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 void obdo_cpu_to_le(struct obdo *dobdo, struct obdo *sobdo);
 342 void obdo_le_to_cpu(struct obdo *dobdo, struct obdo *sobdo);
 343
 344 #define OBT(dev)        (dev)->obd_type
 345 #define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 346 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
 347 #define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
 348
 349 /* Ensure obd_setup: used for cleanup which must be called
 350    while obd is stopping */
 351 #define OBD_CHECK_DEV(obd)                                      \
 352 do {                                                            \
 353         if (!(obd)) {                                           \
 354                 CERROR("NULL device\n");                        \
 355                 RETURN(-ENODEV);                                \
 356         }                                                       \
 357 } while (0)
 358
 359 /* ensure obd_setup and !obd_stopping */
 360 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 361 do {                                                            \
 362         OBD_CHECK_DEV(obd);                                     \
 363         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 364                 CERROR("Device %d not setup\n",                 \
 365                        (obd)->obd_minor);                       \
 366                 RETURN(-ENODEV);                                \
 367         }                                                       \
 368 } while (0)
 369
 370
 371 #ifdef LPROCFS
 372 #define OBD_COUNTER_OFFSET(op)                                  \
 373         ((offsetof(struct obd_ops, o_ ## op) -                  \
 374           offsetof(struct obd_ops, o_iocontrol))                \
 375          / sizeof(((struct obd_ops *)(0))->o_iocontrol))
 376
 377 #define OBD_COUNTER_INCREMENT(obdx, op)                           \
 378         if ((obdx)->obd_stats != NULL) {                          \
 379                 unsigned int coffset;                             \
 380                 coffset = (unsigned int)((obdx)->obd_cntr_base) + \
 381                         OBD_COUNTER_OFFSET(op);                   \
 382                 LASSERT(coffset < (obdx)->obd_stats->ls_num);     \
 383                 lprocfs_counter_incr((obdx)->obd_stats, coffset); \
 384         }
 385
 386 #define EXP_COUNTER_INCREMENT(export, op)                                    \
 387         if ((export)->exp_obd->obd_stats != NULL) {                          \
 388                 unsigned int coffset;                                        \
 389                 coffset = (unsigned int)((export)->exp_obd->obd_cntr_base) + \
 390                         OBD_COUNTER_OFFSET(op);                              \
 391                 LASSERT(coffset < (export)->exp_obd->obd_stats->ls_num);     \
 392                 lprocfs_counter_incr((export)->exp_obd->obd_stats, coffset); \
 393                 if ((export)->exp_nid_stats != NULL &&                       \
 394                     (export)->exp_nid_stats->nid_stats != NULL)              \
 395                         lprocfs_counter_incr(                                \
 396                                 (export)->exp_nid_stats->nid_stats, coffset);\
 397         }
 398
 399 #define MD_COUNTER_OFFSET(op)                                   \
 400         ((offsetof(struct md_ops, m_ ## op) -                   \
 401           offsetof(struct md_ops, m_getstatus))                 \
 402          / sizeof(((struct md_ops *)(0))->m_getstatus))
 403
 404 #define MD_COUNTER_INCREMENT(obdx, op)                           \
 405         if ((obd)->md_stats != NULL) {                           \
 406                 unsigned int coffset;                            \
 407                 coffset = (unsigned int)((obdx)->md_cntr_base) + \
 408                         MD_COUNTER_OFFSET(op);                   \
 409                 LASSERT(coffset < (obdx)->md_stats->ls_num);     \
 410                 lprocfs_counter_incr((obdx)->md_stats, coffset); \
 411         }
 412
 413 #define EXP_MD_COUNTER_INCREMENT(export, op)                                 \
 414         if ((export)->exp_obd->obd_stats != NULL) {                          \
 415                 unsigned int coffset;                                        \
 416                 coffset = (unsigned int)((export)->exp_obd->md_cntr_base) +  \
 417                         MD_COUNTER_OFFSET(op);                               \
 418                 LASSERT(coffset < (export)->exp_obd->md_stats->ls_num);      \
 419                 lprocfs_counter_incr((export)->exp_obd->md_stats, coffset);  \
 420                 if ((export)->exp_md_stats != NULL)                          \
 421                         lprocfs_counter_incr(                                \
 422                                 (export)->exp_md_stats, coffset);            \
 423         }
 424
 425 #else
 426 #define OBD_COUNTER_OFFSET(op)
 427 #define OBD_COUNTER_INCREMENT(obd, op)
 428 #define EXP_COUNTER_INCREMENT(exp, op)
 429 #define MD_COUNTER_INCREMENT(obd, op)
 430 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 431 #endif
 432
 433 static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
 434 {
 435         /* Always add in ldlm_stats */
 436         tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC
 437                                                   ,LPROCFS_STATS_FLAG_NOPERCPU);
 438         if (tmp->nid_ldlm_stats == NULL)
 439                 return -ENOMEM;
 440
 441         lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
 442
 443         return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
 444                                       tmp->nid_ldlm_stats);
 445 }
 446
 447 #define OBD_CHECK_MD_OP(obd, op, err)                           \
 448 do {                                                            \
 449         if (!OBT(obd) || !MDP((obd), op)) {                     \
 450                 if (err)                                        \
 451                         CERROR("md_" #op ": dev %s/%d no operation\n", \
 452                                obd->obd_name, obd->obd_minor);  \
 453                 RETURN(err);                                    \
 454         }                                                       \
 455 } while (0)
 456
 457 #define EXP_CHECK_MD_OP(exp, op)                                \
 458 do {                                                            \
 459         if ((exp) == NULL) {                                    \
 460                 CERROR("obd_" #op ": NULL export\n");           \
 461                 RETURN(-ENODEV);                                \
 462         }                                                       \
 463         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 464                 CERROR("obd_" #op ": cleaned up obd\n");        \
 465                 RETURN(-EOPNOTSUPP);                            \
 466         }                                                       \
 467         if (!OBT((exp)->exp_obd) || !MDP((exp)->exp_obd, op)) { \
 468                 CERROR("obd_" #op ": dev %s/%d no operation\n", \
 469                        (exp)->exp_obd->obd_name,                \
 470                        (exp)->exp_obd->obd_minor);              \
 471                 RETURN(-EOPNOTSUPP);                            \
 472         }                                                       \
 473 } while (0)
 474
 475
 476 #define OBD_CHECK_DT_OP(obd, op, err)                           \
 477 do {                                                            \
 478         if (!OBT(obd) || !OBP((obd), op)) {                     \
 479                 if (err)                                        \
 480                         CERROR("obd_" #op ": dev %d no operation\n",    \
 481                                obd->obd_minor);                 \
 482                 RETURN(err);                                    \
 483         }                                                       \
 484 } while (0)
 485
 486 #define EXP_CHECK_DT_OP(exp, op)                                \
 487 do {                                                            \
 488         if ((exp) == NULL) {                                    \
 489                 CERROR("obd_" #op ": NULL export\n");           \
 490                 RETURN(-ENODEV);                                \
 491         }                                                       \
 492         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 493                 CERROR("obd_" #op ": cleaned up obd\n");        \
 494                 RETURN(-EOPNOTSUPP);                            \
 495         }                                                       \
 496         if (!OBT((exp)->exp_obd) || !OBP((exp)->exp_obd, op)) { \
 497                 CERROR("obd_" #op ": dev %d no operation\n",    \
 498                        (exp)->exp_obd->obd_minor);              \
 499                 RETURN(-EOPNOTSUPP);                            \
 500         }                                                       \
 501 } while (0)
 502
 503 #define CTXT_CHECK_OP(ctxt, op, err)                                 \
 504 do {                                                                 \
 505         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {             \
 506                 if (err)                                             \
 507                         CERROR("lop_" #op ": dev %d no operation\n", \
 508                                ctxt->loc_obd->obd_minor);            \
 509                 RETURN(err);                                         \
 510         }                                                            \
 511 } while (0)
 512
 513 static inline int class_devno_max(void)
 514 {
 515         return MAX_OBD_DEVICES;
 516 }
 517
 518 static inline int obd_get_info(const struct lu_env *env,
 519                                struct obd_export *exp, __u32 keylen,
 520                                void *key, __u32 *vallen, void *val,
 521                                struct lov_stripe_md *lsm)
 522 {
 523         int rc;
 524         ENTRY;
 525
 526         EXP_CHECK_DT_OP(exp, get_info);
 527         EXP_COUNTER_INCREMENT(exp, get_info);
 528
 529         rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val,
 530                                          lsm);
 531         RETURN(rc);
 532 }
 533
 534 static inline int obd_set_info_async(const struct lu_env *env,
 535                                      struct obd_export *exp, obd_count keylen,
 536                                      void *key, obd_count vallen, void *val,
 537                                      struct ptlrpc_request_set *set)
 538 {
 539         int rc;
 540         ENTRY;
 541
 542         EXP_CHECK_DT_OP(exp, set_info_async);
 543         EXP_COUNTER_INCREMENT(exp, set_info_async);
 544
 545         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 546                                                val, set);
 547         RETURN(rc);
 548 }
 549
 550 /*
 551  * obd-lu integration.
 552  *
 553  * Functionality is being moved into new lu_device-based layering, but some
 554  * pieces of configuration process are still based on obd devices.
 555  *
 556  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 557  * subsume ->o_setup() methods of obd devices they replace. The same for
 558  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 559  * result, obd_setup() and obd_process_config() branch and call one XOR
 560  * another.
 561  *
 562  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 563  * lu_device_type_operations::ldto_device_free() fully implement the
 564  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 565  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 566  */
 567
 568 #define DECLARE_LU_VARS(ldt, d)                 \
 569         struct lu_device_type *ldt;       \
 570         struct lu_device *d
 571
 572 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 573 {
 574         int rc;
 575         DECLARE_LU_VARS(ldt, d);
 576         ENTRY;
 577
 578         ldt = obd->obd_type->typ_lu;
 579         if (ldt != NULL) {
 580                 struct lu_context  session_ctx;
 581                 struct lu_env env;
 582                 lu_context_init(&session_ctx, LCT_SESSION);
 583                 session_ctx.lc_thread = NULL;
 584                 lu_context_enter(&session_ctx);
 585
 586                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 587                 if (rc == 0) {
 588                         env.le_ses = &session_ctx;
 589                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 590                         lu_env_fini(&env);
 591                         if (!IS_ERR(d)) {
 592                                 obd->obd_lu_dev = d;
 593                                 d->ld_obd = obd;
 594                                 rc = 0;
 595                         } else
 596                                 rc = PTR_ERR(d);
 597                 }
 598                 lu_context_exit(&session_ctx);
 599                 lu_context_fini(&session_ctx);
 600
 601         } else {
 602                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
 603                 OBD_COUNTER_INCREMENT(obd, setup);
 604                 rc = OBP(obd, setup)(obd, cfg);
 605         }
 606         RETURN(rc);
 607 }
 608
 609 static inline int obd_precleanup(struct obd_device *obd,
 610                                  enum obd_cleanup_stage cleanup_stage)
 611 {
 612         int rc;
 613         DECLARE_LU_VARS(ldt, d);
 614         ENTRY;
 615
 616         OBD_CHECK_DEV(obd);
 617         ldt = obd->obd_type->typ_lu;
 618         d = obd->obd_lu_dev;
 619         if (ldt != NULL && d != NULL) {
 620                 if (cleanup_stage == OBD_CLEANUP_EXPORTS) {
 621                         struct lu_env env;
 622
 623                         rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 624                         if (rc == 0) {
 625                                 ldt->ldt_ops->ldto_device_fini(&env, d);
 626                                 lu_env_fini(&env);
 627                         }
 628                 }
 629         }
 630         OBD_CHECK_DT_OP(obd, precleanup, 0);
 631         OBD_COUNTER_INCREMENT(obd, precleanup);
 632
 633         rc = OBP(obd, precleanup)(obd, cleanup_stage);
 634         RETURN(rc);
 635 }
 636
 637 static inline int obd_cleanup(struct obd_device *obd)
 638 {
 639         int rc;
 640         DECLARE_LU_VARS(ldt, d);
 641         ENTRY;
 642
 643         OBD_CHECK_DEV(obd);
 644
 645         ldt = obd->obd_type->typ_lu;
 646         d = obd->obd_lu_dev;
 647         if (ldt != NULL && d != NULL) {
 648                 struct lu_env env;
 649
 650                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 651                 if (rc == 0) {
 652                         ldt->ldt_ops->ldto_device_free(&env, d);
 653                         lu_env_fini(&env);
 654                         obd->obd_lu_dev = NULL;
 655                 }
 656         }
 657         OBD_CHECK_DT_OP(obd, cleanup, 0);
 658         OBD_COUNTER_INCREMENT(obd, cleanup);
 659
 660         rc = OBP(obd, cleanup)(obd);
 661         RETURN(rc);
 662 }
 663
 664 static inline void obd_cleanup_client_import(struct obd_device *obd)
 665 {
 666         ENTRY;
 667
 668         /* If we set up but never connected, the
 669            client import will not have been cleaned. */
 670         down_write(&obd->u.cli.cl_sem);
 671         if (obd->u.cli.cl_import) {
 672                 struct obd_import *imp;
 673                 imp = obd->u.cli.cl_import;
 674                 CDEBUG(D_CONFIG, "%s: client import never connected\n",
 675                        obd->obd_name);
 676                 ptlrpc_invalidate_import(imp);
 677                 if (imp->imp_rq_pool) {
 678                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
 679                         imp->imp_rq_pool = NULL;
 680                 }
 681                 client_destroy_import(imp);
 682                 obd->u.cli.cl_import = NULL;
 683         }
 684         up_write(&obd->u.cli.cl_sem);
 685
 686         EXIT;
 687 }
 688
 689 static inline int
 690 obd_process_config(struct obd_device *obd, int datalen, void *data)
 691 {
 692         int rc;
 693         DECLARE_LU_VARS(ldt, d);
 694         ENTRY;
 695
 696         OBD_CHECK_DEV(obd);
 697
 698         obd->obd_process_conf = 1;
 699         ldt = obd->obd_type->typ_lu;
 700         d = obd->obd_lu_dev;
 701         if (ldt != NULL && d != NULL) {
 702                 struct lu_env env;
 703
 704                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 705                 if (rc == 0) {
 706                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 707                         lu_env_fini(&env);
 708                 }
 709         } else {
 710                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
 711                 rc = OBP(obd, process_config)(obd, datalen, data);
 712         }
 713         OBD_COUNTER_INCREMENT(obd, process_config);
 714         obd->obd_process_conf = 0;
 715
 716         RETURN(rc);
 717 }
 718
 719 /* Pack an in-memory MD struct for storage on disk.
 720  * Returns +ve size of packed MD (0 for free), or -ve error.
 721  *
 722  * If @disk_tgt == NULL, MD size is returned (max size if @mem_src == NULL).
 723  * If @*disk_tgt != NULL and @mem_src == NULL, @*disk_tgt will be freed.
 724  * If @*disk_tgt == NULL, it will be allocated
 725  */
 726 static inline int obd_packmd(struct obd_export *exp,
 727                              struct lov_mds_md **disk_tgt,
 728                              struct lov_stripe_md *mem_src)
 729 {
 730         int rc;
 731         ENTRY;
 732
 733         EXP_CHECK_DT_OP(exp, packmd);
 734         EXP_COUNTER_INCREMENT(exp, packmd);
 735
 736         rc = OBP(exp->exp_obd, packmd)(exp, disk_tgt, mem_src);
 737         RETURN(rc);
 738 }
 739
 740 static inline int obd_size_diskmd(struct obd_export *exp,
 741                                   struct lov_stripe_md *mem_src)
 742 {
 743         return obd_packmd(exp, NULL, mem_src);
 744 }
 745
 746 /* helper functions */
 747 static inline int obd_alloc_diskmd(struct obd_export *exp,
 748                                    struct lov_mds_md **disk_tgt)
 749 {
 750         LASSERT(disk_tgt);
 751         LASSERT(*disk_tgt == NULL);
 752         return obd_packmd(exp, disk_tgt, NULL);
 753 }
 754
 755 static inline int obd_free_diskmd(struct obd_export *exp,
 756                                   struct lov_mds_md **disk_tgt)
 757 {
 758         LASSERT(disk_tgt);
 759         LASSERT(*disk_tgt);
 760         /*
 761          * LU-2590, for caller's convenience, *disk_tgt could be host
 762          * endianness, it needs swab to LE if necessary, while just
 763          * lov_mds_md header needs it for figuring out how much memory
 764          * needs to be freed.
 765          */
 766         if ((cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) &&
 767             (((*disk_tgt)->lmm_magic == LOV_MAGIC_V1) ||
 768              ((*disk_tgt)->lmm_magic == LOV_MAGIC_V3)))
 769                 lustre_swab_lov_mds_md(*disk_tgt);
 770         return obd_packmd(exp, disk_tgt, NULL);
 771 }
 772
 773 /* Unpack an MD struct from disk to in-memory format.
 774  * Returns +ve size of unpacked MD (0 for free), or -ve error.
 775  *
 776  * If @mem_tgt == NULL, MD size is returned (max size if @disk_src == NULL).
 777  * If @*mem_tgt != NULL and @disk_src == NULL, @*mem_tgt will be freed.
 778  * If @*mem_tgt == NULL, it will be allocated
 779  */
 780 static inline int obd_unpackmd(struct obd_export *exp,
 781                                struct lov_stripe_md **mem_tgt,
 782                                struct lov_mds_md *disk_src,
 783                                int disk_len)
 784 {
 785         int rc;
 786         ENTRY;
 787
 788         EXP_CHECK_DT_OP(exp, unpackmd);
 789         EXP_COUNTER_INCREMENT(exp, unpackmd);
 790
 791         rc = OBP(exp->exp_obd, unpackmd)(exp, mem_tgt, disk_src, disk_len);
 792         RETURN(rc);
 793 }
 794
 795 /* helper functions */
 796 static inline int obd_alloc_memmd(struct obd_export *exp,
 797                                   struct lov_stripe_md **mem_tgt)
 798 {
 799         LASSERT(mem_tgt);
 800         LASSERT(*mem_tgt == NULL);
 801         return obd_unpackmd(exp, mem_tgt, NULL, 0);
 802 }
 803
 804 static inline int obd_free_memmd(struct obd_export *exp,
 805                                  struct lov_stripe_md **mem_tgt)
 806 {
 807         int rc;
 808
 809         LASSERT(mem_tgt);
 810         LASSERT(*mem_tgt);
 811         rc = obd_unpackmd(exp, mem_tgt, NULL, 0);
 812         *mem_tgt = NULL;
 813         return rc;
 814 }
 815
 816 static inline int obd_precreate(struct obd_export *exp)
 817 {
 818         int rc;
 819         ENTRY;
 820
 821         EXP_CHECK_DT_OP(exp, precreate);
 822         OBD_COUNTER_INCREMENT(exp->exp_obd, precreate);
 823
 824         rc = OBP(exp->exp_obd, precreate)(exp);
 825         RETURN(rc);
 826 }
 827
 828 static inline int obd_create_async(struct obd_export *exp,
 829                                    struct obd_info *oinfo,
 830                                    struct lov_stripe_md **ea,
 831                                    struct obd_trans_info *oti)
 832 {
 833         int rc;
 834         ENTRY;
 835
 836         EXP_CHECK_DT_OP(exp, create_async);
 837         EXP_COUNTER_INCREMENT(exp, create_async);
 838
 839         rc = OBP(exp->exp_obd, create_async)(exp, oinfo, ea, oti);
 840         RETURN(rc);
 841 }
 842
 843 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 844                              struct obdo *obdo, struct lov_stripe_md **ea,
 845                              struct obd_trans_info *oti)
 846 {
 847         int rc;
 848         ENTRY;
 849
 850         EXP_CHECK_DT_OP(exp, create);
 851         EXP_COUNTER_INCREMENT(exp, create);
 852
 853         rc = OBP(exp->exp_obd, create)(env, exp, obdo, ea, oti);
 854         RETURN(rc);
 855 }
 856
 857 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 858                               struct obdo *obdo, struct lov_stripe_md *ea,
 859                               struct obd_trans_info *oti,
 860                               struct obd_export *md_exp, void *capa)
 861 {
 862         int rc;
 863         ENTRY;
 864
 865         EXP_CHECK_DT_OP(exp, destroy);
 866         EXP_COUNTER_INCREMENT(exp, destroy);
 867
 868         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo, ea, oti, md_exp, capa);
 869         RETURN(rc);
 870 }
 871
 872 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 873                               struct obd_info *oinfo)
 874 {
 875         int rc;
 876         ENTRY;
 877
 878         EXP_CHECK_DT_OP(exp, getattr);
 879         EXP_COUNTER_INCREMENT(exp, getattr);
 880
 881         rc = OBP(exp->exp_obd, getattr)(env, exp, oinfo);
 882         RETURN(rc);
 883 }
 884
 885 static inline int obd_getattr_async(struct obd_export *exp,
 886                                     struct obd_info *oinfo,
 887                                     struct ptlrpc_request_set *set)
 888 {
 889         int rc;
 890         ENTRY;
 891
 892         EXP_CHECK_DT_OP(exp, getattr_async);
 893         EXP_COUNTER_INCREMENT(exp, getattr_async);
 894
 895         rc = OBP(exp->exp_obd, getattr_async)(exp, oinfo, set);
 896         RETURN(rc);
 897 }
 898
 899 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 900                               struct obd_info *oinfo,
 901                               struct obd_trans_info *oti)
 902 {
 903         int rc;
 904         ENTRY;
 905
 906         EXP_CHECK_DT_OP(exp, setattr);
 907         EXP_COUNTER_INCREMENT(exp, setattr);
 908
 909         rc = OBP(exp->exp_obd, setattr)(env, exp, oinfo, oti);
 910         RETURN(rc);
 911 }
 912
 913 /* This performs all the requests set init/wait/destroy actions. */
 914 static inline int obd_setattr_rqset(struct obd_export *exp,
 915                                     struct obd_info *oinfo,
 916                                     struct obd_trans_info *oti)
 917 {
 918         struct ptlrpc_request_set *set = NULL;
 919         int rc;
 920         ENTRY;
 921
 922         EXP_CHECK_DT_OP(exp, setattr_async);
 923         EXP_COUNTER_INCREMENT(exp, setattr_async);
 924
 925         set =  ptlrpc_prep_set();
 926         if (set == NULL)
 927                 RETURN(-ENOMEM);
 928
 929         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 930         if (rc == 0)
 931                 rc = ptlrpc_set_wait(set);
 932         ptlrpc_set_destroy(set);
 933         RETURN(rc);
 934 }
 935
 936 /* This adds all the requests into @set if @set != NULL, otherwise
 937    all requests are sent asynchronously without waiting for response. */
 938 static inline int obd_setattr_async(struct obd_export *exp,
 939                                     struct obd_info *oinfo,
 940                                     struct obd_trans_info *oti,
 941                                     struct ptlrpc_request_set *set)
 942 {
 943         int rc;
 944         ENTRY;
 945
 946         EXP_CHECK_DT_OP(exp, setattr_async);
 947         EXP_COUNTER_INCREMENT(exp, setattr_async);
 948
 949         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 950         RETURN(rc);
 951 }
 952
 953 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 954                                int priority)
 955 {
 956         struct obd_device *obd = imp->imp_obd;
 957         int rc;
 958         ENTRY;
 959
 960         OBD_CHECK_DEV_ACTIVE(obd);
 961         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 962         OBD_COUNTER_INCREMENT(obd, add_conn);
 963
 964         rc = OBP(obd, add_conn)(imp, uuid, priority);
 965         RETURN(rc);
 966 }
 967
 968 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 969 {
 970         struct obd_device *obd = imp->imp_obd;
 971         int rc;
 972         ENTRY;
 973
 974         OBD_CHECK_DEV_ACTIVE(obd);
 975         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 976         OBD_COUNTER_INCREMENT(obd, del_conn);
 977
 978         rc = OBP(obd, del_conn)(imp, uuid);
 979         RETURN(rc);
 980 }
 981
 982 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 983 {
 984         struct obd_uuid *uuid;
 985         ENTRY;
 986
 987         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 988         EXP_COUNTER_INCREMENT(exp, get_uuid);
 989
 990         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 991         RETURN(uuid);
 992 }
 993
 994 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 995  * @param exp New export handle
 996  * @param d Connect data, supported flags are set, flags also understood
 997  *    by obd are returned.
 998  */
 999 static inline int obd_connect(const struct lu_env *env,
1000                               struct obd_export **exp,struct obd_device *obd,
1001                               struct obd_uuid *cluuid,
1002                               struct obd_connect_data *data,
1003                               void *localdata)
1004 {
1005         int rc;
1006         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
1007                                                    * check */
1008         ENTRY;
1009
1010         OBD_CHECK_DEV_ACTIVE(obd);
1011         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
1012         OBD_COUNTER_INCREMENT(obd, connect);
1013
1014         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
1015         /* check that only subset is granted */
1016         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
1017                                     data->ocd_connect_flags));
1018         RETURN(rc);
1019 }
1020
1021 static inline int obd_reconnect(const struct lu_env *env,
1022                                 struct obd_export *exp,
1023                                 struct obd_device *obd,
1024                                 struct obd_uuid *cluuid,
1025                                 struct obd_connect_data *d,
1026                                 void *localdata)
1027 {
1028         int rc;
1029         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
1030                                                    * check */
1031
1032         ENTRY;
1033
1034         OBD_CHECK_DEV_ACTIVE(obd);
1035         OBD_CHECK_DT_OP(obd, reconnect, 0);
1036         OBD_COUNTER_INCREMENT(obd, reconnect);
1037
1038         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
1039         /* check that only subset is granted */
1040         LASSERT(ergo(d != NULL,
1041                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
1042         RETURN(rc);
1043 }
1044
1045 static inline int obd_disconnect(struct obd_export *exp)
1046 {
1047         int rc;
1048         ENTRY;
1049
1050         EXP_CHECK_DT_OP(exp, disconnect);
1051         EXP_COUNTER_INCREMENT(exp, disconnect);
1052
1053         rc = OBP(exp->exp_obd, disconnect)(exp);
1054         RETURN(rc);
1055 }
1056
1057 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
1058                                enum lu_cli_type type)
1059 {
1060         int rc;
1061         ENTRY;
1062
1063         OBD_CHECK_DT_OP(obd, fid_init, 0);
1064         OBD_COUNTER_INCREMENT(obd, fid_init);
1065
1066         rc = OBP(obd, fid_init)(obd, exp, type);
1067         RETURN(rc);
1068 }
1069
1070 static inline int obd_fid_fini(struct obd_device *obd)
1071 {
1072         int rc;
1073         ENTRY;
1074
1075         OBD_CHECK_DT_OP(obd, fid_fini, 0);
1076         OBD_COUNTER_INCREMENT(obd, fid_fini);
1077
1078         rc = OBP(obd, fid_fini)(obd);
1079         RETURN(rc);
1080 }
1081
1082 static inline int obd_fid_alloc(struct obd_export *exp,
1083                                 struct lu_fid *fid,
1084                                 struct md_op_data *op_data)
1085 {
1086         int rc;
1087         ENTRY;
1088
1089         EXP_CHECK_DT_OP(exp, fid_alloc);
1090         EXP_COUNTER_INCREMENT(exp, fid_alloc);
1091
1092         rc = OBP(exp->exp_obd, fid_alloc)(exp, fid, op_data);
1093         RETURN(rc);
1094 }
1095
1096 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
1097 {
1098         int rc;
1099         ENTRY;
1100
1101         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
1102         EXP_COUNTER_INCREMENT(exp, ping);
1103
1104         rc = OBP(exp->exp_obd, ping)(env, exp);
1105         RETURN(rc);
1106 }
1107
1108 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
1109 {
1110         int rc;
1111         ENTRY;
1112
1113         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
1114         OBD_COUNTER_INCREMENT(obd, pool_new);
1115
1116         rc = OBP(obd, pool_new)(obd, poolname);
1117         RETURN(rc);
1118 }
1119
1120 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
1121 {
1122         int rc;
1123         ENTRY;
1124
1125         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
1126         OBD_COUNTER_INCREMENT(obd, pool_del);
1127
1128         rc = OBP(obd, pool_del)(obd, poolname);
1129         RETURN(rc);
1130 }
1131
1132 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
1133 {
1134         int rc;
1135         ENTRY;
1136
1137         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
1138         OBD_COUNTER_INCREMENT(obd, pool_add);
1139
1140         rc = OBP(obd, pool_add)(obd, poolname, ostname);
1141         RETURN(rc);
1142 }
1143
1144 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
1145 {
1146         int rc;
1147         ENTRY;
1148
1149         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
1150         OBD_COUNTER_INCREMENT(obd, pool_rem);
1151
1152         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
1153         RETURN(rc);
1154 }
1155
1156 static inline void obd_getref(struct obd_device *obd)
1157 {
1158         ENTRY;
1159         if (OBT(obd) && OBP(obd, getref)) {
1160                 OBD_COUNTER_INCREMENT(obd, getref);
1161                 OBP(obd, getref)(obd);
1162         }
1163         EXIT;
1164 }
1165
1166 static inline void obd_putref(struct obd_device *obd)
1167 {
1168         ENTRY;
1169         if (OBT(obd) && OBP(obd, putref)) {
1170                 OBD_COUNTER_INCREMENT(obd, putref);
1171                 OBP(obd, putref)(obd);
1172         }
1173         EXIT;
1174 }
1175
1176 static inline int obd_init_export(struct obd_export *exp)
1177 {
1178         int rc = 0;
1179
1180         ENTRY;
1181         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1182             OBP((exp)->exp_obd, init_export))
1183                 rc = OBP(exp->exp_obd, init_export)(exp);
1184         RETURN(rc);
1185 }
1186
1187 static inline int obd_destroy_export(struct obd_export *exp)
1188 {
1189         ENTRY;
1190         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1191             OBP((exp)->exp_obd, destroy_export))
1192                 OBP(exp->exp_obd, destroy_export)(exp);
1193         RETURN(0);
1194 }
1195
1196 static inline int obd_extent_calc(struct obd_export *exp,
1197                                   struct lov_stripe_md *md,
1198                                   int cmd, obd_off *offset)
1199 {
1200         int rc;
1201         ENTRY;
1202         EXP_CHECK_DT_OP(exp, extent_calc);
1203         rc = OBP(exp->exp_obd, extent_calc)(exp, md, cmd, offset);
1204         RETURN(rc);
1205 }
1206
1207 static inline struct dentry *
1208 obd_lvfs_fid2dentry(struct obd_export *exp, __u64 id_ino, __u32 gen, __u64 gr)
1209 {
1210         struct lvfs_run_ctxt *ctxt = &exp->exp_obd->obd_lvfs_ctxt;
1211         LASSERT(exp->exp_obd);
1212
1213         return ctxt->cb_ops.l_fid2dentry(id_ino, gen, gr, exp->exp_obd);
1214 }
1215
1216 static inline int
1217 obd_lvfs_open_llog(struct obd_export *exp, __u64 id_ino, struct dentry *dentry)
1218 {
1219         LASSERT(exp->exp_obd);
1220         CERROR("FIXME what's the story here?  This needs to be an obd fn?\n");
1221 #if 0
1222         return lvfs_open_llog(&exp->exp_obd->obd_lvfs_ctxt, id_ino,
1223                               dentry, exp->exp_obd);
1224 #endif
1225         return 0;
1226 }
1227
1228 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1229  * If the cache is older than @max_age we will get a new value from the
1230  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1231 static inline int obd_statfs_async(struct obd_export *exp,
1232                                    struct obd_info *oinfo,
1233                                    __u64 max_age,
1234                                    struct ptlrpc_request_set *rqset)
1235 {
1236         int rc = 0;
1237         struct obd_device *obd;
1238         ENTRY;
1239
1240         if (exp == NULL || exp->exp_obd == NULL)
1241                 RETURN(-EINVAL);
1242
1243         obd = exp->exp_obd;
1244         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1245         OBD_COUNTER_INCREMENT(obd, statfs);
1246
1247         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
1248                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1249         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1250                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1251         } else {
1252                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
1253                        " objects "LPU64"/"LPU64"\n",
1254                        obd->obd_name, &obd->obd_osfs,
1255                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1256                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1257                 spin_lock(&obd->obd_osfs_lock);
1258                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1259                 spin_unlock(&obd->obd_osfs_lock);
1260                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1261                 if (oinfo->oi_cb_up)
1262                         oinfo->oi_cb_up(oinfo, 0);
1263         }
1264         RETURN(rc);
1265 }
1266
1267 static inline int obd_statfs_rqset(struct obd_export *exp,
1268                                    struct obd_statfs *osfs, __u64 max_age,
1269                                    __u32 flags)
1270 {
1271         struct ptlrpc_request_set *set = NULL;
1272         struct obd_info oinfo = { { { 0 } } };
1273         int rc = 0;
1274         ENTRY;
1275
1276         set =  ptlrpc_prep_set();
1277         if (set == NULL)
1278                 RETURN(-ENOMEM);
1279
1280         oinfo.oi_osfs = osfs;
1281         oinfo.oi_flags = flags;
1282         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1283         if (rc == 0)
1284                 rc = ptlrpc_set_wait(set);
1285         ptlrpc_set_destroy(set);
1286         RETURN(rc);
1287 }
1288
1289 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1290  * If the cache is older than @max_age we will get a new value from the
1291  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1292 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1293                              struct obd_statfs *osfs, __u64 max_age,
1294                              __u32 flags)
1295 {
1296         int rc = 0;
1297         struct obd_device *obd = exp->exp_obd;
1298         ENTRY;
1299
1300         if (obd == NULL)
1301                 RETURN(-EINVAL);
1302
1303         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1304         OBD_COUNTER_INCREMENT(obd, statfs);
1305
1306         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
1307                obd->obd_osfs_age, max_age);
1308         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1309                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1310                 if (rc == 0) {
1311                         spin_lock(&obd->obd_osfs_lock);
1312                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1313                         obd->obd_osfs_age = cfs_time_current_64();
1314                         spin_unlock(&obd->obd_osfs_lock);
1315                 }
1316         } else {
1317                 CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
1318                        " objects "LPU64"/"LPU64"\n",
1319                        obd->obd_name, &obd->obd_osfs,
1320                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1321                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1322                 spin_lock(&obd->obd_osfs_lock);
1323                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1324                 spin_unlock(&obd->obd_osfs_lock);
1325         }
1326         RETURN(rc);
1327 }
1328
1329 static inline int obd_sync_rqset(struct obd_export *exp, struct obd_info *oinfo,
1330                                  obd_size start, obd_size end)
1331 {
1332         struct ptlrpc_request_set *set = NULL;
1333         int rc;
1334         ENTRY;
1335
1336         OBD_CHECK_DT_OP(exp->exp_obd, sync, -EOPNOTSUPP);
1337         EXP_COUNTER_INCREMENT(exp, sync);
1338
1339         set =  ptlrpc_prep_set();
1340         if (set == NULL)
1341                 RETURN(-ENOMEM);
1342
1343         rc = OBP(exp->exp_obd, sync)(NULL, exp, oinfo, start, end, set);
1344         if (rc == 0)
1345                 rc = ptlrpc_set_wait(set);
1346         ptlrpc_set_destroy(set);
1347         RETURN(rc);
1348 }
1349
1350 static inline int obd_sync(const struct lu_env *env, struct obd_export *exp,
1351                            struct obd_info *oinfo, obd_size start, obd_size end,
1352                            struct ptlrpc_request_set *set)
1353 {
1354         int rc;
1355         ENTRY;
1356
1357         OBD_CHECK_DT_OP(exp->exp_obd, sync, -EOPNOTSUPP);
1358         EXP_COUNTER_INCREMENT(exp, sync);
1359
1360         rc = OBP(exp->exp_obd, sync)(env, exp, oinfo, start, end, set);
1361         RETURN(rc);
1362 }
1363
1364 static inline int obd_punch_rqset(struct obd_export *exp,
1365                                   struct obd_info *oinfo,
1366                                   struct obd_trans_info *oti)
1367 {
1368         struct ptlrpc_request_set *set = NULL;
1369         int rc;
1370         ENTRY;
1371
1372         EXP_CHECK_DT_OP(exp, punch);
1373         EXP_COUNTER_INCREMENT(exp, punch);
1374
1375         set =  ptlrpc_prep_set();
1376         if (set == NULL)
1377                 RETURN(-ENOMEM);
1378
1379         rc = OBP(exp->exp_obd, punch)(NULL, exp, oinfo, oti, set);
1380         if (rc == 0)
1381                 rc = ptlrpc_set_wait(set);
1382         ptlrpc_set_destroy(set);
1383         RETURN(rc);
1384 }
1385
1386 static inline int obd_punch(const struct lu_env *env, struct obd_export *exp,
1387                             struct obd_info *oinfo, struct obd_trans_info *oti,
1388                             struct ptlrpc_request_set *rqset)
1389 {
1390         int rc;
1391         ENTRY;
1392
1393         EXP_CHECK_DT_OP(exp, punch);
1394         EXP_COUNTER_INCREMENT(exp, punch);
1395
1396         rc = OBP(exp->exp_obd, punch)(env, exp, oinfo, oti, rqset);
1397         RETURN(rc);
1398 }
1399
1400 static inline int obd_brw(int cmd, struct obd_export *exp,
1401                           struct obd_info *oinfo, obd_count oa_bufs,
1402                           struct brw_page *pg, struct obd_trans_info *oti)
1403 {
1404         int rc;
1405         ENTRY;
1406
1407         EXP_CHECK_DT_OP(exp, brw);
1408         EXP_COUNTER_INCREMENT(exp, brw);
1409
1410         if (!(cmd & (OBD_BRW_RWMASK | OBD_BRW_CHECK))) {
1411                 CERROR("obd_brw: cmd must be OBD_BRW_READ, OBD_BRW_WRITE, "
1412                        "or OBD_BRW_CHECK\n");
1413                 LBUG();
1414         }
1415
1416         rc = OBP(exp->exp_obd, brw)(cmd, exp, oinfo, oa_bufs, pg, oti);
1417         RETURN(rc);
1418 }
1419
1420 static inline int obd_preprw(const struct lu_env *env, int cmd,
1421                              struct obd_export *exp, struct obdo *oa,
1422                              int objcount, struct obd_ioobj *obj,
1423                              struct niobuf_remote *remote, int *pages,
1424                              struct niobuf_local *local,
1425                              struct obd_trans_info *oti,
1426                              struct lustre_capa *capa)
1427 {
1428         int rc;
1429         ENTRY;
1430
1431         EXP_CHECK_DT_OP(exp, preprw);
1432         EXP_COUNTER_INCREMENT(exp, preprw);
1433
1434         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1435                                        pages, local, oti, capa);
1436         RETURN(rc);
1437 }
1438
1439 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1440                                struct obd_export *exp, struct obdo *oa,
1441                                int objcount, struct obd_ioobj *obj,
1442                                struct niobuf_remote *rnb, int pages,
1443                                struct niobuf_local *local,
1444                                struct obd_trans_info *oti, int rc)
1445 {
1446         ENTRY;
1447
1448         EXP_CHECK_DT_OP(exp, commitrw);
1449         EXP_COUNTER_INCREMENT(exp, commitrw);
1450
1451         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1452                                          rnb, pages, local, oti, rc);
1453         RETURN(rc);
1454 }
1455
1456 static inline int obd_merge_lvb(struct obd_export *exp,
1457                                 struct lov_stripe_md *lsm,
1458                                 struct ost_lvb *lvb, int kms_only)
1459 {
1460         int rc;
1461         ENTRY;
1462
1463         EXP_CHECK_DT_OP(exp, merge_lvb);
1464         EXP_COUNTER_INCREMENT(exp, merge_lvb);
1465
1466         rc = OBP(exp->exp_obd, merge_lvb)(exp, lsm, lvb, kms_only);
1467         RETURN(rc);
1468 }
1469
1470 static inline int obd_adjust_kms(struct obd_export *exp,
1471                                  struct lov_stripe_md *lsm, obd_off size,
1472                                  int shrink)
1473 {
1474         int rc;
1475         ENTRY;
1476
1477         EXP_CHECK_DT_OP(exp, adjust_kms);
1478         EXP_COUNTER_INCREMENT(exp, adjust_kms);
1479
1480         rc = OBP(exp->exp_obd, adjust_kms)(exp, lsm, size, shrink);
1481         RETURN(rc);
1482 }
1483
1484 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1485                                 int len, void *karg, void *uarg)
1486 {
1487         int rc;
1488         ENTRY;
1489
1490         EXP_CHECK_DT_OP(exp, iocontrol);
1491         EXP_COUNTER_INCREMENT(exp, iocontrol);
1492
1493         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1494         RETURN(rc);
1495 }
1496
1497 static inline int obd_enqueue_rqset(struct obd_export *exp,
1498                                     struct obd_info *oinfo,
1499                                     struct ldlm_enqueue_info *einfo)
1500 {
1501         struct ptlrpc_request_set *set = NULL;
1502         int rc;
1503         ENTRY;
1504
1505         EXP_CHECK_DT_OP(exp, enqueue);
1506         EXP_COUNTER_INCREMENT(exp, enqueue);
1507
1508         set =  ptlrpc_prep_set();
1509         if (set == NULL)
1510                 RETURN(-ENOMEM);
1511
1512         rc = OBP(exp->exp_obd, enqueue)(exp, oinfo, einfo, set);
1513         if (rc == 0)
1514                 rc = ptlrpc_set_wait(set);
1515         ptlrpc_set_destroy(set);
1516         RETURN(rc);
1517 }
1518
1519 static inline int obd_enqueue(struct obd_export *exp,
1520                               struct obd_info *oinfo,
1521                               struct ldlm_enqueue_info *einfo,
1522                               struct ptlrpc_request_set *set)
1523 {
1524         int rc;
1525         ENTRY;
1526
1527         EXP_CHECK_DT_OP(exp, enqueue);
1528         EXP_COUNTER_INCREMENT(exp, enqueue);
1529
1530         rc = OBP(exp->exp_obd, enqueue)(exp, oinfo, einfo, set);
1531         RETURN(rc);
1532 }
1533
1534 static inline int obd_change_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, change_cbdata);
1542         EXP_COUNTER_INCREMENT(exp, change_cbdata);
1543
1544         rc = OBP(exp->exp_obd, change_cbdata)(exp, lsm, it, data);
1545         RETURN(rc);
1546 }
1547
1548 static inline int obd_find_cbdata(struct obd_export *exp,
1549                                   struct lov_stripe_md *lsm,
1550                                   ldlm_iterator_t it, void *data)
1551 {
1552         int rc;
1553         ENTRY;
1554
1555         EXP_CHECK_DT_OP(exp, find_cbdata);
1556         EXP_COUNTER_INCREMENT(exp, find_cbdata);
1557
1558         rc = OBP(exp->exp_obd, find_cbdata)(exp, lsm, it, data);
1559         RETURN(rc);
1560 }
1561
1562 static inline int obd_cancel(struct obd_export *exp,
1563                              struct lov_stripe_md *ea, __u32 mode,
1564                              struct lustre_handle *lockh)
1565 {
1566         int rc;
1567         ENTRY;
1568
1569         EXP_CHECK_DT_OP(exp, cancel);
1570         EXP_COUNTER_INCREMENT(exp, cancel);
1571
1572         rc = OBP(exp->exp_obd, cancel)(exp, ea, mode, lockh);
1573         RETURN(rc);
1574 }
1575
1576 static inline int obd_cancel_unused(struct obd_export *exp,
1577                                     struct lov_stripe_md *ea,
1578                                     ldlm_cancel_flags_t flags,
1579                                     void *opaque)
1580 {
1581         int rc;
1582         ENTRY;
1583
1584         EXP_CHECK_DT_OP(exp, cancel_unused);
1585         EXP_COUNTER_INCREMENT(exp, cancel_unused);
1586
1587         rc = OBP(exp->exp_obd, cancel_unused)(exp, ea, flags, opaque);
1588         RETURN(rc);
1589 }
1590
1591 static inline int obd_pin(struct obd_export *exp, const struct lu_fid *fid,
1592                           struct obd_capa *oc, struct obd_client_handle *handle,
1593                           int flag)
1594 {
1595         int rc;
1596         ENTRY;
1597
1598         EXP_CHECK_DT_OP(exp, pin);
1599         EXP_COUNTER_INCREMENT(exp, pin);
1600
1601         rc = OBP(exp->exp_obd, pin)(exp, fid, oc, handle, flag);
1602         RETURN(rc);
1603 }
1604
1605 static inline int obd_unpin(struct obd_export *exp,
1606                             struct obd_client_handle *handle, int flag)
1607 {
1608         int rc;
1609         ENTRY;
1610
1611         EXP_CHECK_DT_OP(exp, unpin);
1612         EXP_COUNTER_INCREMENT(exp, unpin);
1613
1614         rc = OBP(exp->exp_obd, unpin)(exp, handle, flag);
1615         RETURN(rc);
1616 }
1617
1618
1619 static inline void obd_import_event(struct obd_device *obd,
1620                                     struct obd_import *imp,
1621                                     enum obd_import_event event)
1622 {
1623         ENTRY;
1624         if (!obd) {
1625                 CERROR("NULL device\n");
1626                 EXIT;
1627                 return;
1628         }
1629         if (obd->obd_set_up && OBP(obd, import_event)) {
1630                 OBD_COUNTER_INCREMENT(obd, import_event);
1631                 OBP(obd, import_event)(obd, imp, event);
1632         }
1633         EXIT;
1634 }
1635
1636 static inline int obd_llog_connect(struct obd_export *exp,
1637                                    struct llogd_conn_body *body)
1638 {
1639         int rc;
1640         ENTRY;
1641
1642         OBD_CHECK_DT_OP(exp->exp_obd, llog_connect, 0);
1643         EXP_COUNTER_INCREMENT(exp, llog_connect);
1644
1645         rc = OBP(exp->exp_obd, llog_connect)(exp, body);
1646         RETURN(rc);
1647 }
1648
1649
1650 static inline int obd_notify(struct obd_device *obd,
1651                              struct obd_device *watched,
1652                              enum obd_notify_event ev,
1653                              void *data)
1654 {
1655         int rc;
1656         ENTRY;
1657         OBD_CHECK_DEV(obd);
1658
1659         /* the check for async_recov is a complete hack - I'm hereby
1660            overloading the meaning to also mean "this was called from
1661            mds_postsetup".  I know that my mds is able to handle notifies
1662            by this point, and it needs to get them to execute mds_postrecov. */
1663         if (!obd->obd_set_up && !obd->obd_async_recov) {
1664                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1665                 RETURN(-EINVAL);
1666         }
1667
1668         if (!OBP(obd, notify)) {
1669                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1670                 RETURN(-ENOSYS);
1671         }
1672
1673         OBD_COUNTER_INCREMENT(obd, notify);
1674         rc = OBP(obd, notify)(obd, watched, ev, data);
1675         RETURN(rc);
1676 }
1677
1678 static inline int obd_notify_observer(struct obd_device *observer,
1679                                       struct obd_device *observed,
1680                                       enum obd_notify_event ev,
1681                                       void *data)
1682 {
1683         int rc1;
1684         int rc2;
1685
1686         struct obd_notify_upcall *onu;
1687
1688         if (observer->obd_observer)
1689                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1690         else
1691                 rc1 = 0;
1692         /*
1693          * Also, call non-obd listener, if any
1694          */
1695         onu = &observer->obd_upcall;
1696         if (onu->onu_upcall != NULL)
1697                 rc2 = onu->onu_upcall(observer, observed, ev,
1698                                       onu->onu_owner, NULL);
1699         else
1700                 rc2 = 0;
1701
1702         return rc1 ? rc1 : rc2;
1703 }
1704
1705 static inline int obd_quotacheck(struct obd_export *exp,
1706                                  struct obd_quotactl *oqctl)
1707 {
1708         int rc;
1709         ENTRY;
1710
1711         EXP_CHECK_DT_OP(exp, quotacheck);
1712         EXP_COUNTER_INCREMENT(exp, quotacheck);
1713
1714         rc = OBP(exp->exp_obd, quotacheck)(exp->exp_obd, exp, oqctl);
1715         RETURN(rc);
1716 }
1717
1718 static inline int obd_quotactl(struct obd_export *exp,
1719                                struct obd_quotactl *oqctl)
1720 {
1721         int rc;
1722         ENTRY;
1723
1724         EXP_CHECK_DT_OP(exp, quotactl);
1725         EXP_COUNTER_INCREMENT(exp, quotactl);
1726
1727         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1728         RETURN(rc);
1729 }
1730
1731 static inline int obd_health_check(const struct lu_env *env,
1732                                    struct obd_device *obd)
1733 {
1734         /* returns: 0 on healthy
1735          *         >0 on unhealthy + reason code/flag
1736          *            however the only suppored reason == 1 right now
1737          *            We'll need to define some better reasons
1738          *            or flags in the future.
1739          *         <0 on error
1740          */
1741         int rc;
1742         ENTRY;
1743
1744         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1745         if (obd == NULL || !OBT(obd)) {
1746                 CERROR("cleaned up obd\n");
1747                 RETURN(-EOPNOTSUPP);
1748         }
1749         if (!obd->obd_set_up || obd->obd_stopping)
1750                 RETURN(0);
1751         if (!OBP(obd, health_check))
1752                 RETURN(0);
1753
1754         rc = OBP(obd, health_check)(env, obd);
1755         RETURN(rc);
1756 }
1757
1758 static inline int obd_register_observer(struct obd_device *obd,
1759                                         struct obd_device *observer)
1760 {
1761         ENTRY;
1762         OBD_CHECK_DEV(obd);
1763         down_write(&obd->obd_observer_link_sem);
1764         if (obd->obd_observer && observer) {
1765                 up_write(&obd->obd_observer_link_sem);
1766                 RETURN(-EALREADY);
1767         }
1768         obd->obd_observer = observer;
1769         up_write(&obd->obd_observer_link_sem);
1770         RETURN(0);
1771 }
1772
1773 static inline int obd_pin_observer(struct obd_device *obd,
1774                                    struct obd_device **observer)
1775 {
1776         ENTRY;
1777         down_read(&obd->obd_observer_link_sem);
1778         if (!obd->obd_observer) {
1779                 *observer = NULL;
1780                 up_read(&obd->obd_observer_link_sem);
1781                 RETURN(-ENOENT);
1782         }
1783         *observer = obd->obd_observer;
1784         RETURN(0);
1785 }
1786
1787 static inline int obd_unpin_observer(struct obd_device *obd)
1788 {
1789         ENTRY;
1790         up_read(&obd->obd_observer_link_sem);
1791         RETURN(0);
1792 }
1793
1794 #if 0
1795 static inline int obd_register_page_removal_cb(struct obd_export *exp,
1796                                                obd_page_removal_cb_t cb,
1797                                                obd_pin_extent_cb pin_cb)
1798 {
1799         int rc;
1800         ENTRY;
1801
1802         OBD_CHECK_DT_OP(exp->exp_obd, register_page_removal_cb, 0);
1803         OBD_COUNTER_INCREMENT(exp->exp_obd, register_page_removal_cb);
1804
1805         rc = OBP(exp->exp_obd, register_page_removal_cb)(exp, cb, pin_cb);
1806         RETURN(rc);
1807 }
1808
1809 static inline int obd_unregister_page_removal_cb(struct obd_export *exp,
1810                                                  obd_page_removal_cb_t cb)
1811 {
1812         int rc;
1813         ENTRY;
1814
1815         OBD_CHECK_DT_OP(exp->exp_obd, unregister_page_removal_cb, 0);
1816         OBD_COUNTER_INCREMENT(exp->exp_obd, unregister_page_removal_cb);
1817
1818         rc = OBP(exp->exp_obd, unregister_page_removal_cb)(exp, cb);
1819         RETURN(rc);
1820 }
1821
1822 static inline int obd_register_lock_cancel_cb(struct obd_export *exp,
1823                                               obd_lock_cancel_cb cb)
1824 {
1825         int rc;
1826         ENTRY;
1827
1828         OBD_CHECK_DT_OP(exp->exp_obd, register_lock_cancel_cb, 0);
1829         OBD_COUNTER_INCREMENT(exp->exp_obd, register_lock_cancel_cb);
1830
1831         rc = OBP(exp->exp_obd, register_lock_cancel_cb)(exp, cb);
1832         RETURN(rc);
1833 }
1834
1835 static inline int obd_unregister_lock_cancel_cb(struct obd_export *exp,
1836                                                  obd_lock_cancel_cb cb)
1837 {
1838         int rc;
1839         ENTRY;
1840
1841         OBD_CHECK_DT_OP(exp->exp_obd, unregister_lock_cancel_cb, 0);
1842         OBD_COUNTER_INCREMENT(exp->exp_obd, unregister_lock_cancel_cb);
1843
1844         rc = OBP(exp->exp_obd, unregister_lock_cancel_cb)(exp, cb);
1845         RETURN(rc);
1846 }
1847 #endif
1848
1849 /* metadata helpers */
1850 static inline int md_getstatus(struct obd_export *exp,
1851                                struct lu_fid *fid, struct obd_capa **pc)
1852 {
1853         int rc;
1854         ENTRY;
1855
1856         EXP_CHECK_MD_OP(exp, getstatus);
1857         EXP_MD_COUNTER_INCREMENT(exp, getstatus);
1858         rc = MDP(exp->exp_obd, getstatus)(exp, fid, pc);
1859         RETURN(rc);
1860 }
1861
1862 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1863                              struct ptlrpc_request **request)
1864 {
1865         int rc;
1866         ENTRY;
1867         EXP_CHECK_MD_OP(exp, getattr);
1868         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1869         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1870         RETURN(rc);
1871 }
1872
1873 static inline int md_change_cbdata(struct obd_export *exp,
1874                                    const struct lu_fid *fid,
1875                                    ldlm_iterator_t it, void *data)
1876 {
1877         int rc;
1878         ENTRY;
1879         EXP_CHECK_MD_OP(exp, change_cbdata);
1880         EXP_MD_COUNTER_INCREMENT(exp, change_cbdata);
1881         rc = MDP(exp->exp_obd, change_cbdata)(exp, fid, it, data);
1882         RETURN(rc);
1883 }
1884
1885 static inline int md_find_cbdata(struct obd_export *exp,
1886                                  const struct lu_fid *fid,
1887                                  ldlm_iterator_t it, void *data)
1888 {
1889         int rc;
1890         ENTRY;
1891         EXP_CHECK_MD_OP(exp, find_cbdata);
1892         EXP_MD_COUNTER_INCREMENT(exp, find_cbdata);
1893         rc = MDP(exp->exp_obd, find_cbdata)(exp, fid, it, data);
1894         RETURN(rc);
1895 }
1896
1897 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1898                            struct md_open_data *mod,
1899                            struct ptlrpc_request **request)
1900 {
1901         int rc;
1902         ENTRY;
1903         EXP_CHECK_MD_OP(exp, close);
1904         EXP_MD_COUNTER_INCREMENT(exp, close);
1905         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1906         RETURN(rc);
1907 }
1908
1909 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1910                             const void *data, int datalen, int mode, __u32 uid,
1911                             __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1912                             struct ptlrpc_request **request)
1913 {
1914         int rc;
1915         ENTRY;
1916         EXP_CHECK_MD_OP(exp, create);
1917         EXP_MD_COUNTER_INCREMENT(exp, create);
1918         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1919                                        uid, gid, cap_effective, rdev, request);
1920         RETURN(rc);
1921 }
1922
1923 static inline int md_done_writing(struct obd_export *exp,
1924                                   struct md_op_data *op_data,
1925                                   struct md_open_data *mod)
1926 {
1927         int rc;
1928         ENTRY;
1929         EXP_CHECK_MD_OP(exp, done_writing);
1930         EXP_MD_COUNTER_INCREMENT(exp, done_writing);
1931         rc = MDP(exp->exp_obd, done_writing)(exp, op_data, mod);
1932         RETURN(rc);
1933 }
1934
1935 static inline int md_enqueue(struct obd_export *exp,
1936                              struct ldlm_enqueue_info *einfo,
1937                              struct lookup_intent *it,
1938                              struct md_op_data *op_data,
1939                              struct lustre_handle *lockh,
1940                              void *lmm, int lmmsize,
1941                              struct ptlrpc_request **req,
1942                              int extra_lock_flags)
1943 {
1944         int rc;
1945         ENTRY;
1946         EXP_CHECK_MD_OP(exp, enqueue);
1947         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1948         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, it, op_data, lockh,
1949                                         lmm, lmmsize, req, extra_lock_flags);
1950         RETURN(rc);
1951 }
1952
1953 static inline int md_getattr_name(struct obd_export *exp,
1954                                   struct md_op_data *op_data,
1955                                   struct ptlrpc_request **request)
1956 {
1957         int rc;
1958         ENTRY;
1959         EXP_CHECK_MD_OP(exp, getattr_name);
1960         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1961         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1962         RETURN(rc);
1963 }
1964
1965 static inline int md_intent_lock(struct obd_export *exp,
1966                                  struct md_op_data *op_data, void *lmm,
1967                                  int lmmsize, struct lookup_intent *it,
1968                                  int lookup_flags, struct ptlrpc_request **reqp,
1969                                  ldlm_blocking_callback cb_blocking,
1970                                  __u64 extra_lock_flags)
1971 {
1972         int rc;
1973         ENTRY;
1974         EXP_CHECK_MD_OP(exp, intent_lock);
1975         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1976         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, lmm, lmmsize,
1977                                             it, lookup_flags, reqp, cb_blocking,
1978                                             extra_lock_flags);
1979         RETURN(rc);
1980 }
1981
1982 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1983                           struct ptlrpc_request **request)
1984 {
1985         int rc;
1986         ENTRY;
1987         EXP_CHECK_MD_OP(exp, link);
1988         EXP_MD_COUNTER_INCREMENT(exp, link);
1989         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1990         RETURN(rc);
1991 }
1992
1993 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1994                             const char *old, int oldlen, const char *new,
1995                             int newlen, struct ptlrpc_request **request)
1996 {
1997         int rc;
1998         ENTRY;
1999         EXP_CHECK_MD_OP(exp, rename);
2000         EXP_MD_COUNTER_INCREMENT(exp, rename);
2001         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
2002                                        newlen, request);
2003         RETURN(rc);
2004 }
2005
2006 static inline int md_is_subdir(struct obd_export *exp,
2007                                const struct lu_fid *pfid,
2008                                const struct lu_fid *cfid,
2009                                struct ptlrpc_request **request)
2010 {
2011         int rc;
2012         ENTRY;
2013         EXP_CHECK_MD_OP(exp, is_subdir);
2014         EXP_MD_COUNTER_INCREMENT(exp, is_subdir);
2015         rc = MDP(exp->exp_obd, is_subdir)(exp, pfid, cfid, request);
2016         RETURN(rc);
2017 }
2018
2019 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
2020                              void *ea, int ealen, void *ea2, int ea2len,
2021                              struct ptlrpc_request **request,
2022                              struct md_open_data **mod)
2023 {
2024         int rc;
2025         ENTRY;
2026         EXP_CHECK_MD_OP(exp, setattr);
2027         EXP_MD_COUNTER_INCREMENT(exp, setattr);
2028         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen,
2029                                         ea2, ea2len, request, mod);
2030         RETURN(rc);
2031 }
2032
2033 static inline int md_sync(struct obd_export *exp, const struct lu_fid *fid,
2034                           struct obd_capa *oc, struct ptlrpc_request **request)
2035 {
2036         int rc;
2037         ENTRY;
2038         EXP_CHECK_MD_OP(exp, sync);
2039         EXP_MD_COUNTER_INCREMENT(exp, sync);
2040         rc = MDP(exp->exp_obd, sync)(exp, fid, oc, request);
2041         RETURN(rc);
2042 }
2043
2044 static inline int md_readpage(struct obd_export *exp, struct md_op_data *opdata,
2045                               struct page **pages,
2046                               struct ptlrpc_request **request)
2047 {
2048         int rc;
2049         ENTRY;
2050         EXP_CHECK_MD_OP(exp, readpage);
2051         EXP_MD_COUNTER_INCREMENT(exp, readpage);
2052         rc = MDP(exp->exp_obd, readpage)(exp, opdata, pages, request);
2053         RETURN(rc);
2054 }
2055
2056 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
2057                             struct ptlrpc_request **request)
2058 {
2059         int rc;
2060         ENTRY;
2061         EXP_CHECK_MD_OP(exp, unlink);
2062         EXP_MD_COUNTER_INCREMENT(exp, unlink);
2063         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
2064         RETURN(rc);
2065 }
2066
2067 static inline int md_get_lustre_md(struct obd_export *exp,
2068                                    struct ptlrpc_request *req,
2069                                    struct obd_export *dt_exp,
2070                                    struct obd_export *md_exp,
2071                                    struct lustre_md *md)
2072 {
2073         ENTRY;
2074         EXP_CHECK_MD_OP(exp, get_lustre_md);
2075         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
2076         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
2077 }
2078
2079 static inline int md_free_lustre_md(struct obd_export *exp,
2080                                     struct lustre_md *md)
2081 {
2082         ENTRY;
2083         EXP_CHECK_MD_OP(exp, free_lustre_md);
2084         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
2085         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
2086 }
2087
2088 static inline int md_setxattr(struct obd_export *exp,
2089                               const struct lu_fid *fid, struct obd_capa *oc,
2090                               obd_valid valid, const char *name,
2091                               const char *input, int input_size,
2092                               int output_size, int flags, __u32 suppgid,
2093                               struct ptlrpc_request **request)
2094 {
2095         ENTRY;
2096         EXP_CHECK_MD_OP(exp, setxattr);
2097         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
2098         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, oc, valid, name, input,
2099                                            input_size, output_size, flags,
2100                                            suppgid, request));
2101 }
2102
2103 static inline int md_getxattr(struct obd_export *exp,
2104                               const struct lu_fid *fid, struct obd_capa *oc,
2105                               obd_valid valid, const char *name,
2106                               const char *input, int input_size,
2107                               int output_size, int flags,
2108                               struct ptlrpc_request **request)
2109 {
2110         ENTRY;
2111         EXP_CHECK_MD_OP(exp, getxattr);
2112         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
2113         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, oc, valid, name, input,
2114                                            input_size, output_size, flags,
2115                                            request));
2116 }
2117
2118 static inline int md_set_open_replay_data(struct obd_export *exp,
2119                                           struct obd_client_handle *och,
2120                                           struct ptlrpc_request *open_req)
2121 {
2122         ENTRY;
2123         EXP_CHECK_MD_OP(exp, set_open_replay_data);
2124         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
2125         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, open_req));
2126 }
2127
2128 static inline int md_clear_open_replay_data(struct obd_export *exp,
2129                                             struct obd_client_handle *och)
2130 {
2131         ENTRY;
2132         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
2133         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
2134         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
2135 }
2136
2137 static inline int md_set_lock_data(struct obd_export *exp,
2138                                    __u64 *lockh, void *data, __u64 *bits)
2139 {
2140         ENTRY;
2141         EXP_CHECK_MD_OP(exp, set_lock_data);
2142         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
2143         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
2144 }
2145
2146 static inline int md_cancel_unused(struct obd_export *exp,
2147                                    const struct lu_fid *fid,
2148                                    ldlm_policy_data_t *policy,
2149                                    ldlm_mode_t mode,
2150                                    ldlm_cancel_flags_t flags,
2151                                    void *opaque)
2152 {
2153         int rc;
2154         ENTRY;
2155
2156         EXP_CHECK_MD_OP(exp, cancel_unused);
2157         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
2158
2159         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
2160                                               flags, opaque);
2161         RETURN(rc);
2162 }
2163
2164 static inline ldlm_mode_t md_lock_match(struct obd_export *exp, __u64 flags,
2165                                         const struct lu_fid *fid,
2166                                         ldlm_type_t type,
2167                                         ldlm_policy_data_t *policy,
2168                                         ldlm_mode_t mode,
2169                                         struct lustre_handle *lockh)
2170 {
2171         ENTRY;
2172         EXP_CHECK_MD_OP(exp, lock_match);
2173         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
2174         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
2175                                              policy, mode, lockh));
2176 }
2177
2178 static inline int md_init_ea_size(struct obd_export *exp, int easize,
2179                                   int def_asize, int cookiesize)
2180 {
2181         ENTRY;
2182         EXP_CHECK_MD_OP(exp, init_ea_size);
2183         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
2184         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, easize, def_asize,
2185                                                cookiesize));
2186 }
2187
2188 static inline int md_get_remote_perm(struct obd_export *exp,
2189                                      const struct lu_fid *fid,
2190                                      struct obd_capa *oc, __u32 suppgid,
2191                                      struct ptlrpc_request **request)
2192 {
2193         ENTRY;
2194         EXP_CHECK_MD_OP(exp, get_remote_perm);
2195         EXP_MD_COUNTER_INCREMENT(exp, get_remote_perm);
2196         RETURN(MDP(exp->exp_obd, get_remote_perm)(exp, fid, oc, suppgid,
2197                                                   request));
2198 }
2199
2200 static inline int md_renew_capa(struct obd_export *exp, struct obd_capa *ocapa,
2201                                 renew_capa_cb_t cb)
2202 {
2203         int rc;
2204         ENTRY;
2205         EXP_CHECK_MD_OP(exp, renew_capa);
2206         EXP_MD_COUNTER_INCREMENT(exp, renew_capa);
2207         rc = MDP(exp->exp_obd, renew_capa)(exp, ocapa, cb);
2208         RETURN(rc);
2209 }
2210
2211 static inline int md_unpack_capa(struct obd_export *exp,
2212                                  struct ptlrpc_request *req,
2213                                  const struct req_msg_field *field,
2214                                  struct obd_capa **oc)
2215 {
2216         int rc;
2217         ENTRY;
2218         EXP_CHECK_MD_OP(exp, unpack_capa);
2219         EXP_MD_COUNTER_INCREMENT(exp, unpack_capa);
2220         rc = MDP(exp->exp_obd, unpack_capa)(exp, req, field, oc);
2221         RETURN(rc);
2222 }
2223
2224 static inline int md_intent_getattr_async(struct obd_export *exp,
2225                                           struct md_enqueue_info *minfo,
2226                                           struct ldlm_enqueue_info *einfo)
2227 {
2228         int rc;
2229         ENTRY;
2230         EXP_CHECK_MD_OP(exp, intent_getattr_async);
2231         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
2232         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo, einfo);
2233         RETURN(rc);
2234 }
2235
2236 static inline int md_revalidate_lock(struct obd_export *exp,
2237                                      struct lookup_intent *it,
2238                                      struct lu_fid *fid, __u64 *bits)
2239 {
2240         int rc;
2241         ENTRY;
2242         EXP_CHECK_MD_OP(exp, revalidate_lock);
2243         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
2244         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
2245         RETURN(rc);
2246 }
2247
2248
2249 /* OBD Metadata Support */
2250
2251 extern int obd_init_caches(void);
2252 extern void obd_cleanup_caches(void);
2253
2254 /* support routines */
2255 extern cfs_mem_cache_t *obdo_cachep;
2256
2257 #define OBDO_ALLOC(ptr)                                                       \
2258 do {                                                                          \
2259         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, CFS_ALLOC_IO);             \
2260 } while(0)
2261
2262 #define OBDO_FREE(ptr)                                                        \
2263 do {                                                                          \
2264         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
2265 } while(0)
2266
2267
2268 static inline void obdo2fid(struct obdo *oa, struct lu_fid *fid)
2269 {
2270         /* something here */
2271 }
2272
2273 static inline void fid2obdo(struct lu_fid *fid, struct obdo *oa)
2274 {
2275         /* something here */
2276 }
2277
2278 typedef int (*register_lwp_cb)(void *data);
2279
2280 struct lwp_register_item {
2281         struct obd_export **lri_exp;
2282         register_lwp_cb     lri_cb_func;
2283         void               *lri_cb_data;
2284         cfs_list_t          lri_list;
2285         char                lri_name[MTI_NAME_MAXLEN];
2286 };
2287
2288 /* I'm as embarrassed about this as you are.
2289  *
2290  * <shaver> // XXX do not look into _superhack with remaining eye
2291  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
2292 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
2293
2294 /* obd_mount.c */
2295 int server_name2fsname(char *svname, char *fsname, char **endptr);
2296 int lustre_register_lwp_item(char *lwpname, struct obd_export **exp,
2297                              register_lwp_cb cb_func, void *cb_data);
2298 void lustre_deregister_lwp_item(struct obd_export **exp);
2299 int tgt_name2lwpname(char *tgt_name, char *lwp_name);
2300
2301 /* sysctl.c */
2302 extern void obd_sysctl_init (void);
2303 extern void obd_sysctl_clean (void);
2304
2305 /* uuid.c  */
2306 typedef __u8 class_uuid_t[16];
2307 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
2308
2309 /* lustre_peer.c    */
2310 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
2311 int class_add_uuid(const char *uuid, __u64 nid);
2312 int class_del_uuid (const char *uuid);
2313 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
2314 void class_init_uuidlist(void);
2315 void class_exit_uuidlist(void);
2316
2317 /* mea.c */
2318 int mea_name2idx(struct lmv_stripe_md *mea, const char *name, int namelen);
2319 int raw_name2idx(int hashtype, int count, const char *name, int namelen);
2320
2321 /* prng.c */
2322 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
2323
2324 #endif /* __LINUX_OBD_CLASS_H */