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, 2013, 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 #ifndef __KERNEL__
  40 # include <liblustre.h>
  41 #endif
  42
  43 #include <obd_support.h>
  44 #include <lustre_import.h>
  45 #include <lustre_net.h>
  46 #include <obd.h>
  47 #include <lustre_lib.h>
  48 #include <lustre/lustre_idl.h>
  49 #include <lprocfs_status.h>
  50
  51 #if defined(__linux__)
  52 #include <linux/obd_class.h>
  53 #elif defined(__APPLE__)
  54 #include <darwin/obd_class.h>
  55 #elif defined(__WINNT__)
  56 #include <winnt/obd_class.h>
  57 #else
  58 #error Unsupported operating system.
  59 #endif
  60
  61 #define OBD_STATFS_NODELAY      0x0001  /* requests should be send without delay
  62                                          * and resends for avoid deadlocks */
  63 #define OBD_STATFS_FROM_CACHE   0x0002  /* the statfs callback should not update
  64                                          * obd_osfs_age */
  65 #define OBD_STATFS_PTLRPCD      0x0004  /* requests will be sent via ptlrpcd
  66                                          * instead of a specific set. This
  67                                          * means that we cannot rely on the set
  68                                          * interpret routine to be called.
  69                                          * lov_statfs_fini() must thus be called
  70                                          * by the request interpret routine */
  71 #define OBD_STATFS_FOR_MDT0     0x0008  /* The statfs is only for retrieving
  72                                          * information from MDT0. */
  73 #define OBD_FL_PUNCH    0x00000001      /* To indicate it is punch operation */
  74
  75 /* OBD Device Declarations */
  76 extern struct obd_device *obd_devs[MAX_OBD_DEVICES];
  77 extern rwlock_t obd_dev_lock;
  78
  79 /* OBD Operations Declarations */
  80 extern struct obd_device *class_conn2obd(struct lustre_handle *);
  81 extern struct obd_device *class_exp2obd(struct obd_export *);
  82 extern int class_handle_ioctl(unsigned int cmd, unsigned long arg);
  83 extern int lustre_get_jobid(char *jobid);
  84
  85 struct lu_device_type;
  86
  87 /* genops.c */
  88 struct obd_export *class_conn2export(struct lustre_handle *);
  89 int class_register_type(struct obd_ops *, struct md_ops *, bool enable_proc,
  90                         struct lprocfs_seq_vars *module_vars,
  91 #ifndef HAVE_ONLY_PROCFS_SEQ
  92                         struct lprocfs_vars *,
  93 #endif
  94                         const char *nm, struct lu_device_type *ldt);
  95 int class_unregister_type(const char *nm);
  96
  97 struct obd_device *class_newdev(const char *type_name, const char *name);
  98 void class_release_dev(struct obd_device *obd);
  99
 100 int class_name2dev(const char *name);
 101 struct obd_device *class_name2obd(const char *name);
 102 int class_uuid2dev(struct obd_uuid *uuid);
 103 struct obd_device *class_uuid2obd(struct obd_uuid *uuid);
 104 void class_obd_list(void);
 105 struct obd_device * class_find_client_obd(struct obd_uuid *tgt_uuid,
 106                                           const char * typ_name,
 107                                           struct obd_uuid *grp_uuid);
 108 struct obd_device * class_devices_in_group(struct obd_uuid *grp_uuid,
 109                                            int *next);
 110 struct obd_device * class_num2obd(int num);
 111 int get_devices_count(void);
 112
 113 int class_notify_sptlrpc_conf(const char *fsname, int namelen);
 114
 115 char *obd_export_nid2str(struct obd_export *exp);
 116
 117 int obd_export_evict_by_nid(struct obd_device *obd, const char *nid);
 118 int obd_export_evict_by_uuid(struct obd_device *obd, const char *uuid);
 119 int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep);
 120
 121 int obd_zombie_impexp_init(void);
 122 void obd_zombie_impexp_stop(void);
 123 void obd_zombie_impexp_cull(void);
 124 void obd_zombie_barrier(void);
 125 void obd_exports_barrier(struct obd_device *obd);
 126 int kuc_len(int payload_len);
 127 struct kuc_hdr * kuc_ptr(void *p);
 128 int kuc_ispayload(void *p);
 129 void *kuc_alloc(int payload_len, int transport, int type);
 130 void kuc_free(void *p, int payload_len);
 131
 132 struct llog_handle;
 133 struct llog_rec_hdr;
 134 typedef int (*llog_cb_t)(const struct lu_env *, struct llog_handle *,
 135                          struct llog_rec_hdr *, void *);
 136 /* obd_config.c */
 137 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
 138                                      const char *new_name);
 139 int class_process_config(struct lustre_cfg *lcfg);
 140 #ifndef HAVE_ONLY_PROCFS_SEQ
 141 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 142                              struct lustre_cfg *lcfg, void *data);
 143 #endif
 144 int class_process_proc_seq_param(char *prefix, struct lprocfs_seq_vars *lvars,
 145                                  struct lustre_cfg *lcfg, void *data);
 146 int class_attach(struct lustre_cfg *lcfg);
 147 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
 148 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg);
 149 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg);
 150 struct obd_device *class_incref(struct obd_device *obd,
 151                                 const char *scope, const void *source);
 152 void class_decref(struct obd_device *obd,
 153                   const char *scope, const void *source);
 154 void dump_exports(struct obd_device *obd, int locks);
 155 int class_config_llog_handler(const struct lu_env *env,
 156                               struct llog_handle *handle,
 157                               struct llog_rec_hdr *rec, void *data);
 158 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg);
 159 int class_add_uuid(const char *uuid, __u64 nid);
 160
 161 #define CFG_F_START     0x01   /* Set when we start updating from a log */
 162 #define CFG_F_MARKER    0x02   /* We are within a maker */
 163 #define CFG_F_SKIP      0x04   /* We should ignore this cfg command */
 164 #define CFG_F_COMPAT146 0x08   /* Allow old-style logs */
 165 #define CFG_F_EXCLUDE   0x10   /* OST exclusion list */
 166
 167 /* Passed as data param to class_config_parse_llog */
 168 struct config_llog_instance {
 169         char                    *cfg_obdname;
 170         void                    *cfg_instance;
 171         struct super_block      *cfg_sb;
 172         struct obd_uuid          cfg_uuid;
 173         llog_cb_t                cfg_callback;
 174         int                      cfg_last_idx; /* for partial llog processing */
 175         int                      cfg_flags;
 176         __u32                    cfg_lwp_idx;
 177 };
 178 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 179                             char *name, struct config_llog_instance *cfg);
 180 int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 181                            char *name, struct config_llog_instance *cfg);
 182
 183 enum {
 184         CONFIG_T_CONFIG  = 0,
 185         CONFIG_T_SPTLRPC = 1,
 186         CONFIG_T_RECOVER = 2,
 187         CONFIG_T_PARAMS  = 3,
 188         CONFIG_T_MAX     = 4
 189 };
 190
 191 #define PARAMS_FILENAME "params"
 192 #define LCTL_UPCALL     "lctl"
 193
 194 /* list of active configuration logs  */
 195 struct config_llog_data {
 196         struct ldlm_res_id          cld_resid;
 197         struct config_llog_instance cld_cfg;
 198         cfs_list_t                  cld_list_chain;
 199         atomic_t                    cld_refcount;
 200         struct config_llog_data    *cld_sptlrpc;/* depended sptlrpc log */
 201         struct config_llog_data    *cld_params; /* common parameters log */
 202         struct config_llog_data    *cld_recover;/* imperative recover log */
 203         struct obd_export          *cld_mgcexp;
 204         struct mutex                cld_lock;
 205         int                         cld_type;
 206         unsigned int                cld_stopping:1, /* we were told to stop
 207                                                      * watching */
 208                                     cld_lostlock:1; /* lock not requeued */
 209         char                        cld_logname[0];
 210 };
 211
 212 struct lustre_profile {
 213         cfs_list_t       lp_list;
 214         char            *lp_profile;
 215         char            *lp_dt;
 216         char            *lp_md;
 217 };
 218
 219 struct lustre_profile *class_get_profile(const char * prof);
 220 void class_del_profile(const char *prof);
 221 void class_del_profiles(void);
 222
 223 #if LUSTRE_TRACKS_LOCK_EXP_REFS
 224
 225 void __class_export_add_lock_ref(struct obd_export *, struct ldlm_lock *);
 226 void __class_export_del_lock_ref(struct obd_export *, struct ldlm_lock *);
 227 extern void (*class_export_dump_hook)(struct obd_export *);
 228
 229 #else
 230
 231 #define __class_export_add_lock_ref(exp, lock)             do {} while(0)
 232 #define __class_export_del_lock_ref(exp, lock)             do {} while(0)
 233
 234 #endif
 235
 236 #define class_export_rpc_inc(exp)                                       \
 237 ({                                                                      \
 238         atomic_inc(&(exp)->exp_rpc_count);                              \
 239         CDEBUG(D_INFO, "RPC GETting export %p : new rpc_count %d\n",    \
 240                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 241 })
 242
 243 #define class_export_rpc_dec(exp)                                       \
 244 ({                                                                      \
 245         LASSERT_ATOMIC_POS(&exp->exp_rpc_count);                        \
 246         atomic_dec(&(exp)->exp_rpc_count);                              \
 247         CDEBUG(D_INFO, "RPC PUTting export %p : new rpc_count %d\n",    \
 248                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 249 })
 250
 251 #define class_export_lock_get(exp, lock)                                \
 252 ({                                                                      \
 253         atomic_inc(&(exp)->exp_locks_count);                            \
 254         __class_export_add_lock_ref(exp, lock);                         \
 255         CDEBUG(D_INFO, "lock GETting export %p : new locks_count %d\n", \
 256                (exp), atomic_read(&(exp)->exp_locks_count));            \
 257         class_export_get(exp);                                          \
 258 })
 259
 260 #define class_export_lock_put(exp, lock)                                \
 261 ({                                                                      \
 262         LASSERT_ATOMIC_POS(&exp->exp_locks_count);                      \
 263         atomic_dec(&(exp)->exp_locks_count);                            \
 264         __class_export_del_lock_ref(exp, lock);                         \
 265         CDEBUG(D_INFO, "lock PUTting export %p : new locks_count %d\n", \
 266                (exp), atomic_read(&(exp)->exp_locks_count));            \
 267         class_export_put(exp);                                          \
 268 })
 269
 270 #define class_export_cb_get(exp)                                        \
 271 ({                                                                      \
 272         atomic_inc(&(exp)->exp_cb_count);                               \
 273         CDEBUG(D_INFO, "callback GETting export %p : new cb_count %d\n",\
 274                (exp), atomic_read(&(exp)->exp_cb_count));               \
 275         class_export_get(exp);                                          \
 276 })
 277
 278 #define class_export_cb_put(exp)                                        \
 279 ({                                                                      \
 280         LASSERT_ATOMIC_POS(&exp->exp_cb_count);                         \
 281         atomic_dec(&(exp)->exp_cb_count);                               \
 282         CDEBUG(D_INFO, "callback PUTting export %p : new cb_count %d\n",\
 283                (exp), atomic_read(&(exp)->exp_cb_count));               \
 284         class_export_put(exp);                                          \
 285 })
 286
 287 /* genops.c */
 288 struct obd_export *class_export_get(struct obd_export *exp);
 289 void class_export_put(struct obd_export *exp);
 290 struct obd_export *class_new_export(struct obd_device *obddev,
 291                                     struct obd_uuid *cluuid);
 292 void class_unlink_export(struct obd_export *exp);
 293
 294 struct obd_import *class_import_get(struct obd_import *);
 295 void class_import_put(struct obd_import *);
 296 struct obd_import *class_new_import(struct obd_device *obd);
 297 void class_destroy_import(struct obd_import *exp);
 298
 299 struct obd_type *class_search_type(const char *name);
 300 struct obd_type *class_get_type(const char *name);
 301 void class_put_type(struct obd_type *type);
 302 int class_connect(struct lustre_handle *conn, struct obd_device *obd,
 303                   struct obd_uuid *cluuid);
 304 int class_disconnect(struct obd_export *exp);
 305 void class_fail_export(struct obd_export *exp);
 306 int class_connected_export(struct obd_export *exp);
 307 void class_disconnect_exports(struct obd_device *obddev);
 308 int class_manual_cleanup(struct obd_device *obd);
 309 void class_disconnect_stale_exports(struct obd_device *,
 310                                     int (*test_export)(struct obd_export *));
 311 static inline enum obd_option exp_flags_from_obd(struct obd_device *obd)
 312 {
 313         return ((obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 314                 (obd->obd_force ? OBD_OPT_FORCE : 0) |
 315                 (obd->obd_abort_recovery ? OBD_OPT_ABORT_RECOV : 0) |
 316                 0);
 317 }
 318
 319 #ifdef HAVE_SERVER_SUPPORT
 320 static inline struct lu_target *class_exp2tgt(struct obd_export *exp)
 321 {
 322         LASSERT(exp->exp_obd);
 323         return exp->exp_obd->u.obt.obt_lut;
 324 }
 325
 326 static inline struct lr_server_data *class_server_data(struct obd_device *obd)
 327 {
 328         LASSERT(obd->u.obt.obt_lut);
 329         return &obd->u.obt.obt_lut->lut_lsd;
 330 }
 331 #endif
 332
 333 void obdo_cpy_md(struct obdo *dst, struct obdo *src, obd_flag valid);
 334 void obdo_to_ioobj(struct obdo *oa, struct obd_ioobj *ioobj);
 335 void obdo_from_iattr(struct obdo *oa, struct iattr *attr,
 336                      unsigned int ia_valid);
 337 void iattr_from_obdo(struct iattr *attr, struct obdo *oa, obd_flag valid);
 338 void md_from_obdo(struct md_op_data *op_data, struct obdo *oa, obd_flag valid);
 339 void obdo_from_md(struct obdo *oa, struct md_op_data *op_data,
 340                   unsigned int valid);
 341
 342 #define OBT(dev)        (dev)->obd_type
 343 #define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 344 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
 345 #define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
 346
 347 /* Ensure obd_setup: used for cleanup which must be called
 348    while obd is stopping */
 349 #define OBD_CHECK_DEV(obd)                                      \
 350 do {                                                            \
 351         if (!(obd)) {                                           \
 352                 CERROR("NULL device\n");                        \
 353                 RETURN(-ENODEV);                                \
 354         }                                                       \
 355 } while (0)
 356
 357 /* ensure obd_setup and !obd_stopping */
 358 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 359 do {                                                            \
 360         OBD_CHECK_DEV(obd);                                     \
 361         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 362                 CERROR("Device %d not setup\n",                 \
 363                        (obd)->obd_minor);                       \
 364                 RETURN(-ENODEV);                                \
 365         }                                                       \
 366 } while (0)
 367
 368
 369 #ifdef LPROCFS
 370 #define OBD_COUNTER_OFFSET(op)                                                 \
 371         ((offsetof(struct obd_ops, o_ ## op) -                                 \
 372           offsetof(struct obd_ops, o_iocontrol))                               \
 373          / sizeof(((struct obd_ops *)NULL)->o_iocontrol))
 374
 375 /* The '- 1' below is for o_owner. */
 376 #define NUM_OBD_STATS                                                          \
 377         (sizeof(struct obd_ops) /                                              \
 378          sizeof(((struct obd_ops *)NULL)->o_iocontrol) - 1)
 379
 380 #define OBD_COUNTER_INCREMENT(obd, op)                                         \
 381         lprocfs_counter_incr((obd)->obd_stats,                                 \
 382                              (obd)->obd_cntr_base + OBD_COUNTER_OFFSET(op))
 383
 384 #define EXP_COUNTER_INCREMENT(exp, op)                                         \
 385         do {                                                                   \
 386                 unsigned int _off;                                             \
 387                 _off = (exp)->exp_obd->obd_cntr_base + OBD_COUNTER_OFFSET(op); \
 388                 lprocfs_counter_incr((exp)->exp_obd->obd_stats, _off);         \
 389                 if ((exp)->exp_obd->obd_uses_nid_stats &&                      \
 390                     (exp)->exp_nid_stats != NULL)                              \
 391                         lprocfs_counter_incr((exp)->exp_nid_stats->nid_stats,  \
 392                                              _off);                            \
 393         } while (0)
 394
 395 #define _MD_COUNTER_OFFSET(m_op)                                               \
 396         ((offsetof(struct md_ops, m_op) -                                      \
 397           offsetof(struct md_ops, MD_STATS_FIRST_OP)) /                        \
 398          sizeof(((struct md_ops *)NULL)->MD_STATS_FIRST_OP))
 399
 400 #define MD_COUNTER_OFFSET(op) _MD_COUNTER_OFFSET(m_ ## op)
 401
 402 #define NUM_MD_STATS                                                           \
 403         (_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) -                                \
 404          _MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) + 1)
 405
 406 /* Note that we only increment md counters for ops whose offset is less
 407  * than NUM_MD_STATS. This is explained in a comment in the definition
 408  * of struct md_ops. */
 409 #define EXP_MD_COUNTER_INCREMENT(exp, op)                                      \
 410         do {                                                                   \
 411                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS)                      \
 412                         lprocfs_counter_incr((exp)->exp_obd->obd_md_stats,     \
 413                                         (exp)->exp_obd->obd_md_cntr_base +     \
 414                                         MD_COUNTER_OFFSET(op));                \
 415         } while (0)
 416
 417 #else
 418 #define OBD_COUNTER_OFFSET(op)
 419 #define OBD_COUNTER_INCREMENT(obd, op)
 420 #define EXP_COUNTER_INCREMENT(exp, op)
 421 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 422 #endif
 423
 424 static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
 425 {
 426         /* Always add in ldlm_stats */
 427         tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC
 428                                                   ,LPROCFS_STATS_FLAG_NOPERCPU);
 429         if (tmp->nid_ldlm_stats == NULL)
 430                 return -ENOMEM;
 431
 432         lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
 433
 434         return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
 435                                       tmp->nid_ldlm_stats);
 436 }
 437
 438 #define EXP_CHECK_MD_OP(exp, op)                                \
 439 do {                                                            \
 440         if ((exp) == NULL) {                                    \
 441                 CERROR("obd_" #op ": NULL export\n");           \
 442                 RETURN(-ENODEV);                                \
 443         }                                                       \
 444         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 445                 CERROR("obd_" #op ": cleaned up obd\n");        \
 446                 RETURN(-EOPNOTSUPP);                            \
 447         }                                                       \
 448         if (!OBT((exp)->exp_obd) || !MDP((exp)->exp_obd, op)) { \
 449                 CERROR("obd_" #op ": dev %s/%d no operation\n", \
 450                        (exp)->exp_obd->obd_name,                \
 451                        (exp)->exp_obd->obd_minor);              \
 452                 RETURN(-EOPNOTSUPP);                            \
 453         }                                                       \
 454 } while (0)
 455
 456
 457 #define OBD_CHECK_DT_OP(obd, op, err)                           \
 458 do {                                                            \
 459         if (!OBT(obd) || !OBP((obd), op)) {                     \
 460                 if (err)                                        \
 461                         CERROR("obd_" #op ": dev %d no operation\n",    \
 462                                obd->obd_minor);                 \
 463                 RETURN(err);                                    \
 464         }                                                       \
 465 } while (0)
 466
 467 #define EXP_CHECK_DT_OP(exp, op)                                \
 468 do {                                                            \
 469         if ((exp) == NULL) {                                    \
 470                 CERROR("obd_" #op ": NULL export\n");           \
 471                 RETURN(-ENODEV);                                \
 472         }                                                       \
 473         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 474                 CERROR("obd_" #op ": cleaned up obd\n");        \
 475                 RETURN(-EOPNOTSUPP);                            \
 476         }                                                       \
 477         if (!OBT((exp)->exp_obd) || !OBP((exp)->exp_obd, op)) { \
 478                 CERROR("obd_" #op ": dev %d no operation\n",    \
 479                        (exp)->exp_obd->obd_minor);              \
 480                 RETURN(-EOPNOTSUPP);                            \
 481         }                                                       \
 482 } while (0)
 483
 484 #define CTXT_CHECK_OP(ctxt, op, err)                                 \
 485 do {                                                                 \
 486         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {             \
 487                 if (err)                                             \
 488                         CERROR("lop_" #op ": dev %d no operation\n", \
 489                                ctxt->loc_obd->obd_minor);            \
 490                 RETURN(err);                                         \
 491         }                                                            \
 492 } while (0)
 493
 494 static inline int class_devno_max(void)
 495 {
 496         return MAX_OBD_DEVICES;
 497 }
 498
 499 static inline int obd_get_info(const struct lu_env *env,
 500                                struct obd_export *exp, __u32 keylen,
 501                                void *key, __u32 *vallen, void *val,
 502                                struct lov_stripe_md *lsm)
 503 {
 504         int rc;
 505         ENTRY;
 506
 507         EXP_CHECK_DT_OP(exp, get_info);
 508         EXP_COUNTER_INCREMENT(exp, get_info);
 509
 510         rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val,
 511                                          lsm);
 512         RETURN(rc);
 513 }
 514
 515 static inline int obd_set_info_async(const struct lu_env *env,
 516                                      struct obd_export *exp, obd_count keylen,
 517                                      void *key, obd_count vallen, void *val,
 518                                      struct ptlrpc_request_set *set)
 519 {
 520         int rc;
 521         ENTRY;
 522
 523         EXP_CHECK_DT_OP(exp, set_info_async);
 524         EXP_COUNTER_INCREMENT(exp, set_info_async);
 525
 526         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 527                                                val, set);
 528         RETURN(rc);
 529 }
 530
 531 /*
 532  * obd-lu integration.
 533  *
 534  * Functionality is being moved into new lu_device-based layering, but some
 535  * pieces of configuration process are still based on obd devices.
 536  *
 537  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 538  * subsume ->o_setup() methods of obd devices they replace. The same for
 539  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 540  * result, obd_setup() and obd_process_config() branch and call one XOR
 541  * another.
 542  *
 543  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 544  * lu_device_type_operations::ldto_device_free() fully implement the
 545  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 546  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 547  */
 548
 549 #define DECLARE_LU_VARS(ldt, d)                 \
 550         struct lu_device_type *ldt;       \
 551         struct lu_device *d
 552
 553 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 554 {
 555         int rc;
 556         DECLARE_LU_VARS(ldt, d);
 557         ENTRY;
 558
 559         ldt = obd->obd_type->typ_lu;
 560         if (ldt != NULL) {
 561                 struct lu_context  session_ctx;
 562                 struct lu_env env;
 563                 lu_context_init(&session_ctx, LCT_SESSION | LCT_SERVER_SESSION);
 564                 session_ctx.lc_thread = NULL;
 565                 lu_context_enter(&session_ctx);
 566
 567                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 568                 if (rc == 0) {
 569                         env.le_ses = &session_ctx;
 570                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 571                         lu_env_fini(&env);
 572                         if (!IS_ERR(d)) {
 573                                 obd->obd_lu_dev = d;
 574                                 d->ld_obd = obd;
 575                                 rc = 0;
 576                         } else
 577                                 rc = PTR_ERR(d);
 578                 }
 579                 lu_context_exit(&session_ctx);
 580                 lu_context_fini(&session_ctx);
 581
 582         } else {
 583                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
 584                 OBD_COUNTER_INCREMENT(obd, setup);
 585                 rc = OBP(obd, setup)(obd, cfg);
 586         }
 587         RETURN(rc);
 588 }
 589
 590 static inline int obd_precleanup(struct obd_device *obd,
 591                                  enum obd_cleanup_stage cleanup_stage)
 592 {
 593         int rc;
 594         DECLARE_LU_VARS(ldt, d);
 595         ENTRY;
 596
 597         OBD_CHECK_DEV(obd);
 598         ldt = obd->obd_type->typ_lu;
 599         d = obd->obd_lu_dev;
 600         if (ldt != NULL && d != NULL) {
 601                 if (cleanup_stage == OBD_CLEANUP_EXPORTS) {
 602                         struct lu_env env;
 603
 604                         rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 605                         if (rc == 0) {
 606                                 ldt->ldt_ops->ldto_device_fini(&env, d);
 607                                 lu_env_fini(&env);
 608                         }
 609                 }
 610         }
 611         OBD_CHECK_DT_OP(obd, precleanup, 0);
 612         OBD_COUNTER_INCREMENT(obd, precleanup);
 613
 614         rc = OBP(obd, precleanup)(obd, cleanup_stage);
 615         RETURN(rc);
 616 }
 617
 618 static inline int obd_cleanup(struct obd_device *obd)
 619 {
 620         int rc;
 621         DECLARE_LU_VARS(ldt, d);
 622         ENTRY;
 623
 624         OBD_CHECK_DEV(obd);
 625
 626         ldt = obd->obd_type->typ_lu;
 627         d = obd->obd_lu_dev;
 628         if (ldt != NULL && d != NULL) {
 629                 struct lu_env env;
 630
 631                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 632                 if (rc == 0) {
 633                         ldt->ldt_ops->ldto_device_free(&env, d);
 634                         lu_env_fini(&env);
 635                         obd->obd_lu_dev = NULL;
 636                 }
 637         }
 638         OBD_CHECK_DT_OP(obd, cleanup, 0);
 639         OBD_COUNTER_INCREMENT(obd, cleanup);
 640
 641         rc = OBP(obd, cleanup)(obd);
 642         RETURN(rc);
 643 }
 644
 645 static inline void obd_cleanup_client_import(struct obd_device *obd)
 646 {
 647         ENTRY;
 648
 649         /* If we set up but never connected, the
 650            client import will not have been cleaned. */
 651         down_write(&obd->u.cli.cl_sem);
 652         if (obd->u.cli.cl_import) {
 653                 struct obd_import *imp;
 654                 imp = obd->u.cli.cl_import;
 655                 CDEBUG(D_CONFIG, "%s: client import never connected\n",
 656                        obd->obd_name);
 657                 ptlrpc_invalidate_import(imp);
 658                 if (imp->imp_rq_pool) {
 659                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
 660                         imp->imp_rq_pool = NULL;
 661                 }
 662                 client_destroy_import(imp);
 663                 obd->u.cli.cl_import = NULL;
 664         }
 665         up_write(&obd->u.cli.cl_sem);
 666
 667         EXIT;
 668 }
 669
 670 static inline int
 671 obd_process_config(struct obd_device *obd, int datalen, void *data)
 672 {
 673         int rc;
 674         DECLARE_LU_VARS(ldt, d);
 675         ENTRY;
 676
 677         OBD_CHECK_DEV(obd);
 678
 679         obd->obd_process_conf = 1;
 680         ldt = obd->obd_type->typ_lu;
 681         d = obd->obd_lu_dev;
 682         if (ldt != NULL && d != NULL) {
 683                 struct lu_env env;
 684
 685                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 686                 if (rc == 0) {
 687                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 688                         lu_env_fini(&env);
 689                 }
 690         } else {
 691                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
 692                 rc = OBP(obd, process_config)(obd, datalen, data);
 693         }
 694         OBD_COUNTER_INCREMENT(obd, process_config);
 695         obd->obd_process_conf = 0;
 696
 697         RETURN(rc);
 698 }
 699
 700 /* Pack an in-memory MD struct for storage on disk.
 701  * Returns +ve size of packed MD (0 for free), or -ve error.
 702  *
 703  * If @disk_tgt == NULL, MD size is returned (max size if @mem_src == NULL).
 704  * If @*disk_tgt != NULL and @mem_src == NULL, @*disk_tgt will be freed.
 705  * If @*disk_tgt == NULL, it will be allocated
 706  */
 707 static inline int obd_packmd(struct obd_export *exp,
 708                              struct lov_mds_md **disk_tgt,
 709                              struct lov_stripe_md *mem_src)
 710 {
 711         int rc;
 712         ENTRY;
 713
 714         EXP_CHECK_DT_OP(exp, packmd);
 715         EXP_COUNTER_INCREMENT(exp, packmd);
 716
 717         rc = OBP(exp->exp_obd, packmd)(exp, disk_tgt, mem_src);
 718         RETURN(rc);
 719 }
 720
 721 static inline int obd_size_diskmd(struct obd_export *exp,
 722                                   struct lov_stripe_md *mem_src)
 723 {
 724         return obd_packmd(exp, NULL, mem_src);
 725 }
 726
 727 static inline int obd_free_diskmd(struct obd_export *exp,
 728                                   struct lov_mds_md **disk_tgt)
 729 {
 730         LASSERT(disk_tgt);
 731         LASSERT(*disk_tgt);
 732         /*
 733          * LU-2590, for caller's convenience, *disk_tgt could be host
 734          * endianness, it needs swab to LE if necessary, while just
 735          * lov_mds_md header needs it for figuring out how much memory
 736          * needs to be freed.
 737          */
 738         if ((cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) &&
 739             (((*disk_tgt)->lmm_magic == LOV_MAGIC_V1) ||
 740              ((*disk_tgt)->lmm_magic == LOV_MAGIC_V3)))
 741                 lustre_swab_lov_mds_md(*disk_tgt);
 742         return obd_packmd(exp, disk_tgt, NULL);
 743 }
 744
 745 /* Unpack an MD struct from disk to in-memory format.
 746  * Returns +ve size of unpacked MD (0 for free), or -ve error.
 747  *
 748  * If @mem_tgt == NULL, MD size is returned (max size if @disk_src == NULL).
 749  * If @*mem_tgt != NULL and @disk_src == NULL, @*mem_tgt will be freed.
 750  * If @*mem_tgt == NULL, it will be allocated
 751  */
 752 static inline int obd_unpackmd(struct obd_export *exp,
 753                                struct lov_stripe_md **mem_tgt,
 754                                struct lov_mds_md *disk_src,
 755                                int disk_len)
 756 {
 757         int rc;
 758         ENTRY;
 759
 760         EXP_CHECK_DT_OP(exp, unpackmd);
 761         EXP_COUNTER_INCREMENT(exp, unpackmd);
 762
 763         rc = OBP(exp->exp_obd, unpackmd)(exp, mem_tgt, disk_src, disk_len);
 764         RETURN(rc);
 765 }
 766
 767 /* helper functions */
 768 static inline int obd_alloc_memmd(struct obd_export *exp,
 769                                   struct lov_stripe_md **mem_tgt)
 770 {
 771         LASSERT(mem_tgt);
 772         LASSERT(*mem_tgt == NULL);
 773         return obd_unpackmd(exp, mem_tgt, NULL, 0);
 774 }
 775
 776 static inline int obd_free_memmd(struct obd_export *exp,
 777                                  struct lov_stripe_md **mem_tgt)
 778 {
 779         int rc;
 780
 781         LASSERT(mem_tgt);
 782         LASSERT(*mem_tgt);
 783         rc = obd_unpackmd(exp, mem_tgt, NULL, 0);
 784         *mem_tgt = NULL;
 785         return rc;
 786 }
 787
 788 static inline int obd_create_async(struct obd_export *exp,
 789                                    struct obd_info *oinfo,
 790                                    struct lov_stripe_md **ea,
 791                                    struct obd_trans_info *oti)
 792 {
 793         int rc;
 794         ENTRY;
 795
 796         EXP_CHECK_DT_OP(exp, create_async);
 797         EXP_COUNTER_INCREMENT(exp, create_async);
 798
 799         rc = OBP(exp->exp_obd, create_async)(exp, oinfo, ea, oti);
 800         RETURN(rc);
 801 }
 802
 803 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 804                              struct obdo *obdo, struct lov_stripe_md **ea,
 805                              struct obd_trans_info *oti)
 806 {
 807         int rc;
 808         ENTRY;
 809
 810         EXP_CHECK_DT_OP(exp, create);
 811         EXP_COUNTER_INCREMENT(exp, create);
 812
 813         rc = OBP(exp->exp_obd, create)(env, exp, obdo, ea, oti);
 814         RETURN(rc);
 815 }
 816
 817 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 818                               struct obdo *obdo, struct lov_stripe_md *ea,
 819                               struct obd_trans_info *oti,
 820                               struct obd_export *md_exp, void *capa)
 821 {
 822         int rc;
 823         ENTRY;
 824
 825         EXP_CHECK_DT_OP(exp, destroy);
 826         EXP_COUNTER_INCREMENT(exp, destroy);
 827
 828         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo, ea, oti, md_exp, capa);
 829         RETURN(rc);
 830 }
 831
 832 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 833                               struct obd_info *oinfo)
 834 {
 835         int rc;
 836         ENTRY;
 837
 838         EXP_CHECK_DT_OP(exp, getattr);
 839         EXP_COUNTER_INCREMENT(exp, getattr);
 840
 841         rc = OBP(exp->exp_obd, getattr)(env, exp, oinfo);
 842         RETURN(rc);
 843 }
 844
 845 static inline int obd_getattr_async(struct obd_export *exp,
 846                                     struct obd_info *oinfo,
 847                                     struct ptlrpc_request_set *set)
 848 {
 849         int rc;
 850         ENTRY;
 851
 852         EXP_CHECK_DT_OP(exp, getattr_async);
 853         EXP_COUNTER_INCREMENT(exp, getattr_async);
 854
 855         rc = OBP(exp->exp_obd, getattr_async)(exp, oinfo, set);
 856         RETURN(rc);
 857 }
 858
 859 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 860                               struct obd_info *oinfo,
 861                               struct obd_trans_info *oti)
 862 {
 863         int rc;
 864         ENTRY;
 865
 866         EXP_CHECK_DT_OP(exp, setattr);
 867         EXP_COUNTER_INCREMENT(exp, setattr);
 868
 869         rc = OBP(exp->exp_obd, setattr)(env, exp, oinfo, oti);
 870         RETURN(rc);
 871 }
 872
 873 /* This performs all the requests set init/wait/destroy actions. */
 874 static inline int obd_setattr_rqset(struct obd_export *exp,
 875                                     struct obd_info *oinfo,
 876                                     struct obd_trans_info *oti)
 877 {
 878         struct ptlrpc_request_set *set = NULL;
 879         int rc;
 880         ENTRY;
 881
 882         EXP_CHECK_DT_OP(exp, setattr_async);
 883         EXP_COUNTER_INCREMENT(exp, setattr_async);
 884
 885         set =  ptlrpc_prep_set();
 886         if (set == NULL)
 887                 RETURN(-ENOMEM);
 888
 889         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 890         if (rc == 0)
 891                 rc = ptlrpc_set_wait(set);
 892         ptlrpc_set_destroy(set);
 893         RETURN(rc);
 894 }
 895
 896 /* This adds all the requests into @set if @set != NULL, otherwise
 897    all requests are sent asynchronously without waiting for response. */
 898 static inline int obd_setattr_async(struct obd_export *exp,
 899                                     struct obd_info *oinfo,
 900                                     struct obd_trans_info *oti,
 901                                     struct ptlrpc_request_set *set)
 902 {
 903         int rc;
 904         ENTRY;
 905
 906         EXP_CHECK_DT_OP(exp, setattr_async);
 907         EXP_COUNTER_INCREMENT(exp, setattr_async);
 908
 909         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 910         RETURN(rc);
 911 }
 912
 913 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 914                                int priority)
 915 {
 916         struct obd_device *obd = imp->imp_obd;
 917         int rc;
 918         ENTRY;
 919
 920         OBD_CHECK_DEV_ACTIVE(obd);
 921         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 922         OBD_COUNTER_INCREMENT(obd, add_conn);
 923
 924         rc = OBP(obd, add_conn)(imp, uuid, priority);
 925         RETURN(rc);
 926 }
 927
 928 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 929 {
 930         struct obd_device *obd = imp->imp_obd;
 931         int rc;
 932         ENTRY;
 933
 934         OBD_CHECK_DEV_ACTIVE(obd);
 935         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 936         OBD_COUNTER_INCREMENT(obd, del_conn);
 937
 938         rc = OBP(obd, del_conn)(imp, uuid);
 939         RETURN(rc);
 940 }
 941
 942 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 943 {
 944         struct obd_uuid *uuid;
 945         ENTRY;
 946
 947         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 948         EXP_COUNTER_INCREMENT(exp, get_uuid);
 949
 950         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 951         RETURN(uuid);
 952 }
 953
 954 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 955  * @param exp New export handle
 956  * @param d Connect data, supported flags are set, flags also understood
 957  *    by obd are returned.
 958  */
 959 static inline int obd_connect(const struct lu_env *env,
 960                               struct obd_export **exp,struct obd_device *obd,
 961                               struct obd_uuid *cluuid,
 962                               struct obd_connect_data *data,
 963                               void *localdata)
 964 {
 965         int rc;
 966         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 967                                                    * check */
 968         ENTRY;
 969
 970         OBD_CHECK_DEV_ACTIVE(obd);
 971         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
 972         OBD_COUNTER_INCREMENT(obd, connect);
 973
 974         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 975         /* check that only subset is granted */
 976         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
 977                                     data->ocd_connect_flags));
 978         RETURN(rc);
 979 }
 980
 981 static inline int obd_reconnect(const struct lu_env *env,
 982                                 struct obd_export *exp,
 983                                 struct obd_device *obd,
 984                                 struct obd_uuid *cluuid,
 985                                 struct obd_connect_data *d,
 986                                 void *localdata)
 987 {
 988         int rc;
 989         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
 990                                                    * check */
 991
 992         ENTRY;
 993
 994         OBD_CHECK_DEV_ACTIVE(obd);
 995         OBD_CHECK_DT_OP(obd, reconnect, 0);
 996         OBD_COUNTER_INCREMENT(obd, reconnect);
 997
 998         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 999         /* check that only subset is granted */
1000         LASSERT(ergo(d != NULL,
1001                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
1002         RETURN(rc);
1003 }
1004
1005 static inline int obd_disconnect(struct obd_export *exp)
1006 {
1007         int rc;
1008         ENTRY;
1009
1010         EXP_CHECK_DT_OP(exp, disconnect);
1011         EXP_COUNTER_INCREMENT(exp, disconnect);
1012
1013         rc = OBP(exp->exp_obd, disconnect)(exp);
1014         RETURN(rc);
1015 }
1016
1017 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
1018                                enum lu_cli_type type)
1019 {
1020         int rc;
1021         ENTRY;
1022
1023         OBD_CHECK_DT_OP(obd, fid_init, 0);
1024         OBD_COUNTER_INCREMENT(obd, fid_init);
1025
1026         rc = OBP(obd, fid_init)(obd, exp, type);
1027         RETURN(rc);
1028 }
1029
1030 static inline int obd_fid_fini(struct obd_device *obd)
1031 {
1032         int rc;
1033         ENTRY;
1034
1035         OBD_CHECK_DT_OP(obd, fid_fini, 0);
1036         OBD_COUNTER_INCREMENT(obd, fid_fini);
1037
1038         rc = OBP(obd, fid_fini)(obd);
1039         RETURN(rc);
1040 }
1041
1042 static inline int obd_fid_alloc(struct obd_export *exp,
1043                                 struct lu_fid *fid,
1044                                 struct md_op_data *op_data)
1045 {
1046         int rc;
1047         ENTRY;
1048
1049         EXP_CHECK_DT_OP(exp, fid_alloc);
1050         EXP_COUNTER_INCREMENT(exp, fid_alloc);
1051
1052         rc = OBP(exp->exp_obd, fid_alloc)(exp, fid, op_data);
1053         RETURN(rc);
1054 }
1055
1056 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
1057 {
1058         int rc;
1059         ENTRY;
1060
1061         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
1062         EXP_COUNTER_INCREMENT(exp, ping);
1063
1064         rc = OBP(exp->exp_obd, ping)(env, exp);
1065         RETURN(rc);
1066 }
1067
1068 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
1069 {
1070         int rc;
1071         ENTRY;
1072
1073         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
1074         OBD_COUNTER_INCREMENT(obd, pool_new);
1075
1076         rc = OBP(obd, pool_new)(obd, poolname);
1077         RETURN(rc);
1078 }
1079
1080 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
1081 {
1082         int rc;
1083         ENTRY;
1084
1085         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
1086         OBD_COUNTER_INCREMENT(obd, pool_del);
1087
1088         rc = OBP(obd, pool_del)(obd, poolname);
1089         RETURN(rc);
1090 }
1091
1092 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
1093 {
1094         int rc;
1095         ENTRY;
1096
1097         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
1098         OBD_COUNTER_INCREMENT(obd, pool_add);
1099
1100         rc = OBP(obd, pool_add)(obd, poolname, ostname);
1101         RETURN(rc);
1102 }
1103
1104 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
1105 {
1106         int rc;
1107         ENTRY;
1108
1109         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
1110         OBD_COUNTER_INCREMENT(obd, pool_rem);
1111
1112         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
1113         RETURN(rc);
1114 }
1115
1116 static inline void obd_getref(struct obd_device *obd)
1117 {
1118         ENTRY;
1119         if (OBT(obd) && OBP(obd, getref)) {
1120                 OBD_COUNTER_INCREMENT(obd, getref);
1121                 OBP(obd, getref)(obd);
1122         }
1123         EXIT;
1124 }
1125
1126 static inline void obd_putref(struct obd_device *obd)
1127 {
1128         ENTRY;
1129         if (OBT(obd) && OBP(obd, putref)) {
1130                 OBD_COUNTER_INCREMENT(obd, putref);
1131                 OBP(obd, putref)(obd);
1132         }
1133         EXIT;
1134 }
1135
1136 static inline int obd_init_export(struct obd_export *exp)
1137 {
1138         int rc = 0;
1139
1140         ENTRY;
1141         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1142             OBP((exp)->exp_obd, init_export))
1143                 rc = OBP(exp->exp_obd, init_export)(exp);
1144         RETURN(rc);
1145 }
1146
1147 static inline int obd_destroy_export(struct obd_export *exp)
1148 {
1149         ENTRY;
1150         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1151             OBP((exp)->exp_obd, destroy_export))
1152                 OBP(exp->exp_obd, destroy_export)(exp);
1153         RETURN(0);
1154 }
1155
1156 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1157  * If the cache is older than @max_age we will get a new value from the
1158  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1159 static inline int obd_statfs_async(struct obd_export *exp,
1160                                    struct obd_info *oinfo,
1161                                    __u64 max_age,
1162                                    struct ptlrpc_request_set *rqset)
1163 {
1164         int rc = 0;
1165         struct obd_device *obd;
1166         ENTRY;
1167
1168         if (exp == NULL || exp->exp_obd == NULL)
1169                 RETURN(-EINVAL);
1170
1171         obd = exp->exp_obd;
1172         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1173         OBD_COUNTER_INCREMENT(obd, statfs);
1174
1175         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
1176                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1177         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1178                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1179         } else {
1180                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
1181                        " objects "LPU64"/"LPU64"\n",
1182                        obd->obd_name, &obd->obd_osfs,
1183                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1184                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1185                 spin_lock(&obd->obd_osfs_lock);
1186                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1187                 spin_unlock(&obd->obd_osfs_lock);
1188                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1189                 if (oinfo->oi_cb_up)
1190                         oinfo->oi_cb_up(oinfo, 0);
1191         }
1192         RETURN(rc);
1193 }
1194
1195 static inline int obd_statfs_rqset(struct obd_export *exp,
1196                                    struct obd_statfs *osfs, __u64 max_age,
1197                                    __u32 flags)
1198 {
1199         struct ptlrpc_request_set *set = NULL;
1200         struct obd_info oinfo = { { { 0 } } };
1201         int rc = 0;
1202         ENTRY;
1203
1204         set =  ptlrpc_prep_set();
1205         if (set == NULL)
1206                 RETURN(-ENOMEM);
1207
1208         oinfo.oi_osfs = osfs;
1209         oinfo.oi_flags = flags;
1210         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1211         if (rc == 0)
1212                 rc = ptlrpc_set_wait(set);
1213         ptlrpc_set_destroy(set);
1214         RETURN(rc);
1215 }
1216
1217 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1218  * If the cache is older than @max_age we will get a new value from the
1219  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1220 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1221                              struct obd_statfs *osfs, __u64 max_age,
1222                              __u32 flags)
1223 {
1224         int rc = 0;
1225         struct obd_device *obd = exp->exp_obd;
1226         ENTRY;
1227
1228         if (obd == NULL)
1229                 RETURN(-EINVAL);
1230
1231         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1232         OBD_COUNTER_INCREMENT(obd, statfs);
1233
1234         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
1235                obd->obd_osfs_age, max_age);
1236         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1237                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1238                 if (rc == 0) {
1239                         spin_lock(&obd->obd_osfs_lock);
1240                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1241                         obd->obd_osfs_age = cfs_time_current_64();
1242                         spin_unlock(&obd->obd_osfs_lock);
1243                 }
1244         } else {
1245                 CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
1246                        " objects "LPU64"/"LPU64"\n",
1247                        obd->obd_name, &obd->obd_osfs,
1248                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1249                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1250                 spin_lock(&obd->obd_osfs_lock);
1251                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1252                 spin_unlock(&obd->obd_osfs_lock);
1253         }
1254         RETURN(rc);
1255 }
1256
1257 static inline int obd_preprw(const struct lu_env *env, int cmd,
1258                              struct obd_export *exp, struct obdo *oa,
1259                              int objcount, struct obd_ioobj *obj,
1260                              struct niobuf_remote *remote, int *pages,
1261                              struct niobuf_local *local,
1262                              struct obd_trans_info *oti,
1263                              struct lustre_capa *capa)
1264 {
1265         int rc;
1266         ENTRY;
1267
1268         EXP_CHECK_DT_OP(exp, preprw);
1269         EXP_COUNTER_INCREMENT(exp, preprw);
1270
1271         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1272                                        pages, local, oti, capa);
1273         RETURN(rc);
1274 }
1275
1276 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1277                                struct obd_export *exp, struct obdo *oa,
1278                                int objcount, struct obd_ioobj *obj,
1279                                struct niobuf_remote *rnb, int pages,
1280                                struct niobuf_local *local,
1281                                struct obd_trans_info *oti, int rc)
1282 {
1283         ENTRY;
1284
1285         EXP_CHECK_DT_OP(exp, commitrw);
1286         EXP_COUNTER_INCREMENT(exp, commitrw);
1287
1288         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1289                                          rnb, pages, local, oti, rc);
1290         RETURN(rc);
1291 }
1292
1293 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1294                                 int len, void *karg, void *uarg)
1295 {
1296         int rc;
1297         ENTRY;
1298
1299         EXP_CHECK_DT_OP(exp, iocontrol);
1300         EXP_COUNTER_INCREMENT(exp, iocontrol);
1301
1302         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1303         RETURN(rc);
1304 }
1305
1306 static inline int obd_change_cbdata(struct obd_export *exp,
1307                                     struct lov_stripe_md *lsm,
1308                                     ldlm_iterator_t it, void *data)
1309 {
1310         int rc;
1311         ENTRY;
1312
1313         EXP_CHECK_DT_OP(exp, change_cbdata);
1314         EXP_COUNTER_INCREMENT(exp, change_cbdata);
1315
1316         rc = OBP(exp->exp_obd, change_cbdata)(exp, lsm, it, data);
1317         RETURN(rc);
1318 }
1319
1320 static inline int obd_find_cbdata(struct obd_export *exp,
1321                                   struct lov_stripe_md *lsm,
1322                                   ldlm_iterator_t it, void *data)
1323 {
1324         int rc;
1325         ENTRY;
1326
1327         EXP_CHECK_DT_OP(exp, find_cbdata);
1328         EXP_COUNTER_INCREMENT(exp, find_cbdata);
1329
1330         rc = OBP(exp->exp_obd, find_cbdata)(exp, lsm, it, data);
1331         RETURN(rc);
1332 }
1333
1334 static inline int obd_pin(struct obd_export *exp, const struct lu_fid *fid,
1335                           struct obd_capa *oc, struct obd_client_handle *handle,
1336                           int flag)
1337 {
1338         int rc;
1339         ENTRY;
1340
1341         EXP_CHECK_DT_OP(exp, pin);
1342         EXP_COUNTER_INCREMENT(exp, pin);
1343
1344         rc = OBP(exp->exp_obd, pin)(exp, fid, oc, handle, flag);
1345         RETURN(rc);
1346 }
1347
1348 static inline int obd_unpin(struct obd_export *exp,
1349                             struct obd_client_handle *handle, int flag)
1350 {
1351         int rc;
1352         ENTRY;
1353
1354         EXP_CHECK_DT_OP(exp, unpin);
1355         EXP_COUNTER_INCREMENT(exp, unpin);
1356
1357         rc = OBP(exp->exp_obd, unpin)(exp, handle, flag);
1358         RETURN(rc);
1359 }
1360
1361
1362 static inline void obd_import_event(struct obd_device *obd,
1363                                     struct obd_import *imp,
1364                                     enum obd_import_event event)
1365 {
1366         ENTRY;
1367         if (!obd) {
1368                 CERROR("NULL device\n");
1369                 EXIT;
1370                 return;
1371         }
1372         if (obd->obd_set_up && OBP(obd, import_event)) {
1373                 OBD_COUNTER_INCREMENT(obd, import_event);
1374                 OBP(obd, import_event)(obd, imp, event);
1375         }
1376         EXIT;
1377 }
1378
1379 static inline int obd_llog_connect(struct obd_export *exp,
1380                                    struct llogd_conn_body *body)
1381 {
1382         int rc;
1383         ENTRY;
1384
1385         OBD_CHECK_DT_OP(exp->exp_obd, llog_connect, 0);
1386         EXP_COUNTER_INCREMENT(exp, llog_connect);
1387
1388         rc = OBP(exp->exp_obd, llog_connect)(exp, body);
1389         RETURN(rc);
1390 }
1391
1392
1393 static inline int obd_notify(struct obd_device *obd,
1394                              struct obd_device *watched,
1395                              enum obd_notify_event ev,
1396                              void *data)
1397 {
1398         int rc;
1399         ENTRY;
1400         OBD_CHECK_DEV(obd);
1401
1402         /* the check for async_recov is a complete hack - I'm hereby
1403            overloading the meaning to also mean "this was called from
1404            mds_postsetup".  I know that my mds is able to handle notifies
1405            by this point, and it needs to get them to execute mds_postrecov. */
1406         if (!obd->obd_set_up && !obd->obd_async_recov) {
1407                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1408                 RETURN(-EINVAL);
1409         }
1410
1411         if (!OBP(obd, notify)) {
1412                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1413                 RETURN(-ENOSYS);
1414         }
1415
1416         OBD_COUNTER_INCREMENT(obd, notify);
1417         rc = OBP(obd, notify)(obd, watched, ev, data);
1418         RETURN(rc);
1419 }
1420
1421 static inline int obd_notify_observer(struct obd_device *observer,
1422                                       struct obd_device *observed,
1423                                       enum obd_notify_event ev,
1424                                       void *data)
1425 {
1426         int rc1;
1427         int rc2;
1428
1429         struct obd_notify_upcall *onu;
1430
1431         if (observer->obd_observer)
1432                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1433         else
1434                 rc1 = 0;
1435         /*
1436          * Also, call non-obd listener, if any
1437          */
1438         onu = &observer->obd_upcall;
1439         if (onu->onu_upcall != NULL)
1440                 rc2 = onu->onu_upcall(observer, observed, ev,
1441                                       onu->onu_owner, NULL);
1442         else
1443                 rc2 = 0;
1444
1445         return rc1 ? rc1 : rc2;
1446 }
1447
1448 static inline int obd_quotacheck(struct obd_export *exp,
1449                                  struct obd_quotactl *oqctl)
1450 {
1451         int rc;
1452         ENTRY;
1453
1454         EXP_CHECK_DT_OP(exp, quotacheck);
1455         EXP_COUNTER_INCREMENT(exp, quotacheck);
1456
1457         rc = OBP(exp->exp_obd, quotacheck)(exp->exp_obd, exp, oqctl);
1458         RETURN(rc);
1459 }
1460
1461 static inline int obd_quotactl(struct obd_export *exp,
1462                                struct obd_quotactl *oqctl)
1463 {
1464         int rc;
1465         ENTRY;
1466
1467         EXP_CHECK_DT_OP(exp, quotactl);
1468         EXP_COUNTER_INCREMENT(exp, quotactl);
1469
1470         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1471         RETURN(rc);
1472 }
1473
1474 static inline int obd_health_check(const struct lu_env *env,
1475                                    struct obd_device *obd)
1476 {
1477         /* returns: 0 on healthy
1478          *         >0 on unhealthy + reason code/flag
1479          *            however the only suppored reason == 1 right now
1480          *            We'll need to define some better reasons
1481          *            or flags in the future.
1482          *         <0 on error
1483          */
1484         int rc;
1485         ENTRY;
1486
1487         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1488         if (obd == NULL || !OBT(obd)) {
1489                 CERROR("cleaned up obd\n");
1490                 RETURN(-EOPNOTSUPP);
1491         }
1492         if (!obd->obd_set_up || obd->obd_stopping)
1493                 RETURN(0);
1494         if (!OBP(obd, health_check))
1495                 RETURN(0);
1496
1497         rc = OBP(obd, health_check)(env, obd);
1498         RETURN(rc);
1499 }
1500
1501 static inline int obd_register_observer(struct obd_device *obd,
1502                                         struct obd_device *observer)
1503 {
1504         ENTRY;
1505         OBD_CHECK_DEV(obd);
1506         down_write(&obd->obd_observer_link_sem);
1507         if (obd->obd_observer && observer) {
1508                 up_write(&obd->obd_observer_link_sem);
1509                 RETURN(-EALREADY);
1510         }
1511         obd->obd_observer = observer;
1512         up_write(&obd->obd_observer_link_sem);
1513         RETURN(0);
1514 }
1515
1516 static inline int obd_pin_observer(struct obd_device *obd,
1517                                    struct obd_device **observer)
1518 {
1519         ENTRY;
1520         down_read(&obd->obd_observer_link_sem);
1521         if (!obd->obd_observer) {
1522                 *observer = NULL;
1523                 up_read(&obd->obd_observer_link_sem);
1524                 RETURN(-ENOENT);
1525         }
1526         *observer = obd->obd_observer;
1527         RETURN(0);
1528 }
1529
1530 static inline int obd_unpin_observer(struct obd_device *obd)
1531 {
1532         ENTRY;
1533         up_read(&obd->obd_observer_link_sem);
1534         RETURN(0);
1535 }
1536
1537 #if 0
1538 static inline int obd_register_page_removal_cb(struct obd_export *exp,
1539                                                obd_page_removal_cb_t cb,
1540                                                obd_pin_extent_cb pin_cb)
1541 {
1542         int rc;
1543         ENTRY;
1544
1545         OBD_CHECK_DT_OP(exp->exp_obd, register_page_removal_cb, 0);
1546         OBD_COUNTER_INCREMENT(exp->exp_obd, register_page_removal_cb);
1547
1548         rc = OBP(exp->exp_obd, register_page_removal_cb)(exp, cb, pin_cb);
1549         RETURN(rc);
1550 }
1551
1552 static inline int obd_unregister_page_removal_cb(struct obd_export *exp,
1553                                                  obd_page_removal_cb_t cb)
1554 {
1555         int rc;
1556         ENTRY;
1557
1558         OBD_CHECK_DT_OP(exp->exp_obd, unregister_page_removal_cb, 0);
1559         OBD_COUNTER_INCREMENT(exp->exp_obd, unregister_page_removal_cb);
1560
1561         rc = OBP(exp->exp_obd, unregister_page_removal_cb)(exp, cb);
1562         RETURN(rc);
1563 }
1564
1565 static inline int obd_register_lock_cancel_cb(struct obd_export *exp,
1566                                               obd_lock_cancel_cb cb)
1567 {
1568         int rc;
1569         ENTRY;
1570
1571         OBD_CHECK_DT_OP(exp->exp_obd, register_lock_cancel_cb, 0);
1572         OBD_COUNTER_INCREMENT(exp->exp_obd, register_lock_cancel_cb);
1573
1574         rc = OBP(exp->exp_obd, register_lock_cancel_cb)(exp, cb);
1575         RETURN(rc);
1576 }
1577
1578 static inline int obd_unregister_lock_cancel_cb(struct obd_export *exp,
1579                                                  obd_lock_cancel_cb cb)
1580 {
1581         int rc;
1582         ENTRY;
1583
1584         OBD_CHECK_DT_OP(exp->exp_obd, unregister_lock_cancel_cb, 0);
1585         OBD_COUNTER_INCREMENT(exp->exp_obd, unregister_lock_cancel_cb);
1586
1587         rc = OBP(exp->exp_obd, unregister_lock_cancel_cb)(exp, cb);
1588         RETURN(rc);
1589 }
1590 #endif
1591
1592 /* metadata helpers */
1593 static inline int md_getstatus(struct obd_export *exp,
1594                                struct lu_fid *fid, struct obd_capa **pc)
1595 {
1596         int rc;
1597         ENTRY;
1598
1599         EXP_CHECK_MD_OP(exp, getstatus);
1600         EXP_MD_COUNTER_INCREMENT(exp, getstatus);
1601         rc = MDP(exp->exp_obd, getstatus)(exp, fid, pc);
1602         RETURN(rc);
1603 }
1604
1605 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1606                              struct ptlrpc_request **request)
1607 {
1608         int rc;
1609         ENTRY;
1610         EXP_CHECK_MD_OP(exp, getattr);
1611         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1612         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1613         RETURN(rc);
1614 }
1615
1616 static inline int md_null_inode(struct obd_export *exp,
1617                                    const struct lu_fid *fid)
1618 {
1619         int rc;
1620         ENTRY;
1621         EXP_CHECK_MD_OP(exp, null_inode);
1622         EXP_MD_COUNTER_INCREMENT(exp, null_inode);
1623         rc = MDP(exp->exp_obd, null_inode)(exp, fid);
1624         RETURN(rc);
1625 }
1626
1627 static inline int md_find_cbdata(struct obd_export *exp,
1628                                  const struct lu_fid *fid,
1629                                  ldlm_iterator_t it, void *data)
1630 {
1631         int rc;
1632         ENTRY;
1633         EXP_CHECK_MD_OP(exp, find_cbdata);
1634         EXP_MD_COUNTER_INCREMENT(exp, find_cbdata);
1635         rc = MDP(exp->exp_obd, find_cbdata)(exp, fid, it, data);
1636         RETURN(rc);
1637 }
1638
1639 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1640                            struct md_open_data *mod,
1641                            struct ptlrpc_request **request)
1642 {
1643         int rc;
1644         ENTRY;
1645         EXP_CHECK_MD_OP(exp, close);
1646         EXP_MD_COUNTER_INCREMENT(exp, close);
1647         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1648         RETURN(rc);
1649 }
1650
1651 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1652                             const void *data, int datalen, int mode, __u32 uid,
1653                             __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1654                             struct ptlrpc_request **request)
1655 {
1656         int rc;
1657         ENTRY;
1658         EXP_CHECK_MD_OP(exp, create);
1659         EXP_MD_COUNTER_INCREMENT(exp, create);
1660         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1661                                        uid, gid, cap_effective, rdev, request);
1662         RETURN(rc);
1663 }
1664
1665 static inline int md_done_writing(struct obd_export *exp,
1666                                   struct md_op_data *op_data,
1667                                   struct md_open_data *mod)
1668 {
1669         int rc;
1670         ENTRY;
1671         EXP_CHECK_MD_OP(exp, done_writing);
1672         EXP_MD_COUNTER_INCREMENT(exp, done_writing);
1673         rc = MDP(exp->exp_obd, done_writing)(exp, op_data, mod);
1674         RETURN(rc);
1675 }
1676
1677 static inline int md_enqueue(struct obd_export *exp,
1678                              struct ldlm_enqueue_info *einfo,
1679                              struct lookup_intent *it,
1680                              struct md_op_data *op_data,
1681                              struct lustre_handle *lockh,
1682                              void *lmm, int lmmsize,
1683                              struct ptlrpc_request **req,
1684                              __u64 extra_lock_flags)
1685 {
1686         int rc;
1687         ENTRY;
1688         EXP_CHECK_MD_OP(exp, enqueue);
1689         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1690         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, it, op_data, lockh,
1691                                         lmm, lmmsize, req, extra_lock_flags);
1692         RETURN(rc);
1693 }
1694
1695 static inline int md_getattr_name(struct obd_export *exp,
1696                                   struct md_op_data *op_data,
1697                                   struct ptlrpc_request **request)
1698 {
1699         int rc;
1700         ENTRY;
1701         EXP_CHECK_MD_OP(exp, getattr_name);
1702         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1703         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1704         RETURN(rc);
1705 }
1706
1707 static inline int md_intent_lock(struct obd_export *exp,
1708                                  struct md_op_data *op_data, void *lmm,
1709                                  int lmmsize, struct lookup_intent *it,
1710                                  int lookup_flags, struct ptlrpc_request **reqp,
1711                                  ldlm_blocking_callback cb_blocking,
1712                                  __u64 extra_lock_flags)
1713 {
1714         int rc;
1715         ENTRY;
1716         EXP_CHECK_MD_OP(exp, intent_lock);
1717         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1718         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, lmm, lmmsize,
1719                                             it, lookup_flags, reqp, cb_blocking,
1720                                             extra_lock_flags);
1721         RETURN(rc);
1722 }
1723
1724 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1725                           struct ptlrpc_request **request)
1726 {
1727         int rc;
1728         ENTRY;
1729         EXP_CHECK_MD_OP(exp, link);
1730         EXP_MD_COUNTER_INCREMENT(exp, link);
1731         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1732         RETURN(rc);
1733 }
1734
1735 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1736                             const char *old, int oldlen, const char *new,
1737                             int newlen, struct ptlrpc_request **request)
1738 {
1739         int rc;
1740         ENTRY;
1741         EXP_CHECK_MD_OP(exp, rename);
1742         EXP_MD_COUNTER_INCREMENT(exp, rename);
1743         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1744                                        newlen, request);
1745         RETURN(rc);
1746 }
1747
1748 static inline int md_is_subdir(struct obd_export *exp,
1749                                const struct lu_fid *pfid,
1750                                const struct lu_fid *cfid,
1751                                struct ptlrpc_request **request)
1752 {
1753         int rc;
1754         ENTRY;
1755         EXP_CHECK_MD_OP(exp, is_subdir);
1756         EXP_MD_COUNTER_INCREMENT(exp, is_subdir);
1757         rc = MDP(exp->exp_obd, is_subdir)(exp, pfid, cfid, request);
1758         RETURN(rc);
1759 }
1760
1761 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
1762                              void *ea, int ealen, void *ea2, int ea2len,
1763                              struct ptlrpc_request **request,
1764                              struct md_open_data **mod)
1765 {
1766         int rc;
1767         ENTRY;
1768         EXP_CHECK_MD_OP(exp, setattr);
1769         EXP_MD_COUNTER_INCREMENT(exp, setattr);
1770         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen,
1771                                         ea2, ea2len, request, mod);
1772         RETURN(rc);
1773 }
1774
1775 static inline int md_fsync(struct obd_export *exp, const struct lu_fid *fid,
1776                            struct obd_capa *oc, struct ptlrpc_request **request)
1777 {
1778         int rc;
1779         ENTRY;
1780         EXP_CHECK_MD_OP(exp, fsync);
1781         EXP_MD_COUNTER_INCREMENT(exp, fsync);
1782         rc = MDP(exp->exp_obd, fsync)(exp, fid, oc, request);
1783         RETURN(rc);
1784 }
1785
1786 static inline int md_readpage(struct obd_export *exp, struct md_op_data *opdata,
1787                               struct page **pages,
1788                               struct ptlrpc_request **request)
1789 {
1790         int rc;
1791         ENTRY;
1792         EXP_CHECK_MD_OP(exp, readpage);
1793         EXP_MD_COUNTER_INCREMENT(exp, readpage);
1794         rc = MDP(exp->exp_obd, readpage)(exp, opdata, pages, request);
1795         RETURN(rc);
1796 }
1797
1798 static inline int md_read_entry(struct obd_export *exp,
1799                                 struct md_op_data *op_data,
1800                                 struct md_callback *cb_op,
1801                                 struct lu_dirent **ld,
1802                                 struct page **ppage)
1803 {
1804         int rc;
1805         ENTRY;
1806         EXP_CHECK_MD_OP(exp, read_entry);
1807         EXP_MD_COUNTER_INCREMENT(exp, read_entry);
1808         rc = MDP(exp->exp_obd, read_entry)(exp, op_data, cb_op, ld, ppage);
1809         RETURN(rc);
1810 }
1811
1812 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
1813                             struct ptlrpc_request **request)
1814 {
1815         int rc;
1816         ENTRY;
1817         EXP_CHECK_MD_OP(exp, unlink);
1818         EXP_MD_COUNTER_INCREMENT(exp, unlink);
1819         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
1820         RETURN(rc);
1821 }
1822
1823 static inline int md_get_lustre_md(struct obd_export *exp,
1824                                    struct ptlrpc_request *req,
1825                                    struct obd_export *dt_exp,
1826                                    struct obd_export *md_exp,
1827                                    struct lustre_md *md)
1828 {
1829         ENTRY;
1830         EXP_CHECK_MD_OP(exp, get_lustre_md);
1831         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
1832         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
1833 }
1834
1835 static inline int md_free_lustre_md(struct obd_export *exp,
1836                                     struct lustre_md *md)
1837 {
1838         ENTRY;
1839         EXP_CHECK_MD_OP(exp, free_lustre_md);
1840         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
1841         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
1842 }
1843
1844 static inline int md_update_lsm_md(struct obd_export *exp,
1845                                    struct lmv_stripe_md *lsm,
1846                                    struct mdt_body *body,
1847                                    ldlm_blocking_callback cb)
1848 {
1849         ENTRY;
1850         EXP_CHECK_MD_OP(exp, update_lsm_md);
1851         EXP_MD_COUNTER_INCREMENT(exp, update_lsm_md);
1852         RETURN(MDP(exp->exp_obd, update_lsm_md)(exp, lsm, body, cb));
1853 }
1854
1855 static inline int md_merge_attr(struct obd_export *exp,
1856                                 const struct lmv_stripe_md *lsm,
1857                                 struct cl_attr *attr)
1858 {
1859         ENTRY;
1860         EXP_CHECK_MD_OP(exp, merge_attr);
1861         EXP_MD_COUNTER_INCREMENT(exp, merge_attr);
1862         RETURN(MDP(exp->exp_obd, merge_attr)(exp, lsm, attr));
1863 }
1864
1865 static inline int md_setxattr(struct obd_export *exp,
1866                               const struct lu_fid *fid, struct obd_capa *oc,
1867                               obd_valid valid, const char *name,
1868                               const char *input, int input_size,
1869                               int output_size, int flags, __u32 suppgid,
1870                               struct ptlrpc_request **request)
1871 {
1872         ENTRY;
1873         EXP_CHECK_MD_OP(exp, setxattr);
1874         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
1875         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, oc, valid, name, input,
1876                                            input_size, output_size, flags,
1877                                            suppgid, request));
1878 }
1879
1880 static inline int md_getxattr(struct obd_export *exp,
1881                               const struct lu_fid *fid, struct obd_capa *oc,
1882                               obd_valid valid, const char *name,
1883                               const char *input, int input_size,
1884                               int output_size, int flags,
1885                               struct ptlrpc_request **request)
1886 {
1887         ENTRY;
1888         EXP_CHECK_MD_OP(exp, getxattr);
1889         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
1890         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, oc, valid, name, input,
1891                                            input_size, output_size, flags,
1892                                            request));
1893 }
1894
1895 static inline int md_set_open_replay_data(struct obd_export *exp,
1896                                           struct obd_client_handle *och,
1897                                           struct lookup_intent *it)
1898 {
1899         ENTRY;
1900         EXP_CHECK_MD_OP(exp, set_open_replay_data);
1901         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
1902         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, it));
1903 }
1904
1905 static inline int md_clear_open_replay_data(struct obd_export *exp,
1906                                             struct obd_client_handle *och)
1907 {
1908         ENTRY;
1909         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
1910         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
1911         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
1912 }
1913
1914 static inline int md_set_lock_data(struct obd_export *exp,
1915                                    __u64 *lockh, void *data, __u64 *bits)
1916 {
1917         ENTRY;
1918         EXP_CHECK_MD_OP(exp, set_lock_data);
1919         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
1920         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
1921 }
1922
1923 static inline int md_cancel_unused(struct obd_export *exp,
1924                                    const struct lu_fid *fid,
1925                                    ldlm_policy_data_t *policy,
1926                                    ldlm_mode_t mode,
1927                                    ldlm_cancel_flags_t flags,
1928                                    void *opaque)
1929 {
1930         int rc;
1931         ENTRY;
1932
1933         EXP_CHECK_MD_OP(exp, cancel_unused);
1934         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
1935
1936         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
1937                                               flags, opaque);
1938         RETURN(rc);
1939 }
1940
1941 static inline ldlm_mode_t md_lock_match(struct obd_export *exp, __u64 flags,
1942                                         const struct lu_fid *fid,
1943                                         ldlm_type_t type,
1944                                         ldlm_policy_data_t *policy,
1945                                         ldlm_mode_t mode,
1946                                         struct lustre_handle *lockh)
1947 {
1948         ENTRY;
1949         EXP_CHECK_MD_OP(exp, lock_match);
1950         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
1951         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
1952                                              policy, mode, lockh));
1953 }
1954
1955 static inline int md_init_ea_size(struct obd_export *exp, int easize,
1956                                   int def_asize, int cookiesize,
1957                                   int def_cookiesize)
1958 {
1959         ENTRY;
1960         EXP_CHECK_MD_OP(exp, init_ea_size);
1961         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
1962         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, easize, def_asize,
1963                                                cookiesize, def_cookiesize));
1964 }
1965
1966 static inline int md_get_remote_perm(struct obd_export *exp,
1967                                      const struct lu_fid *fid,
1968                                      struct obd_capa *oc, __u32 suppgid,
1969                                      struct ptlrpc_request **request)
1970 {
1971         ENTRY;
1972         EXP_CHECK_MD_OP(exp, get_remote_perm);
1973         EXP_MD_COUNTER_INCREMENT(exp, get_remote_perm);
1974         RETURN(MDP(exp->exp_obd, get_remote_perm)(exp, fid, oc, suppgid,
1975                                                   request));
1976 }
1977
1978 static inline int md_renew_capa(struct obd_export *exp, struct obd_capa *ocapa,
1979                                 renew_capa_cb_t cb)
1980 {
1981         int rc;
1982         ENTRY;
1983         EXP_CHECK_MD_OP(exp, renew_capa);
1984         EXP_MD_COUNTER_INCREMENT(exp, renew_capa);
1985         rc = MDP(exp->exp_obd, renew_capa)(exp, ocapa, cb);
1986         RETURN(rc);
1987 }
1988
1989 static inline int md_unpack_capa(struct obd_export *exp,
1990                                  struct ptlrpc_request *req,
1991                                  const struct req_msg_field *field,
1992                                  struct obd_capa **oc)
1993 {
1994         int rc;
1995         ENTRY;
1996         EXP_CHECK_MD_OP(exp, unpack_capa);
1997         EXP_MD_COUNTER_INCREMENT(exp, unpack_capa);
1998         rc = MDP(exp->exp_obd, unpack_capa)(exp, req, field, oc);
1999         RETURN(rc);
2000 }
2001
2002 static inline int md_intent_getattr_async(struct obd_export *exp,
2003                                           struct md_enqueue_info *minfo,
2004                                           struct ldlm_enqueue_info *einfo)
2005 {
2006         int rc;
2007         ENTRY;
2008         EXP_CHECK_MD_OP(exp, intent_getattr_async);
2009         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
2010         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo, einfo);
2011         RETURN(rc);
2012 }
2013
2014 static inline int md_revalidate_lock(struct obd_export *exp,
2015                                      struct lookup_intent *it,
2016                                      struct lu_fid *fid, __u64 *bits)
2017 {
2018         int rc;
2019         ENTRY;
2020         EXP_CHECK_MD_OP(exp, revalidate_lock);
2021         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
2022         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
2023         RETURN(rc);
2024 }
2025
2026
2027 /* OBD Metadata Support */
2028
2029 extern int obd_init_caches(void);
2030 extern void obd_cleanup_caches(void);
2031
2032 /* support routines */
2033 extern struct kmem_cache *obdo_cachep;
2034
2035 #define OBDO_ALLOC(ptr)                                                       \
2036 do {                                                                          \
2037         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, GFP_NOFS);             \
2038 } while(0)
2039
2040 #define OBDO_FREE(ptr)                                                        \
2041 do {                                                                          \
2042         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
2043 } while(0)
2044
2045
2046 static inline void obdo2fid(struct obdo *oa, struct lu_fid *fid)
2047 {
2048         /* something here */
2049 }
2050
2051 static inline void fid2obdo(struct lu_fid *fid, struct obdo *oa)
2052 {
2053         /* something here */
2054 }
2055
2056 typedef int (*register_lwp_cb)(void *data);
2057
2058 struct lwp_register_item {
2059         struct obd_export **lri_exp;
2060         register_lwp_cb     lri_cb_func;
2061         void               *lri_cb_data;
2062         cfs_list_t          lri_list;
2063         char                lri_name[MTI_NAME_MAXLEN];
2064 };
2065
2066 /* I'm as embarrassed about this as you are.
2067  *
2068  * <shaver> // XXX do not look into _superhack with remaining eye
2069  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
2070 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
2071
2072 /* obd_mount.c */
2073 #ifdef HAVE_SERVER_SUPPORT
2074 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
2075                              register_lwp_cb cb_func, void *cb_data);
2076 void lustre_deregister_lwp_item(struct obd_export **exp);
2077 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx);
2078 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx);
2079 #endif /* HAVE_SERVER_SUPPORT */
2080
2081 /* sysctl.c */
2082 extern void obd_sysctl_init (void);
2083 extern void obd_sysctl_clean (void);
2084
2085 /* uuid.c  */
2086 typedef __u8 class_uuid_t[16];
2087 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
2088
2089 /* lustre_peer.c    */
2090 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
2091 int class_add_uuid(const char *uuid, __u64 nid);
2092 int class_del_uuid (const char *uuid);
2093 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
2094 void class_init_uuidlist(void);
2095 void class_exit_uuidlist(void);
2096
2097 /* prng.c */
2098 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
2099
2100 #ifdef __KERNEL__
2101 int server_name2index(const char *svname, __u32 *idx, const char **endptr);
2102 #else
2103 # define server_name2index(name, idx, ptr)      do {} while (0)
2104 #endif
2105
2106 #endif /* __LINUX_OBD_CLASS_H */