lustre/include/obd_class.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22
  23 #ifndef __CLASS_OBD_H
  24 #define __CLASS_OBD_H
  25
  26 #include <obd_support.h>
  27 #include <lustre_import.h>
  28 #include <lustre_net.h>
  29 #include <obd.h>
  30 #include <lustre_lib.h>
  31 #include <lustre/lustre_idl.h>
  32 #include <lprocfs_status.h>
  33
  34 #if defined(__linux__)
  35 #include <linux/obd_class.h>
  36 #elif defined(__APPLE__)
  37 #include <darwin/obd_class.h>
  38 #elif defined(__WINNT__)
  39 #include <winnt/obd_class.h>
  40 #else
  41 #error Unsupported operating system.
  42 #endif
  43
  44 /* OBD Device Declarations */
  45 extern struct obd_device *obd_devs[MAX_OBD_DEVICES];
  46 extern spinlock_t obd_dev_lock;
  47
  48 /* OBD Operations Declarations */
  49 extern struct obd_device *class_conn2obd(struct lustre_handle *);
  50 extern struct obd_device *class_exp2obd(struct obd_export *);
  51
  52 /* genops.c */
  53 struct obd_export *class_conn2export(struct lustre_handle *);
  54 int class_register_type(struct obd_ops *ops, struct lprocfs_vars *,
  55                         const char *nm);
  56 int class_unregister_type(const char *nm);
  57
  58 struct obd_device *class_newdev(const char *type_name, const char *name);
  59 void class_release_dev(struct obd_device *obd);
  60
  61 int class_name2dev(const char *name);
  62 struct obd_device *class_name2obd(const char *name);
  63 int class_uuid2dev(struct obd_uuid *uuid);
  64 struct obd_device *class_uuid2obd(struct obd_uuid *uuid);
  65 void class_obd_list(void);
  66 struct obd_device * class_find_client_obd(struct obd_uuid *tgt_uuid,
  67                                           const char * typ_name,
  68                                           struct obd_uuid *grp_uuid);
  69 struct obd_device * class_find_client_notype(struct obd_uuid *tgt_uuid,
  70                                              struct obd_uuid *grp_uuid);
  71 struct obd_device * class_devices_in_group(struct obd_uuid *grp_uuid,
  72                                            int *next);
  73 struct obd_device * class_num2obd(int num);
  74
  75 int oig_init(struct obd_io_group **oig);
  76 int oig_add_one(struct obd_io_group *oig, struct oig_callback_context *occ);
  77 void oig_complete_one(struct obd_io_group *oig,
  78                       struct oig_callback_context *occ, int rc);
  79 void oig_release(struct obd_io_group *oig);
  80 int oig_wait(struct obd_io_group *oig);
  81
  82 char *obd_export_nid2str(struct obd_export *exp);
  83
  84 int obd_export_evict_by_nid(struct obd_device *obd, char *nid);
  85 int obd_export_evict_by_uuid(struct obd_device *obd, char *uuid);
  86
  87 /* obd_config.c */
  88 int class_process_config(struct lustre_cfg *lcfg);
  89 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
  90                              struct lustre_cfg *lcfg, void *data);
  91 int class_attach(struct lustre_cfg *lcfg);
  92 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
  93 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg);
  94 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg);
  95 struct obd_device *class_incref(struct obd_device *obd);
  96 void class_decref(struct obd_device *obd);
  97
  98 #define CFG_F_START     0x01   /* Set when we start updating from a log */
  99 #define CFG_F_MARKER    0x02   /* We are within a maker */
 100 #define CFG_F_SKIP      0x04   /* We should ignore this cfg command */
 101 #define CFG_F_COMPAT146 0x08   /* Allow old-style logs */
 102 #define CFG_F_EXCLUDE   0x10   /* OST exclusion list */
 103
 104 /* Passed as data param to class_config_parse_llog */
 105 struct config_llog_instance {
 106         char *              cfg_instance;
 107         struct super_block *cfg_sb;
 108         struct obd_uuid     cfg_uuid;
 109         int                 cfg_last_idx; /* for partial llog processing */
 110         int                 cfg_flags;
 111 };
 112 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
 113                             struct config_llog_instance *cfg);
 114 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
 115                            struct config_llog_instance *cfg);
 116
 117 /* list of active configuration logs  */
 118 struct config_llog_data {
 119         char               *cld_logname;
 120         struct ldlm_res_id  cld_resid;
 121         struct config_llog_instance cld_cfg;
 122         struct list_head    cld_list_chain;
 123         atomic_t            cld_refcount;
 124         struct obd_export  *cld_mgcexp;
 125         unsigned int        cld_stopping:1; /* we were told to stop watching */
 126         unsigned int        cld_lostlock:1; /* lock not requeued */
 127 };
 128
 129 struct lustre_profile {
 130         struct list_head lp_list;
 131         char * lp_profile;
 132         char * lp_osc;
 133         char * lp_mdc;
 134 };
 135
 136 struct lustre_profile *class_get_profile(char * prof);
 137 void class_del_profile(char *prof);
 138 void class_del_profiles(void);
 139
 140 #define class_export_rpc_get(exp)                                       \
 141 ({                                                                      \
 142         atomic_inc(&(exp)->exp_rpc_count);                              \
 143         CDEBUG(D_INFO, "RPC GETting export %p : new rpc_count %d\n",    \
 144                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 145         class_export_get(exp);                                          \
 146 })
 147
 148 #define class_export_rpc_put(exp)                                       \
 149 ({                                                                      \
 150         atomic_dec(&(exp)->exp_rpc_count);                              \
 151         CDEBUG(D_INFO, "RPC PUTting export %p : new rpc_count %d\n",    \
 152                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 153         class_export_put(exp);                                          \
 154 })
 155
 156 /* genops.c */
 157 #define class_export_get(exp)                                                  \
 158 ({                                                                             \
 159         struct obd_export *exp_ = exp;                                         \
 160         atomic_inc(&exp_->exp_refcount);                                       \
 161         CDEBUG(D_INFO, "GETting export %p : new refcount %d\n", exp_,          \
 162                atomic_read(&exp_->exp_refcount));                              \
 163         exp_;                                                                  \
 164 })
 165
 166 #define class_export_put(exp)                                                  \
 167 do {                                                                           \
 168         LASSERT((exp) != NULL);                                                \
 169         CDEBUG(D_INFO, "PUTting export %p : new refcount %d\n", (exp),         \
 170                atomic_read(&(exp)->exp_refcount) - 1);                         \
 171         LASSERT(atomic_read(&(exp)->exp_refcount) > 0);                        \
 172         LASSERT(atomic_read(&(exp)->exp_refcount) < 0x5a5a5a);                 \
 173         __class_export_put(exp);                                               \
 174 } while (0)
 175
 176 void __class_export_put(struct obd_export *);
 177 struct obd_export *class_new_export(struct obd_device *obddev,
 178                                     struct obd_uuid *cluuid);
 179 void class_unlink_export(struct obd_export *exp);
 180
 181 struct obd_import *class_import_get(struct obd_import *);
 182 void class_import_put(struct obd_import *);
 183 struct obd_import *class_new_import(struct obd_device *obd);
 184 void class_destroy_import(struct obd_import *exp);
 185
 186 struct obd_type *class_search_type(const char *name);
 187 struct obd_type *class_get_type(const char *name);
 188 void class_put_type(struct obd_type *type);
 189 int class_connect(struct lustre_handle *conn, struct obd_device *obd,
 190                   struct obd_uuid *cluuid);
 191 int class_disconnect(struct obd_export *exp);
 192 void class_fail_export(struct obd_export *exp);
 193 void class_disconnect_exports(struct obd_device *obddev);
 194 void class_disconnect_stale_exports(struct obd_device *obddev);
 195 int class_manual_cleanup(struct obd_device *obd);
 196
 197 /* obdo.c */
 198 void obdo_cpy_md(struct obdo *dst, struct obdo *src, obd_flag valid);
 199 void obdo_to_ioobj(struct obdo *oa, struct obd_ioobj *ioobj);
 200
 201
 202 #define OBT(dev)        (dev)->obd_type
 203 #define OBP(dev, op)    (dev)->obd_type->typ_ops->o_ ## op
 204 #define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
 205
 206 /* Ensure obd_setup: used for cleanup which must be called
 207    while obd is stopping */
 208 #define OBD_CHECK_DEV(obd)                                      \
 209 do {                                                            \
 210         if (!(obd)) {                                           \
 211                 CERROR("NULL device\n");                        \
 212                 RETURN(-ENODEV);                                \
 213         }                                                       \
 214 } while (0)
 215
 216 /* ensure obd_setup and !obd_stopping */
 217 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 218 do {                                                            \
 219         OBD_CHECK_DEV(obd);                                     \
 220         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 221                 CERROR("Device %d not setup\n",                 \
 222                        (obd)->obd_minor);                       \
 223                 RETURN(-ENODEV);                                \
 224         }                                                       \
 225 } while (0)
 226
 227
 228 #ifdef LPROCFS
 229 #define OBD_COUNTER_OFFSET(op)                                  \
 230         ((offsetof(struct obd_ops, o_ ## op) -                  \
 231           offsetof(struct obd_ops, o_iocontrol))                \
 232          / sizeof(((struct obd_ops *)(0))->o_iocontrol))
 233
 234 #define OBD_COUNTER_INCREMENT(obdx, op)                           \
 235         if ((obdx)->obd_stats != NULL) {                          \
 236                 unsigned int coffset;                             \
 237                 coffset = (unsigned int)((obdx)->obd_cntr_base) + \
 238                         OBD_COUNTER_OFFSET(op);                   \
 239                 LASSERT(coffset < (obdx)->obd_stats->ls_num);     \
 240                 lprocfs_counter_incr((obdx)->obd_stats, coffset); \
 241         }
 242
 243 #define EXP_COUNTER_INCREMENT(export, op)                                    \
 244         if ((export)->exp_obd->obd_stats != NULL) {                          \
 245                 unsigned int coffset;                                        \
 246                 coffset = (unsigned int)((export)->exp_obd->obd_cntr_base) + \
 247                         OBD_COUNTER_OFFSET(op);                              \
 248                 LASSERT(coffset < (export)->exp_obd->obd_stats->ls_num);     \
 249                 lprocfs_counter_incr((export)->exp_obd->obd_stats, coffset); \
 250                 if ((export)->exp_ops_stats != NULL)                         \
 251                         lprocfs_counter_incr(                                \
 252                                 (export)->exp_ops_stats, coffset);           \
 253         }
 254
 255 #else
 256 #define OBD_COUNTER_OFFSET(op)
 257 #define OBD_COUNTER_INCREMENT(obd, op)
 258 #define EXP_COUNTER_INCREMENT(exp, op);
 259 #endif
 260
 261 #define OBD_CHECK_OP(obd, op, err)                              \
 262 do {                                                            \
 263         if (!OBT(obd) || !OBP((obd), op)) {\
 264                 if (err)                                        \
 265                         CERROR("obd_" #op ": dev %d no operation\n",    \
 266                                obd->obd_minor);                         \
 267                 RETURN(err);                                    \
 268         }                                                       \
 269 } while (0)
 270
 271 #define EXP_CHECK_OP(exp, op)                                   \
 272 do {                                                            \
 273         if ((exp) == NULL) {                                    \
 274                 CERROR("obd_" #op ": NULL export\n");           \
 275                 RETURN(-ENODEV);                                \
 276         }                                                       \
 277         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 278                 CERROR("obd_" #op ": cleaned up obd\n");        \
 279                 RETURN(-EOPNOTSUPP);                            \
 280         }                                                       \
 281         if (!OBT((exp)->exp_obd) || !OBP((exp)->exp_obd, op)) { \
 282                 CERROR("obd_" #op ": dev %d no operation\n",    \
 283                        (exp)->exp_obd->obd_minor);              \
 284                 RETURN(-EOPNOTSUPP);                            \
 285         }                                                       \
 286 } while (0)
 287
 288 #define CTXT_CHECK_OP(ctxt, op, err)                                         \
 289 do {                                                            \
 290         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {                     \
 291                 if (err)                                        \
 292                         CERROR("lop_" #op ": dev %d no operation\n",    \
 293                                ctxt->loc_obd->obd_minor);                         \
 294                 RETURN(err);                                    \
 295         }                                                       \
 296 } while (0)
 297
 298 static inline int class_devno_max(void)
 299 {
 300         return MAX_OBD_DEVICES;
 301 }
 302
 303 static inline int obd_get_info(struct obd_export *exp, __u32 keylen,
 304                                void *key, __u32 *vallen, void *val)
 305 {
 306         int rc;
 307         ENTRY;
 308
 309         EXP_CHECK_OP(exp, get_info);
 310         EXP_COUNTER_INCREMENT(exp, get_info);
 311
 312         rc = OBP(exp->exp_obd, get_info)(exp, keylen, key, vallen, val);
 313         RETURN(rc);
 314 }
 315
 316 static inline int obd_set_info_async(struct obd_export *exp, obd_count keylen,
 317                                      void *key, obd_count vallen, void *val,
 318                                      struct ptlrpc_request_set *set)
 319 {
 320         int rc;
 321         ENTRY;
 322
 323         EXP_CHECK_OP(exp, set_info_async);
 324         EXP_COUNTER_INCREMENT(exp, set_info_async);
 325
 326         rc = OBP(exp->exp_obd, set_info_async)(exp, keylen, key, vallen, val,
 327                                                set);
 328         RETURN(rc);
 329 }
 330
 331 static inline int obd_setup(struct obd_device *obd, int datalen, void *data)
 332 {
 333         int rc;
 334         ENTRY;
 335
 336         OBD_CHECK_OP(obd, setup, -EOPNOTSUPP);
 337         OBD_COUNTER_INCREMENT(obd, setup);
 338
 339         rc = OBP(obd, setup)(obd, datalen, data);
 340         RETURN(rc);
 341 }
 342
 343 static inline int obd_precleanup(struct obd_device *obd,
 344                                  enum obd_cleanup_stage cleanup_stage)
 345 {
 346         int rc;
 347         ENTRY;
 348
 349         OBD_CHECK_OP(obd, precleanup, 0);
 350         OBD_COUNTER_INCREMENT(obd, precleanup);
 351
 352         rc = OBP(obd, precleanup)(obd, cleanup_stage);
 353         RETURN(rc);
 354 }
 355
 356 static inline int obd_cleanup(struct obd_device *obd)
 357 {
 358         int rc;
 359         ENTRY;
 360
 361         OBD_CHECK_DEV(obd);
 362         OBD_CHECK_OP(obd, cleanup, 0);
 363         OBD_COUNTER_INCREMENT(obd, cleanup);
 364
 365         rc = OBP(obd, cleanup)(obd);
 366         RETURN(rc);
 367 }
 368
 369 static inline int
 370 obd_process_config(struct obd_device *obd, int datalen, void *data)
 371 {
 372         int rc;
 373         ENTRY;
 374
 375         OBD_CHECK_OP(obd, process_config, -EOPNOTSUPP);
 376         OBD_COUNTER_INCREMENT(obd, process_config);
 377
 378         rc = OBP(obd, process_config)(obd, datalen, data);
 379         RETURN(rc);
 380 }
 381
 382 /* Pack an in-memory MD struct for storage on disk.
 383  * Returns +ve size of packed MD (0 for free), or -ve error.
 384  *
 385  * If @disk_tgt == NULL, MD size is returned (max size if @mem_src == NULL).
 386  * If @*disk_tgt != NULL and @mem_src == NULL, @*disk_tgt will be freed.
 387  * If @*disk_tgt == NULL, it will be allocated
 388  */
 389 static inline int obd_packmd(struct obd_export *exp,
 390                              struct lov_mds_md **disk_tgt,
 391                              struct lov_stripe_md *mem_src)
 392 {
 393         int rc;
 394         ENTRY;
 395
 396         EXP_CHECK_OP(exp, packmd);
 397         EXP_COUNTER_INCREMENT(exp, packmd);
 398
 399         rc = OBP(exp->exp_obd, packmd)(exp, disk_tgt, mem_src);
 400         RETURN(rc);
 401 }
 402
 403 static inline int obd_size_diskmd(struct obd_export *exp,
 404                                   struct lov_stripe_md *mem_src)
 405 {
 406         return obd_packmd(exp, NULL, mem_src);
 407 }
 408
 409 /* helper functions */
 410 static inline int obd_alloc_diskmd(struct obd_export *exp,
 411                                    struct lov_mds_md **disk_tgt)
 412 {
 413         LASSERT(disk_tgt);
 414         LASSERT(*disk_tgt == NULL);
 415         return obd_packmd(exp, disk_tgt, NULL);
 416 }
 417
 418 static inline int obd_free_diskmd(struct obd_export *exp,
 419                                   struct lov_mds_md **disk_tgt)
 420 {
 421         LASSERT(disk_tgt);
 422         LASSERT(*disk_tgt);
 423         return obd_packmd(exp, disk_tgt, NULL);
 424 }
 425
 426 /* Unpack an MD struct from disk to in-memory format.
 427  * Returns +ve size of unpacked MD (0 for free), or -ve error.
 428  *
 429  * If @mem_tgt == NULL, MD size is returned (max size if @disk_src == NULL).
 430  * If @*mem_tgt != NULL and @disk_src == NULL, @*mem_tgt will be freed.
 431  * If @*mem_tgt == NULL, it will be allocated
 432  */
 433 static inline int obd_unpackmd(struct obd_export *exp,
 434                                struct lov_stripe_md **mem_tgt,
 435                                struct lov_mds_md *disk_src,
 436                                int disk_len)
 437 {
 438         int rc;
 439         ENTRY;
 440
 441         EXP_CHECK_OP(exp, unpackmd);
 442         EXP_COUNTER_INCREMENT(exp, unpackmd);
 443
 444         rc = OBP(exp->exp_obd, unpackmd)(exp, mem_tgt, disk_src, disk_len);
 445         RETURN(rc);
 446 }
 447
 448 /* helper functions */
 449 static inline int obd_alloc_memmd(struct obd_export *exp,
 450                                   struct lov_stripe_md **mem_tgt)
 451 {
 452         LASSERT(mem_tgt);
 453         LASSERT(*mem_tgt == NULL);
 454         return obd_unpackmd(exp, mem_tgt, NULL, 0);
 455 }
 456
 457 static inline int obd_free_memmd(struct obd_export *exp,
 458                                  struct lov_stripe_md **mem_tgt)
 459 {
 460         LASSERT(mem_tgt);
 461         LASSERT(*mem_tgt);
 462         return obd_unpackmd(exp, mem_tgt, NULL, 0);
 463 }
 464
 465 static inline int obd_checkmd(struct obd_export *exp,
 466                               struct obd_export *md_exp,
 467                               struct lov_stripe_md *mem_tgt)
 468 {
 469         int rc;
 470         ENTRY;
 471
 472         EXP_CHECK_OP(exp, checkmd);
 473         EXP_COUNTER_INCREMENT(exp, checkmd);
 474
 475         rc = OBP(exp->exp_obd, checkmd)(exp, md_exp, mem_tgt);
 476         RETURN(rc);
 477 }
 478
 479 static inline int obd_precreate(struct obd_export *exp, int need_create)
 480 {
 481         int rc;
 482         ENTRY;
 483
 484         EXP_CHECK_OP(exp, precreate);
 485         OBD_COUNTER_INCREMENT(exp->exp_obd, precreate);
 486
 487         rc = OBP(exp->exp_obd, precreate)(exp, need_create);
 488         RETURN(rc);
 489 }
 490
 491 static inline int obd_create(struct obd_export *exp, struct obdo *obdo,
 492                              struct lov_stripe_md **ea,
 493                              struct obd_trans_info *oti)
 494 {
 495         int rc;
 496         ENTRY;
 497
 498         EXP_CHECK_OP(exp, create);
 499         EXP_COUNTER_INCREMENT(exp, create);
 500
 501         rc = OBP(exp->exp_obd, create)(exp, obdo, ea, oti);
 502         RETURN(rc);
 503 }
 504
 505 static inline int obd_destroy(struct obd_export *exp, struct obdo *obdo,
 506                               struct lov_stripe_md *ea,
 507                               struct obd_trans_info *oti,
 508                               struct obd_export *md_exp)
 509 {
 510         int rc;
 511         ENTRY;
 512
 513         EXP_CHECK_OP(exp, destroy);
 514         EXP_COUNTER_INCREMENT(exp, destroy);
 515
 516         rc = OBP(exp->exp_obd, destroy)(exp, obdo, ea, oti, md_exp);
 517         RETURN(rc);
 518 }
 519
 520 static inline int obd_getattr(struct obd_export *exp, struct obd_info *oinfo)
 521 {
 522         int rc;
 523         ENTRY;
 524
 525         EXP_CHECK_OP(exp, getattr);
 526         EXP_COUNTER_INCREMENT(exp, getattr);
 527
 528         rc = OBP(exp->exp_obd, getattr)(exp, oinfo);
 529         RETURN(rc);
 530 }
 531
 532 static inline int obd_getattr_async(struct obd_export *exp,
 533                                     struct obd_info *oinfo,
 534                                     struct ptlrpc_request_set *set)
 535 {
 536         int rc;
 537         ENTRY;
 538
 539         EXP_CHECK_OP(exp, getattr_async);
 540         EXP_COUNTER_INCREMENT(exp, getattr_async);
 541
 542         rc = OBP(exp->exp_obd, getattr_async)(exp, oinfo, set);
 543         RETURN(rc);
 544 }
 545
 546 static inline int obd_setattr(struct obd_export *exp, struct obd_info *oinfo,
 547                               struct obd_trans_info *oti)
 548 {
 549         int rc;
 550         ENTRY;
 551
 552         EXP_CHECK_OP(exp, setattr);
 553         EXP_COUNTER_INCREMENT(exp, setattr);
 554
 555         rc = OBP(exp->exp_obd, setattr)(exp, oinfo, oti);
 556         RETURN(rc);
 557 }
 558
 559 /* This performs all the requests set init/wait/destroy actions. */
 560 static inline int obd_setattr_rqset(struct obd_export *exp,
 561                                     struct obd_info *oinfo,
 562                                     struct obd_trans_info *oti)
 563 {
 564         struct ptlrpc_request_set *set = NULL;
 565         int rc;
 566         ENTRY;
 567
 568         EXP_CHECK_OP(exp, setattr_async);
 569         EXP_COUNTER_INCREMENT(exp, setattr_async);
 570
 571         set =  ptlrpc_prep_set();
 572         if (set == NULL)
 573                 RETURN(-ENOMEM);
 574
 575         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 576         if (rc == 0)
 577                 rc = ptlrpc_set_wait(set);
 578         ptlrpc_set_destroy(set);
 579         RETURN(rc);
 580 }
 581
 582 /* This adds all the requests into @set if @set != NULL, otherwise
 583    all requests are sent asynchronously without waiting for response. */
 584 static inline int obd_setattr_async(struct obd_export *exp,
 585                                     struct obd_info *oinfo,
 586                                     struct obd_trans_info *oti,
 587                                     struct ptlrpc_request_set *set)
 588 {
 589         int rc;
 590         ENTRY;
 591
 592         EXP_CHECK_OP(exp, setattr_async);
 593         EXP_COUNTER_INCREMENT(exp, setattr_async);
 594
 595         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 596         RETURN(rc);
 597 }
 598
 599 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 600                                int priority)
 601 {
 602         struct obd_device *obd = imp->imp_obd;
 603         int rc;
 604         ENTRY;
 605
 606         OBD_CHECK_DEV_ACTIVE(obd);
 607         OBD_CHECK_OP(obd, add_conn, -EOPNOTSUPP);
 608         OBD_COUNTER_INCREMENT(obd, add_conn);
 609
 610         rc = OBP(obd, add_conn)(imp, uuid, priority);
 611         RETURN(rc);
 612 }
 613
 614 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 615 {
 616         struct obd_device *obd = imp->imp_obd;
 617         int rc;
 618         ENTRY;
 619
 620         OBD_CHECK_DEV_ACTIVE(obd);
 621         OBD_CHECK_OP(obd, del_conn, -EOPNOTSUPP);
 622         OBD_COUNTER_INCREMENT(obd, del_conn);
 623
 624         rc = OBP(obd, del_conn)(imp, uuid);
 625         RETURN(rc);
 626 }
 627
 628 static inline int obd_connect(struct lustre_handle *conn,struct obd_device *obd,
 629                               struct obd_uuid *cluuid,
 630                               struct obd_connect_data *d)
 631 {
 632         int rc;
 633         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition check */
 634         ENTRY;
 635
 636         OBD_CHECK_DEV_ACTIVE(obd);
 637         OBD_CHECK_OP(obd, connect, -EOPNOTSUPP);
 638         OBD_COUNTER_INCREMENT(obd, connect);
 639
 640         rc = OBP(obd, connect)(conn, obd, cluuid, d);
 641         /* check that only subset is granted */
 642         LASSERT(ergo(d != NULL,
 643                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 644         RETURN(rc);
 645 }
 646
 647 static inline int obd_reconnect(struct obd_export *exp,
 648                                 struct obd_device *obd,
 649                                 struct obd_uuid *cluuid,
 650                                 struct obd_connect_data *d)
 651 {
 652         int rc;
 653         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition check */
 654         ENTRY;
 655
 656         OBD_CHECK_DEV_ACTIVE(obd);
 657         OBD_CHECK_OP(obd, reconnect, 0);
 658         OBD_COUNTER_INCREMENT(obd, reconnect);
 659
 660         rc = OBP(obd, reconnect)(exp, obd, cluuid, d);
 661         /* check that only subset is granted */
 662         LASSERT(ergo(d != NULL,
 663                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 664         RETURN(rc);
 665 }
 666
 667 static inline int obd_disconnect(struct obd_export *exp)
 668 {
 669         int rc;
 670         ENTRY;
 671
 672         EXP_CHECK_OP(exp, disconnect);
 673         EXP_COUNTER_INCREMENT(exp, disconnect);
 674
 675         rc = OBP(exp->exp_obd, disconnect)(exp);
 676         RETURN(rc);
 677 }
 678
 679 static inline int obd_ping(struct obd_export *exp)
 680 {
 681         int rc;
 682         ENTRY;
 683
 684         OBD_CHECK_OP(exp->exp_obd, ping, 0);
 685         EXP_COUNTER_INCREMENT(exp, ping);
 686
 687         rc = OBP(exp->exp_obd, ping)(exp);
 688         RETURN(rc);
 689 }
 690
 691 static inline int obd_init_export(struct obd_export *exp)
 692 {
 693         int rc = 0;
 694
 695         ENTRY;
 696         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
 697             OBP((exp)->exp_obd, init_export))
 698                 rc = OBP(exp->exp_obd, init_export)(exp);
 699         RETURN(rc);
 700 }
 701
 702 static inline int obd_destroy_export(struct obd_export *exp)
 703 {
 704         ENTRY;
 705         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
 706             OBP((exp)->exp_obd, destroy_export))
 707                 OBP(exp->exp_obd, destroy_export)(exp);
 708         RETURN(0);
 709 }
 710
 711 static inline int obd_extent_calc(struct obd_export *exp,
 712                                   struct lov_stripe_md *md,
 713                                   int cmd, obd_off *offset)
 714 {
 715         int rc;
 716         ENTRY;
 717         EXP_CHECK_OP(exp, extent_calc);
 718         rc = OBP(exp->exp_obd, extent_calc)(exp, md, cmd, offset);
 719         RETURN(rc);
 720 }
 721
 722 static inline struct dentry *
 723 obd_lvfs_fid2dentry(struct obd_export *exp, __u64 id_ino, __u32 gen, __u64 gr)
 724 {
 725         LASSERT(exp->exp_obd);
 726
 727         return lvfs_fid2dentry(&exp->exp_obd->obd_lvfs_ctxt, id_ino, gen, gr,
 728                                exp->exp_obd);
 729 }
 730
 731 #ifndef time_before
 732 #define time_before(t1, t2) ((long)t2 - (long)t1 > 0)
 733 #endif
 734
 735 /* @max_age is the oldest time in jiffies that we accept using a cached data.
 736  * If the cache is older than @max_age we will get a new value from the
 737  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
 738 static inline int obd_statfs_async(struct obd_device *obd,
 739                                    struct obd_info *oinfo,
 740                                    __u64 max_age,
 741                                    struct ptlrpc_request_set *rqset)
 742 {
 743         int rc = 0;
 744         ENTRY;
 745
 746         if (obd == NULL)
 747                 RETURN(-EINVAL);
 748
 749         OBD_CHECK_OP(obd, statfs, -EOPNOTSUPP);
 750         OBD_COUNTER_INCREMENT(obd, statfs);
 751
 752         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
 753                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
 754         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
 755                 rc = OBP(obd, statfs_async)(obd, oinfo, max_age, rqset);
 756         } else {
 757                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
 758                        " objects "LPU64"/"LPU64"\n",
 759                        obd->obd_name, &obd->obd_osfs,
 760                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
 761                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
 762                 spin_lock(&obd->obd_osfs_lock);
 763                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
 764                 spin_unlock(&obd->obd_osfs_lock);
 765                 if (oinfo->oi_cb_up)
 766                         oinfo->oi_cb_up(oinfo, 0);
 767         }
 768         RETURN(rc);
 769 }
 770
 771 static inline int obd_statfs_rqset(struct obd_device *obd,
 772                                    struct obd_statfs *osfs, __u64 max_age)
 773 {
 774         struct ptlrpc_request_set *set = NULL;
 775         struct obd_info oinfo = { { { 0 } } };
 776         int rc = 0;
 777         ENTRY;
 778
 779         set = ptlrpc_prep_set();
 780         if (set == NULL)
 781                 RETURN(-ENOMEM);
 782
 783         oinfo.oi_osfs = osfs;
 784         rc = obd_statfs_async(obd, &oinfo, max_age, set);
 785         if (rc == 0)
 786                 rc = ptlrpc_set_wait(set);
 787         ptlrpc_set_destroy(set);
 788         RETURN(rc);
 789 }
 790
 791 /* @max_age is the oldest time in jiffies that we accept using a cached data.
 792  * If the cache is older than @max_age we will get a new value from the
 793  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
 794 static inline int obd_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 795                              __u64 max_age)
 796 {
 797         int rc = 0;
 798         ENTRY;
 799
 800         if (obd == NULL)
 801                 RETURN(-EINVAL);
 802
 803         OBD_CHECK_OP(obd, statfs, -EOPNOTSUPP);
 804         OBD_COUNTER_INCREMENT(obd, statfs);
 805
 806         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
 807                obd->obd_osfs_age, max_age);
 808         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
 809                 rc = OBP(obd, statfs)(obd, osfs, max_age);
 810                 if (rc == 0) {
 811                         spin_lock(&obd->obd_osfs_lock);
 812                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
 813                         obd->obd_osfs_age = cfs_time_current_64();
 814                         spin_unlock(&obd->obd_osfs_lock);
 815                 }
 816         } else {
 817                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
 818                        " objects "LPU64"/"LPU64"\n",
 819                        obd->obd_name, &obd->obd_osfs,
 820                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
 821                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
 822                 spin_lock(&obd->obd_osfs_lock);
 823                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
 824                 spin_unlock(&obd->obd_osfs_lock);
 825         }
 826         RETURN(rc);
 827 }
 828
 829 static inline int obd_sync(struct obd_export *exp, struct obdo *oa,
 830                            struct lov_stripe_md *ea, obd_size start,
 831                            obd_size end)
 832 {
 833         int rc;
 834         ENTRY;
 835
 836         OBD_CHECK_OP(exp->exp_obd, sync, -EOPNOTSUPP);
 837         EXP_COUNTER_INCREMENT(exp, sync);
 838
 839         rc = OBP(exp->exp_obd, sync)(exp, oa, ea, start, end);
 840         RETURN(rc);
 841 }
 842
 843 static inline int obd_punch_rqset(struct obd_export *exp,
 844                                   struct obd_info *oinfo,
 845                                   struct obd_trans_info *oti)
 846 {
 847         struct ptlrpc_request_set *set = NULL;
 848         int rc;
 849         ENTRY;
 850
 851         EXP_CHECK_OP(exp, punch);
 852         EXP_COUNTER_INCREMENT(exp, punch);
 853
 854         set =  ptlrpc_prep_set();
 855         if (set == NULL)
 856                 RETURN(-ENOMEM);
 857
 858         rc = OBP(exp->exp_obd, punch)(exp, oinfo, oti, set);
 859         if (rc == 0)
 860                 rc = ptlrpc_set_wait(set);
 861         ptlrpc_set_destroy(set);
 862         RETURN(rc);
 863 }
 864
 865 static inline int obd_punch(struct obd_export *exp, struct obd_info *oinfo,
 866                             struct obd_trans_info *oti,
 867                             struct ptlrpc_request_set *rqset)
 868 {
 869         int rc;
 870         ENTRY;
 871
 872         EXP_CHECK_OP(exp, punch);
 873         EXP_COUNTER_INCREMENT(exp, punch);
 874
 875         rc = OBP(exp->exp_obd, punch)(exp, oinfo, oti, rqset);
 876         RETURN(rc);
 877 }
 878
 879 static inline int obd_brw(int cmd, struct obd_export *exp,
 880                           struct obd_info *oinfo, obd_count oa_bufs,
 881                           struct brw_page *pg, struct obd_trans_info *oti)
 882 {
 883         int rc;
 884         ENTRY;
 885
 886         EXP_CHECK_OP(exp, brw);
 887         EXP_COUNTER_INCREMENT(exp, brw);
 888
 889         if (!(cmd & (OBD_BRW_RWMASK | OBD_BRW_CHECK))) {
 890                 CERROR("obd_brw: cmd must be OBD_BRW_READ, OBD_BRW_WRITE, "
 891                        "or OBD_BRW_CHECK\n");
 892                 LBUG();
 893         }
 894
 895         rc = OBP(exp->exp_obd, brw)(cmd, exp, oinfo, oa_bufs, pg, oti);
 896         RETURN(rc);
 897 }
 898
 899 static inline int obd_brw_async(int cmd, struct obd_export *exp,
 900                                 struct obd_info *oinfo, obd_count oa_bufs,
 901                                 struct brw_page *pg, struct obd_trans_info *oti,
 902                                 struct ptlrpc_request_set *set)
 903 {
 904         int rc;
 905         ENTRY;
 906
 907         EXP_CHECK_OP(exp, brw_async);
 908         EXP_COUNTER_INCREMENT(exp, brw_async);
 909
 910         if (!(cmd & OBD_BRW_RWMASK)) {
 911                 CERROR("obd_brw: cmd must be OBD_BRW_READ or OBD_BRW_WRITE\n");
 912                 LBUG();
 913         }
 914
 915         rc = OBP(exp->exp_obd, brw_async)(cmd, exp, oinfo, oa_bufs, pg,oti,set);
 916         RETURN(rc);
 917 }
 918
 919 static inline int obd_brw_rqset(int cmd, struct obd_export *exp,
 920                                 struct obdo *oa, struct lov_stripe_md *lsm,
 921                                 obd_count oa_bufs, struct brw_page *pg,
 922                                 struct obd_trans_info *oti)
 923 {
 924         struct ptlrpc_request_set *set = NULL;
 925         struct obd_info oinfo = { { { 0 } } };
 926         int rc = 0;
 927         ENTRY;
 928
 929         set =  ptlrpc_prep_set();
 930         if (set == NULL)
 931                 RETURN(-ENOMEM);
 932
 933         oinfo.oi_oa = oa;
 934         oinfo.oi_md = lsm;
 935         rc = obd_brw_async(cmd, exp, &oinfo, oa_bufs, pg, oti, set);
 936         if (rc == 0) {
 937                 rc = ptlrpc_set_wait(set);
 938                 if (rc)
 939                         CERROR("error from callback: rc = %d\n", rc);
 940         } else {
 941                 CDEBUG(rc == -ENOSPC ? D_INODE : D_ERROR,
 942                        "error from obd_brw_async: rc = %d\n", rc);
 943         }
 944         ptlrpc_set_destroy(set);
 945         RETURN(rc);
 946 }
 947
 948 static inline  int obd_prep_async_page(struct obd_export *exp,
 949                                        struct lov_stripe_md *lsm,
 950                                        struct lov_oinfo *loi,
 951                                        cfs_page_t *page, obd_off offset,
 952                                        struct obd_async_page_ops *ops,
 953                                        void *data, void **res)
 954 {
 955         int ret;
 956         ENTRY;
 957
 958         OBD_CHECK_OP(exp->exp_obd, prep_async_page, -EOPNOTSUPP);
 959         EXP_COUNTER_INCREMENT(exp, prep_async_page);
 960
 961         ret = OBP(exp->exp_obd, prep_async_page)(exp, lsm, loi, page, offset,
 962                                                  ops, data, res);
 963         RETURN(ret);
 964 }
 965
 966 static inline int obd_queue_async_io(struct obd_export *exp,
 967                                      struct lov_stripe_md *lsm,
 968                                      struct lov_oinfo *loi, void *cookie,
 969                                      int cmd, obd_off off, int count,
 970                                      obd_flag brw_flags, obd_flag async_flags)
 971 {
 972         int rc;
 973         ENTRY;
 974
 975         OBD_CHECK_OP(exp->exp_obd, queue_async_io, -EOPNOTSUPP);
 976         EXP_COUNTER_INCREMENT(exp, queue_async_io);
 977         LASSERT(cmd & OBD_BRW_RWMASK);
 978
 979         rc = OBP(exp->exp_obd, queue_async_io)(exp, lsm, loi, cookie, cmd, off,
 980                                                count, brw_flags, async_flags);
 981         RETURN(rc);
 982 }
 983
 984 static inline int obd_set_async_flags(struct obd_export *exp,
 985                                       struct lov_stripe_md *lsm,
 986                                       struct lov_oinfo *loi, void *cookie,
 987                                       obd_flag async_flags)
 988 {
 989         int rc;
 990         ENTRY;
 991
 992         OBD_CHECK_OP(exp->exp_obd, set_async_flags, -EOPNOTSUPP);
 993         EXP_COUNTER_INCREMENT(exp, set_async_flags);
 994
 995         rc = OBP(exp->exp_obd, set_async_flags)(exp, lsm, loi, cookie,
 996                                                 async_flags);
 997         RETURN(rc);
 998 }
 999
1000 static inline int obd_queue_group_io(struct obd_export *exp,
1001                                      struct lov_stripe_md *lsm,
1002                                      struct lov_oinfo *loi,
1003                                      struct obd_io_group *oig,
1004                                      void *cookie, int cmd, obd_off off,
1005                                      int count, obd_flag brw_flags,
1006                                      obd_flag async_flags)
1007 {
1008         int rc;
1009         ENTRY;
1010
1011         OBD_CHECK_OP(exp->exp_obd, queue_group_io, -EOPNOTSUPP);
1012         EXP_COUNTER_INCREMENT(exp, queue_group_io);
1013         LASSERT(cmd & OBD_BRW_RWMASK);
1014
1015         rc = OBP(exp->exp_obd, queue_group_io)(exp, lsm, loi, oig, cookie,
1016                                                cmd, off, count, brw_flags,
1017                                                async_flags);
1018         RETURN(rc);
1019 }
1020
1021 static inline int obd_trigger_group_io(struct obd_export *exp,
1022                                        struct lov_stripe_md *lsm,
1023                                        struct lov_oinfo *loi,
1024                                        struct obd_io_group *oig)
1025 {
1026         int rc;
1027         ENTRY;
1028
1029         OBD_CHECK_OP(exp->exp_obd, trigger_group_io, -EOPNOTSUPP);
1030         EXP_COUNTER_INCREMENT(exp, trigger_group_io);
1031
1032         rc = OBP(exp->exp_obd, trigger_group_io)(exp, lsm, loi, oig);
1033         RETURN(rc);
1034 }
1035
1036 static inline int obd_teardown_async_page(struct obd_export *exp,
1037                                           struct lov_stripe_md *lsm,
1038                                           struct lov_oinfo *loi, void *cookie)
1039 {
1040         int rc;
1041         ENTRY;
1042
1043         OBD_CHECK_OP(exp->exp_obd, teardown_async_page, -EOPNOTSUPP);
1044         EXP_COUNTER_INCREMENT(exp, teardown_async_page);
1045
1046         rc = OBP(exp->exp_obd, teardown_async_page)(exp, lsm, loi, cookie);
1047         RETURN(rc);
1048 }
1049
1050 static inline int obd_preprw(int cmd, struct obd_export *exp, struct obdo *oa,
1051                              int objcount, struct obd_ioobj *obj,
1052                              int niocount, struct niobuf_remote *remote,
1053                              struct niobuf_local *local,
1054                              struct obd_trans_info *oti)
1055 {
1056         int rc;
1057         ENTRY;
1058
1059         OBD_CHECK_OP(exp->exp_obd, preprw, -EOPNOTSUPP);
1060         EXP_COUNTER_INCREMENT(exp, preprw);
1061
1062         rc = OBP(exp->exp_obd, preprw)(cmd, exp, oa, objcount, obj, niocount,
1063                                        remote, local, oti);
1064         RETURN(rc);
1065 }
1066
1067 static inline int obd_commitrw(int cmd, struct obd_export *exp, struct obdo *oa,
1068                                int objcount, struct obd_ioobj *obj,
1069                                int niocount, struct niobuf_local *local,
1070                                struct obd_trans_info *oti, int rc)
1071 {
1072         ENTRY;
1073
1074         OBD_CHECK_OP(exp->exp_obd, commitrw, -EOPNOTSUPP);
1075         EXP_COUNTER_INCREMENT(exp, commitrw);
1076
1077         rc = OBP(exp->exp_obd, commitrw)(cmd, exp, oa, objcount, obj, niocount,
1078                                          local, oti, rc);
1079         RETURN(rc);
1080 }
1081
1082 static inline int obd_merge_lvb(struct obd_export *exp,
1083                                 struct lov_stripe_md *lsm,
1084                                 struct ost_lvb *lvb, int kms_only)
1085 {
1086         int rc;
1087         ENTRY;
1088
1089         OBD_CHECK_OP(exp->exp_obd, merge_lvb, -EOPNOTSUPP);
1090         EXP_COUNTER_INCREMENT(exp, merge_lvb);
1091
1092         rc = OBP(exp->exp_obd, merge_lvb)(exp, lsm, lvb, kms_only);
1093         RETURN(rc);
1094 }
1095
1096 static inline int obd_adjust_kms(struct obd_export *exp,
1097                                  struct lov_stripe_md *lsm, obd_off size,
1098                                  int shrink)
1099 {
1100         int rc;
1101         ENTRY;
1102
1103         OBD_CHECK_OP(exp->exp_obd, adjust_kms, -EOPNOTSUPP);
1104         EXP_COUNTER_INCREMENT(exp, adjust_kms);
1105
1106         rc = OBP(exp->exp_obd, adjust_kms)(exp, lsm, size, shrink);
1107         RETURN(rc);
1108 }
1109
1110 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1111                                 int len, void *karg, void *uarg)
1112 {
1113         int rc;
1114         ENTRY;
1115
1116         EXP_CHECK_OP(exp, iocontrol);
1117         EXP_COUNTER_INCREMENT(exp, iocontrol);
1118
1119         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1120         RETURN(rc);
1121 }
1122
1123 static inline int obd_enqueue_rqset(struct obd_export *exp,
1124                                     struct obd_info *oinfo,
1125                                     struct ldlm_enqueue_info *einfo)
1126 {
1127         struct ptlrpc_request_set *set = NULL;
1128         int rc;
1129         ENTRY;
1130
1131         EXP_CHECK_OP(exp, enqueue);
1132         EXP_COUNTER_INCREMENT(exp, enqueue);
1133
1134         set =  ptlrpc_prep_set();
1135         if (set == NULL)
1136                 RETURN(-ENOMEM);
1137
1138         rc = OBP(exp->exp_obd, enqueue)(exp, oinfo, einfo, set);
1139         if (rc == 0)
1140                 rc = ptlrpc_set_wait(set);
1141         ptlrpc_set_destroy(set);
1142         RETURN(rc);
1143 }
1144
1145 static inline int obd_enqueue(struct obd_export *exp,
1146                               struct obd_info *oinfo,
1147                               struct ldlm_enqueue_info *einfo,
1148                               struct ptlrpc_request_set *set)
1149 {
1150         int rc;
1151         ENTRY;
1152
1153         EXP_CHECK_OP(exp, enqueue);
1154         EXP_COUNTER_INCREMENT(exp, enqueue);
1155
1156         rc = OBP(exp->exp_obd, enqueue)(exp, oinfo, einfo, set);
1157         RETURN(rc);
1158 }
1159
1160 static inline int obd_match(struct obd_export *exp, struct lov_stripe_md *ea,
1161                             __u32 type, ldlm_policy_data_t *policy, __u32 mode,
1162                             int *flags, void *data, struct lustre_handle *lockh)
1163 {
1164         int rc;
1165         ENTRY;
1166
1167         EXP_CHECK_OP(exp, match);
1168         EXP_COUNTER_INCREMENT(exp, match);
1169
1170         rc = OBP(exp->exp_obd, match)(exp, ea, type, policy, mode, flags, data,
1171                                       lockh);
1172         RETURN(rc);
1173 }
1174
1175 static inline int obd_change_cbdata(struct obd_export *exp,
1176                                     struct lov_stripe_md *lsm,
1177                                     ldlm_iterator_t it, void *data)
1178 {
1179         int rc;
1180         ENTRY;
1181
1182         EXP_CHECK_OP(exp, change_cbdata);
1183         EXP_COUNTER_INCREMENT(exp, change_cbdata);
1184
1185         rc = OBP(exp->exp_obd, change_cbdata)(exp, lsm, it, data);
1186         RETURN(rc);
1187 }
1188
1189 static inline int obd_cancel(struct obd_export *exp,
1190                              struct lov_stripe_md *ea, __u32 mode,
1191                              struct lustre_handle *lockh)
1192 {
1193         int rc;
1194         ENTRY;
1195
1196         EXP_CHECK_OP(exp, cancel);
1197         EXP_COUNTER_INCREMENT(exp, cancel);
1198
1199         rc = OBP(exp->exp_obd, cancel)(exp, ea, mode, lockh);
1200         RETURN(rc);
1201 }
1202
1203 static inline int obd_cancel_unused(struct obd_export *exp,
1204                                     struct lov_stripe_md *ea, int flags,
1205                                     void *opaque)
1206 {
1207         int rc;
1208         ENTRY;
1209
1210         EXP_CHECK_OP(exp, cancel_unused);
1211         EXP_COUNTER_INCREMENT(exp, cancel_unused);
1212
1213         rc = OBP(exp->exp_obd, cancel_unused)(exp, ea, flags, opaque);
1214         RETURN(rc);
1215 }
1216
1217 static inline int obd_join_lru(struct obd_export *exp,
1218                                struct lov_stripe_md *ea, int join)
1219 {
1220         int rc;
1221         ENTRY;
1222
1223         EXP_CHECK_OP(exp, join_lru);
1224         EXP_COUNTER_INCREMENT(exp, join_lru);
1225
1226         rc = OBP(exp->exp_obd, join_lru)(exp, ea, join);
1227         RETURN(rc);
1228 }
1229
1230 static inline int obd_pin(struct obd_export *exp, obd_id ino, __u32 gen,
1231                           int type, struct obd_client_handle *handle, int flag)
1232 {
1233         int rc;
1234         ENTRY;
1235
1236         EXP_CHECK_OP(exp, pin);
1237         EXP_COUNTER_INCREMENT(exp, pin);
1238
1239         rc = OBP(exp->exp_obd, pin)(exp, ino, gen, type, handle, flag);
1240         RETURN(rc);
1241 }
1242
1243 static inline int obd_unpin(struct obd_export *exp,
1244                             struct obd_client_handle *handle, int flag)
1245 {
1246         int rc;
1247         ENTRY;
1248
1249         EXP_CHECK_OP(exp, unpin);
1250         EXP_COUNTER_INCREMENT(exp, unpin);
1251
1252         rc = OBP(exp->exp_obd, unpin)(exp, handle, flag);
1253         RETURN(rc);
1254 }
1255
1256
1257 static inline void obd_import_event(struct obd_device *obd,
1258                                     struct obd_import *imp,
1259                                     enum obd_import_event event)
1260 {
1261         ENTRY;
1262         if (!obd) {
1263                 CERROR("NULL device\n");
1264                 EXIT;
1265                 return;
1266         }
1267         if (obd->obd_set_up && OBP(obd, import_event)) {
1268                 OBD_COUNTER_INCREMENT(obd, import_event);
1269                 OBP(obd, import_event)(obd, imp, event);
1270         }
1271         EXIT;
1272 }
1273
1274 static inline int obd_notify(struct obd_device *obd,
1275                              struct obd_device *watched,
1276                              enum obd_notify_event ev, void *data)
1277 {
1278         ENTRY;
1279         OBD_CHECK_DEV(obd);
1280
1281         /* the check for async_recov is a complete hack - I'm hereby
1282            overloading the meaning to also mean "this was called from
1283            mds_postsetup".  I know that my mds is able to handle notifies
1284            by this point, and it needs to get them to execute mds_postrecov. */
1285         if (!obd->obd_set_up && !obd->obd_async_recov) {
1286                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1287                 RETURN(-EINVAL);
1288         }
1289
1290         if (!OBP(obd, notify))
1291                 RETURN(-ENOSYS);
1292
1293         OBD_COUNTER_INCREMENT(obd, notify);
1294         RETURN(OBP(obd, notify)(obd, watched, ev, data));
1295 }
1296
1297 static inline int obd_notify_observer(struct obd_device *observer,
1298                                       struct obd_device *observed,
1299                                       enum obd_notify_event ev, void *data)
1300 {
1301         int rc1;
1302         int rc2;
1303
1304         struct obd_notify_upcall *onu;
1305
1306         if (observer->obd_observer)
1307                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1308         else
1309                 rc1 = 0;
1310         /*
1311          * Also, call non-obd listener, if any
1312          */
1313         onu = &observer->obd_upcall;
1314         if (onu->onu_upcall != NULL)
1315                 rc2 = onu->onu_upcall(observer, observed, ev, onu->onu_owner);
1316         else
1317                 rc2 = 0;
1318
1319         return rc1 ?: rc2;
1320  }
1321
1322 static inline int obd_quotacheck(struct obd_export *exp,
1323                                  struct obd_quotactl *oqctl)
1324 {
1325         int rc;
1326         ENTRY;
1327
1328         EXP_CHECK_OP(exp, quotacheck);
1329         EXP_COUNTER_INCREMENT(exp, quotacheck);
1330
1331         rc = OBP(exp->exp_obd, quotacheck)(exp, oqctl);
1332         RETURN(rc);
1333 }
1334
1335 static inline int obd_quotactl(struct obd_export *exp,
1336                                struct obd_quotactl *oqctl)
1337 {
1338         int rc;
1339         ENTRY;
1340
1341         EXP_CHECK_OP(exp, quotactl);
1342         EXP_COUNTER_INCREMENT(exp, quotactl);
1343
1344         rc = OBP(exp->exp_obd, quotactl)(exp, oqctl);
1345         RETURN(rc);
1346 }
1347
1348 static inline int obd_health_check(struct obd_device *obd)
1349 {
1350         /* returns: 0 on healthy
1351          *         >0 on unhealthy + reason code/flag
1352          *            however the only suppored reason == 1 right now
1353          *            We'll need to define some better reasons
1354          *            or flags in the future.
1355          *         <0 on error
1356          */
1357         int rc;
1358         ENTRY;
1359
1360         /* don't use EXP_CHECK_OP, because NULL method is normal here */
1361         if (obd == NULL || !OBT(obd)) {
1362                 CERROR("cleaned up obd\n");
1363                 RETURN(-EOPNOTSUPP);
1364         }
1365         if (!obd->obd_set_up || obd->obd_stopping)
1366                 RETURN(0);
1367         if (!OBP(obd, health_check))
1368                 RETURN(0);
1369
1370         rc = OBP(obd, health_check)(obd);
1371         RETURN(rc);
1372 }
1373
1374 static inline int obd_register_observer(struct obd_device *obd,
1375                                         struct obd_device *observer)
1376 {
1377         ENTRY;
1378         OBD_CHECK_DEV(obd);
1379         if (obd->obd_observer && observer)
1380                 RETURN(-EALREADY);
1381         obd->obd_observer = observer;
1382         RETURN(0);
1383 }
1384
1385 /* OBD Metadata Support */
1386
1387 extern int obd_init_caches(void);
1388 extern void obd_cleanup_caches(void);
1389
1390 /* support routines */
1391 extern cfs_mem_cache_t *obdo_cachep;
1392
1393 #define OBDO_ALLOC(ptr)                                                       \
1394 do {                                                                          \
1395         OBD_SLAB_ALLOC_PTR((ptr), obdo_cachep);                               \
1396 } while(0)
1397
1398 #define OBDO_FREE(ptr)                                                        \
1399 do {                                                                          \
1400         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1401 } while(0)
1402
1403 /* I'm as embarrassed about this as you are.
1404  *
1405  * <shaver> // XXX do not look into _superhack with remaining eye
1406  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1407 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1408
1409 /* sysctl.c */
1410 extern void obd_sysctl_init (void);
1411 extern void obd_sysctl_clean (void);
1412
1413 /* uuid.c  */
1414 typedef __u8 class_uuid_t[16];
1415 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
1416
1417 /* lustre_peer.c    */
1418 int lustre_uuid_to_peer(char *uuid, lnet_nid_t *peer_nid, int index);
1419 int class_add_uuid(char *uuid, __u64 nid);
1420 int class_del_uuid (char *uuid);
1421 void class_init_uuidlist(void);
1422 void class_exit_uuidlist(void);
1423
1424 /* prng.c */
1425 void ll_generate_random_uuid(class_uuid_t uuid_out);
1426
1427 #endif /* __LINUX_OBD_CLASS_H */