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_nid_stats != NULL &&                       \
 251                     (export)->exp_nid_stats->nid_stats != NULL)              \
 252                         lprocfs_counter_incr(                                \
 253                                 (export)->exp_nid_stats->nid_stats, coffset);\
 254         }
 255
 256 #else
 257 #define OBD_COUNTER_OFFSET(op)
 258 #define OBD_COUNTER_INCREMENT(obd, op)
 259 #define EXP_COUNTER_INCREMENT(exp, op);
 260 #endif
 261
 262 #define OBD_CHECK_OP(obd, op, err)                              \
 263 do {                                                            \
 264         if (!OBT(obd) || !OBP((obd), op)) {\
 265                 if (err)                                        \
 266                         CERROR("obd_" #op ": dev %d no operation\n",    \
 267                                obd->obd_minor);                         \
 268                 RETURN(err);                                    \
 269         }                                                       \
 270 } while (0)
 271
 272 #define EXP_CHECK_OP(exp, op)                                   \
 273 do {                                                            \
 274         if ((exp) == NULL) {                                    \
 275                 CERROR("obd_" #op ": NULL export\n");           \
 276                 RETURN(-ENODEV);                                \
 277         }                                                       \
 278         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 279                 CERROR("obd_" #op ": cleaned up obd\n");        \
 280                 RETURN(-EOPNOTSUPP);                            \
 281         }                                                       \
 282         if (!OBT((exp)->exp_obd) || !OBP((exp)->exp_obd, op)) { \
 283                 CERROR("obd_" #op ": dev %d no operation\n",    \
 284                        (exp)->exp_obd->obd_minor);              \
 285                 RETURN(-EOPNOTSUPP);                            \
 286         }                                                       \
 287 } while (0)
 288
 289 #define CTXT_CHECK_OP(ctxt, op, err)                                         \
 290 do {                                                            \
 291         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {                     \
 292                 if (err)                                        \
 293                         CERROR("lop_" #op ": dev %d no operation\n",    \
 294                                ctxt->loc_obd->obd_minor);                         \
 295                 RETURN(err);                                    \
 296         }                                                       \
 297 } while (0)
 298
 299 static inline int class_devno_max(void)
 300 {
 301         return MAX_OBD_DEVICES;
 302 }
 303
 304 static inline int obd_get_info(struct obd_export *exp, __u32 keylen,
 305                                void *key, __u32 *vallen, void *val)
 306 {
 307         int rc;
 308         ENTRY;
 309
 310         EXP_CHECK_OP(exp, get_info);
 311         EXP_COUNTER_INCREMENT(exp, get_info);
 312
 313         rc = OBP(exp->exp_obd, get_info)(exp, keylen, key, vallen, val);
 314         RETURN(rc);
 315 }
 316
 317 static inline int obd_set_info_async(struct obd_export *exp, obd_count keylen,
 318                                      void *key, obd_count vallen, void *val,
 319                                      struct ptlrpc_request_set *set)
 320 {
 321         int rc;
 322         ENTRY;
 323
 324         EXP_CHECK_OP(exp, set_info_async);
 325         EXP_COUNTER_INCREMENT(exp, set_info_async);
 326
 327         rc = OBP(exp->exp_obd, set_info_async)(exp, keylen, key, vallen, val,
 328                                                set);
 329         RETURN(rc);
 330 }
 331
 332 static inline int obd_setup(struct obd_device *obd, int datalen, void *data)
 333 {
 334         int rc;
 335         ENTRY;
 336
 337         OBD_CHECK_OP(obd, setup, -EOPNOTSUPP);
 338         OBD_COUNTER_INCREMENT(obd, setup);
 339
 340         rc = OBP(obd, setup)(obd, datalen, data);
 341         RETURN(rc);
 342 }
 343
 344 static inline int obd_precleanup(struct obd_device *obd,
 345                                  enum obd_cleanup_stage cleanup_stage)
 346 {
 347         int rc;
 348         ENTRY;
 349
 350         OBD_CHECK_OP(obd, precleanup, 0);
 351         OBD_COUNTER_INCREMENT(obd, precleanup);
 352
 353         rc = OBP(obd, precleanup)(obd, cleanup_stage);
 354         RETURN(rc);
 355 }
 356
 357 static inline int obd_cleanup(struct obd_device *obd)
 358 {
 359         int rc;
 360         ENTRY;
 361
 362         OBD_CHECK_DEV(obd);
 363         OBD_CHECK_OP(obd, cleanup, 0);
 364         OBD_COUNTER_INCREMENT(obd, cleanup);
 365
 366         rc = OBP(obd, cleanup)(obd);
 367         RETURN(rc);
 368 }
 369
 370 static inline int
 371 obd_process_config(struct obd_device *obd, int datalen, void *data)
 372 {
 373         int rc;
 374         ENTRY;
 375
 376         OBD_CHECK_OP(obd, process_config, -EOPNOTSUPP);
 377         OBD_COUNTER_INCREMENT(obd, process_config);
 378
 379         rc = OBP(obd, process_config)(obd, datalen, data);
 380         RETURN(rc);
 381 }
 382
 383 /* Pack an in-memory MD struct for storage on disk.
 384  * Returns +ve size of packed MD (0 for free), or -ve error.
 385  *
 386  * If @disk_tgt == NULL, MD size is returned (max size if @mem_src == NULL).
 387  * If @*disk_tgt != NULL and @mem_src == NULL, @*disk_tgt will be freed.
 388  * If @*disk_tgt == NULL, it will be allocated
 389  */
 390 static inline int obd_packmd(struct obd_export *exp,
 391                              struct lov_mds_md **disk_tgt,
 392                              struct lov_stripe_md *mem_src)
 393 {
 394         int rc;
 395         ENTRY;
 396
 397         EXP_CHECK_OP(exp, packmd);
 398         EXP_COUNTER_INCREMENT(exp, packmd);
 399
 400         rc = OBP(exp->exp_obd, packmd)(exp, disk_tgt, mem_src);
 401         RETURN(rc);
 402 }
 403
 404 static inline int obd_size_diskmd(struct obd_export *exp,
 405                                   struct lov_stripe_md *mem_src)
 406 {
 407         return obd_packmd(exp, NULL, mem_src);
 408 }
 409
 410 /* helper functions */
 411 static inline int obd_alloc_diskmd(struct obd_export *exp,
 412                                    struct lov_mds_md **disk_tgt)
 413 {
 414         LASSERT(disk_tgt);
 415         LASSERT(*disk_tgt == NULL);
 416         return obd_packmd(exp, disk_tgt, NULL);
 417 }
 418
 419 static inline int obd_free_diskmd(struct obd_export *exp,
 420                                   struct lov_mds_md **disk_tgt)
 421 {
 422         LASSERT(disk_tgt);
 423         LASSERT(*disk_tgt);
 424         return obd_packmd(exp, disk_tgt, NULL);
 425 }
 426
 427 /* Unpack an MD struct from disk to in-memory format.
 428  * Returns +ve size of unpacked MD (0 for free), or -ve error.
 429  *
 430  * If @mem_tgt == NULL, MD size is returned (max size if @disk_src == NULL).
 431  * If @*mem_tgt != NULL and @disk_src == NULL, @*mem_tgt will be freed.
 432  * If @*mem_tgt == NULL, it will be allocated
 433  */
 434 static inline int obd_unpackmd(struct obd_export *exp,
 435                                struct lov_stripe_md **mem_tgt,
 436                                struct lov_mds_md *disk_src,
 437                                int disk_len)
 438 {
 439         int rc;
 440         ENTRY;
 441
 442         EXP_CHECK_OP(exp, unpackmd);
 443         EXP_COUNTER_INCREMENT(exp, unpackmd);
 444
 445         rc = OBP(exp->exp_obd, unpackmd)(exp, mem_tgt, disk_src, disk_len);
 446         RETURN(rc);
 447 }
 448
 449 /* helper functions */
 450 static inline int obd_alloc_memmd(struct obd_export *exp,
 451                                   struct lov_stripe_md **mem_tgt)
 452 {
 453         LASSERT(mem_tgt);
 454         LASSERT(*mem_tgt == NULL);
 455         return obd_unpackmd(exp, mem_tgt, NULL, 0);
 456 }
 457
 458 static inline int obd_free_memmd(struct obd_export *exp,
 459                                  struct lov_stripe_md **mem_tgt)
 460 {
 461         LASSERT(mem_tgt);
 462         LASSERT(*mem_tgt);
 463         return obd_unpackmd(exp, mem_tgt, NULL, 0);
 464 }
 465
 466 static inline int obd_checkmd(struct obd_export *exp,
 467                               struct obd_export *md_exp,
 468                               struct lov_stripe_md *mem_tgt)
 469 {
 470         int rc;
 471         ENTRY;
 472
 473         EXP_CHECK_OP(exp, checkmd);
 474         EXP_COUNTER_INCREMENT(exp, checkmd);
 475
 476         rc = OBP(exp->exp_obd, checkmd)(exp, md_exp, mem_tgt);
 477         RETURN(rc);
 478 }
 479
 480 static inline int obd_precreate(struct obd_export *exp, int need_create)
 481 {
 482         int rc;
 483         ENTRY;
 484
 485         EXP_CHECK_OP(exp, precreate);
 486         OBD_COUNTER_INCREMENT(exp->exp_obd, precreate);
 487
 488         rc = OBP(exp->exp_obd, precreate)(exp, need_create);
 489         RETURN(rc);
 490 }
 491
 492 static inline int obd_create(struct obd_export *exp, struct obdo *obdo,
 493                              struct lov_stripe_md **ea,
 494                              struct obd_trans_info *oti)
 495 {
 496         int rc;
 497         ENTRY;
 498
 499         EXP_CHECK_OP(exp, create);
 500         EXP_COUNTER_INCREMENT(exp, create);
 501
 502         rc = OBP(exp->exp_obd, create)(exp, obdo, ea, oti);
 503         RETURN(rc);
 504 }
 505
 506 static inline int obd_destroy(struct obd_export *exp, struct obdo *obdo,
 507                               struct lov_stripe_md *ea,
 508                               struct obd_trans_info *oti,
 509                               struct obd_export *md_exp)
 510 {
 511         int rc;
 512         ENTRY;
 513
 514         EXP_CHECK_OP(exp, destroy);
 515         EXP_COUNTER_INCREMENT(exp, destroy);
 516
 517         rc = OBP(exp->exp_obd, destroy)(exp, obdo, ea, oti, md_exp);
 518         RETURN(rc);
 519 }
 520
 521 static inline int obd_getattr(struct obd_export *exp, struct obd_info *oinfo)
 522 {
 523         int rc;
 524         ENTRY;
 525
 526         EXP_CHECK_OP(exp, getattr);
 527         EXP_COUNTER_INCREMENT(exp, getattr);
 528
 529         rc = OBP(exp->exp_obd, getattr)(exp, oinfo);
 530         RETURN(rc);
 531 }
 532
 533 static inline int obd_getattr_async(struct obd_export *exp,
 534                                     struct obd_info *oinfo,
 535                                     struct ptlrpc_request_set *set)
 536 {
 537         int rc;
 538         ENTRY;
 539
 540         EXP_CHECK_OP(exp, getattr_async);
 541         EXP_COUNTER_INCREMENT(exp, getattr_async);
 542
 543         rc = OBP(exp->exp_obd, getattr_async)(exp, oinfo, set);
 544         RETURN(rc);
 545 }
 546
 547 static inline int obd_setattr(struct obd_export *exp, struct obd_info *oinfo,
 548                               struct obd_trans_info *oti)
 549 {
 550         int rc;
 551         ENTRY;
 552
 553         EXP_CHECK_OP(exp, setattr);
 554         EXP_COUNTER_INCREMENT(exp, setattr);
 555
 556         rc = OBP(exp->exp_obd, setattr)(exp, oinfo, oti);
 557         RETURN(rc);
 558 }
 559
 560 /* This performs all the requests set init/wait/destroy actions. */
 561 static inline int obd_setattr_rqset(struct obd_export *exp,
 562                                     struct obd_info *oinfo,
 563                                     struct obd_trans_info *oti)
 564 {
 565         struct ptlrpc_request_set *set = NULL;
 566         int rc;
 567         ENTRY;
 568
 569         EXP_CHECK_OP(exp, setattr_async);
 570         EXP_COUNTER_INCREMENT(exp, setattr_async);
 571
 572         set =  ptlrpc_prep_set();
 573         if (set == NULL)
 574                 RETURN(-ENOMEM);
 575
 576         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 577         if (rc == 0)
 578                 rc = ptlrpc_set_wait(set);
 579         ptlrpc_set_destroy(set);
 580         RETURN(rc);
 581 }
 582
 583 /* This adds all the requests into @set if @set != NULL, otherwise
 584    all requests are sent asynchronously without waiting for response. */
 585 static inline int obd_setattr_async(struct obd_export *exp,
 586                                     struct obd_info *oinfo,
 587                                     struct obd_trans_info *oti,
 588                                     struct ptlrpc_request_set *set)
 589 {
 590         int rc;
 591         ENTRY;
 592
 593         EXP_CHECK_OP(exp, setattr_async);
 594         EXP_COUNTER_INCREMENT(exp, setattr_async);
 595
 596         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 597         RETURN(rc);
 598 }
 599
 600 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 601                                int priority)
 602 {
 603         struct obd_device *obd = imp->imp_obd;
 604         int rc;
 605         ENTRY;
 606
 607         OBD_CHECK_DEV_ACTIVE(obd);
 608         OBD_CHECK_OP(obd, add_conn, -EOPNOTSUPP);
 609         OBD_COUNTER_INCREMENT(obd, add_conn);
 610
 611         rc = OBP(obd, add_conn)(imp, uuid, priority);
 612         RETURN(rc);
 613 }
 614
 615 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 616 {
 617         struct obd_device *obd = imp->imp_obd;
 618         int rc;
 619         ENTRY;
 620
 621         OBD_CHECK_DEV_ACTIVE(obd);
 622         OBD_CHECK_OP(obd, del_conn, -EOPNOTSUPP);
 623         OBD_COUNTER_INCREMENT(obd, del_conn);
 624
 625         rc = OBP(obd, del_conn)(imp, uuid);
 626         RETURN(rc);
 627 }
 628
 629 static inline int obd_connect(struct lustre_handle *conn,struct obd_device *obd,
 630                               struct obd_uuid *cluuid,
 631                               struct obd_connect_data *d,
 632                               void *localdata)
 633 {
 634         int rc;
 635         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition check */
 636         ENTRY;
 637
 638         OBD_CHECK_DEV_ACTIVE(obd);
 639         OBD_CHECK_OP(obd, connect, -EOPNOTSUPP);
 640         OBD_COUNTER_INCREMENT(obd, connect);
 641
 642         rc = OBP(obd, connect)(conn, obd, cluuid, d, localdata);
 643         /* check that only subset is granted */
 644         LASSERT(ergo(d != NULL,
 645                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 646         RETURN(rc);
 647 }
 648
 649 static inline int obd_reconnect(struct obd_export *exp,
 650                                 struct obd_device *obd,
 651                                 struct obd_uuid *cluuid,
 652                                 struct obd_connect_data *d)
 653 {
 654         int rc;
 655         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition check */
 656         ENTRY;
 657
 658         OBD_CHECK_DEV_ACTIVE(obd);
 659         OBD_CHECK_OP(obd, reconnect, 0);
 660         OBD_COUNTER_INCREMENT(obd, reconnect);
 661
 662         rc = OBP(obd, reconnect)(exp, obd, cluuid, d);
 663         /* check that only subset is granted */
 664         LASSERT(ergo(d != NULL,
 665                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 666         RETURN(rc);
 667 }
 668
 669 static inline int obd_disconnect(struct obd_export *exp)
 670 {
 671         int rc;
 672         ENTRY;
 673
 674         EXP_CHECK_OP(exp, disconnect);
 675         EXP_COUNTER_INCREMENT(exp, disconnect);
 676
 677         rc = OBP(exp->exp_obd, disconnect)(exp);
 678         RETURN(rc);
 679 }
 680
 681 static inline int obd_ping(struct obd_export *exp)
 682 {
 683         int rc;
 684         ENTRY;
 685
 686         OBD_CHECK_OP(exp->exp_obd, ping, 0);
 687         EXP_COUNTER_INCREMENT(exp, ping);
 688
 689         rc = OBP(exp->exp_obd, ping)(exp);
 690         RETURN(rc);
 691 }
 692
 693 static inline int obd_init_export(struct obd_export *exp)
 694 {
 695         int rc = 0;
 696
 697         ENTRY;
 698         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
 699             OBP((exp)->exp_obd, init_export))
 700                 rc = OBP(exp->exp_obd, init_export)(exp);
 701         RETURN(rc);
 702 }
 703
 704 static inline int obd_destroy_export(struct obd_export *exp)
 705 {
 706         ENTRY;
 707         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
 708             OBP((exp)->exp_obd, destroy_export))
 709                 OBP(exp->exp_obd, destroy_export)(exp);
 710         RETURN(0);
 711 }
 712
 713 static inline int obd_extent_calc(struct obd_export *exp,
 714                                   struct lov_stripe_md *md,
 715                                   int cmd, obd_off *offset)
 716 {
 717         int rc;
 718         ENTRY;
 719         EXP_CHECK_OP(exp, extent_calc);
 720         rc = OBP(exp->exp_obd, extent_calc)(exp, md, cmd, offset);
 721         RETURN(rc);
 722 }
 723
 724 static inline struct dentry *
 725 obd_lvfs_fid2dentry(struct obd_export *exp, __u64 id_ino, __u32 gen, __u64 gr)
 726 {
 727         LASSERT(exp->exp_obd);
 728
 729         return lvfs_fid2dentry(&exp->exp_obd->obd_lvfs_ctxt, id_ino, gen, gr,
 730                                exp->exp_obd);
 731 }
 732
 733 #ifndef time_before
 734 #define time_before(t1, t2) ((long)t2 - (long)t1 > 0)
 735 #endif
 736
 737 /* @max_age is the oldest time in jiffies that we accept using a cached data.
 738  * If the cache is older than @max_age we will get a new value from the
 739  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
 740 static inline int obd_statfs_async(struct obd_device *obd,
 741                                    struct obd_info *oinfo,
 742                                    __u64 max_age,
 743                                    struct ptlrpc_request_set *rqset)
 744 {
 745         int rc = 0;
 746         ENTRY;
 747
 748         if (obd == NULL)
 749                 RETURN(-EINVAL);
 750
 751         OBD_CHECK_OP(obd, statfs, -EOPNOTSUPP);
 752         OBD_COUNTER_INCREMENT(obd, statfs);
 753
 754         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
 755                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
 756         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
 757                 rc = OBP(obd, statfs_async)(obd, oinfo, max_age, rqset);
 758         } else {
 759                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
 760                        " objects "LPU64"/"LPU64"\n",
 761                        obd->obd_name, &obd->obd_osfs,
 762                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
 763                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
 764                 spin_lock(&obd->obd_osfs_lock);
 765                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
 766                 spin_unlock(&obd->obd_osfs_lock);
 767                 if (oinfo->oi_cb_up)
 768                         oinfo->oi_cb_up(oinfo, 0);
 769         }
 770         RETURN(rc);
 771 }
 772
 773 static inline int obd_statfs_rqset(struct obd_device *obd,
 774                                    struct obd_statfs *osfs, __u64 max_age)
 775 {
 776         struct ptlrpc_request_set *set = NULL;
 777         struct obd_info oinfo = { { { 0 } } };
 778         int rc = 0;
 779         ENTRY;
 780
 781         set = ptlrpc_prep_set();
 782         if (set == NULL)
 783                 RETURN(-ENOMEM);
 784
 785         oinfo.oi_osfs = osfs;
 786         rc = obd_statfs_async(obd, &oinfo, max_age, set);
 787         if (rc == 0)
 788                 rc = ptlrpc_set_wait(set);
 789         ptlrpc_set_destroy(set);
 790         RETURN(rc);
 791 }
 792
 793 /* @max_age is the oldest time in jiffies that we accept using a cached data.
 794  * If the cache is older than @max_age we will get a new value from the
 795  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
 796 static inline int obd_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 797                              __u64 max_age)
 798 {
 799         int rc = 0;
 800         ENTRY;
 801
 802         if (obd == NULL)
 803                 RETURN(-EINVAL);
 804
 805         OBD_CHECK_OP(obd, statfs, -EOPNOTSUPP);
 806         OBD_COUNTER_INCREMENT(obd, statfs);
 807
 808         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
 809                obd->obd_osfs_age, max_age);
 810         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
 811                 rc = OBP(obd, statfs)(obd, osfs, max_age);
 812                 if (rc == 0) {
 813                         spin_lock(&obd->obd_osfs_lock);
 814                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
 815                         obd->obd_osfs_age = cfs_time_current_64();
 816                         spin_unlock(&obd->obd_osfs_lock);
 817                 }
 818         } else {
 819                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
 820                        " objects "LPU64"/"LPU64"\n",
 821                        obd->obd_name, &obd->obd_osfs,
 822                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
 823                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
 824                 spin_lock(&obd->obd_osfs_lock);
 825                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
 826                 spin_unlock(&obd->obd_osfs_lock);
 827         }
 828         RETURN(rc);
 829 }
 830
 831 static inline int obd_sync(struct obd_export *exp, struct obdo *oa,
 832                            struct lov_stripe_md *ea, obd_size start,
 833                            obd_size end)
 834 {
 835         int rc;
 836         ENTRY;
 837
 838         OBD_CHECK_OP(exp->exp_obd, sync, -EOPNOTSUPP);
 839         EXP_COUNTER_INCREMENT(exp, sync);
 840
 841         rc = OBP(exp->exp_obd, sync)(exp, oa, ea, start, end);
 842         RETURN(rc);
 843 }
 844
 845 static inline int obd_punch_rqset(struct obd_export *exp,
 846                                   struct obd_info *oinfo,
 847                                   struct obd_trans_info *oti)
 848 {
 849         struct ptlrpc_request_set *set = NULL;
 850         int rc;
 851         ENTRY;
 852
 853         EXP_CHECK_OP(exp, punch);
 854         EXP_COUNTER_INCREMENT(exp, punch);
 855
 856         set =  ptlrpc_prep_set();
 857         if (set == NULL)
 858                 RETURN(-ENOMEM);
 859
 860         rc = OBP(exp->exp_obd, punch)(exp, oinfo, oti, set);
 861         if (rc == 0)
 862                 rc = ptlrpc_set_wait(set);
 863         ptlrpc_set_destroy(set);
 864         RETURN(rc);
 865 }
 866
 867 static inline int obd_punch(struct obd_export *exp, struct obd_info *oinfo,
 868                             struct obd_trans_info *oti,
 869                             struct ptlrpc_request_set *rqset)
 870 {
 871         int rc;
 872         ENTRY;
 873
 874         EXP_CHECK_OP(exp, punch);
 875         EXP_COUNTER_INCREMENT(exp, punch);
 876
 877         rc = OBP(exp->exp_obd, punch)(exp, oinfo, oti, rqset);
 878         RETURN(rc);
 879 }
 880
 881 static inline int obd_brw(int cmd, struct obd_export *exp,
 882                           struct obd_info *oinfo, obd_count oa_bufs,
 883                           struct brw_page *pg, struct obd_trans_info *oti)
 884 {
 885         int rc;
 886         ENTRY;
 887
 888         EXP_CHECK_OP(exp, brw);
 889         EXP_COUNTER_INCREMENT(exp, brw);
 890
 891         if (!(cmd & (OBD_BRW_RWMASK | OBD_BRW_CHECK))) {
 892                 CERROR("obd_brw: cmd must be OBD_BRW_READ, OBD_BRW_WRITE, "
 893                        "or OBD_BRW_CHECK\n");
 894                 LBUG();
 895         }
 896
 897         rc = OBP(exp->exp_obd, brw)(cmd, exp, oinfo, oa_bufs, pg, oti);
 898         RETURN(rc);
 899 }
 900
 901 static inline int obd_brw_async(int cmd, struct obd_export *exp,
 902                                 struct obd_info *oinfo, obd_count oa_bufs,
 903                                 struct brw_page *pg, struct obd_trans_info *oti,
 904                                 struct ptlrpc_request_set *set)
 905 {
 906         int rc;
 907         ENTRY;
 908
 909         EXP_CHECK_OP(exp, brw_async);
 910         EXP_COUNTER_INCREMENT(exp, brw_async);
 911
 912         if (!(cmd & OBD_BRW_RWMASK)) {
 913                 CERROR("obd_brw: cmd must be OBD_BRW_READ or OBD_BRW_WRITE\n");
 914                 LBUG();
 915         }
 916
 917         rc = OBP(exp->exp_obd, brw_async)(cmd, exp, oinfo, oa_bufs, pg,oti,set);
 918         RETURN(rc);
 919 }
 920
 921 static inline int obd_brw_rqset(int cmd, struct obd_export *exp,
 922                                 struct obdo *oa, struct lov_stripe_md *lsm,
 923                                 obd_count oa_bufs, struct brw_page *pg,
 924                                 struct obd_trans_info *oti)
 925 {
 926         struct ptlrpc_request_set *set = NULL;
 927         struct obd_info oinfo = { { { 0 } } };
 928         int rc = 0;
 929         ENTRY;
 930
 931         set =  ptlrpc_prep_set();
 932         if (set == NULL)
 933                 RETURN(-ENOMEM);
 934
 935         oinfo.oi_oa = oa;
 936         oinfo.oi_md = lsm;
 937         rc = obd_brw_async(cmd, exp, &oinfo, oa_bufs, pg, oti, set);
 938         if (rc == 0) {
 939                 rc = ptlrpc_set_wait(set);
 940                 if (rc)
 941                         CERROR("error from callback: rc = %d\n", rc);
 942         } else {
 943                 CDEBUG(rc == -ENOSPC ? D_INODE : D_ERROR,
 944                        "error from obd_brw_async: rc = %d\n", rc);
 945         }
 946         ptlrpc_set_destroy(set);
 947         RETURN(rc);
 948 }
 949
 950 static inline  int obd_prep_async_page(struct obd_export *exp,
 951                                        struct lov_stripe_md *lsm,
 952                                        struct lov_oinfo *loi,
 953                                        cfs_page_t *page, obd_off offset,
 954                                        struct obd_async_page_ops *ops,
 955                                        void *data, void **res, int nocache,
 956                                        struct lustre_handle *lockh)
 957 {
 958         int ret;
 959         ENTRY;
 960
 961         OBD_CHECK_OP(exp->exp_obd, prep_async_page, -EOPNOTSUPP);
 962         EXP_COUNTER_INCREMENT(exp, prep_async_page);
 963
 964         ret = OBP(exp->exp_obd, prep_async_page)(exp, lsm, loi, page, offset,
 965                                                  ops, data, res, nocache,
 966                                                  lockh);
 967         RETURN(ret);
 968 }
 969
 970 static inline int obd_queue_async_io(struct obd_export *exp,
 971                                      struct lov_stripe_md *lsm,
 972                                      struct lov_oinfo *loi, void *cookie,
 973                                      int cmd, obd_off off, int count,
 974                                      obd_flag brw_flags, obd_flag async_flags)
 975 {
 976         int rc;
 977         ENTRY;
 978
 979         OBD_CHECK_OP(exp->exp_obd, queue_async_io, -EOPNOTSUPP);
 980         EXP_COUNTER_INCREMENT(exp, queue_async_io);
 981         LASSERT(cmd & OBD_BRW_RWMASK);
 982
 983         rc = OBP(exp->exp_obd, queue_async_io)(exp, lsm, loi, cookie, cmd, off,
 984                                                count, brw_flags, async_flags);
 985         RETURN(rc);
 986 }
 987
 988 static inline int obd_set_async_flags(struct obd_export *exp,
 989                                       struct lov_stripe_md *lsm,
 990                                       struct lov_oinfo *loi, void *cookie,
 991                                       obd_flag async_flags)
 992 {
 993         int rc;
 994         ENTRY;
 995
 996         OBD_CHECK_OP(exp->exp_obd, set_async_flags, -EOPNOTSUPP);
 997         EXP_COUNTER_INCREMENT(exp, set_async_flags);
 998
 999         rc = OBP(exp->exp_obd, set_async_flags)(exp, lsm, loi, cookie,
1000                                                 async_flags);
1001         RETURN(rc);
1002 }
1003
1004 static inline int obd_queue_group_io(struct obd_export *exp,
1005                                      struct lov_stripe_md *lsm,
1006                                      struct lov_oinfo *loi,
1007                                      struct obd_io_group *oig,
1008                                      void *cookie, int cmd, obd_off off,
1009                                      int count, obd_flag brw_flags,
1010                                      obd_flag async_flags)
1011 {
1012         int rc;
1013         ENTRY;
1014
1015         OBD_CHECK_OP(exp->exp_obd, queue_group_io, -EOPNOTSUPP);
1016         EXP_COUNTER_INCREMENT(exp, queue_group_io);
1017         LASSERT(cmd & OBD_BRW_RWMASK);
1018
1019         rc = OBP(exp->exp_obd, queue_group_io)(exp, lsm, loi, oig, cookie,
1020                                                cmd, off, count, brw_flags,
1021                                                async_flags);
1022         RETURN(rc);
1023 }
1024
1025 static inline int obd_trigger_group_io(struct obd_export *exp,
1026                                        struct lov_stripe_md *lsm,
1027                                        struct lov_oinfo *loi,
1028                                        struct obd_io_group *oig)
1029 {
1030         int rc;
1031         ENTRY;
1032
1033         OBD_CHECK_OP(exp->exp_obd, trigger_group_io, -EOPNOTSUPP);
1034         EXP_COUNTER_INCREMENT(exp, trigger_group_io);
1035
1036         rc = OBP(exp->exp_obd, trigger_group_io)(exp, lsm, loi, oig);
1037         RETURN(rc);
1038 }
1039
1040 static inline int obd_teardown_async_page(struct obd_export *exp,
1041                                           struct lov_stripe_md *lsm,
1042                                           struct lov_oinfo *loi, void *cookie)
1043 {
1044         int rc;
1045         ENTRY;
1046
1047         OBD_CHECK_OP(exp->exp_obd, teardown_async_page, -EOPNOTSUPP);
1048         EXP_COUNTER_INCREMENT(exp, teardown_async_page);
1049
1050         rc = OBP(exp->exp_obd, teardown_async_page)(exp, lsm, loi, cookie);
1051         RETURN(rc);
1052 }
1053
1054 static inline int obd_preprw(int cmd, struct obd_export *exp, struct obdo *oa,
1055                              int objcount, struct obd_ioobj *obj,
1056                              int niocount, struct niobuf_remote *remote,
1057                              struct niobuf_local *local,
1058                              struct obd_trans_info *oti)
1059 {
1060         int rc;
1061         ENTRY;
1062
1063         OBD_CHECK_OP(exp->exp_obd, preprw, -EOPNOTSUPP);
1064         EXP_COUNTER_INCREMENT(exp, preprw);
1065
1066         rc = OBP(exp->exp_obd, preprw)(cmd, exp, oa, objcount, obj, niocount,
1067                                        remote, local, oti);
1068         RETURN(rc);
1069 }
1070
1071 static inline int obd_commitrw(int cmd, struct obd_export *exp, struct obdo *oa,
1072                                int objcount, struct obd_ioobj *obj,
1073                                int niocount, struct niobuf_local *local,
1074                                struct obd_trans_info *oti, int rc)
1075 {
1076         ENTRY;
1077
1078         OBD_CHECK_OP(exp->exp_obd, commitrw, -EOPNOTSUPP);
1079         EXP_COUNTER_INCREMENT(exp, commitrw);
1080
1081         rc = OBP(exp->exp_obd, commitrw)(cmd, exp, oa, objcount, obj, niocount,
1082                                          local, oti, rc);
1083         RETURN(rc);
1084 }
1085
1086 static inline int obd_merge_lvb(struct obd_export *exp,
1087                                 struct lov_stripe_md *lsm,
1088                                 struct ost_lvb *lvb, int kms_only)
1089 {
1090         int rc;
1091         ENTRY;
1092
1093         OBD_CHECK_OP(exp->exp_obd, merge_lvb, -EOPNOTSUPP);
1094         EXP_COUNTER_INCREMENT(exp, merge_lvb);
1095
1096         rc = OBP(exp->exp_obd, merge_lvb)(exp, lsm, lvb, kms_only);
1097         RETURN(rc);
1098 }
1099
1100 static inline int obd_adjust_kms(struct obd_export *exp,
1101                                  struct lov_stripe_md *lsm, obd_off size,
1102                                  int shrink)
1103 {
1104         int rc;
1105         ENTRY;
1106
1107         OBD_CHECK_OP(exp->exp_obd, adjust_kms, -EOPNOTSUPP);
1108         EXP_COUNTER_INCREMENT(exp, adjust_kms);
1109
1110         rc = OBP(exp->exp_obd, adjust_kms)(exp, lsm, size, shrink);
1111         RETURN(rc);
1112 }
1113
1114 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1115                                 int len, void *karg, void *uarg)
1116 {
1117         int rc;
1118         ENTRY;
1119
1120         EXP_CHECK_OP(exp, iocontrol);
1121         EXP_COUNTER_INCREMENT(exp, iocontrol);
1122
1123         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1124         RETURN(rc);
1125 }
1126
1127 static inline int obd_enqueue_rqset(struct obd_export *exp,
1128                                     struct obd_info *oinfo,
1129                                     struct ldlm_enqueue_info *einfo)
1130 {
1131         struct ptlrpc_request_set *set = NULL;
1132         int rc;
1133         ENTRY;
1134
1135         EXP_CHECK_OP(exp, enqueue);
1136         EXP_COUNTER_INCREMENT(exp, enqueue);
1137
1138         set =  ptlrpc_prep_set();
1139         if (set == NULL)
1140                 RETURN(-ENOMEM);
1141
1142         rc = OBP(exp->exp_obd, enqueue)(exp, oinfo, einfo, set);
1143         if (rc == 0)
1144                 rc = ptlrpc_set_wait(set);
1145         ptlrpc_set_destroy(set);
1146         RETURN(rc);
1147 }
1148
1149 static inline int obd_enqueue(struct obd_export *exp,
1150                               struct obd_info *oinfo,
1151                               struct ldlm_enqueue_info *einfo,
1152                               struct ptlrpc_request_set *set)
1153 {
1154         int rc;
1155         ENTRY;
1156
1157         EXP_CHECK_OP(exp, enqueue);
1158         EXP_COUNTER_INCREMENT(exp, enqueue);
1159
1160         rc = OBP(exp->exp_obd, enqueue)(exp, oinfo, einfo, set);
1161         RETURN(rc);
1162 }
1163
1164 static inline int obd_match(struct obd_export *exp, struct lov_stripe_md *ea,
1165                             __u32 type, ldlm_policy_data_t *policy, __u32 mode,
1166                             int *flags, void *data, struct lustre_handle *lockh)
1167 {
1168         int rc;
1169         ENTRY;
1170
1171         EXP_CHECK_OP(exp, match);
1172         EXP_COUNTER_INCREMENT(exp, match);
1173
1174         rc = OBP(exp->exp_obd, match)(exp, ea, type, policy, mode, flags, data,
1175                                       lockh);
1176         RETURN(rc);
1177 }
1178
1179 static inline int obd_change_cbdata(struct obd_export *exp,
1180                                     struct lov_stripe_md *lsm,
1181                                     ldlm_iterator_t it, void *data)
1182 {
1183         int rc;
1184         ENTRY;
1185
1186         EXP_CHECK_OP(exp, change_cbdata);
1187         EXP_COUNTER_INCREMENT(exp, change_cbdata);
1188
1189         rc = OBP(exp->exp_obd, change_cbdata)(exp, lsm, it, data);
1190         RETURN(rc);
1191 }
1192
1193 static inline int obd_cancel(struct obd_export *exp,
1194                              struct lov_stripe_md *ea, __u32 mode,
1195                              struct lustre_handle *lockh)
1196 {
1197         int rc;
1198         ENTRY;
1199
1200         EXP_CHECK_OP(exp, cancel);
1201         EXP_COUNTER_INCREMENT(exp, cancel);
1202
1203         rc = OBP(exp->exp_obd, cancel)(exp, ea, mode, lockh);
1204         RETURN(rc);
1205 }
1206
1207 static inline int obd_cancel_unused(struct obd_export *exp,
1208                                     struct lov_stripe_md *ea, int flags,
1209                                     void *opaque)
1210 {
1211         int rc;
1212         ENTRY;
1213
1214         EXP_CHECK_OP(exp, cancel_unused);
1215         EXP_COUNTER_INCREMENT(exp, cancel_unused);
1216
1217         rc = OBP(exp->exp_obd, cancel_unused)(exp, ea, flags, opaque);
1218         RETURN(rc);
1219 }
1220
1221 static inline int obd_join_lru(struct obd_export *exp,
1222                                struct lov_stripe_md *ea, int join)
1223 {
1224         int rc;
1225         ENTRY;
1226
1227         EXP_CHECK_OP(exp, join_lru);
1228         EXP_COUNTER_INCREMENT(exp, join_lru);
1229
1230         rc = OBP(exp->exp_obd, join_lru)(exp, ea, join);
1231         RETURN(rc);
1232 }
1233
1234 static inline int obd_pin(struct obd_export *exp, obd_id ino, __u32 gen,
1235                           int type, struct obd_client_handle *handle, int flag)
1236 {
1237         int rc;
1238         ENTRY;
1239
1240         EXP_CHECK_OP(exp, pin);
1241         EXP_COUNTER_INCREMENT(exp, pin);
1242
1243         rc = OBP(exp->exp_obd, pin)(exp, ino, gen, type, handle, flag);
1244         RETURN(rc);
1245 }
1246
1247 static inline int obd_unpin(struct obd_export *exp,
1248                             struct obd_client_handle *handle, int flag)
1249 {
1250         int rc;
1251         ENTRY;
1252
1253         EXP_CHECK_OP(exp, unpin);
1254         EXP_COUNTER_INCREMENT(exp, unpin);
1255
1256         rc = OBP(exp->exp_obd, unpin)(exp, handle, flag);
1257         RETURN(rc);
1258 }
1259
1260
1261 static inline void obd_import_event(struct obd_device *obd,
1262                                     struct obd_import *imp,
1263                                     enum obd_import_event event)
1264 {
1265         ENTRY;
1266         if (!obd) {
1267                 CERROR("NULL device\n");
1268                 EXIT;
1269                 return;
1270         }
1271         if (obd->obd_set_up && OBP(obd, import_event)) {
1272                 OBD_COUNTER_INCREMENT(obd, import_event);
1273                 OBP(obd, import_event)(obd, imp, event);
1274         }
1275         EXIT;
1276 }
1277
1278 static inline int obd_notify(struct obd_device *obd,
1279                              struct obd_device *watched,
1280                              enum obd_notify_event ev, void *data)
1281 {
1282         ENTRY;
1283         OBD_CHECK_DEV(obd);
1284
1285         /* the check for async_recov is a complete hack - I'm hereby
1286            overloading the meaning to also mean "this was called from
1287            mds_postsetup".  I know that my mds is able to handle notifies
1288            by this point, and it needs to get them to execute mds_postrecov. */
1289         if (!obd->obd_set_up && !obd->obd_async_recov) {
1290                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1291                 RETURN(-EINVAL);
1292         }
1293
1294         if (!OBP(obd, notify))
1295                 RETURN(-ENOSYS);
1296
1297         OBD_COUNTER_INCREMENT(obd, notify);
1298         RETURN(OBP(obd, notify)(obd, watched, ev, data));
1299 }
1300
1301 static inline int obd_notify_observer(struct obd_device *observer,
1302                                       struct obd_device *observed,
1303                                       enum obd_notify_event ev, void *data)
1304 {
1305         int rc1;
1306         int rc2;
1307
1308         struct obd_notify_upcall *onu;
1309
1310         if (observer->obd_observer)
1311                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1312         else
1313                 rc1 = 0;
1314         /*
1315          * Also, call non-obd listener, if any
1316          */
1317         onu = &observer->obd_upcall;
1318         if (onu->onu_upcall != NULL)
1319                 rc2 = onu->onu_upcall(observer, observed, ev, onu->onu_owner);
1320         else
1321                 rc2 = 0;
1322
1323         return rc1 ?: rc2;
1324  }
1325
1326 static inline int obd_quotacheck(struct obd_export *exp,
1327                                  struct obd_quotactl *oqctl)
1328 {
1329         int rc;
1330         ENTRY;
1331
1332         EXP_CHECK_OP(exp, quotacheck);
1333         EXP_COUNTER_INCREMENT(exp, quotacheck);
1334
1335         rc = OBP(exp->exp_obd, quotacheck)(exp, oqctl);
1336         RETURN(rc);
1337 }
1338
1339 static inline int obd_quotactl(struct obd_export *exp,
1340                                struct obd_quotactl *oqctl)
1341 {
1342         int rc;
1343         ENTRY;
1344
1345         EXP_CHECK_OP(exp, quotactl);
1346         EXP_COUNTER_INCREMENT(exp, quotactl);
1347
1348         rc = OBP(exp->exp_obd, quotactl)(exp, oqctl);
1349         RETURN(rc);
1350 }
1351
1352 static inline int obd_health_check(struct obd_device *obd)
1353 {
1354         /* returns: 0 on healthy
1355          *         >0 on unhealthy + reason code/flag
1356          *            however the only suppored reason == 1 right now
1357          *            We'll need to define some better reasons
1358          *            or flags in the future.
1359          *         <0 on error
1360          */
1361         int rc;
1362         ENTRY;
1363
1364         /* don't use EXP_CHECK_OP, because NULL method is normal here */
1365         if (obd == NULL || !OBT(obd)) {
1366                 CERROR("cleaned up obd\n");
1367                 RETURN(-EOPNOTSUPP);
1368         }
1369         if (!obd->obd_set_up || obd->obd_stopping)
1370                 RETURN(0);
1371         if (!OBP(obd, health_check))
1372                 RETURN(0);
1373
1374         rc = OBP(obd, health_check)(obd);
1375         RETURN(rc);
1376 }
1377
1378 static inline int obd_register_observer(struct obd_device *obd,
1379                                         struct obd_device *observer)
1380 {
1381         ENTRY;
1382         OBD_CHECK_DEV(obd);
1383         if (obd->obd_observer && observer)
1384                 RETURN(-EALREADY);
1385         obd->obd_observer = observer;
1386         RETURN(0);
1387 }
1388
1389 static inline int obd_register_page_removal_cb(struct obd_export *exp,
1390                                                obd_page_removal_cb_t cb,
1391                                                obd_pin_extent_cb pin_cb)
1392 {
1393         int rc;
1394         ENTRY;
1395
1396         OBD_CHECK_OP(exp->exp_obd, register_page_removal_cb, 0);
1397         OBD_COUNTER_INCREMENT(exp->exp_obd, register_page_removal_cb);
1398
1399         rc = OBP(exp->exp_obd, register_page_removal_cb)(exp, cb, pin_cb);
1400         RETURN(rc);
1401 }
1402
1403 static inline int obd_unregister_page_removal_cb(struct obd_export *exp,
1404                                                  obd_page_removal_cb_t cb)
1405 {
1406         int rc;
1407         ENTRY;
1408
1409         OBD_CHECK_OP(exp->exp_obd, unregister_page_removal_cb, 0);
1410         OBD_COUNTER_INCREMENT(exp->exp_obd, unregister_page_removal_cb);
1411
1412         rc = OBP(exp->exp_obd, unregister_page_removal_cb)(exp, cb);
1413         RETURN(rc);
1414 }
1415
1416 static inline int obd_register_lock_cancel_cb(struct obd_export *exp,
1417                                               obd_lock_cancel_cb cb)
1418 {
1419         int rc;
1420         ENTRY;
1421
1422         OBD_CHECK_OP(exp->exp_obd, register_lock_cancel_cb, 0);
1423         OBD_COUNTER_INCREMENT(exp->exp_obd, register_lock_cancel_cb);
1424
1425         rc = OBP(exp->exp_obd, register_lock_cancel_cb)(exp, cb);
1426         RETURN(rc);
1427 }
1428
1429 static inline int obd_unregister_lock_cancel_cb(struct obd_export *exp,
1430                                                  obd_lock_cancel_cb cb)
1431 {
1432         int rc;
1433         ENTRY;
1434
1435         OBD_CHECK_OP(exp->exp_obd, unregister_lock_cancel_cb, 0);
1436         OBD_COUNTER_INCREMENT(exp->exp_obd, unregister_lock_cancel_cb);
1437
1438         rc = OBP(exp->exp_obd, unregister_lock_cancel_cb)(exp, cb);
1439         RETURN(rc);
1440 }
1441
1442 /* OBD Metadata Support */
1443
1444 extern int obd_init_caches(void);
1445 extern void obd_cleanup_caches(void);
1446
1447 /* support routines */
1448 extern cfs_mem_cache_t *obdo_cachep;
1449
1450 #define OBDO_ALLOC(ptr)                                                       \
1451 do {                                                                          \
1452         OBD_SLAB_ALLOC_PTR((ptr), obdo_cachep);                               \
1453 } while(0)
1454
1455 #define OBDO_FREE(ptr)                                                        \
1456 do {                                                                          \
1457         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1458 } while(0)
1459
1460 /* I'm as embarrassed about this as you are.
1461  *
1462  * <shaver> // XXX do not look into _superhack with remaining eye
1463  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1464 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1465
1466 /* sysctl.c */
1467 extern void obd_sysctl_init (void);
1468 extern void obd_sysctl_clean (void);
1469
1470 /* uuid.c  */
1471 typedef __u8 class_uuid_t[16];
1472 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
1473
1474 /* lustre_peer.c    */
1475 int lustre_uuid_to_peer(char *uuid, lnet_nid_t *peer_nid, int index);
1476 int class_add_uuid(char *uuid, __u64 nid);
1477 int class_del_uuid (char *uuid);
1478 void class_init_uuidlist(void);
1479 void class_exit_uuidlist(void);
1480
1481 /* prng.c */
1482 void ll_generate_random_uuid(class_uuid_t uuid_out);
1483
1484 #endif /* __LINUX_OBD_CLASS_H */