEL__
2662 static void lmv_exit(void)
2663 {
2664         class_unregister_type(LUSTRE_LMV_NAME);
2665 }
2666
2667 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2668 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
2669 MODULE_LICENSE("GPL");
2670
2671 module_init(lmv_init);
2672 module_exit(lmv_exit);
2673 #endif