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 #else
  34 #include <liblustre.h>
  35 #endif
  36
  37 #include <linux/obd_support.h>
  38 #include <linux/lustre_lib.h>
  39 #include <linux/lustre_net.h>
  40 #include <linux/lustre_idl.h>
  41 #include <linux/lustre_dlm.h>
  42 #include <linux/lustre_mds.h>
  43 #include <linux/obd_class.h>
  44 #include <linux/obd_ost.h>
  45 #include <linux/seq_file.h>
  46 #include <linux/lprocfs_status.h>
  47 #include <linux/lustre_fsfilt.h>
  48 #include <linux/obd_lmv.h>
  49 #include "lmv_internal.h"
  50
  51 int lmv_attach(struct obd_device *dev, obd_count len, void *data)
  52 {
  53         struct lprocfs_static_vars lvars;
  54         struct proc_dir_entry *entry;
  55         int rc;
  56         ENTRY;
  57
  58         lprocfs_init_vars(lmv, &lvars);
  59         rc = lprocfs_obd_attach(dev, lvars.obd_vars);
  60         if (rc)
  61                 RETURN (rc);
  62
  63         entry = create_proc_entry("target_obd", 0444, dev->obd_proc_entry);
  64         if (entry == NULL)
  65                 RETURN(-ENOMEM);
  66         /* entry->proc_fops = &lmv_proc_target_fops; */
  67         entry->data = dev;
  68
  69         RETURN (rc);
  70 }
  71
  72 int lmv_detach(struct obd_device *dev)
  73 {
  74         return lprocfs_obd_detach(dev);
  75 }
  76
  77 static int lmv_connect_fake(struct lustre_handle *conn,
  78                             struct obd_device *obd,
  79                             struct obd_uuid *cluuid)
  80 {
  81         struct lmv_obd *lmv = &obd->u.lmv;
  82         int rc;
  83         ENTRY;
  84
  85         rc = class_connect(conn, obd, cluuid);
  86         if (rc) {
  87                 CERROR("class_connection() returned %d\n", rc);
  88                 RETURN(rc);
  89         }
  90
  91         lmv->exp = class_conn2export(conn);
  92         LASSERT(lmv->exp != NULL);
  93
  94         lmv->cluuid = *cluuid;
  95         lmv->connected = 0;
  96
  97         RETURN(0);
  98 }
  99
 100 int lmv_connect(struct obd_device *obd)
 101 {
 102         struct lmv_obd *lmv = &obd->u.lmv;
 103         struct obd_uuid *cluuid;
 104         struct lmv_tgt_desc *tgts;
 105         struct obd_export *exp;
 106         int rc, i;
 107         ENTRY;
 108
 109         if (lmv->connected)
 110                 RETURN(0);
 111
 112         lmv->connected = 1;
 113         cluuid = &lmv->cluuid;
 114         exp = lmv->exp;
 115         CDEBUG(D_OTHER, "time to connect %s to %s\n",
 116                         cluuid->uuid, obd->obd_name);
 117
 118         /* We don't want to actually do the underlying connections more than
 119          * once, so keep track. */
 120         lmv->refcount++;
 121         if (lmv->refcount > 1) {
 122                 class_export_put(exp);
 123                 RETURN(0);
 124         }
 125
 126         for (i = 0, tgts = lmv->tgts; i < lmv->count; i++, tgts++) {
 127                 struct obd_device *tgt_obd;
 128                 struct obd_uuid lmv_osc_uuid = { "LMV_OSC_UUID" };
 129                 struct lustre_handle conn = {0, };
 130
 131                 LASSERT(tgts != NULL);
 132
 133                 tgt_obd = class_find_client_obd(&tgts->uuid, LUSTRE_MDC_NAME,
 134                                                 &obd->obd_uuid);
 135                 if (!tgt_obd) {
 136                         CERROR("Target %s not attached\n", tgts->uuid.uuid);
 137                         GOTO(out_disc, rc = -EINVAL);
 138                 }
 139
 140                 /* for MDS: don't connect to yourself */
 141                 if (obd_uuid_equals(&tgts->uuid, cluuid)) {
 142                         CDEBUG(D_OTHER, "don't connect back to %s\n",
 143                                cluuid->uuid);
 144                         tgts->exp = NULL;
 145                         continue;
 146                 }
 147
 148                 CDEBUG(D_OTHER, "connect to %s(%s) - %s, %s FOR %s\n",
 149                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 150                         tgts->uuid.uuid, obd->obd_uuid.uuid,
 151                         cluuid->uuid);
 152
 153                 if (!tgt_obd->obd_set_up) {
 154                         CERROR("Target %s not set up\n", tgts->uuid.uuid);
 155                         GOTO(out_disc, rc = -EINVAL);
 156                 }
 157
 158                 rc = obd_connect(&conn, tgt_obd, &lmv_osc_uuid);
 159                 if (rc) {
 160                         CERROR("Target %s connect error %d\n",
 161                                 tgts->uuid.uuid, rc);
 162                         GOTO(out_disc, rc);
 163                 }
 164                 tgts->exp = class_conn2export(&conn);
 165
 166                 obd_init_ea_size(tgts->exp, lmv->max_easize,
 167                                         lmv->max_cookiesize);
 168
 169                 rc = obd_register_observer(tgt_obd, obd);
 170                 if (rc) {
 171                         CERROR("Target %s register_observer error %d\n",
 172                                tgts->uuid.uuid, rc);
 173                         obd_disconnect(tgts->exp, 0);
 174                         GOTO(out_disc, rc);
 175                 }
 176
 177                 CDEBUG(D_OTHER, "connected to %s(%s) successfully (%d)\n",
 178                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 179                         atomic_read(&obd->obd_refcount));
 180         }
 181
 182         class_export_put(exp);
 183         RETURN (0);
 184
 185  out_disc:
 186         /* FIXME: cleanup here */
 187         class_disconnect(exp, 0);
 188         RETURN (rc);
 189 }
 190
 191 static int lmv_disconnect(struct obd_export *exp, int flags)
 192 {
 193         struct obd_device *obd = class_exp2obd(exp);
 194         struct lmv_obd *lmv = &obd->u.lmv;
 195         int rc, i;
 196         ENTRY;
 197
 198         if (!lmv->tgts)
 199                 goto out_local;
 200
 201         /* Only disconnect the underlying layers on the final disconnect. */
 202         lmv->refcount--;
 203         if (lmv->refcount != 0)
 204                 goto out_local;
 205
 206         for (i = 0; i < lmv->count; i++) {
 207                 if (lmv->tgts[i].exp == NULL)
 208                         continue;
 209
 210                 if (obd->obd_no_recov) {
 211                         /* Pass it on to our clients.
 212                          * XXX This should be an argument to disconnect,
 213                          * XXX not a back-door flag on the OBD.  Ah well.
 214                          */
 215                         struct obd_device *mdc_obd;
 216                         mdc_obd = class_exp2obd(lmv->tgts[i].exp);
 217                         if (mdc_obd)
 218                                 mdc_obd->obd_no_recov = 1;
 219                 }
 220
 221                 CDEBUG(D_OTHER, "disconnected from %s(%s) successfully\n",
 222                         lmv->tgts[i].exp->exp_obd->obd_name,
 223                         lmv->tgts[i].exp->exp_obd->obd_uuid.uuid);
 224
 225                 obd_register_observer(lmv->tgts[i].exp->exp_obd, NULL);
 226
 227                 rc = obd_disconnect(lmv->tgts[i].exp, flags);
 228                 lmv->tgts[i].exp = NULL;
 229         }
 230
 231  out_local:
 232         /* FIXME: cleanup here */
 233         if (!lmv->connected)
 234                 class_export_put(exp);
 235         rc = class_disconnect(exp, 0);
 236         RETURN(rc);
 237 }
 238
 239 static int lmv_setup(struct obd_device *obd, obd_count len, void *buf)
 240 {
 241         struct lustre_cfg *lcfg = buf;
 242         struct lmv_desc *desc;
 243         struct lmv_obd *lmv = &obd->u.lmv;
 244         struct obd_uuid *uuids;
 245         struct lmv_tgt_desc *tgts;
 246         int i;
 247         int count;
 248         int rc = 0;
 249         ENTRY;
 250
 251         if (lcfg->lcfg_inllen1 < 1) {
 252                 CERROR("LMV setup requires a descriptor\n");
 253                 RETURN(-EINVAL);
 254         }
 255
 256         if (lcfg->lcfg_inllen2 < 1) {
 257                 CERROR("LMV setup requires an OST UUID list\n");
 258                 RETURN(-EINVAL);
 259         }
 260
 261         desc = (struct lmv_desc *)lcfg->lcfg_inlbuf1;
 262         if (sizeof(*desc) > lcfg->lcfg_inllen1) {
 263                 CERROR("descriptor size wrong: %d > %d\n",
 264                        (int)sizeof(*desc), lcfg->lcfg_inllen1);
 265                 RETURN(-EINVAL);
 266         }
 267
 268         count = desc->ld_count;
 269         uuids = (struct obd_uuid *)lcfg->lcfg_inlbuf2;
 270         if (sizeof(*uuids) * count != lcfg->lcfg_inllen2) {
 271                 CERROR("UUID array size wrong: %u * %u != %u\n",
 272                        sizeof(*uuids), count, lcfg->lcfg_inllen2);
 273                 RETURN(-EINVAL);
 274         }
 275
 276         lmv->bufsize = sizeof(struct lmv_tgt_desc) * count;
 277         OBD_ALLOC(lmv->tgts, lmv->bufsize);
 278         if (lmv->tgts == NULL) {
 279                 CERROR("Out of memory\n");
 280                 RETURN(-EINVAL);
 281         }
 282
 283         for (i = 0, tgts = lmv->tgts; i < count; i++, tgts++) {
 284                 tgts->uuid = uuids[i];
 285                 lmv->count++;
 286         }
 287
 288         lmv->max_easize = sizeof(struct ll_fid) * lmv->count
 289                                         + sizeof(struct mea);
 290         lmv->max_cookiesize = 0;
 291
 292         RETURN(rc);
 293 }
 294
 295 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 296                       unsigned long max_age)
 297 {
 298         struct lmv_obd *lmv = &obd->u.lmv;
 299         struct obd_statfs temp;
 300         int rc = 0, i;
 301         ENTRY;
 302         lmv_connect(obd);
 303         for (i = 0; i < lmv->count; i++) {
 304                 rc = obd_statfs(lmv->tgts[i].exp->exp_obd, &temp, max_age);
 305                 if (rc) {
 306                         CERROR("can't stat MDS #%d (%s)\n", i,
 307                                lmv->tgts[i].exp->exp_obd->obd_name);
 308                         RETURN(rc);
 309                 }
 310                 if (i == 0) {
 311                         memcpy(osfs, &temp, sizeof(temp));
 312                 } else {
 313                         osfs->os_bavail += temp.os_bavail;
 314                         osfs->os_blocks += temp.os_blocks;
 315                         osfs->os_ffree += temp.os_ffree;
 316                         osfs->os_files += temp.os_files;
 317                 }
 318         }
 319         RETURN(rc);
 320 }
 321
 322 static int lmv_cleanup(struct obd_device *obd, int flags)
 323 {
 324         struct lmv_obd *lmv = &obd->u.lmv;
 325         ENTRY;
 326         lmv_cleanup_objs(obd);
 327         OBD_FREE(lmv->tgts, lmv->bufsize);
 328         RETURN(0);
 329 }
 330
 331 static int lmv_getstatus(struct obd_export *exp, struct ll_fid *fid)
 332 {
 333         struct obd_device *obd = exp->exp_obd;
 334         struct lmv_obd *lmv = &obd->u.lmv;
 335         int rc;
 336         ENTRY;
 337         lmv_connect(obd);
 338         rc = md_getstatus(lmv->tgts[0].exp, fid);
 339         fid->mds = 0;
 340         RETURN(rc);
 341 }
 342
 343 static int lmv_getattr(struct obd_export *exp, struct ll_fid *fid,
 344                 unsigned long valid, unsigned int ea_size,
 345                 struct ptlrpc_request **request)
 346 {
 347         struct obd_device *obd = exp->exp_obd;
 348         struct lmv_obd *lmv = &obd->u.lmv;
 349         int rc, i = fid->mds;
 350         struct lmv_obj *obj;
 351         ENTRY;
 352         lmv_connect(obd);
 353         obj = lmv_grab_obj(obd, fid, 0);
 354         CDEBUG(D_OTHER, "GETATTR for %lu/%lu/%lu %s\n",
 355                (unsigned long) fid->mds,
 356                (unsigned long) fid->id,
 357                (unsigned long) fid->generation,
 358                obj ? "(splitted)" : "");
 359
 360         LASSERT(fid->mds < lmv->count);
 361         rc = md_getattr(lmv->tgts[i].exp, fid,
 362                              valid, ea_size, request);
 363         if (rc == 0 && obj) {
 364                 /* we have to loop over dirobjs here and gather attrs
 365                  * for all the slaves */
 366 #warning "attrs gathering here"
 367         }
 368         lmv_put_obj(obj);
 369         RETURN(rc);
 370 }
 371
 372 static int lmv_change_cbdata(struct obd_export *exp,
 373                                  struct ll_fid *fid,
 374                                  ldlm_iterator_t it, void *data)
 375 {
 376         struct obd_device *obd = exp->exp_obd;
 377         struct lmv_obd *lmv = &obd->u.lmv;
 378         int rc = 0;
 379         ENTRY;
 380         lmv_connect(obd);
 381         CDEBUG(D_OTHER, "CBDATA for %lu/%lu/%lu\n",
 382                (unsigned long) fid->mds,
 383                (unsigned long) fid->id,
 384                (unsigned long) fid->generation);
 385         LASSERT(fid->mds < lmv->count);
 386         rc = md_change_cbdata(lmv->tgts[fid->mds].exp, fid, it, data);
 387         RETURN(rc);
 388 }
 389
 390 static int lmv_change_cbdata_name(struct obd_export *exp, struct ll_fid *pfid,
 391                                   char *name, int len, struct ll_fid *cfid,
 392                                   ldlm_iterator_t it, void *data)
 393 {
 394         struct obd_device *obd = exp->exp_obd;
 395         struct lmv_obd *lmv = &obd->u.lmv;
 396         struct lmv_obj *obj;
 397         int rc = 0, mds;
 398         ENTRY;
 399         lmv_connect(obd);
 400         LASSERT(pfid->mds < lmv->count);
 401         LASSERT(cfid->mds < lmv->count);
 402         CDEBUG(D_OTHER, "CBDATA for %lu/%lu/%lu:%*s -> %lu/%lu/%lu\n",
 403                (unsigned long) pfid->mds, (unsigned long) pfid->id,
 404                (unsigned long) pfid->generation, len, name,
 405                (unsigned long) cfid->mds, (unsigned long) cfid->id,
 406                (unsigned long) cfid->generation);
 407
 408         /* this is default mds for directory name belongs to */
 409         mds = pfid->mds;
 410         obj = lmv_grab_obj(obd, pfid, 0);
 411         if (obj) {
 412                 /* directory is splitted. look for right mds for this name */
 413                 mds = raw_name2idx(obj->objcount, name, len);
 414                 lmv_put_obj(obj);
 415         }
 416         rc = md_change_cbdata(lmv->tgts[mds].exp, cfid, it, data);
 417         RETURN(rc);
 418 }
 419
 420 static int lmv_valid_attrs(struct obd_export *exp, struct ll_fid *fid)
 421 {
 422         struct obd_device *obd = exp->exp_obd;
 423         struct lmv_obd *lmv = &obd->u.lmv;
 424         int rc = 0;
 425         ENTRY;
 426         lmv_connect(obd);
 427         CDEBUG(D_OTHER, "validate %lu/%lu/%lu\n",
 428                (unsigned long) fid->mds,
 429                (unsigned long) fid->id,
 430                (unsigned long) fid->generation);
 431         LASSERT(fid->mds < lmv->count);
 432         rc = md_valid_attrs(lmv->tgts[fid->mds].exp, fid);
 433         RETURN(rc);
 434 }
 435
 436 int lmv_close(struct obd_export *exp, struct obdo *obdo,
 437                   struct obd_client_handle *och,
 438                   struct ptlrpc_request **request)
 439 {
 440         struct obd_device *obd = exp->exp_obd;
 441         struct lmv_obd *lmv = &obd->u.lmv;
 442         int rc, i = obdo->o_mds;
 443         ENTRY;
 444         lmv_connect(obd);
 445         LASSERT(i < lmv->count);
 446         CDEBUG(D_OTHER, "CLOSE %lu/%lu/%lu\n", (unsigned long) obdo->o_mds,
 447                (unsigned long) obdo->o_id, (unsigned long) obdo->o_generation);
 448         rc = md_close(lmv->tgts[i].exp, obdo, och, request);
 449         RETURN(rc);
 450 }
 451
 452 int lmv_create(struct obd_export *exp, struct mdc_op_data *op_data,
 453                    const void *data, int datalen, int mode, __u32 uid,
 454                    __u32 gid, __u64 rdev, struct ptlrpc_request **request)
 455 {
 456         struct obd_device *obd = exp->exp_obd;
 457         struct lmv_obd *lmv = &obd->u.lmv;
 458         struct mea *mea = op_data->mea1;
 459         struct mds_body *mds_body;
 460         int rc, i, free_mea = 0;
 461         ENTRY;
 462         lmv_connect(obd);
 463         /* TODO: where to create new directories?
 464          * current design don't support directory on a slave MDS,
 465          * but we lookup by name may forward any request in slave
 466          */
 467 repeat:
 468         i = mea_name2idx(mea, (char *) op_data->name, op_data->namelen);
 469         if (mea)
 470                 op_data->fid1 = mea->mea_fids[i];
 471
 472         CDEBUG(D_OTHER, "CREATE '%*s' on %lu/%lu/%lu (mea 0x%p)\n",
 473                         op_data->namelen, op_data->name,
 474                         (unsigned long) op_data->fid1.mds,
 475                         (unsigned long) op_data->fid1.id,
 476                         (unsigned long) op_data->fid1.generation, mea);
 477         rc = md_create(lmv->tgts[i].exp, op_data, data, datalen,
 478                             mode, uid, gid, rdev, request);
 479         if (rc == 0) {
 480                 if (*request == NULL)
 481                      RETURN(rc);
 482                 mds_body = lustre_msg_buf((*request)->rq_repmsg, 0,
 483                                           sizeof(*mds_body));
 484                 LASSERT(mds_body != NULL);
 485                 CDEBUG(D_OTHER, "created. id = %lu, generation = %lu, mds = %d\n",
 486                        (unsigned long) mds_body->fid1.id,
 487                        (unsigned long) mds_body->fid1.generation, i);
 488                 LASSERT(mds_body->mds == i);
 489         } else if (rc == -ESTALE) {
 490                 struct ptlrpc_request *req = NULL;
 491                 struct lustre_md md;
 492                 int mealen;
 493
 494                 CDEBUG(D_OTHER, "it seems MDS splitted dir\n");
 495                 LASSERT(mea == NULL);
 496
 497                 mealen = sizeof(struct ll_fid)*lmv->count + sizeof(struct mea);
 498                 /* time to update mea of parent fid */
 499                 i = op_data->fid1.mds;
 500                 rc = md_getattr(lmv->tgts[i].exp, &op_data->fid1,
 501                                         OBD_MD_FLEASIZE, mealen, &req);
 502                 LASSERT(rc == 0);
 503                 md.mea = NULL;
 504                 rc = mdc_req2lustre_md(req, 0, NULL, exp, &md);
 505                 LASSERT(rc == 0);
 506                 LASSERT(md.mea != NULL);
 507                 mea = md.mea;
 508                 ptlrpc_req_finished(req);
 509                 free_mea = 1;
 510
 511                 goto repeat;
 512         }
 513         if (free_mea)
 514                 obd_free_memmd(exp, (struct lov_stripe_md**) &mea);
 515         RETURN(rc);
 516 }
 517
 518 int lmv_done_writing(struct obd_export *exp, struct obdo *obdo)
 519 {
 520         struct obd_device *obd = exp->exp_obd;
 521         struct lmv_obd *lmv = &obd->u.lmv;
 522         int rc;
 523         ENTRY;
 524         lmv_connect(obd);
 525         /* FIXME: choose right MDC here */
 526         rc = md_done_writing(lmv->tgts[0].exp, obdo);
 527         RETURN(rc);
 528 }
 529
 530 int lmv_enqueue(struct obd_export *exp, int lock_type,
 531                     struct lookup_intent *it, int lock_mode,
 532                     struct mdc_op_data *data, struct lustre_handle *lockh,
 533                     void *lmm, int lmmsize,
 534                     ldlm_completion_callback cb_completion,
 535                     ldlm_blocking_callback cb_blocking, void *cb_data)
 536 {
 537         struct obd_device *obd = exp->exp_obd;
 538         struct lmv_obd *lmv = &obd->u.lmv;
 539         struct lmv_obj *obj;
 540         int rc, mds;
 541         ENTRY;
 542         lmv_connect(obd);
 543         if (data->namelen) {
 544                 obj = lmv_grab_obj(obd, &data->fid1, 0);
 545                 if (obj) {
 546                         /* directory is splitted. look for
 547                          * right mds for this name */
 548                         mds = raw_name2idx(obj->objcount, data->name,
 549                                                 data->namelen);
 550                         data->fid1 = obj->objs[mds].fid;
 551                         lmv_put_obj(obj);
 552                 }
 553         }
 554         CDEBUG(D_OTHER, "ENQUEUE '%s' on %lu/%lu\n",
 555                LL_IT2STR(it), (unsigned long) data->fid1.id,
 556                (unsigned long) data->fid1.generation);
 557         rc = md_enqueue(lmv->tgts[data->fid1.mds].exp, lock_type, it,
 558                         lock_mode, data, lockh, lmm, lmmsize, cb_completion,
 559                         cb_blocking, cb_data);
 560
 561         RETURN(rc);
 562 }
 563
 564 int lmv_getattr_name(struct obd_export *exp, struct ll_fid *fid,
 565                          char *filename, int namelen, unsigned long valid,
 566                          unsigned int ea_size, struct ptlrpc_request **request)
 567 {
 568         struct obd_device *obd = exp->exp_obd;
 569         struct lmv_obd *lmv = &obd->u.lmv;
 570         struct ll_fid rfid = *fid;
 571         int rc, mds = fid->mds;
 572         struct lmv_obj *obj;
 573         ENTRY;
 574         lmv_connect(obd);
 575         CDEBUG(D_OTHER, "getattr_name for %*s on %lu/%lu/%lu\n",
 576                namelen - 1, filename, (unsigned long) fid->mds,
 577                (unsigned long) fid->id, (unsigned long) fid->generation);
 578         obj = lmv_grab_obj(obd, fid, 0);
 579         if (obj) {
 580                 /* directory is splitted. look for right mds for this name */
 581                 mds = raw_name2idx(obj->objcount, filename, namelen - 1);
 582                 rfid = obj->objs[mds].fid;
 583                 lmv_put_obj(obj);
 584         }
 585         rc = md_getattr_name(lmv->tgts[mds].exp, &rfid, filename, namelen,
 586                                   valid, ea_size, request);
 587         RETURN(rc);
 588 }
 589
 590
 591 /*
 592  * llite passes fid of an target inode in data->fid1 and
 593  * fid of directory in data->fid2
 594  */
 595 int lmv_link(struct obd_export *exp, struct mdc_op_data *data,
 596              struct ptlrpc_request **request)
 597 {
 598         struct obd_device *obd = exp->exp_obd;
 599         struct lmv_obd *lmv = &obd->u.lmv;
 600         struct mea *mea = data->mea2;
 601         int rc, i;
 602         ENTRY;
 603         lmv_connect(obd);
 604         if (data->namelen != 0) {
 605                 /* usual link request */
 606                 i = mea_name2idx(mea, (char *) data->name, data->namelen);
 607                 if (mea)
 608                         data->fid2 = mea->mea_fids[i];
 609                 CDEBUG(D_OTHER,"link %u/%u/%u:%*s to %u/%u/%u mds %d mea %p\n",
 610                        (unsigned) data->fid2.mds, (unsigned) data->fid2.id,
 611                        (unsigned) data->fid2.generation, data->namelen,
 612                        data->name, (unsigned) data->fid1.mds,
 613                        (unsigned) data->fid1.id,
 614                        (unsigned) data->fid1.generation, i, mea);
 615         } else {
 616                 /* request from MDS to acquire i_links for inode by fid1 */
 617                 i = data->fid1.mds;
 618                 CDEBUG(D_OTHER, "inc i_nlinks for %u/%u/%u\n",
 619                        (unsigned) data->fid1.mds, (unsigned) data->fid1.id,
 620                        (unsigned) data->fid1.generation);
 621         }
 622
 623         rc = md_link(lmv->tgts[i].exp, data, request);
 624         RETURN(rc);
 625 }
 626
 627 int lmv_rename(struct obd_export *exp, struct mdc_op_data *data,
 628                const char *old, int oldlen, const char *new, int newlen,
 629                struct ptlrpc_request **request)
 630 {
 631         struct obd_device *obd = exp->exp_obd;
 632         struct lmv_obd *lmv = &obd->u.lmv;
 633         struct lmv_obj *obj;
 634         int rc, mds;
 635         ENTRY;
 636
 637         CDEBUG(D_OTHER, "rename %*s in %lu/%lu/%lu to %*s in %lu/%lu/%lu\n",
 638                oldlen, old, (unsigned long) data->fid1.mds,
 639                (unsigned long) data->fid1.id,
 640                (unsigned long) data->fid1.generation,
 641                newlen, new, (unsigned long) data->fid2.mds,
 642                (unsigned long) data->fid2.id,
 643                (unsigned long) data->fid2.generation);
 644
 645         lmv_connect(obd);
 646
 647         if (oldlen == 0) {
 648                 /* MDS with old dir entry is asking another MDS
 649                  * to create name there */
 650                 CDEBUG(D_OTHER,
 651                        "create %*s(%d/%d) in %lu/%lu/%lu pointing to %lu/%lu/%lu\n",
 652                        newlen, new, oldlen, newlen,
 653                        (unsigned long) data->fid2.mds,
 654                        (unsigned long) data->fid2.id,
 655                        (unsigned long) data->fid2.generation,
 656                        (unsigned long) data->fid1.mds,
 657                        (unsigned long) data->fid1.id,
 658                        (unsigned long) data->fid1.generation);
 659                 mds = data->fid2.mds;
 660                 goto request;
 661         }
 662
 663         obj = lmv_grab_obj(obd, &data->fid1, 0);
 664         if (obj) {
 665                 /* directory is already splitted, so we have to forward
 666                  * request to the right MDS */
 667                 mds = raw_name2idx(obj->objcount, old, oldlen);
 668                 data->fid1 = obj->objs[mds].fid;
 669                 CDEBUG(D_OTHER, "forward to MDS #%u (%lu/%lu/%lu)\n", mds,
 670                        (unsigned long) obj->objs[mds].fid.mds,
 671                        (unsigned long) obj->objs[mds].fid.id,
 672                        (unsigned long) obj->objs[mds].fid.generation);
 673         }
 674         lmv_put_obj(obj);
 675
 676         obj = lmv_grab_obj(obd, &data->fid2, 0);
 677         if (obj) {
 678                 /* directory is already splitted, so we have to forward
 679                  * request to the right MDS */
 680                 mds = raw_name2idx(obj->objcount, new, newlen);
 681                 data->fid2 = obj->objs[mds].fid;
 682                 CDEBUG(D_OTHER, "forward to MDS #%u (%lu/%lu/%lu)\n", mds,
 683                        (unsigned long) obj->objs[mds].fid.mds,
 684                        (unsigned long) obj->objs[mds].fid.id,
 685                        (unsigned long) obj->objs[mds].fid.generation);
 686         }
 687         lmv_put_obj(obj);
 688
 689         mds = data->fid1.mds;
 690
 691 request:
 692         rc = md_rename(lmv->tgts[mds].exp, data, old, oldlen,
 693                             new, newlen, request);
 694         RETURN(rc);
 695 }
 696
 697 int lmv_setattr(struct obd_export *exp, struct mdc_op_data *data,
 698                 struct iattr *iattr, void *ea, int ealen, void *ea2, int ea2len,
 699                 struct ptlrpc_request **request)
 700 {
 701         struct obd_device *obd = exp->exp_obd;
 702         struct lmv_obd *lmv = &obd->u.lmv;
 703         int rc = 0, i = data->fid1.mds;
 704         struct ptlrpc_request *req;
 705         struct mds_body *mds_body;
 706         struct lmv_obj *obj;
 707         ENTRY;
 708         lmv_connect(obd);
 709         obj = lmv_grab_obj(obd, &data->fid1, 0);
 710         CDEBUG(D_OTHER, "SETATTR for %lu/%lu/%lu, valid 0x%x%s\n",
 711                (unsigned long) data->fid1.mds,
 712                (unsigned long) data->fid1.id,
 713                (unsigned long) data->fid1.generation, iattr->ia_valid,
 714                obj ? ", splitted" : "");
 715         if (obj) {
 716                 for (i = 0; i < obj->objcount; i++) {
 717                         data->fid1 = obj->objs[i].fid;
 718                         rc = md_setattr(lmv->tgts[i].exp, data, iattr, ea,
 719                                         ealen, ea2, ea2len, &req);
 720                         LASSERT(rc == 0);
 721                         if (fid_equal(&obj->fid, &obj->objs[i].fid)) {
 722                                 /* this is master object and this request
 723                                  * should be returned back to llite */
 724                                 *request = req;
 725                         } else {
 726                                 ptlrpc_req_finished(req);
 727                         }
 728                 }
 729                 lmv_put_obj(obj);
 730         } else {
 731                 LASSERT(data->fid1.mds < lmv->count);
 732                 rc = md_setattr(lmv->tgts[i].exp, data, iattr, ea, ealen,
 733                                 ea2, ea2len, request);
 734                 if (rc == 0) {
 735                         mds_body = lustre_msg_buf((*request)->rq_repmsg, 0,
 736                                         sizeof(*mds_body));
 737                         LASSERT(mds_body != NULL);
 738                         LASSERT(mds_body->mds == i);
 739                 }
 740         }
 741         RETURN(rc);
 742 }
 743
 744 int lmv_sync(struct obd_export *exp, struct ll_fid *fid,
 745              struct ptlrpc_request **request)
 746 {
 747         struct obd_device *obd = exp->exp_obd;
 748         struct lmv_obd *lmv = &obd->u.lmv;
 749         int rc;
 750         ENTRY;
 751         lmv_connect(obd);
 752         rc = md_sync(lmv->tgts[0].exp, fid, request);
 753         RETURN(rc);
 754 }
 755
 756 int lmv_dirobj_blocking_ast(struct ldlm_lock *lock,
 757                             struct ldlm_lock_desc *desc, void *data, int flag)
 758 {
 759         struct lustre_handle lockh;
 760         struct lmv_obj *obj;
 761         int rc;
 762         ENTRY;
 763
 764         switch (flag) {
 765         case LDLM_CB_BLOCKING:
 766                 ldlm_lock2handle(lock, &lockh);
 767                 rc = ldlm_cli_cancel(&lockh);
 768                 if (rc < 0) {
 769                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 770                         RETURN(rc);
 771                 }
 772                 break;
 773         case LDLM_CB_CANCELING:
 774                 /* time to drop cached attrs for dirobj */
 775                 obj = lock->l_ast_data;
 776                 if (!obj)
 777                         break;
 778
 779                 CDEBUG(D_OTHER, "cancel %s on %lu/%lu, master %lu/%lu/%lu\n",
 780                        lock->l_resource->lr_name.name[3] == 1 ?
 781                                 "LOOKUP" : "UPDATE",
 782                        (unsigned long) lock->l_resource->lr_name.name[0],
 783                        (unsigned long) lock->l_resource->lr_name.name[1],
 784                        (unsigned long) obj->fid.mds,
 785                        (unsigned long) obj->fid.id,
 786                        (unsigned long) obj->fid.generation);
 787                 break;
 788         default:
 789                 LBUG();
 790         }
 791         RETURN(0);
 792 }
 793
 794 int lmv_readpage(struct obd_export *exp, struct ll_fid *mdc_fid,
 795                  __u64 offset, struct page *page,
 796                  struct ptlrpc_request **request)
 797 {
 798         struct obd_device *obd = exp->exp_obd;
 799         struct lmv_obd *lmv = &obd->u.lmv;
 800         struct ll_fid rfid = *mdc_fid;
 801         struct lmv_obj *obj;
 802         int rc, i;
 803         ENTRY;
 804         lmv_connect(obd);
 805
 806         LASSERT(mdc_fid->mds < lmv->count);
 807         CDEBUG(D_OTHER, "READPAGE at %llu from %lu/%lu/%lu\n",
 808                offset, (unsigned long) rfid.mds,
 809                (unsigned long) rfid.id,
 810                (unsigned long) rfid.generation);
 811
 812         obj = lmv_grab_obj(obd, mdc_fid, 0);
 813         if (obj) {
 814                 /* find dirobj containing page with requested offset */
 815                 /* FIXME: what about protecting cached attrs here? */
 816                 for (i = 0; i < obj->objcount; i++) {
 817                         if (offset < obj->objs[i].size)
 818                                 break;
 819                         offset -= obj->objs[i].size;
 820                 }
 821                 rfid = obj->objs[i].fid;
 822                 CDEBUG(D_OTHER, "forward to %lu/%lu/%lu with offset %lu\n",
 823                        (unsigned long) rfid.mds,
 824                        (unsigned long) rfid.id,
 825                        (unsigned long) rfid.generation,
 826                        (unsigned long) offset);
 827         }
 828         rc = md_readpage(lmv->tgts[rfid.mds].exp, &rfid, offset, page, request);
 829
 830         lmv_put_obj(obj);
 831
 832 #warning "we need fix for duplicate . and .. from slaves"
 833
 834         RETURN(rc);
 835 }
 836
 837 int lmv_unlink(struct obd_export *exp, struct mdc_op_data *data,
 838                struct ptlrpc_request **request)
 839 {
 840         struct obd_device *obd = exp->exp_obd;
 841         struct lmv_obd *lmv = &obd->u.lmv;
 842         struct mea *mea = data->mea1;
 843         int rc, i = 0;
 844         ENTRY;
 845         lmv_connect(obd);
 846         if (data->namelen != 0) {
 847                 i = mea_name2idx(mea, (char *) data->name, data->namelen);
 848                 if (mea)
 849                         data->fid1 = mea->mea_fids[i];
 850                 CDEBUG(D_OTHER, "unlink '%*s' in %lu/%lu/%lu -> %u\n",
 851                        data->namelen, data->name,
 852                        (unsigned long) data->fid1.mds,
 853                        (unsigned long) data->fid1.id,
 854                        (unsigned long) data->fid1.generation, i);
 855         } else {
 856                 i = data->fid1.mds;
 857                 CDEBUG(D_OTHER, "drop i_nlink on %lu/%lu/%lu\n",
 858                        (unsigned long) data->fid1.mds,
 859                        (unsigned long) data->fid1.id,
 860                        (unsigned long) data->fid1.generation);
 861         }
 862         rc = md_unlink(lmv->tgts[i].exp, data, request);
 863         RETURN(rc);
 864 }
 865
 866 struct obd_device *lmv_get_real_obd(struct obd_export *exp,
 867                                         char *name, int len)
 868 {
 869         struct obd_device *obd = exp->exp_obd;
 870         struct lmv_obd *lmv = &obd->u.lmv;
 871         ENTRY;
 872         lmv_connect(obd);
 873         obd = lmv->tgts[0].exp->exp_obd;
 874         EXIT;
 875         return obd;
 876 }
 877
 878 int lmv_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
 879 {
 880         struct obd_device *obd = exp->exp_obd;
 881         struct lmv_obd *lmv = &obd->u.lmv;
 882         int i, rc = 0, change = 0;
 883         ENTRY;
 884
 885         if (lmv->max_easize < easize) {
 886                 lmv->max_easize = easize;
 887                 change = 1;
 888         }
 889         if (lmv->max_cookiesize < cookiesize) {
 890                 lmv->max_cookiesize = cookiesize;
 891                 change = 1;
 892         }
 893         if (change == 0)
 894                 RETURN(0);
 895
 896         if (lmv->connected == 0)
 897                 RETURN(0);
 898
 899         /* FIXME: error handling? */
 900         for (i = 0; i < lmv->count; i++)
 901                 rc = obd_init_ea_size(lmv->tgts[i].exp, easize, cookiesize);
 902         RETURN(rc);
 903 }
 904
 905 /*
 906  * to be called from MDS only
 907  */
 908 int lmv_obd_create(struct obd_export *exp, struct obdo *oa,
 909                struct lov_stripe_md **ea, struct obd_trans_info *oti)
 910 {
 911         struct obd_device *obd = exp->exp_obd;
 912         struct lmv_obd *lmv = &obd->u.lmv;
 913         struct mea *mea;
 914         int i, c, rc = 0;
 915         struct ll_fid mfid;
 916         ENTRY;
 917         lmv_connect(obd);
 918
 919         LASSERT(ea != NULL);
 920         LASSERT(oa != NULL);
 921
 922         if (*ea == NULL) {
 923                 rc = obd_alloc_diskmd(exp, (struct lov_mds_md **) ea);
 924                 LASSERT(*ea != NULL);
 925         }
 926
 927         mea = (struct mea *) *ea;
 928         mfid.id = oa->o_id;
 929         mfid.generation = oa->o_generation;
 930         rc = 0;
 931         if (!mea->mea_count || mea->mea_count > lmv->count)
 932                 mea->mea_count = lmv->count;
 933
 934         mea->mea_master = -1;
 935
 936         /* FIXME: error handling? */
 937         for (i = 0, c = 0; c < mea->mea_count && i < lmv->count; i++) {
 938                 struct lov_stripe_md obj_md;
 939                 struct lov_stripe_md *obj_mdp = &obj_md;
 940
 941                 if (lmv->tgts[i].exp == NULL) {
 942                         /* this is master MDS */
 943                         mea->mea_fids[c].id = mfid.id;
 944                         mea->mea_fids[c].generation = mfid.generation;
 945                         mea->mea_fids[c].mds = i;
 946                         mea->mea_master = i;
 947                         c++;
 948                         continue;
 949                 }
 950
 951                 /* "Master" MDS should always be part of stripped dir, so
 952                    scan for it */
 953                 if (mea->mea_master == -1 && c == mea->mea_count - 1)
 954                         continue;
 955
 956                 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLTYPE | OBD_MD_FLMODE
 957                                 | OBD_MD_FLUID | OBD_MD_FLGID;
 958
 959                 rc = obd_create(lmv->tgts[c].exp, oa, &obj_mdp, oti);
 960                 /* FIXME: error handling here */
 961                 LASSERT(rc == 0);
 962
 963                 mea->mea_fids[c].id = oa->o_id;
 964                 mea->mea_fids[c].generation = oa->o_generation;
 965                 mea->mea_fids[c].mds = i;
 966                 c++;
 967                 CDEBUG(D_OTHER, "dirobj at mds %d: "LPU64"/%u\n",
 968                        i, oa->o_id, oa->o_generation);
 969         }
 970         LASSERT(c == mea->mea_count);
 971         CDEBUG(D_OTHER, "%d dirobjects created\n", (int) mea->mea_count);
 972
 973         RETURN(rc);
 974 }
 975
 976 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
 977                            void *key, __u32 *vallen, void *val)
 978 {
 979         struct obd_device *obd;
 980         struct lmv_obd *lmv;
 981         ENTRY;
 982
 983         obd = class_exp2obd(exp);
 984         if (obd == NULL) {
 985                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
 986                        exp->exp_handle.h_cookie);
 987                 RETURN(-EINVAL);
 988         }
 989
 990         lmv = &obd->u.lmv;
 991         if (keylen == 6 && memcmp(key, "mdsize", 6) == 0) {
 992                 __u32 *mdsize = val;
 993                 *vallen = sizeof(__u32);
 994                 *mdsize = sizeof(struct ll_fid) * lmv->count
 995                                 + sizeof(struct mea);
 996                 RETURN(0);
 997         } else if (keylen == 6 && memcmp(key, "mdsnum", 6) == 0) {
 998                 struct obd_uuid *cluuid = &lmv->cluuid;
 999                 struct lmv_tgt_desc *tgts;
1000                 __u32 *mdsnum = val;
1001                 int i;
1002
1003                 for (i = 0, tgts = lmv->tgts; i < lmv->count; i++, tgts++) {
1004                         if (obd_uuid_equals(&tgts->uuid, cluuid)) {
1005                                 *vallen = sizeof(__u32);
1006                                 *mdsnum = i;
1007                                 RETURN(0);
1008                         }
1009                 }
1010                 LASSERT(0);
1011         }
1012
1013         CDEBUG(D_IOCTL, "invalid key\n");
1014         RETURN(-EINVAL);
1015 }
1016
1017 int lmv_set_info(struct obd_export *exp, obd_count keylen,
1018                  void *key, obd_count vallen, void *val)
1019 {
1020         struct obd_device *obd;
1021         struct lmv_obd *lmv;
1022         ENTRY;
1023
1024         obd = class_exp2obd(exp);
1025         if (obd == NULL) {
1026                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1027                        exp->exp_handle.h_cookie);
1028                 RETURN(-EINVAL);
1029         }
1030         lmv = &obd->u.lmv;
1031         lmv_connect(obd);
1032
1033         if (keylen >= strlen("client") && strcmp(key, "client") == 0) {
1034                 struct lmv_tgt_desc *tgts;
1035                 int i, rc;
1036
1037                 for (i = 0, tgts = lmv->tgts; i < lmv->count; i++, tgts++) {
1038                         rc = obd_set_info(tgts->exp, keylen, key, vallen, val);
1039                         if (rc)
1040                                 RETURN(rc);
1041                 }
1042                 RETURN(0);
1043         }
1044
1045         RETURN(-EINVAL);
1046 }
1047
1048 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
1049                struct lov_stripe_md *lsm)
1050 {
1051         struct obd_device *obd = class_exp2obd(exp);
1052         struct lmv_obd *lmv = &obd->u.lmv;
1053         int mea_size;
1054         ENTRY;
1055         lmv_connect(obd);
1056
1057         mea_size = sizeof(struct ll_fid) * lmv->count + sizeof(struct mea);
1058         if (!lmmp)
1059                 RETURN(mea_size);
1060
1061         if (*lmmp && !lsm) {
1062                 OBD_FREE(*lmmp, mea_size);
1063                 *lmmp = NULL;
1064                 RETURN(0);
1065         }
1066
1067         if (!*lmmp) {
1068                 OBD_ALLOC(*lmmp, mea_size);
1069                 if (!*lmmp)
1070                         RETURN(-ENOMEM);
1071         }
1072
1073         if (!lsm)
1074                 RETURN(mea_size);
1075
1076 #warning "MEA packing/convertation must be here! -bzzz"
1077         memcpy(*lmmp, lsm, mea_size);
1078         RETURN(mea_size);
1079 }
1080
1081 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **mem_tgt,
1082                         struct lov_mds_md *disk_src, int mdsize)
1083 {
1084         struct obd_device *obd = class_exp2obd(exp);
1085         struct lmv_obd *lmv = &obd->u.lmv;
1086         struct mea **tmea = (struct mea **) mem_tgt;
1087         struct mea *mea = (void *) disk_src;
1088         int mea_size;
1089         ENTRY;
1090         lmv_connect(obd);
1091
1092         mea_size = sizeof(struct ll_fid) * lmv->count + sizeof(struct mea);
1093         if (mem_tgt == NULL)
1094                 return mea_size;
1095
1096         if (*mem_tgt != NULL && disk_src == NULL) {
1097                 OBD_FREE(*tmea, mea_size);
1098                 RETURN(0);
1099         }
1100
1101         LASSERT(mea_size == mdsize);
1102
1103         OBD_ALLOC(*tmea, mea_size);
1104         /* FIXME: error handling here */
1105         LASSERT(*tmea != NULL);
1106
1107         if (!disk_src)
1108                 RETURN(mea_size);
1109
1110 #warning "MEA unpacking/convertation must be here! -bzzz"
1111         memcpy(*tmea, mea, mdsize);
1112         RETURN(mea_size);
1113 }
1114
1115 int lmv_brw(int rw, struct obd_export *exp, struct obdo *oa,
1116                 struct lov_stripe_md *ea, obd_count oa_bufs,
1117                 struct brw_page *pgarr, struct obd_trans_info *oti)
1118 {
1119         struct obd_device *obd = exp->exp_obd;
1120         struct lmv_obd *lmv = &obd->u.lmv;
1121         struct mea *mea = (struct mea *) ea;
1122         int err;
1123
1124         LASSERT(oa != NULL);
1125         LASSERT(ea != NULL);
1126         LASSERT(pgarr != NULL);
1127         LASSERT(oa->o_mds < lmv->count);
1128
1129         oa->o_gr = mea->mea_fids[oa->o_mds].generation;
1130         oa->o_id = mea->mea_fids[oa->o_mds].id;
1131         oa->o_valid =  OBD_MD_FLID | OBD_MD_FLGROUP;
1132         err = obd_brw(rw, lmv->tgts[oa->o_mds].exp, oa,
1133                         NULL, oa_bufs, pgarr, oti);
1134         RETURN(err);
1135 }
1136
1137 struct obd_ops lmv_obd_ops = {
1138         o_owner:                THIS_MODULE,
1139         o_attach:               lmv_attach,
1140         o_detach:               lmv_detach,
1141         o_setup:                lmv_setup,
1142         o_cleanup:              lmv_cleanup,
1143         o_connect:              lmv_connect_fake,
1144         o_disconnect:           lmv_disconnect,
1145         o_statfs:               lmv_statfs,
1146         o_get_info:             lmv_get_info,
1147         o_set_info:             lmv_set_info,
1148         o_create:               lmv_obd_create,
1149         o_packmd:               lmv_packmd,
1150         o_unpackmd:             lmv_unpackmd,
1151         o_brw:                  lmv_brw,
1152         o_init_ea_size:         lmv_init_ea_size,
1153 };
1154
1155 struct md_ops lmv_md_ops = {
1156         m_getstatus:            lmv_getstatus,
1157         m_getattr:              lmv_getattr,
1158         m_change_cbdata:        lmv_change_cbdata,
1159         m_change_cbdata_name:   lmv_change_cbdata_name,
1160         m_close:                lmv_close,
1161         m_create:               lmv_create,
1162         m_done_writing:         lmv_done_writing,
1163         m_enqueue:              lmv_enqueue,
1164         m_getattr_name:         lmv_getattr_name,
1165         m_intent_lock:          lmv_intent_lock,
1166         m_link:                 lmv_link,
1167         m_rename:               lmv_rename,
1168         m_setattr:              lmv_setattr,
1169         m_sync:                 lmv_sync,
1170         m_readpage:             lmv_readpage,
1171         m_unlink:               lmv_unlink,
1172         m_get_real_obd:         lmv_get_real_obd,
1173         m_valid_attrs:          lmv_valid_attrs,
1174 };
1175
1176 //#ifndef LPROCFS
1177 static struct lprocfs_vars lprocfs_module_vars[] = { {0} };
1178 static struct lprocfs_vars lprocfs_obd_vars[] = { {0} };
1179 //#else
1180 LPROCFS_INIT_VARS(lmv, lprocfs_module_vars, lprocfs_obd_vars)
1181
1182 int __init lmv_init(void)
1183 {
1184         struct lprocfs_static_vars lvars;
1185         int rc;
1186
1187         lprocfs_init_vars(lmv, &lvars);
1188         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
1189                                  lvars.module_vars, OBD_LMV_DEVICENAME);
1190         RETURN(rc);
1191 }
1192
1193 static void lmv_exit(void)
1194 {
1195         class_unregister_type(OBD_LMV_DEVICENAME);
1196 }
1197
1198 #ifdef __KERNEL__
1199 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1200 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
1201 MODULE_LICENSE("GPL");
1202
1203 module_init(lmv_init);
1204 module_exit(lmv_exit);
1205 #endif
1206