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                          struct lustre_capa *capa)
 857 {
 858         struct obd_device *obd = class_exp2obd(exp);
 859         struct obd_export *cobd_exp;
 860         int rc = 0;
 861         ENTRY;
 862
 863         if (obd == NULL) {
 864                 CERROR("invalid client cookie "LPX64"\n",
 865                        exp->exp_handle.h_cookie);
 866                 RETURN(-EINVAL);
 867         }
 868         cobd_exp = cobd_get_exp(obd);
 869         rc = obd_punch(cobd_exp, oa, ea, start, end, oti, capa);
 870         RETURN(rc);
 871 }
 872
 873 static int cobd_dt_sync(struct obd_export *exp, struct obdo *oa,
 874                         struct lov_stripe_md *ea, obd_size start,
 875                         obd_size end)
 876 {
 877         struct obd_device *obd = class_exp2obd(exp);
 878         struct obd_export *cobd_exp;
 879         int rc = 0;
 880         ENTRY;
 881
 882         if (obd == NULL) {
 883                 CERROR("invalid client cookie "LPX64"\n",
 884                        exp->exp_handle.h_cookie);
 885                 RETURN(-EINVAL);
 886         }
 887         cobd_exp = cobd_get_exp(obd);
 888         rc = obd_sync(cobd_exp, oa, ea, start, end);
 889         RETURN(rc);
 890 }
 891
 892 static int cobd_dt_enqueue(struct obd_export *exp, struct lov_stripe_md *ea,
 893                            __u32 type, ldlm_policy_data_t *policy,
 894                            __u32 mode, int *flags, void *bl_cb, void *cp_cb,
 895                            void *gl_cb, void *data, __u32 lvb_len,
 896                            void *lvb_swabber, struct lustre_handle *lockh)
 897 {
 898         struct obd_device *obd = class_exp2obd(exp);
 899         struct obd_export *cobd_exp;
 900         int rc = 0;
 901         ENTRY;
 902
 903         if (obd == NULL) {
 904                 CERROR("invalid client cookie "LPX64"\n",
 905                        exp->exp_handle.h_cookie);
 906                 RETURN(-EINVAL);
 907         }
 908         cobd_exp = cobd_get_exp(obd);
 909         rc = obd_enqueue(cobd_exp, ea, type, policy, mode, flags,
 910                          bl_cb, cp_cb, gl_cb, data, lvb_len,
 911                          lvb_swabber, lockh);
 912         RETURN(rc);
 913 }
 914
 915 static int cobd_dt_match(struct obd_export *exp, struct lov_stripe_md *ea,
 916                          __u32 type, ldlm_policy_data_t *policy, __u32 mode,
 917                          int *flags, void *data, struct lustre_handle *lockh)
 918 {
 919         struct obd_device *obd = class_exp2obd(exp);
 920         struct obd_export *cobd_exp;
 921         int rc = 0;
 922         ENTRY;
 923
 924         if (obd == NULL) {
 925                 CERROR("invalid client cookie "LPX64"\n",
 926                        exp->exp_handle.h_cookie);
 927                 RETURN(-EINVAL);
 928         }
 929         cobd_exp = cobd_get_exp(obd);
 930         rc = obd_match(cobd_exp, ea, type, policy, mode, flags,
 931                        data, lockh);
 932         RETURN(rc);
 933 }
 934 static int cobd_dt_change_cbdata(struct obd_export *exp,
 935                                  struct lov_stripe_md *lsm,
 936                                  ldlm_iterator_t it, void *data)
 937 {
 938         struct obd_device *obd = class_exp2obd(exp);
 939         struct obd_export *cobd_exp;
 940         int rc = 0;
 941         ENTRY;
 942
 943         if (obd == NULL) {
 944                 CERROR("invalid client cookie "LPX64"\n",
 945                        exp->exp_handle.h_cookie);
 946                 RETURN(-EINVAL);
 947         }
 948         cobd_exp = cobd_get_exp(obd);
 949         rc = obd_change_cbdata(cobd_exp, lsm, it, data);
 950         RETURN(rc);
 951 }
 952
 953 static int cobd_dt_cancel(struct obd_export *exp,
 954                           struct lov_stripe_md *ea, __u32 mode,
 955                           struct lustre_handle *lockh)
 956 {
 957         struct obd_device *obd = class_exp2obd(exp);
 958         struct obd_export *cobd_exp;
 959         int rc = 0;
 960         ENTRY;
 961
 962         if (obd == NULL) {
 963                 CERROR("invalid client cookie "LPX64"\n",
 964                        exp->exp_handle.h_cookie);
 965                 RETURN(-EINVAL);
 966         }
 967         cobd_exp = cobd_get_exp(obd);
 968         rc = obd_cancel(cobd_exp, ea, mode, lockh);
 969         RETURN(rc);
 970 }
 971
 972 static int cobd_dt_cancel_unused(struct obd_export *exp,
 973                                  struct lov_stripe_md *ea,
 974                                  int flags, void *opaque)
 975 {
 976         struct obd_device *obd = class_exp2obd(exp);
 977         struct obd_export *cobd_exp;
 978         int rc = 0;
 979         ENTRY;
 980
 981         if (obd == NULL) {
 982                 CERROR("invalid client cookie "LPX64"\n",
 983                        exp->exp_handle.h_cookie);
 984                 RETURN(-EINVAL);
 985         }
 986         cobd_exp = cobd_get_exp(obd);
 987         rc = obd_cancel_unused(cobd_exp, ea, flags, opaque);
 988         RETURN(rc);
 989 }
 990
 991 static int cobd_dt_preprw(int cmd, struct obd_export *exp,
 992                           struct obdo *oa, int objcount,
 993                           struct obd_ioobj *obj, int niocount,
 994                           struct niobuf_remote *nb,
 995                           struct niobuf_local *res,
 996                           struct obd_trans_info *oti,
 997                           struct lustre_capa *capa)
 998 {
 999         struct obd_device *obd = class_exp2obd(exp);
1000         struct obd_export *cobd_exp;
1001         int rc = 0;
1002         ENTRY;
1003
1004         if (obd == NULL) {
1005                 CERROR("invalid client cookie "LPX64"\n",
1006                        exp->exp_handle.h_cookie);
1007                 RETURN(-EINVAL);
1008         }
1009         cobd_exp = cobd_get_exp(obd);
1010         rc = obd_preprw(cmd, cobd_exp, oa, objcount, obj,
1011                           niocount, nb, res, oti, capa);
1012         RETURN(rc);
1013 }
1014
1015 static int cobd_dt_commitrw(int cmd, struct obd_export *exp, struct obdo *oa,
1016                             int objcount, struct obd_ioobj *obj,
1017                             int niocount, struct niobuf_local *local,
1018                             struct obd_trans_info *oti, int rc)
1019 {
1020         struct obd_device *obd = class_exp2obd(exp);
1021         struct obd_export *cobd_exp;
1022         int err = 0;
1023         ENTRY;
1024
1025         if (obd == NULL) {
1026                 CERROR("invalid client cookie "LPX64"\n",
1027                        exp->exp_handle.h_cookie);
1028                 RETURN(-EINVAL);
1029         }
1030         cobd_exp = cobd_get_exp(obd);
1031         err = obd_commitrw(cmd, cobd_exp, oa, objcount, obj,
1032                            niocount, local, oti, rc);
1033         RETURN(err);
1034 }
1035
1036 static int cobd_dt_adjust_kms(struct obd_export *exp,
1037                               struct lov_stripe_md *lsm,
1038                               obd_off size, int shrink)
1039 {
1040         struct obd_device *obd = class_exp2obd(exp);
1041         struct obd_export *cobd_exp;
1042         int rc = 0;
1043         ENTRY;
1044
1045         if (obd == NULL) {
1046                 CERROR("invalid client cookie "LPX64"\n",
1047                        exp->exp_handle.h_cookie);
1048                 RETURN(-EINVAL);
1049         }
1050         cobd_exp = cobd_get_exp(obd);
1051         rc = obd_adjust_kms(cobd_exp, lsm, size, shrink);
1052
1053         RETURN(rc);
1054 }
1055
1056 static int cobd_dt_llog_init(struct obd_device *obd,
1057                              struct obd_llogs *llogs,
1058                              struct obd_device *disk_obd,
1059                              int count, struct llog_catid *logid)
1060 {
1061         struct obd_export *cobd_exp;
1062         struct obd_device *cobd_obd;
1063         int rc = 0;
1064         ENTRY;
1065
1066         cobd_exp = cobd_get_exp(obd);
1067         cobd_obd = class_exp2obd(cobd_exp);
1068
1069         rc = obd_llog_init(cobd_obd, &cobd_obd->obd_llogs,
1070                            disk_obd, count, logid);
1071         RETURN(rc);
1072 }
1073
1074 static int cobd_dt_llog_finish(struct obd_device *obd,
1075                                struct obd_llogs *llogs,
1076                                int count)
1077 {
1078         struct obd_export *cobd_exp;
1079         struct obd_device *cobd_obd;
1080         int rc = 0;
1081         ENTRY;
1082
1083         cobd_exp = cobd_get_exp(obd);
1084         cobd_obd = class_exp2obd(cobd_exp);
1085
1086         rc = obd_llog_finish(cobd_obd, &cobd_obd->obd_llogs, count);
1087         RETURN(rc);
1088 }
1089
1090 static int cobd_dt_notify(struct obd_device *obd, struct obd_device *watched,
1091                           int active, void *data)
1092 {
1093         struct obd_export *cobd_exp;
1094         int rc = 0;
1095         ENTRY;
1096
1097         cobd_exp = cobd_get_exp(obd);
1098         rc = obd_notify(class_exp2obd(cobd_exp), watched, active, data);
1099         RETURN(rc);
1100 }
1101
1102 static int cobd_dt_pin(struct obd_export *exp, obd_id ino, __u32 gen,
1103                        int type, struct obd_client_handle *handle,
1104                        int flag)
1105 {
1106         struct obd_device *obd = class_exp2obd(exp);
1107         struct obd_export *cobd_exp;
1108         int rc = 0;
1109         ENTRY;
1110
1111         if (obd == NULL) {
1112                 CERROR("invalid client cookie "LPX64"\n",
1113                        exp->exp_handle.h_cookie);
1114                 RETURN(-EINVAL);
1115         }
1116         cobd_exp = cobd_get_exp(obd);
1117         rc = obd_pin(cobd_exp, ino, gen, type, handle, flag);
1118         RETURN(rc);
1119 }
1120
1121 static int cobd_dt_unpin(struct obd_export *exp,
1122                          struct obd_client_handle *handle,
1123                          int flag)
1124 {
1125         struct obd_device *obd = class_exp2obd(exp);
1126         struct obd_export *cobd_exp;
1127         int rc = 0;
1128         ENTRY;
1129
1130         if (obd == NULL) {
1131                 CERROR("invalid client cookie "LPX64"\n",
1132                        exp->exp_handle.h_cookie);
1133                 RETURN(-EINVAL);
1134         }
1135         cobd_exp = cobd_get_exp(obd);
1136         rc = obd_unpin(cobd_exp, handle, flag);
1137         RETURN(rc);
1138 }
1139
1140 static int cobd_dt_init_ea_size(struct obd_export *exp, int easize,
1141                                 int cookiesize)
1142 {
1143         struct obd_export *cobd_exp;
1144         int rc = 0;
1145         ENTRY;
1146
1147         cobd_exp = cobd_get_exp(exp->exp_obd);
1148         rc = obd_init_ea_size(cobd_exp, easize, cookiesize);
1149         RETURN(rc);
1150 }
1151
1152 static int cobd_dt_import_event(struct obd_device *obd,
1153                                 struct obd_import *imp,
1154                                 enum obd_import_event event)
1155 {
1156         struct obd_export *cobd_exp;
1157         ENTRY;
1158
1159         cobd_exp = cobd_get_exp(obd);
1160         obd_import_event(class_exp2obd(cobd_exp), imp, event);
1161         RETURN(0);
1162 }
1163
1164 static int cobd_md_getstatus(struct obd_export *exp,
1165                              struct lustre_id *rootid)
1166 {
1167         struct obd_device *obd = class_exp2obd(exp);
1168         struct obd_export *cobd_exp;
1169         int rc = 0;
1170         ENTRY;
1171
1172         if (obd == NULL) {
1173                 CERROR("invalid client cookie "LPX64"\n",
1174                        exp->exp_handle.h_cookie);
1175                 RETURN(-EINVAL);
1176         }
1177         cobd_exp = cobd_get_exp(obd);
1178         rc = md_getstatus(cobd_exp, rootid);
1179         RETURN(rc);
1180 }
1181
1182 static int cobd_md_getattr(struct obd_export *exp, struct lustre_id *id,
1183                            __u64 valid, const char *xattr_name,
1184                            const void *xattr_data, unsigned int xattr_datalen,
1185                            unsigned int ea_size, struct obd_capa *ocapa,
1186                            struct ptlrpc_request **request)
1187 {
1188         struct obd_device *obd = class_exp2obd(exp);
1189         struct obd_export *cobd_exp;
1190         int rc = 0;
1191         ENTRY;
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         rc = md_getattr(cobd_exp, id, valid, xattr_name, xattr_data,
1200                           xattr_datalen, ea_size, ocapa, request);
1201         RETURN(rc);
1202 }
1203
1204 static int cobd_md_req2lustre_md(struct obd_export *mdc_exp,
1205                                  struct ptlrpc_request *req,
1206                                  unsigned int offset,
1207                                  struct obd_export *osc_exp,
1208                                  struct lustre_md *md)
1209 {
1210         struct obd_device *obd = class_exp2obd(mdc_exp);
1211         struct obd_export *cobd_exp;
1212         int rc = 0;
1213         ENTRY;
1214
1215         if (obd == NULL) {
1216                 CERROR("invalid client cookie "LPX64"\n",
1217                        mdc_exp->exp_handle.h_cookie);
1218                 RETURN(-EINVAL);
1219         }
1220         cobd_exp = cobd_get_exp(obd);
1221         rc = md_req2lustre_md(cobd_exp, req, offset, osc_exp, md);
1222         RETURN(rc);
1223 }
1224
1225 static int cobd_md_change_cbdata(struct obd_export *exp, struct lustre_id *id,
1226                                  ldlm_iterator_t it, void *data)
1227 {
1228         struct obd_device *obd = class_exp2obd(exp);
1229         struct obd_export *cobd_exp;
1230         int rc = 0;
1231         ENTRY;
1232
1233         if (obd == NULL) {
1234                 CERROR("invalid client cookie "LPX64"\n",
1235                        exp->exp_handle.h_cookie);
1236                 RETURN(-EINVAL);
1237         }
1238         cobd_exp = cobd_get_exp(obd);
1239         rc = md_change_cbdata(cobd_exp, id, it, data);
1240         RETURN(rc);
1241 }
1242
1243 static int cobd_md_getattr_lock(struct obd_export *exp, struct lustre_id *id,
1244                                 char *filename, int namelen, __u64 valid,
1245                                 unsigned int ea_size, struct ptlrpc_request **request)
1246 {
1247         struct obd_device *obd = class_exp2obd(exp);
1248         struct obd_export *cobd_exp;
1249         int rc = 0;
1250         ENTRY;
1251
1252         if (obd == NULL) {
1253                 CERROR("invalid client cookie "LPX64"\n",
1254                        exp->exp_handle.h_cookie);
1255                 RETURN(-EINVAL);
1256         }
1257         cobd_exp = cobd_get_exp(obd);
1258         rc = md_getattr_lock(cobd_exp, id, filename, namelen,
1259                              valid, ea_size, request);
1260         RETURN(rc);
1261 }
1262
1263 static int cobd_md_create(struct obd_export *exp, struct mdc_op_data *op_data,
1264                           const void *data, int datalen, int mode,
1265                           __u32 uid, __u32 gid, __u64 rdev,
1266                           struct ptlrpc_request **request)
1267 {
1268         struct obd_device *obd = class_exp2obd(exp);
1269         struct obd_export *cobd_exp;
1270         int rc = 0;
1271         ENTRY;
1272
1273         if (obd == NULL) {
1274                 CERROR("invalid client cookie "LPX64"\n",
1275                        exp->exp_handle.h_cookie);
1276                 RETURN(-EINVAL);
1277         }
1278         cobd_exp = cobd_get_exp(obd);
1279         rc = md_create(cobd_exp, op_data, data, datalen, mode,
1280                        uid, gid, rdev, request);
1281         RETURN(rc);
1282 }
1283
1284 static int cobd_md_unlink(struct obd_export *exp,
1285                           struct mdc_op_data *data,
1286                           struct ptlrpc_request **request)
1287 {
1288         struct obd_device *obd = class_exp2obd(exp);
1289         struct obd_export *cobd_exp;
1290         int rc = 0;
1291         ENTRY;
1292
1293         if (obd == NULL) {
1294                 CERROR("invalid client cookie "LPX64"\n",
1295                        exp->exp_handle.h_cookie);
1296                 RETURN(-EINVAL);
1297         }
1298         cobd_exp = cobd_get_exp(obd);
1299         rc = md_unlink(cobd_exp, data, request);
1300         RETURN(rc);
1301 }
1302
1303 static int cobd_md_valid_attrs(struct obd_export *exp,
1304                                struct lustre_id *id)
1305 {
1306         struct obd_device *obd = class_exp2obd(exp);
1307         struct obd_export *cobd_exp;
1308         int rc = 0;
1309         ENTRY;
1310
1311         if (obd == NULL) {
1312                 CERROR("invalid client cookie "LPX64"\n",
1313                        exp->exp_handle.h_cookie);
1314                 RETURN(-EINVAL);
1315         }
1316         cobd_exp = cobd_get_exp(obd);
1317         rc = md_valid_attrs(cobd_exp, id);
1318         RETURN(rc);
1319 }
1320
1321 static int cobd_md_rename(struct obd_export *exp, struct mdc_op_data *data,
1322                           const char *old, int oldlen, const char *new,
1323                           int newlen, struct ptlrpc_request **request)
1324 {
1325         struct obd_device *obd = class_exp2obd(exp);
1326         struct obd_export *cobd_exp;
1327         int rc = 0;
1328         ENTRY;
1329
1330         if (obd == NULL) {
1331                 CERROR("invalid client cookie "LPX64"\n",
1332                        exp->exp_handle.h_cookie);
1333                 RETURN(-EINVAL);
1334         }
1335         cobd_exp = cobd_get_exp(obd);
1336         rc = md_rename(cobd_exp, data, old, oldlen, new, newlen, request);
1337         RETURN(rc);
1338 }
1339
1340 static int cobd_md_link(struct obd_export *exp, struct mdc_op_data *data,
1341                         struct ptlrpc_request **request)
1342 {
1343         struct obd_device *obd = class_exp2obd(exp);
1344         struct obd_export *cobd_exp;
1345         int rc = 0;
1346         ENTRY;
1347
1348         if (obd == NULL) {
1349                 CERROR("invalid client cookie "LPX64"\n",
1350                        exp->exp_handle.h_cookie);
1351                 RETURN(-EINVAL);
1352         }
1353         cobd_exp = cobd_get_exp(obd);
1354         rc = md_link(cobd_exp, data, request);
1355         RETURN(rc);
1356 }
1357
1358 static int cobd_md_setattr(struct obd_export *exp, struct mdc_op_data *data,
1359                            struct iattr *iattr, void *ea, int ealen, void *ea2,
1360                            int ea2len, void *ea3, int ea3len,
1361                            struct ptlrpc_request **request)
1362 {
1363         struct obd_device *obd = class_exp2obd(exp);
1364         struct obd_export *cobd_exp;
1365         int rc = 0;
1366         ENTRY;
1367
1368         if (obd == NULL) {
1369                 CERROR("invalid client cookie "LPX64"\n",
1370                        exp->exp_handle.h_cookie);
1371                 RETURN(-EINVAL);
1372         }
1373         cobd_exp = cobd_get_exp(obd);
1374         rc = md_setattr(cobd_exp, data, iattr, ea,
1375                           ealen, ea2, ea2len, ea3, ea3len, request);
1376         RETURN(rc);
1377 }
1378
1379 static int cobd_md_readpage(struct obd_export *exp,
1380                             struct lustre_id *mdc_id,
1381                             __u64 offset, struct page *page,
1382                             struct ptlrpc_request **request)
1383 {
1384         struct obd_device *obd = class_exp2obd(exp);
1385         struct obd_export *cobd_exp;
1386         int rc = 0;
1387         ENTRY;
1388
1389         if (obd == NULL) {
1390                 CERROR("invalid client cookie "LPX64"\n",
1391                        exp->exp_handle.h_cookie);
1392                 RETURN(-EINVAL);
1393         }
1394         cobd_exp = cobd_get_exp(obd);
1395         rc = md_readpage(cobd_exp, mdc_id, offset, page, request);
1396         RETURN(rc);
1397 }
1398
1399 static int cobd_md_close(struct obd_export *exp, struct mdc_op_data *op_data,
1400                          struct obd_client_handle *och,
1401                          struct ptlrpc_request **request)
1402 {
1403         struct obd_device *obd = class_exp2obd(exp);
1404         struct obd_export *cobd_exp;
1405         int rc = 0;
1406         ENTRY;
1407
1408         if (obd == NULL) {
1409                 CERROR("invalid client cookie "LPX64"\n",
1410                        exp->exp_handle.h_cookie);
1411                 RETURN(-EINVAL);
1412         }
1413         cobd_exp = cobd_get_exp(obd);
1414         rc = md_close(cobd_exp, op_data, och, request);
1415         RETURN(rc);
1416 }
1417
1418 static int cobd_md_done_writing(struct obd_export *exp,
1419                                 struct obdo *obdo)
1420 {
1421         struct obd_device *obd = class_exp2obd(exp);
1422         struct obd_export *cobd_exp;
1423         int rc = 0;
1424         ENTRY;
1425
1426         if (obd == NULL) {
1427                 CERROR("invalid client cookie "LPX64"\n",
1428                        exp->exp_handle.h_cookie);
1429                 RETURN(-EINVAL);
1430         }
1431         cobd_exp = cobd_get_exp(obd);
1432         rc = md_done_writing(cobd_exp, obdo);
1433         RETURN(rc);
1434 }
1435
1436 static int cobd_md_sync(struct obd_export *exp, struct lustre_id *id,
1437                         struct ptlrpc_request **request)
1438 {
1439         struct obd_device *obd = class_exp2obd(exp);
1440         struct obd_export *cobd_exp;
1441         int rc = 0;
1442         ENTRY;
1443
1444         if (obd == NULL) {
1445                 CERROR("invalid client cookie "LPX64"\n",
1446                        exp->exp_handle.h_cookie);
1447                 RETURN(-EINVAL);
1448         }
1449         cobd_exp = cobd_get_exp(obd);
1450         rc = md_sync(cobd_exp, id, request);
1451         RETURN(rc);
1452 }
1453
1454 static int cobd_md_set_open_replay_data(struct obd_export *exp,
1455                                         struct obd_client_handle *och,
1456                                         struct ptlrpc_request *open_req)
1457 {
1458         struct obd_device *obd = class_exp2obd(exp);
1459         struct obd_export *cobd_exp;
1460         int rc = 0;
1461         ENTRY;
1462
1463         if (obd == NULL) {
1464                 CERROR("invalid client cookie "LPX64"\n",
1465                        exp->exp_handle.h_cookie);
1466                 RETURN(-EINVAL);
1467         }
1468         cobd_exp = cobd_get_exp(obd);
1469         rc = md_set_open_replay_data(cobd_exp, och, open_req);
1470         RETURN(rc);
1471 }
1472
1473 static int cobd_md_clear_open_replay_data(struct obd_export *exp,
1474                                           struct obd_client_handle *och)
1475 {
1476         struct obd_device *obd = class_exp2obd(exp);
1477         struct obd_export *cobd_exp;
1478         int rc = 0;
1479         ENTRY;
1480
1481         if (obd == NULL) {
1482                 CERROR("invalid client cookie "LPX64"\n",
1483                        exp->exp_handle.h_cookie);
1484                 RETURN(-EINVAL);
1485         }
1486         cobd_exp = cobd_get_exp(obd);
1487         rc = md_clear_open_replay_data(cobd_exp, och);
1488         RETURN(rc);
1489 }
1490
1491 static int cobd_md_store_inode_generation(struct obd_export *exp,
1492                                           struct ptlrpc_request *req,
1493                                           int reqoff, int repoff)
1494 {
1495         struct obd_device *obd = class_exp2obd(exp);
1496         struct obd_export *cobd_exp;
1497         int rc = 0;
1498         ENTRY;
1499
1500         if (obd == NULL) {
1501                 CERROR("invalid client cookie "LPX64"\n",
1502                        exp->exp_handle.h_cookie);
1503                 RETURN(-EINVAL);
1504         }
1505         cobd_exp = cobd_get_exp(obd);
1506         rc = md_store_inode_generation(cobd_exp, req, reqoff, repoff);
1507         RETURN(rc);
1508 }
1509
1510 static int cobd_md_set_lock_data(struct obd_export *exp,
1511                                  __u64 *l, void *data)
1512 {
1513         struct obd_device *obd = class_exp2obd(exp);
1514         struct obd_export *cobd_exp;
1515         int rc = 0;
1516         ENTRY;
1517
1518         if (obd == NULL) {
1519                 CERROR("invalid client cookie "LPX64"\n",
1520                        exp->exp_handle.h_cookie);
1521                 RETURN(-EINVAL);
1522         }
1523         cobd_exp = cobd_get_exp(obd);
1524         rc = md_set_lock_data(cobd_exp, l, data);
1525         RETURN(rc);
1526 }
1527
1528 static int cobd_md_enqueue(struct obd_export *exp, int lock_type,
1529                            struct lookup_intent *it, int lock_mode,
1530                            struct mdc_op_data *data, struct lustre_handle *lockh,
1531                            void *lmm, int lmmsize,
1532                            ldlm_completion_callback cb_completion,
1533                            ldlm_blocking_callback cb_blocking, void *cb_data)
1534 {
1535         struct obd_device *obd = class_exp2obd(exp);
1536         struct obd_export *cobd_exp;
1537         int rc = 0;
1538         ENTRY;
1539
1540         if (obd == NULL) {
1541                 CERROR("invalid client cookie "LPX64"\n",
1542                        exp->exp_handle.h_cookie);
1543                 RETURN(-EINVAL);
1544         }
1545         cobd_exp = cobd_get_exp(obd);
1546         rc = md_enqueue(cobd_exp, lock_type, it, lock_mode, data,
1547                         lockh, lmm, lmmsize, cb_completion, cb_blocking,
1548                         cb_data);
1549         RETURN(rc);
1550 }
1551
1552 static int cobd_md_intent_lock(struct obd_export *exp, struct lustre_id *pid,
1553                                const char *name, int len, void *lmm, int lmmsize,
1554                                struct lustre_id *cid, struct lookup_intent *it,
1555                                int lookup_flags, struct ptlrpc_request **reqp,
1556                                ldlm_blocking_callback cb_blocking)
1557 {
1558         struct obd_device *obd = class_exp2obd(exp);
1559         struct obd_export *cobd_exp;
1560         int rc = 0;
1561         ENTRY;
1562
1563         if (obd == NULL) {
1564                 CERROR("invalid client cookie "LPX64"\n",
1565                        exp->exp_handle.h_cookie);
1566                 RETURN(-EINVAL);
1567         }
1568         lookup_flags |= LOOKUP_COBD;
1569         cobd_exp = cobd_get_exp(obd);
1570
1571         rc = md_intent_lock(cobd_exp, pid, name, len, lmm, lmmsize,
1572                             cid, it, lookup_flags, reqp, cb_blocking);
1573         RETURN(rc);
1574 }
1575
1576 static struct obd_device *cobd_md_get_real_obd(struct obd_export *exp,
1577                                                struct lustre_id *id)
1578 {
1579         struct obd_device *obd = class_exp2obd(exp);
1580         struct obd_export *cobd_exp;
1581         ENTRY;
1582
1583         if (obd == NULL) {
1584                 CERROR("invalid client cookie "LPX64"\n",
1585                        exp->exp_handle.h_cookie);
1586                 RETURN(NULL);
1587         }
1588         cobd_exp = cobd_get_exp(obd);
1589         RETURN(md_get_real_obd(cobd_exp, id));
1590 }
1591
1592 static int cobd_md_change_cbdata_name(struct obd_export *exp,
1593                                       struct lustre_id *id, char *name,
1594                                       int namelen, struct lustre_id *id2,
1595                                       ldlm_iterator_t it, void *data)
1596 {
1597         struct obd_device *obd = class_exp2obd(exp);
1598         struct obd_export *cobd_exp;
1599         int rc = 0;
1600
1601         if (obd == NULL) {
1602                 CERROR("invalid client cookie "LPX64"\n",
1603                        exp->exp_handle.h_cookie);
1604                 RETURN(-EINVAL);
1605         }
1606         cobd_exp = cobd_get_exp(obd);
1607         rc = md_change_cbdata_name(cobd_exp, id, name, namelen,
1608                                    id2, it, data);
1609         RETURN(rc);
1610 }
1611
1612 static struct obd_ops cobd_obd_ops = {
1613         .o_owner                  = THIS_MODULE,
1614         .o_attach                 = cobd_attach,
1615         .o_detach                 = cobd_detach,
1616         .o_setup                  = cobd_setup,
1617         .o_cleanup                = cobd_cleanup,
1618         .o_connect                = cobd_connect,
1619         .o_disconnect             = cobd_disconnect,
1620         .o_set_info               = cobd_set_info,
1621         .o_get_info               = cobd_get_info,
1622         .o_statfs                 = cobd_statfs,
1623         .o_iocontrol              = cobd_iocontrol,
1624
1625         .o_packmd                 = cobd_dt_packmd,
1626         .o_unpackmd               = cobd_dt_unpackmd,
1627         .o_create                 = cobd_dt_create,
1628         .o_destroy                = cobd_dt_destroy,
1629         .o_precleanup             = cobd_dt_precleanup,
1630         .o_getattr                = cobd_dt_getattr,
1631         .o_getattr_async          = cobd_dt_getattr_async,
1632         .o_setattr                = cobd_dt_setattr,
1633         .o_brw                    = cobd_dt_brw,
1634         .o_brw_async              = cobd_dt_brw_async,
1635         .o_prep_async_page        = cobd_dt_prep_async_page,
1636         .o_queue_async_io         = cobd_dt_queue_async_io,
1637         .o_set_async_flags        = cobd_dt_set_async_flags,
1638         .o_queue_group_io         = cobd_dt_queue_group_io,
1639         .o_trigger_group_io       = cobd_dt_trigger_group_io,
1640         .o_teardown_async_page    = cobd_dt_teardown_async_page,
1641         .o_preprw                 = cobd_dt_preprw,
1642         .o_punch                  = cobd_dt_punch,
1643         .o_sync                   = cobd_dt_sync,
1644         .o_enqueue                = cobd_dt_enqueue,
1645         .o_match                  = cobd_dt_match,
1646         .o_change_cbdata          = cobd_dt_change_cbdata,
1647         .o_cancel                 = cobd_dt_cancel,
1648         .o_cancel_unused          = cobd_dt_cancel_unused,
1649         .o_commitrw               = cobd_dt_commitrw,
1650         .o_llog_init              = cobd_dt_llog_init,
1651         .o_llog_finish            = cobd_dt_llog_finish,
1652         .o_notify                 = cobd_dt_notify,
1653         .o_pin                    = cobd_dt_pin,
1654         .o_unpin                  = cobd_dt_unpin,
1655         .o_import_event           = cobd_dt_import_event,
1656         .o_init_ea_size           = cobd_dt_init_ea_size,
1657         .o_adjust_kms             = cobd_dt_adjust_kms,
1658 };
1659
1660 struct md_ops cobd_md_ops = {
1661         .m_getstatus              = cobd_md_getstatus,
1662         .m_getattr                = cobd_md_getattr,
1663         .m_req2lustre_md          = cobd_md_req2lustre_md,
1664         .m_change_cbdata          = cobd_md_change_cbdata,
1665         .m_getattr_lock           = cobd_md_getattr_lock,
1666         .m_create                 = cobd_md_create,
1667         .m_unlink                 = cobd_md_unlink,
1668         .m_valid_attrs            = cobd_md_valid_attrs,
1669         .m_rename                 = cobd_md_rename,
1670         .m_link                   = cobd_md_link,
1671         .m_setattr                = cobd_md_setattr,
1672         .m_readpage               = cobd_md_readpage,
1673         .m_close                  = cobd_md_close,
1674         .m_done_writing           = cobd_md_done_writing,
1675         .m_sync                   = cobd_md_sync,
1676         .m_set_open_replay_data   = cobd_md_set_open_replay_data,
1677         .m_clear_open_replay_data = cobd_md_clear_open_replay_data,
1678         .m_store_inode_generation = cobd_md_store_inode_generation,
1679         .m_set_lock_data          = cobd_md_set_lock_data,
1680         .m_enqueue                = cobd_md_enqueue,
1681         .m_get_real_obd           = cobd_md_get_real_obd,
1682         .m_intent_lock            = cobd_md_intent_lock,
1683         .m_change_cbdata_name     = cobd_md_change_cbdata_name,
1684 };
1685
1686 static int __init cobd_init(void)
1687 {
1688         struct lprocfs_static_vars lvars;
1689         ENTRY;
1690
1691         printk(KERN_INFO "Lustre: Caching OBD driver; info@clusterfs.com\n");
1692
1693         lprocfs_init_vars(cobd, &lvars);
1694         RETURN(class_register_type(&cobd_obd_ops, &cobd_md_ops,
1695                                    lvars.module_vars, OBD_CACHE_DEVICENAME));
1696 }
1697
1698 static void /*__exit*/ cobd_exit(void)
1699 {
1700         class_unregister_type(OBD_CACHE_DEVICENAME);
1701 }
1702
1703 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1704 MODULE_DESCRIPTION("Lustre Caching OBD driver");
1705 MODULE_LICENSE("GPL");
1706
1707 module_init(cobd_init);
1708 module_exit(cobd_exit);