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, u32 valid);
 324
 325 void obdo_cpy_md(struct obdo *dst, const struct obdo *src, u32 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,
 486                                struct obd_export *exp,
 487                                __u32 keylen, void *key,
 488                                __u32 *vallen, void *val,
 489                                struct lov_stripe_md *lsm)
 490 {
 491         int rc;
 492         ENTRY;
 493
 494         EXP_CHECK_DT_OP(exp, get_info);
 495         EXP_COUNTER_INCREMENT(exp, get_info);
 496
 497         rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val,
 498                                          lsm);
 499         RETURN(rc);
 500 }
 501
 502 static inline int obd_set_info_async(const struct lu_env *env,
 503                                      struct obd_export *exp,
 504                                      __u32 keylen, void *key,
 505                                      __u32 vallen, void *val,
 506                                      struct ptlrpc_request_set *set)
 507 {
 508         int rc;
 509         ENTRY;
 510
 511         EXP_CHECK_DT_OP(exp, set_info_async);
 512         EXP_COUNTER_INCREMENT(exp, set_info_async);
 513
 514         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 515                                                val, set);
 516         RETURN(rc);
 517 }
 518
 519 /*
 520  * obd-lu integration.
 521  *
 522  * Functionality is being moved into new lu_device-based layering, but some
 523  * pieces of configuration process are still based on obd devices.
 524  *
 525  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 526  * subsume ->o_setup() methods of obd devices they replace. The same for
 527  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 528  * result, obd_setup() and obd_process_config() branch and call one XOR
 529  * another.
 530  *
 531  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 532  * lu_device_type_operations::ldto_device_free() fully implement the
 533  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 534  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 535  */
 536
 537 #define DECLARE_LU_VARS(ldt, d)                 \
 538         struct lu_device_type *ldt;       \
 539         struct lu_device *d
 540
 541 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 542 {
 543         int rc;
 544         DECLARE_LU_VARS(ldt, d);
 545         ENTRY;
 546
 547         ldt = obd->obd_type->typ_lu;
 548         if (ldt != NULL) {
 549                 struct lu_context  session_ctx;
 550                 struct lu_env env;
 551                 lu_context_init(&session_ctx, LCT_SESSION | LCT_SERVER_SESSION);
 552                 session_ctx.lc_thread = NULL;
 553                 lu_context_enter(&session_ctx);
 554
 555                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 556                 if (rc == 0) {
 557                         env.le_ses = &session_ctx;
 558                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 559                         lu_env_fini(&env);
 560                         if (!IS_ERR(d)) {
 561                                 obd->obd_lu_dev = d;
 562                                 d->ld_obd = obd;
 563                                 rc = 0;
 564                         } else
 565                                 rc = PTR_ERR(d);
 566                 }
 567                 lu_context_exit(&session_ctx);
 568                 lu_context_fini(&session_ctx);
 569
 570         } else {
 571                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
 572                 OBD_COUNTER_INCREMENT(obd, setup);
 573                 rc = OBP(obd, setup)(obd, cfg);
 574         }
 575         RETURN(rc);
 576 }
 577
 578 static inline int obd_precleanup(struct obd_device *obd,
 579                                  enum obd_cleanup_stage cleanup_stage)
 580 {
 581         int rc;
 582         DECLARE_LU_VARS(ldt, d);
 583         ENTRY;
 584
 585         OBD_CHECK_DEV(obd);
 586         ldt = obd->obd_type->typ_lu;
 587         d = obd->obd_lu_dev;
 588         if (ldt != NULL && d != NULL) {
 589                 if (cleanup_stage == OBD_CLEANUP_EXPORTS) {
 590                         struct lu_env env;
 591
 592                         rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 593                         if (rc == 0) {
 594                                 ldt->ldt_ops->ldto_device_fini(&env, d);
 595                                 lu_env_fini(&env);
 596                         }
 597                 }
 598         }
 599         OBD_CHECK_DT_OP(obd, precleanup, 0);
 600         OBD_COUNTER_INCREMENT(obd, precleanup);
 601
 602         rc = OBP(obd, precleanup)(obd, cleanup_stage);
 603         RETURN(rc);
 604 }
 605
 606 static inline int obd_cleanup(struct obd_device *obd)
 607 {
 608         int rc;
 609         DECLARE_LU_VARS(ldt, d);
 610         ENTRY;
 611
 612         OBD_CHECK_DEV(obd);
 613
 614         ldt = obd->obd_type->typ_lu;
 615         d = obd->obd_lu_dev;
 616         if (ldt != NULL && d != NULL) {
 617                 struct lu_env env;
 618
 619                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 620                 if (rc == 0) {
 621                         ldt->ldt_ops->ldto_device_free(&env, d);
 622                         lu_env_fini(&env);
 623                         obd->obd_lu_dev = NULL;
 624                 }
 625         }
 626         OBD_CHECK_DT_OP(obd, cleanup, 0);
 627         OBD_COUNTER_INCREMENT(obd, cleanup);
 628
 629         rc = OBP(obd, cleanup)(obd);
 630         RETURN(rc);
 631 }
 632
 633 static inline void obd_cleanup_client_import(struct obd_device *obd)
 634 {
 635         ENTRY;
 636
 637         /* If we set up but never connected, the
 638            client import will not have been cleaned. */
 639         down_write(&obd->u.cli.cl_sem);
 640         if (obd->u.cli.cl_import) {
 641                 struct obd_import *imp;
 642                 imp = obd->u.cli.cl_import;
 643                 CDEBUG(D_CONFIG, "%s: client import never connected\n",
 644                        obd->obd_name);
 645                 ptlrpc_invalidate_import(imp);
 646                 if (imp->imp_rq_pool) {
 647                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
 648                         imp->imp_rq_pool = NULL;
 649                 }
 650                 client_destroy_import(imp);
 651                 obd->u.cli.cl_import = NULL;
 652         }
 653         up_write(&obd->u.cli.cl_sem);
 654
 655         EXIT;
 656 }
 657
 658 static inline int
 659 obd_process_config(struct obd_device *obd, int datalen, void *data)
 660 {
 661         int rc;
 662         DECLARE_LU_VARS(ldt, d);
 663         ENTRY;
 664
 665         OBD_CHECK_DEV(obd);
 666
 667         obd->obd_process_conf = 1;
 668         ldt = obd->obd_type->typ_lu;
 669         d = obd->obd_lu_dev;
 670         if (ldt != NULL && d != NULL) {
 671                 struct lu_env env;
 672
 673                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 674                 if (rc == 0) {
 675                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 676                         lu_env_fini(&env);
 677                 }
 678         } else {
 679                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
 680                 rc = OBP(obd, process_config)(obd, datalen, data);
 681         }
 682         OBD_COUNTER_INCREMENT(obd, process_config);
 683         obd->obd_process_conf = 0;
 684
 685         RETURN(rc);
 686 }
 687
 688 /* Pack an in-memory MD struct for storage on disk.
 689  * Returns +ve size of packed MD (0 for free), or -ve error.
 690  *
 691  * If @disk_tgt == NULL, MD size is returned (max size if @mem_src == NULL).
 692  * If @*disk_tgt != NULL and @mem_src == NULL, @*disk_tgt will be freed.
 693  * If @*disk_tgt == NULL, it will be allocated
 694  */
 695 static inline int obd_packmd(struct obd_export *exp,
 696                              struct lov_mds_md **disk_tgt,
 697                              struct lov_stripe_md *mem_src)
 698 {
 699         int rc;
 700         ENTRY;
 701
 702         EXP_CHECK_DT_OP(exp, packmd);
 703         EXP_COUNTER_INCREMENT(exp, packmd);
 704
 705         rc = OBP(exp->exp_obd, packmd)(exp, disk_tgt, mem_src);
 706         RETURN(rc);
 707 }
 708
 709 static inline int obd_size_diskmd(struct obd_export *exp,
 710                                   struct lov_stripe_md *mem_src)
 711 {
 712         return obd_packmd(exp, NULL, mem_src);
 713 }
 714
 715 static inline int obd_free_diskmd(struct obd_export *exp,
 716                                   struct lov_mds_md **disk_tgt)
 717 {
 718         LASSERT(disk_tgt);
 719         LASSERT(*disk_tgt);
 720         /*
 721          * LU-2590, for caller's convenience, *disk_tgt could be host
 722          * endianness, it needs swab to LE if necessary, while just
 723          * lov_mds_md header needs it for figuring out how much memory
 724          * needs to be freed.
 725          */
 726         if ((cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) &&
 727             (((*disk_tgt)->lmm_magic == LOV_MAGIC_V1) ||
 728              ((*disk_tgt)->lmm_magic == LOV_MAGIC_V3)))
 729                 lustre_swab_lov_mds_md(*disk_tgt);
 730         return obd_packmd(exp, disk_tgt, NULL);
 731 }
 732
 733 /* Unpack an MD struct from disk to in-memory format.
 734  * Returns +ve size of unpacked MD (0 for free), or -ve error.
 735  *
 736  * If @mem_tgt == NULL, MD size is returned (max size if @disk_src == NULL).
 737  * If @*mem_tgt != NULL and @disk_src == NULL, @*mem_tgt will be freed.
 738  * If @*mem_tgt == NULL, it will be allocated
 739  */
 740 static inline int obd_unpackmd(struct obd_export *exp,
 741                                struct lov_stripe_md **mem_tgt,
 742                                struct lov_mds_md *disk_src,
 743                                int disk_len)
 744 {
 745         int rc;
 746         ENTRY;
 747
 748         EXP_CHECK_DT_OP(exp, unpackmd);
 749         EXP_COUNTER_INCREMENT(exp, unpackmd);
 750
 751         rc = OBP(exp->exp_obd, unpackmd)(exp, mem_tgt, disk_src, disk_len);
 752         RETURN(rc);
 753 }
 754
 755 static inline int obd_free_memmd(struct obd_export *exp,
 756                                  struct lov_stripe_md **mem_tgt)
 757 {
 758         int rc;
 759
 760         LASSERT(mem_tgt);
 761         LASSERT(*mem_tgt);
 762         rc = obd_unpackmd(exp, mem_tgt, NULL, 0);
 763         *mem_tgt = NULL;
 764         return rc;
 765 }
 766
 767 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 768                              struct obdo *obdo, struct obd_trans_info *oti)
 769 {
 770         int rc;
 771         ENTRY;
 772
 773         EXP_CHECK_DT_OP(exp, create);
 774         EXP_COUNTER_INCREMENT(exp, create);
 775
 776         rc = OBP(exp->exp_obd, create)(env, exp, obdo, oti);
 777         RETURN(rc);
 778 }
 779
 780 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 781                               struct obdo *obdo, struct obd_trans_info *oti)
 782 {
 783         int rc;
 784         ENTRY;
 785
 786         EXP_CHECK_DT_OP(exp, destroy);
 787         EXP_COUNTER_INCREMENT(exp, destroy);
 788
 789         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo, oti);
 790         RETURN(rc);
 791 }
 792
 793 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 794                               struct obd_info *oinfo)
 795 {
 796         int rc;
 797         ENTRY;
 798
 799         EXP_CHECK_DT_OP(exp, getattr);
 800         EXP_COUNTER_INCREMENT(exp, getattr);
 801
 802         rc = OBP(exp->exp_obd, getattr)(env, exp, oinfo);
 803         RETURN(rc);
 804 }
 805
 806 static inline int obd_getattr_async(struct obd_export *exp,
 807                                     struct obd_info *oinfo,
 808                                     struct ptlrpc_request_set *set)
 809 {
 810         int rc;
 811         ENTRY;
 812
 813         EXP_CHECK_DT_OP(exp, getattr_async);
 814         EXP_COUNTER_INCREMENT(exp, getattr_async);
 815
 816         rc = OBP(exp->exp_obd, getattr_async)(exp, oinfo, set);
 817         RETURN(rc);
 818 }
 819
 820 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 821                               struct obd_info *oinfo,
 822                               struct obd_trans_info *oti)
 823 {
 824         int rc;
 825         ENTRY;
 826
 827         EXP_CHECK_DT_OP(exp, setattr);
 828         EXP_COUNTER_INCREMENT(exp, setattr);
 829
 830         rc = OBP(exp->exp_obd, setattr)(env, exp, oinfo, oti);
 831         RETURN(rc);
 832 }
 833
 834 /* This performs all the requests set init/wait/destroy actions. */
 835 static inline int obd_setattr_rqset(struct obd_export *exp,
 836                                     struct obd_info *oinfo,
 837                                     struct obd_trans_info *oti)
 838 {
 839         struct ptlrpc_request_set *set = NULL;
 840         int rc;
 841         ENTRY;
 842
 843         EXP_CHECK_DT_OP(exp, setattr_async);
 844         EXP_COUNTER_INCREMENT(exp, setattr_async);
 845
 846         set =  ptlrpc_prep_set();
 847         if (set == NULL)
 848                 RETURN(-ENOMEM);
 849
 850         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 851         if (rc == 0)
 852                 rc = ptlrpc_set_wait(set);
 853         ptlrpc_set_destroy(set);
 854         RETURN(rc);
 855 }
 856
 857 /* This adds all the requests into @set if @set != NULL, otherwise
 858    all requests are sent asynchronously without waiting for response. */
 859 static inline int obd_setattr_async(struct obd_export *exp,
 860                                     struct obd_info *oinfo,
 861                                     struct obd_trans_info *oti,
 862                                     struct ptlrpc_request_set *set)
 863 {
 864         int rc;
 865         ENTRY;
 866
 867         EXP_CHECK_DT_OP(exp, setattr_async);
 868         EXP_COUNTER_INCREMENT(exp, setattr_async);
 869
 870         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 871         RETURN(rc);
 872 }
 873
 874 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 875                                int priority)
 876 {
 877         struct obd_device *obd = imp->imp_obd;
 878         int rc;
 879         ENTRY;
 880
 881         OBD_CHECK_DEV_ACTIVE(obd);
 882         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 883         OBD_COUNTER_INCREMENT(obd, add_conn);
 884
 885         rc = OBP(obd, add_conn)(imp, uuid, priority);
 886         RETURN(rc);
 887 }
 888
 889 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 890 {
 891         struct obd_device *obd = imp->imp_obd;
 892         int rc;
 893         ENTRY;
 894
 895         OBD_CHECK_DEV_ACTIVE(obd);
 896         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 897         OBD_COUNTER_INCREMENT(obd, del_conn);
 898
 899         rc = OBP(obd, del_conn)(imp, uuid);
 900         RETURN(rc);
 901 }
 902
 903 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 904 {
 905         struct obd_uuid *uuid;
 906         ENTRY;
 907
 908         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 909         EXP_COUNTER_INCREMENT(exp, get_uuid);
 910
 911         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 912         RETURN(uuid);
 913 }
 914
 915 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 916  * @param exp New export handle
 917  * @param d Connect data, supported flags are set, flags also understood
 918  *    by obd are returned.
 919  */
 920 static inline int obd_connect(const struct lu_env *env,
 921                               struct obd_export **exp,struct obd_device *obd,
 922                               struct obd_uuid *cluuid,
 923                               struct obd_connect_data *data,
 924                               void *localdata)
 925 {
 926         int rc;
 927         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 928                                                    * check */
 929         ENTRY;
 930
 931         OBD_CHECK_DEV_ACTIVE(obd);
 932         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
 933         OBD_COUNTER_INCREMENT(obd, connect);
 934
 935         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 936         /* check that only subset is granted */
 937         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
 938                                     data->ocd_connect_flags));
 939         RETURN(rc);
 940 }
 941
 942 static inline int obd_reconnect(const struct lu_env *env,
 943                                 struct obd_export *exp,
 944                                 struct obd_device *obd,
 945                                 struct obd_uuid *cluuid,
 946                                 struct obd_connect_data *d,
 947                                 void *localdata)
 948 {
 949         int rc;
 950         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
 951                                                    * check */
 952
 953         ENTRY;
 954
 955         OBD_CHECK_DEV_ACTIVE(obd);
 956         OBD_CHECK_DT_OP(obd, reconnect, 0);
 957         OBD_COUNTER_INCREMENT(obd, reconnect);
 958
 959         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 960         /* check that only subset is granted */
 961         LASSERT(ergo(d != NULL,
 962                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 963         RETURN(rc);
 964 }
 965
 966 static inline int obd_disconnect(struct obd_export *exp)
 967 {
 968         int rc;
 969         ENTRY;
 970
 971         EXP_CHECK_DT_OP(exp, disconnect);
 972         EXP_COUNTER_INCREMENT(exp, disconnect);
 973
 974         rc = OBP(exp->exp_obd, disconnect)(exp);
 975         RETURN(rc);
 976 }
 977
 978 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
 979                                enum lu_cli_type type)
 980 {
 981         int rc;
 982         ENTRY;
 983
 984         OBD_CHECK_DT_OP(obd, fid_init, 0);
 985         OBD_COUNTER_INCREMENT(obd, fid_init);
 986
 987         rc = OBP(obd, fid_init)(obd, exp, type);
 988         RETURN(rc);
 989 }
 990
 991 static inline int obd_fid_fini(struct obd_device *obd)
 992 {
 993         int rc;
 994         ENTRY;
 995
 996         OBD_CHECK_DT_OP(obd, fid_fini, 0);
 997         OBD_COUNTER_INCREMENT(obd, fid_fini);
 998
 999         rc = OBP(obd, fid_fini)(obd);
1000         RETURN(rc);
1001 }
1002
1003 static inline int obd_fid_alloc(const struct lu_env *env,
1004                                 struct obd_export *exp,
1005                                 struct lu_fid *fid,
1006                                 struct md_op_data *op_data)
1007 {
1008         int rc;
1009         ENTRY;
1010
1011         EXP_CHECK_DT_OP(exp, fid_alloc);
1012         EXP_COUNTER_INCREMENT(exp, fid_alloc);
1013
1014         rc = OBP(exp->exp_obd, fid_alloc)(env, exp, fid, op_data);
1015         RETURN(rc);
1016 }
1017
1018 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
1019 {
1020         int rc;
1021         ENTRY;
1022
1023         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
1024         EXP_COUNTER_INCREMENT(exp, ping);
1025
1026         rc = OBP(exp->exp_obd, ping)(env, exp);
1027         RETURN(rc);
1028 }
1029
1030 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
1031 {
1032         int rc;
1033         ENTRY;
1034
1035         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
1036         OBD_COUNTER_INCREMENT(obd, pool_new);
1037
1038         rc = OBP(obd, pool_new)(obd, poolname);
1039         RETURN(rc);
1040 }
1041
1042 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
1043 {
1044         int rc;
1045         ENTRY;
1046
1047         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
1048         OBD_COUNTER_INCREMENT(obd, pool_del);
1049
1050         rc = OBP(obd, pool_del)(obd, poolname);
1051         RETURN(rc);
1052 }
1053
1054 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
1055 {
1056         int rc;
1057         ENTRY;
1058
1059         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
1060         OBD_COUNTER_INCREMENT(obd, pool_add);
1061
1062         rc = OBP(obd, pool_add)(obd, poolname, ostname);
1063         RETURN(rc);
1064 }
1065
1066 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
1067 {
1068         int rc;
1069         ENTRY;
1070
1071         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
1072         OBD_COUNTER_INCREMENT(obd, pool_rem);
1073
1074         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
1075         RETURN(rc);
1076 }
1077
1078 static inline void obd_getref(struct obd_device *obd)
1079 {
1080         ENTRY;
1081         if (OBT(obd) && OBP(obd, getref)) {
1082                 OBD_COUNTER_INCREMENT(obd, getref);
1083                 OBP(obd, getref)(obd);
1084         }
1085         EXIT;
1086 }
1087
1088 static inline void obd_putref(struct obd_device *obd)
1089 {
1090         ENTRY;
1091         if (OBT(obd) && OBP(obd, putref)) {
1092                 OBD_COUNTER_INCREMENT(obd, putref);
1093                 OBP(obd, putref)(obd);
1094         }
1095         EXIT;
1096 }
1097
1098 static inline int obd_init_export(struct obd_export *exp)
1099 {
1100         int rc = 0;
1101
1102         ENTRY;
1103         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1104             OBP((exp)->exp_obd, init_export))
1105                 rc = OBP(exp->exp_obd, init_export)(exp);
1106         RETURN(rc);
1107 }
1108
1109 static inline int obd_destroy_export(struct obd_export *exp)
1110 {
1111         ENTRY;
1112         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1113             OBP((exp)->exp_obd, destroy_export))
1114                 OBP(exp->exp_obd, destroy_export)(exp);
1115         RETURN(0);
1116 }
1117
1118 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1119  * If the cache is older than @max_age we will get a new value from the
1120  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1121 static inline int obd_statfs_async(struct obd_export *exp,
1122                                    struct obd_info *oinfo,
1123                                    __u64 max_age,
1124                                    struct ptlrpc_request_set *rqset)
1125 {
1126         int rc = 0;
1127         struct obd_device *obd;
1128         ENTRY;
1129
1130         if (exp == NULL || exp->exp_obd == NULL)
1131                 RETURN(-EINVAL);
1132
1133         obd = exp->exp_obd;
1134         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1135         OBD_COUNTER_INCREMENT(obd, statfs);
1136
1137         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
1138                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1139         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1140                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1141         } else {
1142                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
1143                        " objects "LPU64"/"LPU64"\n",
1144                        obd->obd_name, &obd->obd_osfs,
1145                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1146                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1147                 spin_lock(&obd->obd_osfs_lock);
1148                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1149                 spin_unlock(&obd->obd_osfs_lock);
1150                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1151                 if (oinfo->oi_cb_up)
1152                         oinfo->oi_cb_up(oinfo, 0);
1153         }
1154         RETURN(rc);
1155 }
1156
1157 static inline int obd_statfs_rqset(struct obd_export *exp,
1158                                    struct obd_statfs *osfs, __u64 max_age,
1159                                    __u32 flags)
1160 {
1161         struct ptlrpc_request_set *set = NULL;
1162         struct obd_info oinfo = { { { 0 } } };
1163         int rc = 0;
1164         ENTRY;
1165
1166         set =  ptlrpc_prep_set();
1167         if (set == NULL)
1168                 RETURN(-ENOMEM);
1169
1170         oinfo.oi_osfs = osfs;
1171         oinfo.oi_flags = flags;
1172         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1173         if (rc == 0)
1174                 rc = ptlrpc_set_wait(set);
1175         ptlrpc_set_destroy(set);
1176         RETURN(rc);
1177 }
1178
1179 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1180  * If the cache is older than @max_age we will get a new value from the
1181  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1182 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1183                              struct obd_statfs *osfs, __u64 max_age,
1184                              __u32 flags)
1185 {
1186         int rc = 0;
1187         struct obd_device *obd = exp->exp_obd;
1188         ENTRY;
1189
1190         if (obd == NULL)
1191                 RETURN(-EINVAL);
1192
1193         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1194         OBD_COUNTER_INCREMENT(obd, statfs);
1195
1196         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
1197                obd->obd_osfs_age, max_age);
1198         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1199                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1200                 if (rc == 0) {
1201                         spin_lock(&obd->obd_osfs_lock);
1202                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1203                         obd->obd_osfs_age = cfs_time_current_64();
1204                         spin_unlock(&obd->obd_osfs_lock);
1205                 }
1206         } else {
1207                 CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
1208                        " objects "LPU64"/"LPU64"\n",
1209                        obd->obd_name, &obd->obd_osfs,
1210                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1211                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1212                 spin_lock(&obd->obd_osfs_lock);
1213                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1214                 spin_unlock(&obd->obd_osfs_lock);
1215         }
1216         RETURN(rc);
1217 }
1218
1219 static inline int obd_preprw(const struct lu_env *env, int cmd,
1220                              struct obd_export *exp, struct obdo *oa,
1221                              int objcount, struct obd_ioobj *obj,
1222                              struct niobuf_remote *remote, int *pages,
1223                              struct niobuf_local *local,
1224                              struct obd_trans_info *oti,
1225                              struct lustre_capa *capa)
1226 {
1227         int rc;
1228         ENTRY;
1229
1230         EXP_CHECK_DT_OP(exp, preprw);
1231         EXP_COUNTER_INCREMENT(exp, preprw);
1232
1233         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1234                                        pages, local, oti, capa);
1235         RETURN(rc);
1236 }
1237
1238 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1239                                struct obd_export *exp, struct obdo *oa,
1240                                int objcount, struct obd_ioobj *obj,
1241                                struct niobuf_remote *rnb, int pages,
1242                                struct niobuf_local *local,
1243                                struct obd_trans_info *oti, int rc)
1244 {
1245         ENTRY;
1246
1247         EXP_CHECK_DT_OP(exp, commitrw);
1248         EXP_COUNTER_INCREMENT(exp, commitrw);
1249
1250         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1251                                          rnb, pages, local, oti, rc);
1252         RETURN(rc);
1253 }
1254
1255 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1256                                 int len, void *karg, void __user *uarg)
1257 {
1258         int rc;
1259         ENTRY;
1260
1261         EXP_CHECK_DT_OP(exp, iocontrol);
1262         EXP_COUNTER_INCREMENT(exp, iocontrol);
1263
1264         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1265         RETURN(rc);
1266 }
1267
1268 static inline void obd_import_event(struct obd_device *obd,
1269                                     struct obd_import *imp,
1270                                     enum obd_import_event event)
1271 {
1272         ENTRY;
1273         if (!obd) {
1274                 CERROR("NULL device\n");
1275                 EXIT;
1276                 return;
1277         }
1278         if (obd->obd_set_up && OBP(obd, import_event)) {
1279                 OBD_COUNTER_INCREMENT(obd, import_event);
1280                 OBP(obd, import_event)(obd, imp, event);
1281         }
1282         EXIT;
1283 }
1284
1285 static inline int obd_notify(struct obd_device *obd,
1286                              struct obd_device *watched,
1287                              enum obd_notify_event ev,
1288                              void *data)
1289 {
1290         int rc;
1291         ENTRY;
1292         OBD_CHECK_DEV(obd);
1293
1294         if (!obd->obd_set_up) {
1295                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1296                 RETURN(-EINVAL);
1297         }
1298
1299         if (!OBP(obd, notify)) {
1300                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1301                 RETURN(-ENOSYS);
1302         }
1303
1304         OBD_COUNTER_INCREMENT(obd, notify);
1305         rc = OBP(obd, notify)(obd, watched, ev, data);
1306         RETURN(rc);
1307 }
1308
1309 static inline int obd_notify_observer(struct obd_device *observer,
1310                                       struct obd_device *observed,
1311                                       enum obd_notify_event ev,
1312                                       void *data)
1313 {
1314         int rc1;
1315         int rc2;
1316
1317         struct obd_notify_upcall *onu;
1318
1319         if (observer->obd_observer)
1320                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1321         else
1322                 rc1 = 0;
1323         /*
1324          * Also, call non-obd listener, if any
1325          */
1326         onu = &observer->obd_upcall;
1327         if (onu->onu_upcall != NULL)
1328                 rc2 = onu->onu_upcall(observer, observed, ev,
1329                                       onu->onu_owner, NULL);
1330         else
1331                 rc2 = 0;
1332
1333         return rc1 ? rc1 : rc2;
1334 }
1335
1336 static inline int obd_quotacheck(struct obd_export *exp,
1337                                  struct obd_quotactl *oqctl)
1338 {
1339         int rc;
1340         ENTRY;
1341
1342         EXP_CHECK_DT_OP(exp, quotacheck);
1343         EXP_COUNTER_INCREMENT(exp, quotacheck);
1344
1345         rc = OBP(exp->exp_obd, quotacheck)(exp->exp_obd, exp, oqctl);
1346         RETURN(rc);
1347 }
1348
1349 static inline int obd_quotactl(struct obd_export *exp,
1350                                struct obd_quotactl *oqctl)
1351 {
1352         int rc;
1353         ENTRY;
1354
1355         EXP_CHECK_DT_OP(exp, quotactl);
1356         EXP_COUNTER_INCREMENT(exp, quotactl);
1357
1358         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1359         RETURN(rc);
1360 }
1361
1362 static inline int obd_health_check(const struct lu_env *env,
1363                                    struct obd_device *obd)
1364 {
1365         /* returns: 0 on healthy
1366          *         >0 on unhealthy + reason code/flag
1367          *            however the only suppored reason == 1 right now
1368          *            We'll need to define some better reasons
1369          *            or flags in the future.
1370          *         <0 on error
1371          */
1372         int rc;
1373         ENTRY;
1374
1375         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1376         if (obd == NULL || !OBT(obd)) {
1377                 CERROR("cleaned up obd\n");
1378                 RETURN(-EOPNOTSUPP);
1379         }
1380         if (!obd->obd_set_up || obd->obd_stopping)
1381                 RETURN(0);
1382         if (!OBP(obd, health_check))
1383                 RETURN(0);
1384
1385         rc = OBP(obd, health_check)(env, obd);
1386         RETURN(rc);
1387 }
1388
1389 static inline int obd_register_observer(struct obd_device *obd,
1390                                         struct obd_device *observer)
1391 {
1392         ENTRY;
1393         OBD_CHECK_DEV(obd);
1394         down_write(&obd->obd_observer_link_sem);
1395         if (obd->obd_observer && observer) {
1396                 up_write(&obd->obd_observer_link_sem);
1397                 RETURN(-EALREADY);
1398         }
1399         obd->obd_observer = observer;
1400         up_write(&obd->obd_observer_link_sem);
1401         RETURN(0);
1402 }
1403
1404 /* metadata helpers */
1405 static inline int md_getstatus(struct obd_export *exp,
1406                                struct lu_fid *fid, struct obd_capa **pc)
1407 {
1408         int rc;
1409         ENTRY;
1410
1411         EXP_CHECK_MD_OP(exp, getstatus);
1412         EXP_MD_COUNTER_INCREMENT(exp, getstatus);
1413         rc = MDP(exp->exp_obd, getstatus)(exp, fid, pc);
1414         RETURN(rc);
1415 }
1416
1417 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1418                              struct ptlrpc_request **request)
1419 {
1420         int rc;
1421         ENTRY;
1422         EXP_CHECK_MD_OP(exp, getattr);
1423         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1424         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1425         RETURN(rc);
1426 }
1427
1428 static inline int md_null_inode(struct obd_export *exp,
1429                                    const struct lu_fid *fid)
1430 {
1431         int rc;
1432         ENTRY;
1433         EXP_CHECK_MD_OP(exp, null_inode);
1434         EXP_MD_COUNTER_INCREMENT(exp, null_inode);
1435         rc = MDP(exp->exp_obd, null_inode)(exp, fid);
1436         RETURN(rc);
1437 }
1438
1439 static inline int md_find_cbdata(struct obd_export *exp,
1440                                  const struct lu_fid *fid,
1441                                  ldlm_iterator_t it, void *data)
1442 {
1443         int rc;
1444         ENTRY;
1445         EXP_CHECK_MD_OP(exp, find_cbdata);
1446         EXP_MD_COUNTER_INCREMENT(exp, find_cbdata);
1447         rc = MDP(exp->exp_obd, find_cbdata)(exp, fid, it, data);
1448         RETURN(rc);
1449 }
1450
1451 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1452                            struct md_open_data *mod,
1453                            struct ptlrpc_request **request)
1454 {
1455         int rc;
1456         ENTRY;
1457         EXP_CHECK_MD_OP(exp, close);
1458         EXP_MD_COUNTER_INCREMENT(exp, close);
1459         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1460         RETURN(rc);
1461 }
1462
1463 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1464                             const void *data, size_t datalen, umode_t mode,
1465                             uid_t uid, gid_t gid, cfs_cap_t cap_effective,
1466                             __u64 rdev, struct ptlrpc_request **request)
1467 {
1468         int rc;
1469         ENTRY;
1470         EXP_CHECK_MD_OP(exp, create);
1471         EXP_MD_COUNTER_INCREMENT(exp, create);
1472         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1473                                        uid, gid, cap_effective, rdev, request);
1474         RETURN(rc);
1475 }
1476
1477 static inline int md_enqueue(struct obd_export *exp,
1478                              struct ldlm_enqueue_info *einfo,
1479                              const union ldlm_policy_data *policy,
1480                              struct lookup_intent *it,
1481                              struct md_op_data *op_data,
1482                              struct lustre_handle *lockh,
1483                              __u64 extra_lock_flags)
1484 {
1485         int rc;
1486         ENTRY;
1487         EXP_CHECK_MD_OP(exp, enqueue);
1488         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1489         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, policy, it, op_data, lockh,
1490                                         extra_lock_flags);
1491         RETURN(rc);
1492 }
1493
1494 static inline int md_getattr_name(struct obd_export *exp,
1495                                   struct md_op_data *op_data,
1496                                   struct ptlrpc_request **request)
1497 {
1498         int rc;
1499         ENTRY;
1500         EXP_CHECK_MD_OP(exp, getattr_name);
1501         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1502         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1503         RETURN(rc);
1504 }
1505
1506 static inline int md_intent_lock(struct obd_export *exp,
1507                                  struct md_op_data *op_data,
1508                                  struct lookup_intent *it,
1509                                  struct ptlrpc_request **reqp,
1510                                  ldlm_blocking_callback cb_blocking,
1511                                  __u64 extra_lock_flags)
1512 {
1513         int rc;
1514         ENTRY;
1515         EXP_CHECK_MD_OP(exp, intent_lock);
1516         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1517         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, it, reqp, cb_blocking,
1518                                             extra_lock_flags);
1519         RETURN(rc);
1520 }
1521
1522 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1523                           struct ptlrpc_request **request)
1524 {
1525         int rc;
1526         ENTRY;
1527         EXP_CHECK_MD_OP(exp, link);
1528         EXP_MD_COUNTER_INCREMENT(exp, link);
1529         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1530         RETURN(rc);
1531 }
1532
1533 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1534                             const char *old, size_t oldlen, const char *new,
1535                             size_t newlen, struct ptlrpc_request **request)
1536 {
1537         int rc;
1538         ENTRY;
1539         EXP_CHECK_MD_OP(exp, rename);
1540         EXP_MD_COUNTER_INCREMENT(exp, rename);
1541         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1542                                        newlen, request);
1543         RETURN(rc);
1544 }
1545
1546 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
1547                              void *ea, size_t ealen,
1548                              struct ptlrpc_request **request)
1549 {
1550         int rc;
1551         ENTRY;
1552         EXP_CHECK_MD_OP(exp, setattr);
1553         EXP_MD_COUNTER_INCREMENT(exp, setattr);
1554         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen, request);
1555         RETURN(rc);
1556 }
1557
1558 static inline int md_fsync(struct obd_export *exp, const struct lu_fid *fid,
1559                            struct obd_capa *oc, struct ptlrpc_request **request)
1560 {
1561         int rc;
1562         ENTRY;
1563         EXP_CHECK_MD_OP(exp, fsync);
1564         EXP_MD_COUNTER_INCREMENT(exp, fsync);
1565         rc = MDP(exp->exp_obd, fsync)(exp, fid, oc, request);
1566         RETURN(rc);
1567 }
1568
1569 static inline int md_read_page(struct obd_export *exp,
1570                                struct md_op_data *op_data,
1571                                struct md_callback *cb_op,
1572                                __u64  hash_offset,
1573                                struct page **ppage)
1574 {
1575         int rc;
1576         ENTRY;
1577         EXP_CHECK_MD_OP(exp, read_page);
1578         EXP_MD_COUNTER_INCREMENT(exp, read_page);
1579         rc = MDP(exp->exp_obd, read_page)(exp, op_data, cb_op, hash_offset,
1580                                           ppage);
1581         RETURN(rc);
1582 }
1583
1584 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
1585                             struct ptlrpc_request **request)
1586 {
1587         int rc;
1588         ENTRY;
1589         EXP_CHECK_MD_OP(exp, unlink);
1590         EXP_MD_COUNTER_INCREMENT(exp, unlink);
1591         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
1592         RETURN(rc);
1593 }
1594
1595 static inline int md_get_lustre_md(struct obd_export *exp,
1596                                    struct ptlrpc_request *req,
1597                                    struct obd_export *dt_exp,
1598                                    struct obd_export *md_exp,
1599                                    struct lustre_md *md)
1600 {
1601         ENTRY;
1602         EXP_CHECK_MD_OP(exp, get_lustre_md);
1603         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
1604         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
1605 }
1606
1607 static inline int md_free_lustre_md(struct obd_export *exp,
1608                                     struct lustre_md *md)
1609 {
1610         ENTRY;
1611         EXP_CHECK_MD_OP(exp, free_lustre_md);
1612         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
1613         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
1614 }
1615
1616 static inline int md_merge_attr(struct obd_export *exp,
1617                                 const struct lmv_stripe_md *lsm,
1618                                 struct cl_attr *attr,
1619                                 ldlm_blocking_callback cb)
1620 {
1621         ENTRY;
1622         EXP_CHECK_MD_OP(exp, merge_attr);
1623         EXP_MD_COUNTER_INCREMENT(exp, merge_attr);
1624         RETURN(MDP(exp->exp_obd, merge_attr)(exp, lsm, attr, cb));
1625 }
1626
1627 static inline int md_setxattr(struct obd_export *exp,
1628                               const struct lu_fid *fid, struct obd_capa *oc,
1629                               u64 valid, const char *name,
1630                               const char *input, int input_size,
1631                               int output_size, int flags, __u32 suppgid,
1632                               struct ptlrpc_request **request)
1633 {
1634         ENTRY;
1635         EXP_CHECK_MD_OP(exp, setxattr);
1636         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
1637         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, oc, valid, name, input,
1638                                            input_size, output_size, flags,
1639                                            suppgid, request));
1640 }
1641
1642 static inline int md_getxattr(struct obd_export *exp,
1643                               const struct lu_fid *fid, struct obd_capa *oc,
1644                               u64 valid, const char *name,
1645                               const char *input, int input_size,
1646                               int output_size, int flags,
1647                               struct ptlrpc_request **request)
1648 {
1649         ENTRY;
1650         EXP_CHECK_MD_OP(exp, getxattr);
1651         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
1652         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, oc, valid, name, input,
1653                                            input_size, output_size, flags,
1654                                            request));
1655 }
1656
1657 static inline int md_set_open_replay_data(struct obd_export *exp,
1658                                           struct obd_client_handle *och,
1659                                           struct lookup_intent *it)
1660 {
1661         ENTRY;
1662         EXP_CHECK_MD_OP(exp, set_open_replay_data);
1663         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
1664         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, it));
1665 }
1666
1667 static inline int md_clear_open_replay_data(struct obd_export *exp,
1668                                             struct obd_client_handle *och)
1669 {
1670         ENTRY;
1671         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
1672         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
1673         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
1674 }
1675
1676 static inline int md_set_lock_data(struct obd_export *exp,
1677                                    __u64 *lockh, void *data, __u64 *bits)
1678 {
1679         ENTRY;
1680         EXP_CHECK_MD_OP(exp, set_lock_data);
1681         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
1682         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
1683 }
1684
1685 static inline int md_cancel_unused(struct obd_export *exp,
1686                                    const struct lu_fid *fid,
1687                                    ldlm_policy_data_t *policy,
1688                                    ldlm_mode_t mode,
1689                                    ldlm_cancel_flags_t flags,
1690                                    void *opaque)
1691 {
1692         int rc;
1693         ENTRY;
1694
1695         EXP_CHECK_MD_OP(exp, cancel_unused);
1696         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
1697
1698         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
1699                                               flags, opaque);
1700         RETURN(rc);
1701 }
1702
1703 static inline ldlm_mode_t md_lock_match(struct obd_export *exp, __u64 flags,
1704                                         const struct lu_fid *fid,
1705                                         ldlm_type_t type,
1706                                         ldlm_policy_data_t *policy,
1707                                         ldlm_mode_t mode,
1708                                         struct lustre_handle *lockh)
1709 {
1710         ENTRY;
1711         EXP_CHECK_MD_OP(exp, lock_match);
1712         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
1713         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
1714                                              policy, mode, lockh));
1715 }
1716
1717 static inline int md_init_ea_size(struct obd_export *exp, int easize,
1718                                   int def_asize, int cookiesize,
1719                                   int def_cookiesize)
1720 {
1721         ENTRY;
1722         EXP_CHECK_MD_OP(exp, init_ea_size);
1723         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
1724         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, easize, def_asize,
1725                                                cookiesize, def_cookiesize));
1726 }
1727
1728 static inline int md_get_remote_perm(struct obd_export *exp,
1729                                      const struct lu_fid *fid,
1730                                      struct obd_capa *oc, __u32 suppgid,
1731                                      struct ptlrpc_request **request)
1732 {
1733         ENTRY;
1734         EXP_CHECK_MD_OP(exp, get_remote_perm);
1735         EXP_MD_COUNTER_INCREMENT(exp, get_remote_perm);
1736         RETURN(MDP(exp->exp_obd, get_remote_perm)(exp, fid, oc, suppgid,
1737                                                   request));
1738 }
1739
1740 static inline int md_renew_capa(struct obd_export *exp, struct obd_capa *ocapa,
1741                                 renew_capa_cb_t cb)
1742 {
1743         int rc;
1744         ENTRY;
1745         EXP_CHECK_MD_OP(exp, renew_capa);
1746         EXP_MD_COUNTER_INCREMENT(exp, renew_capa);
1747         rc = MDP(exp->exp_obd, renew_capa)(exp, ocapa, cb);
1748         RETURN(rc);
1749 }
1750
1751 static inline int md_unpack_capa(struct obd_export *exp,
1752                                  struct ptlrpc_request *req,
1753                                  const struct req_msg_field *field,
1754                                  struct obd_capa **oc)
1755 {
1756         int rc;
1757         ENTRY;
1758         EXP_CHECK_MD_OP(exp, unpack_capa);
1759         EXP_MD_COUNTER_INCREMENT(exp, unpack_capa);
1760         rc = MDP(exp->exp_obd, unpack_capa)(exp, req, field, oc);
1761         RETURN(rc);
1762 }
1763
1764 static inline int md_intent_getattr_async(struct obd_export *exp,
1765                                           struct md_enqueue_info *minfo,
1766                                           struct ldlm_enqueue_info *einfo)
1767 {
1768         int rc;
1769         ENTRY;
1770         EXP_CHECK_MD_OP(exp, intent_getattr_async);
1771         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
1772         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo, einfo);
1773         RETURN(rc);
1774 }
1775
1776 static inline int md_revalidate_lock(struct obd_export *exp,
1777                                      struct lookup_intent *it,
1778                                      struct lu_fid *fid, __u64 *bits)
1779 {
1780         int rc;
1781         ENTRY;
1782         EXP_CHECK_MD_OP(exp, revalidate_lock);
1783         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
1784         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
1785         RETURN(rc);
1786 }
1787
1788 static inline int md_get_fid_from_lsm(struct obd_export *exp,
1789                                       const struct lmv_stripe_md *lsm,
1790                                       const char *name, int namelen,
1791                                       struct lu_fid *fid)
1792 {
1793         int rc;
1794         ENTRY;
1795         EXP_CHECK_MD_OP(exp, get_fid_from_lsm);
1796         EXP_MD_COUNTER_INCREMENT(exp, get_fid_from_lsm);
1797         rc = MDP(exp->exp_obd, get_fid_from_lsm)(exp, lsm, name, namelen, fid);
1798         RETURN(rc);
1799 }
1800
1801 /* OBD Metadata Support */
1802
1803 extern int obd_init_caches(void);
1804 extern void obd_cleanup_caches(void);
1805
1806 /* support routines */
1807 extern struct kmem_cache *obdo_cachep;
1808
1809 #define OBDO_ALLOC(ptr)                                                       \
1810 do {                                                                          \
1811         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, GFP_NOFS);             \
1812 } while(0)
1813
1814 #define OBDO_FREE(ptr)                                                        \
1815 do {                                                                          \
1816         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1817 } while(0)
1818
1819
1820 typedef int (*register_lwp_cb)(void *data);
1821
1822 struct lwp_register_item {
1823         struct obd_export **lri_exp;
1824         register_lwp_cb     lri_cb_func;
1825         void               *lri_cb_data;
1826         struct list_head            lri_list;
1827         char                lri_name[MTI_NAME_MAXLEN];
1828 };
1829
1830 /* I'm as embarrassed about this as you are.
1831  *
1832  * <shaver> // XXX do not look into _superhack with remaining eye
1833  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1834 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1835
1836 /* obd_mount.c */
1837 #ifdef HAVE_SERVER_SUPPORT
1838 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
1839                              register_lwp_cb cb_func, void *cb_data);
1840 void lustre_deregister_lwp_item(struct obd_export **exp);
1841 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx);
1842 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx);
1843 #endif /* HAVE_SERVER_SUPPORT */
1844 int lustre_register_fs(void);
1845 int lustre_unregister_fs(void);
1846 int lustre_check_exclusion(struct super_block *sb, char *svname);
1847
1848 /* sysctl.c */
1849 extern void obd_sysctl_init (void);
1850 extern void obd_sysctl_clean (void);
1851
1852 /* uuid.c  */
1853 typedef __u8 class_uuid_t[16];
1854 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
1855
1856 /* lustre_peer.c    */
1857 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
1858 int class_add_uuid(const char *uuid, __u64 nid);
1859 int class_del_uuid (const char *uuid);
1860 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
1861 void class_init_uuidlist(void);
1862 void class_exit_uuidlist(void);
1863
1864 /* prng.c */
1865 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
1866
1867 /* statfs_pack.c */
1868 struct kstatfs;
1869 void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
1870 void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);
1871
1872 /* root squash info */
1873 struct rw_semaphore;
1874 struct root_squash_info {
1875         uid_t                   rsi_uid;
1876         gid_t                   rsi_gid;
1877         struct list_head        rsi_nosquash_nids;
1878         struct rw_semaphore     rsi_sem;
1879 };
1880
1881 int server_name2index(const char *svname, __u32 *idx, const char **endptr);
1882
1883 /* linux-module.c */
1884 extern struct miscdevice obd_psdev;
1885 int class_procfs_init(void);
1886 int class_procfs_clean(void);
1887
1888 #endif /* __LINUX_OBD_CLASS_H */