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_free_diskmd(struct obd_export *exp,
 709                                   struct lov_mds_md **disk_tgt)
 710 {
 711         LASSERT(disk_tgt);
 712         LASSERT(*disk_tgt);
 713         /*
 714          * LU-2590, for caller's convenience, *disk_tgt could be host
 715          * endianness, it needs swab to LE if necessary, while just
 716          * lov_mds_md header needs it for figuring out how much memory
 717          * needs to be freed.
 718          */
 719         if ((cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) &&
 720             (((*disk_tgt)->lmm_magic == LOV_MAGIC_V1) ||
 721              ((*disk_tgt)->lmm_magic == LOV_MAGIC_V3)))
 722                 lustre_swab_lov_mds_md(*disk_tgt);
 723         return obd_packmd(exp, disk_tgt, NULL);
 724 }
 725
 726 /* Unpack an MD struct from disk to in-memory format.
 727  * Returns +ve size of unpacked MD (0 for free), or -ve error.
 728  *
 729  * If @mem_tgt == NULL, MD size is returned (max size if @disk_src == NULL).
 730  * If @*mem_tgt != NULL and @disk_src == NULL, @*mem_tgt will be freed.
 731  * If @*mem_tgt == NULL, it will be allocated
 732  */
 733 static inline int obd_unpackmd(struct obd_export *exp,
 734                                struct lov_stripe_md **mem_tgt,
 735                                struct lov_mds_md *disk_src,
 736                                int disk_len)
 737 {
 738         int rc;
 739         ENTRY;
 740
 741         EXP_CHECK_DT_OP(exp, unpackmd);
 742         EXP_COUNTER_INCREMENT(exp, unpackmd);
 743
 744         rc = OBP(exp->exp_obd, unpackmd)(exp, mem_tgt, disk_src, disk_len);
 745         RETURN(rc);
 746 }
 747
 748 static inline int obd_free_memmd(struct obd_export *exp,
 749                                  struct lov_stripe_md **mem_tgt)
 750 {
 751         int rc;
 752
 753         LASSERT(mem_tgt);
 754         LASSERT(*mem_tgt);
 755         rc = obd_unpackmd(exp, mem_tgt, NULL, 0);
 756         *mem_tgt = NULL;
 757         return rc;
 758 }
 759
 760 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 761                              struct obdo *obdo)
 762 {
 763         int rc;
 764         ENTRY;
 765
 766         EXP_CHECK_DT_OP(exp, create);
 767         EXP_COUNTER_INCREMENT(exp, create);
 768
 769         rc = OBP(exp->exp_obd, create)(env, exp, obdo);
 770         RETURN(rc);
 771 }
 772
 773 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 774                               struct obdo *obdo)
 775 {
 776         int rc;
 777         ENTRY;
 778
 779         EXP_CHECK_DT_OP(exp, destroy);
 780         EXP_COUNTER_INCREMENT(exp, destroy);
 781
 782         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo);
 783         RETURN(rc);
 784 }
 785
 786 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 787                               struct obd_info *oinfo)
 788 {
 789         int rc;
 790         ENTRY;
 791
 792         EXP_CHECK_DT_OP(exp, getattr);
 793         EXP_COUNTER_INCREMENT(exp, getattr);
 794
 795         rc = OBP(exp->exp_obd, getattr)(env, exp, oinfo);
 796         RETURN(rc);
 797 }
 798
 799 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 800                               struct obd_info *oinfo)
 801 {
 802         int rc;
 803
 804         ENTRY;
 805         EXP_CHECK_DT_OP(exp, setattr);
 806         EXP_COUNTER_INCREMENT(exp, setattr);
 807         rc = OBP(exp->exp_obd, setattr)(env, exp, oinfo);
 808
 809         RETURN(rc);
 810 }
 811
 812 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 813                                int priority)
 814 {
 815         struct obd_device *obd = imp->imp_obd;
 816         int rc;
 817         ENTRY;
 818
 819         OBD_CHECK_DEV_ACTIVE(obd);
 820         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 821         OBD_COUNTER_INCREMENT(obd, add_conn);
 822
 823         rc = OBP(obd, add_conn)(imp, uuid, priority);
 824         RETURN(rc);
 825 }
 826
 827 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 828 {
 829         struct obd_device *obd = imp->imp_obd;
 830         int rc;
 831         ENTRY;
 832
 833         OBD_CHECK_DEV_ACTIVE(obd);
 834         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 835         OBD_COUNTER_INCREMENT(obd, del_conn);
 836
 837         rc = OBP(obd, del_conn)(imp, uuid);
 838         RETURN(rc);
 839 }
 840
 841 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 842 {
 843         struct obd_uuid *uuid;
 844         ENTRY;
 845
 846         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 847         EXP_COUNTER_INCREMENT(exp, get_uuid);
 848
 849         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 850         RETURN(uuid);
 851 }
 852
 853 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 854  * @param exp New export handle
 855  * @param d Connect data, supported flags are set, flags also understood
 856  *    by obd are returned.
 857  */
 858 static inline int obd_connect(const struct lu_env *env,
 859                               struct obd_export **exp,struct obd_device *obd,
 860                               struct obd_uuid *cluuid,
 861                               struct obd_connect_data *data,
 862                               void *localdata)
 863 {
 864         int rc;
 865         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 866                                                    * check */
 867         ENTRY;
 868
 869         OBD_CHECK_DEV_ACTIVE(obd);
 870         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
 871         OBD_COUNTER_INCREMENT(obd, connect);
 872
 873         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 874         /* check that only subset is granted */
 875         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
 876                                     data->ocd_connect_flags));
 877         RETURN(rc);
 878 }
 879
 880 static inline int obd_reconnect(const struct lu_env *env,
 881                                 struct obd_export *exp,
 882                                 struct obd_device *obd,
 883                                 struct obd_uuid *cluuid,
 884                                 struct obd_connect_data *d,
 885                                 void *localdata)
 886 {
 887         int rc;
 888         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
 889                                                    * check */
 890
 891         ENTRY;
 892
 893         OBD_CHECK_DEV_ACTIVE(obd);
 894         OBD_CHECK_DT_OP(obd, reconnect, 0);
 895         OBD_COUNTER_INCREMENT(obd, reconnect);
 896
 897         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 898         /* check that only subset is granted */
 899         LASSERT(ergo(d != NULL,
 900                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 901         RETURN(rc);
 902 }
 903
 904 static inline int obd_disconnect(struct obd_export *exp)
 905 {
 906         int rc;
 907         ENTRY;
 908
 909         EXP_CHECK_DT_OP(exp, disconnect);
 910         EXP_COUNTER_INCREMENT(exp, disconnect);
 911
 912         rc = OBP(exp->exp_obd, disconnect)(exp);
 913         RETURN(rc);
 914 }
 915
 916 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
 917                                enum lu_cli_type type)
 918 {
 919         int rc;
 920         ENTRY;
 921
 922         OBD_CHECK_DT_OP(obd, fid_init, 0);
 923         OBD_COUNTER_INCREMENT(obd, fid_init);
 924
 925         rc = OBP(obd, fid_init)(obd, exp, type);
 926         RETURN(rc);
 927 }
 928
 929 static inline int obd_fid_fini(struct obd_device *obd)
 930 {
 931         int rc;
 932         ENTRY;
 933
 934         OBD_CHECK_DT_OP(obd, fid_fini, 0);
 935         OBD_COUNTER_INCREMENT(obd, fid_fini);
 936
 937         rc = OBP(obd, fid_fini)(obd);
 938         RETURN(rc);
 939 }
 940
 941 static inline int obd_fid_alloc(const struct lu_env *env,
 942                                 struct obd_export *exp,
 943                                 struct lu_fid *fid,
 944                                 struct md_op_data *op_data)
 945 {
 946         int rc;
 947         ENTRY;
 948
 949         EXP_CHECK_DT_OP(exp, fid_alloc);
 950         EXP_COUNTER_INCREMENT(exp, fid_alloc);
 951
 952         rc = OBP(exp->exp_obd, fid_alloc)(env, exp, fid, op_data);
 953         RETURN(rc);
 954 }
 955
 956 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
 957 {
 958         int rc;
 959         ENTRY;
 960
 961         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
 962         EXP_COUNTER_INCREMENT(exp, ping);
 963
 964         rc = OBP(exp->exp_obd, ping)(env, exp);
 965         RETURN(rc);
 966 }
 967
 968 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
 969 {
 970         int rc;
 971         ENTRY;
 972
 973         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
 974         OBD_COUNTER_INCREMENT(obd, pool_new);
 975
 976         rc = OBP(obd, pool_new)(obd, poolname);
 977         RETURN(rc);
 978 }
 979
 980 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
 981 {
 982         int rc;
 983         ENTRY;
 984
 985         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
 986         OBD_COUNTER_INCREMENT(obd, pool_del);
 987
 988         rc = OBP(obd, pool_del)(obd, poolname);
 989         RETURN(rc);
 990 }
 991
 992 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
 993 {
 994         int rc;
 995         ENTRY;
 996
 997         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
 998         OBD_COUNTER_INCREMENT(obd, pool_add);
 999
1000         rc = OBP(obd, pool_add)(obd, poolname, ostname);
1001         RETURN(rc);
1002 }
1003
1004 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
1005 {
1006         int rc;
1007         ENTRY;
1008
1009         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
1010         OBD_COUNTER_INCREMENT(obd, pool_rem);
1011
1012         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
1013         RETURN(rc);
1014 }
1015
1016 static inline void obd_getref(struct obd_device *obd)
1017 {
1018         ENTRY;
1019         if (OBT(obd) && OBP(obd, getref)) {
1020                 OBD_COUNTER_INCREMENT(obd, getref);
1021                 OBP(obd, getref)(obd);
1022         }
1023         EXIT;
1024 }
1025
1026 static inline void obd_putref(struct obd_device *obd)
1027 {
1028         ENTRY;
1029         if (OBT(obd) && OBP(obd, putref)) {
1030                 OBD_COUNTER_INCREMENT(obd, putref);
1031                 OBP(obd, putref)(obd);
1032         }
1033         EXIT;
1034 }
1035
1036 static inline int obd_init_export(struct obd_export *exp)
1037 {
1038         int rc = 0;
1039
1040         ENTRY;
1041         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1042             OBP((exp)->exp_obd, init_export))
1043                 rc = OBP(exp->exp_obd, init_export)(exp);
1044         RETURN(rc);
1045 }
1046
1047 static inline int obd_destroy_export(struct obd_export *exp)
1048 {
1049         ENTRY;
1050         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1051             OBP((exp)->exp_obd, destroy_export))
1052                 OBP(exp->exp_obd, destroy_export)(exp);
1053         RETURN(0);
1054 }
1055
1056 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1057  * If the cache is older than @max_age we will get a new value from the
1058  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1059 static inline int obd_statfs_async(struct obd_export *exp,
1060                                    struct obd_info *oinfo,
1061                                    __u64 max_age,
1062                                    struct ptlrpc_request_set *rqset)
1063 {
1064         int rc = 0;
1065         struct obd_device *obd;
1066         ENTRY;
1067
1068         if (exp == NULL || exp->exp_obd == NULL)
1069                 RETURN(-EINVAL);
1070
1071         obd = exp->exp_obd;
1072         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1073         OBD_COUNTER_INCREMENT(obd, statfs);
1074
1075         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
1076                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1077         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1078                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1079         } else {
1080                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
1081                        " objects "LPU64"/"LPU64"\n",
1082                        obd->obd_name, &obd->obd_osfs,
1083                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1084                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1085                 spin_lock(&obd->obd_osfs_lock);
1086                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1087                 spin_unlock(&obd->obd_osfs_lock);
1088                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1089                 if (oinfo->oi_cb_up)
1090                         oinfo->oi_cb_up(oinfo, 0);
1091         }
1092         RETURN(rc);
1093 }
1094
1095 static inline int obd_statfs_rqset(struct obd_export *exp,
1096                                    struct obd_statfs *osfs, __u64 max_age,
1097                                    __u32 flags)
1098 {
1099         struct ptlrpc_request_set *set = NULL;
1100         struct obd_info oinfo = { { { 0 } } };
1101         int rc = 0;
1102         ENTRY;
1103
1104         set =  ptlrpc_prep_set();
1105         if (set == NULL)
1106                 RETURN(-ENOMEM);
1107
1108         oinfo.oi_osfs = osfs;
1109         oinfo.oi_flags = flags;
1110         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1111         if (rc == 0)
1112                 rc = ptlrpc_set_wait(set);
1113         ptlrpc_set_destroy(set);
1114         RETURN(rc);
1115 }
1116
1117 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1118  * If the cache is older than @max_age we will get a new value from the
1119  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1120 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1121                              struct obd_statfs *osfs, __u64 max_age,
1122                              __u32 flags)
1123 {
1124         int rc = 0;
1125         struct obd_device *obd = exp->exp_obd;
1126         ENTRY;
1127
1128         if (obd == NULL)
1129                 RETURN(-EINVAL);
1130
1131         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1132         OBD_COUNTER_INCREMENT(obd, statfs);
1133
1134         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
1135                obd->obd_osfs_age, max_age);
1136         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1137                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1138                 if (rc == 0) {
1139                         spin_lock(&obd->obd_osfs_lock);
1140                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1141                         obd->obd_osfs_age = cfs_time_current_64();
1142                         spin_unlock(&obd->obd_osfs_lock);
1143                 }
1144         } else {
1145                 CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
1146                        " objects "LPU64"/"LPU64"\n",
1147                        obd->obd_name, &obd->obd_osfs,
1148                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1149                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1150                 spin_lock(&obd->obd_osfs_lock);
1151                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1152                 spin_unlock(&obd->obd_osfs_lock);
1153         }
1154         RETURN(rc);
1155 }
1156
1157 static inline int obd_preprw(const struct lu_env *env, int cmd,
1158                              struct obd_export *exp, struct obdo *oa,
1159                              int objcount, struct obd_ioobj *obj,
1160                              struct niobuf_remote *remote, int *pages,
1161                              struct niobuf_local *local)
1162 {
1163         int rc;
1164
1165         ENTRY;
1166         EXP_CHECK_DT_OP(exp, preprw);
1167         EXP_COUNTER_INCREMENT(exp, preprw);
1168         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1169                                        pages, local);
1170
1171         RETURN(rc);
1172 }
1173
1174 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1175                                struct obd_export *exp, struct obdo *oa,
1176                                int objcount, struct obd_ioobj *obj,
1177                                struct niobuf_remote *rnb, int pages,
1178                                struct niobuf_local *local, int rc)
1179 {
1180         ENTRY;
1181
1182         EXP_CHECK_DT_OP(exp, commitrw);
1183         EXP_COUNTER_INCREMENT(exp, commitrw);
1184         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1185                                          rnb, pages, local, rc);
1186
1187         RETURN(rc);
1188 }
1189
1190 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1191                                 int len, void *karg, void __user *uarg)
1192 {
1193         int rc;
1194         ENTRY;
1195
1196         EXP_CHECK_DT_OP(exp, iocontrol);
1197         EXP_COUNTER_INCREMENT(exp, iocontrol);
1198
1199         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1200         RETURN(rc);
1201 }
1202
1203 static inline void obd_import_event(struct obd_device *obd,
1204                                     struct obd_import *imp,
1205                                     enum obd_import_event event)
1206 {
1207         ENTRY;
1208         if (!obd) {
1209                 CERROR("NULL device\n");
1210                 EXIT;
1211                 return;
1212         }
1213         if (obd->obd_set_up && OBP(obd, import_event)) {
1214                 OBD_COUNTER_INCREMENT(obd, import_event);
1215                 OBP(obd, import_event)(obd, imp, event);
1216         }
1217         EXIT;
1218 }
1219
1220 static inline int obd_notify(struct obd_device *obd,
1221                              struct obd_device *watched,
1222                              enum obd_notify_event ev,
1223                              void *data)
1224 {
1225         int rc;
1226         ENTRY;
1227         OBD_CHECK_DEV(obd);
1228
1229         if (!obd->obd_set_up) {
1230                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1231                 RETURN(-EINVAL);
1232         }
1233
1234         if (!OBP(obd, notify)) {
1235                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1236                 RETURN(-ENOSYS);
1237         }
1238
1239         OBD_COUNTER_INCREMENT(obd, notify);
1240         rc = OBP(obd, notify)(obd, watched, ev, data);
1241         RETURN(rc);
1242 }
1243
1244 static inline int obd_notify_observer(struct obd_device *observer,
1245                                       struct obd_device *observed,
1246                                       enum obd_notify_event ev,
1247                                       void *data)
1248 {
1249         int rc1;
1250         int rc2;
1251
1252         struct obd_notify_upcall *onu;
1253
1254         if (observer->obd_observer)
1255                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1256         else
1257                 rc1 = 0;
1258         /*
1259          * Also, call non-obd listener, if any
1260          */
1261         onu = &observer->obd_upcall;
1262         if (onu->onu_upcall != NULL)
1263                 rc2 = onu->onu_upcall(observer, observed, ev,
1264                                       onu->onu_owner, NULL);
1265         else
1266                 rc2 = 0;
1267
1268         return rc1 ? rc1 : rc2;
1269 }
1270
1271 static inline int obd_quotactl(struct obd_export *exp,
1272                                struct obd_quotactl *oqctl)
1273 {
1274         int rc;
1275         ENTRY;
1276
1277         EXP_CHECK_DT_OP(exp, quotactl);
1278         EXP_COUNTER_INCREMENT(exp, quotactl);
1279
1280         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1281         RETURN(rc);
1282 }
1283
1284 static inline int obd_health_check(const struct lu_env *env,
1285                                    struct obd_device *obd)
1286 {
1287         /* returns: 0 on healthy
1288          *         >0 on unhealthy + reason code/flag
1289          *            however the only suppored reason == 1 right now
1290          *            We'll need to define some better reasons
1291          *            or flags in the future.
1292          *         <0 on error
1293          */
1294         int rc;
1295         ENTRY;
1296
1297         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1298         if (obd == NULL || !OBT(obd)) {
1299                 CERROR("cleaned up obd\n");
1300                 RETURN(-EOPNOTSUPP);
1301         }
1302         if (!obd->obd_set_up || obd->obd_stopping)
1303                 RETURN(0);
1304         if (!OBP(obd, health_check))
1305                 RETURN(0);
1306
1307         rc = OBP(obd, health_check)(env, obd);
1308         RETURN(rc);
1309 }
1310
1311 static inline int obd_register_observer(struct obd_device *obd,
1312                                         struct obd_device *observer)
1313 {
1314         ENTRY;
1315         OBD_CHECK_DEV(obd);
1316         down_write(&obd->obd_observer_link_sem);
1317         if (obd->obd_observer && observer) {
1318                 up_write(&obd->obd_observer_link_sem);
1319                 RETURN(-EALREADY);
1320         }
1321         obd->obd_observer = observer;
1322         up_write(&obd->obd_observer_link_sem);
1323         RETURN(0);
1324 }
1325
1326 /* metadata helpers */
1327 static inline int md_getstatus(struct obd_export *exp,
1328                                struct lu_fid *fid, struct obd_capa **pc)
1329 {
1330         int rc;
1331         ENTRY;
1332
1333         EXP_CHECK_MD_OP(exp, getstatus);
1334         EXP_MD_COUNTER_INCREMENT(exp, getstatus);
1335         rc = MDP(exp->exp_obd, getstatus)(exp, fid, pc);
1336         RETURN(rc);
1337 }
1338
1339 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1340                              struct ptlrpc_request **request)
1341 {
1342         int rc;
1343         ENTRY;
1344         EXP_CHECK_MD_OP(exp, getattr);
1345         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1346         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1347         RETURN(rc);
1348 }
1349
1350 static inline int md_null_inode(struct obd_export *exp,
1351                                    const struct lu_fid *fid)
1352 {
1353         int rc;
1354         ENTRY;
1355         EXP_CHECK_MD_OP(exp, null_inode);
1356         EXP_MD_COUNTER_INCREMENT(exp, null_inode);
1357         rc = MDP(exp->exp_obd, null_inode)(exp, fid);
1358         RETURN(rc);
1359 }
1360
1361 static inline int md_find_cbdata(struct obd_export *exp,
1362                                  const struct lu_fid *fid,
1363                                  ldlm_iterator_t it, void *data)
1364 {
1365         int rc;
1366         ENTRY;
1367         EXP_CHECK_MD_OP(exp, find_cbdata);
1368         EXP_MD_COUNTER_INCREMENT(exp, find_cbdata);
1369         rc = MDP(exp->exp_obd, find_cbdata)(exp, fid, it, data);
1370         RETURN(rc);
1371 }
1372
1373 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1374                            struct md_open_data *mod,
1375                            struct ptlrpc_request **request)
1376 {
1377         int rc;
1378         ENTRY;
1379         EXP_CHECK_MD_OP(exp, close);
1380         EXP_MD_COUNTER_INCREMENT(exp, close);
1381         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1382         RETURN(rc);
1383 }
1384
1385 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1386                             const void *data, size_t datalen, umode_t mode,
1387                             uid_t uid, gid_t gid, cfs_cap_t cap_effective,
1388                             __u64 rdev, struct ptlrpc_request **request)
1389 {
1390         int rc;
1391         ENTRY;
1392         EXP_CHECK_MD_OP(exp, create);
1393         EXP_MD_COUNTER_INCREMENT(exp, create);
1394         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1395                                        uid, gid, cap_effective, rdev, request);
1396         RETURN(rc);
1397 }
1398
1399 static inline int md_enqueue(struct obd_export *exp,
1400                              struct ldlm_enqueue_info *einfo,
1401                              const union ldlm_policy_data *policy,
1402                              struct lookup_intent *it,
1403                              struct md_op_data *op_data,
1404                              struct lustre_handle *lockh,
1405                              __u64 extra_lock_flags)
1406 {
1407         int rc;
1408         ENTRY;
1409         EXP_CHECK_MD_OP(exp, enqueue);
1410         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1411         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, policy, it, op_data, lockh,
1412                                         extra_lock_flags);
1413         RETURN(rc);
1414 }
1415
1416 static inline int md_getattr_name(struct obd_export *exp,
1417                                   struct md_op_data *op_data,
1418                                   struct ptlrpc_request **request)
1419 {
1420         int rc;
1421         ENTRY;
1422         EXP_CHECK_MD_OP(exp, getattr_name);
1423         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1424         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1425         RETURN(rc);
1426 }
1427
1428 static inline int md_intent_lock(struct obd_export *exp,
1429                                  struct md_op_data *op_data,
1430                                  struct lookup_intent *it,
1431                                  struct ptlrpc_request **reqp,
1432                                  ldlm_blocking_callback cb_blocking,
1433                                  __u64 extra_lock_flags)
1434 {
1435         int rc;
1436         ENTRY;
1437         EXP_CHECK_MD_OP(exp, intent_lock);
1438         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1439         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, it, reqp, cb_blocking,
1440                                             extra_lock_flags);
1441         RETURN(rc);
1442 }
1443
1444 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1445                           struct ptlrpc_request **request)
1446 {
1447         int rc;
1448         ENTRY;
1449         EXP_CHECK_MD_OP(exp, link);
1450         EXP_MD_COUNTER_INCREMENT(exp, link);
1451         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1452         RETURN(rc);
1453 }
1454
1455 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1456                             const char *old, size_t oldlen, const char *new,
1457                             size_t newlen, struct ptlrpc_request **request)
1458 {
1459         int rc;
1460         ENTRY;
1461         EXP_CHECK_MD_OP(exp, rename);
1462         EXP_MD_COUNTER_INCREMENT(exp, rename);
1463         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1464                                        newlen, request);
1465         RETURN(rc);
1466 }
1467
1468 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
1469                              void *ea, size_t ealen,
1470                              struct ptlrpc_request **request)
1471 {
1472         int rc;
1473         ENTRY;
1474         EXP_CHECK_MD_OP(exp, setattr);
1475         EXP_MD_COUNTER_INCREMENT(exp, setattr);
1476         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen, request);
1477         RETURN(rc);
1478 }
1479
1480 static inline int md_fsync(struct obd_export *exp, const struct lu_fid *fid,
1481                            struct obd_capa *oc, struct ptlrpc_request **request)
1482 {
1483         int rc;
1484         ENTRY;
1485         EXP_CHECK_MD_OP(exp, fsync);
1486         EXP_MD_COUNTER_INCREMENT(exp, fsync);
1487         rc = MDP(exp->exp_obd, fsync)(exp, fid, oc, request);
1488         RETURN(rc);
1489 }
1490
1491 static inline int md_read_page(struct obd_export *exp,
1492                                struct md_op_data *op_data,
1493                                struct md_callback *cb_op,
1494                                __u64  hash_offset,
1495                                struct page **ppage)
1496 {
1497         int rc;
1498         ENTRY;
1499         EXP_CHECK_MD_OP(exp, read_page);
1500         EXP_MD_COUNTER_INCREMENT(exp, read_page);
1501         rc = MDP(exp->exp_obd, read_page)(exp, op_data, cb_op, hash_offset,
1502                                           ppage);
1503         RETURN(rc);
1504 }
1505
1506 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
1507                             struct ptlrpc_request **request)
1508 {
1509         int rc;
1510         ENTRY;
1511         EXP_CHECK_MD_OP(exp, unlink);
1512         EXP_MD_COUNTER_INCREMENT(exp, unlink);
1513         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
1514         RETURN(rc);
1515 }
1516
1517 static inline int md_get_lustre_md(struct obd_export *exp,
1518                                    struct ptlrpc_request *req,
1519                                    struct obd_export *dt_exp,
1520                                    struct obd_export *md_exp,
1521                                    struct lustre_md *md)
1522 {
1523         ENTRY;
1524         EXP_CHECK_MD_OP(exp, get_lustre_md);
1525         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
1526         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
1527 }
1528
1529 static inline int md_free_lustre_md(struct obd_export *exp,
1530                                     struct lustre_md *md)
1531 {
1532         ENTRY;
1533         EXP_CHECK_MD_OP(exp, free_lustre_md);
1534         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
1535         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
1536 }
1537
1538 static inline int md_merge_attr(struct obd_export *exp,
1539                                 const struct lmv_stripe_md *lsm,
1540                                 struct cl_attr *attr,
1541                                 ldlm_blocking_callback cb)
1542 {
1543         ENTRY;
1544         EXP_CHECK_MD_OP(exp, merge_attr);
1545         EXP_MD_COUNTER_INCREMENT(exp, merge_attr);
1546         RETURN(MDP(exp->exp_obd, merge_attr)(exp, lsm, attr, cb));
1547 }
1548
1549 static inline int md_setxattr(struct obd_export *exp,
1550                               const struct lu_fid *fid, struct obd_capa *oc,
1551                               u64 valid, const char *name,
1552                               const char *input, int input_size,
1553                               int output_size, int flags, __u32 suppgid,
1554                               struct ptlrpc_request **request)
1555 {
1556         ENTRY;
1557         EXP_CHECK_MD_OP(exp, setxattr);
1558         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
1559         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, oc, valid, name, input,
1560                                            input_size, output_size, flags,
1561                                            suppgid, request));
1562 }
1563
1564 static inline int md_getxattr(struct obd_export *exp,
1565                               const struct lu_fid *fid, struct obd_capa *oc,
1566                               u64 valid, const char *name,
1567                               const char *input, int input_size,
1568                               int output_size, int flags,
1569                               struct ptlrpc_request **request)
1570 {
1571         ENTRY;
1572         EXP_CHECK_MD_OP(exp, getxattr);
1573         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
1574         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, oc, valid, name, input,
1575                                            input_size, output_size, flags,
1576                                            request));
1577 }
1578
1579 static inline int md_set_open_replay_data(struct obd_export *exp,
1580                                           struct obd_client_handle *och,
1581                                           struct lookup_intent *it)
1582 {
1583         ENTRY;
1584         EXP_CHECK_MD_OP(exp, set_open_replay_data);
1585         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
1586         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, it));
1587 }
1588
1589 static inline int md_clear_open_replay_data(struct obd_export *exp,
1590                                             struct obd_client_handle *och)
1591 {
1592         ENTRY;
1593         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
1594         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
1595         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
1596 }
1597
1598 static inline int md_set_lock_data(struct obd_export *exp,
1599                                    __u64 *lockh, void *data, __u64 *bits)
1600 {
1601         ENTRY;
1602         EXP_CHECK_MD_OP(exp, set_lock_data);
1603         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
1604         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
1605 }
1606
1607 static inline int md_cancel_unused(struct obd_export *exp,
1608                                    const struct lu_fid *fid,
1609                                    ldlm_policy_data_t *policy,
1610                                    ldlm_mode_t mode,
1611                                    ldlm_cancel_flags_t flags,
1612                                    void *opaque)
1613 {
1614         int rc;
1615         ENTRY;
1616
1617         EXP_CHECK_MD_OP(exp, cancel_unused);
1618         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
1619
1620         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
1621                                               flags, opaque);
1622         RETURN(rc);
1623 }
1624
1625 static inline ldlm_mode_t md_lock_match(struct obd_export *exp, __u64 flags,
1626                                         const struct lu_fid *fid,
1627                                         ldlm_type_t type,
1628                                         ldlm_policy_data_t *policy,
1629                                         ldlm_mode_t mode,
1630                                         struct lustre_handle *lockh)
1631 {
1632         ENTRY;
1633         EXP_CHECK_MD_OP(exp, lock_match);
1634         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
1635         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
1636                                              policy, mode, lockh));
1637 }
1638
1639 static inline int md_init_ea_size(struct obd_export *exp, __u32 ea_size,
1640                                   __u32 def_ea_size)
1641 {
1642         ENTRY;
1643         EXP_CHECK_MD_OP(exp, init_ea_size);
1644         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
1645         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, ea_size, def_ea_size));
1646 }
1647
1648 static inline int md_get_remote_perm(struct obd_export *exp,
1649                                      const struct lu_fid *fid,
1650                                      struct obd_capa *oc, __u32 suppgid,
1651                                      struct ptlrpc_request **request)
1652 {
1653         ENTRY;
1654         EXP_CHECK_MD_OP(exp, get_remote_perm);
1655         EXP_MD_COUNTER_INCREMENT(exp, get_remote_perm);
1656         RETURN(MDP(exp->exp_obd, get_remote_perm)(exp, fid, oc, suppgid,
1657                                                   request));
1658 }
1659
1660 static inline int md_renew_capa(struct obd_export *exp, struct obd_capa *ocapa,
1661                                 renew_capa_cb_t cb)
1662 {
1663         int rc;
1664         ENTRY;
1665         EXP_CHECK_MD_OP(exp, renew_capa);
1666         EXP_MD_COUNTER_INCREMENT(exp, renew_capa);
1667         rc = MDP(exp->exp_obd, renew_capa)(exp, ocapa, cb);
1668         RETURN(rc);
1669 }
1670
1671 static inline int md_unpack_capa(struct obd_export *exp,
1672                                  struct ptlrpc_request *req,
1673                                  const struct req_msg_field *field,
1674                                  struct obd_capa **oc)
1675 {
1676         int rc;
1677         ENTRY;
1678         EXP_CHECK_MD_OP(exp, unpack_capa);
1679         EXP_MD_COUNTER_INCREMENT(exp, unpack_capa);
1680         rc = MDP(exp->exp_obd, unpack_capa)(exp, req, field, oc);
1681         RETURN(rc);
1682 }
1683
1684 static inline int md_intent_getattr_async(struct obd_export *exp,
1685                                           struct md_enqueue_info *minfo,
1686                                           struct ldlm_enqueue_info *einfo)
1687 {
1688         int rc;
1689         ENTRY;
1690         EXP_CHECK_MD_OP(exp, intent_getattr_async);
1691         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
1692         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo, einfo);
1693         RETURN(rc);
1694 }
1695
1696 static inline int md_revalidate_lock(struct obd_export *exp,
1697                                      struct lookup_intent *it,
1698                                      struct lu_fid *fid, __u64 *bits)
1699 {
1700         int rc;
1701         ENTRY;
1702         EXP_CHECK_MD_OP(exp, revalidate_lock);
1703         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
1704         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
1705         RETURN(rc);
1706 }
1707
1708 static inline int md_get_fid_from_lsm(struct obd_export *exp,
1709                                       const struct lmv_stripe_md *lsm,
1710                                       const char *name, int namelen,
1711                                       struct lu_fid *fid)
1712 {
1713         int rc;
1714         ENTRY;
1715         EXP_CHECK_MD_OP(exp, get_fid_from_lsm);
1716         EXP_MD_COUNTER_INCREMENT(exp, get_fid_from_lsm);
1717         rc = MDP(exp->exp_obd, get_fid_from_lsm)(exp, lsm, name, namelen, fid);
1718         RETURN(rc);
1719 }
1720
1721 /* OBD Metadata Support */
1722
1723 extern int obd_init_caches(void);
1724 extern void obd_cleanup_caches(void);
1725
1726 /* support routines */
1727 extern struct kmem_cache *obdo_cachep;
1728
1729 #define OBDO_ALLOC(ptr)                                                       \
1730 do {                                                                          \
1731         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, GFP_NOFS);             \
1732 } while(0)
1733
1734 #define OBDO_FREE(ptr)                                                        \
1735 do {                                                                          \
1736         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1737 } while(0)
1738
1739
1740 typedef int (*register_lwp_cb)(void *data);
1741
1742 struct lwp_register_item {
1743         struct obd_export **lri_exp;
1744         register_lwp_cb     lri_cb_func;
1745         void               *lri_cb_data;
1746         struct list_head            lri_list;
1747         char                lri_name[MTI_NAME_MAXLEN];
1748 };
1749
1750 /* I'm as embarrassed about this as you are.
1751  *
1752  * <shaver> // XXX do not look into _superhack with remaining eye
1753  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1754 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1755
1756 /* obd_mount.c */
1757 #ifdef HAVE_SERVER_SUPPORT
1758 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
1759                              register_lwp_cb cb_func, void *cb_data);
1760 void lustre_deregister_lwp_item(struct obd_export **exp);
1761 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx);
1762 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx);
1763 #endif /* HAVE_SERVER_SUPPORT */
1764 int lustre_register_fs(void);
1765 int lustre_unregister_fs(void);
1766 int lustre_check_exclusion(struct super_block *sb, char *svname);
1767
1768 /* sysctl.c */
1769 extern void obd_sysctl_init (void);
1770 extern void obd_sysctl_clean (void);
1771
1772 /* uuid.c  */
1773 typedef __u8 class_uuid_t[16];
1774 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
1775
1776 /* lustre_peer.c    */
1777 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
1778 int class_add_uuid(const char *uuid, __u64 nid);
1779 int class_del_uuid (const char *uuid);
1780 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
1781 void class_init_uuidlist(void);
1782 void class_exit_uuidlist(void);
1783
1784 /* prng.c */
1785 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
1786
1787 /* statfs_pack.c */
1788 struct kstatfs;
1789 void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
1790 void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);
1791
1792 /* root squash info */
1793 struct rw_semaphore;
1794 struct root_squash_info {
1795         uid_t                   rsi_uid;
1796         gid_t                   rsi_gid;
1797         struct list_head        rsi_nosquash_nids;
1798         struct rw_semaphore     rsi_sem;
1799 };
1800
1801 int server_name2index(const char *svname, __u32 *idx, const char **endptr);
1802
1803 /* linux-module.c */
1804 extern struct miscdevice obd_psdev;
1805 int class_procfs_init(void);
1806 int class_procfs_clean(void);
1807
1808 #endif /* __LINUX_OBD_CLASS_H */