lustre/include/obd_class.h

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #ifndef __CLASS_OBD_H
  37 #define __CLASS_OBD_H
  38
  39 #ifndef __KERNEL__
  40 # include <liblustre.h>
  41 #endif
  42
  43 #include <obd_support.h>
  44 #include <lustre_import.h>
  45 #include <lustre_net.h>
  46 #include <obd.h>
  47 #include <lustre_lib.h>
  48 #include <lustre/lustre_idl.h>
  49 #include <lprocfs_status.h>
  50
  51 #if defined(__linux__)
  52 #include <linux/obd_class.h>
  53 #elif defined(__APPLE__)
  54 #include <darwin/obd_class.h>
  55 #elif defined(__WINNT__)
  56 #include <winnt/obd_class.h>
  57 #else
  58 #error Unsupported operating system.
  59 #endif
  60
  61 #define OBD_STATFS_NODELAY      0x0001  /* requests should be send without delay
  62                                          * and resends for avoid deadlocks */
  63 #define OBD_STATFS_FROM_CACHE   0x0002  /* the statfs callback should not update
  64                                          * obd_osfs_age */
  65 #define OBD_STATFS_PTLRPCD      0x0004  /* requests will be sent via ptlrpcd
  66                                          * instead of a specific set. This
  67                                          * means that we cannot rely on the set
  68                                          * interpret routine to be called.
  69                                          * lov_statfs_fini() must thus be called
  70                                          * by the request interpret routine */
  71 #define OBD_STATFS_FOR_MDT0     0x0008  /* The statfs is only for retrieving
  72                                          * information from MDT0. */
  73 #define OBD_FL_PUNCH    0x00000001      /* To indicate it is punch operation */
  74
  75 /* OBD Device Declarations */
  76 extern struct obd_device *obd_devs[MAX_OBD_DEVICES];
  77 extern rwlock_t obd_dev_lock;
  78
  79 /* OBD Operations Declarations */
  80 extern struct obd_device *class_conn2obd(struct lustre_handle *);
  81 extern struct obd_device *class_exp2obd(struct obd_export *);
  82 extern int class_handle_ioctl(unsigned int cmd, unsigned long arg);
  83 extern int lustre_get_jobid(char *jobid);
  84
  85 struct lu_device_type;
  86
  87 /* genops.c */
  88 struct obd_export *class_conn2export(struct lustre_handle *);
  89 int class_register_type(struct obd_ops *, struct md_ops *,
  90                         struct lprocfs_vars *, const char *nm,
  91                         struct lu_device_type *ldt);
  92 int class_unregister_type(const char *nm);
  93
  94 struct obd_device *class_newdev(const char *type_name, const char *name);
  95 void class_release_dev(struct obd_device *obd);
  96
  97 int class_name2dev(const char *name);
  98 struct obd_device *class_name2obd(const char *name);
  99 int class_uuid2dev(struct obd_uuid *uuid);
 100 struct obd_device *class_uuid2obd(struct obd_uuid *uuid);
 101 void class_obd_list(void);
 102 struct obd_device * class_find_client_obd(struct obd_uuid *tgt_uuid,
 103                                           const char * typ_name,
 104                                           struct obd_uuid *grp_uuid);
 105 struct obd_device * class_devices_in_group(struct obd_uuid *grp_uuid,
 106                                            int *next);
 107 struct obd_device * class_num2obd(int num);
 108 int get_devices_count(void);
 109
 110 int class_notify_sptlrpc_conf(const char *fsname, int namelen);
 111
 112 char *obd_export_nid2str(struct obd_export *exp);
 113
 114 int obd_export_evict_by_nid(struct obd_device *obd, const char *nid);
 115 int obd_export_evict_by_uuid(struct obd_device *obd, const char *uuid);
 116 int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep);
 117
 118 int obd_zombie_impexp_init(void);
 119 void obd_zombie_impexp_stop(void);
 120 void obd_zombie_impexp_cull(void);
 121 void obd_zombie_barrier(void);
 122 void obd_exports_barrier(struct obd_device *obd);
 123 int kuc_len(int payload_len);
 124 struct kuc_hdr * kuc_ptr(void *p);
 125 int kuc_ispayload(void *p);
 126 void *kuc_alloc(int payload_len, int transport, int type);
 127 void kuc_free(void *p, int payload_len);
 128
 129 struct llog_handle;
 130 struct llog_rec_hdr;
 131 typedef int (*llog_cb_t)(const struct lu_env *, struct llog_handle *,
 132                          struct llog_rec_hdr *, void *);
 133 /* obd_config.c */
 134 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
 135                                      const char *new_name);
 136 int class_process_config(struct lustre_cfg *lcfg);
 137 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 138                              struct lustre_cfg *lcfg, void *data);
 139 int class_attach(struct lustre_cfg *lcfg);
 140 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
 141 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg);
 142 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg);
 143 struct obd_device *class_incref(struct obd_device *obd,
 144                                 const char *scope, const void *source);
 145 void class_decref(struct obd_device *obd,
 146                   const char *scope, const void *source);
 147 void dump_exports(struct obd_device *obd, int locks);
 148 int class_config_llog_handler(const struct lu_env *env,
 149                               struct llog_handle *handle,
 150                               struct llog_rec_hdr *rec, void *data);
 151 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg);
 152 int class_add_uuid(const char *uuid, __u64 nid);
 153
 154 /*obdecho*/
 155 #ifdef LPROCFS
 156 extern void lprocfs_echo_init_vars(struct lprocfs_static_vars *lvars);
 157 #else
 158 static inline void lprocfs_echo_init_vars(struct lprocfs_static_vars *lvars)
 159 {
 160         memset(lvars, 0, sizeof(*lvars));
 161 }
 162 #endif
 163
 164 #define CFG_F_START     0x01   /* Set when we start updating from a log */
 165 #define CFG_F_MARKER    0x02   /* We are within a maker */
 166 #define CFG_F_SKIP      0x04   /* We should ignore this cfg command */
 167 #define CFG_F_COMPAT146 0x08   /* Allow old-style logs */
 168 #define CFG_F_EXCLUDE   0x10   /* OST exclusion list */
 169
 170 /* Passed as data param to class_config_parse_llog */
 171 struct config_llog_instance {
 172         char               *cfg_obdname;
 173         void               *cfg_instance;
 174         struct super_block *cfg_sb;
 175         struct obd_uuid     cfg_uuid;
 176         llog_cb_t           cfg_callback;
 177         int                 cfg_last_idx; /* for partial llog processing */
 178         int                 cfg_flags;
 179 };
 180 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 181                             char *name, struct config_llog_instance *cfg);
 182 int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 183                            char *name, struct config_llog_instance *cfg);
 184
 185 enum {
 186         CONFIG_T_CONFIG  = 0,
 187         CONFIG_T_SPTLRPC = 1,
 188         CONFIG_T_RECOVER = 2,
 189         CONFIG_T_MAX     = 3
 190 };
 191
 192 /* list of active configuration logs  */
 193 struct config_llog_data {
 194         struct ldlm_res_id          cld_resid;
 195         struct config_llog_instance cld_cfg;
 196         cfs_list_t                  cld_list_chain;
 197         cfs_atomic_t                cld_refcount;
 198         struct config_llog_data    *cld_sptlrpc;/* depended sptlrpc log */
 199         struct config_llog_data    *cld_recover;    /* imperative recover log */
 200         struct obd_export          *cld_mgcexp;
 201         struct mutex                cld_lock;
 202         int                         cld_type;
 203         unsigned int                cld_stopping:1, /* we were told to stop
 204                                                      * watching */
 205                                     cld_lostlock:1; /* lock not requeued */
 206         char                        cld_logname[0];
 207 };
 208
 209 struct lustre_profile {
 210         cfs_list_t       lp_list;
 211         char            *lp_profile;
 212         char            *lp_dt;
 213         char            *lp_md;
 214 };
 215
 216 struct lustre_profile *class_get_profile(const char * prof);
 217 void class_del_profile(const char *prof);
 218 void class_del_profiles(void);
 219
 220 #if LUSTRE_TRACKS_LOCK_EXP_REFS
 221
 222 void __class_export_add_lock_ref(struct obd_export *, struct ldlm_lock *);
 223 void __class_export_del_lock_ref(struct obd_export *, struct ldlm_lock *);
 224 extern void (*class_export_dump_hook)(struct obd_export *);
 225
 226 #else
 227
 228 #define __class_export_add_lock_ref(exp, lock)             do {} while(0)
 229 #define __class_export_del_lock_ref(exp, lock)             do {} while(0)
 230
 231 #endif
 232
 233 #define class_export_rpc_get(exp)                                       \
 234 ({                                                                      \
 235         cfs_atomic_inc(&(exp)->exp_rpc_count);                          \
 236         CDEBUG(D_INFO, "RPC GETting export %p : new rpc_count %d\n",    \
 237                (exp), cfs_atomic_read(&(exp)->exp_rpc_count));          \
 238         class_export_get(exp);                                          \
 239 })
 240
 241 #define class_export_rpc_put(exp)                                       \
 242 ({                                                                      \
 243         LASSERT_ATOMIC_POS(&exp->exp_rpc_count);                        \
 244         cfs_atomic_dec(&(exp)->exp_rpc_count);                          \
 245         CDEBUG(D_INFO, "RPC PUTting export %p : new rpc_count %d\n",    \
 246                (exp), cfs_atomic_read(&(exp)->exp_rpc_count));          \
 247         class_export_put(exp);                                          \
 248 })
 249
 250 #define class_export_lock_get(exp, lock)                                \
 251 ({                                                                      \
 252         cfs_atomic_inc(&(exp)->exp_locks_count);                        \
 253         __class_export_add_lock_ref(exp, lock);                         \
 254         CDEBUG(D_INFO, "lock GETting export %p : new locks_count %d\n", \
 255                (exp), cfs_atomic_read(&(exp)->exp_locks_count));        \
 256         class_export_get(exp);                                          \
 257 })
 258
 259 #define class_export_lock_put(exp, lock)                                \
 260 ({                                                                      \
 261         LASSERT_ATOMIC_POS(&exp->exp_locks_count);                      \
 262         cfs_atomic_dec(&(exp)->exp_locks_count);                        \
 263         __class_export_del_lock_ref(exp, lock);                         \
 264         CDEBUG(D_INFO, "lock PUTting export %p : new locks_count %d\n", \
 265                (exp), cfs_atomic_read(&(exp)->exp_locks_count));        \
 266         class_export_put(exp);                                          \
 267 })
 268
 269 #define class_export_cb_get(exp)                                        \
 270 ({                                                                      \
 271         cfs_atomic_inc(&(exp)->exp_cb_count);                           \
 272         CDEBUG(D_INFO, "callback GETting export %p : new cb_count %d\n",\
 273                (exp), cfs_atomic_read(&(exp)->exp_cb_count));           \
 274         class_export_get(exp);                                          \
 275 })
 276
 277 #define class_export_cb_put(exp)                                        \
 278 ({                                                                      \
 279         LASSERT_ATOMIC_POS(&exp->exp_cb_count);                         \
 280         cfs_atomic_dec(&(exp)->exp_cb_count);                           \
 281         CDEBUG(D_INFO, "callback PUTting export %p : new cb_count %d\n",\
 282                (exp), cfs_atomic_read(&(exp)->exp_cb_count));           \
 283         class_export_put(exp);                                          \
 284 })
 285
 286 /* genops.c */
 287 struct obd_export *class_export_get(struct obd_export *exp);
 288 void class_export_put(struct obd_export *exp);
 289 struct obd_export *class_new_export(struct obd_device *obddev,
 290                                     struct obd_uuid *cluuid);
 291 void class_unlink_export(struct obd_export *exp);
 292
 293 struct obd_import *class_import_get(struct obd_import *);
 294 void class_import_put(struct obd_import *);
 295 struct obd_import *class_new_import(struct obd_device *obd);
 296 void class_destroy_import(struct obd_import *exp);
 297
 298 struct obd_type *class_search_type(const char *name);
 299 struct obd_type *class_get_type(const char *name);
 300 void class_put_type(struct obd_type *type);
 301 int class_connect(struct lustre_handle *conn, struct obd_device *obd,
 302                   struct obd_uuid *cluuid);
 303 int class_disconnect(struct obd_export *exp);
 304 void class_fail_export(struct obd_export *exp);
 305 int class_connected_export(struct obd_export *exp);
 306 void class_disconnect_exports(struct obd_device *obddev);
 307 int class_manual_cleanup(struct obd_device *obd);
 308 void class_disconnect_stale_exports(struct obd_device *,
 309                                     int (*test_export)(struct obd_export *));
 310 static inline enum obd_option exp_flags_from_obd(struct obd_device *obd)
 311 {
 312         return ((obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 313                 (obd->obd_force ? OBD_OPT_FORCE : 0) |
 314                 (obd->obd_abort_recovery ? OBD_OPT_ABORT_RECOV : 0) |
 315                 0);
 316 }
 317
 318 #ifdef HAVE_SERVER_SUPPORT
 319 static inline struct lu_target *class_exp2tgt(struct obd_export *exp)
 320 {
 321         LASSERT(exp->exp_obd);
 322         return exp->exp_obd->u.obt.obt_lut;
 323 }
 324
 325 static inline struct lr_server_data *class_server_data(struct obd_device *obd)
 326 {
 327         LASSERT(obd->u.obt.obt_lut);
 328         return &obd->u.obt.obt_lut->lut_lsd;
 329 }
 330 #endif
 331
 332 void obdo_cpy_md(struct obdo *dst, struct obdo *src, obd_flag valid);
 333 void obdo_to_ioobj(struct obdo *oa, struct obd_ioobj *ioobj);
 334 void obdo_from_iattr(struct obdo *oa, struct iattr *attr,
 335                      unsigned int ia_valid);
 336 void iattr_from_obdo(struct iattr *attr, struct obdo *oa, obd_flag valid);
 337 void md_from_obdo(struct md_op_data *op_data, struct obdo *oa, obd_flag valid);
 338 void obdo_from_md(struct obdo *oa, struct md_op_data *op_data,
 339                   unsigned int valid);
 340
 341 #define OBT(dev)        (dev)->obd_type
 342 #define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 343 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
 344 #define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
 345
 346 /* Ensure obd_setup: used for cleanup which must be called
 347    while obd is stopping */
 348 #define OBD_CHECK_DEV(obd)                                      \
 349 do {                                                            \
 350         if (!(obd)) {                                           \
 351                 CERROR("NULL device\n");                        \
 352                 RETURN(-ENODEV);                                \
 353         }                                                       \
 354 } while (0)
 355
 356 /* ensure obd_setup and !obd_stopping */
 357 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 358 do {                                                            \
 359         OBD_CHECK_DEV(obd);                                     \
 360         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 361                 CERROR("Device %d not setup\n",                 \
 362                        (obd)->obd_minor);                       \
 363                 RETURN(-ENODEV);                                \
 364         }                                                       \
 365 } while (0)
 366
 367
 368 #ifdef LPROCFS
 369 #define OBD_COUNTER_OFFSET(op)                                  \
 370         ((offsetof(struct obd_ops, o_ ## op) -                  \
 371           offsetof(struct obd_ops, o_iocontrol))                \
 372          / sizeof(((struct obd_ops *)(0))->o_iocontrol))
 373
 374 #define OBD_COUNTER_INCREMENT(obdx, op)                           \
 375         if ((obdx)->obd_stats != NULL) {                          \
 376                 unsigned int coffset;                             \
 377                 coffset = (unsigned int)((obdx)->obd_cntr_base) + \
 378                         OBD_COUNTER_OFFSET(op);                   \
 379                 LASSERT(coffset < (obdx)->obd_stats->ls_num);     \
 380                 lprocfs_counter_incr((obdx)->obd_stats, coffset); \
 381         }
 382
 383 #define EXP_COUNTER_INCREMENT(export, op)                                    \
 384         if ((export)->exp_obd->obd_stats != NULL) {                          \
 385                 unsigned int coffset;                                        \
 386                 coffset = (unsigned int)((export)->exp_obd->obd_cntr_base) + \
 387                         OBD_COUNTER_OFFSET(op);                              \
 388                 LASSERT(coffset < (export)->exp_obd->obd_stats->ls_num);     \
 389                 lprocfs_counter_incr((export)->exp_obd->obd_stats, coffset); \
 390                 if ((export)->exp_nid_stats != NULL &&                       \
 391                     (export)->exp_nid_stats->nid_stats != NULL)              \
 392                         lprocfs_counter_incr(                                \
 393                                 (export)->exp_nid_stats->nid_stats, coffset);\
 394         }
 395
 396 #define MD_COUNTER_OFFSET(op)                                   \
 397         ((offsetof(struct md_ops, m_ ## op) -                   \
 398           offsetof(struct md_ops, m_getstatus))                 \
 399          / sizeof(((struct md_ops *)(0))->m_getstatus))
 400
 401 #define MD_COUNTER_INCREMENT(obdx, op)                           \
 402         if ((obd)->md_stats != NULL) {                           \
 403                 unsigned int coffset;                            \
 404                 coffset = (unsigned int)((obdx)->md_cntr_base) + \
 405                         MD_COUNTER_OFFSET(op);                   \
 406                 LASSERT(coffset < (obdx)->md_stats->ls_num);     \
 407                 lprocfs_counter_incr((obdx)->md_stats, coffset); \
 408         }
 409
 410 #define EXP_MD_COUNTER_INCREMENT(export, op)                                 \
 411         if ((export)->exp_obd->obd_stats != NULL) {                          \
 412                 unsigned int coffset;                                        \
 413                 coffset = (unsigned int)((export)->exp_obd->md_cntr_base) +  \
 414                         MD_COUNTER_OFFSET(op);                               \
 415                 LASSERT(coffset < (export)->exp_obd->md_stats->ls_num);      \
 416                 lprocfs_counter_incr((export)->exp_obd->md_stats, coffset);  \
 417                 if ((export)->exp_md_stats != NULL)                          \
 418                         lprocfs_counter_incr(                                \
 419                                 (export)->exp_md_stats, coffset);            \
 420         }
 421
 422 #else
 423 #define OBD_COUNTER_OFFSET(op)
 424 #define OBD_COUNTER_INCREMENT(obd, op)
 425 #define EXP_COUNTER_INCREMENT(exp, op)
 426 #define MD_COUNTER_INCREMENT(obd, op)
 427 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 428 #endif
 429
 430 static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
 431 {
 432         /* Always add in ldlm_stats */
 433         tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC
 434                                                   ,LPROCFS_STATS_FLAG_NOPERCPU);
 435         if (tmp->nid_ldlm_stats == NULL)
 436                 return -ENOMEM;
 437
 438         lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
 439
 440         return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
 441                                       tmp->nid_ldlm_stats);
 442 }
 443
 444 #define OBD_CHECK_MD_OP(obd, op, err)                           \
 445 do {                                                            \
 446         if (!OBT(obd) || !MDP((obd), op)) {                     \
 447                 if (err)                                        \
 448                         CERROR("md_" #op ": dev %s/%d no operation\n", \
 449                                obd->obd_name, obd->obd_minor);  \
 450                 RETURN(err);                                    \
 451         }                                                       \
 452 } while (0)
 453
 454 #define EXP_CHECK_MD_OP(exp, op)                                \
 455 do {                                                            \
 456         if ((exp) == NULL) {                                    \
 457                 CERROR("obd_" #op ": NULL export\n");           \
 458                 RETURN(-ENODEV);                                \
 459         }                                                       \
 460         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 461                 CERROR("obd_" #op ": cleaned up obd\n");        \
 462                 RETURN(-EOPNOTSUPP);                            \
 463         }                                                       \
 464         if (!OBT((exp)->exp_obd) || !MDP((exp)->exp_obd, op)) { \
 465                 CERROR("obd_" #op ": dev %s/%d no operation\n", \
 466                        (exp)->exp_obd->obd_name,                \
 467                        (exp)->exp_obd->obd_minor);              \
 468                 RETURN(-EOPNOTSUPP);                            \
 469         }                                                       \
 470 } while (0)
 471
 472
 473 #define OBD_CHECK_DT_OP(obd, op, err)                           \
 474 do {                                                            \
 475         if (!OBT(obd) || !OBP((obd), op)) {                     \
 476                 if (err)                                        \
 477                         CERROR("obd_" #op ": dev %d no operation\n",    \
 478                                obd->obd_minor);                 \
 479                 RETURN(err);                                    \
 480         }                                                       \
 481 } while (0)
 482
 483 #define EXP_CHECK_DT_OP(exp, op)                                \
 484 do {                                                            \
 485         if ((exp) == NULL) {                                    \
 486                 CERROR("obd_" #op ": NULL export\n");           \
 487                 RETURN(-ENODEV);                                \
 488         }                                                       \
 489         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 490                 CERROR("obd_" #op ": cleaned up obd\n");        \
 491                 RETURN(-EOPNOTSUPP);                            \
 492         }                                                       \
 493         if (!OBT((exp)->exp_obd) || !OBP((exp)->exp_obd, op)) { \
 494                 CERROR("obd_" #op ": dev %d no operation\n",    \
 495                        (exp)->exp_obd->obd_minor);              \
 496                 RETURN(-EOPNOTSUPP);                            \
 497         }                                                       \
 498 } while (0)
 499
 500 #define CTXT_CHECK_OP(ctxt, op, err)                                 \
 501 do {                                                                 \
 502         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {             \
 503                 if (err)                                             \
 504                         CERROR("lop_" #op ": dev %d no operation\n", \
 505                                ctxt->loc_obd->obd_minor);            \
 506                 RETURN(err);                                         \
 507         }                                                            \
 508 } while (0)
 509
 510 static inline int class_devno_max(void)
 511 {
 512         return MAX_OBD_DEVICES;
 513 }
 514
 515 static inline int obd_get_info(const struct lu_env *env,
 516                                struct obd_export *exp, __u32 keylen,
 517                                void *key, __u32 *vallen, void *val,
 518                                struct lov_stripe_md *lsm)
 519 {
 520         int rc;
 521         ENTRY;
 522
 523         EXP_CHECK_DT_OP(exp, get_info);
 524         EXP_COUNTER_INCREMENT(exp, get_info);
 525
 526         rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val,
 527                                          lsm);
 528         RETURN(rc);
 529 }
 530
 531 static inline int obd_set_info_async(const struct lu_env *env,
 532                                      struct obd_export *exp, obd_count keylen,
 533                                      void *key, obd_count vallen, void *val,
 534                                      struct ptlrpc_request_set *set)
 535 {
 536         int rc;
 537         ENTRY;
 538
 539         EXP_CHECK_DT_OP(exp, set_info_async);
 540         EXP_COUNTER_INCREMENT(exp, set_info_async);
 541
 542         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 543                                                val, set);
 544         RETURN(rc);
 545 }
 546
 547 /*
 548  * obd-lu integration.
 549  *
 550  * Functionality is being moved into new lu_device-based layering, but some
 551  * pieces of configuration process are still based on obd devices.
 552  *
 553  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 554  * subsume ->o_setup() methods of obd devices they replace. The same for
 555  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 556  * result, obd_setup() and obd_process_config() branch and call one XOR
 557  * another.
 558  *
 559  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 560  * lu_device_type_operations::ldto_device_free() fully implement the
 561  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 562  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 563  */
 564
 565 #define DECLARE_LU_VARS(ldt, d)                 \
 566         struct lu_device_type *ldt;       \
 567         struct lu_device *d
 568
 569 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 570 {
 571         int rc;
 572         DECLARE_LU_VARS(ldt, d);
 573         ENTRY;
 574
 575         ldt = obd->obd_type->typ_lu;
 576         if (ldt != NULL) {
 577                 struct lu_context  session_ctx;
 578                 struct lu_env env;
 579                 lu_context_init(&session_ctx, LCT_SESSION);
 580                 session_ctx.lc_thread = NULL;
 581                 lu_context_enter(&session_ctx);
 582
 583                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 584                 if (rc == 0) {
 585                         env.le_ses = &session_ctx;
 586                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 587                         lu_env_fini(&env);
 588                         if (!IS_ERR(d)) {
 589                                 obd->obd_lu_dev = d;
 590                                 d->ld_obd = obd;
 591                                 rc = 0;
 592                         } else
 593                                 rc = PTR_ERR(d);
 594                 }
 595                 lu_context_exit(&session_ctx);
 596                 lu_context_fini(&session_ctx);
 597
 598         } else {
 599                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
 600                 OBD_COUNTER_INCREMENT(obd, setup);
 601                 rc = OBP(obd, setup)(obd, cfg);
 602         }
 603         RETURN(rc);
 604 }
 605
 606 static inline int obd_precleanup(struct obd_device *obd,
 607                                  enum obd_cleanup_stage cleanup_stage)
 608 {
 609         int rc;
 610         DECLARE_LU_VARS(ldt, d);
 611         ENTRY;
 612
 613         OBD_CHECK_DEV(obd);
 614         ldt = obd->obd_type->typ_lu;
 615         d = obd->obd_lu_dev;
 616         if (ldt != NULL && d != NULL) {
 617                 if (cleanup_stage == OBD_CLEANUP_EXPORTS) {
 618                         struct lu_env env;
 619
 620                         rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 621                         if (rc == 0) {
 622                                 ldt->ldt_ops->ldto_device_fini(&env, d);
 623                                 lu_env_fini(&env);
 624                         }
 625                 }
 626         }
 627         OBD_CHECK_DT_OP(obd, precleanup, 0);
 628         OBD_COUNTER_INCREMENT(obd, precleanup);
 629
 630         rc = OBP(obd, precleanup)(obd, cleanup_stage);
 631         RETURN(rc);
 632 }
 633
 634 static inline int obd_cleanup(struct obd_device *obd)
 635 {
 636         int rc;
 637         DECLARE_LU_VARS(ldt, d);
 638         ENTRY;
 639
 640         OBD_CHECK_DEV(obd);
 641
 642         ldt = obd->obd_type->typ_lu;
 643         d = obd->obd_lu_dev;
 644         if (ldt != NULL && d != NULL) {
 645                 struct lu_env env;
 646
 647                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 648                 if (rc == 0) {
 649                         ldt->ldt_ops->ldto_device_free(&env, d);
 650                         lu_env_fini(&env);
 651                         obd->obd_lu_dev = NULL;
 652                 }
 653         }
 654         OBD_CHECK_DT_OP(obd, cleanup, 0);
 655         OBD_COUNTER_INCREMENT(obd, cleanup);
 656
 657         rc = OBP(obd, cleanup)(obd);
 658         RETURN(rc);
 659 }
 660
 661 static inline void obd_cleanup_client_import(struct obd_device *obd)
 662 {
 663         ENTRY;
 664
 665         /* If we set up but never connected, the
 666            client import will not have been cleaned. */
 667         down_write(&obd->u.cli.cl_sem);
 668         if (obd->u.cli.cl_import) {
 669                 struct obd_import *imp;
 670                 imp = obd->u.cli.cl_import;
 671                 CDEBUG(D_CONFIG, "%s: client import never connected\n",
 672                        obd->obd_name);
 673                 ptlrpc_invalidate_import(imp);
 674                 if (imp->imp_rq_pool) {
 675                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
 676                         imp->imp_rq_pool = NULL;
 677                 }
 678                 client_destroy_import(imp);
 679                 obd->u.cli.cl_import = NULL;
 680         }
 681         up_write(&obd->u.cli.cl_sem);
 682
 683         EXIT;
 684 }
 685
 686 static inline int
 687 obd_process_config(struct obd_device *obd, int datalen, void *data)
 688 {
 689         int rc;
 690         DECLARE_LU_VARS(ldt, d);
 691         ENTRY;
 692
 693         OBD_CHECK_DEV(obd);
 694
 695         obd->obd_process_conf = 1;
 696         ldt = obd->obd_type->typ_lu;
 697         d = obd->obd_lu_dev;
 698         if (ldt != NULL && d != NULL) {
 699                 struct lu_env env;
 700
 701                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 702                 if (rc == 0) {
 703                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 704                         lu_env_fini(&env);
 705                 }
 706         } else {
 707                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
 708                 rc = OBP(obd, process_config)(obd, datalen, data);
 709         }
 710         OBD_COUNTER_INCREMENT(obd, process_config);
 711         obd->obd_process_conf = 0;
 712
 713         RETURN(rc);
 714 }
 715
 716 /* Pack an in-memory MD struct for storage on disk.
 717  * Returns +ve size of packed MD (0 for free), or -ve error.
 718  *
 719  * If @disk_tgt == NULL, MD size is returned (max size if @mem_src == NULL).
 720  * If @*disk_tgt != NULL and @mem_src == NULL, @*disk_tgt will be freed.
 721  * If @*disk_tgt == NULL, it will be allocated
 722  */
 723 static inline int obd_packmd(struct obd_export *exp,
 724                              struct lov_mds_md **disk_tgt,
 725                              struct lov_stripe_md *mem_src)
 726 {
 727         int rc;
 728         ENTRY;
 729
 730         EXP_CHECK_DT_OP(exp, packmd);
 731         EXP_COUNTER_INCREMENT(exp, packmd);
 732
 733         rc = OBP(exp->exp_obd, packmd)(exp, disk_tgt, mem_src);
 734         RETURN(rc);
 735 }
 736
 737 static inline int obd_size_diskmd(struct obd_export *exp,
 738                                   struct lov_stripe_md *mem_src)
 739 {
 740         return obd_packmd(exp, NULL, mem_src);
 741 }
 742
 743 /* helper functions */
 744 static inline int obd_alloc_diskmd(struct obd_export *exp,
 745                                    struct lov_mds_md **disk_tgt)
 746 {
 747         LASSERT(disk_tgt);
 748         LASSERT(*disk_tgt == NULL);
 749         return obd_packmd(exp, disk_tgt, NULL);
 750 }
 751
 752 static inline int obd_free_diskmd(struct obd_export *exp,
 753                                   struct lov_mds_md **disk_tgt)
 754 {
 755         LASSERT(disk_tgt);
 756         LASSERT(*disk_tgt);
 757         return obd_packmd(exp, disk_tgt, NULL);
 758 }
 759
 760 /* Unpack an MD struct from disk to in-memory format.
 761  * Returns +ve size of unpacked MD (0 for free), or -ve error.
 762  *
 763  * If @mem_tgt == NULL, MD size is returned (max size if @disk_src == NULL).
 764  * If @*mem_tgt != NULL and @disk_src == NULL, @*mem_tgt will be freed.
 765  * If @*mem_tgt == NULL, it will be allocated
 766  */
 767 static inline int obd_unpackmd(struct obd_export *exp,
 768                                struct lov_stripe_md **mem_tgt,
 769                                struct lov_mds_md *disk_src,
 770                                int disk_len)
 771 {
 772         int rc;
 773         ENTRY;
 774
 775         EXP_CHECK_DT_OP(exp, unpackmd);
 776         EXP_COUNTER_INCREMENT(exp, unpackmd);
 777
 778         rc = OBP(exp->exp_obd, unpackmd)(exp, mem_tgt, disk_src, disk_len);
 779         RETURN(rc);
 780 }
 781
 782 /* helper functions */
 783 static inline int obd_alloc_memmd(struct obd_export *exp,
 784                                   struct lov_stripe_md **mem_tgt)
 785 {
 786         LASSERT(mem_tgt);
 787         LASSERT(*mem_tgt == NULL);
 788         return obd_unpackmd(exp, mem_tgt, NULL, 0);
 789 }
 790
 791 static inline int obd_free_memmd(struct obd_export *exp,
 792                                  struct lov_stripe_md **mem_tgt)
 793 {
 794         int rc;
 795
 796         LASSERT(mem_tgt);
 797         LASSERT(*mem_tgt);
 798         rc = obd_unpackmd(exp, mem_tgt, NULL, 0);
 799         *mem_tgt = NULL;
 800         return rc;
 801 }
 802
 803 static inline int obd_precreate(struct obd_export *exp)
 804 {
 805         int rc;
 806         ENTRY;
 807
 808         EXP_CHECK_DT_OP(exp, precreate);
 809         OBD_COUNTER_INCREMENT(exp->exp_obd, precreate);
 810
 811         rc = OBP(exp->exp_obd, precreate)(exp);
 812         RETURN(rc);
 813 }
 814
 815 static inline int obd_create_async(struct obd_export *exp,
 816                                    struct obd_info *oinfo,
 817                                    struct lov_stripe_md **ea,
 818                                    struct obd_trans_info *oti)
 819 {
 820         int rc;
 821         ENTRY;
 822
 823         EXP_CHECK_DT_OP(exp, create_async);
 824         EXP_COUNTER_INCREMENT(exp, create_async);
 825
 826         rc = OBP(exp->exp_obd, create_async)(exp, oinfo, ea, oti);
 827         RETURN(rc);
 828 }
 829
 830 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 831                              struct obdo *obdo, struct lov_stripe_md **ea,
 832                              struct obd_trans_info *oti)
 833 {
 834         int rc;
 835         ENTRY;
 836
 837         EXP_CHECK_DT_OP(exp, create);
 838         EXP_COUNTER_INCREMENT(exp, create);
 839
 840         rc = OBP(exp->exp_obd, create)(env, exp, obdo, ea, oti);
 841         RETURN(rc);
 842 }
 843
 844 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 845                               struct obdo *obdo, struct lov_stripe_md *ea,
 846                               struct obd_trans_info *oti,
 847                               struct obd_export *md_exp, void *capa)
 848 {
 849         int rc;
 850         ENTRY;
 851
 852         EXP_CHECK_DT_OP(exp, destroy);
 853         EXP_COUNTER_INCREMENT(exp, destroy);
 854
 855         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo, ea, oti, md_exp, capa);
 856         RETURN(rc);
 857 }
 858
 859 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 860                               struct obd_info *oinfo)
 861 {
 862         int rc;
 863         ENTRY;
 864
 865         EXP_CHECK_DT_OP(exp, getattr);
 866         EXP_COUNTER_INCREMENT(exp, getattr);
 867
 868         rc = OBP(exp->exp_obd, getattr)(env, exp, oinfo);
 869         RETURN(rc);
 870 }
 871
 872 static inline int obd_getattr_async(struct obd_export *exp,
 873                                     struct obd_info *oinfo,
 874                                     struct ptlrpc_request_set *set)
 875 {
 876         int rc;
 877         ENTRY;
 878
 879         EXP_CHECK_DT_OP(exp, getattr_async);
 880         EXP_COUNTER_INCREMENT(exp, getattr_async);
 881
 882         rc = OBP(exp->exp_obd, getattr_async)(exp, oinfo, set);
 883         RETURN(rc);
 884 }
 885
 886 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 887                               struct obd_info *oinfo,
 888                               struct obd_trans_info *oti)
 889 {
 890         int rc;
 891         ENTRY;
 892
 893         EXP_CHECK_DT_OP(exp, setattr);
 894         EXP_COUNTER_INCREMENT(exp, setattr);
 895
 896         rc = OBP(exp->exp_obd, setattr)(env, exp, oinfo, oti);
 897         RETURN(rc);
 898 }
 899
 900 /* This performs all the requests set init/wait/destroy actions. */
 901 static inline int obd_setattr_rqset(struct obd_export *exp,
 902                                     struct obd_info *oinfo,
 903                                     struct obd_trans_info *oti)
 904 {
 905         struct ptlrpc_request_set *set = NULL;
 906         int rc;
 907         ENTRY;
 908
 909         EXP_CHECK_DT_OP(exp, setattr_async);
 910         EXP_COUNTER_INCREMENT(exp, setattr_async);
 911
 912         set =  ptlrpc_prep_set();
 913         if (set == NULL)
 914                 RETURN(-ENOMEM);
 915
 916         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 917         if (rc == 0)
 918                 rc = ptlrpc_set_wait(set);
 919         ptlrpc_set_destroy(set);
 920         RETURN(rc);
 921 }
 922
 923 /* This adds all the requests into @set if @set != NULL, otherwise
 924    all requests are sent asynchronously without waiting for response. */
 925 static inline int obd_setattr_async(struct obd_export *exp,
 926                                     struct obd_info *oinfo,
 927                                     struct obd_trans_info *oti,
 928                                     struct ptlrpc_request_set *set)
 929 {
 930         int rc;
 931         ENTRY;
 932
 933         EXP_CHECK_DT_OP(exp, setattr_async);
 934         EXP_COUNTER_INCREMENT(exp, setattr_async);
 935
 936         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 937         RETURN(rc);
 938 }
 939
 940 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 941                                int priority)
 942 {
 943         struct obd_device *obd = imp->imp_obd;
 944         int rc;
 945         ENTRY;
 946
 947         OBD_CHECK_DEV_ACTIVE(obd);
 948         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 949         OBD_COUNTER_INCREMENT(obd, add_conn);
 950
 951         rc = OBP(obd, add_conn)(imp, uuid, priority);
 952         RETURN(rc);
 953 }
 954
 955 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 956 {
 957         struct obd_device *obd = imp->imp_obd;
 958         int rc;
 959         ENTRY;
 960
 961         OBD_CHECK_DEV_ACTIVE(obd);
 962         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 963         OBD_COUNTER_INCREMENT(obd, del_conn);
 964
 965         rc = OBP(obd, del_conn)(imp, uuid);
 966         RETURN(rc);
 967 }
 968
 969 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 970 {
 971         struct obd_uuid *uuid;
 972         ENTRY;
 973
 974         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 975         EXP_COUNTER_INCREMENT(exp, get_uuid);
 976
 977         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 978         RETURN(uuid);
 979 }
 980
 981 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 982  * @param exp New export handle
 983  * @param d Connect data, supported flags are set, flags also understood
 984  *    by obd are returned.
 985  */
 986 static inline int obd_connect(const struct lu_env *env,
 987                               struct obd_export **exp,struct obd_device *obd,
 988                               struct obd_uuid *cluuid,
 989                               struct obd_connect_data *data,
 990                               void *localdata)
 991 {
 992         int rc;
 993         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 994                                                    * check */
 995         ENTRY;
 996
 997         OBD_CHECK_DEV_ACTIVE(obd);
 998         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
 999         OBD_COUNTER_INCREMENT(obd, connect);
1000
1001         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
1002         /* check that only subset is granted */
1003         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
1004                                     data->ocd_connect_flags));
1005         RETURN(rc);
1006 }
1007
1008 static inline int obd_reconnect(const struct lu_env *env,
1009                                 struct obd_export *exp,
1010                                 struct obd_device *obd,
1011                                 struct obd_uuid *cluuid,
1012                                 struct obd_connect_data *d,
1013                                 void *localdata)
1014 {
1015         int rc;
1016         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
1017                                                    * check */
1018
1019         ENTRY;
1020
1021         OBD_CHECK_DEV_ACTIVE(obd);
1022         OBD_CHECK_DT_OP(obd, reconnect, 0);
1023         OBD_COUNTER_INCREMENT(obd, reconnect);
1024
1025         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
1026         /* check that only subset is granted */
1027         LASSERT(ergo(d != NULL,
1028                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
1029         RETURN(rc);
1030 }
1031
1032 static inline int obd_disconnect(struct obd_export *exp)
1033 {
1034         int rc;
1035         ENTRY;
1036
1037         EXP_CHECK_DT_OP(exp, disconnect);
1038         EXP_COUNTER_INCREMENT(exp, disconnect);
1039
1040         rc = OBP(exp->exp_obd, disconnect)(exp);
1041         RETURN(rc);
1042 }
1043
1044 static inline int obd_fid_init(struct obd_export *exp, enum lu_cli_type type)
1045 {
1046         int rc;
1047         ENTRY;
1048
1049         OBD_CHECK_DT_OP(exp->exp_obd, fid_init, 0);
1050         EXP_COUNTER_INCREMENT(exp, fid_init);
1051
1052         rc = OBP(exp->exp_obd, fid_init)(exp, type);
1053         RETURN(rc);
1054 }
1055
1056 static inline int obd_fid_fini(struct obd_export *exp)
1057 {
1058         int rc;
1059         ENTRY;
1060
1061         OBD_CHECK_DT_OP(exp->exp_obd, fid_fini, 0);
1062         EXP_COUNTER_INCREMENT(exp, fid_fini);
1063
1064         rc = OBP(exp->exp_obd, fid_fini)(exp);
1065         RETURN(rc);
1066 }
1067
1068 static inline int obd_fid_alloc(struct obd_export *exp,
1069                                 struct lu_fid *fid,
1070                                 struct md_op_data *op_data)
1071 {
1072         int rc;
1073         ENTRY;
1074
1075         EXP_CHECK_DT_OP(exp, fid_alloc);
1076         EXP_COUNTER_INCREMENT(exp, fid_alloc);
1077
1078         rc = OBP(exp->exp_obd, fid_alloc)(exp, fid, op_data);
1079         RETURN(rc);
1080 }
1081
1082 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
1083 {
1084         int rc;
1085         ENTRY;
1086
1087         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
1088         EXP_COUNTER_INCREMENT(exp, ping);
1089
1090         rc = OBP(exp->exp_obd, ping)(env, exp);
1091         RETURN(rc);
1092 }
1093
1094 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
1095 {
1096         int rc;
1097         ENTRY;
1098
1099         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
1100         OBD_COUNTER_INCREMENT(obd, pool_new);
1101
1102         rc = OBP(obd, pool_new)(obd, poolname);
1103         RETURN(rc);
1104 }
1105
1106 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
1107 {
1108         int rc;
1109         ENTRY;
1110
1111         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
1112         OBD_COUNTER_INCREMENT(obd, pool_del);
1113
1114         rc = OBP(obd, pool_del)(obd, poolname);
1115         RETURN(rc);
1116 }
1117
1118 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
1119 {
1120         int rc;
1121         ENTRY;
1122
1123         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
1124         OBD_COUNTER_INCREMENT(obd, pool_add);
1125
1126         rc = OBP(obd, pool_add)(obd, poolname, ostname);
1127         RETURN(rc);
1128 }
1129
1130 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
1131 {
1132         int rc;
1133         ENTRY;
1134
1135         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
1136         OBD_COUNTER_INCREMENT(obd, pool_rem);
1137
1138         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
1139         RETURN(rc);
1140 }
1141
1142 static inline void obd_getref(struct obd_device *obd)
1143 {
1144         ENTRY;
1145         if (OBT(obd) && OBP(obd, getref)) {
1146                 OBD_COUNTER_INCREMENT(obd, getref);
1147                 OBP(obd, getref)(obd);
1148         }
1149         EXIT;
1150 }
1151
1152 static inline void obd_putref(struct obd_device *obd)
1153 {
1154         ENTRY;
1155         if (OBT(obd) && OBP(obd, putref)) {
1156                 OBD_COUNTER_INCREMENT(obd, putref);
1157                 OBP(obd, putref)(obd);
1158         }
1159         EXIT;
1160 }
1161
1162 static inline int obd_init_export(struct obd_export *exp)
1163 {
1164         int rc = 0;
1165
1166         ENTRY;
1167         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1168             OBP((exp)->exp_obd, init_export))
1169                 rc = OBP(exp->exp_obd, init_export)(exp);
1170         RETURN(rc);
1171 }
1172
1173 static inline int obd_destroy_export(struct obd_export *exp)
1174 {
1175         ENTRY;
1176         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1177             OBP((exp)->exp_obd, destroy_export))
1178                 OBP(exp->exp_obd, destroy_export)(exp);
1179         RETURN(0);
1180 }
1181
1182 static inline int obd_extent_calc(struct obd_export *exp,
1183                                   struct lov_stripe_md *md,
1184                                   int cmd, obd_off *offset)
1185 {
1186         int rc;
1187         ENTRY;
1188         EXP_CHECK_DT_OP(exp, extent_calc);
1189         rc = OBP(exp->exp_obd, extent_calc)(exp, md, cmd, offset);
1190         RETURN(rc);
1191 }
1192
1193 static inline struct dentry *
1194 obd_lvfs_fid2dentry(struct obd_export *exp, __u64 id_ino, __u32 gen, __u64 gr)
1195 {
1196         LASSERT(exp->exp_obd);
1197
1198         return lvfs_fid2dentry(&exp->exp_obd->obd_lvfs_ctxt, id_ino, gen, gr,
1199                                exp->exp_obd);
1200 }
1201
1202 static inline int
1203 obd_lvfs_open_llog(struct obd_export *exp, __u64 id_ino, struct dentry *dentry)
1204 {
1205         LASSERT(exp->exp_obd);
1206         CERROR("FIXME what's the story here?  This needs to be an obd fn?\n");
1207 #if 0
1208         return lvfs_open_llog(&exp->exp_obd->obd_lvfs_ctxt, id_ino,
1209                               dentry, exp->exp_obd);
1210 #endif
1211         return 0;
1212 }
1213
1214 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1215  * If the cache is older than @max_age we will get a new value from the
1216  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1217 static inline int obd_statfs_async(struct obd_export *exp,
1218                                    struct obd_info *oinfo,
1219                                    __u64 max_age,
1220                                    struct ptlrpc_request_set *rqset)
1221 {
1222         int rc = 0;
1223         struct obd_device *obd;
1224         ENTRY;
1225
1226         if (exp == NULL || exp->exp_obd == NULL)
1227                 RETURN(-EINVAL);
1228
1229         obd = exp->exp_obd;
1230         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1231         OBD_COUNTER_INCREMENT(obd, statfs);
1232
1233         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
1234                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1235         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1236                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1237         } else {
1238                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
1239                        " objects "LPU64"/"LPU64"\n",
1240                        obd->obd_name, &obd->obd_osfs,
1241                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1242                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1243                 spin_lock(&obd->obd_osfs_lock);
1244                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1245                 spin_unlock(&obd->obd_osfs_lock);
1246                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1247                 if (oinfo->oi_cb_up)
1248                         oinfo->oi_cb_up(oinfo, 0);
1249         }
1250         RETURN(rc);
1251 }
1252
1253 static inline int obd_statfs_rqset(struct obd_export *exp,
1254                                    struct obd_statfs *osfs, __u64 max_age,
1255                                    __u32 flags)
1256 {
1257         struct ptlrpc_request_set *set = NULL;
1258         struct obd_info oinfo = { { { 0 } } };
1259         int rc = 0;
1260         ENTRY;
1261
1262         set =  ptlrpc_prep_set();
1263         if (set == NULL)
1264                 RETURN(-ENOMEM);
1265
1266         oinfo.oi_osfs = osfs;
1267         oinfo.oi_flags = flags;
1268         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1269         if (rc == 0)
1270                 rc = ptlrpc_set_wait(set);
1271         ptlrpc_set_destroy(set);
1272         RETURN(rc);
1273 }
1274
1275 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1276  * If the cache is older than @max_age we will get a new value from the
1277  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1278 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1279                              struct obd_statfs *osfs, __u64 max_age,
1280                              __u32 flags)
1281 {
1282         int rc = 0;
1283         struct obd_device *obd = exp->exp_obd;
1284         ENTRY;
1285
1286         if (obd == NULL)
1287                 RETURN(-EINVAL);
1288
1289         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1290         OBD_COUNTER_INCREMENT(obd, statfs);
1291
1292         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
1293                obd->obd_osfs_age, max_age);
1294         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1295                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1296                 if (rc == 0) {
1297                         spin_lock(&obd->obd_osfs_lock);
1298                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1299                         obd->obd_osfs_age = cfs_time_current_64();
1300                         spin_unlock(&obd->obd_osfs_lock);
1301                 }
1302         } else {
1303                 CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
1304                        " objects "LPU64"/"LPU64"\n",
1305                        obd->obd_name, &obd->obd_osfs,
1306                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1307                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1308                 spin_lock(&obd->obd_osfs_lock);
1309                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1310                 spin_unlock(&obd->obd_osfs_lock);
1311         }
1312         RETURN(rc);
1313 }
1314
1315 static inline int obd_sync_rqset(struct obd_export *exp, struct obd_info *oinfo,
1316                                  obd_size start, obd_size end)
1317 {
1318         struct ptlrpc_request_set *set = NULL;
1319         int rc;
1320         ENTRY;
1321
1322         OBD_CHECK_DT_OP(exp->exp_obd, sync, -EOPNOTSUPP);
1323         EXP_COUNTER_INCREMENT(exp, sync);
1324
1325         set =  ptlrpc_prep_set();
1326         if (set == NULL)
1327                 RETURN(-ENOMEM);
1328
1329         rc = OBP(exp->exp_obd, sync)(NULL, exp, oinfo, start, end, set);
1330         if (rc == 0)
1331                 rc = ptlrpc_set_wait(set);
1332         ptlrpc_set_destroy(set);
1333         RETURN(rc);
1334 }
1335
1336 static inline int obd_sync(const struct lu_env *env, struct obd_export *exp,
1337                            struct obd_info *oinfo, obd_size start, obd_size end,
1338                            struct ptlrpc_request_set *set)
1339 {
1340         int rc;
1341         ENTRY;
1342
1343         OBD_CHECK_DT_OP(exp->exp_obd, sync, -EOPNOTSUPP);
1344         EXP_COUNTER_INCREMENT(exp, sync);
1345
1346         rc = OBP(exp->exp_obd, sync)(env, exp, oinfo, start, end, set);
1347         RETURN(rc);
1348 }
1349
1350 static inline int obd_punch_rqset(struct obd_export *exp,
1351                                   struct obd_info *oinfo,
1352                                   struct obd_trans_info *oti)
1353 {
1354         struct ptlrpc_request_set *set = NULL;
1355         int rc;
1356         ENTRY;
1357
1358         EXP_CHECK_DT_OP(exp, punch);
1359         EXP_COUNTER_INCREMENT(exp, punch);
1360
1361         set =  ptlrpc_prep_set();
1362         if (set == NULL)
1363                 RETURN(-ENOMEM);
1364
1365         rc = OBP(exp->exp_obd, punch)(NULL, exp, oinfo, oti, set);
1366         if (rc == 0)
1367                 rc = ptlrpc_set_wait(set);
1368         ptlrpc_set_destroy(set);
1369         RETURN(rc);
1370 }
1371
1372 static inline int obd_punch(const struct lu_env *env, struct obd_export *exp,
1373                             struct obd_info *oinfo, struct obd_trans_info *oti,
1374                             struct ptlrpc_request_set *rqset)
1375 {
1376         int rc;
1377         ENTRY;
1378
1379         EXP_CHECK_DT_OP(exp, punch);
1380         EXP_COUNTER_INCREMENT(exp, punch);
1381
1382         rc = OBP(exp->exp_obd, punch)(env, exp, oinfo, oti, rqset);
1383         RETURN(rc);
1384 }
1385
1386 static inline int obd_brw(int cmd, struct obd_export *exp,
1387                           struct obd_info *oinfo, obd_count oa_bufs,
1388                           struct brw_page *pg, struct obd_trans_info *oti)
1389 {
1390         int rc;
1391         ENTRY;
1392
1393         EXP_CHECK_DT_OP(exp, brw);
1394         EXP_COUNTER_INCREMENT(exp, brw);
1395
1396         if (!(cmd & (OBD_BRW_RWMASK | OBD_BRW_CHECK))) {
1397                 CERROR("obd_brw: cmd must be OBD_BRW_READ, OBD_BRW_WRITE, "
1398                        "or OBD_BRW_CHECK\n");
1399                 LBUG();
1400         }
1401
1402         rc = OBP(exp->exp_obd, brw)(cmd, exp, oinfo, oa_bufs, pg, oti);
1403         RETURN(rc);
1404 }
1405
1406 static inline int obd_preprw(const struct lu_env *env, int cmd,
1407                              struct obd_export *exp, struct obdo *oa,
1408                              int objcount, struct obd_ioobj *obj,
1409                              struct niobuf_remote *remote, int *pages,
1410                              struct niobuf_local *local,
1411                              struct obd_trans_info *oti,
1412                              struct lustre_capa *capa)
1413 {
1414         int rc;
1415         ENTRY;
1416
1417         EXP_CHECK_DT_OP(exp, preprw);
1418         EXP_COUNTER_INCREMENT(exp, preprw);
1419
1420         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1421                                        pages, local, oti, capa);
1422         RETURN(rc);
1423 }
1424
1425 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1426                                struct obd_export *exp, struct obdo *oa,
1427                                int objcount, struct obd_ioobj *obj,
1428                                struct niobuf_remote *rnb, int pages,
1429                                struct niobuf_local *local,
1430                                struct obd_trans_info *oti, int rc)
1431 {
1432         ENTRY;
1433
1434         EXP_CHECK_DT_OP(exp, commitrw);
1435         EXP_COUNTER_INCREMENT(exp, commitrw);
1436
1437         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1438                                          rnb, pages, local, oti, rc);
1439         RETURN(rc);
1440 }
1441
1442 static inline int obd_merge_lvb(struct obd_export *exp,
1443                                 struct lov_stripe_md *lsm,
1444                                 struct ost_lvb *lvb, int kms_only)
1445 {
1446         int rc;
1447         ENTRY;
1448
1449         EXP_CHECK_DT_OP(exp, merge_lvb);
1450         EXP_COUNTER_INCREMENT(exp, merge_lvb);
1451
1452         rc = OBP(exp->exp_obd, merge_lvb)(exp, lsm, lvb, kms_only);
1453         RETURN(rc);
1454 }
1455
1456 static inline int obd_adjust_kms(struct obd_export *exp,
1457                                  struct lov_stripe_md *lsm, obd_off size,
1458                                  int shrink)
1459 {
1460         int rc;
1461         ENTRY;
1462
1463         EXP_CHECK_DT_OP(exp, adjust_kms);
1464         EXP_COUNTER_INCREMENT(exp, adjust_kms);
1465
1466         rc = OBP(exp->exp_obd, adjust_kms)(exp, lsm, size, shrink);
1467         RETURN(rc);
1468 }
1469
1470 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1471                                 int len, void *karg, void *uarg)
1472 {
1473         int rc;
1474         ENTRY;
1475
1476         EXP_CHECK_DT_OP(exp, iocontrol);
1477         EXP_COUNTER_INCREMENT(exp, iocontrol);
1478
1479         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1480         RETURN(rc);
1481 }
1482
1483 static inline int obd_enqueue_rqset(struct obd_export *exp,
1484                                     struct obd_info *oinfo,
1485                                     struct ldlm_enqueue_info *einfo)
1486 {
1487         struct ptlrpc_request_set *set = NULL;
1488         int rc;
1489         ENTRY;
1490
1491         EXP_CHECK_DT_OP(exp, enqueue);
1492         EXP_COUNTER_INCREMENT(exp, enqueue);
1493
1494         set =  ptlrpc_prep_set();
1495         if (set == NULL)
1496                 RETURN(-ENOMEM);
1497
1498         rc = OBP(exp->exp_obd, enqueue)(exp, oinfo, einfo, set);
1499         if (rc == 0)
1500                 rc = ptlrpc_set_wait(set);
1501         ptlrpc_set_destroy(set);
1502         RETURN(rc);
1503 }
1504
1505 static inline int obd_enqueue(struct obd_export *exp,
1506                               struct obd_info *oinfo,
1507                               struct ldlm_enqueue_info *einfo,
1508                               struct ptlrpc_request_set *set)
1509 {
1510         int rc;
1511         ENTRY;
1512
1513         EXP_CHECK_DT_OP(exp, enqueue);
1514         EXP_COUNTER_INCREMENT(exp, enqueue);
1515
1516         rc = OBP(exp->exp_obd, enqueue)(exp, oinfo, einfo, set);
1517         RETURN(rc);
1518 }
1519
1520 static inline int obd_change_cbdata(struct obd_export *exp,
1521                                     struct lov_stripe_md *lsm,
1522                                     ldlm_iterator_t it, void *data)
1523 {
1524         int rc;
1525         ENTRY;
1526
1527         EXP_CHECK_DT_OP(exp, change_cbdata);
1528         EXP_COUNTER_INCREMENT(exp, change_cbdata);
1529
1530         rc = OBP(exp->exp_obd, change_cbdata)(exp, lsm, it, data);
1531         RETURN(rc);
1532 }
1533
1534 static inline int obd_find_cbdata(struct obd_export *exp,
1535                                   struct lov_stripe_md *lsm,
1536                                   ldlm_iterator_t it, void *data)
1537 {
1538         int rc;
1539         ENTRY;
1540
1541         EXP_CHECK_DT_OP(exp, find_cbdata);
1542         EXP_COUNTER_INCREMENT(exp, find_cbdata);
1543
1544         rc = OBP(exp->exp_obd, find_cbdata)(exp, lsm, it, data);
1545         RETURN(rc);
1546 }
1547
1548 static inline int obd_cancel(struct obd_export *exp,
1549                              struct lov_stripe_md *ea, __u32 mode,
1550                              struct lustre_handle *lockh)
1551 {
1552         int rc;
1553         ENTRY;
1554
1555         EXP_CHECK_DT_OP(exp, cancel);
1556         EXP_COUNTER_INCREMENT(exp, cancel);
1557
1558         rc = OBP(exp->exp_obd, cancel)(exp, ea, mode, lockh);
1559         RETURN(rc);
1560 }
1561
1562 static inline int obd_cancel_unused(struct obd_export *exp,
1563                                     struct lov_stripe_md *ea,
1564                                     ldlm_cancel_flags_t flags,
1565                                     void *opaque)
1566 {
1567         int rc;
1568         ENTRY;
1569
1570         EXP_CHECK_DT_OP(exp, cancel_unused);
1571         EXP_COUNTER_INCREMENT(exp, cancel_unused);
1572
1573         rc = OBP(exp->exp_obd, cancel_unused)(exp, ea, flags, opaque);
1574         RETURN(rc);
1575 }
1576
1577 static inline int obd_pin(struct obd_export *exp, const struct lu_fid *fid,
1578                           struct obd_capa *oc, struct obd_client_handle *handle,
1579                           int flag)
1580 {
1581         int rc;
1582         ENTRY;
1583
1584         EXP_CHECK_DT_OP(exp, pin);
1585         EXP_COUNTER_INCREMENT(exp, pin);
1586
1587         rc = OBP(exp->exp_obd, pin)(exp, fid, oc, handle, flag);
1588         RETURN(rc);
1589 }
1590
1591 static inline int obd_unpin(struct obd_export *exp,
1592                             struct obd_client_handle *handle, int flag)
1593 {
1594         int rc;
1595         ENTRY;
1596
1597         EXP_CHECK_DT_OP(exp, unpin);
1598         EXP_COUNTER_INCREMENT(exp, unpin);
1599
1600         rc = OBP(exp->exp_obd, unpin)(exp, handle, flag);
1601         RETURN(rc);
1602 }
1603
1604
1605 static inline void obd_import_event(struct obd_device *obd,
1606                                     struct obd_import *imp,
1607                                     enum obd_import_event event)
1608 {
1609         ENTRY;
1610         if (!obd) {
1611                 CERROR("NULL device\n");
1612                 EXIT;
1613                 return;
1614         }
1615         if (obd->obd_set_up && OBP(obd, import_event)) {
1616                 OBD_COUNTER_INCREMENT(obd, import_event);
1617                 OBP(obd, import_event)(obd, imp, event);
1618         }
1619         EXIT;
1620 }
1621
1622 static inline int obd_llog_connect(struct obd_export *exp,
1623                                    struct llogd_conn_body *body)
1624 {
1625         int rc;
1626         ENTRY;
1627
1628         OBD_CHECK_DT_OP(exp->exp_obd, llog_connect, 0);
1629         EXP_COUNTER_INCREMENT(exp, llog_connect);
1630
1631         rc = OBP(exp->exp_obd, llog_connect)(exp, body);
1632         RETURN(rc);
1633 }
1634
1635
1636 static inline int obd_notify(struct obd_device *obd,
1637                              struct obd_device *watched,
1638                              enum obd_notify_event ev,
1639                              void *data)
1640 {
1641         int rc;
1642         ENTRY;
1643         OBD_CHECK_DEV(obd);
1644
1645         /* the check for async_recov is a complete hack - I'm hereby
1646            overloading the meaning to also mean "this was called from
1647            mds_postsetup".  I know that my mds is able to handle notifies
1648            by this point, and it needs to get them to execute mds_postrecov. */
1649         if (!obd->obd_set_up && !obd->obd_async_recov) {
1650                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1651                 RETURN(-EINVAL);
1652         }
1653
1654         if (!OBP(obd, notify)) {
1655                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1656                 RETURN(-ENOSYS);
1657         }
1658
1659         OBD_COUNTER_INCREMENT(obd, notify);
1660         rc = OBP(obd, notify)(obd, watched, ev, data);
1661         RETURN(rc);
1662 }
1663
1664 static inline int obd_notify_observer(struct obd_device *observer,
1665                                       struct obd_device *observed,
1666                                       enum obd_notify_event ev,
1667                                       void *data)
1668 {
1669         int rc1;
1670         int rc2;
1671
1672         struct obd_notify_upcall *onu;
1673
1674         if (observer->obd_observer)
1675                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1676         else
1677                 rc1 = 0;
1678         /*
1679          * Also, call non-obd listener, if any
1680          */
1681         onu = &observer->obd_upcall;
1682         if (onu->onu_upcall != NULL)
1683                 rc2 = onu->onu_upcall(observer, observed, ev,
1684                                       onu->onu_owner, NULL);
1685         else
1686                 rc2 = 0;
1687
1688         return rc1 ? rc1 : rc2;
1689 }
1690
1691 static inline int obd_quotacheck(struct obd_export *exp,
1692                                  struct obd_quotactl *oqctl)
1693 {
1694         int rc;
1695         ENTRY;
1696
1697         EXP_CHECK_DT_OP(exp, quotacheck);
1698         EXP_COUNTER_INCREMENT(exp, quotacheck);
1699
1700         rc = OBP(exp->exp_obd, quotacheck)(exp->exp_obd, exp, oqctl);
1701         RETURN(rc);
1702 }
1703
1704 static inline int obd_quotactl(struct obd_export *exp,
1705                                struct obd_quotactl *oqctl)
1706 {
1707         int rc;
1708         ENTRY;
1709
1710         EXP_CHECK_DT_OP(exp, quotactl);
1711         EXP_COUNTER_INCREMENT(exp, quotactl);
1712
1713         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1714         RETURN(rc);
1715 }
1716
1717 static inline int obd_health_check(const struct lu_env *env,
1718                                    struct obd_device *obd)
1719 {
1720         /* returns: 0 on healthy
1721          *         >0 on unhealthy + reason code/flag
1722          *            however the only suppored reason == 1 right now
1723          *            We'll need to define some better reasons
1724          *            or flags in the future.
1725          *         <0 on error
1726          */
1727         int rc;
1728         ENTRY;
1729
1730         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1731         if (obd == NULL || !OBT(obd)) {
1732                 CERROR("cleaned up obd\n");
1733                 RETURN(-EOPNOTSUPP);
1734         }
1735         if (!obd->obd_set_up || obd->obd_stopping)
1736                 RETURN(0);
1737         if (!OBP(obd, health_check))
1738                 RETURN(0);
1739
1740         rc = OBP(obd, health_check)(env, obd);
1741         RETURN(rc);
1742 }
1743
1744 static inline int obd_register_observer(struct obd_device *obd,
1745                                         struct obd_device *observer)
1746 {
1747         ENTRY;
1748         OBD_CHECK_DEV(obd);
1749         down_write(&obd->obd_observer_link_sem);
1750         if (obd->obd_observer && observer) {
1751                 up_write(&obd->obd_observer_link_sem);
1752                 RETURN(-EALREADY);
1753         }
1754         obd->obd_observer = observer;
1755         up_write(&obd->obd_observer_link_sem);
1756         RETURN(0);
1757 }
1758
1759 static inline int obd_pin_observer(struct obd_device *obd,
1760                                    struct obd_device **observer)
1761 {
1762         ENTRY;
1763         down_read(&obd->obd_observer_link_sem);
1764         if (!obd->obd_observer) {
1765                 *observer = NULL;
1766                 up_read(&obd->obd_observer_link_sem);
1767                 RETURN(-ENOENT);
1768         }
1769         *observer = obd->obd_observer;
1770         RETURN(0);
1771 }
1772
1773 static inline int obd_unpin_observer(struct obd_device *obd)
1774 {
1775         ENTRY;
1776         up_read(&obd->obd_observer_link_sem);
1777         RETURN(0);
1778 }
1779
1780 #if 0
1781 static inline int obd_register_page_removal_cb(struct obd_export *exp,
1782                                                obd_page_removal_cb_t cb,
1783                                                obd_pin_extent_cb pin_cb)
1784 {
1785         int rc;
1786         ENTRY;
1787
1788         OBD_CHECK_DT_OP(exp->exp_obd, register_page_removal_cb, 0);
1789         OBD_COUNTER_INCREMENT(exp->exp_obd, register_page_removal_cb);
1790
1791         rc = OBP(exp->exp_obd, register_page_removal_cb)(exp, cb, pin_cb);
1792         RETURN(rc);
1793 }
1794
1795 static inline int obd_unregister_page_removal_cb(struct obd_export *exp,
1796                                                  obd_page_removal_cb_t cb)
1797 {
1798         int rc;
1799         ENTRY;
1800
1801         OBD_CHECK_DT_OP(exp->exp_obd, unregister_page_removal_cb, 0);
1802         OBD_COUNTER_INCREMENT(exp->exp_obd, unregister_page_removal_cb);
1803
1804         rc = OBP(exp->exp_obd, unregister_page_removal_cb)(exp, cb);
1805         RETURN(rc);
1806 }
1807
1808 static inline int obd_register_lock_cancel_cb(struct obd_export *exp,
1809                                               obd_lock_cancel_cb cb)
1810 {
1811         int rc;
1812         ENTRY;
1813
1814         OBD_CHECK_DT_OP(exp->exp_obd, register_lock_cancel_cb, 0);
1815         OBD_COUNTER_INCREMENT(exp->exp_obd, register_lock_cancel_cb);
1816
1817         rc = OBP(exp->exp_obd, register_lock_cancel_cb)(exp, cb);
1818         RETURN(rc);
1819 }
1820
1821 static inline int obd_unregister_lock_cancel_cb(struct obd_export *exp,
1822                                                  obd_lock_cancel_cb cb)
1823 {
1824         int rc;
1825         ENTRY;
1826
1827         OBD_CHECK_DT_OP(exp->exp_obd, unregister_lock_cancel_cb, 0);
1828         OBD_COUNTER_INCREMENT(exp->exp_obd, unregister_lock_cancel_cb);
1829
1830         rc = OBP(exp->exp_obd, unregister_lock_cancel_cb)(exp, cb);
1831         RETURN(rc);
1832 }
1833 #endif
1834
1835 /* metadata helpers */
1836 static inline int md_getstatus(struct obd_export *exp,
1837                                struct lu_fid *fid, struct obd_capa **pc)
1838 {
1839         int rc;
1840         ENTRY;
1841
1842         EXP_CHECK_MD_OP(exp, getstatus);
1843         EXP_MD_COUNTER_INCREMENT(exp, getstatus);
1844         rc = MDP(exp->exp_obd, getstatus)(exp, fid, pc);
1845         RETURN(rc);
1846 }
1847
1848 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1849                              struct ptlrpc_request **request)
1850 {
1851         int rc;
1852         ENTRY;
1853         EXP_CHECK_MD_OP(exp, getattr);
1854         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1855         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1856         RETURN(rc);
1857 }
1858
1859 static inline int md_change_cbdata(struct obd_export *exp,
1860                                    const struct lu_fid *fid,
1861                                    ldlm_iterator_t it, void *data)
1862 {
1863         int rc;
1864         ENTRY;
1865         EXP_CHECK_MD_OP(exp, change_cbdata);
1866         EXP_MD_COUNTER_INCREMENT(exp, change_cbdata);
1867         rc = MDP(exp->exp_obd, change_cbdata)(exp, fid, it, data);
1868         RETURN(rc);
1869 }
1870
1871 static inline int md_find_cbdata(struct obd_export *exp,
1872                                  const struct lu_fid *fid,
1873                                  ldlm_iterator_t it, void *data)
1874 {
1875         int rc;
1876         ENTRY;
1877         EXP_CHECK_MD_OP(exp, find_cbdata);
1878         EXP_MD_COUNTER_INCREMENT(exp, find_cbdata);
1879         rc = MDP(exp->exp_obd, find_cbdata)(exp, fid, it, data);
1880         RETURN(rc);
1881 }
1882
1883 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1884                            struct md_open_data *mod,
1885                            struct ptlrpc_request **request)
1886 {
1887         int rc;
1888         ENTRY;
1889         EXP_CHECK_MD_OP(exp, close);
1890         EXP_MD_COUNTER_INCREMENT(exp, close);
1891         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1892         RETURN(rc);
1893 }
1894
1895 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1896                             const void *data, int datalen, int mode, __u32 uid,
1897                             __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1898                             struct ptlrpc_request **request)
1899 {
1900         int rc;
1901         ENTRY;
1902         EXP_CHECK_MD_OP(exp, create);
1903         EXP_MD_COUNTER_INCREMENT(exp, create);
1904         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1905                                        uid, gid, cap_effective, rdev, request);
1906         RETURN(rc);
1907 }
1908
1909 static inline int md_done_writing(struct obd_export *exp,
1910                                   struct md_op_data *op_data,
1911                                   struct md_open_data *mod)
1912 {
1913         int rc;
1914         ENTRY;
1915         EXP_CHECK_MD_OP(exp, done_writing);
1916         EXP_MD_COUNTER_INCREMENT(exp, done_writing);
1917         rc = MDP(exp->exp_obd, done_writing)(exp, op_data, mod);
1918         RETURN(rc);
1919 }
1920
1921 static inline int md_enqueue(struct obd_export *exp,
1922                              struct ldlm_enqueue_info *einfo,
1923                              struct lookup_intent *it,
1924                              struct md_op_data *op_data,
1925                              struct lustre_handle *lockh,
1926                              void *lmm, int lmmsize,
1927                              struct ptlrpc_request **req,
1928                              int extra_lock_flags)
1929 {
1930         int rc;
1931         ENTRY;
1932         EXP_CHECK_MD_OP(exp, enqueue);
1933         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1934         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, it, op_data, lockh,
1935                                         lmm, lmmsize, req, extra_lock_flags);
1936         RETURN(rc);
1937 }
1938
1939 static inline int md_getattr_name(struct obd_export *exp,
1940                                   struct md_op_data *op_data,
1941                                   struct ptlrpc_request **request)
1942 {
1943         int rc;
1944         ENTRY;
1945         EXP_CHECK_MD_OP(exp, getattr_name);
1946         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1947         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1948         RETURN(rc);
1949 }
1950
1951 static inline int md_intent_lock(struct obd_export *exp,
1952                                  struct md_op_data *op_data, void *lmm,
1953                                  int lmmsize, struct lookup_intent *it,
1954                                  int lookup_flags, struct ptlrpc_request **reqp,
1955                                  ldlm_blocking_callback cb_blocking,
1956                                  __u64 extra_lock_flags)
1957 {
1958         int rc;
1959         ENTRY;
1960         EXP_CHECK_MD_OP(exp, intent_lock);
1961         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1962         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, lmm, lmmsize,
1963                                             it, lookup_flags, reqp, cb_blocking,
1964                                             extra_lock_flags);
1965         RETURN(rc);
1966 }
1967
1968 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1969                           struct ptlrpc_request **request)
1970 {
1971         int rc;
1972         ENTRY;
1973         EXP_CHECK_MD_OP(exp, link);
1974         EXP_MD_COUNTER_INCREMENT(exp, link);
1975         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1976         RETURN(rc);
1977 }
1978
1979 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1980                             const char *old, int oldlen, const char *new,
1981                             int newlen, struct ptlrpc_request **request)
1982 {
1983         int rc;
1984         ENTRY;
1985         EXP_CHECK_MD_OP(exp, rename);
1986         EXP_MD_COUNTER_INCREMENT(exp, rename);
1987         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1988                                        newlen, request);
1989         RETURN(rc);
1990 }
1991
1992 static inline int md_is_subdir(struct obd_export *exp,
1993                                const struct lu_fid *pfid,
1994                                const struct lu_fid *cfid,
1995                                struct ptlrpc_request **request)
1996 {
1997         int rc;
1998         ENTRY;
1999         EXP_CHECK_MD_OP(exp, is_subdir);
2000         EXP_MD_COUNTER_INCREMENT(exp, is_subdir);
2001         rc = MDP(exp->exp_obd, is_subdir)(exp, pfid, cfid, request);
2002         RETURN(rc);
2003 }
2004
2005 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
2006                              void *ea, int ealen, void *ea2, int ea2len,
2007                              struct ptlrpc_request **request,
2008                              struct md_open_data **mod)
2009 {
2010         int rc;
2011         ENTRY;
2012         EXP_CHECK_MD_OP(exp, setattr);
2013         EXP_MD_COUNTER_INCREMENT(exp, setattr);
2014         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen,
2015                                         ea2, ea2len, request, mod);
2016         RETURN(rc);
2017 }
2018
2019 static inline int md_sync(struct obd_export *exp, const struct lu_fid *fid,
2020                           struct obd_capa *oc, struct ptlrpc_request **request)
2021 {
2022         int rc;
2023         ENTRY;
2024         EXP_CHECK_MD_OP(exp, sync);
2025         EXP_MD_COUNTER_INCREMENT(exp, sync);
2026         rc = MDP(exp->exp_obd, sync)(exp, fid, oc, request);
2027         RETURN(rc);
2028 }
2029
2030 static inline int md_readpage(struct obd_export *exp, struct md_op_data *opdata,
2031                               struct page **pages,
2032                               struct ptlrpc_request **request)
2033 {
2034         int rc;
2035         ENTRY;
2036         EXP_CHECK_MD_OP(exp, readpage);
2037         EXP_MD_COUNTER_INCREMENT(exp, readpage);
2038         rc = MDP(exp->exp_obd, readpage)(exp, opdata, pages, request);
2039         RETURN(rc);
2040 }
2041
2042 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
2043                             struct ptlrpc_request **request)
2044 {
2045         int rc;
2046         ENTRY;
2047         EXP_CHECK_MD_OP(exp, unlink);
2048         EXP_MD_COUNTER_INCREMENT(exp, unlink);
2049         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
2050         RETURN(rc);
2051 }
2052
2053 static inline int md_get_lustre_md(struct obd_export *exp,
2054                                    struct ptlrpc_request *req,
2055                                    struct obd_export *dt_exp,
2056                                    struct obd_export *md_exp,
2057                                    struct lustre_md *md)
2058 {
2059         ENTRY;
2060         EXP_CHECK_MD_OP(exp, get_lustre_md);
2061         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
2062         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
2063 }
2064
2065 static inline int md_free_lustre_md(struct obd_export *exp,
2066                                     struct lustre_md *md)
2067 {
2068         ENTRY;
2069         EXP_CHECK_MD_OP(exp, free_lustre_md);
2070         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
2071         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
2072 }
2073
2074 static inline int md_setxattr(struct obd_export *exp,
2075                               const struct lu_fid *fid, struct obd_capa *oc,
2076                               obd_valid valid, const char *name,
2077                               const char *input, int input_size,
2078                               int output_size, int flags, __u32 suppgid,
2079                               struct ptlrpc_request **request)
2080 {
2081         ENTRY;
2082         EXP_CHECK_MD_OP(exp, setxattr);
2083         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
2084         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, oc, valid, name, input,
2085                                            input_size, output_size, flags,
2086                                            suppgid, request));
2087 }
2088
2089 static inline int md_getxattr(struct obd_export *exp,
2090                               const struct lu_fid *fid, struct obd_capa *oc,
2091                               obd_valid valid, const char *name,
2092                               const char *input, int input_size,
2093                               int output_size, int flags,
2094                               struct ptlrpc_request **request)
2095 {
2096         ENTRY;
2097         EXP_CHECK_MD_OP(exp, getxattr);
2098         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
2099         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, oc, valid, name, input,
2100                                            input_size, output_size, flags,
2101                                            request));
2102 }
2103
2104 static inline int md_set_open_replay_data(struct obd_export *exp,
2105                                           struct obd_client_handle *och,
2106                                           struct ptlrpc_request *open_req)
2107 {
2108         ENTRY;
2109         EXP_CHECK_MD_OP(exp, set_open_replay_data);
2110         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
2111         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, open_req));
2112 }
2113
2114 static inline int md_clear_open_replay_data(struct obd_export *exp,
2115                                             struct obd_client_handle *och)
2116 {
2117         ENTRY;
2118         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
2119         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
2120         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
2121 }
2122
2123 static inline int md_set_lock_data(struct obd_export *exp,
2124                                    __u64 *lockh, void *data, __u64 *bits)
2125 {
2126         ENTRY;
2127         EXP_CHECK_MD_OP(exp, set_lock_data);
2128         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
2129         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
2130 }
2131
2132 static inline int md_cancel_unused(struct obd_export *exp,
2133                                    const struct lu_fid *fid,
2134                                    ldlm_policy_data_t *policy,
2135                                    ldlm_mode_t mode,
2136                                    ldlm_cancel_flags_t flags,
2137                                    void *opaque)
2138 {
2139         int rc;
2140         ENTRY;
2141
2142         EXP_CHECK_MD_OP(exp, cancel_unused);
2143         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
2144
2145         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
2146                                               flags, opaque);
2147         RETURN(rc);
2148 }
2149
2150 static inline ldlm_mode_t md_lock_match(struct obd_export *exp, __u64 flags,
2151                                         const struct lu_fid *fid,
2152                                         ldlm_type_t type,
2153                                         ldlm_policy_data_t *policy,
2154                                         ldlm_mode_t mode,
2155                                         struct lustre_handle *lockh)
2156 {
2157         ENTRY;
2158         EXP_CHECK_MD_OP(exp, lock_match);
2159         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
2160         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
2161                                              policy, mode, lockh));
2162 }
2163
2164 static inline int md_init_ea_size(struct obd_export *exp, int easize,
2165                                   int def_asize, int cookiesize)
2166 {
2167         ENTRY;
2168         EXP_CHECK_MD_OP(exp, init_ea_size);
2169         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
2170         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, easize, def_asize,
2171                                                cookiesize));
2172 }
2173
2174 static inline int md_get_remote_perm(struct obd_export *exp,
2175                                      const struct lu_fid *fid,
2176                                      struct obd_capa *oc, __u32 suppgid,
2177                                      struct ptlrpc_request **request)
2178 {
2179         ENTRY;
2180         EXP_CHECK_MD_OP(exp, get_remote_perm);
2181         EXP_MD_COUNTER_INCREMENT(exp, get_remote_perm);
2182         RETURN(MDP(exp->exp_obd, get_remote_perm)(exp, fid, oc, suppgid,
2183                                                   request));
2184 }
2185
2186 static inline int md_renew_capa(struct obd_export *exp, struct obd_capa *ocapa,
2187                                 renew_capa_cb_t cb)
2188 {
2189         int rc;
2190         ENTRY;
2191         EXP_CHECK_MD_OP(exp, renew_capa);
2192         EXP_MD_COUNTER_INCREMENT(exp, renew_capa);
2193         rc = MDP(exp->exp_obd, renew_capa)(exp, ocapa, cb);
2194         RETURN(rc);
2195 }
2196
2197 static inline int md_unpack_capa(struct obd_export *exp,
2198                                  struct ptlrpc_request *req,
2199                                  const struct req_msg_field *field,
2200                                  struct obd_capa **oc)
2201 {
2202         int rc;
2203         ENTRY;
2204         EXP_CHECK_MD_OP(exp, unpack_capa);
2205         EXP_MD_COUNTER_INCREMENT(exp, unpack_capa);
2206         rc = MDP(exp->exp_obd, unpack_capa)(exp, req, field, oc);
2207         RETURN(rc);
2208 }
2209
2210 static inline int md_intent_getattr_async(struct obd_export *exp,
2211                                           struct md_enqueue_info *minfo,
2212                                           struct ldlm_enqueue_info *einfo)
2213 {
2214         int rc;
2215         ENTRY;
2216         EXP_CHECK_MD_OP(exp, intent_getattr_async);
2217         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
2218         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo, einfo);
2219         RETURN(rc);
2220 }
2221
2222 static inline int md_revalidate_lock(struct obd_export *exp,
2223                                      struct lookup_intent *it,
2224                                      struct lu_fid *fid, __u64 *bits)
2225 {
2226         int rc;
2227         ENTRY;
2228         EXP_CHECK_MD_OP(exp, revalidate_lock);
2229         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
2230         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
2231         RETURN(rc);
2232 }
2233
2234
2235 /* OBD Metadata Support */
2236
2237 extern int obd_init_caches(void);
2238 extern void obd_cleanup_caches(void);
2239
2240 /* support routines */
2241 extern cfs_mem_cache_t *obdo_cachep;
2242
2243 #define OBDO_ALLOC(ptr)                                                       \
2244 do {                                                                          \
2245         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, CFS_ALLOC_IO);             \
2246 } while(0)
2247
2248 #define OBDO_FREE(ptr)                                                        \
2249 do {                                                                          \
2250         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
2251 } while(0)
2252
2253
2254 static inline void obdo2fid(struct obdo *oa, struct lu_fid *fid)
2255 {
2256         /* something here */
2257 }
2258
2259 static inline void fid2obdo(struct lu_fid *fid, struct obdo *oa)
2260 {
2261         /* something here */
2262 }
2263
2264 typedef int (*register_osp_cb)(void *data);
2265
2266 struct osp_register_item {
2267         struct obd_export **ori_exp;
2268         register_osp_cb     ori_cb_func;
2269         void               *ori_cb_data;
2270         cfs_list_t          ori_list;
2271         char                ori_name[MTI_NAME_MAXLEN];
2272 };
2273
2274 /* I'm as embarrassed about this as you are.
2275  *
2276  * <shaver> // XXX do not look into _superhack with remaining eye
2277  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
2278 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
2279
2280 /* obd_mount.c */
2281 int server_name2fsname(char *svname, char *fsname, char **endptr);
2282 int lustre_register_osp_item(char *ospname, struct obd_export **exp,
2283                              register_osp_cb cb_func, void *cb_data);
2284 void lustre_deregister_osp_item(struct obd_export **exp);
2285 int tgt_name2ospname(char *ost_name, char *osp_name);
2286
2287 /* sysctl.c */
2288 extern void obd_sysctl_init (void);
2289 extern void obd_sysctl_clean (void);
2290
2291 /* uuid.c  */
2292 typedef __u8 class_uuid_t[16];
2293 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
2294
2295 /* lustre_peer.c    */
2296 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
2297 int class_add_uuid(const char *uuid, __u64 nid);
2298 int class_del_uuid (const char *uuid);
2299 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
2300 void class_init_uuidlist(void);
2301 void class_exit_uuidlist(void);
2302
2303 /* mea.c */
2304 int mea_name2idx(struct lmv_stripe_md *mea, const char *name, int namelen);
2305 int raw_name2idx(int hashtype, int count, const char *name, int namelen);
2306
2307 /* prng.c */
2308 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
2309
2310 #endif /* __LINUX_OBD_CLASS_H */