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 #include <linux/ext2_fs.h>
  37
  38 #include <linux/obd_support.h>
  39 #include <linux/lustre_lib.h>
  40 #include <linux/lustre_net.h>
  41 #include <linux/lustre_idl.h>
  42 #include <linux/lustre_dlm.h>
  43 #include <linux/lustre_mds.h>
  44 #include <linux/obd_class.h>
  45 #include <linux/obd_ost.h>
  46 #include <linux/seq_file.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         struct proc_dir_entry *entry;
  56         int rc;
  57         ENTRY;
  58
  59         lprocfs_init_vars(lmv, &lvars);
  60         rc = lprocfs_obd_attach(dev, lvars.obd_vars);
  61         if (rc)
  62                 RETURN (rc);
  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
  70         RETURN (rc);
  71 }
  72
  73 int lmv_detach(struct obd_device *dev)
  74 {
  75         return lprocfs_obd_detach(dev);
  76 }
  77
  78 static int lmv_connect_fake(struct lustre_handle *conn,
  79                             struct obd_device *obd,
  80                             struct obd_uuid *cluuid)
  81 {
  82         struct lmv_obd *lmv = &obd->u.lmv;
  83         struct obd_export *exp;
  84         int rc;
  85         ENTRY;
  86
  87         rc = class_connect(conn, obd, cluuid);
  88         if (rc) {
  89                 CERROR("class_connection() returned %d\n", rc);
  90                 RETURN(rc);
  91         }
  92
  93         exp = class_conn2export(conn);
  94         /* We don't want to actually do the underlying connections more than
  95          * once, so keep track. */
  96         lmv->refcount++;
  97         if (lmv->refcount > 1) {
  98                 class_export_put(exp);
  99                 RETURN(0);
 100         }
 101
 102         lmv->cluuid = *cluuid;
 103         lmv->connected = 0;
 104         lmv->exp = exp;
 105
 106         RETURN(0);
 107 }
 108
 109 void lmv_set_timeouts(struct obd_device *obd)
 110 {
 111         struct lmv_tgt_desc *tgts;
 112         struct lmv_obd *lmv;
 113         int i;
 114
 115         lmv = &obd->u.lmv;
 116         if (lmv->server_timeout == 0)
 117                 return;
 118
 119         if (lmv->connected == 0)
 120                 return;
 121
 122         for (i = 0, tgts = lmv->tgts; i < lmv->count; i++, tgts++) {
 123                 if (tgts->exp == NULL)
 124                         continue;
 125                 obd_set_info(tgts->exp, strlen("inter_mds"),
 126                              "inter_mds", 0, NULL);
 127         }
 128 }
 129
 130 int lmv_connect(struct obd_device *obd)
 131 {
 132         struct lmv_obd *lmv = &obd->u.lmv;
 133         struct obd_uuid *cluuid;
 134         struct lmv_tgt_desc *tgts;
 135         struct obd_export *exp;
 136         int rc, i;
 137         ENTRY;
 138
 139         if (lmv->connected)
 140                 RETURN(0);
 141
 142         lmv->connected = 1;
 143         cluuid = &lmv->cluuid;
 144         exp = lmv->exp;
 145         CDEBUG(D_OTHER, "time to connect %s to %s\n",
 146                         cluuid->uuid, obd->obd_name);
 147
 148         for (i = 0, tgts = lmv->tgts; i < lmv->count; i++, tgts++) {
 149                 struct obd_device *tgt_obd;
 150                 struct obd_uuid lmv_osc_uuid = { "LMV_OSC_UUID" };
 151                 struct lustre_handle conn = {0, };
 152
 153                 LASSERT(tgts != NULL);
 154
 155                 tgt_obd = class_find_client_obd(&tgts->uuid, LUSTRE_MDC_NAME,
 156                                                 &obd->obd_uuid);
 157                 if (!tgt_obd) {
 158                         CERROR("Target %s not attached\n", tgts->uuid.uuid);
 159                         GOTO(out_disc, rc = -EINVAL);
 160                 }
 161
 162                 /* for MDS: don't connect to yourself */
 163                 if (obd_uuid_equals(&tgts->uuid, cluuid)) {
 164                         CDEBUG(D_OTHER, "don't connect back to %s\n",
 165                                cluuid->uuid);
 166                         tgts->exp = NULL;
 167                         continue;
 168                 }
 169
 170                 CDEBUG(D_OTHER, "connect to %s(%s) - %s, %s FOR %s\n",
 171                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 172                         tgts->uuid.uuid, obd->obd_uuid.uuid,
 173                         cluuid->uuid);
 174
 175                 if (!tgt_obd->obd_set_up) {
 176                         CERROR("Target %s not set up\n", tgts->uuid.uuid);
 177                         GOTO(out_disc, rc = -EINVAL);
 178                 }
 179
 180                 rc = obd_connect(&conn, tgt_obd, &lmv_osc_uuid);
 181                 if (rc) {
 182                         CERROR("Target %s connect error %d\n",
 183                                 tgts->uuid.uuid, rc);
 184                         GOTO(out_disc, rc);
 185                 }
 186                 tgts->exp = class_conn2export(&conn);
 187
 188                 obd_init_ea_size(tgts->exp, lmv->max_easize,
 189                                         lmv->max_cookiesize);
 190
 191                 rc = obd_register_observer(tgt_obd, obd);
 192                 if (rc) {
 193                         CERROR("Target %s register_observer error %d\n",
 194                                tgts->uuid.uuid, rc);
 195                         obd_disconnect(tgts->exp, 0);
 196                         GOTO(out_disc, rc);
 197                 }
 198
 199                 CDEBUG(D_OTHER, "connected to %s(%s) successfully (%d)\n",
 200                         tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
 201                         atomic_read(&obd->obd_refcount));
 202         }
 203
 204         lmv_set_timeouts(obd);
 205
 206         class_export_put(exp);
 207         RETURN (0);
 208
 209  out_disc:
 210         /* FIXME: cleanup here */
 211         class_disconnect(exp, 0);
 212         RETURN (rc);
 213 }
 214
 215 static int lmv_disconnect(struct obd_export *exp, int flags)
 216 {
 217         struct obd_device *obd = class_exp2obd(exp);
 218         struct lmv_obd *lmv = &obd->u.lmv;
 219         int rc, i;
 220         ENTRY;
 221
 222         if (!lmv->tgts)
 223                 goto out_local;
 224
 225         /* Only disconnect the underlying layers on the final disconnect. */
 226         lmv->refcount--;
 227         if (lmv->refcount != 0)
 228                 goto out_local;
 229
 230         for (i = 0; i < lmv->count; i++) {
 231                 if (lmv->tgts[i].exp == NULL)
 232                         continue;
 233
 234                 if (obd->obd_no_recov) {
 235                         /* Pass it on to our clients.
 236                          * XXX This should be an argument to disconnect,
 237                          * XXX not a back-door flag on the OBD.  Ah well.
 238                          */
 239                         struct obd_device *mdc_obd;
 240                         mdc_obd = class_exp2obd(lmv->tgts[i].exp);
 241                         if (mdc_obd)
 242                                 mdc_obd->obd_no_recov = 1;
 243                 }
 244
 245                 CDEBUG(D_OTHER, "disconnected from %s(%s) successfully\n",
 246                         lmv->tgts[i].exp->exp_obd->obd_name,
 247                         lmv->tgts[i].exp->exp_obd->obd_uuid.uuid);
 248
 249                 obd_register_observer(lmv->tgts[i].exp->exp_obd, NULL);
 250
 251                 rc = obd_disconnect(lmv->tgts[i].exp, flags);
 252                 lmv->tgts[i].exp = NULL;
 253         }
 254
 255  out_local:
 256         /* FIXME: cleanup here */
 257         if (!lmv->connected)
 258                 class_export_put(exp);
 259         rc = class_disconnect(exp, 0);
 260         RETURN(rc);
 261 }
 262
 263 static int lmv_setup(struct obd_device *obd, obd_count len, void *buf)
 264 {
 265         struct lustre_cfg *lcfg = buf;
 266         struct lmv_desc *desc;
 267         struct lmv_obd *lmv = &obd->u.lmv;
 268         struct obd_uuid *uuids;
 269         struct lmv_tgt_desc *tgts;
 270         int i;
 271         int count;
 272         int rc = 0;
 273         ENTRY;
 274
 275         if (lcfg->lcfg_inllen1 < 1) {
 276                 CERROR("LMV setup requires a descriptor\n");
 277                 RETURN(-EINVAL);
 278         }
 279
 280         if (lcfg->lcfg_inllen2 < 1) {
 281                 CERROR("LMV setup requires an OST UUID list\n");
 282                 RETURN(-EINVAL);
 283         }
 284
 285         desc = (struct lmv_desc *)lcfg->lcfg_inlbuf1;
 286         if (sizeof(*desc) > lcfg->lcfg_inllen1) {
 287                 CERROR("descriptor size wrong: %d > %d\n",
 288                        (int)sizeof(*desc), lcfg->lcfg_inllen1);
 289                 RETURN(-EINVAL);
 290         }
 291
 292         count = desc->ld_count;
 293         uuids = (struct obd_uuid *)lcfg->lcfg_inlbuf2;
 294         if (sizeof(*uuids) * count != lcfg->lcfg_inllen2) {
 295                 CERROR("UUID array size wrong: %u * %u != %u\n",
 296                        sizeof(*uuids), count, lcfg->lcfg_inllen2);
 297                 RETURN(-EINVAL);
 298         }
 299
 300         lmv->bufsize = sizeof(struct lmv_tgt_desc) * count;
 301         OBD_ALLOC(lmv->tgts, lmv->bufsize);
 302         if (lmv->tgts == NULL) {
 303                 CERROR("Out of memory\n");
 304                 RETURN(-EINVAL);
 305         }
 306
 307         for (i = 0, tgts = lmv->tgts; i < count; i++, tgts++) {
 308                 tgts->uuid = uuids[i];
 309                 lmv->count++;
 310         }
 311
 312         lmv->max_easize = sizeof(struct ll_fid) * lmv->count
 313                                         + sizeof(struct mea);
 314         lmv->max_cookiesize = 0;
 315
 316         RETURN(rc);
 317 }
 318
 319 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 320                       unsigned long max_age)
 321 {
 322         struct lmv_obd *lmv = &obd->u.lmv;
 323         struct obd_statfs temp;
 324         int rc = 0, i;
 325         ENTRY;
 326         lmv_connect(obd);
 327         for (i = 0; i < lmv->count; i++) {
 328                 rc = obd_statfs(lmv->tgts[i].exp->exp_obd, &temp, max_age);
 329                 if (rc) {
 330                         CERROR("can't stat MDS #%d (%s)\n", i,
 331                                lmv->tgts[i].exp->exp_obd->obd_name);
 332                         RETURN(rc);
 333                 }
 334                 if (i == 0) {
 335                         memcpy(osfs, &temp, sizeof(temp));
 336                 } else {
 337                         osfs->os_bavail += temp.os_bavail;
 338                         osfs->os_blocks += temp.os_blocks;
 339                         osfs->os_ffree += temp.os_ffree;
 340                         osfs->os_files += temp.os_files;
 341                 }
 342         }
 343         RETURN(rc);
 344 }
 345
 346 static int lmv_cleanup(struct obd_device *obd, int flags)
 347 {
 348         struct lmv_obd *lmv = &obd->u.lmv;
 349         ENTRY;
 350         lmv_cleanup_objs(obd);
 351         OBD_FREE(lmv->tgts, lmv->bufsize);
 352         RETURN(0);
 353 }
 354
 355 static int lmv_getstatus(struct obd_export *exp, struct ll_fid *fid)
 356 {
 357         struct obd_device *obd = exp->exp_obd;
 358         struct lmv_obd *lmv = &obd->u.lmv;
 359         int rc;
 360         ENTRY;
 361         lmv_connect(obd);
 362         rc = md_getstatus(lmv->tgts[0].exp, fid);
 363         fid->mds = 0;
 364         RETURN(rc);
 365 }
 366
 367 static int lmv_getattr(struct obd_export *exp, struct ll_fid *fid,
 368                 unsigned long valid, unsigned int ea_size,
 369                 struct ptlrpc_request **request)
 370 {
 371         struct obd_device *obd = exp->exp_obd;
 372         struct lmv_obd *lmv = &obd->u.lmv;
 373         int rc, i = fid->mds;
 374         struct lmv_obj *obj;
 375         ENTRY;
 376         lmv_connect(obd);
 377         obj = lmv_grab_obj(obd, fid, 0);
 378         CDEBUG(D_OTHER, "GETATTR for %lu/%lu/%lu %s\n",
 379                (unsigned long) fid->mds,
 380                (unsigned long) fid->id,
 381                (unsigned long) fid->generation,
 382                obj ? "(splitted)" : "");
 383
 384         LASSERT(fid->mds < lmv->count);
 385         rc = md_getattr(lmv->tgts[i].exp, fid,
 386                              valid, ea_size, request);
 387         if (rc == 0 && obj) {
 388                 /* we have to loop over dirobjs here and gather attrs
 389                  * for all the slaves */
 390 #warning "attrs gathering here"
 391         }
 392         lmv_put_obj(obj);
 393         RETURN(rc);
 394 }
 395
 396 static int lmv_change_cbdata(struct obd_export *exp,
 397                                  struct ll_fid *fid,
 398                                  ldlm_iterator_t it, void *data)
 399 {
 400         struct obd_device *obd = exp->exp_obd;
 401         struct lmv_obd *lmv = &obd->u.lmv;
 402         int rc = 0;
 403         ENTRY;
 404         lmv_connect(obd);
 405         CDEBUG(D_OTHER, "CBDATA for %lu/%lu/%lu\n",
 406                (unsigned long) fid->mds,
 407                (unsigned long) fid->id,
 408                (unsigned long) fid->generation);
 409         LASSERT(fid->mds < lmv->count);
 410         rc = md_change_cbdata(lmv->tgts[fid->mds].exp, fid, it, data);
 411         RETURN(rc);
 412 }
 413
 414 static int lmv_change_cbdata_name(struct obd_export *exp, struct ll_fid *pfid,
 415                                   char *name, int len, struct ll_fid *cfid,
 416                                   ldlm_iterator_t it, void *data)
 417 {
 418         struct obd_device *obd = exp->exp_obd;
 419         struct lmv_obd *lmv = &obd->u.lmv;
 420         struct lmv_obj *obj;
 421         int rc = 0, mds;
 422         ENTRY;
 423         lmv_connect(obd);
 424         LASSERT(pfid->mds < lmv->count);
 425         LASSERT(cfid->mds < lmv->count);
 426         CDEBUG(D_OTHER, "CBDATA for %lu/%lu/%lu:%*s -> %lu/%lu/%lu\n",
 427                (unsigned long) pfid->mds, (unsigned long) pfid->id,
 428                (unsigned long) pfid->generation, len, name,
 429                (unsigned long) cfid->mds, (unsigned long) cfid->id,
 430                (unsigned long) cfid->generation);
 431
 432         /* this is default mds for directory name belongs to */
 433         mds = pfid->mds;
 434         obj = lmv_grab_obj(obd, pfid, 0);
 435         if (obj) {
 436                 /* directory is splitted. look for right mds for this name */
 437                 mds = raw_name2idx(obj->objcount, name, len);
 438                 lmv_put_obj(obj);
 439         }
 440         rc = md_change_cbdata(lmv->tgts[mds].exp, cfid, it, data);
 441         RETURN(rc);
 442 }
 443
 444 static int lmv_valid_attrs(struct obd_export *exp, struct ll_fid *fid)
 445 {
 446         struct obd_device *obd = exp->exp_obd;
 447         struct lmv_obd *lmv = &obd->u.lmv;
 448         int rc = 0;
 449         ENTRY;
 450         lmv_connect(obd);
 451         CDEBUG(D_OTHER, "validate %lu/%lu/%lu\n",
 452                (unsigned long) fid->mds,
 453                (unsigned long) fid->id,
 454                (unsigned long) fid->generation);
 455         LASSERT(fid->mds < lmv->count);
 456         rc = md_valid_attrs(lmv->tgts[fid->mds].exp, fid);
 457         RETURN(rc);
 458 }
 459
 460 int lmv_close(struct obd_export *exp, struct obdo *obdo,
 461                   struct obd_client_handle *och,
 462                   struct ptlrpc_request **request)
 463 {
 464         struct obd_device *obd = exp->exp_obd;
 465         struct lmv_obd *lmv = &obd->u.lmv;
 466         int rc, i = obdo->o_mds;
 467         ENTRY;
 468         lmv_connect(obd);
 469         LASSERT(i < lmv->count);
 470         CDEBUG(D_OTHER, "CLOSE %lu/%lu/%lu\n", (unsigned long) obdo->o_mds,
 471                (unsigned long) obdo->o_id, (unsigned long) obdo->o_generation);
 472         rc = md_close(lmv->tgts[i].exp, obdo, och, request);
 473         RETURN(rc);
 474 }
 475
 476 int lmv_get_mea_and_update_object(struct obd_export *exp, struct ll_fid *fid)
 477 {
 478         struct obd_device *obd = exp->exp_obd;
 479         struct lmv_obd *lmv = &obd->u.lmv;
 480         struct ptlrpc_request *req = NULL;
 481         struct lustre_md md;
 482         int mealen, rc;
 483
 484         md.mea = NULL;
 485         mealen = MEA_SIZE_LMV(lmv);
 486
 487         /* time to update mea of parent fid */
 488         rc = md_getattr(lmv->tgts[fid->mds].exp, fid,
 489                         OBD_MD_FLEASIZE, mealen, &req);
 490         if (rc)
 491                 GOTO(cleanup, rc);
 492         rc = mdc_req2lustre_md(req, 0, NULL, exp, &md);
 493         if (rc)
 494                 GOTO(cleanup, rc);
 495         if (md.mea == NULL)
 496                 GOTO(cleanup, rc = -ENODATA);
 497         rc = lmv_create_obj_from_attrs(exp, fid, md.mea);
 498         obd_free_memmd(exp, (struct lov_stripe_md **) &md.mea);
 499
 500 cleanup:
 501         if (req)
 502                 ptlrpc_req_finished(req);
 503         RETURN(rc);
 504 }
 505
 506 int lmv_create(struct obd_export *exp, struct mdc_op_data *op_data,
 507                    const void *data, int datalen, int mode, __u32 uid,
 508                    __u32 gid, __u64 rdev, struct ptlrpc_request **request)
 509 {
 510         struct obd_device *obd = exp->exp_obd;
 511         struct lmv_obd *lmv = &obd->u.lmv;
 512         struct mds_body *mds_body;
 513         struct lmv_obj *obj;
 514         int rc, mds;
 515         ENTRY;
 516
 517         lmv_connect(obd);
 518 repeat:
 519         obj = lmv_grab_obj(obd, &op_data->fid1, 0);
 520         if (obj) {
 521                 mds = raw_name2idx(obj->objcount, op_data->name,
 522                                         op_data->namelen);
 523                 op_data->fid1 = obj->objs[mds].fid;
 524                 lmv_put_obj(obj);
 525         }
 526
 527         CDEBUG(D_OTHER, "CREATE '%*s' on %lu/%lu/%lu\n",
 528                         op_data->namelen, op_data->name,
 529                         (unsigned long) op_data->fid1.mds,
 530                         (unsigned long) op_data->fid1.id,
 531                         (unsigned long) op_data->fid1.generation);
 532         rc = md_create(lmv->tgts[op_data->fid1.mds].exp, op_data, data,
 533                        datalen, mode, uid, gid, rdev, request);
 534         if (rc == 0) {
 535                 if (*request == NULL)
 536                      RETURN(rc);
 537                 mds_body = lustre_msg_buf((*request)->rq_repmsg, 0,
 538                                           sizeof(*mds_body));
 539                 LASSERT(mds_body != NULL);
 540                 CDEBUG(D_OTHER, "created. id = %lu, generation = %lu, mds = %d\n",
 541                        (unsigned long) mds_body->fid1.id,
 542                        (unsigned long) mds_body->fid1.generation,
 543                        op_data->fid1.mds);
 544                 LASSERT(mds_body->valid & OBD_MD_MDS ||
 545                                 mds_body->mds == op_data->fid1.mds);
 546         } else if (rc == -ERESTART) {
 547                 /* directory got splitted. time to update local object
 548                  * and repeat the request with proper MDS */
 549                 rc = lmv_get_mea_and_update_object(exp, &op_data->fid1);
 550                 if (rc == 0) {
 551                         ptlrpc_req_finished(*request);
 552                         goto repeat;
 553                 }
 554         }
 555         RETURN(rc);
 556 }
 557
 558 int lmv_done_writing(struct obd_export *exp, struct obdo *obdo)
 559 {
 560         struct obd_device *obd = exp->exp_obd;
 561         struct lmv_obd *lmv = &obd->u.lmv;
 562         int rc;
 563         ENTRY;
 564         lmv_connect(obd);
 565         /* FIXME: choose right MDC here */
 566         rc = md_done_writing(lmv->tgts[0].exp, obdo);
 567         RETURN(rc);
 568 }
 569
 570 int lmv_enqueue(struct obd_export *exp, int lock_type,
 571                     struct lookup_intent *it, int lock_mode,
 572                     struct mdc_op_data *data, struct lustre_handle *lockh,
 573                     void *lmm, int lmmsize,
 574                     ldlm_completion_callback cb_completion,
 575                     ldlm_blocking_callback cb_blocking, void *cb_data)
 576 {
 577         struct obd_device *obd = exp->exp_obd;
 578         struct lmv_obd *lmv = &obd->u.lmv;
 579         struct lmv_obj *obj;
 580         int rc, mds;
 581         ENTRY;
 582         lmv_connect(obd);
 583         if (data->namelen) {
 584                 obj = lmv_grab_obj(obd, &data->fid1, 0);
 585                 if (obj) {
 586                         /* directory is splitted. look for
 587                          * right mds for this name */
 588                         mds = raw_name2idx(obj->objcount, data->name,
 589                                                 data->namelen);
 590                         data->fid1 = obj->objs[mds].fid;
 591                         lmv_put_obj(obj);
 592                 }
 593         }
 594         CDEBUG(D_OTHER, "ENQUEUE '%s' on %lu/%lu\n",
 595                LL_IT2STR(it), (unsigned long) data->fid1.id,
 596                (unsigned long) data->fid1.generation);
 597         rc = md_enqueue(lmv->tgts[data->fid1.mds].exp, lock_type, it,
 598                         lock_mode, data, lockh, lmm, lmmsize, cb_completion,
 599                         cb_blocking, cb_data);
 600
 601         RETURN(rc);
 602 }
 603
 604 int lmv_getattr_name(struct obd_export *exp, struct ll_fid *fid,
 605                          char *filename, int namelen, unsigned long valid,
 606                          unsigned int ea_size, struct ptlrpc_request **request)
 607 {
 608         struct obd_device *obd = exp->exp_obd;
 609         struct lmv_obd *lmv = &obd->u.lmv;
 610         struct ll_fid rfid = *fid;
 611         int rc, mds = fid->mds;
 612         struct mds_body *body;
 613         struct lmv_obj *obj;
 614         ENTRY;
 615         lmv_connect(obd);
 616         obj = lmv_grab_obj(obd, fid, 0);
 617         if (obj) {
 618                 /* directory is splitted. look for right mds for this name */
 619                 mds = raw_name2idx(obj->objcount, filename, namelen - 1);
 620                 rfid = obj->objs[mds].fid;
 621                 lmv_put_obj(obj);
 622         }
 623         CDEBUG(D_OTHER, "getattr_name for %*s on %lu/%lu/%lu -> %lu/%lu/%lu\n",
 624                namelen, filename, (unsigned long) fid->mds,
 625                (unsigned long) fid->id, (unsigned long) fid->generation,
 626                (unsigned long) rfid.mds, (unsigned long) rfid.id,
 627                (unsigned long) rfid.generation);
 628         rc = md_getattr_name(lmv->tgts[mds].exp, &rfid, filename, namelen,
 629                                   valid, ea_size, request);
 630         if (rc == 0) {
 631                 /* this could be cross-node reference. in this case all
 632                  * we have right now is mds/ino/generation triple. we'd
 633                  * like to find other attributes */
 634                 body = lustre_msg_buf((*request)->rq_repmsg, 0, sizeof(*body));
 635                 LASSERT(body != NULL);
 636                 if (body->valid & OBD_MD_MDS) {
 637                         struct ptlrpc_request *req = NULL;
 638                         rfid = body->fid1;
 639                         CDEBUG(D_OTHER, "request attrs for %lu/%lu/%lu\n",
 640                                (unsigned long) rfid.mds,
 641                                (unsigned long) rfid.id,
 642                                (unsigned long) rfid.generation);
 643                         rc = md_getattr_name(lmv->tgts[rfid.mds].exp, &rfid,
 644                                              NULL, 1, valid, ea_size, &req);
 645                         ptlrpc_req_finished(*request);
 646                         *request = req;
 647                 }
 648         }
 649         RETURN(rc);
 650 }
 651
 652
 653 /*
 654  * llite passes fid of an target inode in data->fid1 and
 655  * fid of directory in data->fid2
 656  */
 657 int lmv_link(struct obd_export *exp, struct mdc_op_data *data,
 658              struct ptlrpc_request **request)
 659 {
 660         struct obd_device *obd = exp->exp_obd;
 661         struct lmv_obd *lmv = &obd->u.lmv;
 662         struct lmv_obj *obj;
 663         int rc;
 664         ENTRY;
 665         lmv_connect(obd);
 666         if (data->namelen != 0) {
 667                 /* usual link request */
 668                 obj = lmv_grab_obj(obd, &data->fid1, 0);
 669                 if (obj) {
 670                         rc = raw_name2idx(obj->objcount, data->name,
 671                                          data->namelen);
 672                         data->fid1 = obj->objs[rc].fid;
 673                         lmv_put_obj(obj);
 674                 }
 675                 CDEBUG(D_OTHER,"link %u/%u/%u:%*s to %u/%u/%u mds %d\n",
 676                        (unsigned) data->fid2.mds, (unsigned) data->fid2.id,
 677                        (unsigned) data->fid2.generation, data->namelen,
 678                        data->name, (unsigned) data->fid1.mds,
 679                        (unsigned) data->fid1.id,
 680                        (unsigned) data->fid1.generation, data->fid1.mds);
 681         } else {
 682                 /* request from MDS to acquire i_links for inode by fid1 */
 683                 CDEBUG(D_OTHER, "inc i_nlinks for %u/%u/%u\n",
 684                        (unsigned) data->fid1.mds, (unsigned) data->fid1.id,
 685                        (unsigned) data->fid1.generation);
 686         }
 687
 688         rc = md_link(lmv->tgts[data->fid1.mds].exp, data, request);
 689         RETURN(rc);
 690 }
 691
 692 int lmv_rename(struct obd_export *exp, struct mdc_op_data *data,
 693                const char *old, int oldlen, const char *new, int newlen,
 694                struct ptlrpc_request **request)
 695 {
 696         struct obd_device *obd = exp->exp_obd;
 697         struct lmv_obd *lmv = &obd->u.lmv;
 698         struct lmv_obj *obj;
 699         int rc, mds;
 700         ENTRY;
 701
 702         CDEBUG(D_OTHER, "rename %*s in %lu/%lu/%lu to %*s in %lu/%lu/%lu\n",
 703                oldlen, old, (unsigned long) data->fid1.mds,
 704                (unsigned long) data->fid1.id,
 705                (unsigned long) data->fid1.generation,
 706                newlen, new, (unsigned long) data->fid2.mds,
 707                (unsigned long) data->fid2.id,
 708                (unsigned long) data->fid2.generation);
 709         if (!fid_equal(&data->fid1, &data->fid2))
 710                 CWARN("cross-node rename %lu/%lu/%lu:%*s to %lu/%lu/%lu:%*s\n",
 711                       (unsigned long) data->fid1.mds,
 712                       (unsigned long) data->fid1.id,
 713                       (unsigned long) data->fid1.generation, oldlen, old,
 714                       (unsigned long) data->fid2.mds,
 715                       (unsigned long) data->fid2.id,
 716                       (unsigned long) data->fid2.generation, newlen, new);
 717
 718         lmv_connect(obd);
 719
 720         if (oldlen == 0) {
 721                 /* MDS with old dir entry is asking another MDS
 722                  * to create name there */
 723                 CDEBUG(D_OTHER,
 724                        "create %*s(%d/%d) in %lu/%lu/%lu pointing to %lu/%lu/%lu\n",
 725                        newlen, new, oldlen, newlen,
 726                        (unsigned long) data->fid2.mds,
 727                        (unsigned long) data->fid2.id,
 728                        (unsigned long) data->fid2.generation,
 729                        (unsigned long) data->fid1.mds,
 730                        (unsigned long) data->fid1.id,
 731                        (unsigned long) data->fid1.generation);
 732                 mds = data->fid2.mds;
 733                 goto request;
 734         }
 735
 736         obj = lmv_grab_obj(obd, &data->fid1, 0);
 737         if (obj) {
 738                 /* directory is already splitted, so we have to forward
 739                  * request to the right MDS */
 740                 mds = raw_name2idx(obj->objcount, old, oldlen);
 741                 data->fid1 = obj->objs[mds].fid;
 742                 CDEBUG(D_OTHER, "forward to MDS #%u (%lu/%lu/%lu)\n", mds,
 743                        (unsigned long) obj->objs[mds].fid.mds,
 744                        (unsigned long) obj->objs[mds].fid.id,
 745                        (unsigned long) obj->objs[mds].fid.generation);
 746         }
 747         lmv_put_obj(obj);
 748
 749         obj = lmv_grab_obj(obd, &data->fid2, 0);
 750         if (obj) {
 751                 /* directory is already splitted, so we have to forward
 752                  * request to the right MDS */
 753                 mds = raw_name2idx(obj->objcount, new, newlen);
 754                 data->fid2 = obj->objs[mds].fid;
 755                 CDEBUG(D_OTHER, "forward to MDS #%u (%lu/%lu/%lu)\n", mds,
 756                        (unsigned long) obj->objs[mds].fid.mds,
 757                        (unsigned long) obj->objs[mds].fid.id,
 758                        (unsigned long) obj->objs[mds].fid.generation);
 759         }
 760         lmv_put_obj(obj);
 761
 762         mds = data->fid1.mds;
 763
 764 request:
 765         rc = md_rename(lmv->tgts[mds].exp, data, old, oldlen,
 766                             new, newlen, request);
 767         RETURN(rc);
 768 }
 769
 770 int lmv_setattr(struct obd_export *exp, struct mdc_op_data *data,
 771                 struct iattr *iattr, void *ea, int ealen, void *ea2, int ea2len,
 772                 struct ptlrpc_request **request)
 773 {
 774         struct obd_device *obd = exp->exp_obd;
 775         struct lmv_obd *lmv = &obd->u.lmv;
 776         int rc = 0, i = data->fid1.mds;
 777         struct ptlrpc_request *req;
 778         struct mds_body *mds_body;
 779         struct lmv_obj *obj;
 780         ENTRY;
 781         lmv_connect(obd);
 782         obj = lmv_grab_obj(obd, &data->fid1, 0);
 783         CDEBUG(D_OTHER, "SETATTR for %lu/%lu/%lu, valid 0x%x%s\n",
 784                (unsigned long) data->fid1.mds,
 785                (unsigned long) data->fid1.id,
 786                (unsigned long) data->fid1.generation, iattr->ia_valid,
 787                obj ? ", splitted" : "");
 788         if (obj) {
 789                 for (i = 0; i < obj->objcount; i++) {
 790                         data->fid1 = obj->objs[i].fid;
 791                         rc = md_setattr(lmv->tgts[i].exp, data, iattr, ea,
 792                                         ealen, ea2, ea2len, &req);
 793                         LASSERT(rc == 0);
 794                         if (fid_equal(&obj->fid, &obj->objs[i].fid)) {
 795                                 /* this is master object and this request
 796                                  * should be returned back to llite */
 797                                 *request = req;
 798                         } else {
 799                                 ptlrpc_req_finished(req);
 800                         }
 801                 }
 802                 lmv_put_obj(obj);
 803         } else {
 804                 LASSERT(data->fid1.mds < lmv->count);
 805                 rc = md_setattr(lmv->tgts[i].exp, data, iattr, ea, ealen,
 806                                 ea2, ea2len, request);
 807                 if (rc == 0) {
 808                         mds_body = lustre_msg_buf((*request)->rq_repmsg, 0,
 809                                         sizeof(*mds_body));
 810                         LASSERT(mds_body != NULL);
 811                         LASSERT(mds_body->mds == i);
 812                 }
 813         }
 814         RETURN(rc);
 815 }
 816
 817 int lmv_sync(struct obd_export *exp, struct ll_fid *fid,
 818              struct ptlrpc_request **request)
 819 {
 820         struct obd_device *obd = exp->exp_obd;
 821         struct lmv_obd *lmv = &obd->u.lmv;
 822         int rc;
 823         ENTRY;
 824         lmv_connect(obd);
 825         rc = md_sync(lmv->tgts[0].exp, fid, request);
 826         RETURN(rc);
 827 }
 828
 829 int lmv_dirobj_blocking_ast(struct ldlm_lock *lock,
 830                             struct ldlm_lock_desc *desc, void *data, int flag)
 831 {
 832         struct lustre_handle lockh;
 833         struct lmv_obj *obj;
 834         int rc;
 835         ENTRY;
 836
 837         switch (flag) {
 838         case LDLM_CB_BLOCKING:
 839                 ldlm_lock2handle(lock, &lockh);
 840                 rc = ldlm_cli_cancel(&lockh);
 841                 if (rc < 0) {
 842                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 843                         RETURN(rc);
 844                 }
 845                 break;
 846         case LDLM_CB_CANCELING:
 847                 /* time to drop cached attrs for dirobj */
 848                 obj = lock->l_ast_data;
 849                 if (!obj)
 850                         break;
 851
 852                 CDEBUG(D_OTHER, "cancel %s on %lu/%lu, master %lu/%lu/%lu\n",
 853                        lock->l_resource->lr_name.name[3] == 1 ?
 854                                 "LOOKUP" : "UPDATE",
 855                        (unsigned long) lock->l_resource->lr_name.name[0],
 856                        (unsigned long) lock->l_resource->lr_name.name[1],
 857                        (unsigned long) obj->fid.mds,
 858                        (unsigned long) obj->fid.id,
 859                        (unsigned long) obj->fid.generation);
 860                 break;
 861         default:
 862                 LBUG();
 863         }
 864         RETURN(0);
 865 }
 866
 867 void lmv_remove_dots(struct page *page)
 868 {
 869         char *kaddr = page_address(page);
 870         unsigned limit = PAGE_CACHE_SIZE;
 871         unsigned offs, rec_len;
 872         struct ext2_dir_entry_2 *p;
 873
 874         for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
 875                 p = (struct ext2_dir_entry_2 *)(kaddr + offs);
 876                 rec_len = le16_to_cpu(p->rec_len);
 877
 878                 if ((p->name_len == 1 && p->name[0] == '.') ||
 879                     (p->name_len == 2 && p->name[0] == '.' && p->name[1] == '.'))
 880                         p->inode = 0;
 881         }
 882 }
 883
 884 int lmv_readpage(struct obd_export *exp, struct ll_fid *mdc_fid,
 885                  __u64 offset, struct page *page,
 886                  struct ptlrpc_request **request)
 887 {
 888         struct obd_device *obd = exp->exp_obd;
 889         struct lmv_obd *lmv = &obd->u.lmv;
 890         struct ll_fid rfid = *mdc_fid;
 891         struct lmv_obj *obj;
 892         int rc, i;
 893         ENTRY;
 894         lmv_connect(obd);
 895
 896         LASSERT(mdc_fid->mds < lmv->count);
 897         CDEBUG(D_OTHER, "READPAGE at %llu from %lu/%lu/%lu\n",
 898                offset, (unsigned long) rfid.mds,
 899                (unsigned long) rfid.id,
 900                (unsigned long) rfid.generation);
 901
 902         obj = lmv_grab_obj(obd, mdc_fid, 0);
 903         if (obj) {
 904                 /* find dirobj containing page with requested offset */
 905                 /* FIXME: what about protecting cached attrs here? */
 906                 for (i = 0; i < obj->objcount; i++) {
 907                         if (offset < obj->objs[i].size)
 908                                 break;
 909                         offset -= obj->objs[i].size;
 910                 }
 911                 rfid = obj->objs[i].fid;
 912                 CDEBUG(D_OTHER, "forward to %lu/%lu/%lu with offset %lu\n",
 913                        (unsigned long) rfid.mds,
 914                        (unsigned long) rfid.id,
 915                        (unsigned long) rfid.generation,
 916                        (unsigned long) offset);
 917         }
 918         rc = md_readpage(lmv->tgts[rfid.mds].exp, &rfid, offset, page, request);
 919         if (rc == 0 && !fid_equal(&rfid, mdc_fid)) {
 920                 /* this page isn't from master object. to avoid
 921                  * ./.. duplication in directory, we have to remove them
 922                  * from all slave objects */
 923                 lmv_remove_dots(page);
 924         }
 925
 926         lmv_put_obj(obj);
 927
 928         RETURN(rc);
 929 }
 930
 931 int lmv_unlink(struct obd_export *exp, struct mdc_op_data *data,
 932                struct ptlrpc_request **request)
 933 {
 934         struct obd_device *obd = exp->exp_obd;
 935         struct lmv_obd *lmv = &obd->u.lmv;
 936         int rc, i = 0;
 937         ENTRY;
 938         lmv_connect(obd);
 939         if (data->namelen != 0) {
 940                 struct lmv_obj *obj;
 941                 obj = lmv_grab_obj(obd, &data->fid1, 0);
 942                 if (obj) {
 943                         i = raw_name2idx(obj->objcount, data->name,
 944                                          data->namelen);
 945                         data->fid1 = obj->objs[i].fid;
 946                         lmv_put_obj(obj);
 947                 }
 948                 CDEBUG(D_OTHER, "unlink '%*s' in %lu/%lu/%lu -> %u\n",
 949                        data->namelen, data->name,
 950                        (unsigned long) data->fid1.mds,
 951                        (unsigned long) data->fid1.id,
 952                        (unsigned long) data->fid1.generation, i);
 953         } else {
 954                 CDEBUG(D_OTHER, "drop i_nlink on %lu/%lu/%lu\n",
 955                        (unsigned long) data->fid1.mds,
 956                        (unsigned long) data->fid1.id,
 957                        (unsigned long) data->fid1.generation);
 958         }
 959         rc = md_unlink(lmv->tgts[data->fid1.mds].exp, data, request);
 960         RETURN(rc);
 961 }
 962
 963 struct obd_device *lmv_get_real_obd(struct obd_export *exp,
 964                                         char *name, int len)
 965 {
 966         struct obd_device *obd = exp->exp_obd;
 967         struct lmv_obd *lmv = &obd->u.lmv;
 968         ENTRY;
 969         lmv_connect(obd);
 970         obd = lmv->tgts[0].exp->exp_obd;
 971         EXIT;
 972         return obd;
 973 }
 974
 975 int lmv_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
 976 {
 977         struct obd_device *obd = exp->exp_obd;
 978         struct lmv_obd *lmv = &obd->u.lmv;
 979         int i, rc = 0, change = 0;
 980         ENTRY;
 981
 982         if (lmv->max_easize < easize) {
 983                 lmv->max_easize = easize;
 984                 change = 1;
 985         }
 986         if (lmv->max_cookiesize < cookiesize) {
 987                 lmv->max_cookiesize = cookiesize;
 988                 change = 1;
 989         }
 990         if (change == 0)
 991                 RETURN(0);
 992
 993         if (lmv->connected == 0)
 994                 RETURN(0);
 995
 996         /* FIXME: error handling? */
 997         for (i = 0; i < lmv->count; i++)
 998                 rc = obd_init_ea_size(lmv->tgts[i].exp, easize, cookiesize);
 999         RETURN(rc);
1000 }
1001
1002 int lmv_obd_create_single(struct obd_export *exp, struct obdo *oa,
1003                           struct lov_stripe_md **ea, struct obd_trans_info *oti)
1004 {
1005         struct obd_device *obd = exp->exp_obd;
1006         struct lmv_obd *lmv = &obd->u.lmv;
1007         struct lov_stripe_md obj_md;
1008         struct lov_stripe_md *obj_mdp = &obj_md;
1009         int rc = 0;
1010         ENTRY;
1011         lmv_connect(obd);
1012
1013         LASSERT(ea == NULL);
1014         LASSERT(oa->o_mds < lmv->count);
1015
1016         rc = obd_create(lmv->tgts[oa->o_mds].exp, oa, &obj_mdp, oti);
1017         LASSERT(rc == 0);
1018
1019         RETURN(rc);
1020 }
1021
1022 /*
1023  * to be called from MDS only
1024  */
1025 int lmv_obd_create(struct obd_export *exp, struct obdo *oa,
1026                struct lov_stripe_md **ea, struct obd_trans_info *oti)
1027 {
1028         struct obd_device *obd = exp->exp_obd;
1029         struct lmv_obd *lmv = &obd->u.lmv;
1030         struct mea *mea;
1031         int i, c, rc = 0;
1032         struct ll_fid mfid;
1033         ENTRY;
1034         lmv_connect(obd);
1035
1036         LASSERT(oa != NULL);
1037
1038         if (ea == NULL) {
1039                 rc = lmv_obd_create_single(exp, oa, NULL, oti);
1040                 RETURN(rc);
1041         }
1042
1043         if (*ea == NULL) {
1044                 rc = obd_alloc_diskmd(exp, (struct lov_mds_md **) ea);
1045                 LASSERT(*ea != NULL);
1046         }
1047
1048         mea = (struct mea *) *ea;
1049         mfid.id = oa->o_id;
1050         mfid.generation = oa->o_generation;
1051         rc = 0;
1052         if (!mea->mea_count || mea->mea_count > lmv->count)
1053                 mea->mea_count = lmv->count;
1054
1055         mea->mea_master = -1;
1056
1057         /* FIXME: error handling? */
1058         for (i = 0, c = 0; c < mea->mea_count && i < lmv->count; i++) {
1059                 struct lov_stripe_md obj_md;
1060                 struct lov_stripe_md *obj_mdp = &obj_md;
1061
1062                 if (lmv->tgts[i].exp == NULL) {
1063                         /* this is master MDS */
1064                         mea->mea_fids[c].id = mfid.id;
1065                         mea->mea_fids[c].generation = mfid.generation;
1066                         mea->mea_fids[c].mds = i;
1067                         mea->mea_master = i;
1068                         c++;
1069                         continue;
1070                 }
1071
1072                 /* "Master" MDS should always be part of stripped dir, so
1073                    scan for it */
1074                 if (mea->mea_master == -1 && c == mea->mea_count - 1)
1075                         continue;
1076
1077                 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLTYPE | OBD_MD_FLMODE
1078                                 | OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLID;
1079
1080                 rc = obd_create(lmv->tgts[c].exp, oa, &obj_mdp, oti);
1081                 /* FIXME: error handling here */
1082                 LASSERT(rc == 0);
1083
1084                 mea->mea_fids[c].id = oa->o_id;
1085                 mea->mea_fids[c].generation = oa->o_generation;
1086                 mea->mea_fids[c].mds = i;
1087                 c++;
1088                 CDEBUG(D_OTHER, "dirobj at mds %d: "LPU64"/%u\n",
1089                        i, oa->o_id, oa->o_generation);
1090         }
1091         LASSERT(c == mea->mea_count);
1092         CDEBUG(D_OTHER, "%d dirobjects created\n", (int) mea->mea_count);
1093
1094         RETURN(rc);
1095 }
1096
1097 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
1098                            void *key, __u32 *vallen, void *val)
1099 {
1100         struct obd_device *obd;
1101         struct lmv_obd *lmv;
1102         ENTRY;
1103
1104         obd = class_exp2obd(exp);
1105         if (obd == NULL) {
1106                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1107                        exp->exp_handle.h_cookie);
1108                 RETURN(-EINVAL);
1109         }
1110
1111         lmv = &obd->u.lmv;
1112         if (keylen == 6 && memcmp(key, "mdsize", 6) == 0) {
1113                 __u32 *mdsize = val;
1114                 *vallen = sizeof(__u32);
1115                 *mdsize = sizeof(struct ll_fid) * lmv->count
1116                                 + sizeof(struct mea);
1117                 RETURN(0);
1118         } else if (keylen == 6 && memcmp(key, "mdsnum", 6) == 0) {
1119                 struct obd_uuid *cluuid = &lmv->cluuid;
1120                 struct lmv_tgt_desc *tgts;
1121                 __u32 *mdsnum = val;
1122                 int i;
1123
1124                 for (i = 0, tgts = lmv->tgts; i < lmv->count; i++, tgts++) {
1125                         if (obd_uuid_equals(&tgts->uuid, cluuid)) {
1126                                 *vallen = sizeof(__u32);
1127                                 *mdsnum = i;
1128                                 RETURN(0);
1129                         }
1130                 }
1131                 LASSERT(0);
1132         }
1133
1134         CDEBUG(D_IOCTL, "invalid key\n");
1135         RETURN(-EINVAL);
1136 }
1137
1138 int lmv_set_info(struct obd_export *exp, obd_count keylen,
1139                  void *key, obd_count vallen, void *val)
1140 {
1141         struct obd_device *obd;
1142         struct lmv_obd *lmv;
1143         ENTRY;
1144
1145         obd = class_exp2obd(exp);
1146         if (obd == NULL) {
1147                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1148                        exp->exp_handle.h_cookie);
1149                 RETURN(-EINVAL);
1150         }
1151         lmv = &obd->u.lmv;
1152
1153         if (keylen >= strlen("client") && strcmp(key, "client") == 0) {
1154                 struct lmv_tgt_desc *tgts;
1155                 int i, rc;
1156
1157                 lmv_connect(obd);
1158                 for (i = 0, tgts = lmv->tgts; i < lmv->count; i++, tgts++) {
1159                         rc = obd_set_info(tgts->exp, keylen, key, vallen, val);
1160                         if (rc)
1161                                 RETURN(rc);
1162                 }
1163                 RETURN(0);
1164         } else if (keylen >= strlen("inter_mds") && strcmp(key, "inter_mds") == 0) {
1165                 lmv->server_timeout = 1;
1166                 lmv_set_timeouts(obd);
1167                 RETURN(0);
1168         }
1169
1170         RETURN(-EINVAL);
1171 }
1172
1173 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
1174                struct lov_stripe_md *lsm)
1175 {
1176         struct obd_device *obd = class_exp2obd(exp);
1177         struct lmv_obd *lmv = &obd->u.lmv;
1178         int mea_size;
1179         ENTRY;
1180
1181         mea_size = sizeof(struct ll_fid) * lmv->count + sizeof(struct mea);
1182         if (!lmmp)
1183                 RETURN(mea_size);
1184
1185         if (*lmmp && !lsm) {
1186                 OBD_FREE(*lmmp, mea_size);
1187                 *lmmp = NULL;
1188                 RETURN(0);
1189         }
1190
1191         if (!*lmmp) {
1192                 OBD_ALLOC(*lmmp, mea_size);
1193                 if (!*lmmp)
1194                         RETURN(-ENOMEM);
1195         }
1196
1197         if (!lsm)
1198                 RETURN(mea_size);
1199
1200 #warning "MEA packing/convertation must be here! -bzzz"
1201         memcpy(*lmmp, lsm, mea_size);
1202         RETURN(mea_size);
1203 }
1204
1205 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **mem_tgt,
1206                         struct lov_mds_md *disk_src, int mdsize)
1207 {
1208         struct obd_device *obd = class_exp2obd(exp);
1209         struct lmv_obd *lmv = &obd->u.lmv;
1210         struct mea **tmea = (struct mea **) mem_tgt;
1211         struct mea *mea = (void *) disk_src;
1212         int mea_size;
1213         ENTRY;
1214
1215         mea_size = sizeof(struct ll_fid) * lmv->count + sizeof(struct mea);
1216         if (mem_tgt == NULL)
1217                 return mea_size;
1218
1219         if (*mem_tgt != NULL && disk_src == NULL) {
1220                 OBD_FREE(*tmea, mea_size);
1221                 RETURN(0);
1222         }
1223
1224         LASSERT(mea_size == mdsize);
1225
1226         OBD_ALLOC(*tmea, mea_size);
1227         /* FIXME: error handling here */
1228         LASSERT(*tmea != NULL);
1229
1230         if (!disk_src)
1231                 RETURN(mea_size);
1232
1233 #warning "MEA unpacking/convertation must be here! -bzzz"
1234         memcpy(*tmea, mea, mdsize);
1235         RETURN(mea_size);
1236 }
1237
1238 int lmv_brw(int rw, struct obd_export *exp, struct obdo *oa,
1239                 struct lov_stripe_md *ea, obd_count oa_bufs,
1240                 struct brw_page *pgarr, struct obd_trans_info *oti)
1241 {
1242         struct obd_device *obd = exp->exp_obd;
1243         struct lmv_obd *lmv = &obd->u.lmv;
1244         struct mea *mea = (struct mea *) ea;
1245         int err;
1246
1247         LASSERT(oa != NULL);
1248         LASSERT(ea != NULL);
1249         LASSERT(pgarr != NULL);
1250         LASSERT(oa->o_mds < lmv->count);
1251
1252         oa->o_gr = mea->mea_fids[oa->o_mds].generation;
1253         oa->o_id = mea->mea_fids[oa->o_mds].id;
1254         oa->o_valid =  OBD_MD_FLID | OBD_MD_FLGROUP;
1255         err = obd_brw(rw, lmv->tgts[oa->o_mds].exp, oa,
1256                         NULL, oa_bufs, pgarr, oti);
1257         RETURN(err);
1258 }
1259
1260 struct obd_ops lmv_obd_ops = {
1261         o_owner:                THIS_MODULE,
1262         o_attach:               lmv_attach,
1263         o_detach:               lmv_detach,
1264         o_setup:                lmv_setup,
1265         o_cleanup:              lmv_cleanup,
1266         o_connect:              lmv_connect_fake,
1267         o_disconnect:           lmv_disconnect,
1268         o_statfs:               lmv_statfs,
1269         o_get_info:             lmv_get_info,
1270         o_set_info:             lmv_set_info,
1271         o_create:               lmv_obd_create,
1272         o_packmd:               lmv_packmd,
1273         o_unpackmd:             lmv_unpackmd,
1274         o_brw:                  lmv_brw,
1275         o_init_ea_size:         lmv_init_ea_size,
1276 };
1277
1278 struct md_ops lmv_md_ops = {
1279         m_getstatus:            lmv_getstatus,
1280         m_getattr:              lmv_getattr,
1281         m_change_cbdata:        lmv_change_cbdata,
1282         m_change_cbdata_name:   lmv_change_cbdata_name,
1283         m_close:                lmv_close,
1284         m_create:               lmv_create,
1285         m_done_writing:         lmv_done_writing,
1286         m_enqueue:              lmv_enqueue,
1287         m_getattr_name:         lmv_getattr_name,
1288         m_intent_lock:          lmv_intent_lock,
1289         m_link:                 lmv_link,
1290         m_rename:               lmv_rename,
1291         m_setattr:              lmv_setattr,
1292         m_sync:                 lmv_sync,
1293         m_readpage:             lmv_readpage,
1294         m_unlink:               lmv_unlink,
1295         m_get_real_obd:         lmv_get_real_obd,
1296         m_valid_attrs:          lmv_valid_attrs,
1297 };
1298
1299 //#ifndef LPROCFS
1300 static struct lprocfs_vars lprocfs_module_vars[] = { {0} };
1301 static struct lprocfs_vars lprocfs_obd_vars[] = { {0} };
1302 //#else
1303 LPROCFS_INIT_VARS(lmv, lprocfs_module_vars, lprocfs_obd_vars)
1304
1305 int __init lmv_init(void)
1306 {
1307         struct lprocfs_static_vars lvars;
1308         int rc;
1309
1310         lprocfs_init_vars(lmv, &lvars);
1311         rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
1312                                  lvars.module_vars, OBD_LMV_DEVICENAME);
1313         RETURN(rc);
1314 }
1315
1316 static void lmv_exit(void)
1317 {
1318         class_unregister_type(OBD_LMV_DEVICENAME);
1319 }
1320
1321 #ifdef __KERNEL__
1322 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1323 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
1324 MODULE_LICENSE("GPL");
1325
1326 module_init(lmv_init);
1327 module_exit(lmv_exit);
1328 #endif
1329