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
  36 static int cobd_attach(struct obd_device *obd,
  37                        obd_count len, void *buf)
  38 {
  39         struct lprocfs_static_vars lvars;
  40
  41         lprocfs_init_vars(cobd, &lvars);
  42         return lprocfs_obd_attach(obd, lvars.obd_vars);
  43 }
  44
  45 static int cobd_detach(struct obd_device *obd)
  46 {
  47         return lprocfs_obd_detach(obd);
  48 }
  49
  50 static int cobd_setup(struct obd_device *obd, obd_count len, void *buf)
  51 {
  52         struct lustre_cfg *lcfg = (struct lustre_cfg *)buf;
  53         struct cache_obd  *cobd = &obd->u.cobd;
  54         struct obd_device *master;
  55         int rc = 0;
  56         ENTRY;
  57
  58         if (lcfg->lcfg_inllen1 == 0 || lcfg->lcfg_inlbuf1 == NULL) {
  59                 CERROR("%s: setup requires master device name\n",
  60                        obd->obd_name);
  61                 RETURN(-EINVAL);
  62         }
  63
  64         if (lcfg->lcfg_inllen2 == 0 || lcfg->lcfg_inlbuf2 == NULL) {
  65                 CERROR("%s: setup requires cache device name\n",
  66                        obd->obd_name);
  67                 RETURN(-EINVAL);
  68         }
  69
  70         master = class_name2obd(lcfg->lcfg_inlbuf1);
  71         if (!master) {
  72                 CERROR("%s: unable to find master: %s\n",
  73                        obd->obd_name, lcfg->lcfg_inlbuf1);
  74                 RETURN(-EINVAL);
  75         }
  76
  77         sema_init(&cobd->sem, 1);
  78
  79         OBD_ALLOC(cobd->master_name, lcfg->lcfg_inllen1);
  80         if (!cobd->master_name)
  81                 RETURN(-ENOMEM);
  82         memcpy(cobd->master_name, lcfg->lcfg_inlbuf1,
  83                lcfg->lcfg_inllen1);
  84
  85         OBD_ALLOC(cobd->cache_name, lcfg->lcfg_inllen2);
  86         if (!cobd->cache_name)
  87                 GOTO(put_names, rc = -ENOMEM);
  88         memcpy(cobd->cache_name, lcfg->lcfg_inlbuf2,
  89                lcfg->lcfg_inllen2);
  90
  91         EXIT;
  92 put_names:
  93         if (rc) {
  94                 OBD_FREE(cobd->master_name, lcfg->lcfg_inllen1);
  95                 cobd->master_name = NULL;
  96         }
  97         return rc;
  98 }
  99
 100 static int cobd_cleanup(struct obd_device *obd, int flags)
 101 {
 102         struct cache_obd  *cobd = &obd->u.cobd;
 103         ENTRY;
 104
 105         if (!list_empty(&obd->obd_exports))
 106                 RETURN(-EBUSY);
 107
 108         if (cobd->cache_name)
 109                 OBD_FREE(cobd->cache_name,
 110                          strlen(cobd->cache_name) + 1);
 111         if (cobd->master_name)
 112                 OBD_FREE(cobd->master_name,
 113                          strlen(cobd->master_name) + 1);
 114
 115         RETURN(0);
 116 }
 117
 118 static inline struct obd_export *
 119 cobd_get_exp(struct obd_device *obd)
 120 {
 121         struct cache_obd *cobd = &obd->u.cobd;
 122         if (cobd->cache_on)
 123                 return cobd->cache_exp;
 124         return cobd->master_exp;
 125 }
 126
 127 static int client_obd_connect(struct obd_device *obd, char *name,
 128                               struct lustre_handle *conn,
 129                               struct obd_connect_data *data,
 130                               unsigned long flags)
 131 {
 132         struct obd_device *cli_obd;
 133         int rc = 0;
 134         ENTRY;
 135
 136         LASSERT(obd);
 137         LASSERT(name);
 138         LASSERT(conn);
 139
 140         cli_obd = class_name2obd(name);
 141         if (cli_obd == NULL) {
 142                 CERROR("%s: unable to find a client for obd: %s\n",
 143                        obd->obd_name, name);
 144                 RETURN(-EINVAL);
 145         }
 146         rc = obd_connect(conn, cli_obd, &obd->obd_uuid, data, flags);
 147         if (rc) {
 148                 CERROR("error connecting to %s, err %d\n",
 149                        name, rc);
 150         }
 151         RETURN(rc);
 152 }
 153
 154 static int client_obd_disconnect(struct obd_device *obd,
 155                                  struct obd_export *exp,
 156                                  unsigned long flags)
 157 {
 158         struct obd_device *cli_obd;
 159         int rc = 0;
 160         ENTRY;
 161
 162         cli_obd = class_exp2obd(exp);
 163         cli_obd->obd_no_recov = obd->obd_no_recov;
 164
 165         rc = obd_disconnect(exp, flags);
 166         if (rc) {
 167                 CERROR("error disconnecting from %s, err %d\n",
 168                        cli_obd->obd_name, rc);
 169                 class_export_put(exp);
 170         }
 171         RETURN(rc);
 172 }
 173
 174 static int
 175 cobd_connect(struct lustre_handle *conn, struct obd_device *obd,
 176              struct obd_uuid *cluuid, struct obd_connect_data *data,
 177              unsigned long flags)
 178 {
 179         struct lustre_handle cache_conn = { 0 };
 180         struct cache_obd *cobd = &obd->u.cobd;
 181         struct obd_export *exp;
 182         int rc = 0;
 183         ENTRY;
 184
 185         /* connecting class */
 186         rc = class_connect(conn, obd, cluuid);
 187         if (rc)
 188                 RETURN(rc);
 189         exp = class_conn2export(conn);
 190
 191         /* connecting cache */
 192         rc = client_obd_connect(obd, cobd->cache_name,
 193                                 &cache_conn, data, flags);
 194         if (rc)
 195                 GOTO(err_discon, rc);
 196         cobd->cache_exp = class_conn2export(&cache_conn);
 197         cobd->cache_on = 1;
 198
 199         EXIT;
 200 err_discon:
 201         if (rc)
 202                 class_disconnect(exp, 0);
 203         else
 204                 class_export_put(exp);
 205         return rc;
 206 }
 207
 208 static int
 209 cobd_disconnect(struct obd_export *exp, unsigned long flags)
 210 {
 211         struct obd_device *obd;
 212         struct cache_obd *cobd;
 213         int rc = 0;
 214         ENTRY;
 215
 216         LASSERT(exp != NULL);
 217         obd = class_exp2obd(exp);
 218         if (obd == NULL) {
 219                 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
 220                        exp->exp_handle.h_cookie);
 221                 RETURN(-EINVAL);
 222         }
 223
 224         cobd = &obd->u.cobd;
 225
 226         if (cobd->cache_on) {
 227                 rc = client_obd_disconnect(obd, cobd->cache_exp,
 228                                            flags);
 229                 cobd->cache_exp = NULL;
 230         } else {
 231                 rc = client_obd_disconnect(obd, cobd->master_exp,
 232                                            flags);
 233                 cobd->master_exp = NULL;
 234         }
 235
 236         rc = class_disconnect(exp, flags);
 237         RETURN(rc);
 238 }
 239
 240 static int cobd_get_info(struct obd_export *exp, obd_count keylen,
 241                          void *key, __u32 *vallen, void *val)
 242 {
 243         struct obd_device *obd = class_exp2obd(exp);
 244         struct obd_export *cobd_exp;
 245
 246         if (obd == NULL) {
 247                 CERROR("invalid client cookie "LPX64"\n",
 248                        exp->exp_handle.h_cookie);
 249                 return -EINVAL;
 250         }
 251         cobd_exp = cobd_get_exp(obd);
 252
 253         /* intercept cache utilisation info? */
 254         return obd_get_info(cobd_exp, keylen, key, vallen, val);
 255 }
 256
 257 static int cobd_set_info(struct obd_export *exp, obd_count keylen,
 258                          void *key, obd_count vallen, void *val)
 259 {
 260         struct obd_device *obd = class_exp2obd(exp);
 261         struct obd_export *cobd_exp;
 262
 263         if (obd == NULL) {
 264                 CERROR("invalid client cookie "LPX64"\n",
 265                        exp->exp_handle.h_cookie);
 266                 return -EINVAL;
 267         }
 268         cobd_exp = cobd_get_exp(obd);
 269
 270         /* intercept cache utilisation info? */
 271         return obd_set_info(cobd_exp, keylen, key, vallen, val);
 272 }
 273
 274 static int cobd_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 275                        unsigned long max_age)
 276 {
 277         struct obd_export *cobd_exp;
 278
 279         cobd_exp = cobd_get_exp(obd);
 280
 281         return obd_statfs(class_exp2obd(cobd_exp), osfs, max_age);
 282 }
 283
 284 static int cobd_packmd(struct obd_export *exp,
 285                        struct lov_mds_md **disk_tgt,
 286                        struct lov_stripe_md *mem_src)
 287 {
 288         struct obd_device *obd = class_exp2obd(exp);
 289         struct obd_export *cobd_exp;
 290
 291         if (obd == NULL) {
 292                 CERROR("invalid client cookie "LPX64"\n",
 293                        exp->exp_handle.h_cookie);
 294                 return -EINVAL;
 295         }
 296         cobd_exp = cobd_get_exp(obd);
 297         return obd_packmd(cobd_exp, disk_tgt, mem_src);
 298 }
 299
 300 static int cobd_unpackmd(struct obd_export *exp,
 301                          struct lov_stripe_md **mem_tgt,
 302                          struct lov_mds_md *disk_src,
 303                          int disk_len)
 304 {
 305         struct obd_device *obd = class_exp2obd(exp);
 306         struct obd_export *cobd_exp;
 307
 308         if (obd == NULL) {
 309                 CERROR("invalid client cookie "LPX64"\n",
 310                        exp->exp_handle.h_cookie);
 311                 return -EINVAL;
 312         }
 313         cobd_exp = cobd_get_exp(obd);
 314         return obd_unpackmd(cobd_exp, mem_tgt, disk_src, disk_len);
 315 }
 316
 317 static int cobd_create(struct obd_export *exp, struct obdo *obdo,
 318                        struct lov_stripe_md **ea,
 319                        struct obd_trans_info *oti)
 320 {
 321         struct obd_device *obd = class_exp2obd(exp);
 322         struct obd_export *cobd_exp;
 323
 324         if (obd == NULL) {
 325                 CERROR("invalid client cookie "LPX64"\n",
 326                        exp->exp_handle.h_cookie);
 327                 return -EINVAL;
 328         }
 329         cobd_exp = cobd_get_exp(obd);
 330         return obd_create(cobd_exp, obdo, ea, oti);
 331 }
 332
 333 static int cobd_destroy(struct obd_export *exp, struct obdo *obdo,
 334                         struct lov_stripe_md *ea,
 335                         struct obd_trans_info *oti)
 336 {
 337         struct obd_device *obd = class_exp2obd(exp);
 338         struct obd_export *cobd_exp;
 339
 340         if (obd == NULL) {
 341                 CERROR("invalid client cookie "LPX64"\n",
 342                        exp->exp_handle.h_cookie);
 343                 return -EINVAL;
 344         }
 345         cobd_exp = cobd_get_exp(obd);
 346         return obd_destroy(cobd_exp, obdo, ea, oti);
 347 }
 348
 349 static int cobd_precleanup(struct obd_device *obd, int flags)
 350 {
 351         /* FIXME-WANGDI: do we need some cleanup here? */
 352         return 0;
 353 }
 354
 355 static int cobd_getattr(struct obd_export *exp, struct obdo *oa,
 356                         struct lov_stripe_md *ea)
 357 {
 358         struct obd_device *obd = class_exp2obd(exp);
 359         struct obd_export *cobd_exp;
 360
 361         if (obd == NULL) {
 362                 CERROR("invalid client cookie "LPX64"\n",
 363                        exp->exp_handle.h_cookie);
 364                 return -EINVAL;
 365         }
 366         cobd_exp = cobd_get_exp(obd);
 367         return obd_getattr(cobd_exp, oa, ea);
 368 }
 369
 370 static int cobd_getattr_async(struct obd_export *exp,
 371                               struct obdo *obdo, struct lov_stripe_md *ea,
 372                               struct ptlrpc_request_set *set)
 373 {
 374         struct obd_device *obd = class_exp2obd(exp);
 375         struct obd_export *cobd_exp;
 376
 377         if (obd == NULL) {
 378                 CERROR("invalid client cookie "LPX64"\n",
 379                        exp->exp_handle.h_cookie);
 380                 return -EINVAL;
 381         }
 382         cobd_exp = cobd_get_exp(obd);
 383         return obd_getattr_async(cobd_exp, obdo, ea, set);
 384 }
 385
 386 static int cobd_setattr(struct obd_export *exp, struct obdo *obdo,
 387                         struct lov_stripe_md *ea,
 388                         struct obd_trans_info *oti)
 389 {
 390         struct obd_device *obd = class_exp2obd(exp);
 391         struct obd_export *cobd_exp;
 392
 393         if (obd == NULL) {
 394                 CERROR("invalid client cookie "LPX64"\n",
 395                        exp->exp_handle.h_cookie);
 396                 return -EINVAL;
 397         }
 398         cobd_exp = cobd_get_exp(obd);
 399         return obd_setattr(cobd_exp, obdo, ea, oti);
 400 }
 401
 402 static int cobd_md_getstatus(struct obd_export *exp,
 403                              struct lustre_id *rootid)
 404 {
 405         struct obd_device *obd = class_exp2obd(exp);
 406         struct obd_export *cobd_exp;
 407
 408         if (obd == NULL) {
 409                 CERROR("invalid client cookie "LPX64"\n",
 410                        exp->exp_handle.h_cookie);
 411                 return -EINVAL;
 412         }
 413         cobd_exp = cobd_get_exp(obd);
 414         return md_getstatus(cobd_exp, rootid);
 415 }
 416
 417 static int cobd_brw(int cmd, struct obd_export *exp, struct obdo *oa,
 418                     struct lov_stripe_md *ea, obd_count oa_bufs,
 419                     struct brw_page *pg, struct obd_trans_info *oti)
 420 {
 421         struct obd_device *obd = class_exp2obd(exp);
 422         struct obd_export *cobd_exp;
 423
 424         if (obd == NULL) {
 425                 CERROR("invalid client cookie "LPX64"\n",
 426                        exp->exp_handle.h_cookie);
 427                 return -EINVAL;
 428         }
 429         cobd_exp = cobd_get_exp(obd);
 430         return obd_brw(cmd, cobd_exp, oa, ea, oa_bufs, pg, oti);
 431 }
 432
 433 static int cobd_brw_async(int cmd, struct obd_export *exp,
 434                           struct obdo *oa, struct lov_stripe_md *ea,
 435                           obd_count oa_bufs, struct brw_page *pg,
 436                           struct ptlrpc_request_set *set,
 437                           struct obd_trans_info *oti)
 438 {
 439         struct obd_device *obd = class_exp2obd(exp);
 440         struct obd_export *cobd_exp;
 441
 442         if (obd == NULL) {
 443                 CERROR("invalid client cookie "LPX64"\n",
 444                        exp->exp_handle.h_cookie);
 445                 return -EINVAL;
 446         }
 447         cobd_exp = cobd_get_exp(obd);
 448         return obd_brw_async(cmd, cobd_exp, oa, ea, oa_bufs,
 449                              pg, set, oti);
 450 }
 451
 452 static int cobd_prep_async_page(struct obd_export *exp,
 453                                 struct lov_stripe_md *lsm,
 454                                 struct lov_oinfo *loi,
 455                                 struct page *page, obd_off offset,
 456                                 struct obd_async_page_ops *ops,
 457                                 void *data, void **res)
 458 {
 459         struct obd_device *obd = class_exp2obd(exp);
 460         struct obd_export *cobd_exp;
 461
 462         if (obd == NULL) {
 463                 CERROR("invalid client cookie "LPX64"\n",
 464                        exp->exp_handle.h_cookie);
 465                 return -EINVAL;
 466         }
 467         cobd_exp = cobd_get_exp(obd);
 468         return obd_prep_async_page(cobd_exp, lsm, loi, page, offset,
 469                                    ops, data, res);
 470 }
 471
 472 static int cobd_queue_async_io(struct obd_export *exp,
 473                                struct lov_stripe_md *lsm,
 474                                struct lov_oinfo *loi, void *cookie,
 475                                int cmd, obd_off off, int count,
 476                                obd_flags brw_flags, obd_flags async_flags)
 477 {
 478         struct obd_device *obd = class_exp2obd(exp);
 479         struct obd_export *cobd_exp;
 480
 481         if (obd == NULL) {
 482                 CERROR("invalid client cookie "LPX64"\n",
 483                        exp->exp_handle.h_cookie);
 484                 return -EINVAL;
 485         }
 486         cobd_exp = cobd_get_exp(obd);
 487         return obd_queue_async_io(cobd_exp, lsm, loi, cookie, cmd, off, count,
 488                                   brw_flags, async_flags);
 489 }
 490
 491 static int cobd_set_async_flags(struct obd_export *exp,
 492                                struct lov_stripe_md *lsm,
 493                                struct lov_oinfo *loi, void *cookie,
 494                                obd_flags async_flags)
 495 {
 496         struct obd_device *obd = class_exp2obd(exp);
 497         struct obd_export *cobd_exp;
 498
 499         if (obd == NULL) {
 500                 CERROR("invalid client cookie "LPX64"\n",
 501                        exp->exp_handle.h_cookie);
 502                 return -EINVAL;
 503         }
 504         cobd_exp = cobd_get_exp(obd);
 505         return obd_set_async_flags(cobd_exp, lsm, loi, cookie, async_flags);
 506 }
 507
 508 static int cobd_queue_group_io(struct obd_export *exp,
 509                                struct lov_stripe_md *lsm,
 510                                struct lov_oinfo *loi,
 511                                struct obd_io_group *oig,
 512                                void *cookie, int cmd, obd_off off,
 513                                int count, obd_flags brw_flags,
 514                                obd_flags async_flags)
 515 {
 516         struct obd_device *obd = class_exp2obd(exp);
 517         struct obd_export *cobd_exp;
 518
 519         if (obd == NULL) {
 520                 CERROR("invalid client cookie "LPX64"\n",
 521                        exp->exp_handle.h_cookie);
 522                 return -EINVAL;
 523         }
 524         cobd_exp = cobd_get_exp(obd);
 525         return obd_queue_group_io(cobd_exp, lsm, loi, oig, cookie,
 526                                   cmd, off, count, brw_flags, async_flags);
 527 }
 528
 529 static int cobd_trigger_group_io(struct obd_export *exp,
 530                                  struct lov_stripe_md *lsm,
 531                                  struct lov_oinfo *loi,
 532                                  struct obd_io_group *oig)
 533 {
 534         struct obd_device *obd = class_exp2obd(exp);
 535         struct obd_export *cobd_exp;
 536
 537         if (obd == NULL) {
 538                 CERROR("invalid client cookie "LPX64"\n",
 539                        exp->exp_handle.h_cookie);
 540                 return -EINVAL;
 541         }
 542         cobd_exp = cobd_get_exp(obd);
 543         return obd_trigger_group_io(cobd_exp, lsm, loi, oig);
 544 }
 545
 546 static int cobd_teardown_async_page(struct obd_export *exp,
 547                                     struct lov_stripe_md *lsm,
 548                                     struct lov_oinfo *loi, void *cookie)
 549 {
 550         struct obd_device *obd = class_exp2obd(exp);
 551         struct obd_export *cobd_exp;
 552
 553         if (obd == NULL) {
 554                 CERROR("invalid client cookie "LPX64"\n",
 555                        exp->exp_handle.h_cookie);
 556                 return -EINVAL;
 557         }
 558         cobd_exp = cobd_get_exp(obd);
 559         return obd_teardown_async_page(cobd_exp, lsm, loi, cookie);
 560 }
 561
 562 static int cobd_punch(struct obd_export *exp, struct obdo *oa,
 563                       struct lov_stripe_md *ea, obd_size start,
 564                       obd_size end, struct obd_trans_info *oti)
 565 {
 566         struct obd_device *obd = class_exp2obd(exp);
 567         struct obd_export *cobd_exp;
 568
 569         if (obd == NULL) {
 570                 CERROR("invalid client cookie "LPX64"\n",
 571                        exp->exp_handle.h_cookie);
 572                 return -EINVAL;
 573         }
 574         cobd_exp = cobd_get_exp(obd);
 575         return obd_punch(cobd_exp, oa, ea, start, end, oti);
 576 }
 577
 578 static int cobd_sync(struct obd_export *exp, struct obdo *oa,
 579                      struct lov_stripe_md *ea, obd_size start,
 580                      obd_size end)
 581 {
 582         struct obd_device *obd = class_exp2obd(exp);
 583         struct obd_export *cobd_exp;
 584
 585         if (obd == NULL) {
 586                 CERROR("invalid client cookie "LPX64"\n",
 587                        exp->exp_handle.h_cookie);
 588                 return -EINVAL;
 589         }
 590         cobd_exp = cobd_get_exp(obd);
 591         return obd_sync(cobd_exp, oa, ea, start, end);
 592 }
 593
 594 static int cobd_enqueue(struct obd_export *exp, struct lov_stripe_md *ea,
 595                         __u32 type, ldlm_policy_data_t *policy,
 596                         __u32 mode, int *flags, void *bl_cb, void *cp_cb,
 597                         void *gl_cb, void *data, __u32 lvb_len,
 598                         void *lvb_swabber, struct lustre_handle *lockh)
 599 {
 600         struct obd_device *obd = class_exp2obd(exp);
 601         struct obd_export *cobd_exp;
 602
 603         if (obd == NULL) {
 604                 CERROR("invalid client cookie "LPX64"\n",
 605                        exp->exp_handle.h_cookie);
 606                 return -EINVAL;
 607         }
 608         cobd_exp = cobd_get_exp(obd);
 609         return obd_enqueue(cobd_exp, ea, type, policy, mode, flags,
 610                            bl_cb, cp_cb, gl_cb, data, lvb_len,
 611                            lvb_swabber, lockh);
 612 }
 613
 614 static int cobd_match(struct obd_export *exp, struct lov_stripe_md *ea,
 615                       __u32 type, ldlm_policy_data_t *policy, __u32 mode,
 616                       int *flags, void *data, struct lustre_handle *lockh)
 617 {
 618         struct obd_device *obd = class_exp2obd(exp);
 619         struct obd_export *cobd_exp;
 620
 621         if (obd == NULL) {
 622                 CERROR("invalid client cookie "LPX64"\n",
 623                        exp->exp_handle.h_cookie);
 624                 return -EINVAL;
 625         }
 626         cobd_exp = cobd_get_exp(obd);
 627         return obd_match(cobd_exp, ea, type, policy, mode, flags, data,
 628                          lockh);
 629 }
 630 static int cobd_change_cbdata(struct obd_export *exp,
 631                               struct lov_stripe_md *lsm,
 632                               ldlm_iterator_t it, void *data)
 633 {
 634         struct obd_device *obd = class_exp2obd(exp);
 635         struct obd_export *cobd_exp;
 636
 637         if (obd == NULL) {
 638                 CERROR("invalid client cookie "LPX64"\n",
 639                        exp->exp_handle.h_cookie);
 640                 return -EINVAL;
 641         }
 642         cobd_exp = cobd_get_exp(obd);
 643         return obd_change_cbdata(cobd_exp, lsm, it, data);
 644 }
 645
 646 static int cobd_cancel(struct obd_export *exp,
 647                        struct lov_stripe_md *ea, __u32 mode,
 648                        struct lustre_handle *lockh)
 649 {
 650         struct obd_device *obd = class_exp2obd(exp);
 651         struct obd_export *cobd_exp;
 652
 653         if (obd == NULL) {
 654                 CERROR("invalid client cookie "LPX64"\n",
 655                        exp->exp_handle.h_cookie);
 656                 return -EINVAL;
 657         }
 658         cobd_exp = cobd_get_exp(obd);
 659         return obd_cancel(cobd_exp, ea, mode, lockh);
 660 }
 661
 662 static int cobd_cancel_unused(struct obd_export *exp,
 663                               struct lov_stripe_md *ea, int flags,
 664                               void *opaque)
 665 {
 666         struct obd_device *obd = class_exp2obd(exp);
 667         struct obd_export *cobd_exp;
 668
 669         if (obd == NULL) {
 670                 CERROR("invalid client cookie "LPX64"\n",
 671                        exp->exp_handle.h_cookie);
 672                 return -EINVAL;
 673         }
 674         cobd_exp = cobd_get_exp(obd);
 675         return obd_cancel_unused(cobd_exp, ea, flags, opaque);
 676 }
 677
 678 static int cobd_preprw(int cmd, struct obd_export *exp, struct obdo *oa,
 679                        int objcount, struct obd_ioobj *obj,
 680                        int niocount, struct niobuf_remote *nb,
 681                        struct niobuf_local *res, struct obd_trans_info *oti)
 682 {
 683         struct obd_device *obd = class_exp2obd(exp);
 684         struct obd_export *cobd_exp;
 685
 686         if (obd == NULL) {
 687                 CERROR("invalid client cookie "LPX64"\n",
 688                        exp->exp_handle.h_cookie);
 689                 return -EINVAL;
 690         }
 691         cobd_exp = cobd_get_exp(obd);
 692         return obd_preprw(cmd, cobd_exp, oa, objcount, obj, niocount, nb,
 693                           res, oti);
 694 }
 695
 696 static int cobd_commitrw(int cmd, struct obd_export *exp, struct obdo *oa,
 697                          int objcount, struct obd_ioobj *obj,
 698                          int niocount, struct niobuf_local *local,
 699                          struct obd_trans_info *oti, int rc)
 700 {
 701         struct obd_device *obd = class_exp2obd(exp);
 702         struct obd_export *cobd_exp;
 703
 704         if (obd == NULL) {
 705                 CERROR("invalid client cookie "LPX64"\n",
 706                        exp->exp_handle.h_cookie);
 707                 return -EINVAL;
 708         }
 709         cobd_exp = cobd_get_exp(obd);
 710         return obd_commitrw(cmd, cobd_exp, oa, objcount, obj, niocount,
 711                             local, oti, rc);
 712 }
 713
 714 static int cobd_flush(struct obd_device *obd)
 715 {
 716         return 0;
 717 }
 718
 719 static int cobd_iocontrol(unsigned int cmd, struct obd_export *exp,
 720                           int len, void *karg, void *uarg)
 721 {
 722         struct obd_device *obd = class_exp2obd(exp);
 723         struct cache_obd  *cobd = &obd->u.cobd;
 724         struct obd_export *cobd_exp;
 725         int rc = 0;
 726         ENTRY;
 727
 728         down(&cobd->sem);
 729
 730         switch (cmd) {
 731         case OBD_IOC_COBD_CON:
 732                 if (!cobd->cache_on) {
 733                         struct lustre_handle conn = {0};
 734
 735                         rc = client_obd_disconnect(obd, cobd->master_exp, 0);
 736                         rc = client_obd_connect(obd, cobd->cache_name, &conn,
 737                                                 NULL, 0);
 738                         if (rc)
 739                                 GOTO(out, rc);
 740                         cobd->cache_exp = class_conn2export(&conn);
 741                         cobd->cache_on = 1;
 742                 }
 743                 break;
 744         case OBD_IOC_COBD_COFF:
 745                 if (cobd->cache_on) {
 746                         struct lustre_handle conn = {0,};
 747                         struct obd_device *master = NULL;
 748                         struct obd_device *cache = NULL;
 749                         int easize, cooksize;
 750
 751                         cache = class_exp2obd(cobd->cache_exp);
 752                         easize = cache->u.cli.cl_max_mds_easize;
 753                         cooksize = cache->u.cli.cl_max_mds_cookiesize;
 754
 755                         rc = client_obd_disconnect(obd, cobd->cache_exp, 0);
 756                         rc = client_obd_connect(obd, cobd->master_name, &conn,
 757                                                 NULL, 0);
 758                         if (rc)
 759                                 GOTO(out, rc);
 760                         cobd->master_exp = class_conn2export(&conn);
 761
 762                         master = class_exp2obd(cobd->master_exp);
 763                         master->u.cli.cl_max_mds_easize = easize;
 764                         master->u.cli.cl_max_mds_cookiesize = cooksize;
 765                         cobd->cache_on = 0;
 766                 }
 767                 break;
 768         case OBD_IOC_COBD_CFLUSH:
 769                 if (cobd->cache_on) {
 770                         cobd->cache_on = 0;
 771                         cobd_flush(obd);
 772                 } else {
 773                         CERROR("%s: cache is turned off\n", obd->obd_name);
 774                 }
 775                 break;
 776         default:
 777                 cobd_exp = cobd_get_exp(obd);
 778                 rc = obd_iocontrol(cmd, cobd_exp, len, karg, uarg);
 779         }
 780
 781         EXIT;
 782 out:
 783         up(&cobd->sem);
 784         return rc;
 785 }
 786
 787 static int cobd_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
 788                           struct obd_device *disk_obd, int count,
 789                           struct llog_catid *logid)
 790 {
 791         struct obd_export *cobd_exp;
 792         struct obd_device *cobd_obd;
 793
 794         cobd_exp = cobd_get_exp(obd);
 795         cobd_obd = class_exp2obd(cobd_exp);
 796
 797         return obd_llog_init(cobd_obd, &cobd_obd->obd_llogs,
 798                              disk_obd, count, logid);
 799 }
 800
 801 static int cobd_llog_finish(struct obd_device *obd, struct obd_llogs *llogs,
 802                             int count)
 803 {
 804         struct obd_export *cobd_exp;
 805         struct obd_device *cobd_obd;
 806
 807         cobd_exp = cobd_get_exp(obd);
 808         cobd_obd = class_exp2obd(cobd_exp);
 809
 810         return obd_llog_finish(cobd_obd, &cobd_obd->obd_llogs, count);
 811 }
 812
 813 static int cobd_notify(struct obd_device *obd, struct obd_device *watched,
 814                        int active, void *data)
 815 {
 816         struct obd_export *cobd_exp;
 817
 818         cobd_exp = cobd_get_exp(obd);
 819
 820         return obd_notify(class_exp2obd(cobd_exp), watched, active, data);
 821 }
 822
 823 static int cobd_pin(struct obd_export *exp, obd_id ino, __u32 gen,
 824                     int type, struct obd_client_handle *handle, int flag)
 825 {
 826         struct obd_device *obd = class_exp2obd(exp);
 827         struct obd_export *cobd_exp;
 828
 829         if (obd == NULL) {
 830                 CERROR("invalid client cookie "LPX64"\n",
 831                        exp->exp_handle.h_cookie);
 832                 return -EINVAL;
 833         }
 834         cobd_exp = cobd_get_exp(obd);
 835
 836         return obd_pin(cobd_exp, ino, gen, type, handle, flag);
 837 }
 838
 839 static int cobd_unpin(struct obd_export *exp,
 840                       struct obd_client_handle *handle, int flag)
 841 {
 842         struct obd_device *obd = class_exp2obd(exp);
 843         struct obd_export *cobd_exp;
 844
 845         if (obd == NULL) {
 846                 CERROR("invalid client cookie "LPX64"\n",
 847                        exp->exp_handle.h_cookie);
 848                 return -EINVAL;
 849         }
 850         cobd_exp = cobd_get_exp(obd);
 851
 852         return obd_unpin(cobd_exp, handle, flag);
 853 }
 854
 855 static int cobd_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
 856 {
 857         struct obd_export *cobd_exp;
 858
 859         cobd_exp = cobd_get_exp(exp->exp_obd);
 860         return obd_init_ea_size(cobd_exp, easize, cookiesize);
 861 }
 862
 863 static int  cobd_import_event(struct obd_device *obd,
 864                               struct obd_import *imp,
 865                               enum obd_import_event event)
 866 {
 867         struct obd_export *cobd_exp;
 868
 869         cobd_exp = cobd_get_exp(obd);
 870
 871         obd_import_event(class_exp2obd(cobd_exp), imp, event);
 872
 873         return 0;
 874 }
 875
 876 static int cobd_md_getattr(struct obd_export *exp, struct lustre_id *id,
 877                            __u64 valid, const char *ea_name, int ea_namelen,
 878                            unsigned int ea_size, struct ptlrpc_request **request)
 879 {
 880         struct obd_device *obd = class_exp2obd(exp);
 881         struct obd_export *cobd_exp;
 882
 883         if (obd == NULL) {
 884                 CERROR("invalid client cookie "LPX64"\n",
 885                        exp->exp_handle.h_cookie);
 886                 return -EINVAL;
 887         }
 888         cobd_exp = cobd_get_exp(obd);
 889         return md_getattr(cobd_exp, id, valid, NULL, 0, ea_size, request);
 890 }
 891
 892 static int cobd_md_req2lustre_md (struct obd_export *mdc_exp,
 893                                   struct ptlrpc_request *req, unsigned int offset,
 894                                   struct obd_export *osc_exp, struct lustre_md *md)
 895 {
 896         struct obd_device *obd = class_exp2obd(mdc_exp);
 897         struct obd_export *cobd_exp;
 898
 899         if (obd == NULL) {
 900                 CERROR("invalid client cookie "LPX64"\n",
 901                        mdc_exp->exp_handle.h_cookie);
 902                 return -EINVAL;
 903         }
 904         cobd_exp = cobd_get_exp(obd);
 905         return md_req2lustre_md(cobd_exp, req, offset, osc_exp, md);
 906 }
 907
 908 static int cobd_md_change_cbdata(struct obd_export *exp, struct lustre_id *id,
 909                                  ldlm_iterator_t it, void *data)
 910 {
 911         struct obd_device *obd = class_exp2obd(exp);
 912         struct obd_export *cobd_exp;
 913
 914         if (obd == NULL) {
 915                 CERROR("invalid client cookie "LPX64"\n",
 916                        exp->exp_handle.h_cookie);
 917                 return -EINVAL;
 918         }
 919         cobd_exp = cobd_get_exp(obd);
 920         return md_change_cbdata(cobd_exp, id, it, data);
 921 }
 922
 923 static int cobd_md_getattr_lock(struct obd_export *exp, struct lustre_id *id,
 924                                 char *filename, int namelen, __u64 valid,
 925                                 unsigned int ea_size, struct ptlrpc_request **request)
 926 {
 927         struct obd_device *obd = class_exp2obd(exp);
 928         struct obd_export *cobd_exp;
 929
 930         if (obd == NULL) {
 931                 CERROR("invalid client cookie "LPX64"\n",
 932                        exp->exp_handle.h_cookie);
 933                 return -EINVAL;
 934         }
 935         cobd_exp = cobd_get_exp(obd);
 936         return md_getattr_lock(cobd_exp, id, filename, namelen, valid,
 937                                ea_size, request);
 938 }
 939
 940 static int cobd_md_create(struct obd_export *exp, struct mdc_op_data *op_data,
 941                           const void *data, int datalen, int mode,
 942                           __u32 uid, __u32 gid, __u64 rdev,
 943                           struct ptlrpc_request **request)
 944 {
 945         struct obd_device *obd = class_exp2obd(exp);
 946         struct obd_export *cobd_exp;
 947
 948         if (obd == NULL) {
 949                 CERROR("invalid client cookie "LPX64"\n",
 950                        exp->exp_handle.h_cookie);
 951                 return -EINVAL;
 952         }
 953         cobd_exp = cobd_get_exp(obd);
 954         return md_create(cobd_exp, op_data, data, datalen, mode,
 955                          uid, gid, rdev, request);
 956 }
 957
 958 static int cobd_md_unlink(struct obd_export *exp, struct mdc_op_data *data,
 959                           struct ptlrpc_request **request)
 960 {
 961         struct obd_device *obd = class_exp2obd(exp);
 962         struct obd_export *cobd_exp;
 963
 964         if (obd == NULL) {
 965                 CERROR("invalid client cookie "LPX64"\n",
 966                        exp->exp_handle.h_cookie);
 967                 return -EINVAL;
 968         }
 969         cobd_exp = cobd_get_exp(obd);
 970         return md_unlink(cobd_exp, data, request);
 971 }
 972
 973 static int cobd_md_valid_attrs(struct obd_export *exp,
 974                                struct lustre_id *id)
 975 {
 976         struct obd_device *obd = class_exp2obd(exp);
 977         struct obd_export *cobd_exp;
 978
 979         if (obd == NULL) {
 980                 CERROR("invalid client cookie "LPX64"\n",
 981                        exp->exp_handle.h_cookie);
 982                 return -EINVAL;
 983         }
 984         cobd_exp = cobd_get_exp(obd);
 985         return md_valid_attrs(cobd_exp, id);
 986 }
 987
 988 static int cobd_md_rename(struct obd_export *exp, struct mdc_op_data *data,
 989                           const char *old, int oldlen, const char *new,
 990                           int newlen, struct ptlrpc_request **request)
 991 {
 992         struct obd_device *obd = class_exp2obd(exp);
 993         struct obd_export *cobd_exp;
 994
 995         if (obd == NULL) {
 996                 CERROR("invalid client cookie "LPX64"\n",
 997                        exp->exp_handle.h_cookie);
 998                 return -EINVAL;
 999         }
1000         cobd_exp = cobd_get_exp(obd);
1001         return md_rename(cobd_exp, data, old, oldlen, new, newlen, request);
1002 }
1003
1004 static int cobd_md_link(struct obd_export *exp, struct mdc_op_data *data,
1005                         struct ptlrpc_request **request)
1006 {
1007         struct obd_device *obd = class_exp2obd(exp);
1008         struct obd_export *cobd_exp;
1009
1010         if (obd == NULL) {
1011                 CERROR("invalid client cookie "LPX64"\n",
1012                        exp->exp_handle.h_cookie);
1013                 return -EINVAL;
1014         }
1015         cobd_exp = cobd_get_exp(obd);
1016         return md_link(cobd_exp, data, request);
1017 }
1018
1019 static int cobd_md_setattr(struct obd_export *exp, struct mdc_op_data *data,
1020                            struct iattr *iattr, void *ea, int ealen, void *ea2,
1021                            int ea2len, struct ptlrpc_request **request)
1022 {
1023         struct obd_device *obd = class_exp2obd(exp);
1024         struct obd_export *cobd_exp;
1025
1026         if (obd == NULL) {
1027                 CERROR("invalid client cookie "LPX64"\n",
1028                        exp->exp_handle.h_cookie);
1029                 return -EINVAL;
1030         }
1031         cobd_exp = cobd_get_exp(obd);
1032         return md_setattr(cobd_exp, data, iattr, ea, ealen, ea2, ea2len, request);
1033 }
1034
1035 static int cobd_md_readpage(struct obd_export *exp,
1036                             struct lustre_id *mdc_id,
1037                             __u64 offset, struct page *page,
1038                             struct ptlrpc_request **request)
1039 {
1040         struct obd_device *obd = class_exp2obd(exp);
1041         struct obd_export *cobd_exp;
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         return md_readpage(cobd_exp, mdc_id, offset, page, request);
1050 }
1051
1052 static int cobd_md_close(struct obd_export *exp, struct obdo *obdo,
1053                          struct obd_client_handle *och,
1054                          struct ptlrpc_request **request)
1055 {
1056         struct obd_device *obd = class_exp2obd(exp);
1057         struct obd_export *cobd_exp;
1058
1059         if (obd == NULL) {
1060                 CERROR("invalid client cookie "LPX64"\n",
1061                        exp->exp_handle.h_cookie);
1062                 return -EINVAL;
1063         }
1064         cobd_exp = cobd_get_exp(obd);
1065         return md_close(cobd_exp, obdo, och, request);
1066 }
1067
1068 static int cobd_md_done_writing(struct obd_export *exp, struct obdo *obdo)
1069 {
1070         struct obd_device *obd = class_exp2obd(exp);
1071         struct obd_export *cobd_exp;
1072
1073         if (obd == NULL) {
1074                 CERROR("invalid client cookie "LPX64"\n",
1075                        exp->exp_handle.h_cookie);
1076                 return -EINVAL;
1077         }
1078         cobd_exp = cobd_get_exp(obd);
1079         return md_done_writing(cobd_exp, obdo);
1080 }
1081
1082 static int cobd_md_sync(struct obd_export *exp, struct lustre_id *id,
1083                         struct ptlrpc_request **request)
1084 {
1085         struct obd_device *obd = class_exp2obd(exp);
1086         struct obd_export *cobd_exp;
1087
1088         if (obd == NULL) {
1089                 CERROR("invalid client cookie "LPX64"\n",
1090                        exp->exp_handle.h_cookie);
1091                 return -EINVAL;
1092         }
1093         cobd_exp = cobd_get_exp(obd);
1094
1095         return md_sync(cobd_exp, id, request);
1096 }
1097
1098 static int cobd_md_set_open_replay_data(struct obd_export *exp,
1099                                         struct obd_client_handle *och,
1100                                         struct ptlrpc_request *open_req)
1101 {
1102         struct obd_device *obd = class_exp2obd(exp);
1103         struct obd_export *cobd_exp;
1104
1105         if (obd == NULL) {
1106                 CERROR("invalid client cookie "LPX64"\n",
1107                        exp->exp_handle.h_cookie);
1108                 return -EINVAL;
1109         }
1110         cobd_exp = cobd_get_exp(obd);
1111
1112         return md_set_open_replay_data(cobd_exp, och, open_req);
1113 }
1114
1115 static int cobd_md_clear_open_replay_data(struct obd_export *exp,
1116                                           struct obd_client_handle *och)
1117 {
1118         struct obd_device *obd = class_exp2obd(exp);
1119         struct obd_export *cobd_exp;
1120
1121         if (obd == NULL) {
1122                 CERROR("invalid client cookie "LPX64"\n",
1123                        exp->exp_handle.h_cookie);
1124                 return -EINVAL;
1125         }
1126         cobd_exp = cobd_get_exp(obd);
1127
1128         return md_clear_open_replay_data(cobd_exp, och);
1129 }
1130
1131 static int cobd_md_store_inode_generation(struct obd_export *exp,
1132                                           struct ptlrpc_request *req,
1133                                           int reqoff, int repoff)
1134 {
1135         struct obd_device *obd = class_exp2obd(exp);
1136         struct obd_export *cobd_exp;
1137
1138         if (obd == NULL) {
1139                 CERROR("invalid client cookie "LPX64"\n",
1140                        exp->exp_handle.h_cookie);
1141                 return -EINVAL;
1142         }
1143         cobd_exp = cobd_get_exp(obd);
1144
1145         return md_store_inode_generation(cobd_exp, req, reqoff, repoff);
1146 }
1147
1148 static int cobd_md_set_lock_data(struct obd_export *exp, __u64 *l, void *data)
1149 {
1150         struct obd_device *obd = class_exp2obd(exp);
1151         struct obd_export *cobd_exp;
1152
1153         if (obd == NULL) {
1154                 CERROR("invalid client cookie "LPX64"\n",
1155                        exp->exp_handle.h_cookie);
1156                 return -EINVAL;
1157         }
1158         cobd_exp = cobd_get_exp(obd);
1159
1160         return md_set_lock_data(cobd_exp, l, data);
1161 }
1162
1163 static int cobd_md_enqueue(struct obd_export *exp, int lock_type,
1164                            struct lookup_intent *it, int lock_mode,
1165                            struct mdc_op_data *data, struct lustre_handle *lockh,
1166                            void *lmm, int lmmsize,
1167                            ldlm_completion_callback cb_completion,
1168                            ldlm_blocking_callback cb_blocking, void *cb_data)
1169 {
1170         struct obd_device *obd = class_exp2obd(exp);
1171         struct obd_export *cobd_exp;
1172
1173         if (obd == NULL) {
1174                 CERROR("invalid client cookie "LPX64"\n",
1175                        exp->exp_handle.h_cookie);
1176                 return -EINVAL;
1177         }
1178         cobd_exp = cobd_get_exp(obd);
1179         return md_enqueue(cobd_exp, lock_type, it, lock_mode, data,
1180                           lockh, lmm, lmmsize, cb_completion, cb_blocking,
1181                           cb_data);
1182 }
1183
1184 static int cobd_md_intent_lock(struct obd_export *exp, struct lustre_id *pid,
1185                                const char *name, int len, void *lmm, int lmmsize,
1186                                struct lustre_id *cid, struct lookup_intent *it,
1187                                int lookup_flags, struct ptlrpc_request **reqp,
1188                                ldlm_blocking_callback cb_blocking)
1189 {
1190         struct obd_device *obd = class_exp2obd(exp);
1191         struct obd_export *cobd_exp;
1192
1193         if (obd == NULL) {
1194                 CERROR("invalid client cookie "LPX64"\n",
1195                        exp->exp_handle.h_cookie);
1196                 return -EINVAL;
1197         }
1198         cobd_exp = cobd_get_exp(obd);
1199         return md_intent_lock(cobd_exp, pid, name, len, lmm, lmmsize,
1200                               cid, it, lookup_flags, reqp, cb_blocking);
1201 }
1202
1203 static struct obd_device *cobd_md_get_real_obd(struct obd_export *exp,
1204                                                struct lustre_id *id)
1205 {
1206         struct obd_device *obd = class_exp2obd(exp);
1207         struct obd_export *cobd_exp;
1208
1209         if (obd == NULL) {
1210                 CERROR("invalid client cookie "LPX64"\n",
1211                        exp->exp_handle.h_cookie);
1212                 return NULL;
1213         }
1214         cobd_exp = cobd_get_exp(obd);
1215         return md_get_real_obd(cobd_exp, id);
1216 }
1217
1218 static int cobd_md_change_cbdata_name(struct obd_export *exp,
1219                                       struct lustre_id *id, char *name,
1220                                       int namelen, struct lustre_id *id2,
1221                                       ldlm_iterator_t it, void *data)
1222 {
1223         struct obd_device *obd = class_exp2obd(exp);
1224         struct obd_export *cobd_exp;
1225
1226         if (obd == NULL) {
1227                 CERROR("invalid client cookie "LPX64"\n",
1228                        exp->exp_handle.h_cookie);
1229                 return -EINVAL;
1230         }
1231         cobd_exp = cobd_get_exp(obd);
1232         return md_change_cbdata_name(cobd_exp, id, name, namelen,
1233                                      id2, it, data);
1234 }
1235 static struct obd_ops cobd_obd_ops = {
1236         .o_owner                = THIS_MODULE,
1237         .o_attach               = cobd_attach,
1238         .o_detach               = cobd_detach,
1239         .o_setup                = cobd_setup,
1240         .o_cleanup              = cobd_cleanup,
1241         .o_connect              = cobd_connect,
1242         .o_disconnect           = cobd_disconnect,
1243         .o_set_info             = cobd_set_info,
1244         .o_get_info             = cobd_get_info,
1245         .o_statfs               = cobd_statfs,
1246
1247         .o_packmd               = cobd_packmd,
1248         .o_unpackmd             = cobd_unpackmd,
1249         .o_create               = cobd_create,
1250         .o_destroy              = cobd_destroy,
1251         .o_precleanup           = cobd_precleanup,
1252         .o_getattr              = cobd_getattr,
1253         .o_getattr_async        = cobd_getattr_async,
1254         .o_setattr              = cobd_setattr,
1255
1256         .o_brw                  = cobd_brw,
1257         .o_brw_async            = cobd_brw_async,
1258         .o_prep_async_page      = cobd_prep_async_page,
1259         .o_queue_async_io       = cobd_queue_async_io,
1260         .o_set_async_flags      = cobd_set_async_flags,
1261         .o_queue_group_io       = cobd_queue_group_io,
1262         .o_trigger_group_io     = cobd_trigger_group_io,
1263         .o_teardown_async_page  = cobd_teardown_async_page,
1264         .o_preprw               = cobd_preprw,
1265         .o_punch                = cobd_punch,
1266         .o_sync                 = cobd_sync,
1267         .o_enqueue              = cobd_enqueue,
1268         .o_match                = cobd_match,
1269         .o_change_cbdata        = cobd_change_cbdata,
1270         .o_cancel               = cobd_cancel,
1271         .o_cancel_unused        = cobd_cancel_unused,
1272         .o_iocontrol            = cobd_iocontrol,
1273         .o_commitrw             = cobd_commitrw,
1274         .o_llog_init            = cobd_llog_init,
1275         .o_llog_finish          = cobd_llog_finish,
1276         .o_notify               = cobd_notify,
1277         .o_pin                  = cobd_pin,
1278         .o_unpin                = cobd_unpin,
1279         .o_import_event         = cobd_import_event,
1280         .o_init_ea_size         = cobd_init_ea_size,
1281 };
1282
1283 struct md_ops cobd_md_ops = {
1284         .m_getstatus            = cobd_md_getstatus,
1285         .m_getattr              = cobd_md_getattr,
1286         .m_req2lustre_md        = cobd_md_req2lustre_md,
1287         .m_change_cbdata        = cobd_md_change_cbdata,
1288         .m_getattr_lock         = cobd_md_getattr_lock,
1289         .m_create               = cobd_md_create,
1290         .m_unlink               = cobd_md_unlink,
1291         .m_valid_attrs          = cobd_md_valid_attrs,
1292         .m_rename               = cobd_md_rename,
1293         .m_link                 = cobd_md_link,
1294         .m_setattr              = cobd_md_setattr,
1295         .m_readpage             = cobd_md_readpage,
1296         .m_close                = cobd_md_close,
1297         .m_done_writing         = cobd_md_done_writing,
1298         .m_sync                 = cobd_md_sync,
1299         .m_set_open_replay_data = cobd_md_set_open_replay_data,
1300         .m_clear_open_replay_data = cobd_md_clear_open_replay_data,
1301         .m_store_inode_generation = cobd_md_store_inode_generation,
1302         .m_set_lock_data        = cobd_md_set_lock_data,
1303         .m_enqueue              = cobd_md_enqueue,
1304         .m_get_real_obd         = cobd_md_get_real_obd,
1305         .m_intent_lock          = cobd_md_intent_lock,
1306         .m_change_cbdata_name   = cobd_md_change_cbdata_name,
1307 };
1308
1309 static int __init cobd_init(void)
1310 {
1311         struct lprocfs_static_vars lvars;
1312         ENTRY;
1313
1314         printk(KERN_INFO "Lustre: Caching OBD driver; info@clusterfs.com\n");
1315
1316         lprocfs_init_vars(cobd, &lvars);
1317         RETURN(class_register_type(&cobd_obd_ops, &cobd_md_ops,
1318                                    lvars.module_vars, OBD_CACHE_DEVICENAME));
1319 }
1320
1321 static void /*__exit*/ cobd_exit(void)
1322 {
1323         class_unregister_type(OBD_CACHE_DEVICENAME);
1324 }
1325
1326 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1327 MODULE_DESCRIPTION("Lustre Caching OBD driver");
1328 MODULE_LICENSE("GPL");
1329
1330 module_init(cobd_init);
1331 module_exit(cobd_exit);