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 int lmv_attach(struct obd_device *dev, obd_count len, void *data)
  53 {
  54         struct lprocfs_static_vars lvars;
  55         int rc;
  56         ENTRY;
  57
  58         lprocfs_init_vars(lmv, &lvars);
  59         rc = lprocfs_obd_attach(dev, lvars.obd_vars);
  60         if (rc == 0) {
  61 #ifdef __KERNEL__
  62                 struct proc_dir_entry *entry;
  63
  64                 entry = create_proc_entry("target_obd", 0444, dev->obd_proc_entry);
  65                 if (entry == NULL)
  66                         RETURN(-ENOMEM);
  67                 /* entry->proc_fops = &lmv_proc_target_fops; */
  68                 entry->data = dev;
  69 #endif
  70        }
  71         RETURN (rc);
  72 }
  73
  74 int lmv_detach(struct obd_device *dev)
  75 {
  76         return lprocfs_obd_detach(dev);
  77 }
  78
  79 static int lmv_connect_fake(struct lustre_handle *conn,
  80                             struct obd_device *obd,
  81                             struct obd_uuid *cluuid)
  82 {
  83         struct lmv_obd *lmv = &obd->u.lmv;
  84         struct obd_export *exp;
  85         int rc;
  86         ENTRY;
  87
  88         rc = class_connect(conn, obd, cluuid);
  89         if (rc) {
  90                 CERROR("class_connection() returned %d\n", rc);
  91                 RETURN(rc);
  92         }
  93
  94         exp = class_conn2export(conn);
  95         /* We don't want to actually do the underlying connections more than
  96          * once, so keep track. */
  97         lmv->refcount++;
  98         if (lmv->refcount > 1) {
  99                 class_export_put(exp);
 100                 RETURN(0);
 101         }
 102
 103         lmv->cluuid = *cluuid;
 104         lmv->connected = 0;
 105         lmv->exp = exp;
 106
 107         RETURN(0);
 108 }
 109
 110 void lmv_set_timeouts(struct obd_device *obd)
 111 {
 112         struct lmv_tgt_desc *tgts;
 113         struct lmv_obd *lmv;
 114         int i;
 115
 116         lmv = &obd->u.lmv;
 117         if (lmv->server_timeout == 0)
 118                 return;
 119
 120         if (lmv->connected == 0)
 121                 return;
 122
 123         for (i = 0, tgts = lmv->tgts; i < lmv->count; i++, tgts++) {
 124                 if (tgts->exp == NULL)
 125                         continue;
 126                 obd_set_info(tgts->exp, strlen("inter_mds"),
 127                              "inter_mds", 0, NULL);
 128         }
 129 }
 130
 131 int lmv_connect(struct obd_device *obd)
 132 {
 133         struct lmv_obd *lmv = &obd->u.lmv;
 134         struct obd_uuid *cluuid;
 135         struct lmv_tgt_desc *tgts;
 136         struct obd_export *exp;
 137         int rc, i;
 138         ENTRY;
 139
 140         if (lmv->connected)
 141                 RETURN(0);
 142
 143         lmv->connected = 1;
 144         cluuid = &lmv->cluuid;
 145         exp = lmv->exp;
 146         CDEBUG(D_OTHER, "time to connect %s to %s\n",
 147                         cluuid->uuid, obd->obd_name);
 148
 149         for (i = 0, tgts = lmv->tgts; i < lmv->count; i++, tgts++) {
 150                 struct obd_device *tgt_obd;
 151                 struct obd_uuid lmv_osc_uuid = { "LMV_OSC_UUID" };
 152                 struct lustre_handle conn = {0, };
 153
 154                 LASSERT(tgts != NULL);
 155
 156                 tgt_obd = class_find_client_obd(&tgts->uuid, LUSTRE_MDC_NAME,
 157                                                 &obd->obd_uuid);
 158                 if (!tgt_obd) {
 159                         CERROR("Target %s not attached\n", tgts->uuid.uuid);
 160                         GOTO(out_disc, rc = -EINVAL);
 161                 }
 162
 163                 /* for MDS: don't connect to yourself */
 164                 if (obd_uuid_equals(&tgts->uuid, cluuid)) {
 165                         CDEBUG(D_OTHER, "don't connect back to %s\n",
 166                                cluuid->uuid);
 167                         tgts->exp = NULL;
 168                         continue;
 169                 }
 170
 171                 CDEBUG(D_OTHER, "connect to %s(%s) - %s, %s FOR %s\n",
 172                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 173                         tgts->uuid.uuid, obd->obd_uuid.uuid,
 174                         cluuid->uuid);
 175
 176                 if (!tgt_obd->obd_set_up) {
 177                         CERROR("Target %s not set up\n", tgts->uuid.uuid);
 178                         GOTO(out_disc, rc = -EINVAL);
 179                 }
 180
 181                 rc = obd_connect(&conn, tgt_obd, &lmv_osc_uuid);
 182                 if (rc) {
 183                         CERROR("Target %s connect error %d\n",
 184                                 tgts->uuid.uuid, rc);
 185                         GOTO(out_disc, rc);
 186                 }
 187                 tgts->exp = class_conn2export(&conn);
 188
 189                 obd_init_ea_size(tgts->exp, lmv->max_easize,
 190                                         lmv->max_cookiesize);
 191
 192                 rc = obd_register_observer(tgt_obd, obd);
 193                 if (rc) {
 194                         CERROR("Target %s register_observer error %d\n",
 195                                tgts->uuid.uuid, rc);
 196                         obd_disconnect(tgts->exp, 0);
 197                         GOTO(out_disc, rc);
 198                 }
 199
 200                 CDEBUG(D_OTHER, "connected to %s(%s) successfully (%d)\n",
 201                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 202                         atomic_read(&obd->obd_refcount));
 203         }
 204
 205         lmv_set_timeouts(obd);
 206
 207         class_export_put(exp);
 208         RETURN (0);
 209
 210  out_disc:
 211         /* FIXME: cleanup here */
 212         class_disconnect(exp, 0);
 213         RETURN (rc);
 214 }
 215
 216 static int lmv_disconnect(struct obd_export *exp, int flags)
 217 {
 218         struct obd_device *obd = class_exp2obd(exp);
 219         struct lmv_obd *lmv = &obd->u.lmv;
 220         int rc, i;
 221         ENTRY;
 222
 223         if (!lmv->tgts)
 224                 goto out_local;
 225
 226         /* Only disconnect the underlying layers on the final disconnect. */
 227         lmv->refcount--;
 228         if (lmv->refcount != 0)
 229                 goto out_local;
 230
 231         for (i = 0; i < lmv->count; i++) {
 232                 if (lmv->tgts[i].exp == NULL)
 233                         continue;
 234
 235                 if (obd->obd_no_recov) {
 236                         /* Pass it on to our clients.
 237                          * XXX This should be an argument to disconnect,
 238                          * XXX not a back-door flag on the OBD.  Ah well.
 239                          */
 240                         struct obd_device *mdc_obd;
 241                         mdc_obd = class_exp2obd(lmv->tgts[i].exp);
 242                         if (mdc_obd)
 243                                 mdc_obd->obd_no_recov = 1;
 244                 }
 245
 246                 CDEBUG(D_OTHER, "disconnected from %s(%s) successfully\n",
 247                         lmv->tgts[i].exp->exp_obd->obd_name,
 248                         lmv->tgts[i].exp->exp_obd->obd_uuid.uuid);
 249
 250                 obd_register_observer(lmv->tgts[i].exp->exp_obd, NULL);
 251
 252                 rc = obd_disconnect(lmv->tgts[i].exp, flags);
 253                 lmv->tgts[i].exp = NULL;
 254         }
 255
 256  out_local:
 257         /* FIXME: cleanup here */
 258         if (!lmv->connected)
 259                 class_export_put(exp);
 260         rc = class_disconnect(exp, 0);
 261         RETURN(rc);
 262 }
 263
 264 static int lmv_setup(struct obd_device *obd, obd_count len, void *buf)
 265 {
 266         struct lustre_cfg *lcfg = buf;
 267         struct lmv_desc *desc;
 268         struct lmv_obd *lmv = &obd->u.lmv;
 269         struct obd_uuid *uuids;
 270         struct lmv_tgt_desc *tgts;
 271         int i;
 272         int count;
 273         int rc = 0;
 274         ENTRY;
 275
 276         if (lcfg->lcfg_inllen1 < 1) {
 277                 CERROR("LMV setup requires a descriptor\n");
 278                 RETURN(-EINVAL);
 279         }
 280
 281         if (lcfg->lcfg_inllen2 < 1) {
 282                 CERROR("LMV setup requires an OST UUID list\n");
 283                 RETURN(-EINVAL);
 284         }
 285
 286         desc = (struct lmv_desc *)lcfg->lcfg_inlbuf1;
 287         if (sizeof(*desc) > lcfg->lcfg_inllen1) {
 288                 CERROR("descriptor size wrong: %d > %d\n",
 289                        (int)sizeof(*desc), lcfg->lcfg_inllen1);
 290                 RETURN(-EINVAL);
 291         }
 292
 293         count = desc->ld_count;
 294         uuids = (struct obd_uuid *)lcfg->lcfg_inlbuf2;
 295         if (sizeof(*uuids) * count != lcfg->lcfg_inllen2) {
 296                 CERROR("UUID array size wrong: %u * %u != %u\n",
 297                        sizeof(*uuids), count, lcfg->lcfg_inllen2);
 298                 RETURN(-EINVAL);
 299         }
 300
 301         lmv->bufsize = sizeof(struct lmv_tgt_desc) * count;
 302         OBD_ALLOC(lmv->tgts, lmv->bufsize);
 303         if (lmv->tgts == NULL) {
 304                 CERROR("Out of memory\n");
 305                 RETURN(-EINVAL);
 306         }
 307
 308         for (i = 0, tgts = lmv->tgts; i < count; i++, tgts++) {
 309                 tgts->uuid = uuids[i];
 310                 lmv->count++;
 311         }
 312
 313         lmv->max_easize = sizeof(struct ll_fid) * lmv->count
 314                                         + sizeof(struct mea);
 315         lmv->max_cookiesize = 0;
 316
 317         RETURN(rc);
 318 }
 319
 320 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 321                       unsigned long max_age)
 322 {
 323         struct lmv_obd *lmv = &obd->u.lmv;
 324         struct obd_statfs temp;
 325         int rc = 0, i;
 326         ENTRY;
 327         lmv_connect(obd);
 328         for (i = 0; i < lmv->count; i++) {
 329                 rc = obd_statfs(lmv->tgts[i].exp->exp_obd, &temp, max_age);
 330                 if (rc) {
 331                         CERROR("can't stat MDS #%d (%s)\n", i,
 332                                lmv->tgts[i].exp->exp_obd->obd_name);
 333                         RETURN(rc);
 334                 }
 335                 if (i == 0) {
 336                         memcpy(osfs, &temp, sizeof(temp));
 337                 } else {
 338                         osfs->os_bavail += temp.os_bavail;
 339                         osfs->os_blocks += temp.os_blocks;
 340                         osfs->os_ffree += temp.os_ffree;
 341                         osfs->os_files += temp.os_files;
 342                 }
 343         }
 344         RETURN(rc);
 345 }
 346
 347 static int lmv_cleanup(struct obd_device *obd, int flags)
 348 {
 349         struct lmv_obd *lmv = &obd->u.lmv;
 350         ENTRY;
 351         lmv_cleanup_objs(obd);
 352         OBD_FREE(lmv->tgts, lmv->bufsize);
 353         RETURN(0);
 354 }
 355
 356 static int lmv_getstatus(struct obd_export *exp, struct ll_fid *fid)
 357 {
 358         struct obd_device *obd = exp->exp_obd;
 359         struct lmv_obd *lmv = &obd->u.lmv;
 360         int rc;
 361         ENTRY;
 362         lmv_connect(obd);
 363         rc = md_getstatus(lmv->tgts[0].exp, fid);
 364         fid->mds = 0;
 365         RETURN(rc);
 366 }
 367
 368 static int lmv_getattr(struct obd_export *exp, struct ll_fid *fid,
 369                 unsigned long valid, unsigned int ea_size,
 370                 struct ptlrpc_request **request)
 371 {
 372         struct obd_device *obd = exp->exp_obd;
 373         struct lmv_obd *lmv = &obd->u.lmv;
 374         int rc, i = fid->mds;
 375         struct lmv_obj *obj;
 376         ENTRY;
 377         lmv_connect(obd);
 378         obj = lmv_grab_obj(obd, fid, 0);
 379         CDEBUG(D_OTHER, "GETATTR for %lu/%lu/%lu %s\n",
 380                (unsigned long) fid->mds,
 381                (unsigned long) fid->id,
 382                (unsigned long) fid->generation,
 383                obj ? "(splitted)" : "");
 384
 385         LASSERT(fid->mds < lmv->count);
 386         rc = md_getattr(lmv->tgts[i].exp, fid,
 387                              valid, ea_size, request);
 388         if (rc == 0 && obj) {
 389                 /* we have to loop over dirobjs here and gather attrs
 390                  * for all the slaves */
 391 #warning "attrs gathering here"
 392         }
 393         lmv_put_obj(obj);
 394         RETURN(rc);
 395 }
 396
 397 static int lmv_change_cbdata(struct obd_export *exp,
 398                                  struct ll_fid *fid,
 399                                  ldlm_iterator_t it, void *data)
 400 {
 401         struct obd_device *obd = exp->exp_obd;
 402         struct lmv_obd *lmv = &obd->u.lmv;
 403         int rc = 0;
 404         ENTRY;
 405         lmv_connect(obd);
 406         CDEBUG(D_OTHER, "CBDATA for %lu/%lu/%lu\n",
 407                (unsigned long) fid->mds,
 408                (unsigned long) fid->id,
 409                (unsigned long) fid->generation);
 410         LASSERT(fid->mds < lmv->count);
 411         rc = md_change_cbdata(lmv->tgts[fid->mds].exp, fid, it, data);
 412         RETURN(rc);
 413 }
 414
 415 static int lmv_change_cbdata_name(struct obd_export *exp, struct ll_fid *pfid,
 416                                   char *name, int len, struct ll_fid *cfid,
 417                                   ldlm_iterator_t it, void *data)
 418 {
 419         struct obd_device *obd = exp->exp_obd;
 420         struct lmv_obd *lmv = &obd->u.lmv;
 421         struct lmv_obj *obj;
 422         int rc = 0, mds;
 423         ENTRY;
 424         lmv_connect(obd);
 425         LASSERT(pfid->mds < lmv->count);
 426         LASSERT(cfid->mds < lmv->count);
 427         CDEBUG(D_OTHER, "CBDATA for %lu/%lu/%lu:%*s -> %lu/%lu/%lu\n",
 428                (unsigned long) pfid->mds, (unsigned long) pfid->id,
 429                (unsigned long) pfid->generation, len, name,
 430                (unsigned long) cfid->mds, (unsigned long) cfid->id,
 431                (unsigned long) cfid->generation);
 432
 433         /* this is default mds for directory name belongs to */
 434         mds = pfid->mds;
 435         obj = lmv_grab_obj(obd, pfid, 0);
 436         if (obj) {
 437                 /* directory is splitted. look for right mds for this name */
 438                 mds = raw_name2idx(obj->objcount, name, len);
 439                 lmv_put_obj(obj);
 440         }
 441         rc = md_change_cbdata(lmv->tgts[mds].exp, cfid, it, data);
 442         RETURN(rc);
 443 }
 444
 445 static int lmv_valid_attrs(struct obd_export *exp, struct ll_fid *fid)
 446 {
 447         struct obd_device *obd = exp->exp_obd;
 448         struct lmv_obd *lmv = &obd->u.lmv;
 449         int rc = 0;
 450         ENTRY;
 451         lmv_connect(obd);
 452         CDEBUG(D_OTHER, "validate %lu/%lu/%lu\n",
 453                (unsigned long) fid->mds,
 454                (unsigned long) fid->id,
 455                (unsigned long) fid->generation);
 456         LASSERT(fid->mds < lmv->count);
 457         rc = md_valid_attrs(lmv->tgts[fid->mds].exp, fid);
 458         RETURN(rc);
 459 }
 460
 461 int lmv_close(struct obd_export *exp, struct obdo *obdo,
 462                   struct obd_client_handle *och,
 463                   struct ptlrpc_request **request)
 464 {
 465         struct obd_device *obd = exp->exp_obd;
 466         struct lmv_obd *lmv = &obd->u.lmv;
 467         int rc, i = obdo->o_mds;
 468         ENTRY;
 469         lmv_connect(obd);
 470         LASSERT(i < lmv->count);
 471         CDEBUG(D_OTHER, "CLOSE %lu/%lu/%lu\n", (unsigned long) obdo->o_mds,
 472                (unsigned long) obdo->o_id, (unsigned long) obdo->o_generation);
 473         rc = md_close(lmv->tgts[i].exp, obdo, och, request);
 474         RETURN(rc);
 475 }
 476
 477 int lmv_get_mea_and_update_object(struct obd_export *exp, struct ll_fid *fid)
 478 {
 479         struct obd_device *obd = exp->exp_obd;
 480         struct lmv_obd *lmv = &obd->u.lmv;
 481         struct ptlrpc_request *req = NULL;
 482         struct lustre_md md;
 483         unsigned long valid;
 484         int mealen, rc;
 485
 486         md.mea = NULL;
 487         mealen = MEA_SIZE_LMV(lmv);
 488
 489         valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 490
 491         /* time to update mea of parent fid */
 492         rc = md_getattr(lmv->tgts[fid->mds].exp, fid,
 493                         valid, mealen, &req);
 494         if (rc) {
 495                 CERROR("md_getattr() failed, rc = %d\n", rc);
 496                 GOTO(cleanup, rc);
 497         }
 498
 499         rc = mdc_req2lustre_md(exp, req, 0, NULL, &md);
 500         if (rc) {
 501                 CERROR("mdc_req2lustre_md() failed, rc = %d\n", rc);
 502                 GOTO(cleanup, rc);
 503         }
 504
 505         if (md.mea == NULL)
 506                 GOTO(cleanup, rc = -ENODATA);
 507
 508         rc = lmv_create_obj_from_attrs(exp, fid, md.mea);
 509         obd_free_memmd(exp, (struct lov_stripe_md **) &md.mea);
 510
 511 cleanup:
 512         if (req)
 513                 ptlrpc_req_finished(req);
 514         RETURN(rc);
 515 }
 516
 517 int lmv_create(struct obd_export *exp, struct mdc_op_data *op_data,
 518                const void *data, int datalen, int mode, __u32 uid,
 519                __u32 gid, __u64 rdev, struct ptlrpc_request **request)
 520 {
 521         struct obd_device *obd = exp->exp_obd;
 522         struct lmv_obd *lmv = &obd->u.lmv;
 523         struct mds_body *mds_body;
 524         struct lmv_obj *obj;
 525         int rc, mds;
 526         ENTRY;
 527
 528         lmv_connect(obd);
 529 repeat:
 530         obj = lmv_grab_obj(obd, &op_data->fid1, 0);
 531         if (obj) {
 532                 mds = raw_name2idx(obj->objcount, op_data->name,
 533                                         op_data->namelen);
 534                 op_data->fid1 = obj->objs[mds].fid;
 535                 lmv_put_obj(obj);
 536         }
 537
 538         CDEBUG(D_OTHER, "CREATE '%*s' on %lu/%lu/%lu\n",
 539                         op_data->namelen, op_data->name,
 540                         (unsigned long) op_data->fid1.mds,
 541                         (unsigned long) op_data->fid1.id,
 542                         (unsigned long) op_data->fid1.generation);
 543         rc = md_create(lmv->tgts[op_data->fid1.mds].exp, op_data, data,
 544                        datalen, mode, uid, gid, rdev, request);
 545         if (rc == 0) {
 546                 if (*request == NULL)
 547                      RETURN(rc);
 548                 mds_body = lustre_msg_buf((*request)->rq_repmsg, 0,
 549                                           sizeof(*mds_body));
 550                 LASSERT(mds_body != NULL);
 551                 CDEBUG(D_OTHER, "created. id = %lu, generation = %lu, mds = %d\n",
 552                        (unsigned long) mds_body->fid1.id,
 553                        (unsigned long) mds_body->fid1.generation,
 554                        op_data->fid1.mds);
 555                 LASSERT(mds_body->valid & OBD_MD_MDS ||
 556                                 mds_body->mds == op_data->fid1.mds);
 557         } else if (rc == -ERESTART) {
 558                 /* directory got splitted. time to update local object
 559                  * and repeat the request with proper MDS */
 560                 rc = lmv_get_mea_and_update_object(exp, &op_data->fid1);
 561                 if (rc == 0) {
 562                         ptlrpc_req_finished(*request);
 563                         goto repeat;
 564                 }
 565         }
 566         RETURN(rc);
 567 }
 568
 569 int lmv_done_writing(struct obd_export *exp, struct obdo *obdo)
 570 {
 571         struct obd_device *obd = exp->exp_obd;
 572         struct lmv_obd *lmv = &obd->u.lmv;
 573         int rc;
 574         ENTRY;
 575         lmv_connect(obd);
 576         /* FIXME: choose right MDC here */
 577         rc = md_done_writing(lmv->tgts[0].exp, obdo);
 578         RETURN(rc);
 579 }
 580
 581 int lmv_enqueue(struct obd_export *exp, int lock_type,
 582                 struct lookup_intent *it, int lock_mode,
 583                 struct mdc_op_data *data, struct lustre_handle *lockh,
 584                 void *lmm, int lmmsize,
 585                 ldlm_completion_callback cb_completion,
 586                 ldlm_blocking_callback cb_blocking, void *cb_data)
 587 {
 588         struct obd_device *obd = exp->exp_obd;
 589         struct lmv_obd *lmv = &obd->u.lmv;
 590         struct lmv_obj *obj;
 591         int rc, mds;
 592         ENTRY;
 593         lmv_connect(obd);
 594         if (data->namelen) {
 595                 obj = lmv_grab_obj(obd, &data->fid1, 0);
 596                 if (obj) {
 597                         /* directory is splitted. look for
 598                          * right mds for this name */
 599                         mds = raw_name2idx(obj->objcount, (char *)data->name,
 600                                            data->namelen);
 601                         data->fid1 = obj->objs[mds].fid;
 602                         lmv_put_obj(obj);
 603                 }
 604         }
 605         CDEBUG(D_OTHER, "ENQUEUE '%s' on %lu/%lu\n",
 606                LL_IT2STR(it), (unsigned long) data->fid1.id,
 607                (unsigned long) data->fid1.generation);
 608         rc = md_enqueue(lmv->tgts[data->fid1.mds].exp, lock_type, it,
 609                         lock_mode, data, lockh, lmm, lmmsize, cb_completion,
 610                         cb_blocking, cb_data);
 611
 612         RETURN(rc);
 613 }
 614
 615 int lmv_getattr_name(struct obd_export *exp, struct ll_fid *fid,
 616                          char *filename, int namelen, unsigned long valid,
 617                          unsigned int ea_size, struct ptlrpc_request **request)
 618 {
 619         struct obd_device *obd = exp->exp_obd;
 620         struct lmv_obd *lmv = &obd->u.lmv;
 621         struct ll_fid rfid = *fid;
 622         int rc, mds = fid->mds;
 623         struct mds_body *body;
 624         struct lmv_obj *obj;
 625         ENTRY;
 626         lmv_connect(obd);
 627 repeat:
 628         obj = lmv_grab_obj(obd, fid, 0);
 629         if (obj) {
 630                 /* directory is splitted. look for right mds for this name */
 631                 mds = raw_name2idx(obj->objcount, filename, namelen - 1);
 632                 rfid = obj->objs[mds].fid;
 633                 lmv_put_obj(obj);
 634         }
 635         CDEBUG(D_OTHER, "getattr_name for %*s on %lu/%lu/%lu -> %lu/%lu/%lu\n",
 636                namelen, filename, (unsigned long) fid->mds,
 637                (unsigned long) fid->id, (unsigned long) fid->generation,
 638                (unsigned long) rfid.mds, (unsigned long) rfid.id,
 639                (unsigned long) rfid.generation);
 640         rc = md_getattr_name(lmv->tgts[mds].exp, &rfid, filename, namelen,
 641                                   valid, ea_size, request);
 642         if (rc == 0) {
 643                 /* this could be cross-node reference. in this case all
 644                  * we have right now is mds/ino/generation triple. we'd
 645                  * like to find other attributes */
 646                 body = lustre_msg_buf((*request)->rq_repmsg, 0, sizeof(*body));
 647                 LASSERT(body != NULL);
 648                 if (body->valid & OBD_MD_MDS) {
 649                         struct ptlrpc_request *req = NULL;
 650                         rfid = body->fid1;
 651                         CDEBUG(D_OTHER, "request attrs for %lu/%lu/%lu\n",
 652                                (unsigned long) rfid.mds,
 653                                (unsigned long) rfid.id,
 654                                (unsigned long) rfid.generation);
 655                         rc = md_getattr_name(lmv->tgts[rfid.mds].exp, &rfid,
 656                                              NULL, 1, valid, ea_size, &req);
 657                         ptlrpc_req_finished(*request);
 658                         *request = req;
 659                 }
 660         } else if (rc == -ERESTART) {
 661                 /* directory got splitted. time to update local object
 662                  * and repeat the request with proper MDS */
 663                 rc = lmv_get_mea_and_update_object(exp, &rfid);
 664                 if (rc == 0) {
 665                         ptlrpc_req_finished(*request);
 666                         goto repeat;
 667                 }
 668         }
 669         RETURN(rc);
 670 }
 671
 672
 673 /*
 674  * llite passes fid of an target inode in data->fid1 and
 675  * fid of directory in data->fid2
 676  */
 677 int lmv_link(struct obd_export *exp, struct mdc_op_data *data,
 678              struct ptlrpc_request **request)
 679 {
 680         struct obd_device *obd = exp->exp_obd;
 681         struct lmv_obd *lmv = &obd->u.lmv;
 682         struct lmv_obj *obj;
 683         int rc;
 684         ENTRY;
 685         lmv_connect(obd);
 686         if (data->namelen != 0) {
 687                 /* usual link request */
 688                 obj = lmv_grab_obj(obd, &data->fid1, 0);
 689                 if (obj) {
 690                         rc = raw_name2idx(obj->objcount, data->name,
 691                                          data->namelen);
 692                         data->fid1 = obj->objs[rc].fid;
 693                         lmv_put_obj(obj);
 694                 }
 695                 CDEBUG(D_OTHER,"link %u/%u/%u:%*s to %u/%u/%u mds %d\n",
 696                        (unsigned) data->fid2.mds, (unsigned) data->fid2.id,
 697                        (unsigned) data->fid2.generation, data->namelen,
 698                        data->name, (unsigned) data->fid1.mds,
 699                        (unsigned) data->fid1.id,
 700                        (unsigned) data->fid1.generation, data->fid1.mds);
 701         } else {
 702                 /* request from MDS to acquire i_links for inode by fid1 */
 703                 CDEBUG(D_OTHER, "inc i_nlinks for %u/%u/%u\n",
 704                        (unsigned) data->fid1.mds, (unsigned) data->fid1.id,
 705                        (unsigned) data->fid1.generation);
 706         }
 707
 708         rc = md_link(lmv->tgts[data->fid1.mds].exp, data, request);
 709         RETURN(rc);
 710 }
 711
 712 int lmv_rename(struct obd_export *exp, struct mdc_op_data *data,
 713                const char *old, int oldlen, const char *new, int newlen,
 714                struct ptlrpc_request **request)
 715 {
 716         struct obd_device *obd = exp->exp_obd;
 717         struct lmv_obd *lmv = &obd->u.lmv;
 718         struct lmv_obj *obj;
 719         int rc, mds;
 720         ENTRY;
 721
 722         CDEBUG(D_OTHER, "rename %*s in %lu/%lu/%lu to %*s in %lu/%lu/%lu\n",
 723                oldlen, old, (unsigned long) data->fid1.mds,
 724                (unsigned long) data->fid1.id,
 725                (unsigned long) data->fid1.generation,
 726                newlen, new, (unsigned long) data->fid2.mds,
 727                (unsigned long) data->fid2.id,
 728                (unsigned long) data->fid2.generation);
 729         if (!fid_equal(&data->fid1, &data->fid2))
 730                 CWARN("cross-node rename %lu/%lu/%lu:%*s to %lu/%lu/%lu:%*s\n",
 731                       (unsigned long) data->fid1.mds,
 732                       (unsigned long) data->fid1.id,
 733                       (unsigned long) data->fid1.generation, oldlen, old,
 734                       (unsigned long) data->fid2.mds,
 735                       (unsigned long) data->fid2.id,
 736                       (unsigned long) data->fid2.generation, newlen, new);
 737
 738         lmv_connect(obd);
 739
 740         if (oldlen == 0) {
 741                 /* MDS with old dir entry is asking another MDS
 742                  * to create name there */
 743                 CDEBUG(D_OTHER,
 744                        "create %*s(%d/%d) in %lu/%lu/%lu pointing to %lu/%lu/%lu\n",
 745                        newlen, new, oldlen, newlen,
 746                        (unsigned long) data->fid2.mds,
 747                        (unsigned long) data->fid2.id,
 748                        (unsigned long) data->fid2.generation,
 749                        (unsigned long) data->fid1.mds,
 750                        (unsigned long) data->fid1.id,
 751                        (unsigned long) data->fid1.generation);
 752                 mds = data->fid2.mds;
 753                 goto request;
 754         }
 755
 756         obj = lmv_grab_obj(obd, &data->fid1, 0);
 757         if (obj) {
 758                 /* directory is already splitted, so we have to forward
 759                  * request to the right MDS */
 760                 mds = raw_name2idx(obj->objcount, (char *)old, oldlen);
 761                 data->fid1 = obj->objs[mds].fid;
 762                 CDEBUG(D_OTHER, "forward to MDS #%u (%lu/%lu/%lu)\n", mds,
 763                        (unsigned long) obj->objs[mds].fid.mds,
 764                        (unsigned long) obj->objs[mds].fid.id,
 765                        (unsigned long) obj->objs[mds].fid.generation);
 766         }
 767         lmv_put_obj(obj);
 768
 769         obj = lmv_grab_obj(obd, &data->fid2, 0);
 770         if (obj) {
 771                 /* directory is already splitted, so we have to forward
 772                  * request to the right MDS */
 773                 mds = raw_name2idx(obj->objcount, (char *)new, newlen);
 774                 data->fid2 = obj->objs[mds].fid;
 775                 CDEBUG(D_OTHER, "forward to MDS #%u (%lu/%lu/%lu)\n", mds,
 776                        (unsigned long) obj->objs[mds].fid.mds,
 777                        (unsigned long) obj->objs[mds].fid.id,
 778                        (unsigned long) obj->objs[mds].fid.generation);
 779         }
 780         lmv_put_obj(obj);
 781
 782         mds = data->fid1.mds;
 783
 784 request:
 785         rc = md_rename(lmv->tgts[mds].exp, data, old, oldlen,
 786                             new, newlen, request);
 787         RETURN(rc);
 788 }
 789
 790 int lmv_setattr(struct obd_export *exp, struct mdc_op_data *data,
 791                 struct iattr *iattr, void *ea, int ealen, void *ea2, int ea2len,
 792                 struct ptlrpc_request **request)
 793 {
 794         struct obd_device *obd = exp->exp_obd;
 795         struct lmv_obd *lmv = &obd->u.lmv;
 796         int rc = 0, i = data->fid1.mds;
 797         struct ptlrpc_request *req;
 798         struct mds_body *mds_body;
 799         struct lmv_obj *obj;
 800         ENTRY;
 801         lmv_connect(obd);
 802         obj = lmv_grab_obj(obd, &data->fid1, 0);
 803         CDEBUG(D_OTHER, "SETATTR for %lu/%lu/%lu, valid 0x%x%s\n",
 804                (unsigned long) data->fid1.mds,
 805                (unsigned long) data->fid1.id,
 806                (unsigned long) data->fid1.generation, iattr->ia_valid,
 807                obj ? ", splitted" : "");
 808         if (obj) {
 809                 for (i = 0; i < obj->objcount; i++) {
 810                         data->fid1 = obj->objs[i].fid;
 811                         rc = md_setattr(lmv->tgts[i].exp, data, iattr, ea,
 812                                         ealen, ea2, ea2len, &req);
 813                         LASSERT(rc == 0);
 814                         if (fid_equal(&obj->fid, &obj->objs[i].fid)) {
 815                                 /* this is master object and this request
 816                                  * should be returned back to llite */
 817                                 *request = req;
 818                         } else {
 819                                 ptlrpc_req_finished(req);
 820                         }
 821                 }
 822                 lmv_put_obj(obj);
 823         } else {
 824                 LASSERT(data->fid1.mds < lmv->count);
 825                 rc = md_setattr(lmv->tgts[i].exp, data, iattr, ea, ealen,
 826                                 ea2, ea2len, request);
 827                 if (rc == 0) {
 828                         mds_body = lustre_msg_buf((*request)->rq_repmsg, 0,
 829                                         sizeof(*mds_body));
 830                         LASSERT(mds_body != NULL);
 831                         LASSERT(mds_body->mds == i);
 832                 }
 833         }
 834         RETURN(rc);
 835 }
 836
 837 int lmv_sync(struct obd_export *exp, struct ll_fid *fid,
 838              struct ptlrpc_request **request)
 839 {
 840         struct obd_device *obd = exp->exp_obd;
 841         struct lmv_obd *lmv = &obd->u.lmv;
 842         int rc;
 843         ENTRY;
 844         lmv_connect(obd);
 845         rc = md_sync(lmv->tgts[0].exp, fid, request);
 846         RETURN(rc);
 847 }
 848
 849 int lmv_dirobj_blocking_ast(struct ldlm_lock *lock,
 850                             struct ldlm_lock_desc *desc, void *data, int flag)
 851 {
 852         struct lustre_handle lockh;
 853         struct lmv_obj *obj;
 854         int rc;
 855         ENTRY;
 856
 857         switch (flag) {
 858         case LDLM_CB_BLOCKING:
 859                 ldlm_lock2handle(lock, &lockh);
 860                 rc = ldlm_cli_cancel(&lockh);
 861                 if (rc < 0) {
 862                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 863                         RETURN(rc);
 864                 }
 865                 break;
 866         case LDLM_CB_CANCELING:
 867                 /* time to drop cached attrs for dirobj */
 868                 obj = lock->l_ast_data;
 869                 if (!obj)
 870                         break;
 871
 872                 CDEBUG(D_OTHER, "cancel %s on %lu/%lu, master %lu/%lu/%lu\n",
 873                        lock->l_resource->lr_name.name[3] == 1 ?
 874                                 "LOOKUP" : "UPDATE",
 875                        (unsigned long) lock->l_resource->lr_name.name[0],
 876                        (unsigned long) lock->l_resource->lr_name.name[1],
 877                        (unsigned long) obj->fid.mds,
 878                        (unsigned long) obj->fid.id,
 879                        (unsigned long) obj->fid.generation);
 880                 break;
 881         default:
 882                 LBUG();
 883         }
 884         RETURN(0);
 885 }
 886
 887 void lmv_remove_dots(struct page *page)
 888 {
 889         char *kaddr = page_address(page);
 890         unsigned limit = PAGE_CACHE_SIZE;
 891         unsigned offs, rec_len;
 892         struct ext2_dir_entry_2 *p;
 893
 894         for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
 895                 p = (struct ext2_dir_entry_2 *)(kaddr + offs);
 896                 rec_len = le16_to_cpu(p->rec_len);
 897
 898                 if ((p->name_len == 1 && p->name[0] == '.') ||
 899                     (p->name_len == 2 && p->name[0] == '.' && p->name[1] == '.'))
 900                         p->inode = 0;
 901         }
 902 }
 903
 904 int lmv_readpage(struct obd_export *exp, struct ll_fid *mdc_fid,
 905                  __u64 offset, struct page *page,
 906                  struct ptlrpc_request **request)
 907 {
 908         struct obd_device *obd = exp->exp_obd;
 909         struct lmv_obd *lmv = &obd->u.lmv;
 910         struct ll_fid rfid = *mdc_fid;
 911         struct lmv_obj *obj;
 912         int rc, i;
 913         ENTRY;
 914         lmv_connect(obd);
 915
 916         LASSERT(mdc_fid->mds < lmv->count);
 917         CDEBUG(D_OTHER, "READPAGE at %llu from %lu/%lu/%lu\n",
 918                offset, (unsigned long) rfid.mds,
 919                (unsigned long) rfid.id,
 920                (unsigned long) rfid.generation);
 921
 922         obj = lmv_grab_obj(obd, mdc_fid, 0);
 923         if (obj) {
 924                 /* find dirobj containing page with requested offset */
 925                 /* FIXME: what about protecting cached attrs here? */
 926                 for (i = 0; i < obj->objcount; i++) {
 927                         if (offset < obj->objs[i].size)
 928                                 break;
 929                         offset -= obj->objs[i].size;
 930                 }
 931                 rfid = obj->objs[i].fid;
 932                 CDEBUG(D_OTHER, "forward to %lu/%lu/%lu with offset %lu\n",
 933                        (unsigned long) rfid.mds,
 934                        (unsigned long) rfid.id,
 935                        (unsigned long) rfid.generation,
 936                        (unsigned long) offset);
 937         }
 938         rc = md_readpage(lmv->tgts[rfid.mds].exp, &rfid, offset, page, request);
 939         if (rc == 0 && !fid_equal(&rfid, mdc_fid)) {
 940                 /* this page isn't from master object. to avoid
 941                  * ./.. duplication in directory, we have to remove them
 942                  * from all slave objects */
 943                 lmv_remove_dots(page);
 944         }
 945
 946         lmv_put_obj(obj);
 947
 948         RETURN(rc);
 949 }
 950
 951 int lmv_unlink(struct obd_export *exp, struct mdc_op_data *data,
 952                struct ptlrpc_request **request)
 953 {
 954         struct obd_device *obd = exp->exp_obd;
 955         struct lmv_obd *lmv = &obd->u.lmv;
 956         int rc, i = 0;
 957         ENTRY;
 958         lmv_connect(obd);
 959         if (data->namelen != 0) {
 960                 struct lmv_obj *obj;
 961                 obj = lmv_grab_obj(obd, &data->fid1, 0);
 962                 if (obj) {
 963                         i = raw_name2idx(obj->objcount, data->name,
 964                                          data->namelen);
 965                         data->fid1 = obj->objs[i].fid;
 966                         lmv_put_obj(obj);
 967                 }
 968                 CDEBUG(D_OTHER, "unlink '%*s' in %lu/%lu/%lu -> %u\n",
 969                        data->namelen, data->name,
 970                        (unsigned long) data->fid1.mds,
 971                        (unsigned long) data->fid1.id,
 972                        (unsigned long) data->fid1.generation, i);
 973         } else {
 974                 CDEBUG(D_OTHER, "drop i_nlink on %lu/%lu/%lu\n",
 975                        (unsigned long) data->fid1.mds,
 976                        (unsigned long) data->fid1.id,
 977                        (unsigned long) data->fid1.generation);
 978         }
 979         rc = md_unlink(lmv->tgts[data->fid1.mds].exp, data, request);
 980         RETURN(rc);
 981 }
 982
 983 struct obd_device *lmv_get_real_obd(struct obd_export *exp,
 984                                     char *name, int len)
 985 {
 986         struct obd_device *obd = exp->exp_obd;
 987         struct lmv_obd *lmv = &obd->u.lmv;
 988         ENTRY;
 989         lmv_connect(obd);
 990         obd = lmv->tgts[0].exp->exp_obd;
 991         EXIT;
 992         return obd;
 993 }
 994
 995 int lmv_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
 996 {
 997         struct obd_device *obd = exp->exp_obd;
 998         struct lmv_obd *lmv = &obd->u.lmv;
 999         int i, rc = 0, change = 0;
1000         ENTRY;
1001
1002         if (lmv->max_easize < easize) {
1003                 lmv->max_easize = easize;
1004                 change = 1;
1005         }
1006         if (lmv->max_cookiesize < cookiesize) {
1007                 lmv->max_cookiesize = cookiesize;
1008                 change = 1;
1009         }
1010         if (change == 0)
1011                 RETURN(0);
1012
1013         if (lmv->connected == 0)
1014                 RETURN(0);
1015
1016         /* FIXME: error handling? */
1017         for (i = 0; i < lmv->count; i++)
1018                 rc = obd_init_ea_size(lmv->tgts[i].exp, easize, cookiesize);
1019         RETURN(rc);
1020 }
1021
1022 int lmv_obd_create_single(struct obd_export *exp, struct obdo *oa,
1023                           struct lov_stripe_md **ea, struct obd_trans_info *oti)
1024 {
1025         struct obd_device *obd = exp->exp_obd;
1026         struct lmv_obd *lmv = &obd->u.lmv;
1027         struct lov_stripe_md obj_md;
1028         struct lov_stripe_md *obj_mdp = &obj_md;
1029         int rc = 0;
1030         ENTRY;
1031         lmv_connect(obd);
1032
1033         LASSERT(ea == NULL);
1034         LASSERT(oa->o_mds < lmv->count);
1035
1036         rc = obd_create(lmv->tgts[oa->o_mds].exp, oa, &obj_mdp, oti);
1037         LASSERT(rc == 0);
1038
1039         RETURN(rc);
1040 }
1041
1042 /*
1043  * to be called from MDS only
1044  */
1045 int lmv_obd_create(struct obd_export *exp, struct obdo *oa,
1046                struct lov_stripe_md **ea, struct obd_trans_info *oti)
1047 {
1048         struct obd_device *obd = exp->exp_obd;
1049         struct lmv_obd *lmv = &obd->u.lmv;
1050         struct mea *mea;
1051         int i, c, rc = 0;
1052         struct ll_fid mfid;
1053         ENTRY;
1054         lmv_connect(obd);
1055
1056         LASSERT(oa != NULL);
1057
1058         if (ea == NULL) {
1059                 rc = lmv_obd_create_single(exp, oa, NULL, oti);
1060                 RETURN(rc);
1061         }
1062
1063         if (*ea == NULL) {
1064                 rc = obd_alloc_diskmd(exp, (struct lov_mds_md **)ea);
1065                 LASSERT(*ea != NULL);
1066         }
1067
1068         mea = (struct mea *)*ea;
1069         mfid.id = oa->o_id;
1070         mfid.generation = oa->o_generation;
1071         rc = 0;
1072         if (!mea->mea_count || mea->mea_count > lmv->count)
1073                 mea->mea_count = lmv->count;
1074
1075         mea->mea_master = -1;
1076
1077         /* FIXME: error handling? */
1078         for (i = 0, c = 0; c < mea->mea_count && i < lmv->count; i++) {
1079                 struct lov_stripe_md obj_md;
1080                 struct lov_stripe_md *obj_mdp = &obj_md;
1081
1082                 if (lmv->tgts[i].exp == NULL) {
1083                         /* this is master MDS */
1084                         mea->mea_fids[c].id = mfid.id;
1085                         mea->mea_fids[c].generation = mfid.generation;
1086                         mea->mea_fids[c].mds = i;
1087                         mea->mea_master = i;
1088                         c++;
1089                         continue;
1090                 }
1091
1092                 /* "Master" MDS should always be part of stripped dir, so
1093                    scan for it */
1094                 if (mea->mea_master == -1 && c == mea->mea_count - 1)
1095                         continue;
1096
1097                 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLTYPE | OBD_MD_FLMODE
1098                                 | OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLID;
1099
1100                 rc = obd_create(lmv->tgts[c].exp, oa, &obj_mdp, oti);
1101                 /* FIXME: error handling here */
1102                 LASSERT(rc == 0);
1103
1104                 mea->mea_fids[c].id = oa->o_id;
1105                 mea->mea_fids[c].generation = oa->o_generation;
1106                 mea->mea_fids[c].mds = i;
1107                 c++;
1108                 CDEBUG(D_OTHER, "dirobj at mds %d: "LPU64"/%u\n",
1109                        i, oa->o_id, oa->o_generation);
1110         }
1111         LASSERT(c == mea->mea_count);
1112         CDEBUG(D_OTHER, "%d dirobjects created\n", (int) mea->mea_count);
1113
1114         RETURN(rc);
1115 }
1116
1117 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
1118                            void *key, __u32 *vallen, void *val)
1119 {
1120         struct obd_device *obd;
1121         struct lmv_obd *lmv;
1122         ENTRY;
1123
1124         obd = class_exp2obd(exp);
1125         if (obd == NULL) {
1126                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1127                        exp->exp_handle.h_cookie);
1128                 RETURN(-EINVAL);
1129         }
1130
1131         lmv = &obd->u.lmv;
1132         if (keylen == 6 && memcmp(key, "mdsize", 6) == 0) {
1133                 __u32 *mdsize = val;
1134                 *vallen = sizeof(__u32);
1135                 *mdsize = sizeof(struct ll_fid) * lmv->count
1136                                 + sizeof(struct mea);
1137                 RETURN(0);
1138         } else if (keylen == 6 && memcmp(key, "mdsnum", 6) == 0) {
1139                 struct obd_uuid *cluuid = &lmv->cluuid;
1140                 struct lmv_tgt_desc *tgts;
1141                 __u32 *mdsnum = val;
1142                 int i;
1143
1144                 for (i = 0, tgts = lmv->tgts; i < lmv->count; i++, tgts++) {
1145                         if (obd_uuid_equals(&tgts->uuid, cluuid)) {
1146                                 *vallen = sizeof(__u32);
1147                                 *mdsnum = i;
1148                                 RETURN(0);
1149                         }
1150                 }
1151                 LASSERT(0);
1152         }
1153
1154         CDEBUG(D_IOCTL, "invalid key\n");
1155         RETURN(-EINVAL);
1156 }
1157
1158 int lmv_set_info(struct obd_export *exp, obd_count keylen,
1159                  void *key, obd_count vallen, void *val)
1160 {
1161         struct obd_device *obd;
1162         struct lmv_obd *lmv;
1163         ENTRY;
1164
1165         obd = class_exp2obd(exp);
1166         if (obd == NULL) {
1167                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1168                        exp->exp_handle.h_cookie);
1169                 RETURN(-EINVAL);
1170         }
1171         lmv = &obd->u.lmv;
1172
1173         if (keylen >= strlen("client") && strcmp(key, "client") == 0) {
1174                 struct lmv_tgt_desc *tgts;
1175                 int i, rc;
1176
1177                 lmv_connect(obd);
1178                 for (i = 0, tgts = lmv->tgts; i < lmv->count; i++, tgts++) {
1179                         rc = obd_set_info(tgts->exp, keylen, key, vallen, val);
1180                         if (rc)
1181                                 RETURN(rc);
1182                 }
1183                 RETURN(0);
1184         } else if (keylen >= strlen("inter_mds") && strcmp(key, "inter_mds") == 0) {
1185                 lmv->server_timeout = 1;
1186                 lmv_set_timeouts(obd);
1187                 RETURN(0);
1188         }
1189
1190         RETURN(-EINVAL);
1191 }
1192
1193 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
1194                struct lov_stripe_md *lsm)
1195 {
1196         struct obd_device *obd = class_exp2obd(exp);
1197         struct lmv_obd *lmv = &obd->u.lmv;
1198         int mea_size;
1199         ENTRY;
1200
1201         mea_size = sizeof(struct ll_fid) * lmv->count + sizeof(struct mea);
1202         if (!lmmp)
1203                 RETURN(mea_size);
1204
1205         if (*lmmp && !lsm) {
1206                 OBD_FREE(*lmmp, mea_size);
1207                 *lmmp = NULL;
1208                 RETURN(0);
1209         }
1210
1211         if (!*lmmp) {
1212                 OBD_ALLOC(*lmmp, mea_size);
1213                 if (!*lmmp)
1214                         RETURN(-ENOMEM);
1215         }
1216
1217         if (!lsm)
1218                 RETURN(mea_size);
1219
1220 #warning "MEA packing/convertation must be here! -bzzz"
1221         memcpy(*lmmp, lsm, mea_size);
1222         RETURN(mea_size);
1223 }
1224
1225 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **mem_tgt,
1226                         struct lov_mds_md *disk_src, int mdsize)
1227 {
1228         struct obd_device *obd = class_exp2obd(exp);
1229         struct lmv_obd *lmv = &obd->u.lmv;
1230         struct mea **tmea = (struct mea **) mem_tgt;
1231         struct mea *mea = (void *) disk_src;
1232         int mea_size;
1233         ENTRY;
1234
1235         mea_size = sizeof(struct ll_fid) * lmv->count + sizeof(struct mea);
1236         if (mem_tgt == NULL)
1237                 return mea_size;
1238
1239         if (*mem_tgt != NULL && disk_src == NULL) {
1240                 OBD_FREE(*tmea, mea_size);
1241                 RETURN(0);
1242         }
1243
1244         LASSERT(mea_size == mdsize);
1245
1246         OBD_ALLOC(*tmea, mea_size);
1247         /* FIXME: error handling here */
1248         LASSERT(*tmea != NULL);
1249
1250         if (!disk_src)
1251                 RETURN(mea_size);
1252
1253 #warning "MEA unpacking/convertation must be here! -bzzz"
1254         memcpy(*tmea, mea, mdsize);
1255         RETURN(mea_size);
1256 }
1257
1258 int lmv_brw(int rw, struct obd_export *exp, struct obdo *oa,
1259                 struct lov_stripe_md *ea, obd_count oa_bufs,
1260                 struct brw_page *pgarr, struct obd_trans_info *oti)
1261 {
1262         struct obd_device *obd = exp->exp_obd;
1263         struct lmv_obd *lmv = &obd->u.lmv;
1264         struct mea *mea = (struct mea *) ea;
1265         int err;
1266
1267         LASSERT(oa != NULL);
1268         LASSERT(ea != NULL);
1269         LASSERT(pgarr != NULL);
1270         LASSERT(oa->o_mds < lmv->count);
1271
1272         oa->o_gr = mea->mea_fids[oa->o_mds].generation;
1273         oa->o_id = mea->mea_fids[oa->o_mds].id;
1274         oa->o_valid =  OBD_MD_FLID | OBD_MD_FLGROUP;
1275         err = obd_brw(rw, lmv->tgts[oa->o_mds].exp, oa,
1276                         NULL, oa_bufs, pgarr, oti);
1277         RETURN(err);
1278 }
1279
1280 struct obd_ops lmv_obd_ops = {
1281         o_owner:                THIS_MODULE,
1282         o_attach:               lmv_attach,
1283         o_detach:               lmv_detach,
1284         o_setup:                lmv_setup,
1285         o_cleanup:              lmv_cleanup,
1286         o_connect:              lmv_connect_fake,
1287         o_disconnect:           lmv_disconnect,
1288         o_statfs:               lmv_statfs,
1289         o_get_info:             lmv_get_info,
1290         o_set_info:             lmv_set_info,
1291         o_create:               lmv_obd_create,
1292         o_packmd:               lmv_packmd,
1293         o_unpackmd:             lmv_unpackmd,
1294         o_brw:                  lmv_brw,
1295         o_init_ea_size:         lmv_init_ea_size,
1296 };
1297
1298 struct md_ops lmv_md_ops = {
1299         m_getstatus:            lmv_getstatus,
1300         m_getattr:              lmv_getattr,
1301         m_change_cbdata:        lmv_change_cbdata,
1302         m_change_cbdata_name:   lmv_change_cbdata_name,
1303         m_close:                lmv_close,
1304         m_create:               lmv_create,
1305         m_done_writing:         lmv_done_writing,
1306         m_enqueue:              lmv_enqueue,
1307         m_getattr_name:         lmv_getattr_name,
1308         m_intent_lock:          lmv_intent_lock,
1309         m_link:                 lmv_link,
1310         m_rename:               lmv_rename,
1311         m_setattr:              lmv_setattr,
1312         m_sync:                 lmv_sync,
1313         m_readpage:             lmv_readpage,
1314         m_unlink:               lmv_unlink,
1315         m_get_real_obd:         lmv_get_real_obd,
1316         m_valid_attrs:          lmv_valid_attrs,
1317 };
1318
1319 int __init lmv_init(void)
1320 {
1321         struct lprocfs_static_vars lvars;
1322         int rc;
1323
1324         lprocfs_init_vars(lmv, &lvars);
1325         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
1326                                  lvars.module_vars, OBD_LMV_DEVICENAME);
1327         RETURN(rc);
1328 }
1329
1330 #ifdef __KERNEL__
1331 static void lmv_exit(void)
1332 {
1333         class_unregister_type(OBD_LMV_DEVICENAME);
1334 }
1335
1336 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1337 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
1338 MODULE_LICENSE("GPL");
1339
1340 module_init(lmv_init);
1341 module_exit(lmv_exit);
1342 #endif