lustre/lmv/lmv_obd.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #ifndef EXPORT_SYMTAB
  23 # define EXPORT_SYMTAB
  24 #endif
  25 #define DEBUG_SUBSYSTEM S_LMV
  26 #ifdef __KERNEL__
  27 #include <linux/slab.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/pagemap.h>
  32 #include <asm/div64.h>
  33 #include <linux/seq_file.h>
  34 #else
  35 #include <liblustre.h>
  36 #endif
  37 #include <linux/ext2_fs.h>
  38
  39 #include <linux/obd_support.h>
  40 #include <linux/lustre_lib.h>
  41 #include <linux/lustre_net.h>
  42 #include <linux/lustre_idl.h>
  43 #include <linux/lustre_dlm.h>
  44 #include <linux/lustre_mds.h>
  45 #include <linux/obd_class.h>
  46 #include <linux/obd_ost.h>
  47 #include <linux/lprocfs_status.h>
  48 #include <linux/lustre_fsfilt.h>
  49 #include <linux/obd_lmv.h>
  50 #include "lmv_internal.h"
  51
  52 /* Error codes:
  53  *
  54  *  -EINVAL  : UUID can't be found in the LMV's target list
  55  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
  56  *  -EBADF   : The UUID is found, but the OBD of the wrong type (!)
  57  */
  58 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
  59                               int activate)
  60 {
  61         struct obd_device *obd;
  62         struct lmv_tgt_desc *tgt;
  63         int i, rc = 0;
  64         ENTRY;
  65
  66         CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
  67                lmv, uuid->uuid, activate);
  68
  69         spin_lock(&lmv->lmv_lock);
  70         for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
  71                 if (tgt->ltd_exp == NULL)
  72                         continue;
  73
  74                 CDEBUG(D_INFO, "lmv idx %d is %s conn "LPX64"\n",
  75                        i, tgt->uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
  76                 if (strncmp(uuid->uuid, tgt->uuid.uuid, sizeof uuid->uuid) == 0)
  77                         break;
  78         }
  79
  80         if (i == lmv->desc.ld_tgt_count)
  81                 GOTO(out, rc = -EINVAL);
  82
  83         obd = class_exp2obd(tgt->ltd_exp);
  84         if (obd == NULL)
  85                 GOTO(out, rc = -ENOTCONN);
  86
  87         CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
  88                obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
  89                obd->obd_type->typ_name, i);
  90         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
  91
  92         if (tgt->active == activate) {
  93                 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
  94                        activate ? "" : "in");
  95                 GOTO(out, rc);
  96         }
  97
  98         CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd, activate ? "" : "in");
  99
 100         tgt->active = activate;
 101         if (activate)
 102                 lmv->desc.ld_active_tgt_count++;
 103         else
 104                 lmv->desc.ld_active_tgt_count--;
 105
 106         EXIT;
 107  out:
 108         spin_unlock(&lmv->lmv_lock);
 109         return rc;
 110 }
 111
 112 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
 113                       int active, void *data)
 114 {
 115         int rc;
 116         struct obd_uuid *uuid;
 117
 118         if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 119                 CERROR("unexpected notification of %s %s!\n",
 120                        watched->obd_type->typ_name,
 121                        watched->obd_name);
 122                 return -EINVAL;
 123         }
 124         uuid = &watched->u.cli.cl_import->imp_target_uuid;
 125
 126         /* Set MDC as active before notifying the observer, so the
 127          * observer can use the MDC normally.
 128          */
 129         rc = lmv_set_mdc_active(&obd->u.lmv, uuid, active);
 130         if (rc) {
 131                 CERROR("%sactivation of %s failed: %d\n",
 132                        active ? "" : "de", uuid->uuid, rc);
 133                 RETURN(rc);
 134         }
 135
 136         if (obd->obd_observer)
 137                 /* Pass the notification up the chain. */
 138                 rc = obd_notify(obd->obd_observer, watched, active, data);
 139
 140         RETURN(rc);
 141 }
 142
 143 int lmv_attach(struct obd_device *dev, obd_count len, void *data)
 144 {
 145         struct lprocfs_static_vars lvars;
 146         int rc;
 147         ENTRY;
 148
 149         lprocfs_init_vars(lmv, &lvars);
 150         rc = lprocfs_obd_attach(dev, lvars.obd_vars);
 151         if (rc == 0) {
 152 #ifdef __KERNEL__
 153                 struct proc_dir_entry *entry;
 154
 155                 entry = create_proc_entry("target_obd_status", 0444,
 156                                            dev->obd_proc_entry);
 157                 if (entry == NULL)
 158                         RETURN(-ENOMEM);
 159                 entry->proc_fops = &lmv_proc_target_fops;
 160                 entry->data = dev;
 161 #endif
 162        }
 163         RETURN (rc);
 164 }
 165
 166 int lmv_detach(struct obd_device *dev)
 167 {
 168         return lprocfs_obd_detach(dev);
 169 }
 170
 171 /* This is fake connect function. Its purpose is to initialize lmv and
 172  * say caller that everything is okay. Real connection will be performed
 173  * later. */
 174 static int lmv_connect(struct lustre_handle *conn, struct obd_device *obd,
 175                        struct obd_uuid *cluuid, unsigned long connect_flags)
 176 {
 177         struct lmv_obd *lmv = &obd->u.lmv;
 178         struct obd_export *exp;
 179         struct proc_dir_entry *lmv_proc_dir;
 180         int rc;
 181         ENTRY;
 182
 183         rc = class_connect(conn, obd, cluuid);
 184         if (rc) {
 185                 CERROR("class_connection() returned %d\n", rc);
 186                 RETURN(rc);
 187         }
 188
 189         exp = class_conn2export(conn);
 190         /* We don't want to actually do the underlying connections more than
 191          * once, so keep track. */
 192         lmv->refcount++;
 193         if (lmv->refcount > 1) {
 194                 class_export_put(exp);
 195                 RETURN(0);
 196         }
 197
 198         lmv->cluuid = *cluuid;
 199         lmv->connect_flags = connect_flags;
 200         lmv->connected = 0;
 201         lmv->exp = exp;
 202         sema_init(&lmv->init_sem, 1);
 203
 204         lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
 205                                         NULL, NULL);
 206         if (IS_ERR(lmv_proc_dir)) {
 207                 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
 208                        obd->obd_type->typ_name, obd->obd_name);
 209                 lmv_proc_dir = NULL;
 210         }
 211
 212
 213         RETURN(0);
 214 }
 215
 216 void lmv_set_timeouts(struct obd_device *obd)
 217 {
 218         struct lmv_tgt_desc *tgts;
 219         struct lmv_obd *lmv;
 220         int i;
 221
 222         lmv = &obd->u.lmv;
 223         if (lmv->server_timeout == 0)
 224                 return;
 225
 226         if (lmv->connected == 0)
 227                 return;
 228
 229         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 230                 if (tgts->ltd_exp == NULL)
 231                         continue;
 232                 obd_set_info(tgts->ltd_exp, strlen("inter_mds"),
 233                              "inter_mds", 0, NULL);
 234         }
 235 }
 236
 237 /* Performs a check if passed obd is connected. If no - connect it. */
 238 #define MAX_STRING_SIZE 128
 239 int lmv_check_connect(struct obd_device *obd)
 240 {
 241         struct lmv_obd *lmv = &obd->u.lmv;
 242         struct obd_uuid *cluuid;
 243         struct lmv_tgt_desc *tgts;
 244         struct proc_dir_entry *lmv_proc_dir;
 245         struct obd_export *exp;
 246         int rc, rc2, i;
 247
 248         if (lmv->connected)
 249                 return 0;
 250
 251         down(&lmv->init_sem);
 252         if (lmv->connected) {
 253                 up(&lmv->init_sem);
 254                 return 0;
 255         }
 256
 257         cluuid = &lmv->cluuid;
 258         exp = lmv->exp;
 259
 260         CDEBUG(D_OTHER, "time to connect %s to %s\n",
 261                cluuid->uuid, obd->obd_name);
 262
 263         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 264                 struct obd_device *tgt_obd;
 265                 struct obd_uuid lmv_osc_uuid = { "LMV_OSC_UUID" };
 266                 struct lustre_handle conn = {0, };
 267
 268                 LASSERT(tgts != NULL);
 269
 270                 tgt_obd = class_find_client_obd(&tgts->uuid, LUSTRE_MDC_NAME,
 271                                                 &obd->obd_uuid);
 272                 if (!tgt_obd) {
 273                         CERROR("Target %s not attached\n", tgts->uuid.uuid);
 274                         GOTO(out_disc, rc = -EINVAL);
 275                 }
 276
 277                 /* for MDS: don't connect to yourself */
 278                 if (obd_uuid_equals(&tgts->uuid, cluuid)) {
 279                         CDEBUG(D_OTHER, "don't connect back to %s\n",
 280                                cluuid->uuid);
 281                         tgts->ltd_exp = NULL;
 282                         continue;
 283                 }
 284
 285                 CDEBUG(D_OTHER, "connect to %s(%s) - %s, %s FOR %s\n",
 286                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 287                         tgts->uuid.uuid, obd->obd_uuid.uuid,
 288                         cluuid->uuid);
 289
 290                 if (!tgt_obd->obd_set_up) {
 291                         CERROR("Target %s not set up\n", tgts->uuid.uuid);
 292                         GOTO(out_disc, rc = -EINVAL);
 293                 }
 294
 295                 rc = obd_connect(&conn, tgt_obd, &lmv_osc_uuid,
 296                                  lmv->connect_flags);
 297                 if (rc) {
 298                         CERROR("Target %s connect error %d\n",
 299                                 tgts->uuid.uuid, rc);
 300                         GOTO(out_disc, rc);
 301                 }
 302                 tgts->ltd_exp = class_conn2export(&conn);
 303
 304                 obd_init_ea_size(tgts->ltd_exp, lmv->max_easize,
 305                                  lmv->max_cookiesize);
 306
 307                 rc = obd_register_observer(tgt_obd, obd);
 308                 if (rc) {
 309                         CERROR("Target %s register_observer error %d\n",
 310                                tgts->uuid.uuid, rc);
 311                         obd_disconnect(tgts->ltd_exp, 0);
 312                         GOTO(out_disc, rc);
 313                 }
 314
 315                 lmv->desc.ld_active_tgt_count++;
 316                 tgts->active = 1;
 317
 318                 CDEBUG(D_OTHER, "connected to %s(%s) successfully (%d)\n",
 319                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 320                         atomic_read(&obd->obd_refcount));
 321
 322                 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 323                 if (lmv_proc_dir) {
 324                         struct obd_device *mdc_obd = class_conn2obd(&conn);
 325                         struct proc_dir_entry *mdc_symlink;
 326                         char name[MAX_STRING_SIZE + 1];
 327
 328                         LASSERT(mdc_obd != NULL);
 329                         LASSERT(mdc_obd->obd_type != NULL);
 330                         LASSERT(mdc_obd->obd_type->typ_name != NULL);
 331                         name[MAX_STRING_SIZE] = '\0';
 332                         snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
 333                                  mdc_obd->obd_type->typ_name,
 334                                  mdc_obd->obd_name);
 335                         mdc_symlink = proc_symlink(mdc_obd->obd_name,
 336                                                    lmv_proc_dir, name);
 337                         if (mdc_symlink == NULL) {
 338                                 CERROR("could not register LMV target "
 339                                        "/proc/fs/lustre/%s/%s/target_obds/%s.",
 340                                        obd->obd_type->typ_name, obd->obd_name,
 341                                        mdc_obd->obd_name);
 342                                 lprocfs_remove(lmv_proc_dir);
 343                                 lmv_proc_dir = NULL;
 344                         }
 345                 }
 346         }
 347
 348         lmv_set_timeouts(obd);
 349         class_export_put(exp);
 350         lmv->connected = 1;
 351         up(&lmv->init_sem);
 352         return 0;
 353
 354  out_disc:
 355         while (i-- > 0) {
 356                 struct obd_uuid uuid;
 357                 --tgts;
 358                 --lmv->desc.ld_active_tgt_count;
 359                 tgts->active = 0;
 360                 /* save for CERROR below; (we know it's terminated) */
 361                 uuid = tgts->uuid;
 362                 rc2 = obd_disconnect(tgts->ltd_exp, 0);
 363                 if (rc2)
 364                         CERROR("error: LMV target %s disconnect on MDT idx %d: "
 365                                "error %d\n", uuid.uuid, i, rc2);
 366         }
 367         class_disconnect(exp, 0);
 368         up(&lmv->init_sem);
 369         RETURN (rc);
 370 }
 371
 372 static int lmv_disconnect(struct obd_export *exp, int flags)
 373 {
 374         struct obd_device *obd = class_exp2obd(exp);
 375         struct lmv_obd *lmv = &obd->u.lmv;
 376         struct proc_dir_entry *lmv_proc_dir;
 377         int rc, i;
 378         ENTRY;
 379
 380         if (!lmv->tgts)
 381                 goto out_local;
 382
 383         /* Only disconnect the underlying layers on the final disconnect. */
 384         lmv->refcount--;
 385         if (lmv->refcount != 0)
 386                 goto out_local;
 387
 388         lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 389
 390         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 391                 struct obd_device *mdc_obd;
 392
 393                 if (lmv->tgts[i].ltd_exp == NULL)
 394                         continue;
 395
 396                 mdc_obd = class_exp2obd(lmv->tgts[i].ltd_exp);
 397                 if (lmv_proc_dir) {
 398                         struct proc_dir_entry *mdc_symlink;
 399
 400                         mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
 401                         if (mdc_symlink) {
 402                                 lprocfs_remove(mdc_symlink);
 403                         } else {
 404                                 CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
 405                                        obd->obd_type->typ_name, obd->obd_name,
 406                                        mdc_obd->obd_name);
 407                         }
 408                 }
 409
 410                 if (obd->obd_no_recov) {
 411                         /* Pass it on to our clients.
 412                          * XXX This should be an argument to disconnect,
 413                          * XXX not a back-door flag on the OBD.  Ah well.
 414                          */
 415                         struct obd_device *mdc_obd;
 416                         mdc_obd = class_exp2obd(lmv->tgts[i].ltd_exp);
 417                         if (mdc_obd)
 418                                 mdc_obd->obd_no_recov = 1;
 419                 }
 420
 421                 CDEBUG(D_OTHER, "disconnected from %s(%s) successfully\n",
 422                         lmv->tgts[i].ltd_exp->exp_obd->obd_name,
 423                         lmv->tgts[i].ltd_exp->exp_obd->obd_uuid.uuid);
 424
 425                 obd_register_observer(lmv->tgts[i].ltd_exp->exp_obd, NULL);
 426
 427                 rc = obd_disconnect(lmv->tgts[i].ltd_exp, flags);
 428                 if (rc) {
 429                         if (lmv->tgts[i].active) {
 430                                 CERROR("Target %s disconnect error %d\n",
 431                                        lmv->tgts[i].uuid.uuid, rc);
 432                         }
 433                         rc = 0;
 434                 }
 435                 if (lmv->tgts[i].active) {
 436                         lmv->desc.ld_active_tgt_count--;
 437                         lmv->tgts[i].active = 0;
 438                 }
 439                 lmv->tgts[i].ltd_exp = NULL;
 440         }
 441
 442         if (lmv_proc_dir) {
 443                 lprocfs_remove(lmv_proc_dir);
 444         } else {
 445                 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
 446                        obd->obd_type->typ_name, obd->obd_name);
 447         }
 448
 449
 450 out_local:
 451         /* this is the case when no real connection is established by
 452          * lmv_check_connect(). */
 453         if (!lmv->connected)
 454                 class_export_put(exp);
 455         rc = class_disconnect(exp, 0);
 456         if (lmv->refcount == 0)
 457                 lmv->connected = 0;
 458         RETURN(rc);
 459 }
 460
 461 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 462                          int len, void *karg, void *uarg)
 463 {
 464         struct obd_device *obddev = class_exp2obd(exp);
 465         struct lmv_obd *lmv = &obddev->u.lmv;
 466         int i, rc = 0, set = 0;
 467
 468         ENTRY;
 469
 470         if (lmv->desc.ld_tgt_count == 0)
 471                 RETURN(-ENOTTY);
 472
 473         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 474                 int err;
 475
 476                 if (lmv->tgts[i].ltd_exp == NULL) {
 477                         CWARN("%s: NULL export for %d\n", obddev->obd_name, i);
 478                         continue;
 479                 }
 480
 481                 err = obd_iocontrol(cmd, lmv->tgts[i].ltd_exp, len, karg, uarg);
 482                 if (err) {
 483                         if (lmv->tgts[i].active) {
 484                                 CERROR("error: iocontrol MDC %s on MDT"
 485                                        "idx %d: err = %d\n",
 486                                        lmv->tgts[i].uuid.uuid, i, err);
 487                                 if (!rc)
 488                                         rc = err;
 489                         }
 490                 } else
 491                         set = 1;
 492         }
 493         if (!set && !rc)
 494                 rc = -EIO;
 495
 496         RETURN(rc);
 497 }
 498
 499 static int lmv_setup(struct obd_device *obd, obd_count len, void *buf)
 500 {
 501         int i, rc = 0;
 502         struct lmv_desc *desc;
 503         struct obd_uuid *uuids;
 504         struct lmv_tgt_desc *tgts;
 505         struct obd_device *tgt_obd;
 506         struct lustre_cfg *lcfg = buf;
 507         struct lmv_obd *lmv = &obd->u.lmv;
 508         ENTRY;
 509
 510         if (lcfg->lcfg_inllen1 < 1) {
 511                 CERROR("LMV setup requires a descriptor\n");
 512                 RETURN(-EINVAL);
 513         }
 514
 515         if (lcfg->lcfg_inllen2 < 1) {
 516                 CERROR("LMV setup requires an OST UUID list\n");
 517                 RETURN(-EINVAL);
 518         }
 519
 520         desc = (struct lmv_desc *)lcfg->lcfg_inlbuf1;
 521         if (sizeof(*desc) > lcfg->lcfg_inllen1) {
 522                 CERROR("descriptor size wrong: %d > %d\n",
 523                        (int)sizeof(*desc), lcfg->lcfg_inllen1);
 524                 RETURN(-EINVAL);
 525         }
 526
 527         uuids = (struct obd_uuid *)lcfg->lcfg_inlbuf2;
 528         if (sizeof(*uuids) * desc->ld_tgt_count != lcfg->lcfg_inllen2) {
 529                 CERROR("UUID array size wrong: %u * %u != %u\n",
 530                        sizeof(*uuids), desc->ld_tgt_count, lcfg->lcfg_inllen2);
 531                 RETURN(-EINVAL);
 532         }
 533
 534         lmv->bufsize = sizeof(struct lmv_tgt_desc) * desc->ld_tgt_count;
 535         OBD_ALLOC(lmv->tgts, lmv->bufsize);
 536         if (lmv->tgts == NULL) {
 537                 CERROR("Out of memory\n");
 538                 RETURN(-ENOMEM);
 539         }
 540
 541         lmv->desc = *desc;
 542         spin_lock_init(&lmv->lmv_lock);
 543
 544         for (i = 0, tgts = lmv->tgts; i < desc->ld_tgt_count; i++, tgts++)
 545                 tgts->uuid = uuids[i];
 546
 547         lmv->max_cookiesize = 0;
 548
 549         lmv->max_easize = sizeof(struct ll_fid) *
 550                 desc->ld_tgt_count + sizeof(struct mea);
 551
 552         rc = lmv_setup_mgr(obd);
 553         if (rc) {
 554                 CERROR("Can't setup LMV object manager, "
 555                        "error %d.\n", rc);
 556                 OBD_FREE(lmv->tgts, lmv->bufsize);
 557         }
 558
 559         tgt_obd = class_find_client_obd(&lmv->tgts->uuid, LUSTRE_MDC_NAME,
 560                                         &obd->obd_uuid);
 561         if (!tgt_obd) {
 562                 CERROR("Target %s not attached\n", lmv->tgts->uuid.uuid);
 563                 RETURN(-EINVAL);
 564         }
 565
 566         rc = obd_llog_init(obd, &obd->obd_llogs, tgt_obd, 0, NULL);
 567         if (rc) {
 568                 CERROR("failed to setup llogging subsystems\n");
 569         }
 570
 571         RETURN(rc);
 572 }
 573
 574 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 575                       unsigned long max_age)
 576 {
 577         struct lmv_obd *lmv = &obd->u.lmv;
 578         struct obd_statfs temp;
 579         int rc = 0, i;
 580         ENTRY;
 581
 582         rc = lmv_check_connect(obd);
 583         if (rc)
 584                 RETURN(rc);
 585
 586         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 587                 if (lmv->tgts[i].ltd_exp == NULL) {
 588                         CWARN("%s: NULL export for %d\n", obd->obd_name, i);
 589                         continue;
 590                 }
 591
 592                 rc = obd_statfs(lmv->tgts[i].ltd_exp->exp_obd, &temp, max_age);
 593                 if (rc) {
 594                         CERROR("can't stat MDS #%d (%s)\n", i,
 595                                lmv->tgts[i].ltd_exp->exp_obd->obd_name);
 596                         RETURN(rc);
 597                 }
 598                 if (i == 0) {
 599                         memcpy(osfs, &temp, sizeof(temp));
 600                 } else {
 601                         osfs->os_bavail += temp.os_bavail;
 602                         osfs->os_blocks += temp.os_blocks;
 603                         osfs->os_ffree += temp.os_ffree;
 604                         osfs->os_files += temp.os_files;
 605                 }
 606         }
 607         RETURN(rc);
 608 }
 609
 610 static int lmv_cleanup(struct obd_device *obd, int flags)
 611 {
 612         struct lmv_obd *lmv = &obd->u.lmv;
 613         ENTRY;
 614         lmv_cleanup_mgr(obd);
 615         OBD_FREE(lmv->tgts, lmv->bufsize);
 616         RETURN(0);
 617 }
 618
 619 static int lmv_getstatus(struct obd_export *exp, struct ll_fid *fid)
 620 {
 621         struct obd_device *obd = exp->exp_obd;
 622         struct lmv_obd *lmv = &obd->u.lmv;
 623         int rc;
 624         ENTRY;
 625         rc = lmv_check_connect(obd);
 626         if (rc)
 627                 RETURN(rc);
 628         rc = md_getstatus(lmv->tgts[0].ltd_exp, fid);
 629         fid->mds = 0;
 630         RETURN(rc);
 631 }
 632
 633 static int lmv_getattr(struct obd_export *exp, struct ll_fid *fid,
 634                        unsigned long valid, unsigned int ea_size,
 635                        struct ptlrpc_request **request)
 636 {
 637         struct obd_device *obd = exp->exp_obd;
 638         struct lmv_obd *lmv = &obd->u.lmv;
 639         int rc, i = fid->mds;
 640         struct lmv_obj *obj;
 641         ENTRY;
 642
 643         rc = lmv_check_connect(obd);
 644         if (rc)
 645                 RETURN(rc);
 646
 647         LASSERT(i < lmv->desc.ld_tgt_count);
 648
 649         rc = md_getattr(lmv->tgts[i].ltd_exp, fid, valid,
 650                         ea_size, request);
 651         if (rc)
 652                 RETURN(rc);
 653
 654         obj = lmv_grab_obj(obd, fid);
 655
 656         CDEBUG(D_OTHER, "GETATTR for %lu/%lu/%lu %s\n",
 657                (unsigned long)fid->mds, (unsigned long)fid->id,
 658                (unsigned long)fid->generation, obj ? "(splitted)" : "");
 659
 660         /* if object is splitted, then we loop over all the slaves and gather
 661          * size attribute. In ideal world we would have to gather also mds field
 662          * from all slaves, as object is spread over the cluster and this is
 663          * definitely interesting information and it is not good to loss it,
 664          * but...*/
 665         if (obj) {
 666                 struct mds_body *body;
 667
 668                 if (*request == NULL) {
 669                         lmv_put_obj(obj);
 670                         RETURN(rc);
 671                 }
 672
 673                 body = lustre_msg_buf((*request)->rq_repmsg, 0,
 674                                       sizeof(*body));
 675                 LASSERT(body != NULL);
 676
 677                 lmv_lock_obj(obj);
 678
 679                 for (i = 0; i < obj->objcount; i++) {
 680
 681                         if (lmv->tgts[i].ltd_exp == NULL) {
 682                                 CWARN("%s: NULL export for %d\n",
 683                                       obd->obd_name, i);
 684                                 continue;
 685                         }
 686
 687                         /* skip master obj. */
 688                         if (fid_equal(&obj->fid, &obj->objs[i].fid))
 689                                 continue;
 690
 691                         body->size += obj->objs[i].size;
 692                 }
 693
 694                 lmv_unlock_obj(obj);
 695                 lmv_put_obj(obj);
 696         }
 697
 698         RETURN(rc);
 699 }
 700
 701 static int lmv_change_cbdata(struct obd_export *exp, struct ll_fid *fid,
 702                              ldlm_iterator_t it, void *data)
 703 {
 704         struct obd_device *obd = exp->exp_obd;
 705         struct lmv_obd *lmv = &obd->u.lmv;
 706         int rc = 0;
 707         ENTRY;
 708
 709         rc = lmv_check_connect(obd);
 710         if (rc)
 711                 RETURN(rc);
 712
 713         CDEBUG(D_OTHER, "CBDATA for %lu/%lu/%lu\n", (unsigned long)fid->mds,
 714                (unsigned long)fid->id, (unsigned long)fid->generation);
 715
 716         LASSERT(fid->mds < lmv->desc.ld_tgt_count);
 717
 718         rc = md_change_cbdata(lmv->tgts[fid->mds].ltd_exp,
 719                               fid, it, data);
 720
 721         RETURN(rc);
 722 }
 723
 724 static int lmv_change_cbdata_name(struct obd_export *exp, struct ll_fid *pfid,
 725                                   char *name, int len, struct ll_fid *cfid,
 726                                   ldlm_iterator_t it, void *data)
 727 {
 728         struct obd_device *obd = exp->exp_obd;
 729         struct lmv_obd *lmv = &obd->u.lmv;
 730         struct lmv_obj *obj;
 731         int rc = 0, mds;
 732         ENTRY;
 733
 734         rc = lmv_check_connect(obd);
 735         if (rc)
 736                 RETURN(rc);
 737
 738         LASSERT(pfid->mds < lmv->desc.ld_tgt_count);
 739         LASSERT(cfid->mds < lmv->desc.ld_tgt_count);
 740
 741         CDEBUG(D_OTHER, "CBDATA for %lu/%lu/%lu:%*s -> %lu/%lu/%lu\n",
 742                (unsigned long)pfid->mds, (unsigned long)pfid->id,
 743                (unsigned long)pfid->generation, len, name,
 744                (unsigned long)cfid->mds, (unsigned long)cfid->id,
 745                (unsigned long)cfid->generation);
 746
 747         /* this is default mds for directory name belongs to. */
 748         mds = pfid->mds;
 749         obj = lmv_grab_obj(obd, pfid);
 750         if (obj) {
 751                 /* directory is splitted. look for right mds for this name. */
 752                 mds = raw_name2idx(obj->hashtype, obj->objcount, name, len);
 753                 mds = obj->objs[mds].fid.mds;
 754                 lmv_put_obj(obj);
 755         }
 756         rc = md_change_cbdata(lmv->tgts[mds].ltd_exp, cfid, it, data);
 757         RETURN(rc);
 758 }
 759
 760 static int lmv_valid_attrs(struct obd_export *exp, struct ll_fid *fid)
 761 {
 762         struct obd_device *obd = exp->exp_obd;
 763         struct lmv_obd *lmv = &obd->u.lmv;
 764         int rc = 0;
 765         ENTRY;
 766         rc = lmv_check_connect(obd);
 767         if (rc)
 768                 RETURN(rc);
 769         CDEBUG(D_OTHER, "validate %lu/%lu/%lu\n", (unsigned long) fid->mds,
 770                (unsigned long) fid->id, (unsigned long) fid->generation);
 771         LASSERT(fid->mds < lmv->desc.ld_tgt_count);
 772         rc = md_valid_attrs(lmv->tgts[fid->mds].ltd_exp, fid);
 773         RETURN(rc);
 774 }
 775
 776 int lmv_close(struct obd_export *exp, struct obdo *obdo,
 777                   struct obd_client_handle *och,
 778                   struct ptlrpc_request **request)
 779 {
 780         struct obd_device *obd = exp->exp_obd;
 781         struct lmv_obd *lmv = &obd->u.lmv;
 782         int rc, i = obdo->o_mds;
 783         ENTRY;
 784         rc = lmv_check_connect(obd);
 785         if (rc)
 786                 RETURN(rc);
 787         LASSERT(i < lmv->desc.ld_tgt_count);
 788         CDEBUG(D_OTHER, "CLOSE %lu/%lu/%lu\n", (unsigned long) obdo->o_mds,
 789                (unsigned long) obdo->o_id, (unsigned long) obdo->o_generation);
 790         rc = md_close(lmv->tgts[i].ltd_exp, obdo, och, request);
 791         RETURN(rc);
 792 }
 793
 794 int lmv_get_mea_and_update_object(struct obd_export *exp, struct ll_fid *fid)
 795 {
 796         struct obd_device *obd = exp->exp_obd;
 797         struct lmv_obd *lmv = &obd->u.lmv;
 798         struct ptlrpc_request *req = NULL;
 799         struct lmv_obj *obj;
 800         struct lustre_md md;
 801         unsigned long valid;
 802         int mealen, rc;
 803
 804         md.mea = NULL;
 805         mealen = MEA_SIZE_LMV(lmv);
 806
 807         valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 808
 809         /* time to update mea of parent fid */
 810         rc = md_getattr(lmv->tgts[fid->mds].ltd_exp, fid,
 811                         valid, mealen, &req);
 812         if (rc) {
 813                 CERROR("md_getattr() failed, error %d\n", rc);
 814                 GOTO(cleanup, rc);
 815         }
 816
 817         rc = mdc_req2lustre_md(exp, req, 0, NULL, &md);
 818         if (rc) {
 819                 CERROR("mdc_req2lustre_md() failed, error %d\n", rc);
 820                 GOTO(cleanup, rc);
 821         }
 822
 823         if (md.mea == NULL)
 824                 GOTO(cleanup, rc = -ENODATA);
 825
 826         obj = lmv_create_obj(exp, fid, md.mea);
 827         if (IS_ERR(obj))
 828                 rc = PTR_ERR(obj);
 829
 830         lmv_put_obj(obj);
 831         obd_free_memmd(exp, (struct lov_stripe_md **)&md.mea);
 832
 833 cleanup:
 834         if (req)
 835                 ptlrpc_req_finished(req);
 836         RETURN(rc);
 837 }
 838
 839 int lmv_create(struct obd_export *exp, struct mdc_op_data *op_data,
 840                const void *data, int datalen, int mode, __u32 uid,
 841                __u32 gid, __u64 rdev, struct ptlrpc_request **request)
 842 {
 843         struct obd_device *obd = exp->exp_obd;
 844         struct lmv_obd *lmv = &obd->u.lmv;
 845         struct mds_body *body;
 846         struct lmv_obj *obj;
 847         int rc, mds, loop = 0;
 848         ENTRY;
 849
 850         rc = lmv_check_connect(obd);
 851         if (rc)
 852                 RETURN(rc);
 853
 854         if (!lmv->desc.ld_active_tgt_count)
 855                 RETURN(-EIO);
 856 repeat:
 857         LASSERT(++loop <= 2);
 858         obj = lmv_grab_obj(obd, &op_data->fid1);
 859         if (obj) {
 860                 mds = raw_name2idx(obj->hashtype, obj->objcount, op_data->name,
 861                                    op_data->namelen);
 862                 op_data->fid1 = obj->objs[mds].fid;
 863                 lmv_put_obj(obj);
 864         }
 865
 866         CDEBUG(D_OTHER, "CREATE '%*s' on %lu/%lu/%lu\n", op_data->namelen,
 867                op_data->name, (unsigned long)op_data->fid1.mds,
 868                (unsigned long)op_data->fid1.id,
 869                (unsigned long)op_data->fid1.generation);
 870
 871         rc = md_create(lmv->tgts[op_data->fid1.mds].ltd_exp, op_data, data,
 872                        datalen, mode, uid, gid, rdev, request);
 873         if (rc == 0) {
 874                 if (*request == NULL)
 875                         RETURN(rc);
 876
 877                 body = lustre_msg_buf((*request)->rq_repmsg, 0,
 878                                       sizeof(*body));
 879                 LASSERT(body != NULL);
 880
 881                 CDEBUG(D_OTHER, "created. id = %lu, generation = %lu, "
 882                        "mds = %d\n", (unsigned long)body->fid1.id,
 883                        (unsigned long)body->fid1.generation, op_data->fid1.mds);
 884
 885                 LASSERT(body->valid & OBD_MD_MDS ||
 886                         body->mds == op_data->fid1.mds);
 887         } else if (rc == -ERESTART) {
 888                 /* directory got splitted. time to update local object and
 889                  * repeat the request with proper MDS */
 890                 rc = lmv_get_mea_and_update_object(exp, &op_data->fid1);
 891                 if (rc == 0) {
 892                         ptlrpc_req_finished(*request);
 893                         goto repeat;
 894                 }
 895         }
 896         RETURN(rc);
 897 }
 898
 899 int lmv_done_writing(struct obd_export *exp, struct obdo *obdo)
 900 {
 901         struct obd_device *obd = exp->exp_obd;
 902         struct lmv_obd *lmv = &obd->u.lmv;
 903         int rc;
 904         ENTRY;
 905         rc = lmv_check_connect(obd);
 906         if (rc)
 907                 RETURN(rc);
 908
 909         /* FIXME: choose right MDC here */
 910         CWARN("this method isn't implemented yet\n");
 911         rc = md_done_writing(lmv->tgts[0].ltd_exp, obdo);
 912         RETURN(rc);
 913 }
 914
 915 int lmv_enqueue_slaves(struct obd_export *exp, int locktype,
 916                        struct lookup_intent *it, int lockmode,
 917                        struct mdc_op_data *data, struct lustre_handle *lockh,
 918                        void *lmm, int lmmsize, ldlm_completion_callback cb_completion,
 919                        ldlm_blocking_callback cb_blocking, void *cb_data)
 920 {
 921         struct obd_device *obd = exp->exp_obd;
 922         struct lmv_obd *lmv = &obd->u.lmv;
 923         struct mea *mea = data->mea1;
 924         struct mdc_op_data data2;
 925         int i, rc, mds;
 926         ENTRY;
 927
 928         LASSERT(mea != NULL);
 929         for (i = 0; i < mea->mea_count; i++) {
 930                 memset(&data2, 0, sizeof(data2));
 931                 data2.fid1 = mea->mea_fids[i];
 932                 mds = data2.fid1.mds;
 933
 934                 if (lmv->tgts[mds].ltd_exp == NULL)
 935                         continue;
 936
 937                 rc = md_enqueue(lmv->tgts[mds].ltd_exp, locktype, it, lockmode,
 938                                 &data2, lockh + i, lmm, lmmsize, cb_completion,
 939                                 cb_blocking, cb_data);
 940
 941                 CDEBUG(D_OTHER, "take lock on slave %lu/%lu/%lu -> %d/%d\n",
 942                        (unsigned long)mea->mea_fids[i].mds,
 943                        (unsigned long)mea->mea_fids[i].id,
 944                        (unsigned long)mea->mea_fids[i].generation,
 945                        rc, it->d.lustre.it_status);
 946                 if (rc)
 947                         GOTO(cleanup, rc);
 948                 if (it->d.lustre.it_data) {
 949                         struct ptlrpc_request *req;
 950                         req = (struct ptlrpc_request *) it->d.lustre.it_data;
 951                         ptlrpc_req_finished(req);
 952                 }
 953
 954                 if (it->d.lustre.it_status)
 955                         GOTO(cleanup, rc = it->d.lustre.it_status);
 956         }
 957         RETURN(0);
 958
 959 cleanup:
 960         /* drop all taken locks */
 961         while (--i >= 0) {
 962                 if (lockh[i].cookie)
 963                         ldlm_lock_decref(lockh + i, lockmode);
 964                 lockh[i].cookie = 0;
 965         }
 966         RETURN(rc);
 967 }
 968
 969 int lmv_enqueue(struct obd_export *exp, int lock_type,
 970                 struct lookup_intent *it, int lock_mode,
 971                 struct mdc_op_data *data, struct lustre_handle *lockh,
 972                 void *lmm, int lmmsize, ldlm_completion_callback cb_completion,
 973                 ldlm_blocking_callback cb_blocking, void *cb_data)
 974 {
 975         struct obd_device *obd = exp->exp_obd;
 976         struct lmv_obd *lmv = &obd->u.lmv;
 977         struct lmv_obj *obj;
 978         int rc, mds;
 979         ENTRY;
 980
 981         rc = lmv_check_connect(obd);
 982         if (rc)
 983                 RETURN(rc);
 984
 985         if (it->it_op == IT_UNLINK) {
 986                 rc = lmv_enqueue_slaves(exp, lock_type, it, lock_mode,
 987                                         data, lockh, lmm, lmmsize,
 988                                         cb_completion, cb_blocking, cb_data);
 989                 RETURN(rc);
 990         }
 991
 992         if (data->namelen) {
 993                 obj = lmv_grab_obj(obd, &data->fid1);
 994                 if (obj) {
 995                         /* directory is splitted. look for right mds for this
 996                          * name */
 997                         mds = raw_name2idx(obj->hashtype, obj->objcount,
 998                                            (char *)data->name, data->namelen);
 999                         data->fid1 = obj->objs[mds].fid;
1000                         lmv_put_obj(obj);
1001                 }
1002         }
1003         CDEBUG(D_OTHER, "ENQUEUE '%s' on %lu/%lu\n", LL_IT2STR(it),
1004                (unsigned long)data->fid1.id, (unsigned long)data->fid1.generation);
1005
1006         rc = md_enqueue(lmv->tgts[data->fid1.mds].ltd_exp, lock_type, it,
1007                         lock_mode, data, lockh, lmm, lmmsize, cb_completion,
1008                         cb_blocking, cb_data);
1009
1010         RETURN(rc);
1011 }
1012
1013 int lmv_getattr_name(struct obd_export *exp, struct ll_fid *fid,
1014                      char *filename, int namelen, unsigned long valid,
1015                      unsigned int ea_size, struct ptlrpc_request **request)
1016 {
1017         struct obd_device *obd = exp->exp_obd;
1018         struct lmv_obd *lmv = &obd->u.lmv;
1019         struct ll_fid rfid = *fid;
1020         int rc, mds = fid->mds, loop = 0;
1021         struct mds_body *body;
1022         struct lmv_obj *obj;
1023         ENTRY;
1024         rc = lmv_check_connect(obd);
1025         if (rc)
1026                 RETURN(rc);
1027 repeat:
1028         LASSERT(++loop <= 2);
1029         obj = lmv_grab_obj(obd, fid);
1030         if (obj) {
1031                 /* directory is splitted. look for right mds for this name */
1032                 mds = raw_name2idx(obj->hashtype, obj->objcount, filename, namelen - 1);
1033                 rfid = obj->objs[mds].fid;
1034                 lmv_put_obj(obj);
1035         }
1036
1037         CDEBUG(D_OTHER, "getattr_name for %*s on %lu/%lu/%lu -> %lu/%lu/%lu\n",
1038                namelen, filename, (unsigned long)fid->mds,
1039                (unsigned long)fid->id, (unsigned long)fid->generation,
1040                (unsigned long)rfid.mds, (unsigned long)rfid.id,
1041                (unsigned long)rfid.generation);
1042
1043         rc = md_getattr_name(lmv->tgts[rfid.mds].ltd_exp, &rfid, filename,
1044                              namelen, valid, ea_size, request);
1045         if (rc == 0) {
1046                 /* this could be cross-node reference. in this case all we have
1047                  * right now is mds/ino/generation triple. we'd like to find
1048                  * other attributes */
1049                 body = lustre_msg_buf((*request)->rq_repmsg, 0, sizeof(*body));
1050                 LASSERT(body != NULL);
1051                 if (body->valid & OBD_MD_MDS) {
1052                         struct ptlrpc_request *req = NULL;
1053                         rfid = body->fid1;
1054                         CDEBUG(D_OTHER, "request attrs for %lu/%lu/%lu\n",
1055                                (unsigned long) rfid.mds,
1056                                (unsigned long) rfid.id,
1057                                (unsigned long) rfid.generation);
1058                         rc = md_getattr_name(lmv->tgts[rfid.mds].ltd_exp, &rfid,
1059                                              NULL, 1, valid, ea_size, &req);
1060                         ptlrpc_req_finished(*request);
1061                         *request = req;
1062                 }
1063         } else if (rc == -ERESTART) {
1064                 /* directory got splitted. time to update local object and
1065                  * repeat the request with proper MDS */
1066                 rc = lmv_get_mea_and_update_object(exp, &rfid);
1067                 if (rc == 0) {
1068                         ptlrpc_req_finished(*request);
1069                         goto repeat;
1070                 }
1071         }
1072         RETURN(rc);
1073 }
1074
1075
1076 /*
1077  * llite passes fid of an target inode in data->fid1 and fid of directory in
1078  * data->fid2
1079  */
1080 int lmv_link(struct obd_export *exp, struct mdc_op_data *data,
1081              struct ptlrpc_request **request)
1082 {
1083         struct obd_device *obd = exp->exp_obd;
1084         struct lmv_obd *lmv = &obd->u.lmv;
1085         struct lmv_obj *obj;
1086         int rc;
1087         ENTRY;
1088
1089         rc = lmv_check_connect(obd);
1090         if (rc)
1091                 RETURN(rc);
1092
1093         if (data->namelen != 0) {
1094                 /* usual link request */
1095                 obj = lmv_grab_obj(obd, &data->fid1);
1096                 if (obj) {
1097                         rc = raw_name2idx(obj->hashtype, obj->objcount, data->name,
1098                                           data->namelen);
1099                         data->fid1 = obj->objs[rc].fid;
1100                         lmv_put_obj(obj);
1101                 }
1102
1103                 CDEBUG(D_OTHER,"link %lu/%lu/%lu:%*s to %lu/%lu/%lu mds %lu\n",
1104                        (unsigned long)data->fid2.mds,
1105                        (unsigned long)data->fid2.id,
1106                        (unsigned long)data->fid2.generation,
1107                        data->namelen, data->name,
1108                        (unsigned long)data->fid1.mds,
1109                        (unsigned long)data->fid1.id,
1110                        (unsigned long)data->fid1.generation,
1111                        (unsigned long)data->fid1.mds);
1112         } else {
1113                 /* request from MDS to acquire i_links for inode by fid1 */
1114                 CDEBUG(D_OTHER, "inc i_nlinks for %lu/%lu/%lu\n",
1115                        (unsigned long)data->fid1.mds,
1116                        (unsigned long)data->fid1.id,
1117                        (unsigned long)data->fid1.generation);
1118         }
1119
1120         rc = md_link(lmv->tgts[data->fid1.mds].ltd_exp, data, request);
1121         RETURN(rc);
1122 }
1123
1124 int lmv_rename(struct obd_export *exp, struct mdc_op_data *data,
1125                const char *old, int oldlen, const char *new, int newlen,
1126                struct ptlrpc_request **request)
1127 {
1128         struct obd_device *obd = exp->exp_obd;
1129         struct lmv_obd *lmv = &obd->u.lmv;
1130         struct lmv_obj *obj;
1131         int rc, mds;
1132         ENTRY;
1133
1134         CDEBUG(D_OTHER, "rename %*s in %lu/%lu/%lu to %*s in %lu/%lu/%lu\n",
1135                oldlen, old, (unsigned long)data->fid1.mds,
1136                (unsigned long)data->fid1.id,
1137                (unsigned long)data->fid1.generation,
1138                newlen, new, (unsigned long) data->fid2.mds,
1139                (unsigned long) data->fid2.id,
1140                (unsigned long) data->fid2.generation);
1141
1142         if (!fid_equal(&data->fid1, &data->fid2))
1143                 CWARN("cross-node rename %lu/%lu/%lu:%*s to %lu/%lu/%lu:%*s\n",
1144                       (unsigned long)data->fid1.mds,
1145                       (unsigned long)data->fid1.id,
1146                       (unsigned long)data->fid1.generation, oldlen, old,
1147                       (unsigned long)data->fid2.mds,
1148                       (unsigned long)data->fid2.id,
1149                       (unsigned long)data->fid2.generation, newlen, new);
1150
1151         rc = lmv_check_connect(obd);
1152         if (rc)
1153                 RETURN(rc);
1154
1155         if (oldlen == 0) {
1156                 /* MDS with old dir entry is asking another MDS to create name
1157                  * there */
1158                 CDEBUG(D_OTHER,
1159                        "create %*s(%d/%d) in %lu/%lu/%lu pointing to %lu/%lu/%lu\n",
1160                        newlen, new, oldlen, newlen,
1161                        (unsigned long)data->fid2.mds,
1162                        (unsigned long)data->fid2.id,
1163                        (unsigned long)data->fid2.generation,
1164                        (unsigned long)data->fid1.mds,
1165                        (unsigned long)data->fid1.id,
1166                        (unsigned long)data->fid1.generation);
1167                 mds = data->fid2.mds;
1168                 goto request;
1169         }
1170
1171         obj = lmv_grab_obj(obd, &data->fid1);
1172         if (obj) {
1173                 /* directory is already splitted, so we have to forward request
1174                  * to the right MDS */
1175                 mds = raw_name2idx(obj->hashtype, obj->objcount, (char *)old, oldlen);
1176                 data->fid1 = obj->objs[mds].fid;
1177                 CDEBUG(D_OTHER, "forward to MDS #%u (%lu/%lu/%lu)\n", mds,
1178                        (unsigned long)obj->objs[mds].fid.mds,
1179                        (unsigned long)obj->objs[mds].fid.id,
1180                        (unsigned long)obj->objs[mds].fid.generation);
1181                 lmv_put_obj(obj);
1182         }
1183
1184         obj = lmv_grab_obj(obd, &data->fid2);
1185         if (obj) {
1186                 /* directory is already splitted, so we have to forward request
1187                  * to the right MDS */
1188                 mds = raw_name2idx(obj->hashtype, obj->objcount, (char *)new, newlen);
1189                 data->fid2 = obj->objs[mds].fid;
1190                 CDEBUG(D_OTHER, "forward to MDS #%u (%lu/%lu/%lu)\n", mds,
1191                        (unsigned long)obj->objs[mds].fid.mds,
1192                        (unsigned long)obj->objs[mds].fid.id,
1193                        (unsigned long)obj->objs[mds].fid.generation);
1194                 lmv_put_obj(obj);
1195         }
1196
1197         mds = data->fid1.mds;
1198
1199 request:
1200         rc = md_rename(lmv->tgts[mds].ltd_exp, data, old, oldlen,
1201                        new, newlen, request);
1202         RETURN(rc);
1203 }
1204
1205 int lmv_setattr(struct obd_export *exp, struct mdc_op_data *data,
1206                 struct iattr *iattr, void *ea, int ealen, void *ea2,
1207                 int ea2len, struct ptlrpc_request **request)
1208 {
1209         struct obd_device *obd = exp->exp_obd;
1210         struct lmv_obd *lmv = &obd->u.lmv;
1211         struct ptlrpc_request *req;
1212         struct mds_body *body;
1213         struct lmv_obj *obj;
1214         int rc = 0, i;
1215         ENTRY;
1216
1217         rc = lmv_check_connect(obd);
1218         if (rc)
1219                 RETURN(rc);
1220
1221         obj = lmv_grab_obj(obd, &data->fid1);
1222
1223         CDEBUG(D_OTHER, "SETATTR for %lu/%lu/%lu, valid 0x%x%s\n",
1224                (unsigned long)data->fid1.mds, (unsigned long)data->fid1.id,
1225                (unsigned long)data->fid1.generation, iattr->ia_valid,
1226                obj ? ", splitted" : "");
1227
1228         if (obj) {
1229                 for (i = 0; i < obj->objcount; i++) {
1230                         data->fid1 = obj->objs[i].fid;
1231
1232                         rc = md_setattr(lmv->tgts[data->fid1.mds].ltd_exp, data,
1233                                         iattr, ea, ealen, ea2, ea2len, &req);
1234
1235                         if (fid_equal(&obj->fid, &obj->objs[i].fid)) {
1236                                 /* this is master object and this request should
1237                                  * be returned back to llite */
1238                                 *request = req;
1239                         } else {
1240                                 ptlrpc_req_finished(req);
1241                         }
1242
1243                         if (rc)
1244                                 break;
1245                 }
1246                 lmv_put_obj(obj);
1247         } else {
1248                 LASSERT(data->fid1.mds < lmv->desc.ld_tgt_count);
1249                 rc = md_setattr(lmv->tgts[data->fid1.mds].ltd_exp, data,
1250                                 iattr, ea, ealen, ea2, ea2len, request);
1251                 if (rc == 0) {
1252                         body = lustre_msg_buf((*request)->rq_repmsg, 0,
1253                                               sizeof(*body));
1254                         LASSERT(body != NULL);
1255                         LASSERT(body->mds == data->fid1.mds);
1256                 }
1257         }
1258         RETURN(rc);
1259 }
1260
1261 int lmv_sync(struct obd_export *exp, struct ll_fid *fid,
1262              struct ptlrpc_request **request)
1263 {
1264         struct obd_device *obd = exp->exp_obd;
1265         struct lmv_obd *lmv = &obd->u.lmv;
1266         int rc;
1267         ENTRY;
1268
1269         rc = lmv_check_connect(obd);
1270         if (rc)
1271                 RETURN(rc);
1272
1273         rc = md_sync(lmv->tgts[fid->mds].ltd_exp, fid, request);
1274         RETURN(rc);
1275 }
1276
1277 int lmv_dirobj_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1278                             void *data, int flag)
1279 {
1280         struct lustre_handle lockh;
1281         struct lmv_obj *obj;
1282         int rc;
1283         ENTRY;
1284
1285         switch (flag) {
1286         case LDLM_CB_BLOCKING:
1287                 ldlm_lock2handle(lock, &lockh);
1288                 rc = ldlm_cli_cancel(&lockh);
1289                 if (rc < 0) {
1290                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
1291                         RETURN(rc);
1292                 }
1293                 break;
1294         case LDLM_CB_CANCELING:
1295                 /* time to drop cached attrs for dirobj */
1296                 obj = lock->l_ast_data;
1297                 if (obj) {
1298                         CDEBUG(D_OTHER, "cancel %s on "LPU64"/"LPU64
1299                                ", master %u/"LPU64"/%u\n",
1300                                lock->l_resource->lr_name.name[3] == 1 ?
1301                                         "LOOKUP" : "UPDATE",
1302                                lock->l_resource->lr_name.name[0],
1303                                lock->l_resource->lr_name.name[1], obj->fid.mds,
1304                                obj->fid.id, obj->fid.generation);
1305                         lmv_put_obj(obj);
1306                 }
1307                 break;
1308         default:
1309                 LBUG();
1310         }
1311         RETURN(0);
1312 }
1313
1314 void lmv_remove_dots(struct page *page)
1315 {
1316         char *kaddr = page_address(page);
1317         unsigned limit = PAGE_CACHE_SIZE;
1318         unsigned offs, rec_len;
1319         struct ext2_dir_entry_2 *p;
1320
1321         for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
1322                 p = (struct ext2_dir_entry_2 *)(kaddr + offs);
1323                 rec_len = le16_to_cpu(p->rec_len);
1324
1325                 if ((p->name_len == 1 && p->name[0] == '.') ||
1326                     (p->name_len == 2 && p->name[0] == '.' && p->name[1] == '.'))
1327                         p->inode = 0;
1328         }
1329 }
1330
1331 int lmv_readpage(struct obd_export *exp, struct ll_fid *mdc_fid,
1332                  __u64 offset, struct page *page,
1333                  struct ptlrpc_request **request)
1334 {
1335         struct obd_device *obd = exp->exp_obd;
1336         struct lmv_obd *lmv = &obd->u.lmv;
1337         struct ll_fid rfid = *mdc_fid;
1338         struct lmv_obj *obj;
1339         int rc, i;
1340         ENTRY;
1341
1342         rc = lmv_check_connect(obd);
1343         if (rc)
1344                 RETURN(rc);
1345
1346         LASSERT(mdc_fid->mds < lmv->desc.ld_tgt_count);
1347         CDEBUG(D_OTHER, "READPAGE at %llu from %lu/%lu/%lu\n",
1348                offset, (unsigned long) rfid.mds,
1349                (unsigned long) rfid.id,
1350                (unsigned long) rfid.generation);
1351
1352         obj = lmv_grab_obj(obd, mdc_fid);
1353         if (obj) {
1354                 lmv_lock_obj(obj);
1355
1356                 /* find dirobj containing page with requested offset. */
1357                 for (i = 0; i < obj->objcount; i++) {
1358                         if (offset < obj->objs[i].size)
1359                                 break;
1360                         offset -= obj->objs[i].size;
1361                 }
1362                 rfid = obj->objs[i].fid;
1363
1364                 lmv_unlock_obj(obj);
1365                 lmv_put_obj(obj);
1366
1367                 CDEBUG(D_OTHER, "forward to %lu/%lu/%lu with offset %lu\n",
1368                        (unsigned long)rfid.mds, (unsigned long)rfid.id,
1369                        (unsigned long)rfid.generation, (unsigned long)offset);
1370         }
1371         rc = md_readpage(lmv->tgts[rfid.mds].ltd_exp, &rfid, offset,
1372                          page, request);
1373
1374         if (rc == 0 && !fid_equal(&rfid, mdc_fid))
1375                 /* this page isn't from master object. To avoid "." and ".."
1376                  * duplication in directory, we have to remove them from all
1377                  * slave objects */
1378                 lmv_remove_dots(page);
1379
1380         RETURN(rc);
1381 }
1382
1383 int lmv_unlink_slaves(struct obd_export *exp, struct mdc_op_data *data,
1384                       struct ptlrpc_request **req)
1385 {
1386         struct obd_device *obd = exp->exp_obd;
1387         struct lmv_obd *lmv = &obd->u.lmv;
1388         struct mea *mea = data->mea1;
1389         struct mdc_op_data data2;
1390         int i, rc = 0, mds;
1391         ENTRY;
1392
1393         LASSERT(mea != NULL);
1394         for (i = 0; i < mea->mea_count; i++) {
1395                 memset(&data2, 0, sizeof(data2));
1396                 data2.fid1 = mea->mea_fids[i];
1397                 data2.create_mode = MDS_MODE_DONT_LOCK | S_IFDIR;
1398                 mds = data2.fid1.mds;
1399
1400                 if (lmv->tgts[mds].ltd_exp == NULL)
1401                         continue;
1402
1403                 rc = md_unlink(lmv->tgts[mds].ltd_exp, &data2, req);
1404                 CDEBUG(D_OTHER, "unlink slave %lu/%lu/%lu -> %d\n",
1405                        (unsigned long) mea->mea_fids[i].mds,
1406                        (unsigned long) mea->mea_fids[i].id,
1407                        (unsigned long) mea->mea_fids[i].generation, rc);
1408                 if (*req) {
1409                         ptlrpc_req_finished(*req);
1410                         *req = NULL;
1411                 }
1412                 if (rc)
1413                         break;
1414         }
1415         RETURN(rc);
1416 }
1417
1418 int lmv_delete_object(struct obd_export *exp, struct ll_fid *fid)
1419 {
1420         ENTRY;
1421
1422         if (!lmv_delete_obj(exp, fid)) {
1423                 CDEBUG(D_OTHER, "Object %lu/%lu/%lu is not found.\n",
1424                        (unsigned long)fid->mds, (unsigned long)fid->id,
1425                        (unsigned long)fid->generation);
1426         }
1427
1428         RETURN(0);
1429 }
1430
1431 int lmv_unlink(struct obd_export *exp, struct mdc_op_data *data,
1432                struct ptlrpc_request **request)
1433 {
1434         struct obd_device *obd = exp->exp_obd;
1435         struct lmv_obd *lmv = &obd->u.lmv;
1436         int rc, i = 0;
1437         ENTRY;
1438
1439         rc = lmv_check_connect(obd);
1440         if (rc)
1441                 RETURN(rc);
1442
1443         if (data->namelen == 0 && data->mea1 != NULL) {
1444                 /* mds asks to remove slave objects */
1445                 rc = lmv_unlink_slaves(exp, data, request);
1446                 RETURN(rc);
1447         } else if (data->namelen != 0) {
1448                 struct lmv_obj *obj;
1449
1450                 obj = lmv_grab_obj(obd, &data->fid1);
1451                 if (obj) {
1452                         i = raw_name2idx(obj->hashtype, obj->objcount, data->name,
1453                                          data->namelen);
1454                         data->fid1 = obj->objs[i].fid;
1455                         lmv_put_obj(obj);
1456                 }
1457                 CDEBUG(D_OTHER, "unlink '%*s' in %lu/%lu/%lu -> %u\n",
1458                        data->namelen, data->name,
1459                        (unsigned long) data->fid1.mds,
1460                        (unsigned long) data->fid1.id,
1461                        (unsigned long) data->fid1.generation, i);
1462         } else {
1463                 CDEBUG(D_OTHER, "drop i_nlink on %lu/%lu/%lu\n",
1464                        (unsigned long) data->fid1.mds,
1465                        (unsigned long) data->fid1.id,
1466                        (unsigned long) data->fid1.generation);
1467         }
1468         rc = md_unlink(lmv->tgts[data->fid1.mds].ltd_exp, data, request);
1469         RETURN(rc);
1470 }
1471
1472 struct obd_device *lmv_get_real_obd(struct obd_export *exp,
1473                                     char *name, int len)
1474 {
1475         struct obd_device *obd = exp->exp_obd;
1476         struct lmv_obd *lmv = &obd->u.lmv;
1477         int rc;
1478         ENTRY;
1479
1480         rc = lmv_check_connect(obd);
1481         if (rc)
1482                 RETURN(ERR_PTR(rc));
1483 #warning "we need well-desgined readdir() implementation to remove this mess"
1484         obd = lmv->tgts[0].ltd_exp->exp_obd;
1485         EXIT;
1486         return obd;
1487 }
1488
1489 int lmv_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
1490 {
1491         struct obd_device *obd = exp->exp_obd;
1492         struct lmv_obd *lmv = &obd->u.lmv;
1493         int i, rc = 0, change = 0;
1494         ENTRY;
1495
1496         if (lmv->max_easize < easize) {
1497                 lmv->max_easize = easize;
1498                 change = 1;
1499         }
1500         if (lmv->max_cookiesize < cookiesize) {
1501                 lmv->max_cookiesize = cookiesize;
1502                 change = 1;
1503         }
1504         if (change == 0)
1505                 RETURN(0);
1506
1507         if (lmv->connected == 0)
1508                 RETURN(0);
1509
1510         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1511                 if (lmv->tgts[i].ltd_exp == NULL) {
1512                         CWARN("%s: NULL export for %d\n", obd->obd_name, i);
1513                         continue;
1514                 }
1515
1516                 rc = obd_init_ea_size(lmv->tgts[i].ltd_exp, easize, cookiesize);
1517                 if (rc) {
1518                         CERROR("obd_init_ea_size() failed on MDT target %d, "
1519                                "error %d.\n", i, rc);
1520                         break;
1521                 }
1522         }
1523         RETURN(rc);
1524 }
1525
1526 int lmv_obd_create_single(struct obd_export *exp, struct obdo *oa,
1527                           struct lov_stripe_md **ea, struct obd_trans_info *oti)
1528 {
1529         struct obd_device *obd = exp->exp_obd;
1530         struct lmv_obd *lmv = &obd->u.lmv;
1531         struct lov_stripe_md obj_md;
1532         struct lov_stripe_md *obj_mdp = &obj_md;
1533         int rc = 0;
1534         ENTRY;
1535
1536         LASSERT(ea == NULL);
1537         LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
1538
1539         rc = obd_create(lmv->tgts[oa->o_mds].ltd_exp, oa, &obj_mdp, oti);
1540
1541         RETURN(rc);
1542 }
1543
1544 /*
1545  * to be called from MDS only
1546  */
1547 int lmv_obd_create(struct obd_export *exp, struct obdo *oa,
1548                    struct lov_stripe_md **ea, struct obd_trans_info *oti)
1549 {
1550         struct obd_device *obd = exp->exp_obd;
1551         struct lmv_obd *lmv = &obd->u.lmv;
1552         int i, c, rc = 0;
1553         struct mea *mea;
1554         struct ll_fid mfid;
1555         int lcount;
1556         ENTRY;
1557
1558         rc = lmv_check_connect(obd);
1559         if (rc)
1560                 RETURN(rc);
1561
1562         LASSERT(oa != NULL);
1563
1564         if (ea == NULL) {
1565                 rc = lmv_obd_create_single(exp, oa, NULL, oti);
1566                 RETURN(rc);
1567         }
1568
1569         if (*ea == NULL) {
1570                 rc = obd_alloc_diskmd(exp, (struct lov_mds_md **)ea);
1571                 if (rc < 0) {
1572                         CERROR("obd_alloc_diskmd() failed, error %d\n",
1573                                rc);
1574                         RETURN(rc);
1575                 }
1576
1577                 if (*ea == NULL)
1578                         RETURN(-EINVAL);
1579         }
1580
1581         rc = 0;
1582         mfid.id = oa->o_id;
1583         mfid.generation = oa->o_generation;
1584
1585         mea = (struct mea *)*ea;
1586         if (!mea->mea_count || mea->mea_count > lmv->desc.ld_tgt_count)
1587                 mea->mea_count = lmv->desc.ld_tgt_count;
1588         mea->mea_magic = MEA_MAGIC_ALL_CHARS;
1589
1590         mea->mea_master = -1;
1591         lcount = lmv->desc.ld_tgt_count;
1592         for (i = 0, c = 0; c < mea->mea_count && i < lcount; i++) {
1593                 struct lov_stripe_md obj_md;
1594                 struct lov_stripe_md *obj_mdp = &obj_md;
1595
1596                 if (lmv->tgts[i].ltd_exp == NULL) {
1597                         /* this is master MDS */
1598                         mea->mea_fids[c].id = mfid.id;
1599                         mea->mea_fids[c].generation = mfid.generation;
1600                         mea->mea_fids[c].mds = i;
1601                         mea->mea_master = i;
1602                         c++;
1603                         continue;
1604                 }
1605
1606                 /* "master" MDS should always be part of stripped dir, so scan
1607                    for it. */
1608                 if (mea->mea_master == -1 && c == mea->mea_count - 1)
1609                         continue;
1610
1611                 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLTYPE | OBD_MD_FLMODE
1612                         | OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLID;
1613
1614                 rc = obd_create(lmv->tgts[c].ltd_exp, oa, &obj_mdp, oti);
1615                 if (rc) {
1616                         CERROR("obd_create() failed on MDT target %d, "
1617                                "error %d\n", c, rc);
1618                         RETURN(rc);
1619                 }
1620
1621                 mea->mea_fids[c].id = oa->o_id;
1622                 mea->mea_fids[c].generation = oa->o_generation;
1623                 mea->mea_fids[c].mds = i;
1624                 c++;
1625                 CDEBUG(D_OTHER, "dirobj at mds %d: "LPU64"/%u\n",
1626                        i, oa->o_id, oa->o_generation);
1627         }
1628         LASSERT(c == mea->mea_count);
1629         CDEBUG(D_OTHER, "%d dirobjects created\n", (int) mea->mea_count);
1630
1631         RETURN(rc);
1632 }
1633
1634 static int lmv_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
1635                          struct obd_device *tgt, int count,
1636                          struct llog_catid *logid)
1637 {
1638         struct llog_ctxt *ctxt;
1639         int rc;
1640         ENTRY;
1641
1642         rc = obd_llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
1643                             &llog_client_ops);
1644         if (rc == 0) {
1645                 ctxt = llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT);
1646                 ctxt->loc_imp = tgt->u.cli.cl_import;
1647         }
1648
1649         RETURN(rc);
1650 }
1651
1652 static int lmv_llog_finish(struct obd_device *obd,
1653                            struct obd_llogs *llogs, int count)
1654 {
1655         int rc;
1656         ENTRY;
1657
1658         rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT));
1659         RETURN(rc);
1660 }
1661
1662 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
1663                         void *key, __u32 *vallen, void *val)
1664 {
1665         struct obd_device *obd;
1666         struct lmv_obd *lmv;
1667         ENTRY;
1668
1669         obd = class_exp2obd(exp);
1670         if (obd == NULL) {
1671                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1672                        exp->exp_handle.h_cookie);
1673                 RETURN(-EINVAL);
1674         }
1675
1676         lmv = &obd->u.lmv;
1677         if (keylen == 6 && memcmp(key, "mdsize", 6) == 0) {
1678                 __u32 *mdsize = val;
1679                 *vallen = sizeof(__u32);
1680                 *mdsize = sizeof(struct ll_fid) * lmv->desc.ld_tgt_count
1681                                 + sizeof(struct mea);
1682                 RETURN(0);
1683         } else if (keylen == 6 && memcmp(key, "mdsnum", 6) == 0) {
1684                 struct obd_uuid *cluuid = &lmv->cluuid;
1685                 struct lmv_tgt_desc *tgts;
1686                 __u32 *mdsnum = val;
1687                 int i;
1688
1689                 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
1690                         if (obd_uuid_equals(&tgts->uuid, cluuid)) {
1691                                 *vallen = sizeof(__u32);
1692                                 *mdsnum = i;
1693                                 RETURN(0);
1694                         }
1695                 }
1696                 LASSERT(0);
1697         }
1698
1699         CDEBUG(D_IOCTL, "invalid key\n");
1700         RETURN(-EINVAL);
1701 }
1702
1703 int lmv_set_info(struct obd_export *exp, obd_count keylen,
1704                  void *key, obd_count vallen, void *val)
1705 {
1706         struct obd_device *obd;
1707         struct lmv_obd *lmv;
1708         ENTRY;
1709
1710         obd = class_exp2obd(exp);
1711         if (obd == NULL) {
1712                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1713                        exp->exp_handle.h_cookie);
1714                 RETURN(-EINVAL);
1715         }
1716         lmv = &obd->u.lmv;
1717
1718         if (keylen >= strlen("inter_mds") && strcmp(key, "inter_mds") == 0) {
1719                 lmv->server_timeout = 1;
1720                 lmv_set_timeouts(obd);
1721                 RETURN(0);
1722         }
1723
1724         RETURN(-EINVAL);
1725 }
1726
1727 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
1728                struct lov_stripe_md *lsm)
1729 {
1730         struct obd_device *obd = class_exp2obd(exp);
1731         struct lmv_obd *lmv = &obd->u.lmv;
1732         int mea_size;
1733         ENTRY;
1734
1735         mea_size = sizeof(struct ll_fid) *
1736                 lmv->desc.ld_tgt_count + sizeof(struct mea);
1737         if (!lmmp)
1738                 RETURN(mea_size);
1739
1740         if (*lmmp && !lsm) {
1741                 OBD_FREE(*lmmp, mea_size);
1742                 *lmmp = NULL;
1743                 RETURN(0);
1744         }
1745
1746         if (*lmmp == NULL) {
1747                 OBD_ALLOC(*lmmp, mea_size);
1748                 if (*lmmp == NULL)
1749                         RETURN(-ENOMEM);
1750         }
1751
1752         if (!lsm)
1753                 RETURN(mea_size);
1754
1755 #warning "MEA packing/convertation must be here! -bzzz"
1756         memcpy(*lmmp, lsm, mea_size);
1757         RETURN(mea_size);
1758 }
1759
1760 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **mem_tgt,
1761                  struct lov_mds_md *disk_src, int mdsize)
1762 {
1763         struct obd_device *obd = class_exp2obd(exp);
1764         struct lmv_obd *lmv = &obd->u.lmv;
1765         struct mea **tmea = (struct mea **) mem_tgt;
1766         struct mea *mea = (void *) disk_src;
1767         int mea_size;
1768         ENTRY;
1769
1770         mea_size = sizeof(struct ll_fid) *
1771                 lmv->desc.ld_tgt_count + sizeof(struct mea);
1772         if (mem_tgt == NULL)
1773                 return mea_size;
1774
1775         if (*mem_tgt != NULL && disk_src == NULL) {
1776                 OBD_FREE(*tmea, mea_size);
1777                 RETURN(0);
1778         }
1779
1780         LASSERT(mea_size == mdsize);
1781
1782         OBD_ALLOC(*tmea, mea_size);
1783         if (*tmea == NULL)
1784                 RETURN(-ENOMEM);
1785
1786         if (!disk_src)
1787                 RETURN(mea_size);
1788
1789 #warning "MEA unpacking/convertation must be here! -bzzz"
1790         memcpy(*tmea, mea, mdsize);
1791         RETURN(mea_size);
1792 }
1793
1794 int lmv_brw(int rw, struct obd_export *exp, struct obdo *oa,
1795             struct lov_stripe_md *ea, obd_count oa_bufs,
1796             struct brw_page *pgarr, struct obd_trans_info *oti)
1797 {
1798         struct obd_device *obd = exp->exp_obd;
1799         struct lmv_obd *lmv = &obd->u.lmv;
1800         struct mea *mea = (struct mea *) ea;
1801         int err;
1802
1803         LASSERT(oa != NULL);
1804         LASSERT(ea != NULL);
1805         LASSERT(pgarr != NULL);
1806         LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
1807
1808         oa->o_gr = mea->mea_fids[oa->o_mds].generation;
1809         oa->o_id = mea->mea_fids[oa->o_mds].id;
1810         oa->o_valid =  OBD_MD_FLID | OBD_MD_FLGROUP;
1811         err = obd_brw(rw, lmv->tgts[oa->o_mds].ltd_exp, oa,
1812                       NULL, oa_bufs, pgarr, oti);
1813         RETURN(err);
1814 }
1815
1816 struct obd_ops lmv_obd_ops = {
1817         .o_owner                = THIS_MODULE,
1818         .o_attach               = lmv_attach,
1819         .o_detach               = lmv_detach,
1820         .o_setup                = lmv_setup,
1821         .o_cleanup              = lmv_cleanup,
1822         .o_connect              = lmv_connect,
1823         .o_disconnect           = lmv_disconnect,
1824         .o_statfs               = lmv_statfs,
1825         .o_llog_init            = lmv_llog_init,
1826         .o_llog_finish          = lmv_llog_finish,
1827         .o_get_info             = lmv_get_info,
1828         .o_set_info             = lmv_set_info,
1829         .o_create               = lmv_obd_create,
1830         .o_packmd               = lmv_packmd,
1831         .o_unpackmd             = lmv_unpackmd,
1832         .o_brw                  = lmv_brw,
1833         .o_init_ea_size         = lmv_init_ea_size,
1834         .o_notify               = lmv_notify,
1835         .o_iocontrol            = lmv_iocontrol,
1836 };
1837
1838 struct md_ops lmv_md_ops = {
1839         .m_getstatus            = lmv_getstatus,
1840         .m_getattr              = lmv_getattr,
1841         .m_change_cbdata        = lmv_change_cbdata,
1842         .m_change_cbdata_name   = lmv_change_cbdata_name,
1843         .m_close                = lmv_close,
1844         .m_create               = lmv_create,
1845         .m_done_writing         = lmv_done_writing,
1846         .m_enqueue              = lmv_enqueue,
1847         .m_getattr_name         = lmv_getattr_name,
1848         .m_intent_lock          = lmv_intent_lock,
1849         .m_link                 = lmv_link,
1850         .m_rename               = lmv_rename,
1851         .m_setattr              = lmv_setattr,
1852         .m_sync                 = lmv_sync,
1853         .m_readpage             = lmv_readpage,
1854         .m_unlink               = lmv_unlink,
1855         .m_get_real_obd         = lmv_get_real_obd,
1856         .m_valid_attrs          = lmv_valid_attrs,
1857         .m_delete_object        = lmv_delete_object,
1858 };
1859
1860 int __init lmv_init(void)
1861 {
1862         struct lprocfs_static_vars lvars;
1863         int rc;
1864
1865         lprocfs_init_vars(lmv, &lvars);
1866         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
1867                                  lvars.module_vars, OBD_LMV_DEVICENAME);
1868         RETURN(rc);
1869 }
1870
1871 #ifdef __KERNEL__
1872 static void lmv_exit(void)
1873 {
1874         class_unregister_type(OBD_LMV_DEVICENAME);
1875 }
1876
1877 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1878 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
1879 MODULE_LICENSE("GPL");
1880
1881 module_init(lmv_init);
1882 module_exit(lmv_exit);
1883 #endif