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, 2014, 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 __u16 obd_get_max_mod_rpcs_in_flight(struct client_obd *cli);
 121 int obd_set_max_mod_rpcs_in_flight(struct client_obd *cli, __u16 max);
 122 int obd_mod_rpc_stats_seq_show(struct client_obd *cli, struct seq_file *seq);
 123
 124 __u16 obd_get_mod_rpc_slot(struct client_obd *cli, __u32 opc,
 125                            struct lookup_intent *it);
 126 void obd_put_mod_rpc_slot(struct client_obd *cli, __u32 opc,
 127                           struct lookup_intent *it, __u16 tag);
 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
 134 extern atomic_t         obd_stale_export_num;
 135 extern struct list_head obd_stale_exports;
 136 extern spinlock_t       obd_stale_export_lock;
 137
 138 struct obd_export *obd_stale_export_get(void);
 139 void obd_stale_export_put(struct obd_export *exp);
 140 void obd_stale_export_adjust(struct obd_export *exp);
 141
 142 /* obd_config.c */
 143 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
 144                                      const char *new_name);
 145 int class_process_config(struct lustre_cfg *lcfg);
 146 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 147                              struct lustre_cfg *lcfg, void *data);
 148 int class_attach(struct lustre_cfg *lcfg);
 149 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
 150 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg);
 151 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg);
 152 struct obd_device *class_incref(struct obd_device *obd,
 153                                 const char *scope, const void *source);
 154 void class_decref(struct obd_device *obd,
 155                   const char *scope, const void *source);
 156 void dump_exports(struct obd_device *obd, int locks);
 157 int class_config_llog_handler(const struct lu_env *env,
 158                               struct llog_handle *handle,
 159                               struct llog_rec_hdr *rec, void *data);
 160 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg);
 161 int class_add_uuid(const char *uuid, __u64 nid);
 162
 163 #define CFG_F_START     0x01   /* Set when we start updating from a log */
 164 #define CFG_F_MARKER    0x02   /* We are within a maker */
 165 #define CFG_F_SKIP      0x04   /* We should ignore this cfg command */
 166 #define CFG_F_COMPAT146 0x08   /* Allow old-style logs */
 167 #define CFG_F_EXCLUDE   0x10   /* OST exclusion list */
 168
 169 /* Passed as data param to class_config_parse_llog */
 170 struct config_llog_instance {
 171         char                    *cfg_obdname;
 172         void                    *cfg_instance;
 173         struct super_block      *cfg_sb;
 174         struct obd_uuid          cfg_uuid;
 175         llog_cb_t                cfg_callback;
 176         int                      cfg_last_idx; /* for partial llog processing */
 177         int                      cfg_flags;
 178         __u32                    cfg_lwp_idx;
 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
 183 enum {
 184         CONFIG_T_CONFIG  = 0,
 185         CONFIG_T_SPTLRPC = 1,
 186         CONFIG_T_RECOVER = 2,
 187         CONFIG_T_PARAMS  = 3,
 188         CONFIG_T_MAX     = 4
 189 };
 190
 191 #define PARAMS_FILENAME "params"
 192 #define LCTL_UPCALL     "lctl"
 193
 194 /* list of active configuration logs  */
 195 struct config_llog_data {
 196         struct ldlm_res_id          cld_resid;
 197         struct config_llog_instance cld_cfg;
 198         struct list_head            cld_list_chain;
 199         atomic_t                    cld_refcount;
 200         struct config_llog_data    *cld_sptlrpc;/* depended sptlrpc log */
 201         struct config_llog_data    *cld_params; /* common parameters log */
 202         struct config_llog_data    *cld_recover;/* imperative recover log */
 203         struct obd_export          *cld_mgcexp;
 204         struct mutex                cld_lock;
 205         int                         cld_type;
 206         unsigned int                cld_stopping:1, /* we were told to stop
 207                                                      * watching */
 208                                     cld_lostlock:1; /* lock not requeued */
 209         char                        cld_logname[0];
 210 };
 211
 212 struct lustre_profile {
 213         struct list_head         lp_list;
 214         char                    *lp_profile;
 215         char                    *lp_dt;
 216         char                    *lp_md;
 217         int                      lp_refs;
 218         bool                     lp_list_deleted;
 219 };
 220
 221 struct lustre_profile *class_get_profile(const char * prof);
 222 void class_del_profile(const char *prof);
 223 void class_put_profile(struct lustre_profile *lprof);
 224 void class_del_profiles(void);
 225
 226
 227 #if LUSTRE_TRACKS_LOCK_EXP_REFS
 228
 229 void __class_export_add_lock_ref(struct obd_export *, struct ldlm_lock *);
 230 void __class_export_del_lock_ref(struct obd_export *, struct ldlm_lock *);
 231 extern void (*class_export_dump_hook)(struct obd_export *);
 232
 233 #else
 234
 235 #define __class_export_add_lock_ref(exp, lock)             do {} while(0)
 236 #define __class_export_del_lock_ref(exp, lock)             do {} while(0)
 237
 238 #endif
 239
 240 #define class_export_rpc_inc(exp)                                       \
 241 ({                                                                      \
 242         atomic_inc(&(exp)->exp_rpc_count);                              \
 243         CDEBUG(D_INFO, "RPC GETting export %p : new rpc_count %d\n",    \
 244                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 245 })
 246
 247 #define class_export_rpc_dec(exp)                                       \
 248 ({                                                                      \
 249         LASSERT_ATOMIC_POS(&exp->exp_rpc_count);                        \
 250         atomic_dec(&(exp)->exp_rpc_count);                              \
 251         CDEBUG(D_INFO, "RPC PUTting export %p : new rpc_count %d\n",    \
 252                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 253 })
 254
 255 #define class_export_lock_get(exp, lock)                                \
 256 ({                                                                      \
 257         atomic_inc(&(exp)->exp_locks_count);                            \
 258         __class_export_add_lock_ref(exp, lock);                         \
 259         CDEBUG(D_INFO, "lock GETting export %p : new locks_count %d\n", \
 260                (exp), atomic_read(&(exp)->exp_locks_count));            \
 261         class_export_get(exp);                                          \
 262 })
 263
 264 #define class_export_lock_put(exp, lock)                                \
 265 ({                                                                      \
 266         LASSERT_ATOMIC_POS(&exp->exp_locks_count);                      \
 267         atomic_dec(&(exp)->exp_locks_count);                            \
 268         __class_export_del_lock_ref(exp, lock);                         \
 269         CDEBUG(D_INFO, "lock PUTting export %p : new locks_count %d\n", \
 270                (exp), atomic_read(&(exp)->exp_locks_count));            \
 271         class_export_put(exp);                                          \
 272 })
 273
 274 #define class_export_cb_get(exp)                                        \
 275 ({                                                                      \
 276         atomic_inc(&(exp)->exp_cb_count);                               \
 277         CDEBUG(D_INFO, "callback GETting export %p : new cb_count %d\n",\
 278                (exp), atomic_read(&(exp)->exp_cb_count));               \
 279         class_export_get(exp);                                          \
 280 })
 281
 282 #define class_export_cb_put(exp)                                        \
 283 ({                                                                      \
 284         LASSERT_ATOMIC_POS(&exp->exp_cb_count);                         \
 285         atomic_dec(&(exp)->exp_cb_count);                               \
 286         CDEBUG(D_INFO, "callback PUTting export %p : new cb_count %d\n",\
 287                (exp), atomic_read(&(exp)->exp_cb_count));               \
 288         class_export_put(exp);                                          \
 289 })
 290
 291 /* genops.c */
 292 struct obd_export *class_export_get(struct obd_export *exp);
 293 void class_export_put(struct obd_export *exp);
 294 struct obd_export *class_new_export(struct obd_device *obddev,
 295                                     struct obd_uuid *cluuid);
 296 void class_unlink_export(struct obd_export *exp);
 297
 298 struct obd_import *class_import_get(struct obd_import *);
 299 void class_import_put(struct obd_import *);
 300 struct obd_import *class_new_import(struct obd_device *obd);
 301 void class_destroy_import(struct obd_import *exp);
 302
 303 struct obd_type *class_search_type(const char *name);
 304 struct obd_type *class_get_type(const char *name);
 305 void class_put_type(struct obd_type *type);
 306 int class_connect(struct lustre_handle *conn, struct obd_device *obd,
 307                   struct obd_uuid *cluuid);
 308 int class_disconnect(struct obd_export *exp);
 309 void class_fail_export(struct obd_export *exp);
 310 int class_connected_export(struct obd_export *exp);
 311 void class_disconnect_exports(struct obd_device *obddev);
 312 int class_manual_cleanup(struct obd_device *obd);
 313 void class_disconnect_stale_exports(struct obd_device *,
 314                                     int (*test_export)(struct obd_export *));
 315 static inline enum obd_option exp_flags_from_obd(struct obd_device *obd)
 316 {
 317         return ((obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 318                 (obd->obd_force ? OBD_OPT_FORCE : 0) |
 319                 (obd->obd_abort_recovery ? OBD_OPT_ABORT_RECOV : 0) |
 320                 0);
 321 }
 322
 323 #ifdef HAVE_SERVER_SUPPORT
 324 static inline struct lu_target *class_exp2tgt(struct obd_export *exp)
 325 {
 326         LASSERT(exp->exp_obd);
 327         if (exp->exp_obd->u.obt.obt_magic != OBT_MAGIC)
 328                 return NULL;
 329         return exp->exp_obd->u.obt.obt_lut;
 330 }
 331
 332 static inline struct lr_server_data *class_server_data(struct obd_device *obd)
 333 {
 334         LASSERT(obd->u.obt.obt_lut);
 335         return &obd->u.obt.obt_lut->lut_lsd;
 336 }
 337 #endif
 338
 339 /* obdo.c */
 340 struct lu_attr;
 341 struct inode;
 342
 343 void obdo_from_la(struct obdo *dst, const struct lu_attr *la, u64 valid);
 344 void la_from_obdo(struct lu_attr *la, const struct obdo *dst, u64 valid);
 345
 346 void obdo_cpy_md(struct obdo *dst, const struct obdo *src, u64 valid);
 347 void obdo_to_ioobj(const struct obdo *oa, struct obd_ioobj *ioobj);
 348
 349 #define OBT(dev)        (dev)->obd_type
 350 #define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 351 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
 352 #define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
 353
 354 /* Ensure obd_setup: used for cleanup which must be called
 355    while obd is stopping */
 356 #define OBD_CHECK_DEV(obd)                                      \
 357 do {                                                            \
 358         if (!(obd)) {                                           \
 359                 CERROR("NULL device\n");                        \
 360                 RETURN(-ENODEV);                                \
 361         }                                                       \
 362 } while (0)
 363
 364 /* ensure obd_setup and !obd_stopping */
 365 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 366 do {                                                            \
 367         OBD_CHECK_DEV(obd);                                     \
 368         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 369                 CERROR("Device %d not setup\n",                 \
 370                        (obd)->obd_minor);                       \
 371                 RETURN(-ENODEV);                                \
 372         }                                                       \
 373 } while (0)
 374
 375
 376 #ifdef CONFIG_PROC_FS
 377 #define OBD_COUNTER_OFFSET(op)                                                 \
 378         ((offsetof(struct obd_ops, o_ ## op) -                                 \
 379           offsetof(struct obd_ops, o_iocontrol))                               \
 380          / sizeof(((struct obd_ops *)NULL)->o_iocontrol))
 381
 382 /* The '- 1' below is for o_owner. */
 383 #define NUM_OBD_STATS                                                          \
 384         (sizeof(struct obd_ops) /                                              \
 385          sizeof(((struct obd_ops *)NULL)->o_iocontrol) - 1)
 386
 387 #define OBD_COUNTER_INCREMENT(obd, op)                                         \
 388         lprocfs_counter_incr((obd)->obd_stats,                                 \
 389                              (obd)->obd_cntr_base + OBD_COUNTER_OFFSET(op))
 390
 391 #define EXP_COUNTER_INCREMENT(exp, op)                                         \
 392         do {                                                                   \
 393                 unsigned int _off;                                             \
 394                 _off = (exp)->exp_obd->obd_cntr_base + OBD_COUNTER_OFFSET(op); \
 395                 lprocfs_counter_incr((exp)->exp_obd->obd_stats, _off);         \
 396                 if ((exp)->exp_obd->obd_uses_nid_stats &&                      \
 397                     (exp)->exp_nid_stats != NULL)                              \
 398                         lprocfs_counter_incr((exp)->exp_nid_stats->nid_stats,  \
 399                                              _off);                            \
 400         } while (0)
 401
 402 #define _MD_COUNTER_OFFSET(m_op)                                               \
 403         ((offsetof(struct md_ops, m_op) -                                      \
 404           offsetof(struct md_ops, MD_STATS_FIRST_OP)) /                        \
 405          sizeof(((struct md_ops *)NULL)->MD_STATS_FIRST_OP))
 406
 407 #define MD_COUNTER_OFFSET(op) _MD_COUNTER_OFFSET(m_ ## op)
 408
 409 #define NUM_MD_STATS                                                           \
 410         (_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) -                                \
 411          _MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) + 1)
 412
 413 /* Note that we only increment md counters for ops whose offset is less
 414  * than NUM_MD_STATS. This is explained in a comment in the definition
 415  * of struct md_ops. */
 416 #define EXP_MD_COUNTER_INCREMENT(exp, op)                                      \
 417         do {                                                                   \
 418                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS)                      \
 419                         lprocfs_counter_incr((exp)->exp_obd->obd_md_stats,     \
 420                                         (exp)->exp_obd->obd_md_cntr_base +     \
 421                                         MD_COUNTER_OFFSET(op));                \
 422         } while (0)
 423
 424 #else
 425 #define OBD_COUNTER_OFFSET(op)
 426 #define OBD_COUNTER_INCREMENT(obd, op)
 427 #define EXP_COUNTER_INCREMENT(exp, op)
 428 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 429 #endif
 430
 431 static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
 432 {
 433         /* Always add in ldlm_stats */
 434         tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC
 435                                                   ,LPROCFS_STATS_FLAG_NOPERCPU);
 436         if (tmp->nid_ldlm_stats == NULL)
 437                 return -ENOMEM;
 438
 439         lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
 440
 441         return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
 442                                       tmp->nid_ldlm_stats);
 443 }
 444
 445 #define EXP_CHECK_MD_OP(exp, op)                                \
 446 do {                                                            \
 447         if ((exp) == NULL) {                                    \
 448                 CERROR("obd_" #op ": NULL export\n");           \
 449                 RETURN(-ENODEV);                                \
 450         }                                                       \
 451         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 452                 CERROR("obd_" #op ": cleaned up obd\n");        \
 453                 RETURN(-EOPNOTSUPP);                            \
 454         }                                                       \
 455         if (!OBT((exp)->exp_obd) || !MDP((exp)->exp_obd, op)) { \
 456                 CERROR("obd_" #op ": dev %s/%d no operation\n", \
 457                        (exp)->exp_obd->obd_name,                \
 458                        (exp)->exp_obd->obd_minor);              \
 459                 RETURN(-EOPNOTSUPP);                            \
 460         }                                                       \
 461 } while (0)
 462
 463
 464 #define OBD_CHECK_DT_OP(obd, op, err)                           \
 465 do {                                                            \
 466         if (!OBT(obd) || !OBP((obd), op)) {                     \
 467                 if (err)                                        \
 468                         CERROR("obd_" #op ": dev %d no operation\n",    \
 469                                obd->obd_minor);                 \
 470                 RETURN(err);                                    \
 471         }                                                       \
 472 } while (0)
 473
 474 #define EXP_CHECK_DT_OP(exp, op)                                \
 475 do {                                                            \
 476         if ((exp) == NULL) {                                    \
 477                 CERROR("obd_" #op ": NULL export\n");           \
 478                 RETURN(-ENODEV);                                \
 479         }                                                       \
 480         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 481                 CERROR("obd_" #op ": cleaned up obd\n");        \
 482                 RETURN(-EOPNOTSUPP);                            \
 483         }                                                       \
 484         if (!OBT((exp)->exp_obd) || !OBP((exp)->exp_obd, op)) { \
 485                 CERROR("obd_" #op ": dev %d no operation\n",    \
 486                        (exp)->exp_obd->obd_minor);              \
 487                 RETURN(-EOPNOTSUPP);                            \
 488         }                                                       \
 489 } while (0)
 490
 491 #define CTXT_CHECK_OP(ctxt, op, err)                                 \
 492 do {                                                                 \
 493         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {             \
 494                 if (err)                                             \
 495                         CERROR("lop_" #op ": dev %d no operation\n", \
 496                                ctxt->loc_obd->obd_minor);            \
 497                 RETURN(err);                                         \
 498         }                                                            \
 499 } while (0)
 500
 501 static inline int class_devno_max(void)
 502 {
 503         return MAX_OBD_DEVICES;
 504 }
 505
 506 static inline int obd_get_info(const struct lu_env *env, struct obd_export *exp,
 507                                __u32 keylen, void *key,
 508                                __u32 *vallen, void *val)
 509 {
 510         int rc;
 511         ENTRY;
 512
 513         EXP_CHECK_DT_OP(exp, get_info);
 514         EXP_COUNTER_INCREMENT(exp, get_info);
 515
 516         rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val);
 517         RETURN(rc);
 518 }
 519
 520 static inline int obd_set_info_async(const struct lu_env *env,
 521                                      struct obd_export *exp,
 522                                      __u32 keylen, void *key,
 523                                      __u32 vallen, void *val,
 524                                      struct ptlrpc_request_set *set)
 525 {
 526         int rc;
 527         ENTRY;
 528
 529         EXP_CHECK_DT_OP(exp, set_info_async);
 530         EXP_COUNTER_INCREMENT(exp, set_info_async);
 531
 532         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 533                                                val, set);
 534         RETURN(rc);
 535 }
 536
 537 /*
 538  * obd-lu integration.
 539  *
 540  * Functionality is being moved into new lu_device-based layering, but some
 541  * pieces of configuration process are still based on obd devices.
 542  *
 543  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 544  * subsume ->o_setup() methods of obd devices they replace. The same for
 545  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 546  * result, obd_setup() and obd_process_config() branch and call one XOR
 547  * another.
 548  *
 549  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 550  * lu_device_type_operations::ldto_device_free() fully implement the
 551  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 552  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 553  */
 554
 555 #define DECLARE_LU_VARS(ldt, d)                 \
 556         struct lu_device_type *ldt;       \
 557         struct lu_device *d
 558
 559 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 560 {
 561         int rc;
 562         DECLARE_LU_VARS(ldt, d);
 563         ENTRY;
 564
 565         ldt = obd->obd_type->typ_lu;
 566         if (ldt != NULL) {
 567                 struct lu_context  session_ctx;
 568                 struct lu_env env;
 569                 lu_context_init(&session_ctx, LCT_SESSION | LCT_SERVER_SESSION);
 570                 session_ctx.lc_thread = NULL;
 571                 lu_context_enter(&session_ctx);
 572
 573                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 574                 if (rc == 0) {
 575                         env.le_ses = &session_ctx;
 576                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 577                         lu_env_fini(&env);
 578                         if (!IS_ERR(d)) {
 579                                 obd->obd_lu_dev = d;
 580                                 d->ld_obd = obd;
 581                                 rc = 0;
 582                         } else
 583                                 rc = PTR_ERR(d);
 584                 }
 585                 lu_context_exit(&session_ctx);
 586                 lu_context_fini(&session_ctx);
 587
 588         } else {
 589                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
 590                 OBD_COUNTER_INCREMENT(obd, setup);
 591                 rc = OBP(obd, setup)(obd, cfg);
 592         }
 593         RETURN(rc);
 594 }
 595
 596 static inline int obd_precleanup(struct obd_device *obd)
 597 {
 598         int rc;
 599         DECLARE_LU_VARS(ldt, d);
 600         ENTRY;
 601
 602         OBD_CHECK_DEV(obd);
 603         ldt = obd->obd_type->typ_lu;
 604         d = obd->obd_lu_dev;
 605         if (ldt != NULL && d != NULL) {
 606                 struct lu_env env;
 607
 608                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 609                 if (rc == 0) {
 610                         ldt->ldt_ops->ldto_device_fini(&env, d);
 611                         lu_env_fini(&env);
 612                 }
 613         }
 614         OBD_CHECK_DT_OP(obd, precleanup, 0);
 615         OBD_COUNTER_INCREMENT(obd, precleanup);
 616
 617         rc = OBP(obd, precleanup)(obd);
 618         RETURN(rc);
 619 }
 620
 621 static inline int obd_cleanup(struct obd_device *obd)
 622 {
 623         int rc;
 624         DECLARE_LU_VARS(ldt, d);
 625         ENTRY;
 626
 627         OBD_CHECK_DEV(obd);
 628
 629         ldt = obd->obd_type->typ_lu;
 630         d = obd->obd_lu_dev;
 631         if (ldt != NULL && d != NULL) {
 632                 struct lu_env env;
 633
 634                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 635                 if (rc == 0) {
 636                         ldt->ldt_ops->ldto_device_free(&env, d);
 637                         lu_env_fini(&env);
 638                         obd->obd_lu_dev = NULL;
 639                 }
 640         }
 641         OBD_CHECK_DT_OP(obd, cleanup, 0);
 642         OBD_COUNTER_INCREMENT(obd, cleanup);
 643
 644         rc = OBP(obd, cleanup)(obd);
 645         RETURN(rc);
 646 }
 647
 648 static inline void obd_cleanup_client_import(struct obd_device *obd)
 649 {
 650         ENTRY;
 651
 652         /* If we set up but never connected, the
 653            client import will not have been cleaned. */
 654         down_write(&obd->u.cli.cl_sem);
 655         if (obd->u.cli.cl_import) {
 656                 struct obd_import *imp;
 657                 imp = obd->u.cli.cl_import;
 658                 CDEBUG(D_CONFIG, "%s: client import never connected\n",
 659                        obd->obd_name);
 660                 ptlrpc_invalidate_import(imp);
 661                 client_destroy_import(imp);
 662                 obd->u.cli.cl_import = NULL;
 663         }
 664         up_write(&obd->u.cli.cl_sem);
 665
 666         EXIT;
 667 }
 668
 669 static inline int
 670 obd_process_config(struct obd_device *obd, int datalen, void *data)
 671 {
 672         int rc;
 673         DECLARE_LU_VARS(ldt, d);
 674         ENTRY;
 675
 676         OBD_CHECK_DEV(obd);
 677
 678         obd->obd_process_conf = 1;
 679         ldt = obd->obd_type->typ_lu;
 680         d = obd->obd_lu_dev;
 681         if (ldt != NULL && d != NULL) {
 682                 struct lu_env env;
 683
 684                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 685                 if (rc == 0) {
 686                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 687                         lu_env_fini(&env);
 688                 }
 689         } else {
 690                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
 691                 rc = OBP(obd, process_config)(obd, datalen, data);
 692         }
 693         OBD_COUNTER_INCREMENT(obd, process_config);
 694         obd->obd_process_conf = 0;
 695
 696         RETURN(rc);
 697 }
 698
 699 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 700                              struct obdo *obdo)
 701 {
 702         int rc;
 703         ENTRY;
 704
 705         EXP_CHECK_DT_OP(exp, create);
 706         EXP_COUNTER_INCREMENT(exp, create);
 707
 708         rc = OBP(exp->exp_obd, create)(env, exp, obdo);
 709         RETURN(rc);
 710 }
 711
 712 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 713                               struct obdo *obdo)
 714 {
 715         int rc;
 716         ENTRY;
 717
 718         EXP_CHECK_DT_OP(exp, destroy);
 719         EXP_COUNTER_INCREMENT(exp, destroy);
 720
 721         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo);
 722         RETURN(rc);
 723 }
 724
 725 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 726                               struct obdo *oa)
 727 {
 728         int rc;
 729
 730         ENTRY;
 731         EXP_CHECK_DT_OP(exp, getattr);
 732         EXP_COUNTER_INCREMENT(exp, getattr);
 733         rc = OBP(exp->exp_obd, getattr)(env, exp, oa);
 734
 735         RETURN(rc);
 736 }
 737
 738 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 739                               struct obdo *oa)
 740 {
 741         int rc;
 742
 743         ENTRY;
 744         EXP_CHECK_DT_OP(exp, setattr);
 745         EXP_COUNTER_INCREMENT(exp, setattr);
 746         rc = OBP(exp->exp_obd, setattr)(env, exp, oa);
 747
 748         RETURN(rc);
 749 }
 750
 751 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 752                                int priority)
 753 {
 754         struct obd_device *obd = imp->imp_obd;
 755         int rc;
 756         ENTRY;
 757
 758         OBD_CHECK_DEV_ACTIVE(obd);
 759         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 760         OBD_COUNTER_INCREMENT(obd, add_conn);
 761
 762         rc = OBP(obd, add_conn)(imp, uuid, priority);
 763         RETURN(rc);
 764 }
 765
 766 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 767 {
 768         struct obd_device *obd = imp->imp_obd;
 769         int rc;
 770         ENTRY;
 771
 772         OBD_CHECK_DEV_ACTIVE(obd);
 773         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 774         OBD_COUNTER_INCREMENT(obd, del_conn);
 775
 776         rc = OBP(obd, del_conn)(imp, uuid);
 777         RETURN(rc);
 778 }
 779
 780 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 781 {
 782         struct obd_uuid *uuid;
 783         ENTRY;
 784
 785         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 786         EXP_COUNTER_INCREMENT(exp, get_uuid);
 787
 788         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 789         RETURN(uuid);
 790 }
 791
 792 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 793  * @param exp New export handle
 794  * @param d Connect data, supported flags are set, flags also understood
 795  *    by obd are returned.
 796  */
 797 static inline int obd_connect(const struct lu_env *env,
 798                               struct obd_export **exp,struct obd_device *obd,
 799                               struct obd_uuid *cluuid,
 800                               struct obd_connect_data *data,
 801                               void *localdata)
 802 {
 803         int rc;
 804         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 805                                                    * check */
 806         ENTRY;
 807
 808         OBD_CHECK_DEV_ACTIVE(obd);
 809         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
 810         OBD_COUNTER_INCREMENT(obd, connect);
 811
 812         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 813         /* check that only subset is granted */
 814         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
 815                                     data->ocd_connect_flags));
 816         RETURN(rc);
 817 }
 818
 819 static inline int obd_reconnect(const struct lu_env *env,
 820                                 struct obd_export *exp,
 821                                 struct obd_device *obd,
 822                                 struct obd_uuid *cluuid,
 823                                 struct obd_connect_data *d,
 824                                 void *localdata)
 825 {
 826         int rc;
 827         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
 828                                                    * check */
 829
 830         ENTRY;
 831
 832         OBD_CHECK_DEV_ACTIVE(obd);
 833         OBD_CHECK_DT_OP(obd, reconnect, 0);
 834         OBD_COUNTER_INCREMENT(obd, reconnect);
 835
 836         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 837         /* check that only subset is granted */
 838         LASSERT(ergo(d != NULL,
 839                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 840         RETURN(rc);
 841 }
 842
 843 static inline int obd_disconnect(struct obd_export *exp)
 844 {
 845         int rc;
 846         ENTRY;
 847
 848         EXP_CHECK_DT_OP(exp, disconnect);
 849         EXP_COUNTER_INCREMENT(exp, disconnect);
 850
 851         rc = OBP(exp->exp_obd, disconnect)(exp);
 852         RETURN(rc);
 853 }
 854
 855 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
 856                                enum lu_cli_type type)
 857 {
 858         int rc;
 859         ENTRY;
 860
 861         OBD_CHECK_DT_OP(obd, fid_init, 0);
 862         OBD_COUNTER_INCREMENT(obd, fid_init);
 863
 864         rc = OBP(obd, fid_init)(obd, exp, type);
 865         RETURN(rc);
 866 }
 867
 868 static inline int obd_fid_fini(struct obd_device *obd)
 869 {
 870         int rc;
 871         ENTRY;
 872
 873         OBD_CHECK_DT_OP(obd, fid_fini, 0);
 874         OBD_COUNTER_INCREMENT(obd, fid_fini);
 875
 876         rc = OBP(obd, fid_fini)(obd);
 877         RETURN(rc);
 878 }
 879
 880 static inline int obd_fid_alloc(const struct lu_env *env,
 881                                 struct obd_export *exp,
 882                                 struct lu_fid *fid,
 883                                 struct md_op_data *op_data)
 884 {
 885         int rc;
 886         ENTRY;
 887
 888         EXP_CHECK_DT_OP(exp, fid_alloc);
 889         EXP_COUNTER_INCREMENT(exp, fid_alloc);
 890
 891         rc = OBP(exp->exp_obd, fid_alloc)(env, exp, fid, op_data);
 892         RETURN(rc);
 893 }
 894
 895 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
 896 {
 897         int rc;
 898         ENTRY;
 899
 900         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
 901         EXP_COUNTER_INCREMENT(exp, ping);
 902
 903         rc = OBP(exp->exp_obd, ping)(env, exp);
 904         RETURN(rc);
 905 }
 906
 907 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
 908 {
 909         int rc;
 910         ENTRY;
 911
 912         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
 913         OBD_COUNTER_INCREMENT(obd, pool_new);
 914
 915         rc = OBP(obd, pool_new)(obd, poolname);
 916         RETURN(rc);
 917 }
 918
 919 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
 920 {
 921         int rc;
 922         ENTRY;
 923
 924         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
 925         OBD_COUNTER_INCREMENT(obd, pool_del);
 926
 927         rc = OBP(obd, pool_del)(obd, poolname);
 928         RETURN(rc);
 929 }
 930
 931 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
 932 {
 933         int rc;
 934         ENTRY;
 935
 936         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
 937         OBD_COUNTER_INCREMENT(obd, pool_add);
 938
 939         rc = OBP(obd, pool_add)(obd, poolname, ostname);
 940         RETURN(rc);
 941 }
 942
 943 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
 944 {
 945         int rc;
 946         ENTRY;
 947
 948         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
 949         OBD_COUNTER_INCREMENT(obd, pool_rem);
 950
 951         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
 952         RETURN(rc);
 953 }
 954
 955 static inline void obd_getref(struct obd_device *obd)
 956 {
 957         ENTRY;
 958         if (OBT(obd) && OBP(obd, getref)) {
 959                 OBD_COUNTER_INCREMENT(obd, getref);
 960                 OBP(obd, getref)(obd);
 961         }
 962         EXIT;
 963 }
 964
 965 static inline void obd_putref(struct obd_device *obd)
 966 {
 967         ENTRY;
 968         if (OBT(obd) && OBP(obd, putref)) {
 969                 OBD_COUNTER_INCREMENT(obd, putref);
 970                 OBP(obd, putref)(obd);
 971         }
 972         EXIT;
 973 }
 974
 975 static inline int obd_init_export(struct obd_export *exp)
 976 {
 977         int rc = 0;
 978
 979         ENTRY;
 980         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
 981             OBP((exp)->exp_obd, init_export))
 982                 rc = OBP(exp->exp_obd, init_export)(exp);
 983         RETURN(rc);
 984 }
 985
 986 static inline int obd_destroy_export(struct obd_export *exp)
 987 {
 988         ENTRY;
 989         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
 990             OBP((exp)->exp_obd, destroy_export))
 991                 OBP(exp->exp_obd, destroy_export)(exp);
 992         RETURN(0);
 993 }
 994
 995 /* @max_age is the oldest time in jiffies that we accept using a cached data.
 996  * If the cache is older than @max_age we will get a new value from the
 997  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
 998 static inline int obd_statfs_async(struct obd_export *exp,
 999                                    struct obd_info *oinfo,
1000                                    __u64 max_age,
1001                                    struct ptlrpc_request_set *rqset)
1002 {
1003         int rc = 0;
1004         struct obd_device *obd;
1005         ENTRY;
1006
1007         if (exp == NULL || exp->exp_obd == NULL)
1008                 RETURN(-EINVAL);
1009
1010         obd = exp->exp_obd;
1011         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1012         OBD_COUNTER_INCREMENT(obd, statfs);
1013
1014         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
1015                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1016         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1017                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1018         } else {
1019                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
1020                        " objects "LPU64"/"LPU64"\n",
1021                        obd->obd_name, &obd->obd_osfs,
1022                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1023                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1024                 spin_lock(&obd->obd_osfs_lock);
1025                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1026                 spin_unlock(&obd->obd_osfs_lock);
1027                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1028                 if (oinfo->oi_cb_up)
1029                         oinfo->oi_cb_up(oinfo, 0);
1030         }
1031         RETURN(rc);
1032 }
1033
1034 static inline int obd_statfs_rqset(struct obd_export *exp,
1035                                    struct obd_statfs *osfs, __u64 max_age,
1036                                    __u32 flags)
1037 {
1038         struct ptlrpc_request_set *set = NULL;
1039         struct obd_info oinfo = {
1040                 .oi_osfs = osfs,
1041                 .oi_flags = flags,
1042         };
1043         int rc = 0;
1044
1045         ENTRY;
1046
1047         set = ptlrpc_prep_set();
1048         if (set == NULL)
1049                 RETURN(-ENOMEM);
1050
1051         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1052         if (rc == 0)
1053                 rc = ptlrpc_set_wait(set);
1054
1055         ptlrpc_set_destroy(set);
1056
1057         RETURN(rc);
1058 }
1059
1060 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1061  * If the cache is older than @max_age we will get a new value from the
1062  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1063 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1064                              struct obd_statfs *osfs, __u64 max_age,
1065                              __u32 flags)
1066 {
1067         int rc = 0;
1068         struct obd_device *obd = exp->exp_obd;
1069         ENTRY;
1070
1071         if (obd == NULL)
1072                 RETURN(-EINVAL);
1073
1074         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1075         OBD_COUNTER_INCREMENT(obd, statfs);
1076
1077         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
1078                obd->obd_osfs_age, max_age);
1079         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1080                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1081                 if (rc == 0) {
1082                         spin_lock(&obd->obd_osfs_lock);
1083                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1084                         obd->obd_osfs_age = cfs_time_current_64();
1085                         spin_unlock(&obd->obd_osfs_lock);
1086                 }
1087         } else {
1088                 CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
1089                        " objects "LPU64"/"LPU64"\n",
1090                        obd->obd_name, &obd->obd_osfs,
1091                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1092                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1093                 spin_lock(&obd->obd_osfs_lock);
1094                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1095                 spin_unlock(&obd->obd_osfs_lock);
1096         }
1097         RETURN(rc);
1098 }
1099
1100 static inline int obd_preprw(const struct lu_env *env, int cmd,
1101                              struct obd_export *exp, struct obdo *oa,
1102                              int objcount, struct obd_ioobj *obj,
1103                              struct niobuf_remote *remote, int *pages,
1104                              struct niobuf_local *local)
1105 {
1106         int rc;
1107
1108         ENTRY;
1109         EXP_CHECK_DT_OP(exp, preprw);
1110         EXP_COUNTER_INCREMENT(exp, preprw);
1111         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1112                                        pages, local);
1113
1114         RETURN(rc);
1115 }
1116
1117 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1118                                struct obd_export *exp, struct obdo *oa,
1119                                int objcount, struct obd_ioobj *obj,
1120                                struct niobuf_remote *rnb, int pages,
1121                                struct niobuf_local *local, int rc)
1122 {
1123         ENTRY;
1124
1125         EXP_CHECK_DT_OP(exp, commitrw);
1126         EXP_COUNTER_INCREMENT(exp, commitrw);
1127         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1128                                          rnb, pages, local, rc);
1129
1130         RETURN(rc);
1131 }
1132
1133 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1134                                 int len, void *karg, void __user *uarg)
1135 {
1136         int rc;
1137         ENTRY;
1138
1139         EXP_CHECK_DT_OP(exp, iocontrol);
1140         EXP_COUNTER_INCREMENT(exp, iocontrol);
1141
1142         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1143         RETURN(rc);
1144 }
1145
1146 static inline void obd_import_event(struct obd_device *obd,
1147                                     struct obd_import *imp,
1148                                     enum obd_import_event event)
1149 {
1150         ENTRY;
1151         if (!obd) {
1152                 CERROR("NULL device\n");
1153                 EXIT;
1154                 return;
1155         }
1156         if (obd->obd_set_up && OBP(obd, import_event)) {
1157                 OBD_COUNTER_INCREMENT(obd, import_event);
1158                 OBP(obd, import_event)(obd, imp, event);
1159         }
1160         EXIT;
1161 }
1162
1163 static inline int obd_notify(struct obd_device *obd,
1164                              struct obd_device *watched,
1165                              enum obd_notify_event ev,
1166                              void *data)
1167 {
1168         int rc;
1169         ENTRY;
1170         OBD_CHECK_DEV(obd);
1171
1172         if (!obd->obd_set_up) {
1173                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1174                 RETURN(-EINVAL);
1175         }
1176
1177         if (!OBP(obd, notify)) {
1178                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1179                 RETURN(-ENOSYS);
1180         }
1181
1182         OBD_COUNTER_INCREMENT(obd, notify);
1183         rc = OBP(obd, notify)(obd, watched, ev, data);
1184         RETURN(rc);
1185 }
1186
1187 static inline int obd_notify_observer(struct obd_device *observer,
1188                                       struct obd_device *observed,
1189                                       enum obd_notify_event ev,
1190                                       void *data)
1191 {
1192         int rc1;
1193         int rc2;
1194
1195         struct obd_notify_upcall *onu;
1196
1197         if (observer->obd_observer)
1198                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1199         else
1200                 rc1 = 0;
1201         /*
1202          * Also, call non-obd listener, if any
1203          */
1204         onu = &observer->obd_upcall;
1205         if (onu->onu_upcall != NULL)
1206                 rc2 = onu->onu_upcall(observer, observed, ev,
1207                                       onu->onu_owner, NULL);
1208         else
1209                 rc2 = 0;
1210
1211         return rc1 ? rc1 : rc2;
1212 }
1213
1214 static inline int obd_quotactl(struct obd_export *exp,
1215                                struct obd_quotactl *oqctl)
1216 {
1217         int rc;
1218         ENTRY;
1219
1220         EXP_CHECK_DT_OP(exp, quotactl);
1221         EXP_COUNTER_INCREMENT(exp, quotactl);
1222
1223         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1224         RETURN(rc);
1225 }
1226
1227 static inline int obd_health_check(const struct lu_env *env,
1228                                    struct obd_device *obd)
1229 {
1230         /* returns: 0 on healthy
1231          *         >0 on unhealthy + reason code/flag
1232          *            however the only suppored reason == 1 right now
1233          *            We'll need to define some better reasons
1234          *            or flags in the future.
1235          *         <0 on error
1236          */
1237         int rc;
1238         ENTRY;
1239
1240         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1241         if (obd == NULL || !OBT(obd)) {
1242                 CERROR("cleaned up obd\n");
1243                 RETURN(-EOPNOTSUPP);
1244         }
1245         if (!obd->obd_set_up || obd->obd_stopping)
1246                 RETURN(0);
1247         if (!OBP(obd, health_check))
1248                 RETURN(0);
1249
1250         rc = OBP(obd, health_check)(env, obd);
1251         RETURN(rc);
1252 }
1253
1254 static inline int obd_register_observer(struct obd_device *obd,
1255                                         struct obd_device *observer)
1256 {
1257         ENTRY;
1258         OBD_CHECK_DEV(obd);
1259         down_write(&obd->obd_observer_link_sem);
1260         if (obd->obd_observer && observer) {
1261                 up_write(&obd->obd_observer_link_sem);
1262                 RETURN(-EALREADY);
1263         }
1264         obd->obd_observer = observer;
1265         up_write(&obd->obd_observer_link_sem);
1266         RETURN(0);
1267 }
1268
1269 /* metadata helpers */
1270 static inline int md_getstatus(struct obd_export *exp, struct lu_fid *fid)
1271 {
1272         int rc;
1273
1274         ENTRY;
1275         EXP_CHECK_MD_OP(exp, getstatus);
1276         EXP_MD_COUNTER_INCREMENT(exp, getstatus);
1277         rc = MDP(exp->exp_obd, getstatus)(exp, fid);
1278
1279         RETURN(rc);
1280 }
1281
1282 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1283                              struct ptlrpc_request **request)
1284 {
1285         int rc;
1286         ENTRY;
1287         EXP_CHECK_MD_OP(exp, getattr);
1288         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1289         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1290         RETURN(rc);
1291 }
1292
1293 static inline int md_null_inode(struct obd_export *exp,
1294                                    const struct lu_fid *fid)
1295 {
1296         int rc;
1297         ENTRY;
1298         EXP_CHECK_MD_OP(exp, null_inode);
1299         EXP_MD_COUNTER_INCREMENT(exp, null_inode);
1300         rc = MDP(exp->exp_obd, null_inode)(exp, fid);
1301         RETURN(rc);
1302 }
1303
1304 static inline int md_find_cbdata(struct obd_export *exp,
1305                                  const struct lu_fid *fid,
1306                                  ldlm_iterator_t it, void *data)
1307 {
1308         int rc;
1309         ENTRY;
1310         EXP_CHECK_MD_OP(exp, find_cbdata);
1311         EXP_MD_COUNTER_INCREMENT(exp, find_cbdata);
1312         rc = MDP(exp->exp_obd, find_cbdata)(exp, fid, it, data);
1313         RETURN(rc);
1314 }
1315
1316 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1317                            struct md_open_data *mod,
1318                            struct ptlrpc_request **request)
1319 {
1320         int rc;
1321         ENTRY;
1322         EXP_CHECK_MD_OP(exp, close);
1323         EXP_MD_COUNTER_INCREMENT(exp, close);
1324         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1325         RETURN(rc);
1326 }
1327
1328 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1329                             const void *data, size_t datalen, umode_t mode,
1330                             uid_t uid, gid_t gid, cfs_cap_t cap_effective,
1331                             __u64 rdev, struct ptlrpc_request **request)
1332 {
1333         int rc;
1334         ENTRY;
1335         EXP_CHECK_MD_OP(exp, create);
1336         EXP_MD_COUNTER_INCREMENT(exp, create);
1337         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1338                                        uid, gid, cap_effective, rdev, request);
1339         RETURN(rc);
1340 }
1341
1342 static inline int md_enqueue(struct obd_export *exp,
1343                              struct ldlm_enqueue_info *einfo,
1344                              const union ldlm_policy_data *policy,
1345                              struct lookup_intent *it,
1346                              struct md_op_data *op_data,
1347                              struct lustre_handle *lockh,
1348                              __u64 extra_lock_flags)
1349 {
1350         int rc;
1351         ENTRY;
1352         EXP_CHECK_MD_OP(exp, enqueue);
1353         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1354         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, policy, it, op_data, lockh,
1355                                         extra_lock_flags);
1356         RETURN(rc);
1357 }
1358
1359 static inline int md_getattr_name(struct obd_export *exp,
1360                                   struct md_op_data *op_data,
1361                                   struct ptlrpc_request **request)
1362 {
1363         int rc;
1364         ENTRY;
1365         EXP_CHECK_MD_OP(exp, getattr_name);
1366         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1367         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1368         RETURN(rc);
1369 }
1370
1371 static inline int md_intent_lock(struct obd_export *exp,
1372                                  struct md_op_data *op_data,
1373                                  struct lookup_intent *it,
1374                                  struct ptlrpc_request **reqp,
1375                                  ldlm_blocking_callback cb_blocking,
1376                                  __u64 extra_lock_flags)
1377 {
1378         int rc;
1379         ENTRY;
1380         EXP_CHECK_MD_OP(exp, intent_lock);
1381         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1382         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, it, reqp, cb_blocking,
1383                                             extra_lock_flags);
1384         RETURN(rc);
1385 }
1386
1387 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1388                           struct ptlrpc_request **request)
1389 {
1390         int rc;
1391         ENTRY;
1392         EXP_CHECK_MD_OP(exp, link);
1393         EXP_MD_COUNTER_INCREMENT(exp, link);
1394         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1395         RETURN(rc);
1396 }
1397
1398 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1399                             const char *old, size_t oldlen, const char *new,
1400                             size_t newlen, struct ptlrpc_request **request)
1401 {
1402         int rc;
1403         ENTRY;
1404         EXP_CHECK_MD_OP(exp, rename);
1405         EXP_MD_COUNTER_INCREMENT(exp, rename);
1406         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1407                                        newlen, request);
1408         RETURN(rc);
1409 }
1410
1411 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
1412                              void *ea, size_t ealen,
1413                              struct ptlrpc_request **request)
1414 {
1415         int rc;
1416         ENTRY;
1417         EXP_CHECK_MD_OP(exp, setattr);
1418         EXP_MD_COUNTER_INCREMENT(exp, setattr);
1419         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen, request);
1420         RETURN(rc);
1421 }
1422
1423 static inline int md_fsync(struct obd_export *exp, const struct lu_fid *fid,
1424                            struct ptlrpc_request **request)
1425 {
1426         int rc;
1427
1428         ENTRY;
1429         EXP_CHECK_MD_OP(exp, fsync);
1430         EXP_MD_COUNTER_INCREMENT(exp, fsync);
1431         rc = MDP(exp->exp_obd, fsync)(exp, fid, request);
1432
1433         RETURN(rc);
1434 }
1435
1436 static inline int md_read_page(struct obd_export *exp,
1437                                struct md_op_data *op_data,
1438                                struct md_callback *cb_op,
1439                                __u64  hash_offset,
1440                                struct page **ppage)
1441 {
1442         int rc;
1443         ENTRY;
1444         EXP_CHECK_MD_OP(exp, read_page);
1445         EXP_MD_COUNTER_INCREMENT(exp, read_page);
1446         rc = MDP(exp->exp_obd, read_page)(exp, op_data, cb_op, hash_offset,
1447                                           ppage);
1448         RETURN(rc);
1449 }
1450
1451 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
1452                             struct ptlrpc_request **request)
1453 {
1454         int rc;
1455         ENTRY;
1456         EXP_CHECK_MD_OP(exp, unlink);
1457         EXP_MD_COUNTER_INCREMENT(exp, unlink);
1458         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
1459         RETURN(rc);
1460 }
1461
1462 static inline int md_get_lustre_md(struct obd_export *exp,
1463                                    struct ptlrpc_request *req,
1464                                    struct obd_export *dt_exp,
1465                                    struct obd_export *md_exp,
1466                                    struct lustre_md *md)
1467 {
1468         ENTRY;
1469         EXP_CHECK_MD_OP(exp, get_lustre_md);
1470         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
1471         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
1472 }
1473
1474 static inline int md_free_lustre_md(struct obd_export *exp,
1475                                     struct lustre_md *md)
1476 {
1477         ENTRY;
1478         EXP_CHECK_MD_OP(exp, free_lustre_md);
1479         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
1480         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
1481 }
1482
1483 static inline int md_merge_attr(struct obd_export *exp,
1484                                 const struct lmv_stripe_md *lsm,
1485                                 struct cl_attr *attr,
1486                                 ldlm_blocking_callback cb)
1487 {
1488         ENTRY;
1489         EXP_CHECK_MD_OP(exp, merge_attr);
1490         EXP_MD_COUNTER_INCREMENT(exp, merge_attr);
1491         RETURN(MDP(exp->exp_obd, merge_attr)(exp, lsm, attr, cb));
1492 }
1493
1494 static inline int md_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1495                               u64 valid, const char *name,
1496                               const char *input, int input_size,
1497                               int output_size, int flags, __u32 suppgid,
1498                               struct ptlrpc_request **request)
1499 {
1500         ENTRY;
1501         EXP_CHECK_MD_OP(exp, setxattr);
1502         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
1503         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, valid, name, input,
1504                                            input_size, output_size, flags,
1505                                            suppgid, request));
1506 }
1507
1508 static inline int md_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1509                               u64 valid, const char *name,
1510                               const char *input, int input_size,
1511                               int output_size, int flags,
1512                               struct ptlrpc_request **request)
1513 {
1514         ENTRY;
1515         EXP_CHECK_MD_OP(exp, getxattr);
1516         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
1517         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, valid, name, input,
1518                                            input_size, output_size, flags,
1519                                            request));
1520 }
1521
1522 static inline int md_set_open_replay_data(struct obd_export *exp,
1523                                           struct obd_client_handle *och,
1524                                           struct lookup_intent *it)
1525 {
1526         ENTRY;
1527         EXP_CHECK_MD_OP(exp, set_open_replay_data);
1528         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
1529         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, it));
1530 }
1531
1532 static inline int md_clear_open_replay_data(struct obd_export *exp,
1533                                             struct obd_client_handle *och)
1534 {
1535         ENTRY;
1536         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
1537         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
1538         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
1539 }
1540
1541 static inline int md_set_lock_data(struct obd_export *exp,
1542                                    __u64 *lockh, void *data, __u64 *bits)
1543 {
1544         ENTRY;
1545         EXP_CHECK_MD_OP(exp, set_lock_data);
1546         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
1547         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
1548 }
1549
1550 static inline
1551 int md_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
1552                      union ldlm_policy_data *policy, enum ldlm_mode mode,
1553                      enum ldlm_cancel_flags cancel_flags, void *opaque)
1554 {
1555         int rc;
1556         ENTRY;
1557
1558         EXP_CHECK_MD_OP(exp, cancel_unused);
1559         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
1560
1561         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
1562                                               cancel_flags, opaque);
1563         RETURN(rc);
1564 }
1565
1566 static inline enum ldlm_mode md_lock_match(struct obd_export *exp, __u64 flags,
1567                                            const struct lu_fid *fid,
1568                                            enum ldlm_type type,
1569                                            union ldlm_policy_data *policy,
1570                                            enum ldlm_mode mode,
1571                                            struct lustre_handle *lockh)
1572 {
1573         ENTRY;
1574         EXP_CHECK_MD_OP(exp, lock_match);
1575         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
1576         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
1577                                              policy, mode, lockh));
1578 }
1579
1580 static inline int md_init_ea_size(struct obd_export *exp, __u32 ea_size,
1581                                   __u32 def_ea_size)
1582 {
1583         ENTRY;
1584         EXP_CHECK_MD_OP(exp, init_ea_size);
1585         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
1586         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, ea_size, def_ea_size));
1587 }
1588
1589 static inline int md_get_remote_perm(struct obd_export *exp,
1590                                      const struct lu_fid *fid, u32 suppgid,
1591                                      struct ptlrpc_request **request)
1592 {
1593         ENTRY;
1594         EXP_CHECK_MD_OP(exp, get_remote_perm);
1595         EXP_MD_COUNTER_INCREMENT(exp, get_remote_perm);
1596
1597         RETURN(MDP(exp->exp_obd, get_remote_perm)(exp, fid, suppgid, request));
1598 }
1599
1600 static inline int md_intent_getattr_async(struct obd_export *exp,
1601                                           struct md_enqueue_info *minfo)
1602 {
1603         int rc;
1604         ENTRY;
1605         EXP_CHECK_MD_OP(exp, intent_getattr_async);
1606         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
1607         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo);
1608         RETURN(rc);
1609 }
1610
1611 static inline int md_revalidate_lock(struct obd_export *exp,
1612                                      struct lookup_intent *it,
1613                                      struct lu_fid *fid, __u64 *bits)
1614 {
1615         int rc;
1616         ENTRY;
1617         EXP_CHECK_MD_OP(exp, revalidate_lock);
1618         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
1619         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
1620         RETURN(rc);
1621 }
1622
1623 static inline int md_get_fid_from_lsm(struct obd_export *exp,
1624                                       const struct lmv_stripe_md *lsm,
1625                                       const char *name, int namelen,
1626                                       struct lu_fid *fid)
1627 {
1628         int rc;
1629         ENTRY;
1630         EXP_CHECK_MD_OP(exp, get_fid_from_lsm);
1631         EXP_MD_COUNTER_INCREMENT(exp, get_fid_from_lsm);
1632         rc = MDP(exp->exp_obd, get_fid_from_lsm)(exp, lsm, name, namelen, fid);
1633         RETURN(rc);
1634 }
1635
1636
1637 /* Unpack an MD struct from disk to in-memory format.
1638  * Returns +ve size of unpacked MD (0 for free), or -ve error.
1639  *
1640  * If *plsm != NULL and lmm == NULL then *lsm will be freed.
1641  * If *plsm == NULL then it will be allocated.
1642  */
1643 static inline int md_unpackmd(struct obd_export *exp,
1644                               struct lmv_stripe_md **plsm,
1645                               const union lmv_mds_md *lmm, size_t lmm_size)
1646 {
1647         int rc;
1648         ENTRY;
1649         EXP_CHECK_MD_OP(exp, unpackmd);
1650         EXP_MD_COUNTER_INCREMENT(exp, unpackmd);
1651         rc = MDP(exp->exp_obd, unpackmd)(exp, plsm, lmm, lmm_size);
1652         RETURN(rc);
1653 }
1654
1655 /* OBD Metadata Support */
1656
1657 extern int obd_init_caches(void);
1658 extern void obd_cleanup_caches(void);
1659
1660 /* support routines */
1661 extern struct kmem_cache *obdo_cachep;
1662
1663 #define OBDO_ALLOC(ptr)                                                       \
1664 do {                                                                          \
1665         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, GFP_NOFS);             \
1666 } while(0)
1667
1668 #define OBDO_FREE(ptr)                                                        \
1669 do {                                                                          \
1670         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1671 } while(0)
1672
1673
1674 typedef int (*register_lwp_cb)(void *data);
1675
1676 struct lwp_register_item {
1677         struct obd_export **lri_exp;
1678         register_lwp_cb     lri_cb_func;
1679         void               *lri_cb_data;
1680         struct list_head            lri_list;
1681         char                lri_name[MTI_NAME_MAXLEN];
1682 };
1683
1684 /* I'm as embarrassed about this as you are.
1685  *
1686  * <shaver> // XXX do not look into _superhack with remaining eye
1687  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1688 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1689
1690 /* obd_mount.c */
1691 #ifdef HAVE_SERVER_SUPPORT
1692 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
1693                              register_lwp_cb cb_func, void *cb_data);
1694 void lustre_deregister_lwp_item(struct obd_export **exp);
1695 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx);
1696 void lustre_notify_lwp_list(struct obd_export *exp);
1697 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx);
1698 #endif /* HAVE_SERVER_SUPPORT */
1699 int lustre_register_fs(void);
1700 int lustre_unregister_fs(void);
1701 int lustre_check_exclusion(struct super_block *sb, char *svname);
1702
1703 /* sysctl.c */
1704 extern void obd_sysctl_init (void);
1705 extern void obd_sysctl_clean (void);
1706
1707 /* uuid.c  */
1708 typedef __u8 class_uuid_t[16];
1709 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
1710
1711 /* lustre_peer.c    */
1712 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
1713 int class_add_uuid(const char *uuid, __u64 nid);
1714 int class_del_uuid (const char *uuid);
1715 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
1716 void class_init_uuidlist(void);
1717 void class_exit_uuidlist(void);
1718
1719 /* class_obd.c */
1720 extern char obd_jobid_node[];
1721
1722 /* prng.c */
1723 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
1724
1725 /* statfs_pack.c */
1726 struct kstatfs;
1727 void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
1728 void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);
1729
1730 /* root squash info */
1731 struct rw_semaphore;
1732 struct root_squash_info {
1733         uid_t                   rsi_uid;
1734         gid_t                   rsi_gid;
1735         struct list_head        rsi_nosquash_nids;
1736         struct rw_semaphore     rsi_sem;
1737 };
1738
1739 int server_name2index(const char *svname, __u32 *idx, const char **endptr);
1740
1741 /* linux-module.c */
1742 extern struct miscdevice obd_psdev;
1743 int class_procfs_init(void);
1744 int class_procfs_clean(void);
1745
1746 #endif /* __LINUX_OBD_CLASS_H */