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, 2013, 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
  40 #include <obd_support.h>
  41 #include <lustre_import.h>
  42 #include <lustre_net.h>
  43 #include <obd.h>
  44 #include <lustre_lib.h>
  45 #include <lustre/lustre_idl.h>
  46 #include <lprocfs_status.h>
  47
  48 #define OBD_STATFS_NODELAY      0x0001  /* requests should be send without delay
  49                                          * and resends for avoid deadlocks */
  50 #define OBD_STATFS_FROM_CACHE   0x0002  /* the statfs callback should not update
  51                                          * obd_osfs_age */
  52 #define OBD_STATFS_PTLRPCD      0x0004  /* requests will be sent via ptlrpcd
  53                                          * instead of a specific set. This
  54                                          * means that we cannot rely on the set
  55                                          * interpret routine to be called.
  56                                          * lov_statfs_fini() must thus be called
  57                                          * by the request interpret routine */
  58 #define OBD_STATFS_FOR_MDT0     0x0008  /* The statfs is only for retrieving
  59                                          * information from MDT0. */
  60
  61 /* OBD Device Declarations */
  62 extern struct obd_device *obd_devs[MAX_OBD_DEVICES];
  63 extern struct list_head obd_types;
  64 extern spinlock_t obd_types_lock;
  65 extern rwlock_t obd_dev_lock;
  66
  67 /* OBD Operations Declarations */
  68 extern struct obd_device *class_conn2obd(struct lustre_handle *);
  69 extern struct obd_device *class_exp2obd(struct obd_export *);
  70 extern int class_handle_ioctl(unsigned int cmd, unsigned long arg);
  71 extern int lustre_get_jobid(char *jobid);
  72
  73 struct lu_device_type;
  74
  75 /* genops.c */
  76 struct obd_export *class_conn2export(struct lustre_handle *);
  77 int class_register_type(struct obd_ops *, struct md_ops *, bool enable_proc,
  78                         struct lprocfs_vars *module_vars,
  79                         const char *nm, struct lu_device_type *ldt);
  80 int class_unregister_type(const char *nm);
  81
  82 struct obd_device *class_newdev(const char *type_name, const char *name);
  83 void class_release_dev(struct obd_device *obd);
  84
  85 int class_name2dev(const char *name);
  86 struct obd_device *class_name2obd(const char *name);
  87 int class_uuid2dev(struct obd_uuid *uuid);
  88 struct obd_device *class_uuid2obd(struct obd_uuid *uuid);
  89 void class_obd_list(void);
  90 struct obd_device * class_find_client_obd(struct obd_uuid *tgt_uuid,
  91                                           const char * typ_name,
  92                                           struct obd_uuid *grp_uuid);
  93 struct obd_device * class_devices_in_group(struct obd_uuid *grp_uuid,
  94                                            int *next);
  95 struct obd_device * class_num2obd(int num);
  96 int get_devices_count(void);
  97
  98 int class_notify_sptlrpc_conf(const char *fsname, int namelen);
  99
 100 char *obd_export_nid2str(struct obd_export *exp);
 101
 102 int obd_export_evict_by_nid(struct obd_device *obd, const char *nid);
 103 int obd_export_evict_by_uuid(struct obd_device *obd, const char *uuid);
 104 int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep);
 105
 106 int obd_zombie_impexp_init(void);
 107 void obd_zombie_impexp_stop(void);
 108 void obd_zombie_impexp_cull(void);
 109 void obd_zombie_barrier(void);
 110 void obd_exports_barrier(struct obd_device *obd);
 111 int kuc_len(int payload_len);
 112 struct kuc_hdr * kuc_ptr(void *p);
 113 int kuc_ispayload(void *p);
 114 void *kuc_alloc(int payload_len, int transport, int type);
 115 void kuc_free(void *p, int payload_len);
 116 int obd_get_request_slot(struct client_obd *cli);
 117 void obd_put_request_slot(struct client_obd *cli);
 118 __u32 obd_get_max_rpcs_in_flight(struct client_obd *cli);
 119 int obd_set_max_rpcs_in_flight(struct client_obd *cli, __u32 max);
 120
 121 struct llog_handle;
 122 struct llog_rec_hdr;
 123 typedef int (*llog_cb_t)(const struct lu_env *, struct llog_handle *,
 124                          struct llog_rec_hdr *, void *);
 125 /* obd_config.c */
 126 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
 127                                      const char *new_name);
 128 int class_process_config(struct lustre_cfg *lcfg);
 129 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 130                              struct lustre_cfg *lcfg, void *data);
 131 int class_attach(struct lustre_cfg *lcfg);
 132 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
 133 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg);
 134 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg);
 135 struct obd_device *class_incref(struct obd_device *obd,
 136                                 const char *scope, const void *source);
 137 void class_decref(struct obd_device *obd,
 138                   const char *scope, const void *source);
 139 void dump_exports(struct obd_device *obd, int locks);
 140 int class_config_llog_handler(const struct lu_env *env,
 141                               struct llog_handle *handle,
 142                               struct llog_rec_hdr *rec, void *data);
 143 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg);
 144 int class_add_uuid(const char *uuid, __u64 nid);
 145
 146 #define CFG_F_START     0x01   /* Set when we start updating from a log */
 147 #define CFG_F_MARKER    0x02   /* We are within a maker */
 148 #define CFG_F_SKIP      0x04   /* We should ignore this cfg command */
 149 #define CFG_F_COMPAT146 0x08   /* Allow old-style logs */
 150 #define CFG_F_EXCLUDE   0x10   /* OST exclusion list */
 151
 152 /* Passed as data param to class_config_parse_llog */
 153 struct config_llog_instance {
 154         char                    *cfg_obdname;
 155         void                    *cfg_instance;
 156         struct super_block      *cfg_sb;
 157         struct obd_uuid          cfg_uuid;
 158         llog_cb_t                cfg_callback;
 159         int                      cfg_last_idx; /* for partial llog processing */
 160         int                      cfg_flags;
 161         __u32                    cfg_lwp_idx;
 162 };
 163 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 164                             char *name, struct config_llog_instance *cfg);
 165 int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 166                            char *name, struct config_llog_instance *cfg);
 167
 168 enum {
 169         CONFIG_T_CONFIG  = 0,
 170         CONFIG_T_SPTLRPC = 1,
 171         CONFIG_T_RECOVER = 2,
 172         CONFIG_T_PARAMS  = 3,
 173         CONFIG_T_MAX     = 4
 174 };
 175
 176 #define PARAMS_FILENAME "params"
 177 #define LCTL_UPCALL     "lctl"
 178
 179 /* list of active configuration logs  */
 180 struct config_llog_data {
 181         struct ldlm_res_id          cld_resid;
 182         struct config_llog_instance cld_cfg;
 183         struct list_head            cld_list_chain;
 184         atomic_t                    cld_refcount;
 185         struct config_llog_data    *cld_sptlrpc;/* depended sptlrpc log */
 186         struct config_llog_data    *cld_params; /* common parameters log */
 187         struct config_llog_data    *cld_recover;/* imperative recover log */
 188         struct obd_export          *cld_mgcexp;
 189         struct mutex                cld_lock;
 190         int                         cld_type;
 191         unsigned int                cld_stopping:1, /* we were told to stop
 192                                                      * watching */
 193                                     cld_lostlock:1; /* lock not requeued */
 194         char                        cld_logname[0];
 195 };
 196
 197 struct lustre_profile {
 198         struct list_head         lp_list;
 199         char                    *lp_profile;
 200         char                    *lp_dt;
 201         char                    *lp_md;
 202 };
 203
 204 struct lustre_profile *class_get_profile(const char * prof);
 205 void class_del_profile(const char *prof);
 206 void class_del_profiles(void);
 207
 208 #if LUSTRE_TRACKS_LOCK_EXP_REFS
 209
 210 void __class_export_add_lock_ref(struct obd_export *, struct ldlm_lock *);
 211 void __class_export_del_lock_ref(struct obd_export *, struct ldlm_lock *);
 212 extern void (*class_export_dump_hook)(struct obd_export *);
 213
 214 #else
 215
 216 #define __class_export_add_lock_ref(exp, lock)             do {} while(0)
 217 #define __class_export_del_lock_ref(exp, lock)             do {} while(0)
 218
 219 #endif
 220
 221 #define class_export_rpc_inc(exp)                                       \
 222 ({                                                                      \
 223         atomic_inc(&(exp)->exp_rpc_count);                              \
 224         CDEBUG(D_INFO, "RPC GETting export %p : new rpc_count %d\n",    \
 225                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 226 })
 227
 228 #define class_export_rpc_dec(exp)                                       \
 229 ({                                                                      \
 230         LASSERT_ATOMIC_POS(&exp->exp_rpc_count);                        \
 231         atomic_dec(&(exp)->exp_rpc_count);                              \
 232         CDEBUG(D_INFO, "RPC PUTting export %p : new rpc_count %d\n",    \
 233                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 234 })
 235
 236 #define class_export_lock_get(exp, lock)                                \
 237 ({                                                                      \
 238         atomic_inc(&(exp)->exp_locks_count);                            \
 239         __class_export_add_lock_ref(exp, lock);                         \
 240         CDEBUG(D_INFO, "lock GETting export %p : new locks_count %d\n", \
 241                (exp), atomic_read(&(exp)->exp_locks_count));            \
 242         class_export_get(exp);                                          \
 243 })
 244
 245 #define class_export_lock_put(exp, lock)                                \
 246 ({                                                                      \
 247         LASSERT_ATOMIC_POS(&exp->exp_locks_count);                      \
 248         atomic_dec(&(exp)->exp_locks_count);                            \
 249         __class_export_del_lock_ref(exp, lock);                         \
 250         CDEBUG(D_INFO, "lock PUTting export %p : new locks_count %d\n", \
 251                (exp), atomic_read(&(exp)->exp_locks_count));            \
 252         class_export_put(exp);                                          \
 253 })
 254
 255 #define class_export_cb_get(exp)                                        \
 256 ({                                                                      \
 257         atomic_inc(&(exp)->exp_cb_count);                               \
 258         CDEBUG(D_INFO, "callback GETting export %p : new cb_count %d\n",\
 259                (exp), atomic_read(&(exp)->exp_cb_count));               \
 260         class_export_get(exp);                                          \
 261 })
 262
 263 #define class_export_cb_put(exp)                                        \
 264 ({                                                                      \
 265         LASSERT_ATOMIC_POS(&exp->exp_cb_count);                         \
 266         atomic_dec(&(exp)->exp_cb_count);                               \
 267         CDEBUG(D_INFO, "callback PUTting export %p : new cb_count %d\n",\
 268                (exp), atomic_read(&(exp)->exp_cb_count));               \
 269         class_export_put(exp);                                          \
 270 })
 271
 272 /* genops.c */
 273 struct obd_export *class_export_get(struct obd_export *exp);
 274 void class_export_put(struct obd_export *exp);
 275 struct obd_export *class_new_export(struct obd_device *obddev,
 276                                     struct obd_uuid *cluuid);
 277 void class_unlink_export(struct obd_export *exp);
 278
 279 struct obd_import *class_import_get(struct obd_import *);
 280 void class_import_put(struct obd_import *);
 281 struct obd_import *class_new_import(struct obd_device *obd);
 282 void class_destroy_import(struct obd_import *exp);
 283
 284 struct obd_type *class_search_type(const char *name);
 285 struct obd_type *class_get_type(const char *name);
 286 void class_put_type(struct obd_type *type);
 287 int class_connect(struct lustre_handle *conn, struct obd_device *obd,
 288                   struct obd_uuid *cluuid);
 289 int class_disconnect(struct obd_export *exp);
 290 void class_fail_export(struct obd_export *exp);
 291 int class_connected_export(struct obd_export *exp);
 292 void class_disconnect_exports(struct obd_device *obddev);
 293 int class_manual_cleanup(struct obd_device *obd);
 294 void class_disconnect_stale_exports(struct obd_device *,
 295                                     int (*test_export)(struct obd_export *));
 296 static inline enum obd_option exp_flags_from_obd(struct obd_device *obd)
 297 {
 298         return ((obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 299                 (obd->obd_force ? OBD_OPT_FORCE : 0) |
 300                 (obd->obd_abort_recovery ? OBD_OPT_ABORT_RECOV : 0) |
 301                 0);
 302 }
 303
 304 #ifdef HAVE_SERVER_SUPPORT
 305 static inline struct lu_target *class_exp2tgt(struct obd_export *exp)
 306 {
 307         LASSERT(exp->exp_obd);
 308         return exp->exp_obd->u.obt.obt_lut;
 309 }
 310
 311 static inline struct lr_server_data *class_server_data(struct obd_device *obd)
 312 {
 313         LASSERT(obd->u.obt.obt_lut);
 314         return &obd->u.obt.obt_lut->lut_lsd;
 315 }
 316 #endif
 317
 318 /* obdo.c */
 319 struct lu_attr;
 320 struct inode;
 321
 322 void obdo_from_la(struct obdo *dst, const struct lu_attr *la, __u64 valid);
 323 void la_from_obdo(struct lu_attr *la, const struct obdo *dst, obd_flag valid);
 324 void obdo_refresh_inode(struct inode *dst, const struct obdo *src,
 325                         obd_flag valid);
 326
 327 void obdo_cpy_md(struct obdo *dst, const struct obdo *src, obd_flag valid);
 328 void obdo_to_ioobj(const struct obdo *oa, struct obd_ioobj *ioobj);
 329 void md_from_obdo(struct md_op_data *op_data, const struct obdo *oa,
 330                   obd_flag valid);
 331
 332 #define OBT(dev)        (dev)->obd_type
 333 #define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 334 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
 335 #define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
 336
 337 /* Ensure obd_setup: used for cleanup which must be called
 338    while obd is stopping */
 339 #define OBD_CHECK_DEV(obd)                                      \
 340 do {                                                            \
 341         if (!(obd)) {                                           \
 342                 CERROR("NULL device\n");                        \
 343                 RETURN(-ENODEV);                                \
 344         }                                                       \
 345 } while (0)
 346
 347 /* ensure obd_setup and !obd_stopping */
 348 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 349 do {                                                            \
 350         OBD_CHECK_DEV(obd);                                     \
 351         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 352                 CERROR("Device %d not setup\n",                 \
 353                        (obd)->obd_minor);                       \
 354                 RETURN(-ENODEV);                                \
 355         }                                                       \
 356 } while (0)
 357
 358
 359 #ifdef LPROCFS
 360 #define OBD_COUNTER_OFFSET(op)                                                 \
 361         ((offsetof(struct obd_ops, o_ ## op) -                                 \
 362           offsetof(struct obd_ops, o_iocontrol))                               \
 363          / sizeof(((struct obd_ops *)NULL)->o_iocontrol))
 364
 365 /* The '- 1' below is for o_owner. */
 366 #define NUM_OBD_STATS                                                          \
 367         (sizeof(struct obd_ops) /                                              \
 368          sizeof(((struct obd_ops *)NULL)->o_iocontrol) - 1)
 369
 370 #define OBD_COUNTER_INCREMENT(obd, op)                                         \
 371         lprocfs_counter_incr((obd)->obd_stats,                                 \
 372                              (obd)->obd_cntr_base + OBD_COUNTER_OFFSET(op))
 373
 374 #define EXP_COUNTER_INCREMENT(exp, op)                                         \
 375         do {                                                                   \
 376                 unsigned int _off;                                             \
 377                 _off = (exp)->exp_obd->obd_cntr_base + OBD_COUNTER_OFFSET(op); \
 378                 lprocfs_counter_incr((exp)->exp_obd->obd_stats, _off);         \
 379                 if ((exp)->exp_obd->obd_uses_nid_stats &&                      \
 380                     (exp)->exp_nid_stats != NULL)                              \
 381                         lprocfs_counter_incr((exp)->exp_nid_stats->nid_stats,  \
 382                                              _off);                            \
 383         } while (0)
 384
 385 #define _MD_COUNTER_OFFSET(m_op)                                               \
 386         ((offsetof(struct md_ops, m_op) -                                      \
 387           offsetof(struct md_ops, MD_STATS_FIRST_OP)) /                        \
 388          sizeof(((struct md_ops *)NULL)->MD_STATS_FIRST_OP))
 389
 390 #define MD_COUNTER_OFFSET(op) _MD_COUNTER_OFFSET(m_ ## op)
 391
 392 #define NUM_MD_STATS                                                           \
 393         (_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) -                                \
 394          _MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) + 1)
 395
 396 /* Note that we only increment md counters for ops whose offset is less
 397  * than NUM_MD_STATS. This is explained in a comment in the definition
 398  * of struct md_ops. */
 399 #define EXP_MD_COUNTER_INCREMENT(exp, op)                                      \
 400         do {                                                                   \
 401                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS)                      \
 402                         lprocfs_counter_incr((exp)->exp_obd->obd_md_stats,     \
 403                                         (exp)->exp_obd->obd_md_cntr_base +     \
 404                                         MD_COUNTER_OFFSET(op));                \
 405         } while (0)
 406
 407 #else
 408 #define OBD_COUNTER_OFFSET(op)
 409 #define OBD_COUNTER_INCREMENT(obd, op)
 410 #define EXP_COUNTER_INCREMENT(exp, op)
 411 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 412 #endif
 413
 414 static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
 415 {
 416         /* Always add in ldlm_stats */
 417         tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC
 418                                                   ,LPROCFS_STATS_FLAG_NOPERCPU);
 419         if (tmp->nid_ldlm_stats == NULL)
 420                 return -ENOMEM;
 421
 422         lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
 423
 424         return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
 425                                       tmp->nid_ldlm_stats);
 426 }
 427
 428 #define EXP_CHECK_MD_OP(exp, op)                                \
 429 do {                                                            \
 430         if ((exp) == NULL) {                                    \
 431                 CERROR("obd_" #op ": NULL export\n");           \
 432                 RETURN(-ENODEV);                                \
 433         }                                                       \
 434         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 435                 CERROR("obd_" #op ": cleaned up obd\n");        \
 436                 RETURN(-EOPNOTSUPP);                            \
 437         }                                                       \
 438         if (!OBT((exp)->exp_obd) || !MDP((exp)->exp_obd, op)) { \
 439                 CERROR("obd_" #op ": dev %s/%d no operation\n", \
 440                        (exp)->exp_obd->obd_name,                \
 441                        (exp)->exp_obd->obd_minor);              \
 442                 RETURN(-EOPNOTSUPP);                            \
 443         }                                                       \
 444 } while (0)
 445
 446
 447 #define OBD_CHECK_DT_OP(obd, op, err)                           \
 448 do {                                                            \
 449         if (!OBT(obd) || !OBP((obd), op)) {                     \
 450                 if (err)                                        \
 451                         CERROR("obd_" #op ": dev %d no operation\n",    \
 452                                obd->obd_minor);                 \
 453                 RETURN(err);                                    \
 454         }                                                       \
 455 } while (0)
 456
 457 #define EXP_CHECK_DT_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) || !OBP((exp)->exp_obd, op)) { \
 468                 CERROR("obd_" #op ": dev %d no operation\n",    \
 469                        (exp)->exp_obd->obd_minor);              \
 470                 RETURN(-EOPNOTSUPP);                            \
 471         }                                                       \
 472 } while (0)
 473
 474 #define CTXT_CHECK_OP(ctxt, op, err)                                 \
 475 do {                                                                 \
 476         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {             \
 477                 if (err)                                             \
 478                         CERROR("lop_" #op ": dev %d no operation\n", \
 479                                ctxt->loc_obd->obd_minor);            \
 480                 RETURN(err);                                         \
 481         }                                                            \
 482 } while (0)
 483
 484 static inline int class_devno_max(void)
 485 {
 486         return MAX_OBD_DEVICES;
 487 }
 488
 489 static inline int obd_get_info(const struct lu_env *env,
 490                                struct obd_export *exp, __u32 keylen,
 491                                void *key, __u32 *vallen, void *val,
 492                                struct lov_stripe_md *lsm)
 493 {
 494         int rc;
 495         ENTRY;
 496
 497         EXP_CHECK_DT_OP(exp, get_info);
 498         EXP_COUNTER_INCREMENT(exp, get_info);
 499
 500         rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val,
 501                                          lsm);
 502         RETURN(rc);
 503 }
 504
 505 static inline int obd_set_info_async(const struct lu_env *env,
 506                                      struct obd_export *exp, obd_count keylen,
 507                                      void *key, obd_count vallen, void *val,
 508                                      struct ptlrpc_request_set *set)
 509 {
 510         int rc;
 511         ENTRY;
 512
 513         EXP_CHECK_DT_OP(exp, set_info_async);
 514         EXP_COUNTER_INCREMENT(exp, set_info_async);
 515
 516         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 517                                                val, set);
 518         RETURN(rc);
 519 }
 520
 521 /*
 522  * obd-lu integration.
 523  *
 524  * Functionality is being moved into new lu_device-based layering, but some
 525  * pieces of configuration process are still based on obd devices.
 526  *
 527  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 528  * subsume ->o_setup() methods of obd devices they replace. The same for
 529  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 530  * result, obd_setup() and obd_process_config() branch and call one XOR
 531  * another.
 532  *
 533  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 534  * lu_device_type_operations::ldto_device_free() fully implement the
 535  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 536  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 537  */
 538
 539 #define DECLARE_LU_VARS(ldt, d)                 \
 540         struct lu_device_type *ldt;       \
 541         struct lu_device *d
 542
 543 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 544 {
 545         int rc;
 546         DECLARE_LU_VARS(ldt, d);
 547         ENTRY;
 548
 549         ldt = obd->obd_type->typ_lu;
 550         if (ldt != NULL) {
 551                 struct lu_context  session_ctx;
 552                 struct lu_env env;
 553                 lu_context_init(&session_ctx, LCT_SESSION | LCT_SERVER_SESSION);
 554                 session_ctx.lc_thread = NULL;
 555                 lu_context_enter(&session_ctx);
 556
 557                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 558                 if (rc == 0) {
 559                         env.le_ses = &session_ctx;
 560                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 561                         lu_env_fini(&env);
 562                         if (!IS_ERR(d)) {
 563                                 obd->obd_lu_dev = d;
 564                                 d->ld_obd = obd;
 565                                 rc = 0;
 566                         } else
 567                                 rc = PTR_ERR(d);
 568                 }
 569                 lu_context_exit(&session_ctx);
 570                 lu_context_fini(&session_ctx);
 571
 572         } else {
 573                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
 574                 OBD_COUNTER_INCREMENT(obd, setup);
 575                 rc = OBP(obd, setup)(obd, cfg);
 576         }
 577         RETURN(rc);
 578 }
 579
 580 static inline int obd_precleanup(struct obd_device *obd,
 581                                  enum obd_cleanup_stage cleanup_stage)
 582 {
 583         int rc;
 584         DECLARE_LU_VARS(ldt, d);
 585         ENTRY;
 586
 587         OBD_CHECK_DEV(obd);
 588         ldt = obd->obd_type->typ_lu;
 589         d = obd->obd_lu_dev;
 590         if (ldt != NULL && d != NULL) {
 591                 if (cleanup_stage == OBD_CLEANUP_EXPORTS) {
 592                         struct lu_env env;
 593
 594                         rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 595                         if (rc == 0) {
 596                                 ldt->ldt_ops->ldto_device_fini(&env, d);
 597                                 lu_env_fini(&env);
 598                         }
 599                 }
 600         }
 601         OBD_CHECK_DT_OP(obd, precleanup, 0);
 602         OBD_COUNTER_INCREMENT(obd, precleanup);
 603
 604         rc = OBP(obd, precleanup)(obd, cleanup_stage);
 605         RETURN(rc);
 606 }
 607
 608 static inline int obd_cleanup(struct obd_device *obd)
 609 {
 610         int rc;
 611         DECLARE_LU_VARS(ldt, d);
 612         ENTRY;
 613
 614         OBD_CHECK_DEV(obd);
 615
 616         ldt = obd->obd_type->typ_lu;
 617         d = obd->obd_lu_dev;
 618         if (ldt != NULL && d != NULL) {
 619                 struct lu_env env;
 620
 621                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 622                 if (rc == 0) {
 623                         ldt->ldt_ops->ldto_device_free(&env, d);
 624                         lu_env_fini(&env);
 625                         obd->obd_lu_dev = NULL;
 626                 }
 627         }
 628         OBD_CHECK_DT_OP(obd, cleanup, 0);
 629         OBD_COUNTER_INCREMENT(obd, cleanup);
 630
 631         rc = OBP(obd, cleanup)(obd);
 632         RETURN(rc);
 633 }
 634
 635 static inline void obd_cleanup_client_import(struct obd_device *obd)
 636 {
 637         ENTRY;
 638
 639         /* If we set up but never connected, the
 640            client import will not have been cleaned. */
 641         down_write(&obd->u.cli.cl_sem);
 642         if (obd->u.cli.cl_import) {
 643                 struct obd_import *imp;
 644                 imp = obd->u.cli.cl_import;
 645                 CDEBUG(D_CONFIG, "%s: client import never connected\n",
 646                        obd->obd_name);
 647                 ptlrpc_invalidate_import(imp);
 648                 if (imp->imp_rq_pool) {
 649                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
 650                         imp->imp_rq_pool = NULL;
 651                 }
 652                 client_destroy_import(imp);
 653                 obd->u.cli.cl_import = NULL;
 654         }
 655         up_write(&obd->u.cli.cl_sem);
 656
 657         EXIT;
 658 }
 659
 660 static inline int
 661 obd_process_config(struct obd_device *obd, int datalen, void *data)
 662 {
 663         int rc;
 664         DECLARE_LU_VARS(ldt, d);
 665         ENTRY;
 666
 667         OBD_CHECK_DEV(obd);
 668
 669         obd->obd_process_conf = 1;
 670         ldt = obd->obd_type->typ_lu;
 671         d = obd->obd_lu_dev;
 672         if (ldt != NULL && d != NULL) {
 673                 struct lu_env env;
 674
 675                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 676                 if (rc == 0) {
 677                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 678                         lu_env_fini(&env);
 679                 }
 680         } else {
 681                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
 682                 rc = OBP(obd, process_config)(obd, datalen, data);
 683         }
 684         OBD_COUNTER_INCREMENT(obd, process_config);
 685         obd->obd_process_conf = 0;
 686
 687         RETURN(rc);
 688 }
 689
 690 /* Pack an in-memory MD struct for storage on disk.
 691  * Returns +ve size of packed MD (0 for free), or -ve error.
 692  *
 693  * If @disk_tgt == NULL, MD size is returned (max size if @mem_src == NULL).
 694  * If @*disk_tgt != NULL and @mem_src == NULL, @*disk_tgt will be freed.
 695  * If @*disk_tgt == NULL, it will be allocated
 696  */
 697 static inline int obd_packmd(struct obd_export *exp,
 698                              struct lov_mds_md **disk_tgt,
 699                              struct lov_stripe_md *mem_src)
 700 {
 701         int rc;
 702         ENTRY;
 703
 704         EXP_CHECK_DT_OP(exp, packmd);
 705         EXP_COUNTER_INCREMENT(exp, packmd);
 706
 707         rc = OBP(exp->exp_obd, packmd)(exp, disk_tgt, mem_src);
 708         RETURN(rc);
 709 }
 710
 711 static inline int obd_size_diskmd(struct obd_export *exp,
 712                                   struct lov_stripe_md *mem_src)
 713 {
 714         return obd_packmd(exp, NULL, mem_src);
 715 }
 716
 717 static inline int obd_free_diskmd(struct obd_export *exp,
 718                                   struct lov_mds_md **disk_tgt)
 719 {
 720         LASSERT(disk_tgt);
 721         LASSERT(*disk_tgt);
 722         /*
 723          * LU-2590, for caller's convenience, *disk_tgt could be host
 724          * endianness, it needs swab to LE if necessary, while just
 725          * lov_mds_md header needs it for figuring out how much memory
 726          * needs to be freed.
 727          */
 728         if ((cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) &&
 729             (((*disk_tgt)->lmm_magic == LOV_MAGIC_V1) ||
 730              ((*disk_tgt)->lmm_magic == LOV_MAGIC_V3)))
 731                 lustre_swab_lov_mds_md(*disk_tgt);
 732         return obd_packmd(exp, disk_tgt, NULL);
 733 }
 734
 735 /* Unpack an MD struct from disk to in-memory format.
 736  * Returns +ve size of unpacked MD (0 for free), or -ve error.
 737  *
 738  * If @mem_tgt == NULL, MD size is returned (max size if @disk_src == NULL).
 739  * If @*mem_tgt != NULL and @disk_src == NULL, @*mem_tgt will be freed.
 740  * If @*mem_tgt == NULL, it will be allocated
 741  */
 742 static inline int obd_unpackmd(struct obd_export *exp,
 743                                struct lov_stripe_md **mem_tgt,
 744                                struct lov_mds_md *disk_src,
 745                                int disk_len)
 746 {
 747         int rc;
 748         ENTRY;
 749
 750         EXP_CHECK_DT_OP(exp, unpackmd);
 751         EXP_COUNTER_INCREMENT(exp, unpackmd);
 752
 753         rc = OBP(exp->exp_obd, unpackmd)(exp, mem_tgt, disk_src, disk_len);
 754         RETURN(rc);
 755 }
 756
 757 static inline int obd_free_memmd(struct obd_export *exp,
 758                                  struct lov_stripe_md **mem_tgt)
 759 {
 760         int rc;
 761
 762         LASSERT(mem_tgt);
 763         LASSERT(*mem_tgt);
 764         rc = obd_unpackmd(exp, mem_tgt, NULL, 0);
 765         *mem_tgt = NULL;
 766         return rc;
 767 }
 768
 769 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 770                              struct obdo *obdo, struct obd_trans_info *oti)
 771 {
 772         int rc;
 773         ENTRY;
 774
 775         EXP_CHECK_DT_OP(exp, create);
 776         EXP_COUNTER_INCREMENT(exp, create);
 777
 778         rc = OBP(exp->exp_obd, create)(env, exp, obdo, oti);
 779         RETURN(rc);
 780 }
 781
 782 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 783                               struct obdo *obdo, struct obd_trans_info *oti)
 784 {
 785         int rc;
 786         ENTRY;
 787
 788         EXP_CHECK_DT_OP(exp, destroy);
 789         EXP_COUNTER_INCREMENT(exp, destroy);
 790
 791         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo, oti);
 792         RETURN(rc);
 793 }
 794
 795 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 796                               struct obd_info *oinfo)
 797 {
 798         int rc;
 799         ENTRY;
 800
 801         EXP_CHECK_DT_OP(exp, getattr);
 802         EXP_COUNTER_INCREMENT(exp, getattr);
 803
 804         rc = OBP(exp->exp_obd, getattr)(env, exp, oinfo);
 805         RETURN(rc);
 806 }
 807
 808 static inline int obd_getattr_async(struct obd_export *exp,
 809                                     struct obd_info *oinfo,
 810                                     struct ptlrpc_request_set *set)
 811 {
 812         int rc;
 813         ENTRY;
 814
 815         EXP_CHECK_DT_OP(exp, getattr_async);
 816         EXP_COUNTER_INCREMENT(exp, getattr_async);
 817
 818         rc = OBP(exp->exp_obd, getattr_async)(exp, oinfo, set);
 819         RETURN(rc);
 820 }
 821
 822 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 823                               struct obd_info *oinfo,
 824                               struct obd_trans_info *oti)
 825 {
 826         int rc;
 827         ENTRY;
 828
 829         EXP_CHECK_DT_OP(exp, setattr);
 830         EXP_COUNTER_INCREMENT(exp, setattr);
 831
 832         rc = OBP(exp->exp_obd, setattr)(env, exp, oinfo, oti);
 833         RETURN(rc);
 834 }
 835
 836 /* This performs all the requests set init/wait/destroy actions. */
 837 static inline int obd_setattr_rqset(struct obd_export *exp,
 838                                     struct obd_info *oinfo,
 839                                     struct obd_trans_info *oti)
 840 {
 841         struct ptlrpc_request_set *set = NULL;
 842         int rc;
 843         ENTRY;
 844
 845         EXP_CHECK_DT_OP(exp, setattr_async);
 846         EXP_COUNTER_INCREMENT(exp, setattr_async);
 847
 848         set =  ptlrpc_prep_set();
 849         if (set == NULL)
 850                 RETURN(-ENOMEM);
 851
 852         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 853         if (rc == 0)
 854                 rc = ptlrpc_set_wait(set);
 855         ptlrpc_set_destroy(set);
 856         RETURN(rc);
 857 }
 858
 859 /* This adds all the requests into @set if @set != NULL, otherwise
 860    all requests are sent asynchronously without waiting for response. */
 861 static inline int obd_setattr_async(struct obd_export *exp,
 862                                     struct obd_info *oinfo,
 863                                     struct obd_trans_info *oti,
 864                                     struct ptlrpc_request_set *set)
 865 {
 866         int rc;
 867         ENTRY;
 868
 869         EXP_CHECK_DT_OP(exp, setattr_async);
 870         EXP_COUNTER_INCREMENT(exp, setattr_async);
 871
 872         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 873         RETURN(rc);
 874 }
 875
 876 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 877                                int priority)
 878 {
 879         struct obd_device *obd = imp->imp_obd;
 880         int rc;
 881         ENTRY;
 882
 883         OBD_CHECK_DEV_ACTIVE(obd);
 884         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 885         OBD_COUNTER_INCREMENT(obd, add_conn);
 886
 887         rc = OBP(obd, add_conn)(imp, uuid, priority);
 888         RETURN(rc);
 889 }
 890
 891 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 892 {
 893         struct obd_device *obd = imp->imp_obd;
 894         int rc;
 895         ENTRY;
 896
 897         OBD_CHECK_DEV_ACTIVE(obd);
 898         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 899         OBD_COUNTER_INCREMENT(obd, del_conn);
 900
 901         rc = OBP(obd, del_conn)(imp, uuid);
 902         RETURN(rc);
 903 }
 904
 905 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 906 {
 907         struct obd_uuid *uuid;
 908         ENTRY;
 909
 910         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 911         EXP_COUNTER_INCREMENT(exp, get_uuid);
 912
 913         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 914         RETURN(uuid);
 915 }
 916
 917 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 918  * @param exp New export handle
 919  * @param d Connect data, supported flags are set, flags also understood
 920  *    by obd are returned.
 921  */
 922 static inline int obd_connect(const struct lu_env *env,
 923                               struct obd_export **exp,struct obd_device *obd,
 924                               struct obd_uuid *cluuid,
 925                               struct obd_connect_data *data,
 926                               void *localdata)
 927 {
 928         int rc;
 929         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 930                                                    * check */
 931         ENTRY;
 932
 933         OBD_CHECK_DEV_ACTIVE(obd);
 934         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
 935         OBD_COUNTER_INCREMENT(obd, connect);
 936
 937         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 938         /* check that only subset is granted */
 939         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
 940                                     data->ocd_connect_flags));
 941         RETURN(rc);
 942 }
 943
 944 static inline int obd_reconnect(const struct lu_env *env,
 945                                 struct obd_export *exp,
 946                                 struct obd_device *obd,
 947                                 struct obd_uuid *cluuid,
 948                                 struct obd_connect_data *d,
 949                                 void *localdata)
 950 {
 951         int rc;
 952         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
 953                                                    * check */
 954
 955         ENTRY;
 956
 957         OBD_CHECK_DEV_ACTIVE(obd);
 958         OBD_CHECK_DT_OP(obd, reconnect, 0);
 959         OBD_COUNTER_INCREMENT(obd, reconnect);
 960
 961         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 962         /* check that only subset is granted */
 963         LASSERT(ergo(d != NULL,
 964                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 965         RETURN(rc);
 966 }
 967
 968 static inline int obd_disconnect(struct obd_export *exp)
 969 {
 970         int rc;
 971         ENTRY;
 972
 973         EXP_CHECK_DT_OP(exp, disconnect);
 974         EXP_COUNTER_INCREMENT(exp, disconnect);
 975
 976         rc = OBP(exp->exp_obd, disconnect)(exp);
 977         RETURN(rc);
 978 }
 979
 980 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
 981                                enum lu_cli_type type)
 982 {
 983         int rc;
 984         ENTRY;
 985
 986         OBD_CHECK_DT_OP(obd, fid_init, 0);
 987         OBD_COUNTER_INCREMENT(obd, fid_init);
 988
 989         rc = OBP(obd, fid_init)(obd, exp, type);
 990         RETURN(rc);
 991 }
 992
 993 static inline int obd_fid_fini(struct obd_device *obd)
 994 {
 995         int rc;
 996         ENTRY;
 997
 998         OBD_CHECK_DT_OP(obd, fid_fini, 0);
 999         OBD_COUNTER_INCREMENT(obd, fid_fini);
1000
1001         rc = OBP(obd, fid_fini)(obd);
1002         RETURN(rc);
1003 }
1004
1005 static inline int obd_fid_alloc(const struct lu_env *env,
1006                                 struct obd_export *exp,
1007                                 struct lu_fid *fid,
1008                                 struct md_op_data *op_data)
1009 {
1010         int rc;
1011         ENTRY;
1012
1013         EXP_CHECK_DT_OP(exp, fid_alloc);
1014         EXP_COUNTER_INCREMENT(exp, fid_alloc);
1015
1016         rc = OBP(exp->exp_obd, fid_alloc)(env, exp, fid, op_data);
1017         RETURN(rc);
1018 }
1019
1020 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
1021 {
1022         int rc;
1023         ENTRY;
1024
1025         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
1026         EXP_COUNTER_INCREMENT(exp, ping);
1027
1028         rc = OBP(exp->exp_obd, ping)(env, exp);
1029         RETURN(rc);
1030 }
1031
1032 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
1033 {
1034         int rc;
1035         ENTRY;
1036
1037         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
1038         OBD_COUNTER_INCREMENT(obd, pool_new);
1039
1040         rc = OBP(obd, pool_new)(obd, poolname);
1041         RETURN(rc);
1042 }
1043
1044 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
1045 {
1046         int rc;
1047         ENTRY;
1048
1049         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
1050         OBD_COUNTER_INCREMENT(obd, pool_del);
1051
1052         rc = OBP(obd, pool_del)(obd, poolname);
1053         RETURN(rc);
1054 }
1055
1056 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
1057 {
1058         int rc;
1059         ENTRY;
1060
1061         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
1062         OBD_COUNTER_INCREMENT(obd, pool_add);
1063
1064         rc = OBP(obd, pool_add)(obd, poolname, ostname);
1065         RETURN(rc);
1066 }
1067
1068 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
1069 {
1070         int rc;
1071         ENTRY;
1072
1073         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
1074         OBD_COUNTER_INCREMENT(obd, pool_rem);
1075
1076         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
1077         RETURN(rc);
1078 }
1079
1080 static inline void obd_getref(struct obd_device *obd)
1081 {
1082         ENTRY;
1083         if (OBT(obd) && OBP(obd, getref)) {
1084                 OBD_COUNTER_INCREMENT(obd, getref);
1085                 OBP(obd, getref)(obd);
1086         }
1087         EXIT;
1088 }
1089
1090 static inline void obd_putref(struct obd_device *obd)
1091 {
1092         ENTRY;
1093         if (OBT(obd) && OBP(obd, putref)) {
1094                 OBD_COUNTER_INCREMENT(obd, putref);
1095                 OBP(obd, putref)(obd);
1096         }
1097         EXIT;
1098 }
1099
1100 static inline int obd_init_export(struct obd_export *exp)
1101 {
1102         int rc = 0;
1103
1104         ENTRY;
1105         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1106             OBP((exp)->exp_obd, init_export))
1107                 rc = OBP(exp->exp_obd, init_export)(exp);
1108         RETURN(rc);
1109 }
1110
1111 static inline int obd_destroy_export(struct obd_export *exp)
1112 {
1113         ENTRY;
1114         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1115             OBP((exp)->exp_obd, destroy_export))
1116                 OBP(exp->exp_obd, destroy_export)(exp);
1117         RETURN(0);
1118 }
1119
1120 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1121  * If the cache is older than @max_age we will get a new value from the
1122  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1123 static inline int obd_statfs_async(struct obd_export *exp,
1124                                    struct obd_info *oinfo,
1125                                    __u64 max_age,
1126                                    struct ptlrpc_request_set *rqset)
1127 {
1128         int rc = 0;
1129         struct obd_device *obd;
1130         ENTRY;
1131
1132         if (exp == NULL || exp->exp_obd == NULL)
1133                 RETURN(-EINVAL);
1134
1135         obd = exp->exp_obd;
1136         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1137         OBD_COUNTER_INCREMENT(obd, statfs);
1138
1139         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
1140                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1141         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1142                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1143         } else {
1144                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
1145                        " objects "LPU64"/"LPU64"\n",
1146                        obd->obd_name, &obd->obd_osfs,
1147                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1148                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1149                 spin_lock(&obd->obd_osfs_lock);
1150                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1151                 spin_unlock(&obd->obd_osfs_lock);
1152                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1153                 if (oinfo->oi_cb_up)
1154                         oinfo->oi_cb_up(oinfo, 0);
1155         }
1156         RETURN(rc);
1157 }
1158
1159 static inline int obd_statfs_rqset(struct obd_export *exp,
1160                                    struct obd_statfs *osfs, __u64 max_age,
1161                                    __u32 flags)
1162 {
1163         struct ptlrpc_request_set *set = NULL;
1164         struct obd_info oinfo = { { { 0 } } };
1165         int rc = 0;
1166         ENTRY;
1167
1168         set =  ptlrpc_prep_set();
1169         if (set == NULL)
1170                 RETURN(-ENOMEM);
1171
1172         oinfo.oi_osfs = osfs;
1173         oinfo.oi_flags = flags;
1174         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1175         if (rc == 0)
1176                 rc = ptlrpc_set_wait(set);
1177         ptlrpc_set_destroy(set);
1178         RETURN(rc);
1179 }
1180
1181 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1182  * If the cache is older than @max_age we will get a new value from the
1183  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1184 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1185                              struct obd_statfs *osfs, __u64 max_age,
1186                              __u32 flags)
1187 {
1188         int rc = 0;
1189         struct obd_device *obd = exp->exp_obd;
1190         ENTRY;
1191
1192         if (obd == NULL)
1193                 RETURN(-EINVAL);
1194
1195         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1196         OBD_COUNTER_INCREMENT(obd, statfs);
1197
1198         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
1199                obd->obd_osfs_age, max_age);
1200         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1201                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1202                 if (rc == 0) {
1203                         spin_lock(&obd->obd_osfs_lock);
1204                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1205                         obd->obd_osfs_age = cfs_time_current_64();
1206                         spin_unlock(&obd->obd_osfs_lock);
1207                 }
1208         } else {
1209                 CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
1210                        " objects "LPU64"/"LPU64"\n",
1211                        obd->obd_name, &obd->obd_osfs,
1212                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1213                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1214                 spin_lock(&obd->obd_osfs_lock);
1215                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1216                 spin_unlock(&obd->obd_osfs_lock);
1217         }
1218         RETURN(rc);
1219 }
1220
1221 static inline int obd_preprw(const struct lu_env *env, int cmd,
1222                              struct obd_export *exp, struct obdo *oa,
1223                              int objcount, struct obd_ioobj *obj,
1224                              struct niobuf_remote *remote, int *pages,
1225                              struct niobuf_local *local,
1226                              struct obd_trans_info *oti,
1227                              struct lustre_capa *capa)
1228 {
1229         int rc;
1230         ENTRY;
1231
1232         EXP_CHECK_DT_OP(exp, preprw);
1233         EXP_COUNTER_INCREMENT(exp, preprw);
1234
1235         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1236                                        pages, local, oti, capa);
1237         RETURN(rc);
1238 }
1239
1240 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1241                                struct obd_export *exp, struct obdo *oa,
1242                                int objcount, struct obd_ioobj *obj,
1243                                struct niobuf_remote *rnb, int pages,
1244                                struct niobuf_local *local,
1245                                struct obd_trans_info *oti, int rc)
1246 {
1247         ENTRY;
1248
1249         EXP_CHECK_DT_OP(exp, commitrw);
1250         EXP_COUNTER_INCREMENT(exp, commitrw);
1251
1252         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1253                                          rnb, pages, local, oti, rc);
1254         RETURN(rc);
1255 }
1256
1257 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1258                                 int len, void *karg, void __user *uarg)
1259 {
1260         int rc;
1261         ENTRY;
1262
1263         EXP_CHECK_DT_OP(exp, iocontrol);
1264         EXP_COUNTER_INCREMENT(exp, iocontrol);
1265
1266         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1267         RETURN(rc);
1268 }
1269
1270 static inline int obd_change_cbdata(struct obd_export *exp,
1271                                     struct lov_stripe_md *lsm,
1272                                     ldlm_iterator_t it, void *data)
1273 {
1274         int rc;
1275         ENTRY;
1276
1277         EXP_CHECK_DT_OP(exp, change_cbdata);
1278         EXP_COUNTER_INCREMENT(exp, change_cbdata);
1279
1280         rc = OBP(exp->exp_obd, change_cbdata)(exp, lsm, it, data);
1281         RETURN(rc);
1282 }
1283
1284 static inline int obd_find_cbdata(struct obd_export *exp,
1285                                   struct lov_stripe_md *lsm,
1286                                   ldlm_iterator_t it, void *data)
1287 {
1288         int rc;
1289         ENTRY;
1290
1291         EXP_CHECK_DT_OP(exp, find_cbdata);
1292         EXP_COUNTER_INCREMENT(exp, find_cbdata);
1293
1294         rc = OBP(exp->exp_obd, find_cbdata)(exp, lsm, it, data);
1295         RETURN(rc);
1296 }
1297
1298 static inline void obd_import_event(struct obd_device *obd,
1299                                     struct obd_import *imp,
1300                                     enum obd_import_event event)
1301 {
1302         ENTRY;
1303         if (!obd) {
1304                 CERROR("NULL device\n");
1305                 EXIT;
1306                 return;
1307         }
1308         if (obd->obd_set_up && OBP(obd, import_event)) {
1309                 OBD_COUNTER_INCREMENT(obd, import_event);
1310                 OBP(obd, import_event)(obd, imp, event);
1311         }
1312         EXIT;
1313 }
1314
1315 static inline int obd_notify(struct obd_device *obd,
1316                              struct obd_device *watched,
1317                              enum obd_notify_event ev,
1318                              void *data)
1319 {
1320         int rc;
1321         ENTRY;
1322         OBD_CHECK_DEV(obd);
1323
1324         if (!obd->obd_set_up) {
1325                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1326                 RETURN(-EINVAL);
1327         }
1328
1329         if (!OBP(obd, notify)) {
1330                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1331                 RETURN(-ENOSYS);
1332         }
1333
1334         OBD_COUNTER_INCREMENT(obd, notify);
1335         rc = OBP(obd, notify)(obd, watched, ev, data);
1336         RETURN(rc);
1337 }
1338
1339 static inline int obd_notify_observer(struct obd_device *observer,
1340                                       struct obd_device *observed,
1341                                       enum obd_notify_event ev,
1342                                       void *data)
1343 {
1344         int rc1;
1345         int rc2;
1346
1347         struct obd_notify_upcall *onu;
1348
1349         if (observer->obd_observer)
1350                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1351         else
1352                 rc1 = 0;
1353         /*
1354          * Also, call non-obd listener, if any
1355          */
1356         onu = &observer->obd_upcall;
1357         if (onu->onu_upcall != NULL)
1358                 rc2 = onu->onu_upcall(observer, observed, ev,
1359                                       onu->onu_owner, NULL);
1360         else
1361                 rc2 = 0;
1362
1363         return rc1 ? rc1 : rc2;
1364 }
1365
1366 static inline int obd_quotacheck(struct obd_export *exp,
1367                                  struct obd_quotactl *oqctl)
1368 {
1369         int rc;
1370         ENTRY;
1371
1372         EXP_CHECK_DT_OP(exp, quotacheck);
1373         EXP_COUNTER_INCREMENT(exp, quotacheck);
1374
1375         rc = OBP(exp->exp_obd, quotacheck)(exp->exp_obd, exp, oqctl);
1376         RETURN(rc);
1377 }
1378
1379 static inline int obd_quotactl(struct obd_export *exp,
1380                                struct obd_quotactl *oqctl)
1381 {
1382         int rc;
1383         ENTRY;
1384
1385         EXP_CHECK_DT_OP(exp, quotactl);
1386         EXP_COUNTER_INCREMENT(exp, quotactl);
1387
1388         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1389         RETURN(rc);
1390 }
1391
1392 static inline int obd_health_check(const struct lu_env *env,
1393                                    struct obd_device *obd)
1394 {
1395         /* returns: 0 on healthy
1396          *         >0 on unhealthy + reason code/flag
1397          *            however the only suppored reason == 1 right now
1398          *            We'll need to define some better reasons
1399          *            or flags in the future.
1400          *         <0 on error
1401          */
1402         int rc;
1403         ENTRY;
1404
1405         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1406         if (obd == NULL || !OBT(obd)) {
1407                 CERROR("cleaned up obd\n");
1408                 RETURN(-EOPNOTSUPP);
1409         }
1410         if (!obd->obd_set_up || obd->obd_stopping)
1411                 RETURN(0);
1412         if (!OBP(obd, health_check))
1413                 RETURN(0);
1414
1415         rc = OBP(obd, health_check)(env, obd);
1416         RETURN(rc);
1417 }
1418
1419 static inline int obd_register_observer(struct obd_device *obd,
1420                                         struct obd_device *observer)
1421 {
1422         ENTRY;
1423         OBD_CHECK_DEV(obd);
1424         down_write(&obd->obd_observer_link_sem);
1425         if (obd->obd_observer && observer) {
1426                 up_write(&obd->obd_observer_link_sem);
1427                 RETURN(-EALREADY);
1428         }
1429         obd->obd_observer = observer;
1430         up_write(&obd->obd_observer_link_sem);
1431         RETURN(0);
1432 }
1433
1434 /* metadata helpers */
1435 static inline int md_getstatus(struct obd_export *exp,
1436                                struct lu_fid *fid, struct obd_capa **pc)
1437 {
1438         int rc;
1439         ENTRY;
1440
1441         EXP_CHECK_MD_OP(exp, getstatus);
1442         EXP_MD_COUNTER_INCREMENT(exp, getstatus);
1443         rc = MDP(exp->exp_obd, getstatus)(exp, fid, pc);
1444         RETURN(rc);
1445 }
1446
1447 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1448                              struct ptlrpc_request **request)
1449 {
1450         int rc;
1451         ENTRY;
1452         EXP_CHECK_MD_OP(exp, getattr);
1453         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1454         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1455         RETURN(rc);
1456 }
1457
1458 static inline int md_null_inode(struct obd_export *exp,
1459                                    const struct lu_fid *fid)
1460 {
1461         int rc;
1462         ENTRY;
1463         EXP_CHECK_MD_OP(exp, null_inode);
1464         EXP_MD_COUNTER_INCREMENT(exp, null_inode);
1465         rc = MDP(exp->exp_obd, null_inode)(exp, fid);
1466         RETURN(rc);
1467 }
1468
1469 static inline int md_find_cbdata(struct obd_export *exp,
1470                                  const struct lu_fid *fid,
1471                                  ldlm_iterator_t it, void *data)
1472 {
1473         int rc;
1474         ENTRY;
1475         EXP_CHECK_MD_OP(exp, find_cbdata);
1476         EXP_MD_COUNTER_INCREMENT(exp, find_cbdata);
1477         rc = MDP(exp->exp_obd, find_cbdata)(exp, fid, it, data);
1478         RETURN(rc);
1479 }
1480
1481 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1482                            struct md_open_data *mod,
1483                            struct ptlrpc_request **request)
1484 {
1485         int rc;
1486         ENTRY;
1487         EXP_CHECK_MD_OP(exp, close);
1488         EXP_MD_COUNTER_INCREMENT(exp, close);
1489         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1490         RETURN(rc);
1491 }
1492
1493 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1494                             const void *data, size_t datalen, umode_t mode,
1495                             uid_t uid, gid_t gid, cfs_cap_t cap_effective,
1496                             __u64 rdev, struct ptlrpc_request **request)
1497 {
1498         int rc;
1499         ENTRY;
1500         EXP_CHECK_MD_OP(exp, create);
1501         EXP_MD_COUNTER_INCREMENT(exp, create);
1502         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1503                                        uid, gid, cap_effective, rdev, request);
1504         RETURN(rc);
1505 }
1506
1507 static inline int md_done_writing(struct obd_export *exp,
1508                                   struct md_op_data *op_data,
1509                                   struct md_open_data *mod)
1510 {
1511         int rc;
1512         ENTRY;
1513         EXP_CHECK_MD_OP(exp, done_writing);
1514         EXP_MD_COUNTER_INCREMENT(exp, done_writing);
1515         rc = MDP(exp->exp_obd, done_writing)(exp, op_data, mod);
1516         RETURN(rc);
1517 }
1518
1519 static inline int md_enqueue(struct obd_export *exp,
1520                              struct ldlm_enqueue_info *einfo,
1521                              const union ldlm_policy_data *policy,
1522                              struct lookup_intent *it,
1523                              struct md_op_data *op_data,
1524                              struct lustre_handle *lockh,
1525                              __u64 extra_lock_flags)
1526 {
1527         int rc;
1528         ENTRY;
1529         EXP_CHECK_MD_OP(exp, enqueue);
1530         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1531         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, policy, it, op_data, lockh,
1532                                         extra_lock_flags);
1533         RETURN(rc);
1534 }
1535
1536 static inline int md_getattr_name(struct obd_export *exp,
1537                                   struct md_op_data *op_data,
1538                                   struct ptlrpc_request **request)
1539 {
1540         int rc;
1541         ENTRY;
1542         EXP_CHECK_MD_OP(exp, getattr_name);
1543         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1544         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1545         RETURN(rc);
1546 }
1547
1548 static inline int md_intent_lock(struct obd_export *exp,
1549                                  struct md_op_data *op_data,
1550                                  struct lookup_intent *it,
1551                                  struct ptlrpc_request **reqp,
1552                                  ldlm_blocking_callback cb_blocking,
1553                                  __u64 extra_lock_flags)
1554 {
1555         int rc;
1556         ENTRY;
1557         EXP_CHECK_MD_OP(exp, intent_lock);
1558         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1559         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, it, reqp, cb_blocking,
1560                                             extra_lock_flags);
1561         RETURN(rc);
1562 }
1563
1564 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1565                           struct ptlrpc_request **request)
1566 {
1567         int rc;
1568         ENTRY;
1569         EXP_CHECK_MD_OP(exp, link);
1570         EXP_MD_COUNTER_INCREMENT(exp, link);
1571         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1572         RETURN(rc);
1573 }
1574
1575 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1576                             const char *old, size_t oldlen, const char *new,
1577                             size_t newlen, struct ptlrpc_request **request)
1578 {
1579         int rc;
1580         ENTRY;
1581         EXP_CHECK_MD_OP(exp, rename);
1582         EXP_MD_COUNTER_INCREMENT(exp, rename);
1583         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1584                                        newlen, request);
1585         RETURN(rc);
1586 }
1587
1588 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
1589                              void *ea, size_t ealen, void *ea2, size_t ea2len,
1590                              struct ptlrpc_request **request,
1591                              struct md_open_data **mod)
1592 {
1593         int rc;
1594         ENTRY;
1595         EXP_CHECK_MD_OP(exp, setattr);
1596         EXP_MD_COUNTER_INCREMENT(exp, setattr);
1597         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen,
1598                                         ea2, ea2len, request, mod);
1599         RETURN(rc);
1600 }
1601
1602 static inline int md_fsync(struct obd_export *exp, const struct lu_fid *fid,
1603                            struct obd_capa *oc, struct ptlrpc_request **request)
1604 {
1605         int rc;
1606         ENTRY;
1607         EXP_CHECK_MD_OP(exp, fsync);
1608         EXP_MD_COUNTER_INCREMENT(exp, fsync);
1609         rc = MDP(exp->exp_obd, fsync)(exp, fid, oc, request);
1610         RETURN(rc);
1611 }
1612
1613 static inline int md_read_page(struct obd_export *exp,
1614                                struct md_op_data *op_data,
1615                                struct md_callback *cb_op,
1616                                __u64  hash_offset,
1617                                struct page **ppage)
1618 {
1619         int rc;
1620         ENTRY;
1621         EXP_CHECK_MD_OP(exp, read_page);
1622         EXP_MD_COUNTER_INCREMENT(exp, read_page);
1623         rc = MDP(exp->exp_obd, read_page)(exp, op_data, cb_op, hash_offset,
1624                                           ppage);
1625         RETURN(rc);
1626 }
1627
1628 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
1629                             struct ptlrpc_request **request)
1630 {
1631         int rc;
1632         ENTRY;
1633         EXP_CHECK_MD_OP(exp, unlink);
1634         EXP_MD_COUNTER_INCREMENT(exp, unlink);
1635         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
1636         RETURN(rc);
1637 }
1638
1639 static inline int md_get_lustre_md(struct obd_export *exp,
1640                                    struct ptlrpc_request *req,
1641                                    struct obd_export *dt_exp,
1642                                    struct obd_export *md_exp,
1643                                    struct lustre_md *md)
1644 {
1645         ENTRY;
1646         EXP_CHECK_MD_OP(exp, get_lustre_md);
1647         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
1648         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
1649 }
1650
1651 static inline int md_free_lustre_md(struct obd_export *exp,
1652                                     struct lustre_md *md)
1653 {
1654         ENTRY;
1655         EXP_CHECK_MD_OP(exp, free_lustre_md);
1656         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
1657         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
1658 }
1659
1660 static inline int md_update_lsm_md(struct obd_export *exp,
1661                                    struct lmv_stripe_md *lsm,
1662                                    struct mdt_body *body,
1663                                    ldlm_blocking_callback cb)
1664 {
1665         ENTRY;
1666         EXP_CHECK_MD_OP(exp, update_lsm_md);
1667         EXP_MD_COUNTER_INCREMENT(exp, update_lsm_md);
1668         RETURN(MDP(exp->exp_obd, update_lsm_md)(exp, lsm, body, cb));
1669 }
1670
1671 static inline int md_merge_attr(struct obd_export *exp,
1672                                 const struct lmv_stripe_md *lsm,
1673                                 struct cl_attr *attr)
1674 {
1675         ENTRY;
1676         EXP_CHECK_MD_OP(exp, merge_attr);
1677         EXP_MD_COUNTER_INCREMENT(exp, merge_attr);
1678         RETURN(MDP(exp->exp_obd, merge_attr)(exp, lsm, attr));
1679 }
1680
1681 static inline int md_setxattr(struct obd_export *exp,
1682                               const struct lu_fid *fid, struct obd_capa *oc,
1683                               obd_valid valid, const char *name,
1684                               const char *input, int input_size,
1685                               int output_size, int flags, __u32 suppgid,
1686                               struct ptlrpc_request **request)
1687 {
1688         ENTRY;
1689         EXP_CHECK_MD_OP(exp, setxattr);
1690         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
1691         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, oc, valid, name, input,
1692                                            input_size, output_size, flags,
1693                                            suppgid, request));
1694 }
1695
1696 static inline int md_getxattr(struct obd_export *exp,
1697                               const struct lu_fid *fid, struct obd_capa *oc,
1698                               obd_valid valid, const char *name,
1699                               const char *input, int input_size,
1700                               int output_size, int flags,
1701                               struct ptlrpc_request **request)
1702 {
1703         ENTRY;
1704         EXP_CHECK_MD_OP(exp, getxattr);
1705         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
1706         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, oc, valid, name, input,
1707                                            input_size, output_size, flags,
1708                                            request));
1709 }
1710
1711 static inline int md_set_open_replay_data(struct obd_export *exp,
1712                                           struct obd_client_handle *och,
1713                                           struct lookup_intent *it)
1714 {
1715         ENTRY;
1716         EXP_CHECK_MD_OP(exp, set_open_replay_data);
1717         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
1718         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, it));
1719 }
1720
1721 static inline int md_clear_open_replay_data(struct obd_export *exp,
1722                                             struct obd_client_handle *och)
1723 {
1724         ENTRY;
1725         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
1726         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
1727         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
1728 }
1729
1730 static inline int md_set_lock_data(struct obd_export *exp,
1731                                    __u64 *lockh, void *data, __u64 *bits)
1732 {
1733         ENTRY;
1734         EXP_CHECK_MD_OP(exp, set_lock_data);
1735         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
1736         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
1737 }
1738
1739 static inline int md_cancel_unused(struct obd_export *exp,
1740                                    const struct lu_fid *fid,
1741                                    ldlm_policy_data_t *policy,
1742                                    ldlm_mode_t mode,
1743                                    ldlm_cancel_flags_t flags,
1744                                    void *opaque)
1745 {
1746         int rc;
1747         ENTRY;
1748
1749         EXP_CHECK_MD_OP(exp, cancel_unused);
1750         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
1751
1752         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
1753                                               flags, opaque);
1754         RETURN(rc);
1755 }
1756
1757 static inline ldlm_mode_t md_lock_match(struct obd_export *exp, __u64 flags,
1758                                         const struct lu_fid *fid,
1759                                         ldlm_type_t type,
1760                                         ldlm_policy_data_t *policy,
1761                                         ldlm_mode_t mode,
1762                                         struct lustre_handle *lockh)
1763 {
1764         ENTRY;
1765         EXP_CHECK_MD_OP(exp, lock_match);
1766         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
1767         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
1768                                              policy, mode, lockh));
1769 }
1770
1771 static inline int md_init_ea_size(struct obd_export *exp, int easize,
1772                                   int def_asize, int cookiesize,
1773                                   int def_cookiesize)
1774 {
1775         ENTRY;
1776         EXP_CHECK_MD_OP(exp, init_ea_size);
1777         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
1778         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, easize, def_asize,
1779                                                cookiesize, def_cookiesize));
1780 }
1781
1782 static inline int md_get_remote_perm(struct obd_export *exp,
1783                                      const struct lu_fid *fid,
1784                                      struct obd_capa *oc, __u32 suppgid,
1785                                      struct ptlrpc_request **request)
1786 {
1787         ENTRY;
1788         EXP_CHECK_MD_OP(exp, get_remote_perm);
1789         EXP_MD_COUNTER_INCREMENT(exp, get_remote_perm);
1790         RETURN(MDP(exp->exp_obd, get_remote_perm)(exp, fid, oc, suppgid,
1791                                                   request));
1792 }
1793
1794 static inline int md_renew_capa(struct obd_export *exp, struct obd_capa *ocapa,
1795                                 renew_capa_cb_t cb)
1796 {
1797         int rc;
1798         ENTRY;
1799         EXP_CHECK_MD_OP(exp, renew_capa);
1800         EXP_MD_COUNTER_INCREMENT(exp, renew_capa);
1801         rc = MDP(exp->exp_obd, renew_capa)(exp, ocapa, cb);
1802         RETURN(rc);
1803 }
1804
1805 static inline int md_unpack_capa(struct obd_export *exp,
1806                                  struct ptlrpc_request *req,
1807                                  const struct req_msg_field *field,
1808                                  struct obd_capa **oc)
1809 {
1810         int rc;
1811         ENTRY;
1812         EXP_CHECK_MD_OP(exp, unpack_capa);
1813         EXP_MD_COUNTER_INCREMENT(exp, unpack_capa);
1814         rc = MDP(exp->exp_obd, unpack_capa)(exp, req, field, oc);
1815         RETURN(rc);
1816 }
1817
1818 static inline int md_intent_getattr_async(struct obd_export *exp,
1819                                           struct md_enqueue_info *minfo,
1820                                           struct ldlm_enqueue_info *einfo)
1821 {
1822         int rc;
1823         ENTRY;
1824         EXP_CHECK_MD_OP(exp, intent_getattr_async);
1825         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
1826         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo, einfo);
1827         RETURN(rc);
1828 }
1829
1830 static inline int md_revalidate_lock(struct obd_export *exp,
1831                                      struct lookup_intent *it,
1832                                      struct lu_fid *fid, __u64 *bits)
1833 {
1834         int rc;
1835         ENTRY;
1836         EXP_CHECK_MD_OP(exp, revalidate_lock);
1837         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
1838         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
1839         RETURN(rc);
1840 }
1841
1842 static inline int md_get_fid_from_lsm(struct obd_export *exp,
1843                                       const struct lmv_stripe_md *lsm,
1844                                       const char *name, int namelen,
1845                                       struct lu_fid *fid)
1846 {
1847         int rc;
1848         ENTRY;
1849         EXP_CHECK_MD_OP(exp, get_fid_from_lsm);
1850         EXP_MD_COUNTER_INCREMENT(exp, get_fid_from_lsm);
1851         rc = MDP(exp->exp_obd, get_fid_from_lsm)(exp, lsm, name, namelen, fid);
1852         RETURN(rc);
1853 }
1854
1855 /* OBD Metadata Support */
1856
1857 extern int obd_init_caches(void);
1858 extern void obd_cleanup_caches(void);
1859
1860 /* support routines */
1861 extern struct kmem_cache *obdo_cachep;
1862
1863 #define OBDO_ALLOC(ptr)                                                       \
1864 do {                                                                          \
1865         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, GFP_NOFS);             \
1866 } while(0)
1867
1868 #define OBDO_FREE(ptr)                                                        \
1869 do {                                                                          \
1870         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1871 } while(0)
1872
1873
1874 typedef int (*register_lwp_cb)(void *data);
1875
1876 struct lwp_register_item {
1877         struct obd_export **lri_exp;
1878         register_lwp_cb     lri_cb_func;
1879         void               *lri_cb_data;
1880         struct list_head            lri_list;
1881         char                lri_name[MTI_NAME_MAXLEN];
1882 };
1883
1884 /* I'm as embarrassed about this as you are.
1885  *
1886  * <shaver> // XXX do not look into _superhack with remaining eye
1887  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1888 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1889
1890 /* obd_mount.c */
1891 #ifdef HAVE_SERVER_SUPPORT
1892 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
1893                              register_lwp_cb cb_func, void *cb_data);
1894 void lustre_deregister_lwp_item(struct obd_export **exp);
1895 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx);
1896 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx);
1897 #endif /* HAVE_SERVER_SUPPORT */
1898
1899 /* sysctl.c */
1900 extern void obd_sysctl_init (void);
1901 extern void obd_sysctl_clean (void);
1902
1903 /* uuid.c  */
1904 typedef __u8 class_uuid_t[16];
1905 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
1906
1907 /* lustre_peer.c    */
1908 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
1909 int class_add_uuid(const char *uuid, __u64 nid);
1910 int class_del_uuid (const char *uuid);
1911 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
1912 void class_init_uuidlist(void);
1913 void class_exit_uuidlist(void);
1914
1915 /* prng.c */
1916 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
1917
1918 /* statfs_pack.c */
1919 struct kstatfs;
1920 void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
1921 void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);
1922
1923 /* root squash info */
1924 struct rw_semaphore;
1925 struct root_squash_info {
1926         uid_t                   rsi_uid;
1927         gid_t                   rsi_gid;
1928         struct list_head        rsi_nosquash_nids;
1929         struct rw_semaphore     rsi_sem;
1930 };
1931
1932 int server_name2index(const char *svname, __u32 *idx, const char **endptr);
1933
1934 #endif /* __LINUX_OBD_CLASS_H */