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         if (exp->exp_obd->u.obt.obt_magic != OBT_MAGIC)
 309                 return NULL;
 310         return exp->exp_obd->u.obt.obt_lut;
 311 }
 312
 313 static inline struct lr_server_data *class_server_data(struct obd_device *obd)
 314 {
 315         LASSERT(obd->u.obt.obt_lut);
 316         return &obd->u.obt.obt_lut->lut_lsd;
 317 }
 318 #endif
 319
 320 /* obdo.c */
 321 struct lu_attr;
 322 struct inode;
 323
 324 void obdo_from_la(struct obdo *dst, const struct lu_attr *la, u64 valid);
 325 void la_from_obdo(struct lu_attr *la, const struct obdo *dst, u64 valid);
 326
 327 void obdo_cpy_md(struct obdo *dst, const struct obdo *src, u64 valid);
 328 void obdo_to_ioobj(const struct obdo *oa, struct obd_ioobj *ioobj);
 329
 330 #define OBT(dev)        (dev)->obd_type
 331 #define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 332 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
 333 #define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
 334
 335 /* Ensure obd_setup: used for cleanup which must be called
 336    while obd is stopping */
 337 #define OBD_CHECK_DEV(obd)                                      \
 338 do {                                                            \
 339         if (!(obd)) {                                           \
 340                 CERROR("NULL device\n");                        \
 341                 RETURN(-ENODEV);                                \
 342         }                                                       \
 343 } while (0)
 344
 345 /* ensure obd_setup and !obd_stopping */
 346 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 347 do {                                                            \
 348         OBD_CHECK_DEV(obd);                                     \
 349         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 350                 CERROR("Device %d not setup\n",                 \
 351                        (obd)->obd_minor);                       \
 352                 RETURN(-ENODEV);                                \
 353         }                                                       \
 354 } while (0)
 355
 356
 357 #ifdef CONFIG_PROC_FS
 358 #define OBD_COUNTER_OFFSET(op)                                                 \
 359         ((offsetof(struct obd_ops, o_ ## op) -                                 \
 360           offsetof(struct obd_ops, o_iocontrol))                               \
 361          / sizeof(((struct obd_ops *)NULL)->o_iocontrol))
 362
 363 /* The '- 1' below is for o_owner. */
 364 #define NUM_OBD_STATS                                                          \
 365         (sizeof(struct obd_ops) /                                              \
 366          sizeof(((struct obd_ops *)NULL)->o_iocontrol) - 1)
 367
 368 #define OBD_COUNTER_INCREMENT(obd, op)                                         \
 369         lprocfs_counter_incr((obd)->obd_stats,                                 \
 370                              (obd)->obd_cntr_base + OBD_COUNTER_OFFSET(op))
 371
 372 #define EXP_COUNTER_INCREMENT(exp, op)                                         \
 373         do {                                                                   \
 374                 unsigned int _off;                                             \
 375                 _off = (exp)->exp_obd->obd_cntr_base + OBD_COUNTER_OFFSET(op); \
 376                 lprocfs_counter_incr((exp)->exp_obd->obd_stats, _off);         \
 377                 if ((exp)->exp_obd->obd_uses_nid_stats &&                      \
 378                     (exp)->exp_nid_stats != NULL)                              \
 379                         lprocfs_counter_incr((exp)->exp_nid_stats->nid_stats,  \
 380                                              _off);                            \
 381         } while (0)
 382
 383 #define _MD_COUNTER_OFFSET(m_op)                                               \
 384         ((offsetof(struct md_ops, m_op) -                                      \
 385           offsetof(struct md_ops, MD_STATS_FIRST_OP)) /                        \
 386          sizeof(((struct md_ops *)NULL)->MD_STATS_FIRST_OP))
 387
 388 #define MD_COUNTER_OFFSET(op) _MD_COUNTER_OFFSET(m_ ## op)
 389
 390 #define NUM_MD_STATS                                                           \
 391         (_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) -                                \
 392          _MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) + 1)
 393
 394 /* Note that we only increment md counters for ops whose offset is less
 395  * than NUM_MD_STATS. This is explained in a comment in the definition
 396  * of struct md_ops. */
 397 #define EXP_MD_COUNTER_INCREMENT(exp, op)                                      \
 398         do {                                                                   \
 399                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS)                      \
 400                         lprocfs_counter_incr((exp)->exp_obd->obd_md_stats,     \
 401                                         (exp)->exp_obd->obd_md_cntr_base +     \
 402                                         MD_COUNTER_OFFSET(op));                \
 403         } while (0)
 404
 405 #else
 406 #define OBD_COUNTER_OFFSET(op)
 407 #define OBD_COUNTER_INCREMENT(obd, op)
 408 #define EXP_COUNTER_INCREMENT(exp, op)
 409 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 410 #endif
 411
 412 static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
 413 {
 414         /* Always add in ldlm_stats */
 415         tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC
 416                                                   ,LPROCFS_STATS_FLAG_NOPERCPU);
 417         if (tmp->nid_ldlm_stats == NULL)
 418                 return -ENOMEM;
 419
 420         lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
 421
 422         return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
 423                                       tmp->nid_ldlm_stats);
 424 }
 425
 426 #define EXP_CHECK_MD_OP(exp, op)                                \
 427 do {                                                            \
 428         if ((exp) == NULL) {                                    \
 429                 CERROR("obd_" #op ": NULL export\n");           \
 430                 RETURN(-ENODEV);                                \
 431         }                                                       \
 432         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 433                 CERROR("obd_" #op ": cleaned up obd\n");        \
 434                 RETURN(-EOPNOTSUPP);                            \
 435         }                                                       \
 436         if (!OBT((exp)->exp_obd) || !MDP((exp)->exp_obd, op)) { \
 437                 CERROR("obd_" #op ": dev %s/%d no operation\n", \
 438                        (exp)->exp_obd->obd_name,                \
 439                        (exp)->exp_obd->obd_minor);              \
 440                 RETURN(-EOPNOTSUPP);                            \
 441         }                                                       \
 442 } while (0)
 443
 444
 445 #define OBD_CHECK_DT_OP(obd, op, err)                           \
 446 do {                                                            \
 447         if (!OBT(obd) || !OBP((obd), op)) {                     \
 448                 if (err)                                        \
 449                         CERROR("obd_" #op ": dev %d no operation\n",    \
 450                                obd->obd_minor);                 \
 451                 RETURN(err);                                    \
 452         }                                                       \
 453 } while (0)
 454
 455 #define EXP_CHECK_DT_OP(exp, op)                                \
 456 do {                                                            \
 457         if ((exp) == NULL) {                                    \
 458                 CERROR("obd_" #op ": NULL export\n");           \
 459                 RETURN(-ENODEV);                                \
 460         }                                                       \
 461         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 462                 CERROR("obd_" #op ": cleaned up obd\n");        \
 463                 RETURN(-EOPNOTSUPP);                            \
 464         }                                                       \
 465         if (!OBT((exp)->exp_obd) || !OBP((exp)->exp_obd, op)) { \
 466                 CERROR("obd_" #op ": dev %d no operation\n",    \
 467                        (exp)->exp_obd->obd_minor);              \
 468                 RETURN(-EOPNOTSUPP);                            \
 469         }                                                       \
 470 } while (0)
 471
 472 #define CTXT_CHECK_OP(ctxt, op, err)                                 \
 473 do {                                                                 \
 474         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {             \
 475                 if (err)                                             \
 476                         CERROR("lop_" #op ": dev %d no operation\n", \
 477                                ctxt->loc_obd->obd_minor);            \
 478                 RETURN(err);                                         \
 479         }                                                            \
 480 } while (0)
 481
 482 static inline int class_devno_max(void)
 483 {
 484         return MAX_OBD_DEVICES;
 485 }
 486
 487 static inline int obd_get_info(const struct lu_env *env, struct obd_export *exp,
 488                                __u32 keylen, void *key,
 489                                __u32 *vallen, void *val)
 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         RETURN(rc);
 499 }
 500
 501 static inline int obd_set_info_async(const struct lu_env *env,
 502                                      struct obd_export *exp,
 503                                      __u32 keylen, void *key,
 504                                      __u32 vallen, void *val,
 505                                      struct ptlrpc_request_set *set)
 506 {
 507         int rc;
 508         ENTRY;
 509
 510         EXP_CHECK_DT_OP(exp, set_info_async);
 511         EXP_COUNTER_INCREMENT(exp, set_info_async);
 512
 513         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 514                                                val, set);
 515         RETURN(rc);
 516 }
 517
 518 /*
 519  * obd-lu integration.
 520  *
 521  * Functionality is being moved into new lu_device-based layering, but some
 522  * pieces of configuration process are still based on obd devices.
 523  *
 524  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 525  * subsume ->o_setup() methods of obd devices they replace. The same for
 526  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 527  * result, obd_setup() and obd_process_config() branch and call one XOR
 528  * another.
 529  *
 530  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 531  * lu_device_type_operations::ldto_device_free() fully implement the
 532  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 533  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 534  */
 535
 536 #define DECLARE_LU_VARS(ldt, d)                 \
 537         struct lu_device_type *ldt;       \
 538         struct lu_device *d
 539
 540 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 541 {
 542         int rc;
 543         DECLARE_LU_VARS(ldt, d);
 544         ENTRY;
 545
 546         ldt = obd->obd_type->typ_lu;
 547         if (ldt != NULL) {
 548                 struct lu_context  session_ctx;
 549                 struct lu_env env;
 550                 lu_context_init(&session_ctx, LCT_SESSION | LCT_SERVER_SESSION);
 551                 session_ctx.lc_thread = NULL;
 552                 lu_context_enter(&session_ctx);
 553
 554                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 555                 if (rc == 0) {
 556                         env.le_ses = &session_ctx;
 557                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 558                         lu_env_fini(&env);
 559                         if (!IS_ERR(d)) {
 560                                 obd->obd_lu_dev = d;
 561                                 d->ld_obd = obd;
 562                                 rc = 0;
 563                         } else
 564                                 rc = PTR_ERR(d);
 565                 }
 566                 lu_context_exit(&session_ctx);
 567                 lu_context_fini(&session_ctx);
 568
 569         } else {
 570                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
 571                 OBD_COUNTER_INCREMENT(obd, setup);
 572                 rc = OBP(obd, setup)(obd, cfg);
 573         }
 574         RETURN(rc);
 575 }
 576
 577 static inline int obd_precleanup(struct obd_device *obd,
 578                                  enum obd_cleanup_stage cleanup_stage)
 579 {
 580         int rc;
 581         DECLARE_LU_VARS(ldt, d);
 582         ENTRY;
 583
 584         OBD_CHECK_DEV(obd);
 585         ldt = obd->obd_type->typ_lu;
 586         d = obd->obd_lu_dev;
 587         if (ldt != NULL && d != NULL) {
 588                 if (cleanup_stage == OBD_CLEANUP_EXPORTS) {
 589                         struct lu_env env;
 590
 591                         rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 592                         if (rc == 0) {
 593                                 ldt->ldt_ops->ldto_device_fini(&env, d);
 594                                 lu_env_fini(&env);
 595                         }
 596                 }
 597         }
 598         OBD_CHECK_DT_OP(obd, precleanup, 0);
 599         OBD_COUNTER_INCREMENT(obd, precleanup);
 600
 601         rc = OBP(obd, precleanup)(obd, cleanup_stage);
 602         RETURN(rc);
 603 }
 604
 605 static inline int obd_cleanup(struct obd_device *obd)
 606 {
 607         int rc;
 608         DECLARE_LU_VARS(ldt, d);
 609         ENTRY;
 610
 611         OBD_CHECK_DEV(obd);
 612
 613         ldt = obd->obd_type->typ_lu;
 614         d = obd->obd_lu_dev;
 615         if (ldt != NULL && d != NULL) {
 616                 struct lu_env env;
 617
 618                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 619                 if (rc == 0) {
 620                         ldt->ldt_ops->ldto_device_free(&env, d);
 621                         lu_env_fini(&env);
 622                         obd->obd_lu_dev = NULL;
 623                 }
 624         }
 625         OBD_CHECK_DT_OP(obd, cleanup, 0);
 626         OBD_COUNTER_INCREMENT(obd, cleanup);
 627
 628         rc = OBP(obd, cleanup)(obd);
 629         RETURN(rc);
 630 }
 631
 632 static inline void obd_cleanup_client_import(struct obd_device *obd)
 633 {
 634         ENTRY;
 635
 636         /* If we set up but never connected, the
 637            client import will not have been cleaned. */
 638         down_write(&obd->u.cli.cl_sem);
 639         if (obd->u.cli.cl_import) {
 640                 struct obd_import *imp;
 641                 imp = obd->u.cli.cl_import;
 642                 CDEBUG(D_CONFIG, "%s: client import never connected\n",
 643                        obd->obd_name);
 644                 ptlrpc_invalidate_import(imp);
 645                 if (imp->imp_rq_pool) {
 646                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
 647                         imp->imp_rq_pool = NULL;
 648                 }
 649                 client_destroy_import(imp);
 650                 obd->u.cli.cl_import = NULL;
 651         }
 652         up_write(&obd->u.cli.cl_sem);
 653
 654         EXIT;
 655 }
 656
 657 static inline int
 658 obd_process_config(struct obd_device *obd, int datalen, void *data)
 659 {
 660         int rc;
 661         DECLARE_LU_VARS(ldt, d);
 662         ENTRY;
 663
 664         OBD_CHECK_DEV(obd);
 665
 666         obd->obd_process_conf = 1;
 667         ldt = obd->obd_type->typ_lu;
 668         d = obd->obd_lu_dev;
 669         if (ldt != NULL && d != NULL) {
 670                 struct lu_env env;
 671
 672                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 673                 if (rc == 0) {
 674                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 675                         lu_env_fini(&env);
 676                 }
 677         } else {
 678                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
 679                 rc = OBP(obd, process_config)(obd, datalen, data);
 680         }
 681         OBD_COUNTER_INCREMENT(obd, process_config);
 682         obd->obd_process_conf = 0;
 683
 684         RETURN(rc);
 685 }
 686
 687 /* Pack an in-memory MD struct for storage on disk.
 688  * Returns +ve size of packed MD (0 for free), or -ve error.
 689  *
 690  * If @disk_tgt == NULL, MD size is returned (max size if @mem_src == NULL).
 691  * If @*disk_tgt != NULL and @mem_src == NULL, @*disk_tgt will be freed.
 692  * If @*disk_tgt == NULL, it will be allocated
 693  */
 694 static inline int obd_packmd(struct obd_export *exp,
 695                              struct lov_mds_md **disk_tgt,
 696                              struct lov_stripe_md *mem_src)
 697 {
 698         int rc;
 699         ENTRY;
 700
 701         EXP_CHECK_DT_OP(exp, packmd);
 702         EXP_COUNTER_INCREMENT(exp, packmd);
 703
 704         rc = OBP(exp->exp_obd, packmd)(exp, disk_tgt, mem_src);
 705         RETURN(rc);
 706 }
 707
 708 static inline int obd_size_diskmd(struct obd_export *exp,
 709                                   struct lov_stripe_md *mem_src)
 710 {
 711         return obd_packmd(exp, NULL, mem_src);
 712 }
 713
 714 static inline int obd_free_diskmd(struct obd_export *exp,
 715                                   struct lov_mds_md **disk_tgt)
 716 {
 717         LASSERT(disk_tgt);
 718         LASSERT(*disk_tgt);
 719         /*
 720          * LU-2590, for caller's convenience, *disk_tgt could be host
 721          * endianness, it needs swab to LE if necessary, while just
 722          * lov_mds_md header needs it for figuring out how much memory
 723          * needs to be freed.
 724          */
 725         if ((cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) &&
 726             (((*disk_tgt)->lmm_magic == LOV_MAGIC_V1) ||
 727              ((*disk_tgt)->lmm_magic == LOV_MAGIC_V3)))
 728                 lustre_swab_lov_mds_md(*disk_tgt);
 729         return obd_packmd(exp, disk_tgt, NULL);
 730 }
 731
 732 /* Unpack an MD struct from disk to in-memory format.
 733  * Returns +ve size of unpacked MD (0 for free), or -ve error.
 734  *
 735  * If @mem_tgt == NULL, MD size is returned (max size if @disk_src == NULL).
 736  * If @*mem_tgt != NULL and @disk_src == NULL, @*mem_tgt will be freed.
 737  * If @*mem_tgt == NULL, it will be allocated
 738  */
 739 static inline int obd_unpackmd(struct obd_export *exp,
 740                                struct lov_stripe_md **mem_tgt,
 741                                struct lov_mds_md *disk_src,
 742                                int disk_len)
 743 {
 744         int rc;
 745         ENTRY;
 746
 747         EXP_CHECK_DT_OP(exp, unpackmd);
 748         EXP_COUNTER_INCREMENT(exp, unpackmd);
 749
 750         rc = OBP(exp->exp_obd, unpackmd)(exp, mem_tgt, disk_src, disk_len);
 751         RETURN(rc);
 752 }
 753
 754 static inline int obd_free_memmd(struct obd_export *exp,
 755                                  struct lov_stripe_md **mem_tgt)
 756 {
 757         int rc;
 758
 759         LASSERT(mem_tgt);
 760         LASSERT(*mem_tgt);
 761         rc = obd_unpackmd(exp, mem_tgt, NULL, 0);
 762         *mem_tgt = NULL;
 763         return rc;
 764 }
 765
 766 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 767                              struct obdo *obdo, struct obd_trans_info *oti)
 768 {
 769         int rc;
 770         ENTRY;
 771
 772         EXP_CHECK_DT_OP(exp, create);
 773         EXP_COUNTER_INCREMENT(exp, create);
 774
 775         rc = OBP(exp->exp_obd, create)(env, exp, obdo, oti);
 776         RETURN(rc);
 777 }
 778
 779 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 780                               struct obdo *obdo, struct obd_trans_info *oti)
 781 {
 782         int rc;
 783         ENTRY;
 784
 785         EXP_CHECK_DT_OP(exp, destroy);
 786         EXP_COUNTER_INCREMENT(exp, destroy);
 787
 788         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo, oti);
 789         RETURN(rc);
 790 }
 791
 792 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 793                               struct obd_info *oinfo)
 794 {
 795         int rc;
 796         ENTRY;
 797
 798         EXP_CHECK_DT_OP(exp, getattr);
 799         EXP_COUNTER_INCREMENT(exp, getattr);
 800
 801         rc = OBP(exp->exp_obd, getattr)(env, exp, oinfo);
 802         RETURN(rc);
 803 }
 804
 805 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 806                               struct obd_info *oinfo,
 807                               struct obd_trans_info *oti)
 808 {
 809         int rc;
 810         ENTRY;
 811
 812         EXP_CHECK_DT_OP(exp, setattr);
 813         EXP_COUNTER_INCREMENT(exp, setattr);
 814
 815         rc = OBP(exp->exp_obd, setattr)(env, exp, oinfo, oti);
 816         RETURN(rc);
 817 }
 818
 819 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 820                                int priority)
 821 {
 822         struct obd_device *obd = imp->imp_obd;
 823         int rc;
 824         ENTRY;
 825
 826         OBD_CHECK_DEV_ACTIVE(obd);
 827         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 828         OBD_COUNTER_INCREMENT(obd, add_conn);
 829
 830         rc = OBP(obd, add_conn)(imp, uuid, priority);
 831         RETURN(rc);
 832 }
 833
 834 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 835 {
 836         struct obd_device *obd = imp->imp_obd;
 837         int rc;
 838         ENTRY;
 839
 840         OBD_CHECK_DEV_ACTIVE(obd);
 841         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 842         OBD_COUNTER_INCREMENT(obd, del_conn);
 843
 844         rc = OBP(obd, del_conn)(imp, uuid);
 845         RETURN(rc);
 846 }
 847
 848 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 849 {
 850         struct obd_uuid *uuid;
 851         ENTRY;
 852
 853         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 854         EXP_COUNTER_INCREMENT(exp, get_uuid);
 855
 856         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 857         RETURN(uuid);
 858 }
 859
 860 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 861  * @param exp New export handle
 862  * @param d Connect data, supported flags are set, flags also understood
 863  *    by obd are returned.
 864  */
 865 static inline int obd_connect(const struct lu_env *env,
 866                               struct obd_export **exp,struct obd_device *obd,
 867                               struct obd_uuid *cluuid,
 868                               struct obd_connect_data *data,
 869                               void *localdata)
 870 {
 871         int rc;
 872         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 873                                                    * check */
 874         ENTRY;
 875
 876         OBD_CHECK_DEV_ACTIVE(obd);
 877         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
 878         OBD_COUNTER_INCREMENT(obd, connect);
 879
 880         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 881         /* check that only subset is granted */
 882         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
 883                                     data->ocd_connect_flags));
 884         RETURN(rc);
 885 }
 886
 887 static inline int obd_reconnect(const struct lu_env *env,
 888                                 struct obd_export *exp,
 889                                 struct obd_device *obd,
 890                                 struct obd_uuid *cluuid,
 891                                 struct obd_connect_data *d,
 892                                 void *localdata)
 893 {
 894         int rc;
 895         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
 896                                                    * check */
 897
 898         ENTRY;
 899
 900         OBD_CHECK_DEV_ACTIVE(obd);
 901         OBD_CHECK_DT_OP(obd, reconnect, 0);
 902         OBD_COUNTER_INCREMENT(obd, reconnect);
 903
 904         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 905         /* check that only subset is granted */
 906         LASSERT(ergo(d != NULL,
 907                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 908         RETURN(rc);
 909 }
 910
 911 static inline int obd_disconnect(struct obd_export *exp)
 912 {
 913         int rc;
 914         ENTRY;
 915
 916         EXP_CHECK_DT_OP(exp, disconnect);
 917         EXP_COUNTER_INCREMENT(exp, disconnect);
 918
 919         rc = OBP(exp->exp_obd, disconnect)(exp);
 920         RETURN(rc);
 921 }
 922
 923 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
 924                                enum lu_cli_type type)
 925 {
 926         int rc;
 927         ENTRY;
 928
 929         OBD_CHECK_DT_OP(obd, fid_init, 0);
 930         OBD_COUNTER_INCREMENT(obd, fid_init);
 931
 932         rc = OBP(obd, fid_init)(obd, exp, type);
 933         RETURN(rc);
 934 }
 935
 936 static inline int obd_fid_fini(struct obd_device *obd)
 937 {
 938         int rc;
 939         ENTRY;
 940
 941         OBD_CHECK_DT_OP(obd, fid_fini, 0);
 942         OBD_COUNTER_INCREMENT(obd, fid_fini);
 943
 944         rc = OBP(obd, fid_fini)(obd);
 945         RETURN(rc);
 946 }
 947
 948 static inline int obd_fid_alloc(const struct lu_env *env,
 949                                 struct obd_export *exp,
 950                                 struct lu_fid *fid,
 951                                 struct md_op_data *op_data)
 952 {
 953         int rc;
 954         ENTRY;
 955
 956         EXP_CHECK_DT_OP(exp, fid_alloc);
 957         EXP_COUNTER_INCREMENT(exp, fid_alloc);
 958
 959         rc = OBP(exp->exp_obd, fid_alloc)(env, exp, fid, op_data);
 960         RETURN(rc);
 961 }
 962
 963 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
 964 {
 965         int rc;
 966         ENTRY;
 967
 968         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
 969         EXP_COUNTER_INCREMENT(exp, ping);
 970
 971         rc = OBP(exp->exp_obd, ping)(env, exp);
 972         RETURN(rc);
 973 }
 974
 975 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
 976 {
 977         int rc;
 978         ENTRY;
 979
 980         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
 981         OBD_COUNTER_INCREMENT(obd, pool_new);
 982
 983         rc = OBP(obd, pool_new)(obd, poolname);
 984         RETURN(rc);
 985 }
 986
 987 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
 988 {
 989         int rc;
 990         ENTRY;
 991
 992         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
 993         OBD_COUNTER_INCREMENT(obd, pool_del);
 994
 995         rc = OBP(obd, pool_del)(obd, poolname);
 996         RETURN(rc);
 997 }
 998
 999 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
1000 {
1001         int rc;
1002         ENTRY;
1003
1004         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
1005         OBD_COUNTER_INCREMENT(obd, pool_add);
1006
1007         rc = OBP(obd, pool_add)(obd, poolname, ostname);
1008         RETURN(rc);
1009 }
1010
1011 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
1012 {
1013         int rc;
1014         ENTRY;
1015
1016         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
1017         OBD_COUNTER_INCREMENT(obd, pool_rem);
1018
1019         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
1020         RETURN(rc);
1021 }
1022
1023 static inline void obd_getref(struct obd_device *obd)
1024 {
1025         ENTRY;
1026         if (OBT(obd) && OBP(obd, getref)) {
1027                 OBD_COUNTER_INCREMENT(obd, getref);
1028                 OBP(obd, getref)(obd);
1029         }
1030         EXIT;
1031 }
1032
1033 static inline void obd_putref(struct obd_device *obd)
1034 {
1035         ENTRY;
1036         if (OBT(obd) && OBP(obd, putref)) {
1037                 OBD_COUNTER_INCREMENT(obd, putref);
1038                 OBP(obd, putref)(obd);
1039         }
1040         EXIT;
1041 }
1042
1043 static inline int obd_init_export(struct obd_export *exp)
1044 {
1045         int rc = 0;
1046
1047         ENTRY;
1048         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1049             OBP((exp)->exp_obd, init_export))
1050                 rc = OBP(exp->exp_obd, init_export)(exp);
1051         RETURN(rc);
1052 }
1053
1054 static inline int obd_destroy_export(struct obd_export *exp)
1055 {
1056         ENTRY;
1057         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1058             OBP((exp)->exp_obd, destroy_export))
1059                 OBP(exp->exp_obd, destroy_export)(exp);
1060         RETURN(0);
1061 }
1062
1063 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1064  * If the cache is older than @max_age we will get a new value from the
1065  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1066 static inline int obd_statfs_async(struct obd_export *exp,
1067                                    struct obd_info *oinfo,
1068                                    __u64 max_age,
1069                                    struct ptlrpc_request_set *rqset)
1070 {
1071         int rc = 0;
1072         struct obd_device *obd;
1073         ENTRY;
1074
1075         if (exp == NULL || exp->exp_obd == NULL)
1076                 RETURN(-EINVAL);
1077
1078         obd = exp->exp_obd;
1079         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1080         OBD_COUNTER_INCREMENT(obd, statfs);
1081
1082         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
1083                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1084         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1085                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1086         } else {
1087                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
1088                        " objects "LPU64"/"LPU64"\n",
1089                        obd->obd_name, &obd->obd_osfs,
1090                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1091                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1092                 spin_lock(&obd->obd_osfs_lock);
1093                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1094                 spin_unlock(&obd->obd_osfs_lock);
1095                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1096                 if (oinfo->oi_cb_up)
1097                         oinfo->oi_cb_up(oinfo, 0);
1098         }
1099         RETURN(rc);
1100 }
1101
1102 static inline int obd_statfs_rqset(struct obd_export *exp,
1103                                    struct obd_statfs *osfs, __u64 max_age,
1104                                    __u32 flags)
1105 {
1106         struct ptlrpc_request_set *set = NULL;
1107         struct obd_info oinfo = { { { 0 } } };
1108         int rc = 0;
1109         ENTRY;
1110
1111         set =  ptlrpc_prep_set();
1112         if (set == NULL)
1113                 RETURN(-ENOMEM);
1114
1115         oinfo.oi_osfs = osfs;
1116         oinfo.oi_flags = flags;
1117         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1118         if (rc == 0)
1119                 rc = ptlrpc_set_wait(set);
1120         ptlrpc_set_destroy(set);
1121         RETURN(rc);
1122 }
1123
1124 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1125  * If the cache is older than @max_age we will get a new value from the
1126  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1127 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1128                              struct obd_statfs *osfs, __u64 max_age,
1129                              __u32 flags)
1130 {
1131         int rc = 0;
1132         struct obd_device *obd = exp->exp_obd;
1133         ENTRY;
1134
1135         if (obd == NULL)
1136                 RETURN(-EINVAL);
1137
1138         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1139         OBD_COUNTER_INCREMENT(obd, statfs);
1140
1141         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
1142                obd->obd_osfs_age, max_age);
1143         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1144                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1145                 if (rc == 0) {
1146                         spin_lock(&obd->obd_osfs_lock);
1147                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1148                         obd->obd_osfs_age = cfs_time_current_64();
1149                         spin_unlock(&obd->obd_osfs_lock);
1150                 }
1151         } else {
1152                 CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
1153                        " objects "LPU64"/"LPU64"\n",
1154                        obd->obd_name, &obd->obd_osfs,
1155                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1156                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1157                 spin_lock(&obd->obd_osfs_lock);
1158                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1159                 spin_unlock(&obd->obd_osfs_lock);
1160         }
1161         RETURN(rc);
1162 }
1163
1164 static inline int obd_preprw(const struct lu_env *env, int cmd,
1165                              struct obd_export *exp, struct obdo *oa,
1166                              int objcount, struct obd_ioobj *obj,
1167                              struct niobuf_remote *remote, int *pages,
1168                              struct niobuf_local *local,
1169                              struct obd_trans_info *oti)
1170 {
1171         int rc;
1172         ENTRY;
1173
1174         EXP_CHECK_DT_OP(exp, preprw);
1175         EXP_COUNTER_INCREMENT(exp, preprw);
1176
1177         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1178                                        pages, local, oti);
1179         RETURN(rc);
1180 }
1181
1182 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1183                                struct obd_export *exp, struct obdo *oa,
1184                                int objcount, struct obd_ioobj *obj,
1185                                struct niobuf_remote *rnb, int pages,
1186                                struct niobuf_local *local,
1187                                struct obd_trans_info *oti, int rc)
1188 {
1189         ENTRY;
1190
1191         EXP_CHECK_DT_OP(exp, commitrw);
1192         EXP_COUNTER_INCREMENT(exp, commitrw);
1193
1194         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1195                                          rnb, pages, local, oti, rc);
1196         RETURN(rc);
1197 }
1198
1199 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1200                                 int len, void *karg, void __user *uarg)
1201 {
1202         int rc;
1203         ENTRY;
1204
1205         EXP_CHECK_DT_OP(exp, iocontrol);
1206         EXP_COUNTER_INCREMENT(exp, iocontrol);
1207
1208         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1209         RETURN(rc);
1210 }
1211
1212 static inline void obd_import_event(struct obd_device *obd,
1213                                     struct obd_import *imp,
1214                                     enum obd_import_event event)
1215 {
1216         ENTRY;
1217         if (!obd) {
1218                 CERROR("NULL device\n");
1219                 EXIT;
1220                 return;
1221         }
1222         if (obd->obd_set_up && OBP(obd, import_event)) {
1223                 OBD_COUNTER_INCREMENT(obd, import_event);
1224                 OBP(obd, import_event)(obd, imp, event);
1225         }
1226         EXIT;
1227 }
1228
1229 static inline int obd_notify(struct obd_device *obd,
1230                              struct obd_device *watched,
1231                              enum obd_notify_event ev,
1232                              void *data)
1233 {
1234         int rc;
1235         ENTRY;
1236         OBD_CHECK_DEV(obd);
1237
1238         if (!obd->obd_set_up) {
1239                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1240                 RETURN(-EINVAL);
1241         }
1242
1243         if (!OBP(obd, notify)) {
1244                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1245                 RETURN(-ENOSYS);
1246         }
1247
1248         OBD_COUNTER_INCREMENT(obd, notify);
1249         rc = OBP(obd, notify)(obd, watched, ev, data);
1250         RETURN(rc);
1251 }
1252
1253 static inline int obd_notify_observer(struct obd_device *observer,
1254                                       struct obd_device *observed,
1255                                       enum obd_notify_event ev,
1256                                       void *data)
1257 {
1258         int rc1;
1259         int rc2;
1260
1261         struct obd_notify_upcall *onu;
1262
1263         if (observer->obd_observer)
1264                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1265         else
1266                 rc1 = 0;
1267         /*
1268          * Also, call non-obd listener, if any
1269          */
1270         onu = &observer->obd_upcall;
1271         if (onu->onu_upcall != NULL)
1272                 rc2 = onu->onu_upcall(observer, observed, ev,
1273                                       onu->onu_owner, NULL);
1274         else
1275                 rc2 = 0;
1276
1277         return rc1 ? rc1 : rc2;
1278 }
1279
1280 static inline int obd_quotactl(struct obd_export *exp,
1281                                struct obd_quotactl *oqctl)
1282 {
1283         int rc;
1284         ENTRY;
1285
1286         EXP_CHECK_DT_OP(exp, quotactl);
1287         EXP_COUNTER_INCREMENT(exp, quotactl);
1288
1289         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1290         RETURN(rc);
1291 }
1292
1293 static inline int obd_health_check(const struct lu_env *env,
1294                                    struct obd_device *obd)
1295 {
1296         /* returns: 0 on healthy
1297          *         >0 on unhealthy + reason code/flag
1298          *            however the only suppored reason == 1 right now
1299          *            We'll need to define some better reasons
1300          *            or flags in the future.
1301          *         <0 on error
1302          */
1303         int rc;
1304         ENTRY;
1305
1306         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1307         if (obd == NULL || !OBT(obd)) {
1308                 CERROR("cleaned up obd\n");
1309                 RETURN(-EOPNOTSUPP);
1310         }
1311         if (!obd->obd_set_up || obd->obd_stopping)
1312                 RETURN(0);
1313         if (!OBP(obd, health_check))
1314                 RETURN(0);
1315
1316         rc = OBP(obd, health_check)(env, obd);
1317         RETURN(rc);
1318 }
1319
1320 static inline int obd_register_observer(struct obd_device *obd,
1321                                         struct obd_device *observer)
1322 {
1323         ENTRY;
1324         OBD_CHECK_DEV(obd);
1325         down_write(&obd->obd_observer_link_sem);
1326         if (obd->obd_observer && observer) {
1327                 up_write(&obd->obd_observer_link_sem);
1328                 RETURN(-EALREADY);
1329         }
1330         obd->obd_observer = observer;
1331         up_write(&obd->obd_observer_link_sem);
1332         RETURN(0);
1333 }
1334
1335 /* metadata helpers */
1336 static inline int md_getstatus(struct obd_export *exp,
1337                                struct lu_fid *fid, struct obd_capa **pc)
1338 {
1339         int rc;
1340         ENTRY;
1341
1342         EXP_CHECK_MD_OP(exp, getstatus);
1343         EXP_MD_COUNTER_INCREMENT(exp, getstatus);
1344         rc = MDP(exp->exp_obd, getstatus)(exp, fid, pc);
1345         RETURN(rc);
1346 }
1347
1348 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1349                              struct ptlrpc_request **request)
1350 {
1351         int rc;
1352         ENTRY;
1353         EXP_CHECK_MD_OP(exp, getattr);
1354         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1355         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1356         RETURN(rc);
1357 }
1358
1359 static inline int md_null_inode(struct obd_export *exp,
1360                                    const struct lu_fid *fid)
1361 {
1362         int rc;
1363         ENTRY;
1364         EXP_CHECK_MD_OP(exp, null_inode);
1365         EXP_MD_COUNTER_INCREMENT(exp, null_inode);
1366         rc = MDP(exp->exp_obd, null_inode)(exp, fid);
1367         RETURN(rc);
1368 }
1369
1370 static inline int md_find_cbdata(struct obd_export *exp,
1371                                  const struct lu_fid *fid,
1372                                  ldlm_iterator_t it, void *data)
1373 {
1374         int rc;
1375         ENTRY;
1376         EXP_CHECK_MD_OP(exp, find_cbdata);
1377         EXP_MD_COUNTER_INCREMENT(exp, find_cbdata);
1378         rc = MDP(exp->exp_obd, find_cbdata)(exp, fid, it, data);
1379         RETURN(rc);
1380 }
1381
1382 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1383                            struct md_open_data *mod,
1384                            struct ptlrpc_request **request)
1385 {
1386         int rc;
1387         ENTRY;
1388         EXP_CHECK_MD_OP(exp, close);
1389         EXP_MD_COUNTER_INCREMENT(exp, close);
1390         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1391         RETURN(rc);
1392 }
1393
1394 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1395                             const void *data, size_t datalen, umode_t mode,
1396                             uid_t uid, gid_t gid, cfs_cap_t cap_effective,
1397                             __u64 rdev, struct ptlrpc_request **request)
1398 {
1399         int rc;
1400         ENTRY;
1401         EXP_CHECK_MD_OP(exp, create);
1402         EXP_MD_COUNTER_INCREMENT(exp, create);
1403         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1404                                        uid, gid, cap_effective, rdev, request);
1405         RETURN(rc);
1406 }
1407
1408 static inline int md_enqueue(struct obd_export *exp,
1409                              struct ldlm_enqueue_info *einfo,
1410                              const union ldlm_policy_data *policy,
1411                              struct lookup_intent *it,
1412                              struct md_op_data *op_data,
1413                              struct lustre_handle *lockh,
1414                              __u64 extra_lock_flags)
1415 {
1416         int rc;
1417         ENTRY;
1418         EXP_CHECK_MD_OP(exp, enqueue);
1419         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1420         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, policy, it, op_data, lockh,
1421                                         extra_lock_flags);
1422         RETURN(rc);
1423 }
1424
1425 static inline int md_getattr_name(struct obd_export *exp,
1426                                   struct md_op_data *op_data,
1427                                   struct ptlrpc_request **request)
1428 {
1429         int rc;
1430         ENTRY;
1431         EXP_CHECK_MD_OP(exp, getattr_name);
1432         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1433         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1434         RETURN(rc);
1435 }
1436
1437 static inline int md_intent_lock(struct obd_export *exp,
1438                                  struct md_op_data *op_data,
1439                                  struct lookup_intent *it,
1440                                  struct ptlrpc_request **reqp,
1441                                  ldlm_blocking_callback cb_blocking,
1442                                  __u64 extra_lock_flags)
1443 {
1444         int rc;
1445         ENTRY;
1446         EXP_CHECK_MD_OP(exp, intent_lock);
1447         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1448         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, it, reqp, cb_blocking,
1449                                             extra_lock_flags);
1450         RETURN(rc);
1451 }
1452
1453 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1454                           struct ptlrpc_request **request)
1455 {
1456         int rc;
1457         ENTRY;
1458         EXP_CHECK_MD_OP(exp, link);
1459         EXP_MD_COUNTER_INCREMENT(exp, link);
1460         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1461         RETURN(rc);
1462 }
1463
1464 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1465                             const char *old, size_t oldlen, const char *new,
1466                             size_t newlen, struct ptlrpc_request **request)
1467 {
1468         int rc;
1469         ENTRY;
1470         EXP_CHECK_MD_OP(exp, rename);
1471         EXP_MD_COUNTER_INCREMENT(exp, rename);
1472         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1473                                        newlen, request);
1474         RETURN(rc);
1475 }
1476
1477 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
1478                              void *ea, size_t ealen,
1479                              struct ptlrpc_request **request)
1480 {
1481         int rc;
1482         ENTRY;
1483         EXP_CHECK_MD_OP(exp, setattr);
1484         EXP_MD_COUNTER_INCREMENT(exp, setattr);
1485         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen, request);
1486         RETURN(rc);
1487 }
1488
1489 static inline int md_fsync(struct obd_export *exp, const struct lu_fid *fid,
1490                            struct obd_capa *oc, struct ptlrpc_request **request)
1491 {
1492         int rc;
1493         ENTRY;
1494         EXP_CHECK_MD_OP(exp, fsync);
1495         EXP_MD_COUNTER_INCREMENT(exp, fsync);
1496         rc = MDP(exp->exp_obd, fsync)(exp, fid, oc, request);
1497         RETURN(rc);
1498 }
1499
1500 static inline int md_read_page(struct obd_export *exp,
1501                                struct md_op_data *op_data,
1502                                struct md_callback *cb_op,
1503                                __u64  hash_offset,
1504                                struct page **ppage)
1505 {
1506         int rc;
1507         ENTRY;
1508         EXP_CHECK_MD_OP(exp, read_page);
1509         EXP_MD_COUNTER_INCREMENT(exp, read_page);
1510         rc = MDP(exp->exp_obd, read_page)(exp, op_data, cb_op, hash_offset,
1511                                           ppage);
1512         RETURN(rc);
1513 }
1514
1515 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
1516                             struct ptlrpc_request **request)
1517 {
1518         int rc;
1519         ENTRY;
1520         EXP_CHECK_MD_OP(exp, unlink);
1521         EXP_MD_COUNTER_INCREMENT(exp, unlink);
1522         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
1523         RETURN(rc);
1524 }
1525
1526 static inline int md_get_lustre_md(struct obd_export *exp,
1527                                    struct ptlrpc_request *req,
1528                                    struct obd_export *dt_exp,
1529                                    struct obd_export *md_exp,
1530                                    struct lustre_md *md)
1531 {
1532         ENTRY;
1533         EXP_CHECK_MD_OP(exp, get_lustre_md);
1534         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
1535         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
1536 }
1537
1538 static inline int md_free_lustre_md(struct obd_export *exp,
1539                                     struct lustre_md *md)
1540 {
1541         ENTRY;
1542         EXP_CHECK_MD_OP(exp, free_lustre_md);
1543         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
1544         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
1545 }
1546
1547 static inline int md_merge_attr(struct obd_export *exp,
1548                                 const struct lmv_stripe_md *lsm,
1549                                 struct cl_attr *attr,
1550                                 ldlm_blocking_callback cb)
1551 {
1552         ENTRY;
1553         EXP_CHECK_MD_OP(exp, merge_attr);
1554         EXP_MD_COUNTER_INCREMENT(exp, merge_attr);
1555         RETURN(MDP(exp->exp_obd, merge_attr)(exp, lsm, attr, cb));
1556 }
1557
1558 static inline int md_setxattr(struct obd_export *exp,
1559                               const struct lu_fid *fid, struct obd_capa *oc,
1560                               u64 valid, const char *name,
1561                               const char *input, int input_size,
1562                               int output_size, int flags, __u32 suppgid,
1563                               struct ptlrpc_request **request)
1564 {
1565         ENTRY;
1566         EXP_CHECK_MD_OP(exp, setxattr);
1567         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
1568         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, oc, valid, name, input,
1569                                            input_size, output_size, flags,
1570                                            suppgid, request));
1571 }
1572
1573 static inline int md_getxattr(struct obd_export *exp,
1574                               const struct lu_fid *fid, struct obd_capa *oc,
1575                               u64 valid, const char *name,
1576                               const char *input, int input_size,
1577                               int output_size, int flags,
1578                               struct ptlrpc_request **request)
1579 {
1580         ENTRY;
1581         EXP_CHECK_MD_OP(exp, getxattr);
1582         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
1583         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, oc, valid, name, input,
1584                                            input_size, output_size, flags,
1585                                            request));
1586 }
1587
1588 static inline int md_set_open_replay_data(struct obd_export *exp,
1589                                           struct obd_client_handle *och,
1590                                           struct lookup_intent *it)
1591 {
1592         ENTRY;
1593         EXP_CHECK_MD_OP(exp, set_open_replay_data);
1594         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
1595         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, it));
1596 }
1597
1598 static inline int md_clear_open_replay_data(struct obd_export *exp,
1599                                             struct obd_client_handle *och)
1600 {
1601         ENTRY;
1602         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
1603         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
1604         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
1605 }
1606
1607 static inline int md_set_lock_data(struct obd_export *exp,
1608                                    __u64 *lockh, void *data, __u64 *bits)
1609 {
1610         ENTRY;
1611         EXP_CHECK_MD_OP(exp, set_lock_data);
1612         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
1613         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
1614 }
1615
1616 static inline int md_cancel_unused(struct obd_export *exp,
1617                                    const struct lu_fid *fid,
1618                                    ldlm_policy_data_t *policy,
1619                                    ldlm_mode_t mode,
1620                                    ldlm_cancel_flags_t flags,
1621                                    void *opaque)
1622 {
1623         int rc;
1624         ENTRY;
1625
1626         EXP_CHECK_MD_OP(exp, cancel_unused);
1627         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
1628
1629         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
1630                                               flags, opaque);
1631         RETURN(rc);
1632 }
1633
1634 static inline ldlm_mode_t md_lock_match(struct obd_export *exp, __u64 flags,
1635                                         const struct lu_fid *fid,
1636                                         ldlm_type_t type,
1637                                         ldlm_policy_data_t *policy,
1638                                         ldlm_mode_t mode,
1639                                         struct lustre_handle *lockh)
1640 {
1641         ENTRY;
1642         EXP_CHECK_MD_OP(exp, lock_match);
1643         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
1644         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
1645                                              policy, mode, lockh));
1646 }
1647
1648 static inline int md_init_ea_size(struct obd_export *exp, int easize,
1649                                   int def_asize, int cookiesize,
1650                                   int def_cookiesize)
1651 {
1652         ENTRY;
1653         EXP_CHECK_MD_OP(exp, init_ea_size);
1654         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
1655         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, easize, def_asize,
1656                                                cookiesize, def_cookiesize));
1657 }
1658
1659 static inline int md_get_remote_perm(struct obd_export *exp,
1660                                      const struct lu_fid *fid,
1661                                      struct obd_capa *oc, __u32 suppgid,
1662                                      struct ptlrpc_request **request)
1663 {
1664         ENTRY;
1665         EXP_CHECK_MD_OP(exp, get_remote_perm);
1666         EXP_MD_COUNTER_INCREMENT(exp, get_remote_perm);
1667         RETURN(MDP(exp->exp_obd, get_remote_perm)(exp, fid, oc, suppgid,
1668                                                   request));
1669 }
1670
1671 static inline int md_renew_capa(struct obd_export *exp, struct obd_capa *ocapa,
1672                                 renew_capa_cb_t cb)
1673 {
1674         int rc;
1675         ENTRY;
1676         EXP_CHECK_MD_OP(exp, renew_capa);
1677         EXP_MD_COUNTER_INCREMENT(exp, renew_capa);
1678         rc = MDP(exp->exp_obd, renew_capa)(exp, ocapa, cb);
1679         RETURN(rc);
1680 }
1681
1682 static inline int md_unpack_capa(struct obd_export *exp,
1683                                  struct ptlrpc_request *req,
1684                                  const struct req_msg_field *field,
1685                                  struct obd_capa **oc)
1686 {
1687         int rc;
1688         ENTRY;
1689         EXP_CHECK_MD_OP(exp, unpack_capa);
1690         EXP_MD_COUNTER_INCREMENT(exp, unpack_capa);
1691         rc = MDP(exp->exp_obd, unpack_capa)(exp, req, field, oc);
1692         RETURN(rc);
1693 }
1694
1695 static inline int md_intent_getattr_async(struct obd_export *exp,
1696                                           struct md_enqueue_info *minfo,
1697                                           struct ldlm_enqueue_info *einfo)
1698 {
1699         int rc;
1700         ENTRY;
1701         EXP_CHECK_MD_OP(exp, intent_getattr_async);
1702         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
1703         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo, einfo);
1704         RETURN(rc);
1705 }
1706
1707 static inline int md_revalidate_lock(struct obd_export *exp,
1708                                      struct lookup_intent *it,
1709                                      struct lu_fid *fid, __u64 *bits)
1710 {
1711         int rc;
1712         ENTRY;
1713         EXP_CHECK_MD_OP(exp, revalidate_lock);
1714         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
1715         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
1716         RETURN(rc);
1717 }
1718
1719 static inline int md_get_fid_from_lsm(struct obd_export *exp,
1720                                       const struct lmv_stripe_md *lsm,
1721                                       const char *name, int namelen,
1722                                       struct lu_fid *fid)
1723 {
1724         int rc;
1725         ENTRY;
1726         EXP_CHECK_MD_OP(exp, get_fid_from_lsm);
1727         EXP_MD_COUNTER_INCREMENT(exp, get_fid_from_lsm);
1728         rc = MDP(exp->exp_obd, get_fid_from_lsm)(exp, lsm, name, namelen, fid);
1729         RETURN(rc);
1730 }
1731
1732 /* OBD Metadata Support */
1733
1734 extern int obd_init_caches(void);
1735 extern void obd_cleanup_caches(void);
1736
1737 /* support routines */
1738 extern struct kmem_cache *obdo_cachep;
1739
1740 #define OBDO_ALLOC(ptr)                                                       \
1741 do {                                                                          \
1742         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, GFP_NOFS);             \
1743 } while(0)
1744
1745 #define OBDO_FREE(ptr)                                                        \
1746 do {                                                                          \
1747         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1748 } while(0)
1749
1750
1751 typedef int (*register_lwp_cb)(void *data);
1752
1753 struct lwp_register_item {
1754         struct obd_export **lri_exp;
1755         register_lwp_cb     lri_cb_func;
1756         void               *lri_cb_data;
1757         struct list_head            lri_list;
1758         char                lri_name[MTI_NAME_MAXLEN];
1759 };
1760
1761 /* I'm as embarrassed about this as you are.
1762  *
1763  * <shaver> // XXX do not look into _superhack with remaining eye
1764  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1765 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1766
1767 /* obd_mount.c */
1768 #ifdef HAVE_SERVER_SUPPORT
1769 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
1770                              register_lwp_cb cb_func, void *cb_data);
1771 void lustre_deregister_lwp_item(struct obd_export **exp);
1772 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx);
1773 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx);
1774 #endif /* HAVE_SERVER_SUPPORT */
1775 int lustre_register_fs(void);
1776 int lustre_unregister_fs(void);
1777 int lustre_check_exclusion(struct super_block *sb, char *svname);
1778
1779 /* sysctl.c */
1780 extern void obd_sysctl_init (void);
1781 extern void obd_sysctl_clean (void);
1782
1783 /* uuid.c  */
1784 typedef __u8 class_uuid_t[16];
1785 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
1786
1787 /* lustre_peer.c    */
1788 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
1789 int class_add_uuid(const char *uuid, __u64 nid);
1790 int class_del_uuid (const char *uuid);
1791 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
1792 void class_init_uuidlist(void);
1793 void class_exit_uuidlist(void);
1794
1795 /* prng.c */
1796 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
1797
1798 /* statfs_pack.c */
1799 struct kstatfs;
1800 void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
1801 void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);
1802
1803 /* root squash info */
1804 struct rw_semaphore;
1805 struct root_squash_info {
1806         uid_t                   rsi_uid;
1807         gid_t                   rsi_gid;
1808         struct list_head        rsi_nosquash_nids;
1809         struct rw_semaphore     rsi_sem;
1810 };
1811
1812 int server_name2index(const char *svname, __u32 *idx, const char **endptr);
1813
1814 /* linux-module.c */
1815 extern struct miscdevice obd_psdev;
1816 int class_procfs_init(void);
1817 int class_procfs_clean(void);
1818
1819 #endif /* __LINUX_OBD_CLASS_H */