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                 CDEBUG(D_INFO, "lmv idx %d is %s conn "LPX64"\n",
  72                        i, tgt->uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
  73                 if (strncmp(uuid->uuid, tgt->uuid.uuid, sizeof uuid->uuid) == 0)
  74                         break;
  75         }
  76
  77         if (i == lmv->desc.ld_tgt_count)
  78                 GOTO(out, rc = -EINVAL);
  79
  80         obd = class_exp2obd(tgt->ltd_exp);
  81         if (obd == NULL) {
  82                 /* This can happen if OST failure races with node shutdown */
  83                 GOTO(out, rc = -ENOTCONN);
  84         }
  85
  86         CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
  87                obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
  88                obd->obd_type->typ_name, i);
  89         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
  90
  91         if (tgt->active == activate) {
  92                 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
  93                        activate ? "" : "in");
  94                 GOTO(out, rc);
  95         }
  96
  97         CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd, activate ? "" : "in");
  98
  99         tgt->active = activate;
 100         if (activate)
 101                 lmv->desc.ld_active_tgt_count++;
 102         else
 103                 lmv->desc.ld_active_tgt_count--;
 104
 105         EXIT;
 106  out:
 107         spin_unlock(&lmv->lmv_lock);
 108         return rc;
 109 }
 110
 111 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
 112                       int active)
 113 {
 114         int rc;
 115         struct obd_uuid *uuid;
 116
 117         if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 118                 CERROR("unexpected notification of %s %s!\n",
 119                        watched->obd_type->typ_name,
 120                        watched->obd_name);
 121                 return -EINVAL;
 122         }
 123         uuid = &watched->u.cli.cl_import->imp_target_uuid;
 124
 125         /* Set MDC as active before notifying the observer, so the
 126          * observer can use the MDC normally.
 127          */
 128         rc = lmv_set_mdc_active(&obd->u.lmv, uuid, active);
 129         if (rc) {
 130                 CERROR("%sactivation of %s failed: %d\n",
 131                        active ? "" : "de", uuid->uuid, rc);
 132                 RETURN(rc);
 133         }
 134
 135         if (obd->obd_observer)
 136                 /* Pass the notification up the chain. */
 137                 rc = obd_notify(obd->obd_observer, watched, active);
 138
 139         RETURN(rc);
 140 }
 141
 142 int lmv_attach(struct obd_device *dev, obd_count len, void *data)
 143 {
 144         struct lprocfs_static_vars lvars;
 145         int rc;
 146         ENTRY;
 147
 148         lprocfs_init_vars(lmv, &lvars);
 149         rc = lprocfs_obd_attach(dev, lvars.obd_vars);
 150         if (rc == 0) {
 151 #ifdef __KERNEL__
 152                 struct proc_dir_entry *entry;
 153
 154                 entry = create_proc_entry("target_obd", 0444, dev->obd_proc_entry);
 155                 if (entry == NULL)
 156                         RETURN(-ENOMEM);
 157                 /* entry->proc_fops = &lmv_proc_target_fops; */
 158                 entry->data = dev;
 159 #endif
 160        }
 161         RETURN (rc);
 162 }
 163
 164 int lmv_detach(struct obd_device *dev)
 165 {
 166         return lprocfs_obd_detach(dev);
 167 }
 168
 169 /* This is fake connect function. Its purpose is to initialize lmv and
 170  * say caller that everything is okay. Real connection will be performed
 171  * later. */
 172 static int lmv_connect(struct lustre_handle *conn, struct obd_device *obd,
 173                        struct obd_uuid *cluuid)
 174 {
 175         struct lmv_obd *lmv = &obd->u.lmv;
 176         struct obd_export *exp;
 177         int rc;
 178         ENTRY;
 179
 180         rc = class_connect(conn, obd, cluuid);
 181         if (rc) {
 182                 CERROR("class_connection() returned %d\n", rc);
 183                 RETURN(rc);
 184         }
 185
 186         exp = class_conn2export(conn);
 187         /* We don't want to actually do the underlying connections more than
 188          * once, so keep track. */
 189         lmv->refcount++;
 190         if (lmv->refcount > 1) {
 191                 class_export_put(exp);
 192                 RETURN(0);
 193         }
 194
 195         lmv->cluuid = *cluuid;
 196         lmv->connected = 0;
 197         lmv->exp = exp;
 198
 199         RETURN(0);
 200 }
 201
 202 void lmv_set_timeouts(struct obd_device *obd)
 203 {
 204         struct lmv_tgt_desc *tgts;
 205         struct lmv_obd *lmv;
 206         int i;
 207
 208         lmv = &obd->u.lmv;
 209         if (lmv->server_timeout == 0)
 210                 return;
 211
 212         if (lmv->connected == 0)
 213                 return;
 214
 215         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 216                 if (tgts->ltd_exp == NULL)
 217                         continue;
 218                 obd_set_info(tgts->ltd_exp, strlen("inter_mds"),
 219                              "inter_mds", 0, NULL);
 220         }
 221 }
 222
 223 /* Performs a check if passed obd is connected. If no - connect it. */
 224 int lmv_check_connect(struct obd_device *obd) {
 225         struct lmv_obd *lmv = &obd->u.lmv;
 226         struct obd_uuid *cluuid;
 227         struct lmv_tgt_desc *tgts;
 228         struct obd_export *exp;
 229         int rc, rc2, i;
 230         ENTRY;
 231
 232         if (lmv->connected)
 233                 RETURN(0);
 234
 235         lmv->connected = 1;
 236         cluuid = &lmv->cluuid;
 237         exp = lmv->exp;
 238         CDEBUG(D_OTHER, "time to connect %s to %s\n",
 239                         cluuid->uuid, obd->obd_name);
 240
 241         for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
 242                 struct obd_device *tgt_obd;
 243                 struct obd_uuid lmv_osc_uuid = { "LMV_OSC_UUID" };
 244                 struct lustre_handle conn = {0, };
 245
 246                 LASSERT(tgts != NULL);
 247
 248                 tgt_obd = class_find_client_obd(&tgts->uuid, LUSTRE_MDC_NAME,
 249                                                 &obd->obd_uuid);
 250                 if (!tgt_obd) {
 251                         CERROR("Target %s not attached\n", tgts->uuid.uuid);
 252                         GOTO(out_disc, rc = -EINVAL);
 253                 }
 254
 255                 /* for MDS: don't connect to yourself */
 256                 if (obd_uuid_equals(&tgts->uuid, cluuid)) {
 257                         CDEBUG(D_OTHER, "don't connect back to %s\n",
 258                                cluuid->uuid);
 259                         tgts->ltd_exp = NULL;
 260                         continue;
 261                 }
 262
 263                 CDEBUG(D_OTHER, "connect to %s(%s) - %s, %s FOR %s\n",
 264                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 265                         tgts->uuid.uuid, obd->obd_uuid.uuid,
 266                         cluuid->uuid);
 267
 268                 if (!tgt_obd->obd_set_up) {
 269                         CERROR("Target %s not set up\n", tgts->uuid.uuid);
 270                         GOTO(out_disc, rc = -EINVAL);
 271                 }
 272
 273                 rc = obd_connect(&conn, tgt_obd, &lmv_osc_uuid);
 274                 if (rc) {
 275                         CERROR("Target %s connect error %d\n",
 276                                 tgts->uuid.uuid, rc);
 277                         GOTO(out_disc, rc);
 278                 }
 279                 tgts->ltd_exp = class_conn2export(&conn);
 280
 281                 obd_init_ea_size(tgts->ltd_exp, lmv->max_easize,
 282                                  lmv->max_cookiesize);
 283
 284                 rc = obd_register_observer(tgt_obd, obd);
 285                 if (rc) {
 286                         CERROR("Target %s register_observer error %d\n",
 287                                tgts->uuid.uuid, rc);
 288                         obd_disconnect(tgts->ltd_exp, 0);
 289                         GOTO(out_disc, rc);
 290                 }
 291
 292                 lmv->desc.ld_active_tgt_count++;
 293                 tgts->active = 1;
 294
 295                 CDEBUG(D_OTHER, "connected to %s(%s) successfully (%d)\n",
 296                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 297                         atomic_read(&obd->obd_refcount));
 298         }
 299
 300         lmv_set_timeouts(obd);
 301
 302         class_export_put(exp);
 303         RETURN (0);
 304
 305  out_disc:
 306         while (i-- > 0) {
 307                 struct obd_uuid uuid;
 308                 --tgts;
 309                 --lmv->desc.ld_active_tgt_count;
 310                 tgts->active = 0;
 311                 /* save for CERROR below; (we know it's terminated) */
 312                 uuid = tgts->uuid;
 313                 rc2 = obd_disconnect(tgts->ltd_exp, 0);
 314                 if (rc2)
 315                         CERROR("error: LMV target %s disconnect on MDT idx %d: "
 316                                "rc = %d\n", uuid.uuid, i, rc2);
 317         }
 318         class_disconnect(exp, 0);
 319         RETURN (rc);
 320 }
 321
 322 static int lmv_disconnect(struct obd_export *exp, int flags)
 323 {
 324         struct obd_device *obd = class_exp2obd(exp);
 325         struct lmv_obd *lmv = &obd->u.lmv;
 326         int rc, i;
 327         ENTRY;
 328
 329         if (!lmv->tgts)
 330                 goto out_local;
 331
 332         /* Only disconnect the underlying layers on the final disconnect. */
 333         lmv->refcount--;
 334         if (lmv->refcount != 0)
 335                 goto out_local;
 336
 337         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 338                 if (lmv->tgts[i].ltd_exp == NULL)
 339                         continue;
 340
 341                 if (obd->obd_no_recov) {
 342                         /* Pass it on to our clients.
 343                          * XXX This should be an argument to disconnect,
 344                          * XXX not a back-door flag on the OBD.  Ah well.
 345                          */
 346                         struct obd_device *mdc_obd;
 347                         mdc_obd = class_exp2obd(lmv->tgts[i].ltd_exp);
 348                         if (mdc_obd)
 349                                 mdc_obd->obd_no_recov = 1;
 350                 }
 351
 352                 CDEBUG(D_OTHER, "disconnected from %s(%s) successfully\n",
 353                         lmv->tgts[i].ltd_exp->exp_obd->obd_name,
 354                         lmv->tgts[i].ltd_exp->exp_obd->obd_uuid.uuid);
 355
 356                 obd_register_observer(lmv->tgts[i].ltd_exp->exp_obd, NULL);
 357
 358                 rc = obd_disconnect(lmv->tgts[i].ltd_exp, flags);
 359                 if (lmv->tgts[i].active) {
 360                         lmv->desc.ld_active_tgt_count--;
 361                         lmv->tgts[i].active = 0;
 362                 }
 363                 lmv->tgts[i].ltd_exp = NULL;
 364         }
 365
 366  out_local:
 367         /* FIXME: cleanup here */
 368         if (!lmv->connected)
 369                 class_export_put(exp);
 370         rc = class_disconnect(exp, 0);
 371         RETURN(rc);
 372 }
 373
 374 static int lmv_setup(struct obd_device *obd, obd_count len, void *buf)
 375 {
 376         struct lustre_cfg *lcfg = buf;
 377         struct lmv_desc *desc;
 378         struct lmv_obd *lmv = &obd->u.lmv;
 379         struct obd_uuid *uuids;
 380         struct lmv_tgt_desc *tgts;
 381         int i;
 382         int rc = 0;
 383         ENTRY;
 384
 385         if (lcfg->lcfg_inllen1 < 1) {
 386                 CERROR("LMV setup requires a descriptor\n");
 387                 RETURN(-EINVAL);
 388         }
 389
 390         if (lcfg->lcfg_inllen2 < 1) {
 391                 CERROR("LMV setup requires an OST UUID list\n");
 392                 RETURN(-EINVAL);
 393         }
 394
 395         desc = (struct lmv_desc *)lcfg->lcfg_inlbuf1;
 396         if (sizeof(*desc) > lcfg->lcfg_inllen1) {
 397                 CERROR("descriptor size wrong: %d > %d\n",
 398                        (int)sizeof(*desc), lcfg->lcfg_inllen1);
 399                 RETURN(-EINVAL);
 400         }
 401
 402         uuids = (struct obd_uuid *)lcfg->lcfg_inlbuf2;
 403         if (sizeof(*uuids) * desc->ld_tgt_count != lcfg->lcfg_inllen2) {
 404                 CERROR("UUID array size wrong: %u * %u != %u\n",
 405                        sizeof(*uuids), desc->ld_tgt_count, lcfg->lcfg_inllen2);
 406                 RETURN(-EINVAL);
 407         }
 408
 409         lmv->bufsize = sizeof(struct lmv_tgt_desc) * desc->ld_tgt_count;
 410         OBD_ALLOC(lmv->tgts, lmv->bufsize);
 411         if (lmv->tgts == NULL) {
 412                 CERROR("Out of memory\n");
 413                 RETURN(-EINVAL);
 414         }
 415
 416         lmv->desc = *desc;
 417         spin_lock_init(&lmv->lmv_lock);
 418
 419         for (i = 0, tgts = lmv->tgts; i < desc->ld_tgt_count; i++, tgts++)
 420                 tgts->uuid = uuids[i];
 421
 422         lmv->max_easize = sizeof(struct ll_fid) * desc->ld_tgt_count
 423                 + sizeof(struct mea);
 424         lmv->max_cookiesize = 0;
 425
 426         RETURN(rc);
 427 }
 428
 429 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 430                       unsigned long max_age)
 431 {
 432         struct lmv_obd *lmv = &obd->u.lmv;
 433         struct obd_statfs temp;
 434         int rc = 0, i;
 435         ENTRY;
 436
 437         rc = lmv_check_connect(obd);
 438         if (rc)
 439                 RETURN(rc);
 440
 441         for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 442                 rc = obd_statfs(lmv->tgts[i].ltd_exp->exp_obd, &temp, max_age);
 443                 if (rc) {
 444                         CERROR("can't stat MDS #%d (%s)\n", i,
 445                                lmv->tgts[i].ltd_exp->exp_obd->obd_name);
 446                         RETURN(rc);
 447                 }
 448                 if (i == 0) {
 449                         memcpy(osfs, &temp, sizeof(temp));
 450                 } else {
 451                         osfs->os_bavail += temp.os_bavail;
 452                         osfs->os_blocks += temp.os_blocks;
 453                         osfs->os_ffree += temp.os_ffree;
 454                         osfs->os_files += temp.os_files;
 455                 }
 456         }
 457         RETURN(rc);
 458 }
 459
 460 static int lmv_cleanup(struct obd_device *obd, int flags)
 461 {
 462         struct lmv_obd *lmv = &obd->u.lmv;
 463         ENTRY;
 464         lmv_cleanup_objs(obd);
 465         OBD_FREE(lmv->tgts, lmv->bufsize);
 466         RETURN(0);
 467 }
 468
 469 static int lmv_getstatus(struct obd_export *exp, struct ll_fid *fid)
 470 {
 471         struct obd_device *obd = exp->exp_obd;
 472         struct lmv_obd *lmv = &obd->u.lmv;
 473         int rc;
 474         ENTRY;
 475         rc = lmv_check_connect(obd);
 476         if (rc)
 477                 RETURN(rc);
 478         rc = md_getstatus(lmv->tgts[0].ltd_exp, fid);
 479         fid->mds = 0;
 480         RETURN(rc);
 481 }
 482
 483 static int lmv_getattr(struct obd_export *exp, struct ll_fid *fid,
 484                 unsigned long valid, unsigned int ea_size,
 485                 struct ptlrpc_request **request)
 486 {
 487         struct obd_device *obd = exp->exp_obd;
 488         struct lmv_obd *lmv = &obd->u.lmv;
 489         int rc, i = fid->mds;
 490         struct lmv_obj *obj;
 491         ENTRY;
 492         rc = lmv_check_connect(obd);
 493         if (rc)
 494                 RETURN(rc);
 495         obj = lmv_grab_obj(obd, fid, 0);
 496         CDEBUG(D_OTHER, "GETATTR for %lu/%lu/%lu %s\n",
 497                (unsigned long) fid->mds,
 498                (unsigned long) fid->id,
 499                (unsigned long) fid->generation,
 500                obj ? "(splitted)" : "");
 501
 502         LASSERT(fid->mds < lmv->desc.ld_tgt_count);
 503         rc = md_getattr(lmv->tgts[i].ltd_exp, fid,
 504                              valid, ea_size, request);
 505         if (rc == 0 && obj) {
 506                 /* we have to loop over dirobjs here and gather attrs
 507                  * for all the slaves */
 508 #warning "attrs gathering here"
 509         }
 510         lmv_put_obj(obj);
 511         RETURN(rc);
 512 }
 513
 514 static int lmv_change_cbdata(struct obd_export *exp,
 515                                  struct ll_fid *fid,
 516                                  ldlm_iterator_t it, void *data)
 517 {
 518         struct obd_device *obd = exp->exp_obd;
 519         struct lmv_obd *lmv = &obd->u.lmv;
 520         int rc = 0;
 521         ENTRY;
 522
 523         rc = lmv_check_connect(obd);
 524         if (rc)
 525                 RETURN(rc);
 526         CDEBUG(D_OTHER, "CBDATA for %lu/%lu/%lu\n",
 527                (unsigned long) fid->mds,
 528                (unsigned long) fid->id,
 529                (unsigned long) fid->generation);
 530         LASSERT(fid->mds < lmv->desc.ld_tgt_count);
 531         rc = md_change_cbdata(lmv->tgts[fid->mds].ltd_exp, fid, it, data);
 532         RETURN(rc);
 533 }
 534
 535 static int lmv_change_cbdata_name(struct obd_export *exp, struct ll_fid *pfid,
 536                                   char *name, int len, struct ll_fid *cfid,
 537                                   ldlm_iterator_t it, void *data)
 538 {
 539         struct obd_device *obd = exp->exp_obd;
 540         struct lmv_obd *lmv = &obd->u.lmv;
 541         struct lmv_obj *obj;
 542         int rc = 0, mds;
 543         ENTRY;
 544         rc = lmv_check_connect(obd);
 545         if (rc)
 546                 RETURN(rc);
 547         LASSERT(pfid->mds < lmv->desc.ld_tgt_count);
 548         LASSERT(cfid->mds < lmv->desc.ld_tgt_count);
 549         CDEBUG(D_OTHER, "CBDATA for %lu/%lu/%lu:%*s -> %lu/%lu/%lu\n",
 550                (unsigned long) pfid->mds, (unsigned long) pfid->id,
 551                (unsigned long) pfid->generation, len, name,
 552                (unsigned long) cfid->mds, (unsigned long) cfid->id,
 553                (unsigned long) cfid->generation);
 554
 555         /* this is default mds for directory name belongs to */
 556         mds = pfid->mds;
 557         obj = lmv_grab_obj(obd, pfid, 0);
 558         if (obj) {
 559                 /* directory is splitted. look for right mds for this name */
 560                 mds = raw_name2idx(obj->objcount, name, len);
 561                 lmv_put_obj(obj);
 562         }
 563         rc = md_change_cbdata(lmv->tgts[mds].ltd_exp, cfid, it, data);
 564         RETURN(rc);
 565 }
 566
 567 static int lmv_valid_attrs(struct obd_export *exp, struct ll_fid *fid)
 568 {
 569         struct obd_device *obd = exp->exp_obd;
 570         struct lmv_obd *lmv = &obd->u.lmv;
 571         int rc = 0;
 572         ENTRY;
 573         rc = lmv_check_connect(obd);
 574         if (rc)
 575                 RETURN(rc);
 576         CDEBUG(D_OTHER, "validate %lu/%lu/%lu\n",
 577                (unsigned long) fid->mds,
 578                (unsigned long) fid->id,
 579                (unsigned long) fid->generation);
 580         LASSERT(fid->mds < lmv->desc.ld_tgt_count);
 581         rc = md_valid_attrs(lmv->tgts[fid->mds].ltd_exp, fid);
 582         RETURN(rc);
 583 }
 584
 585 int lmv_close(struct obd_export *exp, struct obdo *obdo,
 586                   struct obd_client_handle *och,
 587                   struct ptlrpc_request **request)
 588 {
 589         struct obd_device *obd = exp->exp_obd;
 590         struct lmv_obd *lmv = &obd->u.lmv;
 591         int rc, i = obdo->o_mds;
 592         ENTRY;
 593         rc = lmv_check_connect(obd);
 594         if (rc)
 595                 RETURN(rc);
 596         LASSERT(i < lmv->desc.ld_tgt_count);
 597         CDEBUG(D_OTHER, "CLOSE %lu/%lu/%lu\n", (unsigned long) obdo->o_mds,
 598                (unsigned long) obdo->o_id, (unsigned long) obdo->o_generation);
 599         rc = md_close(lmv->tgts[i].ltd_exp, obdo, och, request);
 600         RETURN(rc);
 601 }
 602
 603 int lmv_get_mea_and_update_object(struct obd_export *exp, struct ll_fid *fid)
 604 {
 605         struct obd_device *obd = exp->exp_obd;
 606         struct lmv_obd *lmv = &obd->u.lmv;
 607         struct ptlrpc_request *req = NULL;
 608         struct lustre_md md;
 609         unsigned long valid;
 610         int mealen, rc;
 611
 612         md.mea = NULL;
 613         mealen = MEA_SIZE_LMV(lmv);
 614
 615         valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 616
 617         /* time to update mea of parent fid */
 618         rc = md_getattr(lmv->tgts[fid->mds].ltd_exp, fid,
 619                         valid, mealen, &req);
 620         if (rc) {
 621                 CERROR("md_getattr() failed, rc = %d\n", rc);
 622                 GOTO(cleanup, rc);
 623         }
 624
 625         rc = mdc_req2lustre_md(exp, req, 0, NULL, &md);
 626         if (rc) {
 627                 CERROR("mdc_req2lustre_md() failed, rc = %d\n", rc);
 628                 GOTO(cleanup, rc);
 629         }
 630
 631         if (md.mea == NULL)
 632                 GOTO(cleanup, rc = -ENODATA);
 633
 634         rc = lmv_create_obj_from_attrs(exp, fid, md.mea);
 635         obd_free_memmd(exp, (struct lov_stripe_md **) &md.mea);
 636
 637 cleanup:
 638         if (req)
 639                 ptlrpc_req_finished(req);
 640         RETURN(rc);
 641 }
 642
 643 int lmv_create(struct obd_export *exp, struct mdc_op_data *op_data,
 644                const void *data, int datalen, int mode, __u32 uid,
 645                __u32 gid, __u64 rdev, struct ptlrpc_request **request)
 646 {
 647         struct obd_device *obd = exp->exp_obd;
 648         struct lmv_obd *lmv = &obd->u.lmv;
 649         struct mds_body *mds_body;
 650         struct lmv_obj *obj;
 651         int rc, mds;
 652         ENTRY;
 653
 654         rc = lmv_check_connect(obd);
 655         if (rc)
 656                 RETURN(rc);
 657
 658         if (!lmv->desc.ld_active_tgt_count)
 659                 RETURN(-EIO);
 660 repeat:
 661         obj = lmv_grab_obj(obd, &op_data->fid1, 0);
 662         if (obj) {
 663                 mds = raw_name2idx(obj->objcount, op_data->name,
 664                                    op_data->namelen);
 665                 op_data->fid1 = obj->objs[mds].fid;
 666                 lmv_put_obj(obj);
 667         }
 668
 669         CDEBUG(D_OTHER, "CREATE '%*s' on %lu/%lu/%lu\n",
 670                         op_data->namelen, op_data->name,
 671                         (unsigned long) op_data->fid1.mds,
 672                         (unsigned long) op_data->fid1.id,
 673                         (unsigned long) op_data->fid1.generation);
 674         rc = md_create(lmv->tgts[op_data->fid1.mds].ltd_exp, op_data, data,
 675                        datalen, mode, uid, gid, rdev, request);
 676         if (rc == 0) {
 677                 if (*request == NULL)
 678                      RETURN(rc);
 679                 mds_body = lustre_msg_buf((*request)->rq_repmsg, 0,
 680                                           sizeof(*mds_body));
 681                 LASSERT(mds_body != NULL);
 682                 CDEBUG(D_OTHER, "created. id = %lu, generation = %lu, mds = %d\n",
 683                        (unsigned long) mds_body->fid1.id,
 684                        (unsigned long) mds_body->fid1.generation,
 685                        op_data->fid1.mds);
 686                 LASSERT(mds_body->valid & OBD_MD_MDS ||
 687                         mds_body->mds == op_data->fid1.mds);
 688         } else if (rc == -ERESTART) {
 689                 /* directory got splitted. time to update local object
 690                  * and repeat the request with proper MDS */
 691                 rc = lmv_get_mea_and_update_object(exp, &op_data->fid1);
 692                 if (rc == 0) {
 693                         ptlrpc_req_finished(*request);
 694                         goto repeat;
 695                 }
 696         }
 697         RETURN(rc);
 698 }
 699
 700 int lmv_done_writing(struct obd_export *exp, struct obdo *obdo)
 701 {
 702         struct obd_device *obd = exp->exp_obd;
 703         struct lmv_obd *lmv = &obd->u.lmv;
 704         int rc;
 705         ENTRY;
 706         rc = lmv_check_connect(obd);
 707         if (rc)
 708                 RETURN(rc);
 709
 710         /* FIXME: choose right MDC here */
 711         rc = md_done_writing(lmv->tgts[0].ltd_exp, obdo);
 712         RETURN(rc);
 713 }
 714
 715 int lmv_enqueue(struct obd_export *exp, int lock_type,
 716                 struct lookup_intent *it, int lock_mode,
 717                 struct mdc_op_data *data, struct lustre_handle *lockh,
 718                 void *lmm, int lmmsize,
 719                 ldlm_completion_callback cb_completion,
 720                 ldlm_blocking_callback cb_blocking, void *cb_data)
 721 {
 722         struct obd_device *obd = exp->exp_obd;
 723         struct lmv_obd *lmv = &obd->u.lmv;
 724         struct lmv_obj *obj;
 725         int rc, mds;
 726         ENTRY;
 727
 728         rc = lmv_check_connect(obd);
 729         if (rc)
 730                 RETURN(rc);
 731
 732         if (data->namelen) {
 733                 obj = lmv_grab_obj(obd, &data->fid1, 0);
 734                 if (obj) {
 735                         /* directory is splitted. look for
 736                          * right mds for this name */
 737                         mds = raw_name2idx(obj->objcount, (char *)data->name,
 738                                            data->namelen);
 739                         data->fid1 = obj->objs[mds].fid;
 740                         lmv_put_obj(obj);
 741                 }
 742         }
 743         CDEBUG(D_OTHER, "ENQUEUE '%s' on %lu/%lu\n",
 744                LL_IT2STR(it), (unsigned long) data->fid1.id,
 745                (unsigned long) data->fid1.generation);
 746         rc = md_enqueue(lmv->tgts[data->fid1.mds].ltd_exp, lock_type, it,
 747                         lock_mode, data, lockh, lmm, lmmsize, cb_completion,
 748                         cb_blocking, cb_data);
 749
 750         RETURN(rc);
 751 }
 752
 753 int lmv_getattr_name(struct obd_export *exp, struct ll_fid *fid,
 754                          char *filename, int namelen, unsigned long valid,
 755                          unsigned int ea_size, struct ptlrpc_request **request)
 756 {
 757         struct obd_device *obd = exp->exp_obd;
 758         struct lmv_obd *lmv = &obd->u.lmv;
 759         struct ll_fid rfid = *fid;
 760         int rc, mds = fid->mds;
 761         struct mds_body *body;
 762         struct lmv_obj *obj;
 763         ENTRY;
 764         rc = lmv_check_connect(obd);
 765         if (rc)
 766                 RETURN(rc);
 767 repeat:
 768         obj = lmv_grab_obj(obd, fid, 0);
 769         if (obj) {
 770                 /* directory is splitted. look for right mds for this name */
 771                 mds = raw_name2idx(obj->objcount, filename, namelen - 1);
 772                 rfid = obj->objs[mds].fid;
 773                 lmv_put_obj(obj);
 774         }
 775         CDEBUG(D_OTHER, "getattr_name for %*s on %lu/%lu/%lu -> %lu/%lu/%lu\n",
 776                namelen, filename, (unsigned long) fid->mds,
 777                (unsigned long) fid->id, (unsigned long) fid->generation,
 778                (unsigned long) rfid.mds, (unsigned long) rfid.id,
 779                (unsigned long) rfid.generation);
 780         rc = md_getattr_name(lmv->tgts[mds].ltd_exp, &rfid, filename, namelen,
 781                                   valid, ea_size, request);
 782         if (rc == 0) {
 783                 /* this could be cross-node reference. in this case all
 784                  * we have right now is mds/ino/generation triple. we'd
 785                  * like to find other attributes */
 786                 body = lustre_msg_buf((*request)->rq_repmsg, 0, sizeof(*body));
 787                 LASSERT(body != NULL);
 788                 if (body->valid & OBD_MD_MDS) {
 789                         struct ptlrpc_request *req = NULL;
 790                         rfid = body->fid1;
 791                         CDEBUG(D_OTHER, "request attrs for %lu/%lu/%lu\n",
 792                                (unsigned long) rfid.mds,
 793                                (unsigned long) rfid.id,
 794                                (unsigned long) rfid.generation);
 795                         rc = md_getattr_name(lmv->tgts[rfid.mds].ltd_exp, &rfid,
 796                                              NULL, 1, valid, ea_size, &req);
 797                         ptlrpc_req_finished(*request);
 798                         *request = req;
 799                 }
 800         } else if (rc == -ERESTART) {
 801                 /* directory got splitted. time to update local object
 802                  * and repeat the request with proper MDS */
 803                 rc = lmv_get_mea_and_update_object(exp, &rfid);
 804                 if (rc == 0) {
 805                         ptlrpc_req_finished(*request);
 806                         goto repeat;
 807                 }
 808         }
 809         RETURN(rc);
 810 }
 811
 812
 813 /*
 814  * llite passes fid of an target inode in data->fid1 and
 815  * fid of directory in data->fid2
 816  */
 817 int lmv_link(struct obd_export *exp, struct mdc_op_data *data,
 818              struct ptlrpc_request **request)
 819 {
 820         struct obd_device *obd = exp->exp_obd;
 821         struct lmv_obd *lmv = &obd->u.lmv;
 822         struct lmv_obj *obj;
 823         int rc;
 824         ENTRY;
 825         rc = lmv_check_connect(obd);
 826         if (rc)
 827                 RETURN(rc);
 828         if (data->namelen != 0) {
 829                 /* usual link request */
 830                 obj = lmv_grab_obj(obd, &data->fid1, 0);
 831                 if (obj) {
 832                         rc = raw_name2idx(obj->objcount, data->name,
 833                                          data->namelen);
 834                         data->fid1 = obj->objs[rc].fid;
 835                         lmv_put_obj(obj);
 836                 }
 837                 CDEBUG(D_OTHER,"link %u/%u/%u:%*s to %u/%u/%u mds %d\n",
 838                        (unsigned) data->fid2.mds, (unsigned) data->fid2.id,
 839                        (unsigned) data->fid2.generation, data->namelen,
 840                        data->name, (unsigned) data->fid1.mds,
 841                        (unsigned) data->fid1.id,
 842                        (unsigned) data->fid1.generation, data->fid1.mds);
 843         } else {
 844                 /* request from MDS to acquire i_links for inode by fid1 */
 845                 CDEBUG(D_OTHER, "inc i_nlinks for %u/%u/%u\n",
 846                        (unsigned) data->fid1.mds, (unsigned) data->fid1.id,
 847                        (unsigned) data->fid1.generation);
 848         }
 849
 850         rc = md_link(lmv->tgts[data->fid1.mds].ltd_exp, data, request);
 851         RETURN(rc);
 852 }
 853
 854 int lmv_rename(struct obd_export *exp, struct mdc_op_data *data,
 855                const char *old, int oldlen, const char *new, int newlen,
 856                struct ptlrpc_request **request)
 857 {
 858         struct obd_device *obd = exp->exp_obd;
 859         struct lmv_obd *lmv = &obd->u.lmv;
 860         struct lmv_obj *obj;
 861         int rc, mds;
 862         ENTRY;
 863
 864         CDEBUG(D_OTHER, "rename %*s in %lu/%lu/%lu to %*s in %lu/%lu/%lu\n",
 865                oldlen, old, (unsigned long) data->fid1.mds,
 866                (unsigned long) data->fid1.id,
 867                (unsigned long) data->fid1.generation,
 868                newlen, new, (unsigned long) data->fid2.mds,
 869                (unsigned long) data->fid2.id,
 870                (unsigned long) data->fid2.generation);
 871         if (!fid_equal(&data->fid1, &data->fid2))
 872                 CWARN("cross-node rename %lu/%lu/%lu:%*s to %lu/%lu/%lu:%*s\n",
 873                       (unsigned long) data->fid1.mds,
 874                       (unsigned long) data->fid1.id,
 875                       (unsigned long) data->fid1.generation, oldlen, old,
 876                       (unsigned long) data->fid2.mds,
 877                       (unsigned long) data->fid2.id,
 878                       (unsigned long) data->fid2.generation, newlen, new);
 879
 880         rc = lmv_check_connect(obd);
 881         if (rc)
 882                 RETURN(rc);
 883
 884         if (oldlen == 0) {
 885                 /* MDS with old dir entry is asking another MDS
 886                  * to create name there */
 887                 CDEBUG(D_OTHER,
 888                        "create %*s(%d/%d) in %lu/%lu/%lu pointing to %lu/%lu/%lu\n",
 889                        newlen, new, oldlen, newlen,
 890                        (unsigned long) data->fid2.mds,
 891                        (unsigned long) data->fid2.id,
 892                        (unsigned long) data->fid2.generation,
 893                        (unsigned long) data->fid1.mds,
 894                        (unsigned long) data->fid1.id,
 895                        (unsigned long) data->fid1.generation);
 896                 mds = data->fid2.mds;
 897                 goto request;
 898         }
 899
 900         obj = lmv_grab_obj(obd, &data->fid1, 0);
 901         if (obj) {
 902                 /* directory is already splitted, so we have to forward
 903                  * request to the right MDS */
 904                 mds = raw_name2idx(obj->objcount, (char *)old, oldlen);
 905                 data->fid1 = obj->objs[mds].fid;
 906                 CDEBUG(D_OTHER, "forward to MDS #%u (%lu/%lu/%lu)\n", mds,
 907                        (unsigned long) obj->objs[mds].fid.mds,
 908                        (unsigned long) obj->objs[mds].fid.id,
 909                        (unsigned long) obj->objs[mds].fid.generation);
 910         }
 911         lmv_put_obj(obj);
 912
 913         obj = lmv_grab_obj(obd, &data->fid2, 0);
 914         if (obj) {
 915                 /* directory is already splitted, so we have to forward
 916                  * request to the right MDS */
 917                 mds = raw_name2idx(obj->objcount, (char *)new, newlen);
 918                 data->fid2 = obj->objs[mds].fid;
 919                 CDEBUG(D_OTHER, "forward to MDS #%u (%lu/%lu/%lu)\n", mds,
 920                        (unsigned long) obj->objs[mds].fid.mds,
 921                        (unsigned long) obj->objs[mds].fid.id,
 922                        (unsigned long) obj->objs[mds].fid.generation);
 923         }
 924         lmv_put_obj(obj);
 925
 926         mds = data->fid1.mds;
 927
 928 request:
 929         rc = md_rename(lmv->tgts[mds].ltd_exp, data, old, oldlen,
 930                        new, newlen, request);
 931         RETURN(rc);
 932 }
 933
 934 int lmv_setattr(struct obd_export *exp, struct mdc_op_data *data,
 935                 struct iattr *iattr, void *ea, int ealen, void *ea2, int ea2len,
 936                 struct ptlrpc_request **request)
 937 {
 938         struct obd_device *obd = exp->exp_obd;
 939         struct lmv_obd *lmv = &obd->u.lmv;
 940         int rc = 0, i = data->fid1.mds;
 941         struct ptlrpc_request *req;
 942         struct mds_body *mds_body;
 943         struct lmv_obj *obj;
 944         ENTRY;
 945
 946         rc = lmv_check_connect(obd);
 947         if (rc)
 948                 RETURN(rc);
 949
 950         obj = lmv_grab_obj(obd, &data->fid1, 0);
 951         CDEBUG(D_OTHER, "SETATTR for %lu/%lu/%lu, valid 0x%x%s\n",
 952                (unsigned long) data->fid1.mds,
 953                (unsigned long) data->fid1.id,
 954                (unsigned long) data->fid1.generation, iattr->ia_valid,
 955                obj ? ", splitted" : "");
 956         if (obj) {
 957                 for (i = 0; i < obj->objcount; i++) {
 958                         data->fid1 = obj->objs[i].fid;
 959                         rc = md_setattr(lmv->tgts[i].ltd_exp, data, iattr, ea,
 960                                         ealen, ea2, ea2len, &req);
 961                         LASSERT(rc == 0);
 962                         if (fid_equal(&obj->fid, &obj->objs[i].fid)) {
 963                                 /* this is master object and this request
 964                                  * should be returned back to llite */
 965                                 *request = req;
 966                         } else {
 967                                 ptlrpc_req_finished(req);
 968                         }
 969                 }
 970                 lmv_put_obj(obj);
 971         } else {
 972                 LASSERT(data->fid1.mds < lmv->desc.ld_tgt_count);
 973                 rc = md_setattr(lmv->tgts[i].ltd_exp, data, iattr, ea, ealen,
 974                                 ea2, ea2len, request);
 975                 if (rc == 0) {
 976                         mds_body = lustre_msg_buf((*request)->rq_repmsg, 0,
 977                                         sizeof(*mds_body));
 978                         LASSERT(mds_body != NULL);
 979                         LASSERT(mds_body->mds == i);
 980                 }
 981         }
 982         RETURN(rc);
 983 }
 984
 985 int lmv_sync(struct obd_export *exp, struct ll_fid *fid,
 986              struct ptlrpc_request **request)
 987 {
 988         struct obd_device *obd = exp->exp_obd;
 989         struct lmv_obd *lmv = &obd->u.lmv;
 990         int rc;
 991         ENTRY;
 992
 993         rc = lmv_check_connect(obd);
 994         if (rc)
 995                 RETURN(rc);
 996
 997         rc = md_sync(lmv->tgts[0].ltd_exp, fid, request);
 998         RETURN(rc);
 999 }
1000
1001 int lmv_dirobj_blocking_ast(struct ldlm_lock *lock,
1002                             struct ldlm_lock_desc *desc, void *data, int flag)
1003 {
1004         struct lustre_handle lockh;
1005         struct lmv_obj *obj;
1006         int rc;
1007         ENTRY;
1008
1009         switch (flag) {
1010         case LDLM_CB_BLOCKING:
1011                 ldlm_lock2handle(lock, &lockh);
1012                 rc = ldlm_cli_cancel(&lockh);
1013                 if (rc < 0) {
1014                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
1015                         RETURN(rc);
1016                 }
1017                 break;
1018         case LDLM_CB_CANCELING:
1019                 /* time to drop cached attrs for dirobj */
1020                 obj = lock->l_ast_data;
1021                 if (!obj)
1022                         break;
1023
1024                 CDEBUG(D_OTHER, "cancel %s on %lu/%lu, master %lu/%lu/%lu\n",
1025                        lock->l_resource->lr_name.name[3] == 1 ?
1026                                 "LOOKUP" : "UPDATE",
1027                        (unsigned long) lock->l_resource->lr_name.name[0],
1028                        (unsigned long) lock->l_resource->lr_name.name[1],
1029                        (unsigned long) obj->fid.mds,
1030                        (unsigned long) obj->fid.id,
1031                        (unsigned long) obj->fid.generation);
1032                 break;
1033         default:
1034                 LBUG();
1035         }
1036         RETURN(0);
1037 }
1038
1039 void lmv_remove_dots(struct page *page)
1040 {
1041         char *kaddr = page_address(page);
1042         unsigned limit = PAGE_CACHE_SIZE;
1043         unsigned offs, rec_len;
1044         struct ext2_dir_entry_2 *p;
1045
1046         for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
1047                 p = (struct ext2_dir_entry_2 *)(kaddr + offs);
1048                 rec_len = le16_to_cpu(p->rec_len);
1049
1050                 if ((p->name_len == 1 && p->name[0] == '.') ||
1051                     (p->name_len == 2 && p->name[0] == '.' && p->name[1] == '.'))
1052                         p->inode = 0;
1053         }
1054 }
1055
1056 int lmv_readpage(struct obd_export *exp, struct ll_fid *mdc_fid,
1057                  __u64 offset, struct page *page,
1058                  struct ptlrpc_request **request)
1059 {
1060         struct obd_device *obd = exp->exp_obd;
1061         struct lmv_obd *lmv = &obd->u.lmv;
1062         struct ll_fid rfid = *mdc_fid;
1063         struct lmv_obj *obj;
1064         int rc, i;
1065         ENTRY;
1066
1067         rc = lmv_check_connect(obd);
1068         if (rc)
1069                 RETURN(rc);
1070
1071         LASSERT(mdc_fid->mds < lmv->desc.ld_tgt_count);
1072         CDEBUG(D_OTHER, "READPAGE at %llu from %lu/%lu/%lu\n",
1073                offset, (unsigned long) rfid.mds,
1074                (unsigned long) rfid.id,
1075                (unsigned long) rfid.generation);
1076
1077         obj = lmv_grab_obj(obd, mdc_fid, 0);
1078         if (obj) {
1079                 /* find dirobj containing page with requested offset */
1080                 /* FIXME: what about protecting cached attrs here? */
1081                 for (i = 0; i < obj->objcount; i++) {
1082                         if (offset < obj->objs[i].size)
1083                                 break;
1084                         offset -= obj->objs[i].size;
1085                 }
1086                 rfid = obj->objs[i].fid;
1087                 CDEBUG(D_OTHER, "forward to %lu/%lu/%lu with offset %lu\n",
1088                        (unsigned long) rfid.mds,
1089                        (unsigned long) rfid.id,
1090                        (unsigned long) rfid.generation,
1091                        (unsigned long) offset);
1092         }
1093         rc = md_readpage(lmv->tgts[rfid.mds].ltd_exp, &rfid, offset, page, request);
1094         if (rc == 0 && !fid_equal(&rfid, mdc_fid)) {
1095                 /* this page isn't from master object. to avoid
1096                  * ./.. duplication in directory, we have to remove them
1097                  * from all slave objects */
1098                 lmv_remove_dots(page);
1099         }
1100
1101         lmv_put_obj(obj);
1102
1103         RETURN(rc);
1104 }
1105
1106 int lmv_unlink(struct obd_export *exp, struct mdc_op_data *data,
1107                struct ptlrpc_request **request)
1108 {
1109         struct obd_device *obd = exp->exp_obd;
1110         struct lmv_obd *lmv = &obd->u.lmv;
1111         int rc, i = 0;
1112         ENTRY;
1113
1114         rc = lmv_check_connect(obd);
1115         if (rc)
1116                 RETURN(rc);
1117
1118         if (data->namelen != 0) {
1119                 struct lmv_obj *obj;
1120                 obj = lmv_grab_obj(obd, &data->fid1, 0);
1121                 if (obj) {
1122                         i = raw_name2idx(obj->objcount, data->name,
1123                                          data->namelen);
1124                         data->fid1 = obj->objs[i].fid;
1125                         lmv_put_obj(obj);
1126                 }
1127                 CDEBUG(D_OTHER, "unlink '%*s' in %lu/%lu/%lu -> %u\n",
1128                        data->namelen, data->name,
1129                        (unsigned long) data->fid1.mds,
1130                        (unsigned long) data->fid1.id,
1131                        (unsigned long) data->fid1.generation, i);
1132         } else {
1133                 CDEBUG(D_OTHER, "drop i_nlink on %lu/%lu/%lu\n",
1134                        (unsigned long) data->fid1.mds,
1135                        (unsigned long) data->fid1.id,
1136                        (unsigned long) data->fid1.generation);
1137         }
1138         rc = md_unlink(lmv->tgts[data->fid1.mds].ltd_exp, data, request);
1139         RETURN(rc);
1140 }
1141
1142 struct obd_device *lmv_get_real_obd(struct obd_export *exp,
1143                                     char *name, int len)
1144 {
1145         struct obd_device *obd = exp->exp_obd;
1146         struct lmv_obd *lmv = &obd->u.lmv;
1147         int rc;
1148         ENTRY;
1149
1150         rc = lmv_check_connect(obd);
1151         if (rc)
1152                 RETURN(ERR_PTR(rc));
1153         obd = lmv->tgts[0].ltd_exp->exp_obd;
1154         EXIT;
1155         return obd;
1156 }
1157
1158 int lmv_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
1159 {
1160         struct obd_device *obd = exp->exp_obd;
1161         struct lmv_obd *lmv = &obd->u.lmv;
1162         int i, rc = 0, change = 0;
1163         ENTRY;
1164
1165         if (lmv->max_easize < easize) {
1166                 lmv->max_easize = easize;
1167                 change = 1;
1168         }
1169         if (lmv->max_cookiesize < cookiesize) {
1170                 lmv->max_cookiesize = cookiesize;
1171                 change = 1;
1172         }
1173         if (change == 0)
1174                 RETURN(0);
1175
1176         if (lmv->connected == 0)
1177                 RETURN(0);
1178
1179         /* FIXME: error handling? */
1180         for (i = 0; i < lmv->desc.ld_tgt_count; i++)
1181                 rc = obd_init_ea_size(lmv->tgts[i].ltd_exp, easize, cookiesize);
1182         RETURN(rc);
1183 }
1184
1185 int lmv_obd_create_single(struct obd_export *exp, struct obdo *oa,
1186                           struct lov_stripe_md **ea, struct obd_trans_info *oti)
1187 {
1188         struct obd_device *obd = exp->exp_obd;
1189         struct lmv_obd *lmv = &obd->u.lmv;
1190         struct lov_stripe_md obj_md;
1191         struct lov_stripe_md *obj_mdp = &obj_md;
1192         int rc = 0;
1193         ENTRY;
1194
1195         rc = lmv_check_connect(obd);
1196         if (rc)
1197                 RETURN(rc);
1198
1199         LASSERT(ea == NULL);
1200         LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
1201
1202         rc = obd_create(lmv->tgts[oa->o_mds].ltd_exp, oa, &obj_mdp, oti);
1203         LASSERT(rc == 0);
1204
1205         RETURN(rc);
1206 }
1207
1208 /*
1209  * to be called from MDS only
1210  */
1211 int lmv_obd_create(struct obd_export *exp, struct obdo *oa,
1212                struct lov_stripe_md **ea, struct obd_trans_info *oti)
1213 {
1214         struct obd_device *obd = exp->exp_obd;
1215         struct lmv_obd *lmv = &obd->u.lmv;
1216         struct mea *mea;
1217         int i, c, rc = 0;
1218         struct ll_fid mfid;
1219         ENTRY;
1220
1221         rc = lmv_check_connect(obd);
1222         if (rc)
1223                 RETURN(rc);
1224
1225         LASSERT(oa != NULL);
1226
1227         if (ea == NULL) {
1228                 rc = lmv_obd_create_single(exp, oa, NULL, oti);
1229                 RETURN(rc);
1230         }
1231
1232         if (*ea == NULL) {
1233                 rc = obd_alloc_diskmd(exp, (struct lov_mds_md **)ea);
1234                 LASSERT(*ea != NULL);
1235         }
1236
1237         mea = (struct mea *)*ea;
1238         mfid.id = oa->o_id;
1239         mfid.generation = oa->o_generation;
1240         rc = 0;
1241         if (!mea->mea_count || mea->mea_count > lmv->desc.ld_tgt_count)
1242                 mea->mea_count = lmv->desc.ld_tgt_count;
1243
1244         mea->mea_master = -1;
1245
1246         /* FIXME: error handling? */
1247         for (i = 0, c = 0; c < mea->mea_count &&
1248                 i < lmv->desc.ld_tgt_count; i++) {
1249                 struct lov_stripe_md obj_md;
1250                 struct lov_stripe_md *obj_mdp = &obj_md;
1251
1252                 if (lmv->tgts[i].ltd_exp == NULL) {
1253                         /* this is master MDS */
1254                         mea->mea_fids[c].id = mfid.id;
1255                         mea->mea_fids[c].generation = mfid.generation;
1256                         mea->mea_fids[c].mds = i;
1257                         mea->mea_master = i;
1258                         c++;
1259                         continue;
1260                 }
1261
1262                 /* "Master" MDS should always be part of stripped dir, so
1263                    scan for it */
1264                 if (mea->mea_master == -1 && c == mea->mea_count - 1)
1265                         continue;
1266
1267                 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLTYPE | OBD_MD_FLMODE
1268                                 | OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLID;
1269
1270                 rc = obd_create(lmv->tgts[c].ltd_exp, oa, &obj_mdp, oti);
1271                 /* FIXME: error handling here */
1272                 LASSERT(rc == 0);
1273
1274                 mea->mea_fids[c].id = oa->o_id;
1275                 mea->mea_fids[c].generation = oa->o_generation;
1276                 mea->mea_fids[c].mds = i;
1277                 c++;
1278                 CDEBUG(D_OTHER, "dirobj at mds %d: "LPU64"/%u\n",
1279                        i, oa->o_id, oa->o_generation);
1280         }
1281         LASSERT(c == mea->mea_count);
1282         CDEBUG(D_OTHER, "%d dirobjects created\n", (int) mea->mea_count);
1283
1284         RETURN(rc);
1285 }
1286
1287 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
1288                            void *key, __u32 *vallen, void *val)
1289 {
1290         struct obd_device *obd;
1291         struct lmv_obd *lmv;
1292         ENTRY;
1293
1294         obd = class_exp2obd(exp);
1295         if (obd == NULL) {
1296                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1297                        exp->exp_handle.h_cookie);
1298                 RETURN(-EINVAL);
1299         }
1300
1301         lmv = &obd->u.lmv;
1302         if (keylen == 6 && memcmp(key, "mdsize", 6) == 0) {
1303                 __u32 *mdsize = val;
1304                 *vallen = sizeof(__u32);
1305                 *mdsize = sizeof(struct ll_fid) * lmv->desc.ld_tgt_count
1306                                 + sizeof(struct mea);
1307                 RETURN(0);
1308         } else if (keylen == 6 && memcmp(key, "mdsnum", 6) == 0) {
1309                 struct obd_uuid *cluuid = &lmv->cluuid;
1310                 struct lmv_tgt_desc *tgts;
1311                 __u32 *mdsnum = val;
1312                 int i;
1313
1314                 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
1315                         if (obd_uuid_equals(&tgts->uuid, cluuid)) {
1316                                 *vallen = sizeof(__u32);
1317                                 *mdsnum = i;
1318                                 RETURN(0);
1319                         }
1320                 }
1321                 LASSERT(0);
1322         }
1323
1324         CDEBUG(D_IOCTL, "invalid key\n");
1325         RETURN(-EINVAL);
1326 }
1327
1328 int lmv_set_info(struct obd_export *exp, obd_count keylen,
1329                  void *key, obd_count vallen, void *val)
1330 {
1331         struct obd_device *obd;
1332         struct lmv_obd *lmv;
1333         ENTRY;
1334
1335         obd = class_exp2obd(exp);
1336         if (obd == NULL) {
1337                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1338                        exp->exp_handle.h_cookie);
1339                 RETURN(-EINVAL);
1340         }
1341         lmv = &obd->u.lmv;
1342
1343         if (keylen >= strlen("client") && strcmp(key, "client") == 0) {
1344                 struct lmv_tgt_desc *tgts;
1345                 int i, rc;
1346
1347                 rc = lmv_check_connect(obd);
1348                 if (rc)
1349                         RETURN(rc);
1350
1351                 for (i = 0, tgts = lmv->tgts;
1352                         i < lmv->desc.ld_tgt_count; i++, tgts++) {
1353                         rc = obd_set_info(tgts->ltd_exp, keylen, key, vallen, val);
1354                         if (rc)
1355                                 RETURN(rc);
1356                 }
1357                 RETURN(0);
1358         } else if (keylen >= strlen("inter_mds") && strcmp(key, "inter_mds") == 0) {
1359                 lmv->server_timeout = 1;
1360                 lmv_set_timeouts(obd);
1361                 RETURN(0);
1362         }
1363
1364         RETURN(-EINVAL);
1365 }
1366
1367 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
1368                struct lov_stripe_md *lsm)
1369 {
1370         struct obd_device *obd = class_exp2obd(exp);
1371         struct lmv_obd *lmv = &obd->u.lmv;
1372         int mea_size;
1373         ENTRY;
1374
1375         mea_size = sizeof(struct ll_fid) *
1376                 lmv->desc.ld_tgt_count + sizeof(struct mea);
1377         if (!lmmp)
1378                 RETURN(mea_size);
1379
1380         if (*lmmp && !lsm) {
1381                 OBD_FREE(*lmmp, mea_size);
1382                 *lmmp = NULL;
1383                 RETURN(0);
1384         }
1385
1386         if (!*lmmp) {
1387                 OBD_ALLOC(*lmmp, mea_size);
1388                 if (!*lmmp)
1389                         RETURN(-ENOMEM);
1390         }
1391
1392         if (!lsm)
1393                 RETURN(mea_size);
1394
1395 #warning "MEA packing/convertation must be here! -bzzz"
1396         memcpy(*lmmp, lsm, mea_size);
1397         RETURN(mea_size);
1398 }
1399
1400 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **mem_tgt,
1401                         struct lov_mds_md *disk_src, int mdsize)
1402 {
1403         struct obd_device *obd = class_exp2obd(exp);
1404         struct lmv_obd *lmv = &obd->u.lmv;
1405         struct mea **tmea = (struct mea **) mem_tgt;
1406         struct mea *mea = (void *) disk_src;
1407         int mea_size;
1408         ENTRY;
1409
1410         mea_size = sizeof(struct ll_fid) *
1411                 lmv->desc.ld_tgt_count + sizeof(struct mea);
1412         if (mem_tgt == NULL)
1413                 return mea_size;
1414
1415         if (*mem_tgt != NULL && disk_src == NULL) {
1416                 OBD_FREE(*tmea, mea_size);
1417                 RETURN(0);
1418         }
1419
1420         LASSERT(mea_size == mdsize);
1421
1422         OBD_ALLOC(*tmea, mea_size);
1423         /* FIXME: error handling here */
1424         LASSERT(*tmea != NULL);
1425
1426         if (!disk_src)
1427                 RETURN(mea_size);
1428
1429 #warning "MEA unpacking/convertation must be here! -bzzz"
1430         memcpy(*tmea, mea, mdsize);
1431         RETURN(mea_size);
1432 }
1433
1434 int lmv_brw(int rw, struct obd_export *exp, struct obdo *oa,
1435                 struct lov_stripe_md *ea, obd_count oa_bufs,
1436                 struct brw_page *pgarr, struct obd_trans_info *oti)
1437 {
1438         struct obd_device *obd = exp->exp_obd;
1439         struct lmv_obd *lmv = &obd->u.lmv;
1440         struct mea *mea = (struct mea *) ea;
1441         int err;
1442
1443         LASSERT(oa != NULL);
1444         LASSERT(ea != NULL);
1445         LASSERT(pgarr != NULL);
1446         LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
1447
1448         oa->o_gr = mea->mea_fids[oa->o_mds].generation;
1449         oa->o_id = mea->mea_fids[oa->o_mds].id;
1450         oa->o_valid =  OBD_MD_FLID | OBD_MD_FLGROUP;
1451         err = obd_brw(rw, lmv->tgts[oa->o_mds].ltd_exp, oa,
1452                       NULL, oa_bufs, pgarr, oti);
1453         RETURN(err);
1454 }
1455
1456 struct obd_ops lmv_obd_ops = {
1457         .o_owner                = THIS_MODULE,
1458         .o_attach               = lmv_attach,
1459         .o_detach               = lmv_detach,
1460         .o_setup                = lmv_setup,
1461         .o_cleanup              = lmv_cleanup,
1462         .o_connect              = lmv_connect,
1463         .o_disconnect           = lmv_disconnect,
1464         .o_statfs               = lmv_statfs,
1465         .o_get_info             = lmv_get_info,
1466         .o_set_info             = lmv_set_info,
1467         .o_create               = lmv_obd_create,
1468         .o_packmd               = lmv_packmd,
1469         .o_unpackmd             = lmv_unpackmd,
1470         .o_brw                  = lmv_brw,
1471         .o_init_ea_size         = lmv_init_ea_size,
1472         .o_notify               = lmv_notify,
1473 };
1474
1475 struct md_ops lmv_md_ops = {
1476         .m_getstatus            = lmv_getstatus,
1477         .m_getattr              = lmv_getattr,
1478         .m_change_cbdata        = lmv_change_cbdata,
1479         .m_change_cbdata_name   = lmv_change_cbdata_name,
1480         .m_close                = lmv_close,
1481         .m_create               = lmv_create,
1482         .m_done_writing         = lmv_done_writing,
1483         .m_enqueue              = lmv_enqueue,
1484         .m_getattr_name         = lmv_getattr_name,
1485         .m_intent_lock          = lmv_intent_lock,
1486         .m_link                 = lmv_link,
1487         .m_rename               = lmv_rename,
1488         .m_setattr              = lmv_setattr,
1489         .m_sync                 = lmv_sync,
1490         .m_readpage             = lmv_readpage,
1491         .m_unlink               = lmv_unlink,
1492         .m_get_real_obd         = lmv_get_real_obd,
1493         .m_valid_attrs          = lmv_valid_attrs,
1494 };
1495
1496 int __init lmv_init(void)
1497 {
1498         struct lprocfs_static_vars lvars;
1499         int rc;
1500
1501         lprocfs_init_vars(lmv, &lvars);
1502         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
1503                                  lvars.module_vars, OBD_LMV_DEVICENAME);
1504         RETURN(rc);
1505 }
1506
1507 #ifdef __KERNEL__
1508 static void lmv_exit(void)
1509 {
1510         class_unregister_type(OBD_LMV_DEVICENAME);
1511 }
1512
1513 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1514 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
1515 MODULE_LICENSE("GPL");
1516
1517 module_init(lmv_init);
1518 module_exit(lmv_exit);
1519 #endif