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
 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, u64 valid);
 324
 325 void obdo_cpy_md(struct obdo *dst, const struct obdo *src, u64 valid);
 326 void obdo_to_ioobj(const struct obdo *oa, struct obd_ioobj *ioobj);
 327
 328 #define OBT(dev)        (dev)->obd_type
 329 #define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 330 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
 331 #define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
 332
 333 /* Ensure obd_setup: used for cleanup which must be called
 334    while obd is stopping */
 335 #define OBD_CHECK_DEV(obd)                                      \
 336 do {                                                            \
 337         if (!(obd)) {                                           \
 338                 CERROR("NULL device\n");                        \
 339                 RETURN(-ENODEV);                                \
 340         }                                                       \
 341 } while (0)
 342
 343 /* ensure obd_setup and !obd_stopping */
 344 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 345 do {                                                            \
 346         OBD_CHECK_DEV(obd);                                     \
 347         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 348                 CERROR("Device %d not setup\n",                 \
 349                        (obd)->obd_minor);                       \
 350                 RETURN(-ENODEV);                                \
 351         }                                                       \
 352 } while (0)
 353
 354
 355 #ifdef CONFIG_PROC_FS
 356 #define OBD_COUNTER_OFFSET(op)                                                 \
 357         ((offsetof(struct obd_ops, o_ ## op) -                                 \
 358           offsetof(struct obd_ops, o_iocontrol))                               \
 359          / sizeof(((struct obd_ops *)NULL)->o_iocontrol))
 360
 361 /* The '- 1' below is for o_owner. */
 362 #define NUM_OBD_STATS                                                          \
 363         (sizeof(struct obd_ops) /                                              \
 364          sizeof(((struct obd_ops *)NULL)->o_iocontrol) - 1)
 365
 366 #define OBD_COUNTER_INCREMENT(obd, op)                                         \
 367         lprocfs_counter_incr((obd)->obd_stats,                                 \
 368                              (obd)->obd_cntr_base + OBD_COUNTER_OFFSET(op))
 369
 370 #define EXP_COUNTER_INCREMENT(exp, op)                                         \
 371         do {                                                                   \
 372                 unsigned int _off;                                             \
 373                 _off = (exp)->exp_obd->obd_cntr_base + OBD_COUNTER_OFFSET(op); \
 374                 lprocfs_counter_incr((exp)->exp_obd->obd_stats, _off);         \
 375                 if ((exp)->exp_obd->obd_uses_nid_stats &&                      \
 376                     (exp)->exp_nid_stats != NULL)                              \
 377                         lprocfs_counter_incr((exp)->exp_nid_stats->nid_stats,  \
 378                                              _off);                            \
 379         } while (0)
 380
 381 #define _MD_COUNTER_OFFSET(m_op)                                               \
 382         ((offsetof(struct md_ops, m_op) -                                      \
 383           offsetof(struct md_ops, MD_STATS_FIRST_OP)) /                        \
 384          sizeof(((struct md_ops *)NULL)->MD_STATS_FIRST_OP))
 385
 386 #define MD_COUNTER_OFFSET(op) _MD_COUNTER_OFFSET(m_ ## op)
 387
 388 #define NUM_MD_STATS                                                           \
 389         (_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) -                                \
 390          _MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) + 1)
 391
 392 /* Note that we only increment md counters for ops whose offset is less
 393  * than NUM_MD_STATS. This is explained in a comment in the definition
 394  * of struct md_ops. */
 395 #define EXP_MD_COUNTER_INCREMENT(exp, op)                                      \
 396         do {                                                                   \
 397                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS)                      \
 398                         lprocfs_counter_incr((exp)->exp_obd->obd_md_stats,     \
 399                                         (exp)->exp_obd->obd_md_cntr_base +     \
 400                                         MD_COUNTER_OFFSET(op));                \
 401         } while (0)
 402
 403 #else
 404 #define OBD_COUNTER_OFFSET(op)
 405 #define OBD_COUNTER_INCREMENT(obd, op)
 406 #define EXP_COUNTER_INCREMENT(exp, op)
 407 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 408 #endif
 409
 410 static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
 411 {
 412         /* Always add in ldlm_stats */
 413         tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC
 414                                                   ,LPROCFS_STATS_FLAG_NOPERCPU);
 415         if (tmp->nid_ldlm_stats == NULL)
 416                 return -ENOMEM;
 417
 418         lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
 419
 420         return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
 421                                       tmp->nid_ldlm_stats);
 422 }
 423
 424 #define EXP_CHECK_MD_OP(exp, op)                                \
 425 do {                                                            \
 426         if ((exp) == NULL) {                                    \
 427                 CERROR("obd_" #op ": NULL export\n");           \
 428                 RETURN(-ENODEV);                                \
 429         }                                                       \
 430         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 431                 CERROR("obd_" #op ": cleaned up obd\n");        \
 432                 RETURN(-EOPNOTSUPP);                            \
 433         }                                                       \
 434         if (!OBT((exp)->exp_obd) || !MDP((exp)->exp_obd, op)) { \
 435                 CERROR("obd_" #op ": dev %s/%d no operation\n", \
 436                        (exp)->exp_obd->obd_name,                \
 437                        (exp)->exp_obd->obd_minor);              \
 438                 RETURN(-EOPNOTSUPP);                            \
 439         }                                                       \
 440 } while (0)
 441
 442
 443 #define OBD_CHECK_DT_OP(obd, op, err)                           \
 444 do {                                                            \
 445         if (!OBT(obd) || !OBP((obd), op)) {                     \
 446                 if (err)                                        \
 447                         CERROR("obd_" #op ": dev %d no operation\n",    \
 448                                obd->obd_minor);                 \
 449                 RETURN(err);                                    \
 450         }                                                       \
 451 } while (0)
 452
 453 #define EXP_CHECK_DT_OP(exp, op)                                \
 454 do {                                                            \
 455         if ((exp) == NULL) {                                    \
 456                 CERROR("obd_" #op ": NULL export\n");           \
 457                 RETURN(-ENODEV);                                \
 458         }                                                       \
 459         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 460                 CERROR("obd_" #op ": cleaned up obd\n");        \
 461                 RETURN(-EOPNOTSUPP);                            \
 462         }                                                       \
 463         if (!OBT((exp)->exp_obd) || !OBP((exp)->exp_obd, op)) { \
 464                 CERROR("obd_" #op ": dev %d no operation\n",    \
 465                        (exp)->exp_obd->obd_minor);              \
 466                 RETURN(-EOPNOTSUPP);                            \
 467         }                                                       \
 468 } while (0)
 469
 470 #define CTXT_CHECK_OP(ctxt, op, err)                                 \
 471 do {                                                                 \
 472         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {             \
 473                 if (err)                                             \
 474                         CERROR("lop_" #op ": dev %d no operation\n", \
 475                                ctxt->loc_obd->obd_minor);            \
 476                 RETURN(err);                                         \
 477         }                                                            \
 478 } while (0)
 479
 480 static inline int class_devno_max(void)
 481 {
 482         return MAX_OBD_DEVICES;
 483 }
 484
 485 static inline int obd_get_info(const struct lu_env *env, struct obd_export *exp,
 486                                __u32 keylen, void *key,
 487                                __u32 *vallen, void *val)
 488 {
 489         int rc;
 490         ENTRY;
 491
 492         EXP_CHECK_DT_OP(exp, get_info);
 493         EXP_COUNTER_INCREMENT(exp, get_info);
 494
 495         rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val);
 496         RETURN(rc);
 497 }
 498
 499 static inline int obd_set_info_async(const struct lu_env *env,
 500                                      struct obd_export *exp,
 501                                      __u32 keylen, void *key,
 502                                      __u32 vallen, void *val,
 503                                      struct ptlrpc_request_set *set)
 504 {
 505         int rc;
 506         ENTRY;
 507
 508         EXP_CHECK_DT_OP(exp, set_info_async);
 509         EXP_COUNTER_INCREMENT(exp, set_info_async);
 510
 511         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 512                                                val, set);
 513         RETURN(rc);
 514 }
 515
 516 /*
 517  * obd-lu integration.
 518  *
 519  * Functionality is being moved into new lu_device-based layering, but some
 520  * pieces of configuration process are still based on obd devices.
 521  *
 522  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 523  * subsume ->o_setup() methods of obd devices they replace. The same for
 524  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 525  * result, obd_setup() and obd_process_config() branch and call one XOR
 526  * another.
 527  *
 528  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 529  * lu_device_type_operations::ldto_device_free() fully implement the
 530  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 531  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 532  */
 533
 534 #define DECLARE_LU_VARS(ldt, d)                 \
 535         struct lu_device_type *ldt;       \
 536         struct lu_device *d
 537
 538 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 539 {
 540         int rc;
 541         DECLARE_LU_VARS(ldt, d);
 542         ENTRY;
 543
 544         ldt = obd->obd_type->typ_lu;
 545         if (ldt != NULL) {
 546                 struct lu_context  session_ctx;
 547                 struct lu_env env;
 548                 lu_context_init(&session_ctx, LCT_SESSION | LCT_SERVER_SESSION);
 549                 session_ctx.lc_thread = NULL;
 550                 lu_context_enter(&session_ctx);
 551
 552                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 553                 if (rc == 0) {
 554                         env.le_ses = &session_ctx;
 555                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 556                         lu_env_fini(&env);
 557                         if (!IS_ERR(d)) {
 558                                 obd->obd_lu_dev = d;
 559                                 d->ld_obd = obd;
 560                                 rc = 0;
 561                         } else
 562                                 rc = PTR_ERR(d);
 563                 }
 564                 lu_context_exit(&session_ctx);
 565                 lu_context_fini(&session_ctx);
 566
 567         } else {
 568                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
 569                 OBD_COUNTER_INCREMENT(obd, setup);
 570                 rc = OBP(obd, setup)(obd, cfg);
 571         }
 572         RETURN(rc);
 573 }
 574
 575 static inline int obd_precleanup(struct obd_device *obd,
 576                                  enum obd_cleanup_stage cleanup_stage)
 577 {
 578         int rc;
 579         DECLARE_LU_VARS(ldt, d);
 580         ENTRY;
 581
 582         OBD_CHECK_DEV(obd);
 583         ldt = obd->obd_type->typ_lu;
 584         d = obd->obd_lu_dev;
 585         if (ldt != NULL && d != NULL) {
 586                 if (cleanup_stage == OBD_CLEANUP_EXPORTS) {
 587                         struct lu_env env;
 588
 589                         rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 590                         if (rc == 0) {
 591                                 ldt->ldt_ops->ldto_device_fini(&env, d);
 592                                 lu_env_fini(&env);
 593                         }
 594                 }
 595         }
 596         OBD_CHECK_DT_OP(obd, precleanup, 0);
 597         OBD_COUNTER_INCREMENT(obd, precleanup);
 598
 599         rc = OBP(obd, precleanup)(obd, cleanup_stage);
 600         RETURN(rc);
 601 }
 602
 603 static inline int obd_cleanup(struct obd_device *obd)
 604 {
 605         int rc;
 606         DECLARE_LU_VARS(ldt, d);
 607         ENTRY;
 608
 609         OBD_CHECK_DEV(obd);
 610
 611         ldt = obd->obd_type->typ_lu;
 612         d = obd->obd_lu_dev;
 613         if (ldt != NULL && d != NULL) {
 614                 struct lu_env env;
 615
 616                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 617                 if (rc == 0) {
 618                         ldt->ldt_ops->ldto_device_free(&env, d);
 619                         lu_env_fini(&env);
 620                         obd->obd_lu_dev = NULL;
 621                 }
 622         }
 623         OBD_CHECK_DT_OP(obd, cleanup, 0);
 624         OBD_COUNTER_INCREMENT(obd, cleanup);
 625
 626         rc = OBP(obd, cleanup)(obd);
 627         RETURN(rc);
 628 }
 629
 630 static inline void obd_cleanup_client_import(struct obd_device *obd)
 631 {
 632         ENTRY;
 633
 634         /* If we set up but never connected, the
 635            client import will not have been cleaned. */
 636         down_write(&obd->u.cli.cl_sem);
 637         if (obd->u.cli.cl_import) {
 638                 struct obd_import *imp;
 639                 imp = obd->u.cli.cl_import;
 640                 CDEBUG(D_CONFIG, "%s: client import never connected\n",
 641                        obd->obd_name);
 642                 ptlrpc_invalidate_import(imp);
 643                 if (imp->imp_rq_pool) {
 644                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
 645                         imp->imp_rq_pool = NULL;
 646                 }
 647                 client_destroy_import(imp);
 648                 obd->u.cli.cl_import = NULL;
 649         }
 650         up_write(&obd->u.cli.cl_sem);
 651
 652         EXIT;
 653 }
 654
 655 static inline int
 656 obd_process_config(struct obd_device *obd, int datalen, void *data)
 657 {
 658         int rc;
 659         DECLARE_LU_VARS(ldt, d);
 660         ENTRY;
 661
 662         OBD_CHECK_DEV(obd);
 663
 664         obd->obd_process_conf = 1;
 665         ldt = obd->obd_type->typ_lu;
 666         d = obd->obd_lu_dev;
 667         if (ldt != NULL && d != NULL) {
 668                 struct lu_env env;
 669
 670                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 671                 if (rc == 0) {
 672                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 673                         lu_env_fini(&env);
 674                 }
 675         } else {
 676                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
 677                 rc = OBP(obd, process_config)(obd, datalen, data);
 678         }
 679         OBD_COUNTER_INCREMENT(obd, process_config);
 680         obd->obd_process_conf = 0;
 681
 682         RETURN(rc);
 683 }
 684
 685 /* Pack an in-memory MD struct for storage on disk.
 686  * Returns +ve size of packed MD (0 for free), or -ve error.
 687  *
 688  * If @disk_tgt == NULL, MD size is returned (max size if @mem_src == NULL).
 689  * If @*disk_tgt != NULL and @mem_src == NULL, @*disk_tgt will be freed.
 690  * If @*disk_tgt == NULL, it will be allocated
 691  */
 692 static inline int obd_packmd(struct obd_export *exp,
 693                              struct lov_mds_md **disk_tgt,
 694                              struct lov_stripe_md *mem_src)
 695 {
 696         int rc;
 697         ENTRY;
 698
 699         EXP_CHECK_DT_OP(exp, packmd);
 700         EXP_COUNTER_INCREMENT(exp, packmd);
 701
 702         rc = OBP(exp->exp_obd, packmd)(exp, disk_tgt, mem_src);
 703         RETURN(rc);
 704 }
 705
 706 static inline int obd_size_diskmd(struct obd_export *exp,
 707                                   struct lov_stripe_md *mem_src)
 708 {
 709         return obd_packmd(exp, NULL, mem_src);
 710 }
 711
 712 static inline int obd_free_diskmd(struct obd_export *exp,
 713                                   struct lov_mds_md **disk_tgt)
 714 {
 715         LASSERT(disk_tgt);
 716         LASSERT(*disk_tgt);
 717         /*
 718          * LU-2590, for caller's convenience, *disk_tgt could be host
 719          * endianness, it needs swab to LE if necessary, while just
 720          * lov_mds_md header needs it for figuring out how much memory
 721          * needs to be freed.
 722          */
 723         if ((cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) &&
 724             (((*disk_tgt)->lmm_magic == LOV_MAGIC_V1) ||
 725              ((*disk_tgt)->lmm_magic == LOV_MAGIC_V3)))
 726                 lustre_swab_lov_mds_md(*disk_tgt);
 727         return obd_packmd(exp, disk_tgt, NULL);
 728 }
 729
 730 /* Unpack an MD struct from disk to in-memory format.
 731  * Returns +ve size of unpacked MD (0 for free), or -ve error.
 732  *
 733  * If @mem_tgt == NULL, MD size is returned (max size if @disk_src == NULL).
 734  * If @*mem_tgt != NULL and @disk_src == NULL, @*mem_tgt will be freed.
 735  * If @*mem_tgt == NULL, it will be allocated
 736  */
 737 static inline int obd_unpackmd(struct obd_export *exp,
 738                                struct lov_stripe_md **mem_tgt,
 739                                struct lov_mds_md *disk_src,
 740                                int disk_len)
 741 {
 742         int rc;
 743         ENTRY;
 744
 745         EXP_CHECK_DT_OP(exp, unpackmd);
 746         EXP_COUNTER_INCREMENT(exp, unpackmd);
 747
 748         rc = OBP(exp->exp_obd, unpackmd)(exp, mem_tgt, disk_src, disk_len);
 749         RETURN(rc);
 750 }
 751
 752 static inline int obd_free_memmd(struct obd_export *exp,
 753                                  struct lov_stripe_md **mem_tgt)
 754 {
 755         int rc;
 756
 757         LASSERT(mem_tgt);
 758         LASSERT(*mem_tgt);
 759         rc = obd_unpackmd(exp, mem_tgt, NULL, 0);
 760         *mem_tgt = NULL;
 761         return rc;
 762 }
 763
 764 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 765                              struct obdo *obdo, struct obd_trans_info *oti)
 766 {
 767         int rc;
 768         ENTRY;
 769
 770         EXP_CHECK_DT_OP(exp, create);
 771         EXP_COUNTER_INCREMENT(exp, create);
 772
 773         rc = OBP(exp->exp_obd, create)(env, exp, obdo, oti);
 774         RETURN(rc);
 775 }
 776
 777 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 778                               struct obdo *obdo, struct obd_trans_info *oti)
 779 {
 780         int rc;
 781         ENTRY;
 782
 783         EXP_CHECK_DT_OP(exp, destroy);
 784         EXP_COUNTER_INCREMENT(exp, destroy);
 785
 786         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo, oti);
 787         RETURN(rc);
 788 }
 789
 790 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 791                               struct obd_info *oinfo)
 792 {
 793         int rc;
 794         ENTRY;
 795
 796         EXP_CHECK_DT_OP(exp, getattr);
 797         EXP_COUNTER_INCREMENT(exp, getattr);
 798
 799         rc = OBP(exp->exp_obd, getattr)(env, exp, oinfo);
 800         RETURN(rc);
 801 }
 802
 803 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 804                               struct obd_info *oinfo,
 805                               struct obd_trans_info *oti)
 806 {
 807         int rc;
 808         ENTRY;
 809
 810         EXP_CHECK_DT_OP(exp, setattr);
 811         EXP_COUNTER_INCREMENT(exp, setattr);
 812
 813         rc = OBP(exp->exp_obd, setattr)(env, exp, oinfo, oti);
 814         RETURN(rc);
 815 }
 816
 817 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 818                                int priority)
 819 {
 820         struct obd_device *obd = imp->imp_obd;
 821         int rc;
 822         ENTRY;
 823
 824         OBD_CHECK_DEV_ACTIVE(obd);
 825         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 826         OBD_COUNTER_INCREMENT(obd, add_conn);
 827
 828         rc = OBP(obd, add_conn)(imp, uuid, priority);
 829         RETURN(rc);
 830 }
 831
 832 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 833 {
 834         struct obd_device *obd = imp->imp_obd;
 835         int rc;
 836         ENTRY;
 837
 838         OBD_CHECK_DEV_ACTIVE(obd);
 839         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 840         OBD_COUNTER_INCREMENT(obd, del_conn);
 841
 842         rc = OBP(obd, del_conn)(imp, uuid);
 843         RETURN(rc);
 844 }
 845
 846 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 847 {
 848         struct obd_uuid *uuid;
 849         ENTRY;
 850
 851         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 852         EXP_COUNTER_INCREMENT(exp, get_uuid);
 853
 854         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 855         RETURN(uuid);
 856 }
 857
 858 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 859  * @param exp New export handle
 860  * @param d Connect data, supported flags are set, flags also understood
 861  *    by obd are returned.
 862  */
 863 static inline int obd_connect(const struct lu_env *env,
 864                               struct obd_export **exp,struct obd_device *obd,
 865                               struct obd_uuid *cluuid,
 866                               struct obd_connect_data *data,
 867                               void *localdata)
 868 {
 869         int rc;
 870         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 871                                                    * check */
 872         ENTRY;
 873
 874         OBD_CHECK_DEV_ACTIVE(obd);
 875         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
 876         OBD_COUNTER_INCREMENT(obd, connect);
 877
 878         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 879         /* check that only subset is granted */
 880         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
 881                                     data->ocd_connect_flags));
 882         RETURN(rc);
 883 }
 884
 885 static inline int obd_reconnect(const struct lu_env *env,
 886                                 struct obd_export *exp,
 887                                 struct obd_device *obd,
 888                                 struct obd_uuid *cluuid,
 889                                 struct obd_connect_data *d,
 890                                 void *localdata)
 891 {
 892         int rc;
 893         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
 894                                                    * check */
 895
 896         ENTRY;
 897
 898         OBD_CHECK_DEV_ACTIVE(obd);
 899         OBD_CHECK_DT_OP(obd, reconnect, 0);
 900         OBD_COUNTER_INCREMENT(obd, reconnect);
 901
 902         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 903         /* check that only subset is granted */
 904         LASSERT(ergo(d != NULL,
 905                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 906         RETURN(rc);
 907 }
 908
 909 static inline int obd_disconnect(struct obd_export *exp)
 910 {
 911         int rc;
 912         ENTRY;
 913
 914         EXP_CHECK_DT_OP(exp, disconnect);
 915         EXP_COUNTER_INCREMENT(exp, disconnect);
 916
 917         rc = OBP(exp->exp_obd, disconnect)(exp);
 918         RETURN(rc);
 919 }
 920
 921 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
 922                                enum lu_cli_type type)
 923 {
 924         int rc;
 925         ENTRY;
 926
 927         OBD_CHECK_DT_OP(obd, fid_init, 0);
 928         OBD_COUNTER_INCREMENT(obd, fid_init);
 929
 930         rc = OBP(obd, fid_init)(obd, exp, type);
 931         RETURN(rc);
 932 }
 933
 934 static inline int obd_fid_fini(struct obd_device *obd)
 935 {
 936         int rc;
 937         ENTRY;
 938
 939         OBD_CHECK_DT_OP(obd, fid_fini, 0);
 940         OBD_COUNTER_INCREMENT(obd, fid_fini);
 941
 942         rc = OBP(obd, fid_fini)(obd);
 943         RETURN(rc);
 944 }
 945
 946 static inline int obd_fid_alloc(const struct lu_env *env,
 947                                 struct obd_export *exp,
 948                                 struct lu_fid *fid,
 949                                 struct md_op_data *op_data)
 950 {
 951         int rc;
 952         ENTRY;
 953
 954         EXP_CHECK_DT_OP(exp, fid_alloc);
 955         EXP_COUNTER_INCREMENT(exp, fid_alloc);
 956
 957         rc = OBP(exp->exp_obd, fid_alloc)(env, exp, fid, op_data);
 958         RETURN(rc);
 959 }
 960
 961 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
 962 {
 963         int rc;
 964         ENTRY;
 965
 966         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
 967         EXP_COUNTER_INCREMENT(exp, ping);
 968
 969         rc = OBP(exp->exp_obd, ping)(env, exp);
 970         RETURN(rc);
 971 }
 972
 973 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
 974 {
 975         int rc;
 976         ENTRY;
 977
 978         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
 979         OBD_COUNTER_INCREMENT(obd, pool_new);
 980
 981         rc = OBP(obd, pool_new)(obd, poolname);
 982         RETURN(rc);
 983 }
 984
 985 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
 986 {
 987         int rc;
 988         ENTRY;
 989
 990         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
 991         OBD_COUNTER_INCREMENT(obd, pool_del);
 992
 993         rc = OBP(obd, pool_del)(obd, poolname);
 994         RETURN(rc);
 995 }
 996
 997 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
 998 {
 999         int rc;
1000         ENTRY;
1001
1002         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
1003         OBD_COUNTER_INCREMENT(obd, pool_add);
1004
1005         rc = OBP(obd, pool_add)(obd, poolname, ostname);
1006         RETURN(rc);
1007 }
1008
1009 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
1010 {
1011         int rc;
1012         ENTRY;
1013
1014         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
1015         OBD_COUNTER_INCREMENT(obd, pool_rem);
1016
1017         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
1018         RETURN(rc);
1019 }
1020
1021 static inline void obd_getref(struct obd_device *obd)
1022 {
1023         ENTRY;
1024         if (OBT(obd) && OBP(obd, getref)) {
1025                 OBD_COUNTER_INCREMENT(obd, getref);
1026                 OBP(obd, getref)(obd);
1027         }
1028         EXIT;
1029 }
1030
1031 static inline void obd_putref(struct obd_device *obd)
1032 {
1033         ENTRY;
1034         if (OBT(obd) && OBP(obd, putref)) {
1035                 OBD_COUNTER_INCREMENT(obd, putref);
1036                 OBP(obd, putref)(obd);
1037         }
1038         EXIT;
1039 }
1040
1041 static inline int obd_init_export(struct obd_export *exp)
1042 {
1043         int rc = 0;
1044
1045         ENTRY;
1046         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1047             OBP((exp)->exp_obd, init_export))
1048                 rc = OBP(exp->exp_obd, init_export)(exp);
1049         RETURN(rc);
1050 }
1051
1052 static inline int obd_destroy_export(struct obd_export *exp)
1053 {
1054         ENTRY;
1055         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1056             OBP((exp)->exp_obd, destroy_export))
1057                 OBP(exp->exp_obd, destroy_export)(exp);
1058         RETURN(0);
1059 }
1060
1061 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1062  * If the cache is older than @max_age we will get a new value from the
1063  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1064 static inline int obd_statfs_async(struct obd_export *exp,
1065                                    struct obd_info *oinfo,
1066                                    __u64 max_age,
1067                                    struct ptlrpc_request_set *rqset)
1068 {
1069         int rc = 0;
1070         struct obd_device *obd;
1071         ENTRY;
1072
1073         if (exp == NULL || exp->exp_obd == NULL)
1074                 RETURN(-EINVAL);
1075
1076         obd = exp->exp_obd;
1077         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1078         OBD_COUNTER_INCREMENT(obd, statfs);
1079
1080         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
1081                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1082         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1083                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1084         } else {
1085                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
1086                        " objects "LPU64"/"LPU64"\n",
1087                        obd->obd_name, &obd->obd_osfs,
1088                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1089                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1090                 spin_lock(&obd->obd_osfs_lock);
1091                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1092                 spin_unlock(&obd->obd_osfs_lock);
1093                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1094                 if (oinfo->oi_cb_up)
1095                         oinfo->oi_cb_up(oinfo, 0);
1096         }
1097         RETURN(rc);
1098 }
1099
1100 static inline int obd_statfs_rqset(struct obd_export *exp,
1101                                    struct obd_statfs *osfs, __u64 max_age,
1102                                    __u32 flags)
1103 {
1104         struct ptlrpc_request_set *set = NULL;
1105         struct obd_info oinfo = { { { 0 } } };
1106         int rc = 0;
1107         ENTRY;
1108
1109         set =  ptlrpc_prep_set();
1110         if (set == NULL)
1111                 RETURN(-ENOMEM);
1112
1113         oinfo.oi_osfs = osfs;
1114         oinfo.oi_flags = flags;
1115         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1116         if (rc == 0)
1117                 rc = ptlrpc_set_wait(set);
1118         ptlrpc_set_destroy(set);
1119         RETURN(rc);
1120 }
1121
1122 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1123  * If the cache is older than @max_age we will get a new value from the
1124  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1125 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1126                              struct obd_statfs *osfs, __u64 max_age,
1127                              __u32 flags)
1128 {
1129         int rc = 0;
1130         struct obd_device *obd = exp->exp_obd;
1131         ENTRY;
1132
1133         if (obd == NULL)
1134                 RETURN(-EINVAL);
1135
1136         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1137         OBD_COUNTER_INCREMENT(obd, statfs);
1138
1139         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
1140                obd->obd_osfs_age, max_age);
1141         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1142                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1143                 if (rc == 0) {
1144                         spin_lock(&obd->obd_osfs_lock);
1145                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1146                         obd->obd_osfs_age = cfs_time_current_64();
1147                         spin_unlock(&obd->obd_osfs_lock);
1148                 }
1149         } else {
1150                 CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
1151                        " objects "LPU64"/"LPU64"\n",
1152                        obd->obd_name, &obd->obd_osfs,
1153                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1154                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1155                 spin_lock(&obd->obd_osfs_lock);
1156                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1157                 spin_unlock(&obd->obd_osfs_lock);
1158         }
1159         RETURN(rc);
1160 }
1161
1162 static inline int obd_preprw(const struct lu_env *env, int cmd,
1163                              struct obd_export *exp, struct obdo *oa,
1164                              int objcount, struct obd_ioobj *obj,
1165                              struct niobuf_remote *remote, int *pages,
1166                              struct niobuf_local *local,
1167                              struct obd_trans_info *oti)
1168 {
1169         int rc;
1170         ENTRY;
1171
1172         EXP_CHECK_DT_OP(exp, preprw);
1173         EXP_COUNTER_INCREMENT(exp, preprw);
1174
1175         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1176                                        pages, local, oti);
1177         RETURN(rc);
1178 }
1179
1180 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1181                                struct obd_export *exp, struct obdo *oa,
1182                                int objcount, struct obd_ioobj *obj,
1183                                struct niobuf_remote *rnb, int pages,
1184                                struct niobuf_local *local,
1185                                struct obd_trans_info *oti, int rc)
1186 {
1187         ENTRY;
1188
1189         EXP_CHECK_DT_OP(exp, commitrw);
1190         EXP_COUNTER_INCREMENT(exp, commitrw);
1191
1192         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1193                                          rnb, pages, local, oti, rc);
1194         RETURN(rc);
1195 }
1196
1197 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1198                                 int len, void *karg, void __user *uarg)
1199 {
1200         int rc;
1201         ENTRY;
1202
1203         EXP_CHECK_DT_OP(exp, iocontrol);
1204         EXP_COUNTER_INCREMENT(exp, iocontrol);
1205
1206         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1207         RETURN(rc);
1208 }
1209
1210 static inline void obd_import_event(struct obd_device *obd,
1211                                     struct obd_import *imp,
1212                                     enum obd_import_event event)
1213 {
1214         ENTRY;
1215         if (!obd) {
1216                 CERROR("NULL device\n");
1217                 EXIT;
1218                 return;
1219         }
1220         if (obd->obd_set_up && OBP(obd, import_event)) {
1221                 OBD_COUNTER_INCREMENT(obd, import_event);
1222                 OBP(obd, import_event)(obd, imp, event);
1223         }
1224         EXIT;
1225 }
1226
1227 static inline int obd_notify(struct obd_device *obd,
1228                              struct obd_device *watched,
1229                              enum obd_notify_event ev,
1230                              void *data)
1231 {
1232         int rc;
1233         ENTRY;
1234         OBD_CHECK_DEV(obd);
1235
1236         if (!obd->obd_set_up) {
1237                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1238                 RETURN(-EINVAL);
1239         }
1240
1241         if (!OBP(obd, notify)) {
1242                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1243                 RETURN(-ENOSYS);
1244         }
1245
1246         OBD_COUNTER_INCREMENT(obd, notify);
1247         rc = OBP(obd, notify)(obd, watched, ev, data);
1248         RETURN(rc);
1249 }
1250
1251 static inline int obd_notify_observer(struct obd_device *observer,
1252                                       struct obd_device *observed,
1253                                       enum obd_notify_event ev,
1254                                       void *data)
1255 {
1256         int rc1;
1257         int rc2;
1258
1259         struct obd_notify_upcall *onu;
1260
1261         if (observer->obd_observer)
1262                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1263         else
1264                 rc1 = 0;
1265         /*
1266          * Also, call non-obd listener, if any
1267          */
1268         onu = &observer->obd_upcall;
1269         if (onu->onu_upcall != NULL)
1270                 rc2 = onu->onu_upcall(observer, observed, ev,
1271                                       onu->onu_owner, NULL);
1272         else
1273                 rc2 = 0;
1274
1275         return rc1 ? rc1 : rc2;
1276 }
1277
1278 static inline int obd_quotacheck(struct obd_export *exp,
1279                                  struct obd_quotactl *oqctl)
1280 {
1281         int rc;
1282         ENTRY;
1283
1284         EXP_CHECK_DT_OP(exp, quotacheck);
1285         EXP_COUNTER_INCREMENT(exp, quotacheck);
1286
1287         rc = OBP(exp->exp_obd, quotacheck)(exp->exp_obd, exp, oqctl);
1288         RETURN(rc);
1289 }
1290
1291 static inline int obd_quotactl(struct obd_export *exp,
1292                                struct obd_quotactl *oqctl)
1293 {
1294         int rc;
1295         ENTRY;
1296
1297         EXP_CHECK_DT_OP(exp, quotactl);
1298         EXP_COUNTER_INCREMENT(exp, quotactl);
1299
1300         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1301         RETURN(rc);
1302 }
1303
1304 static inline int obd_health_check(const struct lu_env *env,
1305                                    struct obd_device *obd)
1306 {
1307         /* returns: 0 on healthy
1308          *         >0 on unhealthy + reason code/flag
1309          *            however the only suppored reason == 1 right now
1310          *            We'll need to define some better reasons
1311          *            or flags in the future.
1312          *         <0 on error
1313          */
1314         int rc;
1315         ENTRY;
1316
1317         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1318         if (obd == NULL || !OBT(obd)) {
1319                 CERROR("cleaned up obd\n");
1320                 RETURN(-EOPNOTSUPP);
1321         }
1322         if (!obd->obd_set_up || obd->obd_stopping)
1323                 RETURN(0);
1324         if (!OBP(obd, health_check))
1325                 RETURN(0);
1326
1327         rc = OBP(obd, health_check)(env, obd);
1328         RETURN(rc);
1329 }
1330
1331 static inline int obd_register_observer(struct obd_device *obd,
1332                                         struct obd_device *observer)
1333 {
1334         ENTRY;
1335         OBD_CHECK_DEV(obd);
1336         down_write(&obd->obd_observer_link_sem);
1337         if (obd->obd_observer && observer) {
1338                 up_write(&obd->obd_observer_link_sem);
1339                 RETURN(-EALREADY);
1340         }
1341         obd->obd_observer = observer;
1342         up_write(&obd->obd_observer_link_sem);
1343         RETURN(0);
1344 }
1345
1346 /* metadata helpers */
1347 static inline int md_getstatus(struct obd_export *exp,
1348                                struct lu_fid *fid, struct obd_capa **pc)
1349 {
1350         int rc;
1351         ENTRY;
1352
1353         EXP_CHECK_MD_OP(exp, getstatus);
1354         EXP_MD_COUNTER_INCREMENT(exp, getstatus);
1355         rc = MDP(exp->exp_obd, getstatus)(exp, fid, pc);
1356         RETURN(rc);
1357 }
1358
1359 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1360                              struct ptlrpc_request **request)
1361 {
1362         int rc;
1363         ENTRY;
1364         EXP_CHECK_MD_OP(exp, getattr);
1365         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1366         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1367         RETURN(rc);
1368 }
1369
1370 static inline int md_null_inode(struct obd_export *exp,
1371                                    const struct lu_fid *fid)
1372 {
1373         int rc;
1374         ENTRY;
1375         EXP_CHECK_MD_OP(exp, null_inode);
1376         EXP_MD_COUNTER_INCREMENT(exp, null_inode);
1377         rc = MDP(exp->exp_obd, null_inode)(exp, fid);
1378         RETURN(rc);
1379 }
1380
1381 static inline int md_find_cbdata(struct obd_export *exp,
1382                                  const struct lu_fid *fid,
1383                                  ldlm_iterator_t it, void *data)
1384 {
1385         int rc;
1386         ENTRY;
1387         EXP_CHECK_MD_OP(exp, find_cbdata);
1388         EXP_MD_COUNTER_INCREMENT(exp, find_cbdata);
1389         rc = MDP(exp->exp_obd, find_cbdata)(exp, fid, it, data);
1390         RETURN(rc);
1391 }
1392
1393 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1394                            struct md_open_data *mod,
1395                            struct ptlrpc_request **request)
1396 {
1397         int rc;
1398         ENTRY;
1399         EXP_CHECK_MD_OP(exp, close);
1400         EXP_MD_COUNTER_INCREMENT(exp, close);
1401         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1402         RETURN(rc);
1403 }
1404
1405 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1406                             const void *data, size_t datalen, umode_t mode,
1407                             uid_t uid, gid_t gid, cfs_cap_t cap_effective,
1408                             __u64 rdev, struct ptlrpc_request **request)
1409 {
1410         int rc;
1411         ENTRY;
1412         EXP_CHECK_MD_OP(exp, create);
1413         EXP_MD_COUNTER_INCREMENT(exp, create);
1414         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1415                                        uid, gid, cap_effective, rdev, request);
1416         RETURN(rc);
1417 }
1418
1419 static inline int md_enqueue(struct obd_export *exp,
1420                              struct ldlm_enqueue_info *einfo,
1421                              const union ldlm_policy_data *policy,
1422                              struct lookup_intent *it,
1423                              struct md_op_data *op_data,
1424                              struct lustre_handle *lockh,
1425                              __u64 extra_lock_flags)
1426 {
1427         int rc;
1428         ENTRY;
1429         EXP_CHECK_MD_OP(exp, enqueue);
1430         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1431         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, policy, it, op_data, lockh,
1432                                         extra_lock_flags);
1433         RETURN(rc);
1434 }
1435
1436 static inline int md_getattr_name(struct obd_export *exp,
1437                                   struct md_op_data *op_data,
1438                                   struct ptlrpc_request **request)
1439 {
1440         int rc;
1441         ENTRY;
1442         EXP_CHECK_MD_OP(exp, getattr_name);
1443         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1444         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1445         RETURN(rc);
1446 }
1447
1448 static inline int md_intent_lock(struct obd_export *exp,
1449                                  struct md_op_data *op_data,
1450                                  struct lookup_intent *it,
1451                                  struct ptlrpc_request **reqp,
1452                                  ldlm_blocking_callback cb_blocking,
1453                                  __u64 extra_lock_flags)
1454 {
1455         int rc;
1456         ENTRY;
1457         EXP_CHECK_MD_OP(exp, intent_lock);
1458         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1459         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, it, reqp, cb_blocking,
1460                                             extra_lock_flags);
1461         RETURN(rc);
1462 }
1463
1464 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1465                           struct ptlrpc_request **request)
1466 {
1467         int rc;
1468         ENTRY;
1469         EXP_CHECK_MD_OP(exp, link);
1470         EXP_MD_COUNTER_INCREMENT(exp, link);
1471         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1472         RETURN(rc);
1473 }
1474
1475 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1476                             const char *old, size_t oldlen, const char *new,
1477                             size_t newlen, struct ptlrpc_request **request)
1478 {
1479         int rc;
1480         ENTRY;
1481         EXP_CHECK_MD_OP(exp, rename);
1482         EXP_MD_COUNTER_INCREMENT(exp, rename);
1483         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1484                                        newlen, request);
1485         RETURN(rc);
1486 }
1487
1488 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
1489                              void *ea, size_t ealen,
1490                              struct ptlrpc_request **request)
1491 {
1492         int rc;
1493         ENTRY;
1494         EXP_CHECK_MD_OP(exp, setattr);
1495         EXP_MD_COUNTER_INCREMENT(exp, setattr);
1496         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen, request);
1497         RETURN(rc);
1498 }
1499
1500 static inline int md_fsync(struct obd_export *exp, const struct lu_fid *fid,
1501                            struct obd_capa *oc, struct ptlrpc_request **request)
1502 {
1503         int rc;
1504         ENTRY;
1505         EXP_CHECK_MD_OP(exp, fsync);
1506         EXP_MD_COUNTER_INCREMENT(exp, fsync);
1507         rc = MDP(exp->exp_obd, fsync)(exp, fid, oc, request);
1508         RETURN(rc);
1509 }
1510
1511 static inline int md_read_page(struct obd_export *exp,
1512                                struct md_op_data *op_data,
1513                                struct md_callback *cb_op,
1514                                __u64  hash_offset,
1515                                struct page **ppage)
1516 {
1517         int rc;
1518         ENTRY;
1519         EXP_CHECK_MD_OP(exp, read_page);
1520         EXP_MD_COUNTER_INCREMENT(exp, read_page);
1521         rc = MDP(exp->exp_obd, read_page)(exp, op_data, cb_op, hash_offset,
1522                                           ppage);
1523         RETURN(rc);
1524 }
1525
1526 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
1527                             struct ptlrpc_request **request)
1528 {
1529         int rc;
1530         ENTRY;
1531         EXP_CHECK_MD_OP(exp, unlink);
1532         EXP_MD_COUNTER_INCREMENT(exp, unlink);
1533         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
1534         RETURN(rc);
1535 }
1536
1537 static inline int md_get_lustre_md(struct obd_export *exp,
1538                                    struct ptlrpc_request *req,
1539                                    struct obd_export *dt_exp,
1540                                    struct obd_export *md_exp,
1541                                    struct lustre_md *md)
1542 {
1543         ENTRY;
1544         EXP_CHECK_MD_OP(exp, get_lustre_md);
1545         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
1546         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
1547 }
1548
1549 static inline int md_free_lustre_md(struct obd_export *exp,
1550                                     struct lustre_md *md)
1551 {
1552         ENTRY;
1553         EXP_CHECK_MD_OP(exp, free_lustre_md);
1554         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
1555         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
1556 }
1557
1558 static inline int md_merge_attr(struct obd_export *exp,
1559                                 const struct lmv_stripe_md *lsm,
1560                                 struct cl_attr *attr,
1561                                 ldlm_blocking_callback cb)
1562 {
1563         ENTRY;
1564         EXP_CHECK_MD_OP(exp, merge_attr);
1565         EXP_MD_COUNTER_INCREMENT(exp, merge_attr);
1566         RETURN(MDP(exp->exp_obd, merge_attr)(exp, lsm, attr, cb));
1567 }
1568
1569 static inline int md_setxattr(struct obd_export *exp,
1570                               const struct lu_fid *fid, struct obd_capa *oc,
1571                               u64 valid, const char *name,
1572                               const char *input, int input_size,
1573                               int output_size, int flags, __u32 suppgid,
1574                               struct ptlrpc_request **request)
1575 {
1576         ENTRY;
1577         EXP_CHECK_MD_OP(exp, setxattr);
1578         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
1579         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, oc, valid, name, input,
1580                                            input_size, output_size, flags,
1581                                            suppgid, request));
1582 }
1583
1584 static inline int md_getxattr(struct obd_export *exp,
1585                               const struct lu_fid *fid, struct obd_capa *oc,
1586                               u64 valid, const char *name,
1587                               const char *input, int input_size,
1588                               int output_size, int flags,
1589                               struct ptlrpc_request **request)
1590 {
1591         ENTRY;
1592         EXP_CHECK_MD_OP(exp, getxattr);
1593         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
1594         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, oc, valid, name, input,
1595                                            input_size, output_size, flags,
1596                                            request));
1597 }
1598
1599 static inline int md_set_open_replay_data(struct obd_export *exp,
1600                                           struct obd_client_handle *och,
1601                                           struct lookup_intent *it)
1602 {
1603         ENTRY;
1604         EXP_CHECK_MD_OP(exp, set_open_replay_data);
1605         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
1606         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, it));
1607 }
1608
1609 static inline int md_clear_open_replay_data(struct obd_export *exp,
1610                                             struct obd_client_handle *och)
1611 {
1612         ENTRY;
1613         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
1614         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
1615         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
1616 }
1617
1618 static inline int md_set_lock_data(struct obd_export *exp,
1619                                    __u64 *lockh, void *data, __u64 *bits)
1620 {
1621         ENTRY;
1622         EXP_CHECK_MD_OP(exp, set_lock_data);
1623         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
1624         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
1625 }
1626
1627 static inline int md_cancel_unused(struct obd_export *exp,
1628                                    const struct lu_fid *fid,
1629                                    ldlm_policy_data_t *policy,
1630                                    ldlm_mode_t mode,
1631                                    ldlm_cancel_flags_t flags,
1632                                    void *opaque)
1633 {
1634         int rc;
1635         ENTRY;
1636
1637         EXP_CHECK_MD_OP(exp, cancel_unused);
1638         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
1639
1640         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
1641                                               flags, opaque);
1642         RETURN(rc);
1643 }
1644
1645 static inline ldlm_mode_t md_lock_match(struct obd_export *exp, __u64 flags,
1646                                         const struct lu_fid *fid,
1647                                         ldlm_type_t type,
1648                                         ldlm_policy_data_t *policy,
1649                                         ldlm_mode_t mode,
1650                                         struct lustre_handle *lockh)
1651 {
1652         ENTRY;
1653         EXP_CHECK_MD_OP(exp, lock_match);
1654         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
1655         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
1656                                              policy, mode, lockh));
1657 }
1658
1659 static inline int md_init_ea_size(struct obd_export *exp, int easize,
1660                                   int def_asize, int cookiesize,
1661                                   int def_cookiesize)
1662 {
1663         ENTRY;
1664         EXP_CHECK_MD_OP(exp, init_ea_size);
1665         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
1666         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, easize, def_asize,
1667                                                cookiesize, def_cookiesize));
1668 }
1669
1670 static inline int md_get_remote_perm(struct obd_export *exp,
1671                                      const struct lu_fid *fid,
1672                                      struct obd_capa *oc, __u32 suppgid,
1673                                      struct ptlrpc_request **request)
1674 {
1675         ENTRY;
1676         EXP_CHECK_MD_OP(exp, get_remote_perm);
1677         EXP_MD_COUNTER_INCREMENT(exp, get_remote_perm);
1678         RETURN(MDP(exp->exp_obd, get_remote_perm)(exp, fid, oc, suppgid,
1679                                                   request));
1680 }
1681
1682 static inline int md_renew_capa(struct obd_export *exp, struct obd_capa *ocapa,
1683                                 renew_capa_cb_t cb)
1684 {
1685         int rc;
1686         ENTRY;
1687         EXP_CHECK_MD_OP(exp, renew_capa);
1688         EXP_MD_COUNTER_INCREMENT(exp, renew_capa);
1689         rc = MDP(exp->exp_obd, renew_capa)(exp, ocapa, cb);
1690         RETURN(rc);
1691 }
1692
1693 static inline int md_unpack_capa(struct obd_export *exp,
1694                                  struct ptlrpc_request *req,
1695                                  const struct req_msg_field *field,
1696                                  struct obd_capa **oc)
1697 {
1698         int rc;
1699         ENTRY;
1700         EXP_CHECK_MD_OP(exp, unpack_capa);
1701         EXP_MD_COUNTER_INCREMENT(exp, unpack_capa);
1702         rc = MDP(exp->exp_obd, unpack_capa)(exp, req, field, oc);
1703         RETURN(rc);
1704 }
1705
1706 static inline int md_intent_getattr_async(struct obd_export *exp,
1707                                           struct md_enqueue_info *minfo,
1708                                           struct ldlm_enqueue_info *einfo)
1709 {
1710         int rc;
1711         ENTRY;
1712         EXP_CHECK_MD_OP(exp, intent_getattr_async);
1713         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
1714         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo, einfo);
1715         RETURN(rc);
1716 }
1717
1718 static inline int md_revalidate_lock(struct obd_export *exp,
1719                                      struct lookup_intent *it,
1720                                      struct lu_fid *fid, __u64 *bits)
1721 {
1722         int rc;
1723         ENTRY;
1724         EXP_CHECK_MD_OP(exp, revalidate_lock);
1725         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
1726         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
1727         RETURN(rc);
1728 }
1729
1730 static inline int md_get_fid_from_lsm(struct obd_export *exp,
1731                                       const struct lmv_stripe_md *lsm,
1732                                       const char *name, int namelen,
1733                                       struct lu_fid *fid)
1734 {
1735         int rc;
1736         ENTRY;
1737         EXP_CHECK_MD_OP(exp, get_fid_from_lsm);
1738         EXP_MD_COUNTER_INCREMENT(exp, get_fid_from_lsm);
1739         rc = MDP(exp->exp_obd, get_fid_from_lsm)(exp, lsm, name, namelen, fid);
1740         RETURN(rc);
1741 }
1742
1743 /* OBD Metadata Support */
1744
1745 extern int obd_init_caches(void);
1746 extern void obd_cleanup_caches(void);
1747
1748 /* support routines */
1749 extern struct kmem_cache *obdo_cachep;
1750
1751 #define OBDO_ALLOC(ptr)                                                       \
1752 do {                                                                          \
1753         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, GFP_NOFS);             \
1754 } while(0)
1755
1756 #define OBDO_FREE(ptr)                                                        \
1757 do {                                                                          \
1758         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1759 } while(0)
1760
1761
1762 typedef int (*register_lwp_cb)(void *data);
1763
1764 struct lwp_register_item {
1765         struct obd_export **lri_exp;
1766         register_lwp_cb     lri_cb_func;
1767         void               *lri_cb_data;
1768         struct list_head            lri_list;
1769         char                lri_name[MTI_NAME_MAXLEN];
1770 };
1771
1772 /* I'm as embarrassed about this as you are.
1773  *
1774  * <shaver> // XXX do not look into _superhack with remaining eye
1775  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1776 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1777
1778 /* obd_mount.c */
1779 #ifdef HAVE_SERVER_SUPPORT
1780 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
1781                              register_lwp_cb cb_func, void *cb_data);
1782 void lustre_deregister_lwp_item(struct obd_export **exp);
1783 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx);
1784 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx);
1785 #endif /* HAVE_SERVER_SUPPORT */
1786 int lustre_register_fs(void);
1787 int lustre_unregister_fs(void);
1788 int lustre_check_exclusion(struct super_block *sb, char *svname);
1789
1790 /* sysctl.c */
1791 extern void obd_sysctl_init (void);
1792 extern void obd_sysctl_clean (void);
1793
1794 /* uuid.c  */
1795 typedef __u8 class_uuid_t[16];
1796 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
1797
1798 /* lustre_peer.c    */
1799 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
1800 int class_add_uuid(const char *uuid, __u64 nid);
1801 int class_del_uuid (const char *uuid);
1802 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
1803 void class_init_uuidlist(void);
1804 void class_exit_uuidlist(void);
1805
1806 /* prng.c */
1807 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
1808
1809 /* statfs_pack.c */
1810 struct kstatfs;
1811 void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
1812 void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);
1813
1814 /* root squash info */
1815 struct rw_semaphore;
1816 struct root_squash_info {
1817         uid_t                   rsi_uid;
1818         gid_t                   rsi_gid;
1819         struct list_head        rsi_nosquash_nids;
1820         struct rw_semaphore     rsi_sem;
1821 };
1822
1823 int server_name2index(const char *svname, __u32 *idx, const char **endptr);
1824
1825 /* linux-module.c */
1826 extern struct miscdevice obd_psdev;
1827 int class_procfs_init(void);
1828 int class_procfs_clean(void);
1829
1830 #endif /* __LINUX_OBD_CLASS_H */