lustre/cobd/cache_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 Cluster File Systems, Inc. <info@clusterfs.com>
   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 #define DEBUG_SUBSYSTEM S_COBD
  23
  24 #include <linux/version.h>
  25 #include <linux/init.h>
  26 #include <linux/obd_support.h>
  27 #include <linux/lustre_lib.h>
  28 #include <linux/lustre_net.h>
  29 #include <linux/lustre_idl.h>
  30 #include <linux/lustre_log.h>
  31 #include <linux/lustre_mds.h>
  32 #include <linux/obd_class.h>
  33 #include <linux/obd_cache.h>
  34 #include <linux/obd_lmv.h>
  35 #include <linux/obd_lov.h>
  36
  37 static int cobd_attach(struct obd_device *obd,
  38                        obd_count len, void *buf)
  39 {
  40         struct lprocfs_static_vars lvars;
  41         int rc = 0;
  42         ENTRY;
  43
  44         lprocfs_init_vars(cobd, &lvars);
  45         rc = lprocfs_obd_attach(obd, lvars.obd_vars);
  46
  47         RETURN(rc);
  48 }
  49
  50 static int cobd_detach(struct obd_device *obd)
  51 {
  52         ENTRY;
  53         RETURN(lprocfs_obd_detach(obd));
  54 }
  55
  56 static int cobd_setup(struct obd_device *obd, obd_count len, void *buf)
  57 {
  58         struct lustre_cfg *lcfg = (struct lustre_cfg *)buf;
  59         int inst_len = 0, mname_len = 0, cname_len = 0;
  60         struct obd_device *master_obd, *cache_obd;
  61         struct cache_obd  *cobd = &obd->u.cobd;
  62         struct lustre_handle conn = { 0 };
  63         int rc = 0;
  64         ENTRY;
  65
  66         sema_init(&cobd->sem, 1);
  67
  68         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
  69             lustre_cfg_buf(lcfg, 1) == NULL) {
  70                 CERROR("%s: setup requires master device name\n",
  71                        obd->obd_name);
  72                 RETURN(-EINVAL);
  73         }
  74
  75         if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1 ||
  76             lustre_cfg_buf(lcfg, 2) == NULL) {
  77                 CERROR("%s: setup requires cache device name\n",
  78                        obd->obd_name);
  79                 RETURN(-EINVAL);
  80         }
  81         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 3);
  82
  83         if (inst_len) {
  84                 LASSERT(lustre_cfg_buf(lcfg, 3) != NULL);
  85                 mname_len = LUSTRE_CFG_BUFLEN(lcfg, 1) + inst_len;
  86                 cname_len = LUSTRE_CFG_BUFLEN(lcfg, 2) + inst_len;
  87         } else {
  88                 mname_len = LUSTRE_CFG_BUFLEN(lcfg, 1);
  89                 cname_len = LUSTRE_CFG_BUFLEN(lcfg, 2);
  90         }
  91
  92         /* get the cache obd name and master name */
  93         OBD_ALLOC(cobd->master_name, mname_len);
  94         if (!cobd->master_name)
  95                 RETURN(-ENOMEM);
  96         if(inst_len)
  97                 sprintf(cobd->master_name, "%s-%s", lustre_cfg_string(lcfg, 1),
  98                         lustre_cfg_string(lcfg, 3));
  99         else
 100                 sprintf(cobd->master_name, "%s", lustre_cfg_string(lcfg, 1));
 101
 102         OBD_ALLOC(cobd->cache_name, cname_len);
 103         if (!cobd->cache_name) {
 104                 OBD_FREE(cobd->master_name, mname_len);
 105                 RETURN(-ENOMEM);
 106         }
 107         if (inst_len)
 108                 sprintf(cobd->cache_name, "%s-%s", lustre_cfg_string(lcfg, 2),
 109                         lustre_cfg_string(lcfg, 3));
 110         else
 111                 sprintf(cobd->cache_name, "%s", lustre_cfg_string(lcfg, 2));
 112
 113         CDEBUG(D_INFO, "master name %s cache name %s\n", cobd->master_name,
 114                cobd->cache_name);
 115
 116         /* getting master obd */
 117         master_obd = class_name2obd(cobd->master_name);
 118         if (!master_obd) {
 119                 CERROR("can't find master obd by name %s\n",
 120                        cobd->master_name);
 121                 GOTO(put_names, rc = -EINVAL);
 122         }
 123
 124         /* connecting master */
 125         memset(&conn, 0, sizeof(conn));
 126         rc = class_connect(&conn, master_obd, &obd->obd_uuid);
 127         if (rc)
 128                GOTO(put_names, rc);
 129
 130         cobd->master_exp = class_conn2export(&conn);
 131
 132         /* getting cache obd */
 133         cache_obd = class_name2obd(cobd->cache_name);
 134         if (!cache_obd) {
 135                 class_disconnect(cobd->master_exp, 0);
 136                 CERROR("can't find cache obd by name %s\n",
 137                        cobd->cache_name);
 138                 GOTO(put_names, rc = -EINVAL);
 139         }
 140
 141         /* connecting cache */
 142         memset(&conn, 0, sizeof(conn));
 143         rc = class_connect(&conn, cache_obd, &obd->obd_uuid);
 144         if (rc) {
 145                 class_disconnect(cobd->master_exp, 0);
 146                 GOTO(put_names, rc);
 147         }
 148         cobd->cache_exp = class_conn2export(&conn);
 149
 150         /* default set cache on, but nothins is realy connected yet, will be
 151          * done in cobd_connect() time. */
 152         cobd->cache_on = 1;
 153
 154         /* nothing is connected, make exports reflect this state to not confuse
 155          * cobd_switch() later. */
 156         cobd->cache_real_exp = NULL;
 157         cobd->master_real_exp = NULL;
 158
 159         EXIT;
 160 put_names:
 161         if (rc) {
 162                 if (cobd->master_name) {
 163                         OBD_FREE(cobd->master_name, LUSTRE_CFG_BUFLEN(lcfg, 1));
 164                         cobd->master_name = NULL;
 165                 }
 166                 if (cobd->cache_name) {
 167                         OBD_FREE(cobd->cache_name, LUSTRE_CFG_BUFLEN(lcfg, 2));
 168                         cobd->cache_name = NULL;
 169                 }
 170         }
 171         return rc;
 172 }
 173
 174 static int cobd_cleanup(struct obd_device *obd, int flags)
 175 {
 176         struct cache_obd  *cobd = &obd->u.cobd;
 177         int rc = 0;
 178         ENTRY;
 179
 180         if (!list_empty(&obd->obd_exports))
 181                 RETURN(-EBUSY);
 182
 183         if (cobd->cache_name)
 184                 OBD_FREE(cobd->cache_name,
 185                          strlen(cobd->cache_name) + 1);
 186         if (cobd->master_name)
 187                 OBD_FREE(cobd->master_name,
 188                          strlen(cobd->master_name) + 1);
 189
 190         rc = class_disconnect(cobd->master_exp, flags);
 191         if (rc) {
 192                 CERROR("error disconnecting master, err %d\n",
 193                        rc);
 194         }
 195         rc = class_disconnect(cobd->cache_exp, flags);
 196         if (rc) {
 197                 CERROR("error disconnecting master, err %d\n",
 198                        rc);
 199         }
 200
 201         RETURN(0);
 202 }
 203
 204 static inline struct obd_export *
 205 cobd_get_exp(struct obd_device *obd)
 206 {
 207         struct cache_obd *cobd = &obd->u.cobd;
 208         ENTRY;
 209
 210         if (cobd->cache_on) {
 211                 CDEBUG(D_TRACE, "get cache exp %p \n", cobd->cache_exp);
 212                 if (cobd->cache_real_exp)
 213                         RETURN(cobd->cache_real_exp);
 214                 RETURN(cobd->cache_exp);
 215         }
 216
 217         CDEBUG(D_TRACE, "get master exp %p \n", cobd->master_exp);
 218         if (cobd->master_real_exp)
 219                 RETURN(cobd->master_real_exp);
 220         RETURN(cobd->master_exp);
 221 }
 222
 223 static int cobd_init_dt_desc(struct obd_device *obd)
 224 {
 225         struct cache_obd *cobd = &obd->u.cobd;
 226         struct obd_export *cobd_exp;
 227         __u32 valsize;
 228         int rc = 0;
 229         ENTRY;
 230
 231         valsize = sizeof(cobd->dt_desc);
 232         memset(&cobd->dt_desc, 0, sizeof(cobd->dt_desc));
 233
 234         cobd_exp = cobd_get_exp(obd);
 235         rc = obd_get_info(cobd_exp, strlen("lovdesc") + 1,
 236                           "lovdesc", &valsize, &cobd->dt_desc);
 237         RETURN(rc);
 238 }
 239
 240 static int cobd_init_ea_size(struct obd_device *obd)
 241 {
 242         int rc = 0, tgt_count, easize, cookiesize;
 243         struct cache_obd *cobd = &obd->u.cobd;
 244         struct obd_export *cobd_exp;
 245         ENTRY;
 246
 247         tgt_count = cobd->dt_desc.ld_tgt_count;
 248
 249         /* no EA setup is needed as there is single OST with no LOV */
 250         if (tgt_count == 0)
 251                 RETURN(0);
 252
 253         cobd_exp = cobd_get_exp(obd);
 254         easize = lov_mds_md_size(tgt_count);
 255         cookiesize = tgt_count * sizeof(struct llog_cookie);
 256         rc = obd_init_ea_size(cobd_exp, easize, cookiesize);
 257         RETURN(rc);
 258 }
 259
 260 static int
 261 cobd_connect_client(struct obd_device *obd,
 262                     struct obd_export *exp,
 263                     struct lustre_handle *conn,
 264                     struct obd_connect_data *data,
 265                     unsigned long flags)
 266 {
 267         struct obd_device *cli_obd;
 268         int rc = 0;
 269         ENTRY;
 270
 271         LASSERT(obd);
 272         LASSERT(conn);
 273
 274         cli_obd = class_exp2obd(exp);
 275         if (cli_obd == NULL)
 276                 RETURN(-EINVAL);
 277
 278         rc = obd_connect(conn, cli_obd, &obd->obd_uuid,
 279                          data, flags);
 280         if (rc)
 281                 CERROR("error connecting err %d\n", rc);
 282
 283         RETURN(rc);
 284 }
 285
 286 static int
 287 cobd_disconnect_client(struct obd_device *obd,
 288                        struct obd_export *exp,
 289                        unsigned long flags)
 290 {
 291         struct obd_device *cli_obd;
 292         int rc = 0;
 293         ENTRY;
 294
 295         cli_obd = class_exp2obd(exp);
 296         cli_obd->obd_no_recov = obd->obd_no_recov;
 297
 298         rc = obd_disconnect(exp, flags);
 299         if (rc) {
 300                 CERROR("error disconnecting from %s, err %d\n",
 301                        cli_obd->obd_name, rc);
 302                 class_export_put(exp);
 303         }
 304         RETURN(rc);
 305 }
 306
 307 #define COBD_CONNECT (1 << 0)
 308 #define COBD_DISCON (1 << 1)
 309 #define COBD_BOTH (1 << 2)
 310
 311 /* magic function for switching cobd between two exports cache and master in
 312  * strong correspondence with passed @cache_on. It also may perform partial
 313  * actions like only turn off old export or only turn on new one.
 314  *
 315  * bias == COBD_CONNECT only connect new export (used in cobd_connect())
 316  * bias == COBD_DISCON only disconnect old export (used in cobd_disconnect())
 317  * bias == COBD_BOTH do both (disconnect old and connect new) (used in
 318  * cobd_iocontrol())
 319  */
 320 static int cobd_switch(struct obd_device *obd,
 321                        int cache_on, int bias)
 322 {
 323         struct cache_obd *cobd = &obd->u.cobd;
 324         struct obd_device *cli_obd = NULL;
 325         struct lustre_handle conn = {0,};
 326         struct obd_export *discon_exp;
 327         struct obd_export *conn_exp;
 328         int rc = 0;
 329         ENTRY;
 330
 331         if (cache_on) {
 332                 discon_exp = cobd->master_real_exp;
 333                 conn_exp = cobd->cache_exp;
 334         } else {
 335                 discon_exp = cobd->cache_real_exp;
 336                 conn_exp = cobd->master_exp;
 337         }
 338
 339         /* disconnect old export */
 340         if (bias == COBD_BOTH || bias == COBD_DISCON) {
 341                 if (discon_exp) {
 342                         rc = cobd_disconnect_client(obd, discon_exp, 0);
 343                         if (rc) {
 344                                 CWARN("can't disconnect export %p, err %d\n",
 345                                       discon_exp, rc);
 346                         }
 347                 }
 348
 349                 if (cache_on)
 350                         cobd->master_real_exp = NULL;
 351                 else
 352                         cobd->cache_real_exp = NULL;
 353         }
 354
 355         /* connect new export */
 356         if (bias == COBD_BOTH || bias == COBD_CONNECT) {
 357                 rc = cobd_connect_client(obd, conn_exp, &conn,
 358                                          NULL, OBD_OPT_REAL_CLIENT);
 359                 if (rc) {
 360                         CERROR("can't connect export %p, err %d\n",
 361                                conn_exp, rc);
 362                         RETURN(rc);
 363                 }
 364
 365                 if (cache_on) {
 366                         cobd->cache_real_exp = class_conn2export(&conn);
 367                         cli_obd = class_exp2obd(cobd->cache_exp);
 368                 } else {
 369                         cobd->master_real_exp = class_conn2export(&conn);
 370                         cli_obd = class_exp2obd(cobd->master_exp);
 371                 }
 372         }
 373
 374         cobd->cache_on = cache_on;
 375
 376         if (bias == COBD_BOTH || bias == COBD_CONNECT) {
 377                 /* re-init EA size for new selected export. This should be done after
 378                  * assigining new state to @cobd->cache_on to not call not connened
 379                  * already old export. */
 380                 if (obd_md_type(cli_obd)) {
 381                         rc = cobd_init_dt_desc(obd);
 382                         if (rc == 0) {
 383                                 rc = cobd_init_ea_size(obd);
 384                                 if (rc) {
 385                                         CERROR("can't initialize EA size, "
 386                                                "err %d\n", rc);
 387                                 }
 388                         } else {
 389                                 /* ignore cases when we di dnot manage to init
 390                                  * lovdesc. This is because some devices may not know
 391                                  * "lovdesc" info command. */
 392                                 rc = 0;
 393                         }
 394                 }
 395         }
 396
 397         RETURN(rc);
 398 }
 399
 400 static int
 401 cobd_connect(struct lustre_handle *conn, struct obd_device *obd,
 402              struct obd_uuid *cluuid, struct obd_connect_data *data,
 403              unsigned long flags)
 404 {
 405         struct cache_obd *cobd = &obd->u.cobd;
 406         struct obd_export *exp;
 407         int rc = 0;
 408         ENTRY;
 409
 410         rc = class_connect(conn, obd, cluuid);
 411         if (rc)
 412                 RETURN(rc);
 413
 414         exp = class_conn2export(conn);
 415         rc = cobd_switch(obd, cobd->cache_on,
 416                          COBD_CONNECT);
 417         if (rc)
 418                 class_disconnect(exp, 0);
 419         else
 420                 class_export_put(exp);
 421         RETURN(rc);
 422 }
 423
 424 static int
 425 cobd_disconnect(struct obd_export *exp, unsigned long flags)
 426 {
 427         struct cache_obd *cobd;
 428         struct obd_device *obd;
 429         int rc = 0;
 430         ENTRY;
 431
 432         LASSERT(exp != NULL);
 433         obd = class_exp2obd(exp);
 434         if (obd == NULL) {
 435                 CDEBUG(D_IOCTL, "invalid client cookie "
 436                        LPX64"\n", exp->exp_handle.h_cookie);
 437                 RETURN(-EINVAL);
 438         }
 439
 440         /* here would be nice also to check that disconnect goes to the same
 441          * export as connect did. But as now we are accepting the notion that
 442          * cache should be switched after client umount this is not needed.
 443          * --umka. */
 444         cobd = &obd->u.cobd;
 445         rc = cobd_switch(obd, cobd->cache_on, COBD_DISCON);
 446         class_disconnect(exp, flags);
 447
 448         RETURN(rc);
 449 }
 450
 451 static int cobd_get_info(struct obd_export *exp, __u32 keylen,
 452                          void *key, __u32 *vallen, void *val)
 453 {
 454         struct obd_device *obd = class_exp2obd(exp);
 455         struct obd_export *cobd_exp;
 456         int rc = 0;
 457         ENTRY;
 458
 459         if (obd == NULL) {
 460                 CERROR("invalid client cookie "LPX64"\n",
 461                        exp->exp_handle.h_cookie);
 462                 RETURN(-EINVAL);
 463         }
 464         cobd_exp = cobd_get_exp(obd);
 465
 466         /* intercept cache utilisation info? */
 467         rc = obd_get_info(cobd_exp, keylen, key, vallen, val);
 468         RETURN(rc);
 469 }
 470
 471 static int cobd_set_info(struct obd_export *exp, obd_count keylen,
 472                          void *key, obd_count vallen, void *val)
 473 {
 474         struct obd_device *obd = class_exp2obd(exp);
 475         struct obd_export *cobd_exp;
 476         int rc = 0;
 477         ENTRY;
 478
 479         if (obd == NULL) {
 480                 CERROR("invalid client cookie "LPX64"\n",
 481                        exp->exp_handle.h_cookie);
 482                 RETURN(-EINVAL);
 483         }
 484         cobd_exp = cobd_get_exp(obd);
 485
 486         LASSERT(cobd_exp);
 487
 488         /* intercept cache utilisation info? */
 489         rc = obd_set_info(cobd_exp, keylen, key, vallen, val);
 490         RETURN(rc);
 491 }
 492
 493 static int cobd_statfs(struct obd_device *obd,
 494                        struct obd_statfs *osfs,
 495                        unsigned long max_age)
 496 {
 497         struct obd_export *cobd_exp;
 498         int rc = 0;
 499         ENTRY;
 500
 501         cobd_exp = cobd_get_exp(obd);
 502         rc = obd_statfs(class_exp2obd(cobd_exp), osfs, max_age);
 503         RETURN(rc);
 504 }
 505
 506 static int cobd_iocontrol(unsigned int cmd, struct obd_export *exp,
 507                           int len, void *karg, void *uarg)
 508 {
 509         struct obd_device *obd = class_exp2obd(exp);
 510         struct cache_obd  *cobd = &obd->u.cobd;
 511         struct obd_export *cobd_exp;
 512         int rc = 0;
 513         ENTRY;
 514
 515         down(&cobd->sem);
 516
 517         /* here would be nice also to make sure somehow that there are no
 518          * out-standing requests which go to wrong MDS after cache switch (close
 519          * RPCs). But how to check that from COBD? I do not know. --umka */
 520         switch (cmd) {
 521         case OBD_IOC_COBD_CON:
 522                 if (!cobd->cache_on)
 523                         rc = cobd_switch(obd, 1, COBD_BOTH);
 524                 break;
 525         case OBD_IOC_COBD_COFF:
 526                 if (cobd->cache_on)
 527                         rc = cobd_switch(obd, 0, COBD_BOTH);
 528                 break;
 529         default:
 530                 cobd_exp = cobd_get_exp(obd);
 531                 rc = obd_iocontrol(cmd, cobd_exp, len, karg, uarg);
 532         }
 533
 534         up(&cobd->sem);
 535         RETURN(rc);
 536 }
 537
 538 static int cobd_dt_packmd(struct obd_export *exp,
 539                           struct lov_mds_md **disk_tgt,
 540                           struct lov_stripe_md *mem_src)
 541 {
 542         struct obd_device *obd = class_exp2obd(exp);
 543         struct obd_export *cobd_exp;
 544         int rc = 0;
 545         ENTRY;
 546
 547         if (obd == NULL) {
 548                 CERROR("invalid client cookie "LPX64"\n",
 549                        exp->exp_handle.h_cookie);
 550                 RETURN(-EINVAL);
 551         }
 552         cobd_exp = cobd_get_exp(obd);
 553         rc = obd_packmd(cobd_exp, disk_tgt, mem_src);
 554         RETURN(rc);
 555 }
 556
 557 static int cobd_dt_unpackmd(struct obd_export *exp,
 558                             struct lov_stripe_md **mem_tgt,
 559                             struct lov_mds_md *disk_src,
 560                             int disk_len)
 561 {
 562         struct obd_device *obd = class_exp2obd(exp);
 563         struct obd_export *cobd_exp;
 564         int rc = 0;
 565         ENTRY;
 566
 567         if (obd == NULL) {
 568                 CERROR("invalid client cookie "LPX64"\n",
 569                        exp->exp_handle.h_cookie);
 570                 RETURN(-EINVAL);
 571         }
 572         cobd_exp = cobd_get_exp(obd);
 573         rc = obd_unpackmd(cobd_exp, mem_tgt, disk_src, disk_len);
 574         RETURN(rc);
 575 }
 576
 577 static int cobd_dt_create(struct obd_export *exp,
 578                           struct obdo *obdo,
 579                           void *acl, int acl_size,
 580                           struct lov_stripe_md **ea,
 581                           struct obd_trans_info *oti)
 582 {
 583         struct obd_device *obd = class_exp2obd(exp);
 584         struct obd_export *cobd_exp;
 585         int rc = 0;
 586         ENTRY;
 587
 588         if (obd == NULL) {
 589                 CERROR("invalid client cookie "LPX64"\n",
 590                        exp->exp_handle.h_cookie);
 591                 RETURN(-EINVAL);
 592         }
 593         cobd_exp = cobd_get_exp(obd);
 594         rc = obd_create(cobd_exp, obdo, acl, acl_size, ea, oti);
 595         RETURN(rc);
 596 }
 597
 598 static int cobd_dt_destroy(struct obd_export *exp,
 599                            struct obdo *obdo,
 600                            struct lov_stripe_md *ea,
 601                            struct obd_trans_info *oti)
 602 {
 603         struct obd_device *obd = class_exp2obd(exp);
 604         struct obd_export *cobd_exp;
 605         int rc = 0;
 606         ENTRY;
 607
 608         if (obd == NULL) {
 609                 CERROR("invalid client cookie "LPX64"\n",
 610                        exp->exp_handle.h_cookie);
 611                 RETURN(-EINVAL);
 612         }
 613         cobd_exp = cobd_get_exp(obd);
 614         rc = obd_destroy(cobd_exp, obdo, ea, oti);
 615         RETURN(rc);
 616 }
 617
 618 static int cobd_dt_precleanup(struct obd_device *obd, int flags)
 619 {
 620         /* FIXME: do we need some cleanup here? */
 621         ENTRY;
 622         RETURN(0);
 623 }
 624
 625 static int cobd_dt_getattr(struct obd_export *exp, struct obdo *oa,
 626                            struct lov_stripe_md *ea)
 627 {
 628         struct obd_device *obd = class_exp2obd(exp);
 629         struct obd_export *cobd_exp;
 630         int rc = 0;
 631         ENTRY;
 632
 633         if (obd == NULL) {
 634                 CERROR("invalid client cookie "LPX64"\n",
 635                        exp->exp_handle.h_cookie);
 636                 RETURN(-EINVAL);
 637         }
 638         cobd_exp = cobd_get_exp(obd);
 639         rc = obd_getattr(cobd_exp, oa, ea);
 640         RETURN(rc);
 641 }
 642
 643 static int cobd_dt_getattr_async(struct obd_export *exp,
 644                                  struct obdo *obdo, struct lov_stripe_md *ea,
 645                                  struct ptlrpc_request_set *set)
 646 {
 647         struct obd_device *obd = class_exp2obd(exp);
 648         struct obd_export *cobd_exp;
 649         int rc = 0;
 650         ENTRY;
 651
 652         if (obd == NULL) {
 653                 CERROR("invalid client cookie "LPX64"\n",
 654                        exp->exp_handle.h_cookie);
 655                 RETURN(-EINVAL);
 656         }
 657         cobd_exp = cobd_get_exp(obd);
 658         rc = obd_getattr_async(cobd_exp, obdo, ea, set);
 659         RETURN(rc);
 660 }
 661
 662 static int cobd_dt_setattr(struct obd_export *exp, struct obdo *obdo,
 663                            struct lov_stripe_md *ea,
 664                            struct obd_trans_info *oti)
 665 {
 666         struct obd_device *obd = class_exp2obd(exp);
 667         struct obd_export *cobd_exp;
 668         int rc = 0;
 669         ENTRY;
 670
 671         if (obd == NULL) {
 672                 CERROR("invalid client cookie "LPX64"\n",
 673                        exp->exp_handle.h_cookie);
 674                 RETURN(-EINVAL);
 675         }
 676         cobd_exp = cobd_get_exp(obd);
 677         rc = obd_setattr(cobd_exp, obdo, ea, oti);
 678         RETURN(rc);
 679 }
 680
 681 static int cobd_dt_brw(int cmd, struct obd_export *exp, struct obdo *oa,
 682                        struct lov_stripe_md *ea, obd_count oa_bufs,
 683                        struct brw_page *pg, struct obd_trans_info *oti)
 684 {
 685         struct obd_device *obd = class_exp2obd(exp);
 686         struct obd_export *cobd_exp;
 687         int rc = 0;
 688         ENTRY;
 689
 690         if (obd == NULL) {
 691                 CERROR("invalid client cookie "LPX64"\n",
 692                        exp->exp_handle.h_cookie);
 693                 RETURN(-EINVAL);
 694         }
 695         cobd_exp = cobd_get_exp(obd);
 696         rc = obd_brw(cmd, cobd_exp, oa, ea, oa_bufs, pg, oti);
 697         RETURN(rc);
 698 }
 699
 700 static int cobd_dt_brw_async(int cmd, struct obd_export *exp,
 701                              struct obdo *oa, struct lov_stripe_md *ea,
 702                              obd_count oa_bufs, struct brw_page *pg,
 703                              struct ptlrpc_request_set *set,
 704                              struct obd_trans_info *oti)
 705 {
 706         struct obd_device *obd = class_exp2obd(exp);
 707         struct obd_export *cobd_exp;
 708         int rc = 0;
 709         ENTRY;
 710
 711         if (obd == NULL) {
 712                 CERROR("invalid client cookie "LPX64"\n",
 713                        exp->exp_handle.h_cookie);
 714                 RETURN(-EINVAL);
 715         }
 716         cobd_exp = cobd_get_exp(obd);
 717         rc = obd_brw_async(cmd, cobd_exp, oa, ea, oa_bufs,
 718                            pg, set, oti);
 719         RETURN(rc);
 720 }
 721
 722 static int cobd_dt_prep_async_page(struct obd_export *exp,
 723                                    struct lov_stripe_md *lsm,
 724                                    struct lov_oinfo *loi,
 725                                    struct page *page, obd_off offset,
 726                                    struct obd_async_page_ops *ops,
 727                                    void *data, void **res)
 728 {
 729         struct obd_device *obd = class_exp2obd(exp);
 730         struct obd_export *cobd_exp;
 731         int rc = 0;
 732         ENTRY;
 733
 734         if (obd == NULL) {
 735                 CERROR("invalid client cookie "LPX64"\n",
 736                        exp->exp_handle.h_cookie);
 737                 RETURN(-EINVAL);
 738         }
 739         cobd_exp = cobd_get_exp(obd);
 740         rc = obd_prep_async_page(cobd_exp, lsm, loi, page,
 741                                  offset, ops, data, res);
 742         RETURN(rc);
 743 }
 744
 745 static int cobd_dt_queue_async_io(struct obd_export *exp,
 746                                   struct lov_stripe_md *lsm,
 747                                   struct lov_oinfo *loi, void *cookie,
 748                                   int cmd, obd_off off, int count,
 749                                   obd_flags brw_flags, obd_flags async_flags)
 750 {
 751         struct obd_device *obd = class_exp2obd(exp);
 752         struct obd_export *cobd_exp;
 753         int rc = 0;
 754         ENTRY;
 755
 756         if (obd == NULL) {
 757                 CERROR("invalid client cookie "LPX64"\n",
 758                        exp->exp_handle.h_cookie);
 759                 RETURN(-EINVAL);
 760         }
 761         cobd_exp = cobd_get_exp(obd);
 762         rc = obd_queue_async_io(cobd_exp, lsm, loi, cookie, cmd, off,
 763                                 count, brw_flags, async_flags);
 764         RETURN(rc);
 765 }
 766
 767 static int cobd_dt_set_async_flags(struct obd_export *exp,
 768                                    struct lov_stripe_md *lsm,
 769                                    struct lov_oinfo *loi, void *cookie,
 770                                    obd_flags async_flags)
 771 {
 772         struct obd_device *obd = class_exp2obd(exp);
 773         struct obd_export *cobd_exp;
 774         int rc = 0;
 775         ENTRY;
 776
 777         if (obd == NULL) {
 778                 CERROR("invalid client cookie "LPX64"\n",
 779                        exp->exp_handle.h_cookie);
 780                 RETURN(-EINVAL);
 781         }
 782         cobd_exp = cobd_get_exp(obd);
 783         rc = obd_set_async_flags(cobd_exp, lsm, loi, cookie,
 784                                  async_flags);
 785         RETURN(rc);
 786 }
 787
 788 static int cobd_dt_queue_group_io(struct obd_export *exp,
 789                                   struct lov_stripe_md *lsm,
 790                                   struct lov_oinfo *loi,
 791                                   struct obd_io_group *oig,
 792                                   void *cookie, int cmd, obd_off off,
 793                                   int count, obd_flags brw_flags,
 794                                   obd_flags async_flags)
 795 {
 796         struct obd_device *obd = class_exp2obd(exp);
 797         struct obd_export *cobd_exp;
 798         int rc = 0;
 799         ENTRY;
 800
 801         if (obd == NULL) {
 802                 CERROR("invalid client cookie "LPX64"\n",
 803                        exp->exp_handle.h_cookie);
 804                 RETURN(-EINVAL);
 805         }
 806         cobd_exp = cobd_get_exp(obd);
 807         rc = obd_queue_group_io(cobd_exp, lsm, loi, oig, cookie,
 808                                 cmd, off, count, brw_flags,
 809                                 async_flags);
 810         RETURN(rc);
 811 }
 812
 813 static int cobd_dt_trigger_group_io(struct obd_export *exp,
 814                                     struct lov_stripe_md *lsm,
 815                                     struct lov_oinfo *loi,
 816                                     struct obd_io_group *oig)
 817 {
 818         struct obd_device *obd = class_exp2obd(exp);
 819         struct obd_export *cobd_exp;
 820         int rc = 0;
 821         ENTRY;
 822
 823         if (obd == NULL) {
 824                 CERROR("invalid client cookie "LPX64"\n",
 825                        exp->exp_handle.h_cookie);
 826                 RETURN(-EINVAL);
 827         }
 828         cobd_exp = cobd_get_exp(obd);
 829         rc = obd_trigger_group_io(cobd_exp, lsm, loi, oig);
 830         RETURN(rc);
 831 }
 832
 833 static int cobd_dt_teardown_async_page(struct obd_export *exp,
 834                                        struct lov_stripe_md *lsm,
 835                                        struct lov_oinfo *loi,
 836                                        void *cookie)
 837 {
 838         struct obd_device *obd = class_exp2obd(exp);
 839         struct obd_export *cobd_exp;
 840         int rc = 0;
 841         ENTRY;
 842
 843         if (obd == NULL) {
 844                 CERROR("invalid client cookie "LPX64"\n",
 845                        exp->exp_handle.h_cookie);
 846                 RETURN(-EINVAL);
 847         }
 848         cobd_exp = cobd_get_exp(obd);
 849         rc = obd_teardown_async_page(cobd_exp, lsm, loi, cookie);
 850         RETURN(rc);
 851 }
 852
 853 static int cobd_dt_punch(struct obd_export *exp, struct obdo *oa,
 854                          struct lov_stripe_md *ea, obd_size start,
 855                          obd_size end, struct obd_trans_info *oti)
 856 {
 857         struct obd_device *obd = class_exp2obd(exp);
 858         struct obd_export *cobd_exp;
 859         int rc = 0;
 860         ENTRY;
 861
 862         if (obd == NULL) {
 863                 CERROR("invalid client cookie "LPX64"\n",
 864                        exp->exp_handle.h_cookie);
 865                 RETURN(-EINVAL);
 866         }
 867         cobd_exp = cobd_get_exp(obd);
 868         rc = obd_punch(cobd_exp, oa, ea, start, end, oti);
 869         RETURN(rc);
 870 }
 871
 872 static int cobd_dt_sync(struct obd_export *exp, struct obdo *oa,
 873                         struct lov_stripe_md *ea, obd_size start,
 874                         obd_size end)
 875 {
 876         struct obd_device *obd = class_exp2obd(exp);
 877         struct obd_export *cobd_exp;
 878         int rc = 0;
 879         ENTRY;
 880
 881         if (obd == NULL) {
 882                 CERROR("invalid client cookie "LPX64"\n",
 883                        exp->exp_handle.h_cookie);
 884                 RETURN(-EINVAL);
 885         }
 886         cobd_exp = cobd_get_exp(obd);
 887         rc = obd_sync(cobd_exp, oa, ea, start, end);
 888         RETURN(rc);
 889 }
 890
 891 static int cobd_dt_enqueue(struct obd_export *exp, struct lov_stripe_md *ea,
 892                            __u32 type, ldlm_policy_data_t *policy,
 893                            __u32 mode, int *flags, void *bl_cb, void *cp_cb,
 894                            void *gl_cb, void *data, __u32 lvb_len,
 895                            void *lvb_swabber, struct lustre_handle *lockh)
 896 {
 897         struct obd_device *obd = class_exp2obd(exp);
 898         struct obd_export *cobd_exp;
 899         int rc = 0;
 900         ENTRY;
 901
 902         if (obd == NULL) {
 903                 CERROR("invalid client cookie "LPX64"\n",
 904                        exp->exp_handle.h_cookie);
 905                 RETURN(-EINVAL);
 906         }
 907         cobd_exp = cobd_get_exp(obd);
 908         rc = obd_enqueue(cobd_exp, ea, type, policy, mode, flags,
 909                          bl_cb, cp_cb, gl_cb, data, lvb_len,
 910                          lvb_swabber, lockh);
 911         RETURN(rc);
 912 }
 913
 914 static int cobd_dt_match(struct obd_export *exp, struct lov_stripe_md *ea,
 915                          __u32 type, ldlm_policy_data_t *policy, __u32 mode,
 916                          int *flags, void *data, struct lustre_handle *lockh)
 917 {
 918         struct obd_device *obd = class_exp2obd(exp);
 919         struct obd_export *cobd_exp;
 920         int rc = 0;
 921         ENTRY;
 922
 923         if (obd == NULL) {
 924                 CERROR("invalid client cookie "LPX64"\n",
 925                        exp->exp_handle.h_cookie);
 926                 RETURN(-EINVAL);
 927         }
 928         cobd_exp = cobd_get_exp(obd);
 929         rc = obd_match(cobd_exp, ea, type, policy, mode, flags,
 930                        data, lockh);
 931         RETURN(rc);
 932 }
 933 static int cobd_dt_change_cbdata(struct obd_export *exp,
 934                                  struct lov_stripe_md *lsm,
 935                                  ldlm_iterator_t it, void *data)
 936 {
 937         struct obd_device *obd = class_exp2obd(exp);
 938         struct obd_export *cobd_exp;
 939         int rc = 0;
 940         ENTRY;
 941
 942         if (obd == NULL) {
 943                 CERROR("invalid client cookie "LPX64"\n",
 944                        exp->exp_handle.h_cookie);
 945                 RETURN(-EINVAL);
 946         }
 947         cobd_exp = cobd_get_exp(obd);
 948         rc = obd_change_cbdata(cobd_exp, lsm, it, data);
 949         RETURN(rc);
 950 }
 951
 952 static int cobd_dt_cancel(struct obd_export *exp,
 953                           struct lov_stripe_md *ea, __u32 mode,
 954                           struct lustre_handle *lockh)
 955 {
 956         struct obd_device *obd = class_exp2obd(exp);
 957         struct obd_export *cobd_exp;
 958         int rc = 0;
 959         ENTRY;
 960
 961         if (obd == NULL) {
 962                 CERROR("invalid client cookie "LPX64"\n",
 963                        exp->exp_handle.h_cookie);
 964                 RETURN(-EINVAL);
 965         }
 966         cobd_exp = cobd_get_exp(obd);
 967         rc = obd_cancel(cobd_exp, ea, mode, lockh);
 968         RETURN(rc);
 969 }
 970
 971 static int cobd_dt_cancel_unused(struct obd_export *exp,
 972                                  struct lov_stripe_md *ea,
 973                                  int flags, void *opaque)
 974 {
 975         struct obd_device *obd = class_exp2obd(exp);
 976         struct obd_export *cobd_exp;
 977         int rc = 0;
 978         ENTRY;
 979
 980         if (obd == NULL) {
 981                 CERROR("invalid client cookie "LPX64"\n",
 982                        exp->exp_handle.h_cookie);
 983                 RETURN(-EINVAL);
 984         }
 985         cobd_exp = cobd_get_exp(obd);
 986         rc = obd_cancel_unused(cobd_exp, ea, flags, opaque);
 987         RETURN(rc);
 988 }
 989
 990 static int cobd_dt_preprw(int cmd, struct obd_export *exp,
 991                           struct obdo *oa, int objcount,
 992                           struct obd_ioobj *obj, int niocount,
 993                           struct niobuf_remote *nb,
 994                           struct niobuf_local *res,
 995                           struct obd_trans_info *oti)
 996 {
 997         struct obd_device *obd = class_exp2obd(exp);
 998         struct obd_export *cobd_exp;
 999         int rc = 0;
1000         ENTRY;
1001
1002         if (obd == NULL) {
1003                 CERROR("invalid client cookie "LPX64"\n",
1004                        exp->exp_handle.h_cookie);
1005                 RETURN(-EINVAL);
1006         }
1007         cobd_exp = cobd_get_exp(obd);
1008         rc = obd_preprw(cmd, cobd_exp, oa, objcount, obj,
1009                         niocount, nb, res, oti);
1010         RETURN(rc);
1011 }
1012
1013 static int cobd_dt_commitrw(int cmd, struct obd_export *exp, struct obdo *oa,
1014                             int objcount, struct obd_ioobj *obj,
1015                             int niocount, struct niobuf_local *local,
1016                             struct obd_trans_info *oti, int rc)
1017 {
1018         struct obd_device *obd = class_exp2obd(exp);
1019         struct obd_export *cobd_exp;
1020         int err = 0;
1021         ENTRY;
1022
1023         if (obd == NULL) {
1024                 CERROR("invalid client cookie "LPX64"\n",
1025                        exp->exp_handle.h_cookie);
1026                 RETURN(-EINVAL);
1027         }
1028         cobd_exp = cobd_get_exp(obd);
1029         err = obd_commitrw(cmd, cobd_exp, oa, objcount, obj,
1030                            niocount, local, oti, rc);
1031         RETURN(err);
1032 }
1033
1034 static int cobd_dt_adjust_kms(struct obd_export *exp,
1035                               struct lov_stripe_md *lsm,
1036                               obd_off size, int shrink)
1037 {
1038         struct obd_device *obd = class_exp2obd(exp);
1039         struct obd_export *cobd_exp;
1040         int rc = 0;
1041         ENTRY;
1042
1043         if (obd == NULL) {
1044                 CERROR("invalid client cookie "LPX64"\n",
1045                        exp->exp_handle.h_cookie);
1046                 RETURN(-EINVAL);
1047         }
1048         cobd_exp = cobd_get_exp(obd);
1049         rc = obd_adjust_kms(cobd_exp, lsm, size, shrink);
1050
1051         RETURN(rc);
1052 }
1053
1054 static int cobd_dt_llog_init(struct obd_device *obd,
1055                              struct obd_llogs *llogs,
1056                              struct obd_device *disk_obd,
1057                              int count, struct llog_catid *logid)
1058 {
1059         struct obd_export *cobd_exp;
1060         struct obd_device *cobd_obd;
1061         int rc = 0;
1062         ENTRY;
1063
1064         cobd_exp = cobd_get_exp(obd);
1065         cobd_obd = class_exp2obd(cobd_exp);
1066
1067         rc = obd_llog_init(cobd_obd, &cobd_obd->obd_llogs,
1068                            disk_obd, count, logid);
1069         RETURN(rc);
1070 }
1071
1072 static int cobd_dt_llog_finish(struct obd_device *obd,
1073                                struct obd_llogs *llogs,
1074                                int count)
1075 {
1076         struct obd_export *cobd_exp;
1077         struct obd_device *cobd_obd;
1078         int rc = 0;
1079         ENTRY;
1080
1081         cobd_exp = cobd_get_exp(obd);
1082         cobd_obd = class_exp2obd(cobd_exp);
1083
1084         rc = obd_llog_finish(cobd_obd, &cobd_obd->obd_llogs, count);
1085         RETURN(rc);
1086 }
1087
1088 static int cobd_dt_notify(struct obd_device *obd, struct obd_device *watched,
1089                           int active, void *data)
1090 {
1091         struct obd_export *cobd_exp;
1092         int rc = 0;
1093         ENTRY;
1094
1095         cobd_exp = cobd_get_exp(obd);
1096         rc = obd_notify(class_exp2obd(cobd_exp), watched, active, data);
1097         RETURN(rc);
1098 }
1099
1100 static int cobd_dt_pin(struct obd_export *exp, obd_id ino, __u32 gen,
1101                        int type, struct obd_client_handle *handle,
1102                        int flag)
1103 {
1104         struct obd_device *obd = class_exp2obd(exp);
1105         struct obd_export *cobd_exp;
1106         int rc = 0;
1107         ENTRY;
1108
1109         if (obd == NULL) {
1110                 CERROR("invalid client cookie "LPX64"\n",
1111                        exp->exp_handle.h_cookie);
1112                 RETURN(-EINVAL);
1113         }
1114         cobd_exp = cobd_get_exp(obd);
1115         rc = obd_pin(cobd_exp, ino, gen, type, handle, flag);
1116         RETURN(rc);
1117 }
1118
1119 static int cobd_dt_unpin(struct obd_export *exp,
1120                          struct obd_client_handle *handle,
1121                          int flag)
1122 {
1123         struct obd_device *obd = class_exp2obd(exp);
1124         struct obd_export *cobd_exp;
1125         int rc = 0;
1126         ENTRY;
1127
1128         if (obd == NULL) {
1129                 CERROR("invalid client cookie "LPX64"\n",
1130                        exp->exp_handle.h_cookie);
1131                 RETURN(-EINVAL);
1132         }
1133         cobd_exp = cobd_get_exp(obd);
1134         rc = obd_unpin(cobd_exp, handle, flag);
1135         RETURN(rc);
1136 }
1137
1138 static int cobd_dt_init_ea_size(struct obd_export *exp, int easize,
1139                                 int cookiesize)
1140 {
1141         struct obd_export *cobd_exp;
1142         int rc = 0;
1143         ENTRY;
1144
1145         cobd_exp = cobd_get_exp(exp->exp_obd);
1146         rc = obd_init_ea_size(cobd_exp, easize, cookiesize);
1147         RETURN(rc);
1148 }
1149
1150 static int cobd_dt_import_event(struct obd_device *obd,
1151                                 struct obd_import *imp,
1152                                 enum obd_import_event event)
1153 {
1154         struct obd_export *cobd_exp;
1155         ENTRY;
1156
1157         cobd_exp = cobd_get_exp(obd);
1158         obd_import_event(class_exp2obd(cobd_exp), imp, event);
1159         RETURN(0);
1160 }
1161
1162 static int cobd_md_getstatus(struct obd_export *exp,
1163                              struct lustre_id *rootid)
1164 {
1165         struct obd_device *obd = class_exp2obd(exp);
1166         struct obd_export *cobd_exp;
1167         int rc = 0;
1168         ENTRY;
1169
1170         if (obd == NULL) {
1171                 CERROR("invalid client cookie "LPX64"\n",
1172                        exp->exp_handle.h_cookie);
1173                 RETURN(-EINVAL);
1174         }
1175         cobd_exp = cobd_get_exp(obd);
1176         rc = md_getstatus(cobd_exp, rootid);
1177         RETURN(rc);
1178 }
1179
1180 static int cobd_md_getattr(struct obd_export *exp, struct lustre_id *id,
1181                            __u64 valid, const char *xattr_name,
1182                            const void *xattr_data, unsigned int xattr_datalen,
1183                            unsigned int ea_size,
1184                            struct ptlrpc_request **request)
1185 {
1186         struct obd_device *obd = class_exp2obd(exp);
1187         struct obd_export *cobd_exp;
1188         int rc = 0;
1189         ENTRY;
1190
1191         if (obd == NULL) {
1192                 CERROR("invalid client cookie "LPX64"\n",
1193                        exp->exp_handle.h_cookie);
1194                 RETURN(-EINVAL);
1195         }
1196         cobd_exp = cobd_get_exp(obd);
1197         rc = md_getattr(cobd_exp, id, valid, xattr_name,
1198                         xattr_data, xattr_datalen, ea_size, request);
1199         RETURN(rc);
1200 }
1201
1202 static int cobd_md_req2lustre_md(struct obd_export *mdc_exp,
1203                                  struct ptlrpc_request *req,
1204                                  unsigned int offset,
1205                                  struct obd_export *osc_exp,
1206                                  struct lustre_md *md)
1207 {
1208         struct obd_device *obd = class_exp2obd(mdc_exp);
1209         struct obd_export *cobd_exp;
1210         int rc = 0;
1211         ENTRY;
1212
1213         if (obd == NULL) {
1214                 CERROR("invalid client cookie "LPX64"\n",
1215                        mdc_exp->exp_handle.h_cookie);
1216                 RETURN(-EINVAL);
1217         }
1218         cobd_exp = cobd_get_exp(obd);
1219         rc = md_req2lustre_md(cobd_exp, req, offset, osc_exp, md);
1220         RETURN(rc);
1221 }
1222
1223 static int cobd_md_change_cbdata(struct obd_export *exp, struct lustre_id *id,
1224                                  ldlm_iterator_t it, void *data)
1225 {
1226         struct obd_device *obd = class_exp2obd(exp);
1227         struct obd_export *cobd_exp;
1228         int rc = 0;
1229         ENTRY;
1230
1231         if (obd == NULL) {
1232                 CERROR("invalid client cookie "LPX64"\n",
1233                        exp->exp_handle.h_cookie);
1234                 RETURN(-EINVAL);
1235         }
1236         cobd_exp = cobd_get_exp(obd);
1237         rc = md_change_cbdata(cobd_exp, id, it, data);
1238         RETURN(rc);
1239 }
1240
1241 static int cobd_md_getattr_lock(struct obd_export *exp, struct lustre_id *id,
1242                                 char *filename, int namelen, __u64 valid,
1243                                 unsigned int ea_size, struct ptlrpc_request **request)
1244 {
1245         struct obd_device *obd = class_exp2obd(exp);
1246         struct obd_export *cobd_exp;
1247         int rc = 0;
1248         ENTRY;
1249
1250         if (obd == NULL) {
1251                 CERROR("invalid client cookie "LPX64"\n",
1252                        exp->exp_handle.h_cookie);
1253                 RETURN(-EINVAL);
1254         }
1255         cobd_exp = cobd_get_exp(obd);
1256         rc = md_getattr_lock(cobd_exp, id, filename, namelen,
1257                              valid, ea_size, request);
1258         RETURN(rc);
1259 }
1260
1261 static int cobd_md_create(struct obd_export *exp, struct mdc_op_data *op_data,
1262                           const void *data, int datalen, int mode,
1263                           __u32 uid, __u32 gid, __u64 rdev,
1264                           struct ptlrpc_request **request)
1265 {
1266         struct obd_device *obd = class_exp2obd(exp);
1267         struct obd_export *cobd_exp;
1268         int rc = 0;
1269         ENTRY;
1270
1271         if (obd == NULL) {
1272                 CERROR("invalid client cookie "LPX64"\n",
1273                        exp->exp_handle.h_cookie);
1274                 RETURN(-EINVAL);
1275         }
1276         cobd_exp = cobd_get_exp(obd);
1277         rc = md_create(cobd_exp, op_data, data, datalen, mode,
1278                        uid, gid, rdev, request);
1279         RETURN(rc);
1280 }
1281
1282 static int cobd_md_unlink(struct obd_export *exp,
1283                           struct mdc_op_data *data,
1284                           struct ptlrpc_request **request)
1285 {
1286         struct obd_device *obd = class_exp2obd(exp);
1287         struct obd_export *cobd_exp;
1288         int rc = 0;
1289         ENTRY;
1290
1291         if (obd == NULL) {
1292                 CERROR("invalid client cookie "LPX64"\n",
1293                        exp->exp_handle.h_cookie);
1294                 RETURN(-EINVAL);
1295         }
1296         cobd_exp = cobd_get_exp(obd);
1297         rc = md_unlink(cobd_exp, data, request);
1298         RETURN(rc);
1299 }
1300
1301 static int cobd_md_valid_attrs(struct obd_export *exp,
1302                                struct lustre_id *id)
1303 {
1304         struct obd_device *obd = class_exp2obd(exp);
1305         struct obd_export *cobd_exp;
1306         int rc = 0;
1307         ENTRY;
1308
1309         if (obd == NULL) {
1310                 CERROR("invalid client cookie "LPX64"\n",
1311                        exp->exp_handle.h_cookie);
1312                 RETURN(-EINVAL);
1313         }
1314         cobd_exp = cobd_get_exp(obd);
1315         rc = md_valid_attrs(cobd_exp, id);
1316         RETURN(rc);
1317 }
1318
1319 static int cobd_md_rename(struct obd_export *exp, struct mdc_op_data *data,
1320                           const char *old, int oldlen, const char *new,
1321                           int newlen, struct ptlrpc_request **request)
1322 {
1323         struct obd_device *obd = class_exp2obd(exp);
1324         struct obd_export *cobd_exp;
1325         int rc = 0;
1326         ENTRY;
1327
1328         if (obd == NULL) {
1329                 CERROR("invalid client cookie "LPX64"\n",
1330                        exp->exp_handle.h_cookie);
1331                 RETURN(-EINVAL);
1332         }
1333         cobd_exp = cobd_get_exp(obd);
1334         rc = md_rename(cobd_exp, data, old, oldlen, new, newlen, request);
1335         RETURN(rc);
1336 }
1337
1338 static int cobd_md_link(struct obd_export *exp, struct mdc_op_data *data,
1339                         struct ptlrpc_request **request)
1340 {
1341         struct obd_device *obd = class_exp2obd(exp);
1342         struct obd_export *cobd_exp;
1343         int rc = 0;
1344         ENTRY;
1345
1346         if (obd == NULL) {
1347                 CERROR("invalid client cookie "LPX64"\n",
1348                        exp->exp_handle.h_cookie);
1349                 RETURN(-EINVAL);
1350         }
1351         cobd_exp = cobd_get_exp(obd);
1352         rc = md_link(cobd_exp, data, request);
1353         RETURN(rc);
1354 }
1355
1356 static int cobd_md_setattr(struct obd_export *exp, struct mdc_op_data *data,
1357                            struct iattr *iattr, void *ea, int ealen, void *ea2,
1358                            int ea2len, void *ea3, int ea3len,
1359                            struct ptlrpc_request **request)
1360 {
1361         struct obd_device *obd = class_exp2obd(exp);
1362         struct obd_export *cobd_exp;
1363         int rc = 0;
1364         ENTRY;
1365
1366         if (obd == NULL) {
1367                 CERROR("invalid client cookie "LPX64"\n",
1368                        exp->exp_handle.h_cookie);
1369                 RETURN(-EINVAL);
1370         }
1371         cobd_exp = cobd_get_exp(obd);
1372         rc = md_setattr(cobd_exp, data, iattr, ea,
1373                           ealen, ea2, ea2len, ea3, ea3len, request);
1374         RETURN(rc);
1375 }
1376
1377 static int cobd_md_readpage(struct obd_export *exp,
1378                             struct lustre_id *mdc_id,
1379                             __u64 offset, struct page *page,
1380                             struct ptlrpc_request **request)
1381 {
1382         struct obd_device *obd = class_exp2obd(exp);
1383         struct obd_export *cobd_exp;
1384         int rc = 0;
1385         ENTRY;
1386
1387         if (obd == NULL) {
1388                 CERROR("invalid client cookie "LPX64"\n",
1389                        exp->exp_handle.h_cookie);
1390                 RETURN(-EINVAL);
1391         }
1392         cobd_exp = cobd_get_exp(obd);
1393         rc = md_readpage(cobd_exp, mdc_id, offset, page, request);
1394         RETURN(rc);
1395 }
1396
1397 static int cobd_md_close(struct obd_export *exp, struct obdo *obdo,
1398                          struct obd_client_handle *och,
1399                          struct ptlrpc_request **request)
1400 {
1401         struct obd_device *obd = class_exp2obd(exp);
1402         struct obd_export *cobd_exp;
1403         int rc = 0;
1404         ENTRY;
1405
1406         if (obd == NULL) {
1407                 CERROR("invalid client cookie "LPX64"\n",
1408                        exp->exp_handle.h_cookie);
1409                 RETURN(-EINVAL);
1410         }
1411         cobd_exp = cobd_get_exp(obd);
1412         rc = md_close(cobd_exp, obdo, och, request);
1413         RETURN(rc);
1414 }
1415
1416 static int cobd_md_done_writing(struct obd_export *exp,
1417                                 struct obdo *obdo)
1418 {
1419         struct obd_device *obd = class_exp2obd(exp);
1420         struct obd_export *cobd_exp;
1421         int rc = 0;
1422         ENTRY;
1423
1424         if (obd == NULL) {
1425                 CERROR("invalid client cookie "LPX64"\n",
1426                        exp->exp_handle.h_cookie);
1427                 RETURN(-EINVAL);
1428         }
1429         cobd_exp = cobd_get_exp(obd);
1430         rc = md_done_writing(cobd_exp, obdo);
1431         RETURN(rc);
1432 }
1433
1434 static int cobd_md_sync(struct obd_export *exp, struct lustre_id *id,
1435                         struct ptlrpc_request **request)
1436 {
1437         struct obd_device *obd = class_exp2obd(exp);
1438         struct obd_export *cobd_exp;
1439         int rc = 0;
1440         ENTRY;
1441
1442         if (obd == NULL) {
1443                 CERROR("invalid client cookie "LPX64"\n",
1444                        exp->exp_handle.h_cookie);
1445                 RETURN(-EINVAL);
1446         }
1447         cobd_exp = cobd_get_exp(obd);
1448         rc = md_sync(cobd_exp, id, request);
1449         RETURN(rc);
1450 }
1451
1452 static int cobd_md_set_open_replay_data(struct obd_export *exp,
1453                                         struct obd_client_handle *och,
1454                                         struct ptlrpc_request *open_req)
1455 {
1456         struct obd_device *obd = class_exp2obd(exp);
1457         struct obd_export *cobd_exp;
1458         int rc = 0;
1459         ENTRY;
1460
1461         if (obd == NULL) {
1462                 CERROR("invalid client cookie "LPX64"\n",
1463                        exp->exp_handle.h_cookie);
1464                 RETURN(-EINVAL);
1465         }
1466         cobd_exp = cobd_get_exp(obd);
1467         rc = md_set_open_replay_data(cobd_exp, och, open_req);
1468         RETURN(rc);
1469 }
1470
1471 static int cobd_md_clear_open_replay_data(struct obd_export *exp,
1472                                           struct obd_client_handle *och)
1473 {
1474         struct obd_device *obd = class_exp2obd(exp);
1475         struct obd_export *cobd_exp;
1476         int rc = 0;
1477         ENTRY;
1478
1479         if (obd == NULL) {
1480                 CERROR("invalid client cookie "LPX64"\n",
1481                        exp->exp_handle.h_cookie);
1482                 RETURN(-EINVAL);
1483         }
1484         cobd_exp = cobd_get_exp(obd);
1485         rc = md_clear_open_replay_data(cobd_exp, och);
1486         RETURN(rc);
1487 }
1488
1489 static int cobd_md_store_inode_generation(struct obd_export *exp,
1490                                           struct ptlrpc_request *req,
1491                                           int reqoff, int repoff)
1492 {
1493         struct obd_device *obd = class_exp2obd(exp);
1494         struct obd_export *cobd_exp;
1495         int rc = 0;
1496         ENTRY;
1497
1498         if (obd == NULL) {
1499                 CERROR("invalid client cookie "LPX64"\n",
1500                        exp->exp_handle.h_cookie);
1501                 RETURN(-EINVAL);
1502         }
1503         cobd_exp = cobd_get_exp(obd);
1504         rc = md_store_inode_generation(cobd_exp, req, reqoff, repoff);
1505         RETURN(rc);
1506 }
1507
1508 static int cobd_md_set_lock_data(struct obd_export *exp,
1509                                  __u64 *l, void *data)
1510 {
1511         struct obd_device *obd = class_exp2obd(exp);
1512         struct obd_export *cobd_exp;
1513         int rc = 0;
1514         ENTRY;
1515
1516         if (obd == NULL) {
1517                 CERROR("invalid client cookie "LPX64"\n",
1518                        exp->exp_handle.h_cookie);
1519                 RETURN(-EINVAL);
1520         }
1521         cobd_exp = cobd_get_exp(obd);
1522         rc = md_set_lock_data(cobd_exp, l, data);
1523         RETURN(rc);
1524 }
1525
1526 static int cobd_md_enqueue(struct obd_export *exp, int lock_type,
1527                            struct lookup_intent *it, int lock_mode,
1528                            struct mdc_op_data *data, struct lustre_handle *lockh,
1529                            void *lmm, int lmmsize,
1530                            ldlm_completion_callback cb_completion,
1531                            ldlm_blocking_callback cb_blocking, void *cb_data)
1532 {
1533         struct obd_device *obd = class_exp2obd(exp);
1534         struct obd_export *cobd_exp;
1535         int rc = 0;
1536         ENTRY;
1537
1538         if (obd == NULL) {
1539                 CERROR("invalid client cookie "LPX64"\n",
1540                        exp->exp_handle.h_cookie);
1541                 RETURN(-EINVAL);
1542         }
1543         cobd_exp = cobd_get_exp(obd);
1544         rc = md_enqueue(cobd_exp, lock_type, it, lock_mode, data,
1545                         lockh, lmm, lmmsize, cb_completion, cb_blocking,
1546                         cb_data);
1547         RETURN(rc);
1548 }
1549
1550 static int cobd_md_intent_lock(struct obd_export *exp, struct lustre_id *pid,
1551                                const char *name, int len, void *lmm, int lmmsize,
1552                                struct lustre_id *cid, struct lookup_intent *it,
1553                                int lookup_flags, struct ptlrpc_request **reqp,
1554                                ldlm_blocking_callback cb_blocking)
1555 {
1556         struct obd_device *obd = class_exp2obd(exp);
1557         struct obd_export *cobd_exp;
1558         int rc = 0;
1559         ENTRY;
1560
1561         if (obd == NULL) {
1562                 CERROR("invalid client cookie "LPX64"\n",
1563                        exp->exp_handle.h_cookie);
1564                 RETURN(-EINVAL);
1565         }
1566         lookup_flags |= LOOKUP_COBD;
1567         cobd_exp = cobd_get_exp(obd);
1568
1569         rc = md_intent_lock(cobd_exp, pid, name, len, lmm, lmmsize,
1570                             cid, it, lookup_flags, reqp, cb_blocking);
1571         RETURN(rc);
1572 }
1573
1574 static struct obd_device *cobd_md_get_real_obd(struct obd_export *exp,
1575                                                struct lustre_id *id)
1576 {
1577         struct obd_device *obd = class_exp2obd(exp);
1578         struct obd_export *cobd_exp;
1579         ENTRY;
1580
1581         if (obd == NULL) {
1582                 CERROR("invalid client cookie "LPX64"\n",
1583                        exp->exp_handle.h_cookie);
1584                 RETURN(NULL);
1585         }
1586         cobd_exp = cobd_get_exp(obd);
1587         RETURN(md_get_real_obd(cobd_exp, id));
1588 }
1589
1590 static int cobd_md_change_cbdata_name(struct obd_export *exp,
1591                                       struct lustre_id *id, char *name,
1592                                       int namelen, struct lustre_id *id2,
1593                                       ldlm_iterator_t it, void *data)
1594 {
1595         struct obd_device *obd = class_exp2obd(exp);
1596         struct obd_export *cobd_exp;
1597         int rc = 0;
1598
1599         if (obd == NULL) {
1600                 CERROR("invalid client cookie "LPX64"\n",
1601                        exp->exp_handle.h_cookie);
1602                 RETURN(-EINVAL);
1603         }
1604         cobd_exp = cobd_get_exp(obd);
1605         rc = md_change_cbdata_name(cobd_exp, id, name, namelen,
1606                                    id2, it, data);
1607         RETURN(rc);
1608 }
1609
1610 static struct obd_ops cobd_obd_ops = {
1611         .o_owner                  = THIS_MODULE,
1612         .o_attach                 = cobd_attach,
1613         .o_detach                 = cobd_detach,
1614         .o_setup                  = cobd_setup,
1615         .o_cleanup                = cobd_cleanup,
1616         .o_connect                = cobd_connect,
1617         .o_disconnect             = cobd_disconnect,
1618         .o_set_info               = cobd_set_info,
1619         .o_get_info               = cobd_get_info,
1620         .o_statfs                 = cobd_statfs,
1621         .o_iocontrol              = cobd_iocontrol,
1622
1623         .o_packmd                 = cobd_dt_packmd,
1624         .o_unpackmd               = cobd_dt_unpackmd,
1625         .o_create                 = cobd_dt_create,
1626         .o_destroy                = cobd_dt_destroy,
1627         .o_precleanup             = cobd_dt_precleanup,
1628         .o_getattr                = cobd_dt_getattr,
1629         .o_getattr_async          = cobd_dt_getattr_async,
1630         .o_setattr                = cobd_dt_setattr,
1631         .o_brw                    = cobd_dt_brw,
1632         .o_brw_async              = cobd_dt_brw_async,
1633         .o_prep_async_page        = cobd_dt_prep_async_page,
1634         .o_queue_async_io         = cobd_dt_queue_async_io,
1635         .o_set_async_flags        = cobd_dt_set_async_flags,
1636         .o_queue_group_io         = cobd_dt_queue_group_io,
1637         .o_trigger_group_io       = cobd_dt_trigger_group_io,
1638         .o_teardown_async_page    = cobd_dt_teardown_async_page,
1639         .o_preprw                 = cobd_dt_preprw,
1640         .o_punch                  = cobd_dt_punch,
1641         .o_sync                   = cobd_dt_sync,
1642         .o_enqueue                = cobd_dt_enqueue,
1643         .o_match                  = cobd_dt_match,
1644         .o_change_cbdata          = cobd_dt_change_cbdata,
1645         .o_cancel                 = cobd_dt_cancel,
1646         .o_cancel_unused          = cobd_dt_cancel_unused,
1647         .o_commitrw               = cobd_dt_commitrw,
1648         .o_llog_init              = cobd_dt_llog_init,
1649         .o_llog_finish            = cobd_dt_llog_finish,
1650         .o_notify                 = cobd_dt_notify,
1651         .o_pin                    = cobd_dt_pin,
1652         .o_unpin                  = cobd_dt_unpin,
1653         .o_import_event           = cobd_dt_import_event,
1654         .o_init_ea_size           = cobd_dt_init_ea_size,
1655         .o_adjust_kms             = cobd_dt_adjust_kms,
1656 };
1657
1658 struct md_ops cobd_md_ops = {
1659         .m_getstatus              = cobd_md_getstatus,
1660         .m_getattr                = cobd_md_getattr,
1661         .m_req2lustre_md          = cobd_md_req2lustre_md,
1662         .m_change_cbdata          = cobd_md_change_cbdata,
1663         .m_getattr_lock           = cobd_md_getattr_lock,
1664         .m_create                 = cobd_md_create,
1665         .m_unlink                 = cobd_md_unlink,
1666         .m_valid_attrs            = cobd_md_valid_attrs,
1667         .m_rename                 = cobd_md_rename,
1668         .m_link                   = cobd_md_link,
1669         .m_setattr                = cobd_md_setattr,
1670         .m_readpage               = cobd_md_readpage,
1671         .m_close                  = cobd_md_close,
1672         .m_done_writing           = cobd_md_done_writing,
1673         .m_sync                   = cobd_md_sync,
1674         .m_set_open_replay_data   = cobd_md_set_open_replay_data,
1675         .m_clear_open_replay_data = cobd_md_clear_open_replay_data,
1676         .m_store_inode_generation = cobd_md_store_inode_generation,
1677         .m_set_lock_data          = cobd_md_set_lock_data,
1678         .m_enqueue                = cobd_md_enqueue,
1679         .m_get_real_obd           = cobd_md_get_real_obd,
1680         .m_intent_lock            = cobd_md_intent_lock,
1681         .m_change_cbdata_name     = cobd_md_change_cbdata_name,
1682 };
1683
1684 static int __init cobd_init(void)
1685 {
1686         struct lprocfs_static_vars lvars;
1687         ENTRY;
1688
1689         printk(KERN_INFO "Lustre: Caching OBD driver; info@clusterfs.com\n");
1690
1691         lprocfs_init_vars(cobd, &lvars);
1692         RETURN(class_register_type(&cobd_obd_ops, &cobd_md_ops,
1693                                    lvars.module_vars, OBD_CACHE_DEVICENAME));
1694 }
1695
1696 static void /*__exit*/ cobd_exit(void)
1697 {
1698         class_unregister_type(OBD_CACHE_DEVICENAME);
1699 }
1700
1701 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1702 MODULE_DESCRIPTION("Lustre Caching OBD driver");
1703 MODULE_LICENSE("GPL");
1704
1705 module_init(cobd_init);
1706 module_exit(cobd_exit);