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 __u16 obd_get_max_mod_rpcs_in_flight(struct client_obd *cli);
 121 int obd_set_max_mod_rpcs_in_flight(struct client_obd *cli, __u16 max);
 122
 123 struct llog_handle;
 124 struct llog_rec_hdr;
 125 typedef int (*llog_cb_t)(const struct lu_env *, struct llog_handle *,
 126                          struct llog_rec_hdr *, void *);
 127 /* obd_config.c */
 128 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
 129                                      const char *new_name);
 130 int class_process_config(struct lustre_cfg *lcfg);
 131 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 132                              struct lustre_cfg *lcfg, void *data);
 133 int class_attach(struct lustre_cfg *lcfg);
 134 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
 135 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg);
 136 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg);
 137 struct obd_device *class_incref(struct obd_device *obd,
 138                                 const char *scope, const void *source);
 139 void class_decref(struct obd_device *obd,
 140                   const char *scope, const void *source);
 141 void dump_exports(struct obd_device *obd, int locks);
 142 int class_config_llog_handler(const struct lu_env *env,
 143                               struct llog_handle *handle,
 144                               struct llog_rec_hdr *rec, void *data);
 145 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg);
 146 int class_add_uuid(const char *uuid, __u64 nid);
 147
 148 #define CFG_F_START     0x01   /* Set when we start updating from a log */
 149 #define CFG_F_MARKER    0x02   /* We are within a maker */
 150 #define CFG_F_SKIP      0x04   /* We should ignore this cfg command */
 151 #define CFG_F_COMPAT146 0x08   /* Allow old-style logs */
 152 #define CFG_F_EXCLUDE   0x10   /* OST exclusion list */
 153
 154 /* Passed as data param to class_config_parse_llog */
 155 struct config_llog_instance {
 156         char                    *cfg_obdname;
 157         void                    *cfg_instance;
 158         struct super_block      *cfg_sb;
 159         struct obd_uuid          cfg_uuid;
 160         llog_cb_t                cfg_callback;
 161         int                      cfg_last_idx; /* for partial llog processing */
 162         int                      cfg_flags;
 163         __u32                    cfg_lwp_idx;
 164 };
 165 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 166                             char *name, struct config_llog_instance *cfg);
 167 int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 168                            char *name, struct config_llog_instance *cfg);
 169
 170 enum {
 171         CONFIG_T_CONFIG  = 0,
 172         CONFIG_T_SPTLRPC = 1,
 173         CONFIG_T_RECOVER = 2,
 174         CONFIG_T_PARAMS  = 3,
 175         CONFIG_T_MAX     = 4
 176 };
 177
 178 #define PARAMS_FILENAME "params"
 179 #define LCTL_UPCALL     "lctl"
 180
 181 /* list of active configuration logs  */
 182 struct config_llog_data {
 183         struct ldlm_res_id          cld_resid;
 184         struct config_llog_instance cld_cfg;
 185         struct list_head            cld_list_chain;
 186         atomic_t                    cld_refcount;
 187         struct config_llog_data    *cld_sptlrpc;/* depended sptlrpc log */
 188         struct config_llog_data    *cld_params; /* common parameters log */
 189         struct config_llog_data    *cld_recover;/* imperative recover log */
 190         struct obd_export          *cld_mgcexp;
 191         struct mutex                cld_lock;
 192         int                         cld_type;
 193         unsigned int                cld_stopping:1, /* we were told to stop
 194                                                      * watching */
 195                                     cld_lostlock:1; /* lock not requeued */
 196         char                        cld_logname[0];
 197 };
 198
 199 struct lustre_profile {
 200         struct list_head         lp_list;
 201         char                    *lp_profile;
 202         char                    *lp_dt;
 203         char                    *lp_md;
 204 };
 205
 206 struct lustre_profile *class_get_profile(const char * prof);
 207 void class_del_profile(const char *prof);
 208 void class_del_profiles(void);
 209
 210 #if LUSTRE_TRACKS_LOCK_EXP_REFS
 211
 212 void __class_export_add_lock_ref(struct obd_export *, struct ldlm_lock *);
 213 void __class_export_del_lock_ref(struct obd_export *, struct ldlm_lock *);
 214 extern void (*class_export_dump_hook)(struct obd_export *);
 215
 216 #else
 217
 218 #define __class_export_add_lock_ref(exp, lock)             do {} while(0)
 219 #define __class_export_del_lock_ref(exp, lock)             do {} while(0)
 220
 221 #endif
 222
 223 #define class_export_rpc_inc(exp)                                       \
 224 ({                                                                      \
 225         atomic_inc(&(exp)->exp_rpc_count);                              \
 226         CDEBUG(D_INFO, "RPC GETting export %p : new rpc_count %d\n",    \
 227                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 228 })
 229
 230 #define class_export_rpc_dec(exp)                                       \
 231 ({                                                                      \
 232         LASSERT_ATOMIC_POS(&exp->exp_rpc_count);                        \
 233         atomic_dec(&(exp)->exp_rpc_count);                              \
 234         CDEBUG(D_INFO, "RPC PUTting export %p : new rpc_count %d\n",    \
 235                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 236 })
 237
 238 #define class_export_lock_get(exp, lock)                                \
 239 ({                                                                      \
 240         atomic_inc(&(exp)->exp_locks_count);                            \
 241         __class_export_add_lock_ref(exp, lock);                         \
 242         CDEBUG(D_INFO, "lock GETting export %p : new locks_count %d\n", \
 243                (exp), atomic_read(&(exp)->exp_locks_count));            \
 244         class_export_get(exp);                                          \
 245 })
 246
 247 #define class_export_lock_put(exp, lock)                                \
 248 ({                                                                      \
 249         LASSERT_ATOMIC_POS(&exp->exp_locks_count);                      \
 250         atomic_dec(&(exp)->exp_locks_count);                            \
 251         __class_export_del_lock_ref(exp, lock);                         \
 252         CDEBUG(D_INFO, "lock PUTting export %p : new locks_count %d\n", \
 253                (exp), atomic_read(&(exp)->exp_locks_count));            \
 254         class_export_put(exp);                                          \
 255 })
 256
 257 #define class_export_cb_get(exp)                                        \
 258 ({                                                                      \
 259         atomic_inc(&(exp)->exp_cb_count);                               \
 260         CDEBUG(D_INFO, "callback GETting export %p : new cb_count %d\n",\
 261                (exp), atomic_read(&(exp)->exp_cb_count));               \
 262         class_export_get(exp);                                          \
 263 })
 264
 265 #define class_export_cb_put(exp)                                        \
 266 ({                                                                      \
 267         LASSERT_ATOMIC_POS(&exp->exp_cb_count);                         \
 268         atomic_dec(&(exp)->exp_cb_count);                               \
 269         CDEBUG(D_INFO, "callback PUTting export %p : new cb_count %d\n",\
 270                (exp), atomic_read(&(exp)->exp_cb_count));               \
 271         class_export_put(exp);                                          \
 272 })
 273
 274 /* genops.c */
 275 struct obd_export *class_export_get(struct obd_export *exp);
 276 void class_export_put(struct obd_export *exp);
 277 struct obd_export *class_new_export(struct obd_device *obddev,
 278                                     struct obd_uuid *cluuid);
 279 void class_unlink_export(struct obd_export *exp);
 280
 281 struct obd_import *class_import_get(struct obd_import *);
 282 void class_import_put(struct obd_import *);
 283 struct obd_import *class_new_import(struct obd_device *obd);
 284 void class_destroy_import(struct obd_import *exp);
 285
 286 struct obd_type *class_search_type(const char *name);
 287 struct obd_type *class_get_type(const char *name);
 288 void class_put_type(struct obd_type *type);
 289 int class_connect(struct lustre_handle *conn, struct obd_device *obd,
 290                   struct obd_uuid *cluuid);
 291 int class_disconnect(struct obd_export *exp);
 292 void class_fail_export(struct obd_export *exp);
 293 int class_connected_export(struct obd_export *exp);
 294 void class_disconnect_exports(struct obd_device *obddev);
 295 int class_manual_cleanup(struct obd_device *obd);
 296 void class_disconnect_stale_exports(struct obd_device *,
 297                                     int (*test_export)(struct obd_export *));
 298 static inline enum obd_option exp_flags_from_obd(struct obd_device *obd)
 299 {
 300         return ((obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 301                 (obd->obd_force ? OBD_OPT_FORCE : 0) |
 302                 (obd->obd_abort_recovery ? OBD_OPT_ABORT_RECOV : 0) |
 303                 0);
 304 }
 305
 306 #ifdef HAVE_SERVER_SUPPORT
 307 static inline struct lu_target *class_exp2tgt(struct obd_export *exp)
 308 {
 309         LASSERT(exp->exp_obd);
 310         if (exp->exp_obd->u.obt.obt_magic != OBT_MAGIC)
 311                 return NULL;
 312         return exp->exp_obd->u.obt.obt_lut;
 313 }
 314
 315 static inline struct lr_server_data *class_server_data(struct obd_device *obd)
 316 {
 317         LASSERT(obd->u.obt.obt_lut);
 318         return &obd->u.obt.obt_lut->lut_lsd;
 319 }
 320 #endif
 321
 322 /* obdo.c */
 323 struct lu_attr;
 324 struct inode;
 325
 326 void obdo_from_la(struct obdo *dst, const struct lu_attr *la, u64 valid);
 327 void la_from_obdo(struct lu_attr *la, const struct obdo *dst, u64 valid);
 328
 329 void obdo_cpy_md(struct obdo *dst, const struct obdo *src, u64 valid);
 330 void obdo_to_ioobj(const struct obdo *oa, struct obd_ioobj *ioobj);
 331
 332 #define OBT(dev)        (dev)->obd_type
 333 #define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 334 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
 335 #define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
 336
 337 /* Ensure obd_setup: used for cleanup which must be called
 338    while obd is stopping */
 339 #define OBD_CHECK_DEV(obd)                                      \
 340 do {                                                            \
 341         if (!(obd)) {                                           \
 342                 CERROR("NULL device\n");                        \
 343                 RETURN(-ENODEV);                                \
 344         }                                                       \
 345 } while (0)
 346
 347 /* ensure obd_setup and !obd_stopping */
 348 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 349 do {                                                            \
 350         OBD_CHECK_DEV(obd);                                     \
 351         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 352                 CERROR("Device %d not setup\n",                 \
 353                        (obd)->obd_minor);                       \
 354                 RETURN(-ENODEV);                                \
 355         }                                                       \
 356 } while (0)
 357
 358
 359 #ifdef CONFIG_PROC_FS
 360 #define OBD_COUNTER_OFFSET(op)                                                 \
 361         ((offsetof(struct obd_ops, o_ ## op) -                                 \
 362           offsetof(struct obd_ops, o_iocontrol))                               \
 363          / sizeof(((struct obd_ops *)NULL)->o_iocontrol))
 364
 365 /* The '- 1' below is for o_owner. */
 366 #define NUM_OBD_STATS                                                          \
 367         (sizeof(struct obd_ops) /                                              \
 368          sizeof(((struct obd_ops *)NULL)->o_iocontrol) - 1)
 369
 370 #define OBD_COUNTER_INCREMENT(obd, op)                                         \
 371         lprocfs_counter_incr((obd)->obd_stats,                                 \
 372                              (obd)->obd_cntr_base + OBD_COUNTER_OFFSET(op))
 373
 374 #define EXP_COUNTER_INCREMENT(exp, op)                                         \
 375         do {                                                                   \
 376                 unsigned int _off;                                             \
 377                 _off = (exp)->exp_obd->obd_cntr_base + OBD_COUNTER_OFFSET(op); \
 378                 lprocfs_counter_incr((exp)->exp_obd->obd_stats, _off);         \
 379                 if ((exp)->exp_obd->obd_uses_nid_stats &&                      \
 380                     (exp)->exp_nid_stats != NULL)                              \
 381                         lprocfs_counter_incr((exp)->exp_nid_stats->nid_stats,  \
 382                                              _off);                            \
 383         } while (0)
 384
 385 #define _MD_COUNTER_OFFSET(m_op)                                               \
 386         ((offsetof(struct md_ops, m_op) -                                      \
 387           offsetof(struct md_ops, MD_STATS_FIRST_OP)) /                        \
 388          sizeof(((struct md_ops *)NULL)->MD_STATS_FIRST_OP))
 389
 390 #define MD_COUNTER_OFFSET(op) _MD_COUNTER_OFFSET(m_ ## op)
 391
 392 #define NUM_MD_STATS                                                           \
 393         (_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) -                                \
 394          _MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) + 1)
 395
 396 /* Note that we only increment md counters for ops whose offset is less
 397  * than NUM_MD_STATS. This is explained in a comment in the definition
 398  * of struct md_ops. */
 399 #define EXP_MD_COUNTER_INCREMENT(exp, op)                                      \
 400         do {                                                                   \
 401                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS)                      \
 402                         lprocfs_counter_incr((exp)->exp_obd->obd_md_stats,     \
 403                                         (exp)->exp_obd->obd_md_cntr_base +     \
 404                                         MD_COUNTER_OFFSET(op));                \
 405         } while (0)
 406
 407 #else
 408 #define OBD_COUNTER_OFFSET(op)
 409 #define OBD_COUNTER_INCREMENT(obd, op)
 410 #define EXP_COUNTER_INCREMENT(exp, op)
 411 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 412 #endif
 413
 414 static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
 415 {
 416         /* Always add in ldlm_stats */
 417         tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC
 418                                                   ,LPROCFS_STATS_FLAG_NOPERCPU);
 419         if (tmp->nid_ldlm_stats == NULL)
 420                 return -ENOMEM;
 421
 422         lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
 423
 424         return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
 425                                       tmp->nid_ldlm_stats);
 426 }
 427
 428 #define EXP_CHECK_MD_OP(exp, op)                                \
 429 do {                                                            \
 430         if ((exp) == NULL) {                                    \
 431                 CERROR("obd_" #op ": NULL export\n");           \
 432                 RETURN(-ENODEV);                                \
 433         }                                                       \
 434         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 435                 CERROR("obd_" #op ": cleaned up obd\n");        \
 436                 RETURN(-EOPNOTSUPP);                            \
 437         }                                                       \
 438         if (!OBT((exp)->exp_obd) || !MDP((exp)->exp_obd, op)) { \
 439                 CERROR("obd_" #op ": dev %s/%d no operation\n", \
 440                        (exp)->exp_obd->obd_name,                \
 441                        (exp)->exp_obd->obd_minor);              \
 442                 RETURN(-EOPNOTSUPP);                            \
 443         }                                                       \
 444 } while (0)
 445
 446
 447 #define OBD_CHECK_DT_OP(obd, op, err)                           \
 448 do {                                                            \
 449         if (!OBT(obd) || !OBP((obd), op)) {                     \
 450                 if (err)                                        \
 451                         CERROR("obd_" #op ": dev %d no operation\n",    \
 452                                obd->obd_minor);                 \
 453                 RETURN(err);                                    \
 454         }                                                       \
 455 } while (0)
 456
 457 #define EXP_CHECK_DT_OP(exp, op)                                \
 458 do {                                                            \
 459         if ((exp) == NULL) {                                    \
 460                 CERROR("obd_" #op ": NULL export\n");           \
 461                 RETURN(-ENODEV);                                \
 462         }                                                       \
 463         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 464                 CERROR("obd_" #op ": cleaned up obd\n");        \
 465                 RETURN(-EOPNOTSUPP);                            \
 466         }                                                       \
 467         if (!OBT((exp)->exp_obd) || !OBP((exp)->exp_obd, op)) { \
 468                 CERROR("obd_" #op ": dev %d no operation\n",    \
 469                        (exp)->exp_obd->obd_minor);              \
 470                 RETURN(-EOPNOTSUPP);                            \
 471         }                                                       \
 472 } while (0)
 473
 474 #define CTXT_CHECK_OP(ctxt, op, err)                                 \
 475 do {                                                                 \
 476         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {             \
 477                 if (err)                                             \
 478                         CERROR("lop_" #op ": dev %d no operation\n", \
 479                                ctxt->loc_obd->obd_minor);            \
 480                 RETURN(err);                                         \
 481         }                                                            \
 482 } while (0)
 483
 484 static inline int class_devno_max(void)
 485 {
 486         return MAX_OBD_DEVICES;
 487 }
 488
 489 static inline int obd_get_info(const struct lu_env *env, struct obd_export *exp,
 490                                __u32 keylen, void *key,
 491                                __u32 *vallen, void *val)
 492 {
 493         int rc;
 494         ENTRY;
 495
 496         EXP_CHECK_DT_OP(exp, get_info);
 497         EXP_COUNTER_INCREMENT(exp, get_info);
 498
 499         rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val);
 500         RETURN(rc);
 501 }
 502
 503 static inline int obd_set_info_async(const struct lu_env *env,
 504                                      struct obd_export *exp,
 505                                      __u32 keylen, void *key,
 506                                      __u32 vallen, void *val,
 507                                      struct ptlrpc_request_set *set)
 508 {
 509         int rc;
 510         ENTRY;
 511
 512         EXP_CHECK_DT_OP(exp, set_info_async);
 513         EXP_COUNTER_INCREMENT(exp, set_info_async);
 514
 515         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 516                                                val, set);
 517         RETURN(rc);
 518 }
 519
 520 /*
 521  * obd-lu integration.
 522  *
 523  * Functionality is being moved into new lu_device-based layering, but some
 524  * pieces of configuration process are still based on obd devices.
 525  *
 526  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 527  * subsume ->o_setup() methods of obd devices they replace. The same for
 528  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 529  * result, obd_setup() and obd_process_config() branch and call one XOR
 530  * another.
 531  *
 532  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 533  * lu_device_type_operations::ldto_device_free() fully implement the
 534  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 535  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 536  */
 537
 538 #define DECLARE_LU_VARS(ldt, d)                 \
 539         struct lu_device_type *ldt;       \
 540         struct lu_device *d
 541
 542 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 543 {
 544         int rc;
 545         DECLARE_LU_VARS(ldt, d);
 546         ENTRY;
 547
 548         ldt = obd->obd_type->typ_lu;
 549         if (ldt != NULL) {
 550                 struct lu_context  session_ctx;
 551                 struct lu_env env;
 552                 lu_context_init(&session_ctx, LCT_SESSION | LCT_SERVER_SESSION);
 553                 session_ctx.lc_thread = NULL;
 554                 lu_context_enter(&session_ctx);
 555
 556                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 557                 if (rc == 0) {
 558                         env.le_ses = &session_ctx;
 559                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 560                         lu_env_fini(&env);
 561                         if (!IS_ERR(d)) {
 562                                 obd->obd_lu_dev = d;
 563                                 d->ld_obd = obd;
 564                                 rc = 0;
 565                         } else
 566                                 rc = PTR_ERR(d);
 567                 }
 568                 lu_context_exit(&session_ctx);
 569                 lu_context_fini(&session_ctx);
 570
 571         } else {
 572                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
 573                 OBD_COUNTER_INCREMENT(obd, setup);
 574                 rc = OBP(obd, setup)(obd, cfg);
 575         }
 576         RETURN(rc);
 577 }
 578
 579 static inline int obd_precleanup(struct obd_device *obd,
 580                                  enum obd_cleanup_stage cleanup_stage)
 581 {
 582         int rc;
 583         DECLARE_LU_VARS(ldt, d);
 584         ENTRY;
 585
 586         OBD_CHECK_DEV(obd);
 587         ldt = obd->obd_type->typ_lu;
 588         d = obd->obd_lu_dev;
 589         if (ldt != NULL && d != NULL) {
 590                 if (cleanup_stage == OBD_CLEANUP_EXPORTS) {
 591                         struct lu_env env;
 592
 593                         rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 594                         if (rc == 0) {
 595                                 ldt->ldt_ops->ldto_device_fini(&env, d);
 596                                 lu_env_fini(&env);
 597                         }
 598                 }
 599         }
 600         OBD_CHECK_DT_OP(obd, precleanup, 0);
 601         OBD_COUNTER_INCREMENT(obd, precleanup);
 602
 603         rc = OBP(obd, precleanup)(obd, cleanup_stage);
 604         RETURN(rc);
 605 }
 606
 607 static inline int obd_cleanup(struct obd_device *obd)
 608 {
 609         int rc;
 610         DECLARE_LU_VARS(ldt, d);
 611         ENTRY;
 612
 613         OBD_CHECK_DEV(obd);
 614
 615         ldt = obd->obd_type->typ_lu;
 616         d = obd->obd_lu_dev;
 617         if (ldt != NULL && d != NULL) {
 618                 struct lu_env env;
 619
 620                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 621                 if (rc == 0) {
 622                         ldt->ldt_ops->ldto_device_free(&env, d);
 623                         lu_env_fini(&env);
 624                         obd->obd_lu_dev = NULL;
 625                 }
 626         }
 627         OBD_CHECK_DT_OP(obd, cleanup, 0);
 628         OBD_COUNTER_INCREMENT(obd, cleanup);
 629
 630         rc = OBP(obd, cleanup)(obd);
 631         RETURN(rc);
 632 }
 633
 634 static inline void obd_cleanup_client_import(struct obd_device *obd)
 635 {
 636         ENTRY;
 637
 638         /* If we set up but never connected, the
 639            client import will not have been cleaned. */
 640         down_write(&obd->u.cli.cl_sem);
 641         if (obd->u.cli.cl_import) {
 642                 struct obd_import *imp;
 643                 imp = obd->u.cli.cl_import;
 644                 CDEBUG(D_CONFIG, "%s: client import never connected\n",
 645                        obd->obd_name);
 646                 ptlrpc_invalidate_import(imp);
 647                 if (imp->imp_rq_pool) {
 648                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
 649                         imp->imp_rq_pool = NULL;
 650                 }
 651                 client_destroy_import(imp);
 652                 obd->u.cli.cl_import = NULL;
 653         }
 654         up_write(&obd->u.cli.cl_sem);
 655
 656         EXIT;
 657 }
 658
 659 static inline int
 660 obd_process_config(struct obd_device *obd, int datalen, void *data)
 661 {
 662         int rc;
 663         DECLARE_LU_VARS(ldt, d);
 664         ENTRY;
 665
 666         OBD_CHECK_DEV(obd);
 667
 668         obd->obd_process_conf = 1;
 669         ldt = obd->obd_type->typ_lu;
 670         d = obd->obd_lu_dev;
 671         if (ldt != NULL && d != NULL) {
 672                 struct lu_env env;
 673
 674                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 675                 if (rc == 0) {
 676                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 677                         lu_env_fini(&env);
 678                 }
 679         } else {
 680                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
 681                 rc = OBP(obd, process_config)(obd, datalen, data);
 682         }
 683         OBD_COUNTER_INCREMENT(obd, process_config);
 684         obd->obd_process_conf = 0;
 685
 686         RETURN(rc);
 687 }
 688
 689 /* Unpack an MD struct from disk to in-memory format.
 690  * Returns +ve size of unpacked MD (0 for free), or -ve error.
 691  *
 692  * If @mem_tgt == NULL, MD size is returned (max size if @disk_src == NULL).
 693  * If @*mem_tgt != NULL and @disk_src == NULL, @*mem_tgt will be freed.
 694  * If @*mem_tgt == NULL, it will be allocated
 695  */
 696 static inline int obd_unpackmd(struct obd_export *exp,
 697                                struct lov_stripe_md **mem_tgt,
 698                                struct lov_mds_md *disk_src,
 699                                int disk_len)
 700 {
 701         int rc;
 702         ENTRY;
 703
 704         EXP_CHECK_DT_OP(exp, unpackmd);
 705         EXP_COUNTER_INCREMENT(exp, unpackmd);
 706
 707         rc = OBP(exp->exp_obd, unpackmd)(exp, mem_tgt, disk_src, disk_len);
 708         RETURN(rc);
 709 }
 710
 711 static inline int obd_free_memmd(struct obd_export *exp,
 712                                  struct lov_stripe_md **mem_tgt)
 713 {
 714         int rc;
 715
 716         LASSERT(mem_tgt);
 717         LASSERT(*mem_tgt);
 718         rc = obd_unpackmd(exp, mem_tgt, NULL, 0);
 719         *mem_tgt = NULL;
 720         return rc;
 721 }
 722
 723 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 724                              struct obdo *obdo)
 725 {
 726         int rc;
 727         ENTRY;
 728
 729         EXP_CHECK_DT_OP(exp, create);
 730         EXP_COUNTER_INCREMENT(exp, create);
 731
 732         rc = OBP(exp->exp_obd, create)(env, exp, obdo);
 733         RETURN(rc);
 734 }
 735
 736 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 737                               struct obdo *obdo)
 738 {
 739         int rc;
 740         ENTRY;
 741
 742         EXP_CHECK_DT_OP(exp, destroy);
 743         EXP_COUNTER_INCREMENT(exp, destroy);
 744
 745         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo);
 746         RETURN(rc);
 747 }
 748
 749 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 750                               struct obdo *oa)
 751 {
 752         int rc;
 753
 754         ENTRY;
 755         EXP_CHECK_DT_OP(exp, getattr);
 756         EXP_COUNTER_INCREMENT(exp, getattr);
 757         rc = OBP(exp->exp_obd, getattr)(env, exp, oa);
 758
 759         RETURN(rc);
 760 }
 761
 762 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 763                               struct obdo *oa)
 764 {
 765         int rc;
 766
 767         ENTRY;
 768         EXP_CHECK_DT_OP(exp, setattr);
 769         EXP_COUNTER_INCREMENT(exp, setattr);
 770         rc = OBP(exp->exp_obd, setattr)(env, exp, oa);
 771
 772         RETURN(rc);
 773 }
 774
 775 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 776                                int priority)
 777 {
 778         struct obd_device *obd = imp->imp_obd;
 779         int rc;
 780         ENTRY;
 781
 782         OBD_CHECK_DEV_ACTIVE(obd);
 783         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 784         OBD_COUNTER_INCREMENT(obd, add_conn);
 785
 786         rc = OBP(obd, add_conn)(imp, uuid, priority);
 787         RETURN(rc);
 788 }
 789
 790 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 791 {
 792         struct obd_device *obd = imp->imp_obd;
 793         int rc;
 794         ENTRY;
 795
 796         OBD_CHECK_DEV_ACTIVE(obd);
 797         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 798         OBD_COUNTER_INCREMENT(obd, del_conn);
 799
 800         rc = OBP(obd, del_conn)(imp, uuid);
 801         RETURN(rc);
 802 }
 803
 804 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 805 {
 806         struct obd_uuid *uuid;
 807         ENTRY;
 808
 809         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 810         EXP_COUNTER_INCREMENT(exp, get_uuid);
 811
 812         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 813         RETURN(uuid);
 814 }
 815
 816 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 817  * @param exp New export handle
 818  * @param d Connect data, supported flags are set, flags also understood
 819  *    by obd are returned.
 820  */
 821 static inline int obd_connect(const struct lu_env *env,
 822                               struct obd_export **exp,struct obd_device *obd,
 823                               struct obd_uuid *cluuid,
 824                               struct obd_connect_data *data,
 825                               void *localdata)
 826 {
 827         int rc;
 828         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 829                                                    * check */
 830         ENTRY;
 831
 832         OBD_CHECK_DEV_ACTIVE(obd);
 833         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
 834         OBD_COUNTER_INCREMENT(obd, connect);
 835
 836         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 837         /* check that only subset is granted */
 838         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
 839                                     data->ocd_connect_flags));
 840         RETURN(rc);
 841 }
 842
 843 static inline int obd_reconnect(const struct lu_env *env,
 844                                 struct obd_export *exp,
 845                                 struct obd_device *obd,
 846                                 struct obd_uuid *cluuid,
 847                                 struct obd_connect_data *d,
 848                                 void *localdata)
 849 {
 850         int rc;
 851         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
 852                                                    * check */
 853
 854         ENTRY;
 855
 856         OBD_CHECK_DEV_ACTIVE(obd);
 857         OBD_CHECK_DT_OP(obd, reconnect, 0);
 858         OBD_COUNTER_INCREMENT(obd, reconnect);
 859
 860         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 861         /* check that only subset is granted */
 862         LASSERT(ergo(d != NULL,
 863                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 864         RETURN(rc);
 865 }
 866
 867 static inline int obd_disconnect(struct obd_export *exp)
 868 {
 869         int rc;
 870         ENTRY;
 871
 872         EXP_CHECK_DT_OP(exp, disconnect);
 873         EXP_COUNTER_INCREMENT(exp, disconnect);
 874
 875         rc = OBP(exp->exp_obd, disconnect)(exp);
 876         RETURN(rc);
 877 }
 878
 879 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
 880                                enum lu_cli_type type)
 881 {
 882         int rc;
 883         ENTRY;
 884
 885         OBD_CHECK_DT_OP(obd, fid_init, 0);
 886         OBD_COUNTER_INCREMENT(obd, fid_init);
 887
 888         rc = OBP(obd, fid_init)(obd, exp, type);
 889         RETURN(rc);
 890 }
 891
 892 static inline int obd_fid_fini(struct obd_device *obd)
 893 {
 894         int rc;
 895         ENTRY;
 896
 897         OBD_CHECK_DT_OP(obd, fid_fini, 0);
 898         OBD_COUNTER_INCREMENT(obd, fid_fini);
 899
 900         rc = OBP(obd, fid_fini)(obd);
 901         RETURN(rc);
 902 }
 903
 904 static inline int obd_fid_alloc(const struct lu_env *env,
 905                                 struct obd_export *exp,
 906                                 struct lu_fid *fid,
 907                                 struct md_op_data *op_data)
 908 {
 909         int rc;
 910         ENTRY;
 911
 912         EXP_CHECK_DT_OP(exp, fid_alloc);
 913         EXP_COUNTER_INCREMENT(exp, fid_alloc);
 914
 915         rc = OBP(exp->exp_obd, fid_alloc)(env, exp, fid, op_data);
 916         RETURN(rc);
 917 }
 918
 919 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
 920 {
 921         int rc;
 922         ENTRY;
 923
 924         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
 925         EXP_COUNTER_INCREMENT(exp, ping);
 926
 927         rc = OBP(exp->exp_obd, ping)(env, exp);
 928         RETURN(rc);
 929 }
 930
 931 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
 932 {
 933         int rc;
 934         ENTRY;
 935
 936         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
 937         OBD_COUNTER_INCREMENT(obd, pool_new);
 938
 939         rc = OBP(obd, pool_new)(obd, poolname);
 940         RETURN(rc);
 941 }
 942
 943 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
 944 {
 945         int rc;
 946         ENTRY;
 947
 948         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
 949         OBD_COUNTER_INCREMENT(obd, pool_del);
 950
 951         rc = OBP(obd, pool_del)(obd, poolname);
 952         RETURN(rc);
 953 }
 954
 955 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
 956 {
 957         int rc;
 958         ENTRY;
 959
 960         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
 961         OBD_COUNTER_INCREMENT(obd, pool_add);
 962
 963         rc = OBP(obd, pool_add)(obd, poolname, ostname);
 964         RETURN(rc);
 965 }
 966
 967 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
 968 {
 969         int rc;
 970         ENTRY;
 971
 972         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
 973         OBD_COUNTER_INCREMENT(obd, pool_rem);
 974
 975         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
 976         RETURN(rc);
 977 }
 978
 979 static inline void obd_getref(struct obd_device *obd)
 980 {
 981         ENTRY;
 982         if (OBT(obd) && OBP(obd, getref)) {
 983                 OBD_COUNTER_INCREMENT(obd, getref);
 984                 OBP(obd, getref)(obd);
 985         }
 986         EXIT;
 987 }
 988
 989 static inline void obd_putref(struct obd_device *obd)
 990 {
 991         ENTRY;
 992         if (OBT(obd) && OBP(obd, putref)) {
 993                 OBD_COUNTER_INCREMENT(obd, putref);
 994                 OBP(obd, putref)(obd);
 995         }
 996         EXIT;
 997 }
 998
 999 static inline int obd_init_export(struct obd_export *exp)
1000 {
1001         int rc = 0;
1002
1003         ENTRY;
1004         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1005             OBP((exp)->exp_obd, init_export))
1006                 rc = OBP(exp->exp_obd, init_export)(exp);
1007         RETURN(rc);
1008 }
1009
1010 static inline int obd_destroy_export(struct obd_export *exp)
1011 {
1012         ENTRY;
1013         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1014             OBP((exp)->exp_obd, destroy_export))
1015                 OBP(exp->exp_obd, destroy_export)(exp);
1016         RETURN(0);
1017 }
1018
1019 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1020  * If the cache is older than @max_age we will get a new value from the
1021  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1022 static inline int obd_statfs_async(struct obd_export *exp,
1023                                    struct obd_info *oinfo,
1024                                    __u64 max_age,
1025                                    struct ptlrpc_request_set *rqset)
1026 {
1027         int rc = 0;
1028         struct obd_device *obd;
1029         ENTRY;
1030
1031         if (exp == NULL || exp->exp_obd == NULL)
1032                 RETURN(-EINVAL);
1033
1034         obd = exp->exp_obd;
1035         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1036         OBD_COUNTER_INCREMENT(obd, statfs);
1037
1038         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
1039                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1040         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1041                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1042         } else {
1043                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
1044                        " objects "LPU64"/"LPU64"\n",
1045                        obd->obd_name, &obd->obd_osfs,
1046                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1047                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1048                 spin_lock(&obd->obd_osfs_lock);
1049                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1050                 spin_unlock(&obd->obd_osfs_lock);
1051                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1052                 if (oinfo->oi_cb_up)
1053                         oinfo->oi_cb_up(oinfo, 0);
1054         }
1055         RETURN(rc);
1056 }
1057
1058 static inline int obd_statfs_rqset(struct obd_export *exp,
1059                                    struct obd_statfs *osfs, __u64 max_age,
1060                                    __u32 flags)
1061 {
1062         struct ptlrpc_request_set *set = NULL;
1063         struct obd_info oinfo = {
1064                 .oi_osfs = osfs,
1065                 .oi_flags = flags,
1066         };
1067         int rc = 0;
1068
1069         ENTRY;
1070
1071         set = ptlrpc_prep_set();
1072         if (set == NULL)
1073                 RETURN(-ENOMEM);
1074
1075         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1076         if (rc == 0)
1077                 rc = ptlrpc_set_wait(set);
1078
1079         ptlrpc_set_destroy(set);
1080
1081         RETURN(rc);
1082 }
1083
1084 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1085  * If the cache is older than @max_age we will get a new value from the
1086  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1087 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1088                              struct obd_statfs *osfs, __u64 max_age,
1089                              __u32 flags)
1090 {
1091         int rc = 0;
1092         struct obd_device *obd = exp->exp_obd;
1093         ENTRY;
1094
1095         if (obd == NULL)
1096                 RETURN(-EINVAL);
1097
1098         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1099         OBD_COUNTER_INCREMENT(obd, statfs);
1100
1101         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
1102                obd->obd_osfs_age, max_age);
1103         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1104                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1105                 if (rc == 0) {
1106                         spin_lock(&obd->obd_osfs_lock);
1107                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1108                         obd->obd_osfs_age = cfs_time_current_64();
1109                         spin_unlock(&obd->obd_osfs_lock);
1110                 }
1111         } else {
1112                 CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
1113                        " objects "LPU64"/"LPU64"\n",
1114                        obd->obd_name, &obd->obd_osfs,
1115                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1116                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1117                 spin_lock(&obd->obd_osfs_lock);
1118                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1119                 spin_unlock(&obd->obd_osfs_lock);
1120         }
1121         RETURN(rc);
1122 }
1123
1124 static inline int obd_preprw(const struct lu_env *env, int cmd,
1125                              struct obd_export *exp, struct obdo *oa,
1126                              int objcount, struct obd_ioobj *obj,
1127                              struct niobuf_remote *remote, int *pages,
1128                              struct niobuf_local *local)
1129 {
1130         int rc;
1131
1132         ENTRY;
1133         EXP_CHECK_DT_OP(exp, preprw);
1134         EXP_COUNTER_INCREMENT(exp, preprw);
1135         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1136                                        pages, local);
1137
1138         RETURN(rc);
1139 }
1140
1141 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1142                                struct obd_export *exp, struct obdo *oa,
1143                                int objcount, struct obd_ioobj *obj,
1144                                struct niobuf_remote *rnb, int pages,
1145                                struct niobuf_local *local, int rc)
1146 {
1147         ENTRY;
1148
1149         EXP_CHECK_DT_OP(exp, commitrw);
1150         EXP_COUNTER_INCREMENT(exp, commitrw);
1151         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1152                                          rnb, pages, local, rc);
1153
1154         RETURN(rc);
1155 }
1156
1157 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1158                                 int len, void *karg, void __user *uarg)
1159 {
1160         int rc;
1161         ENTRY;
1162
1163         EXP_CHECK_DT_OP(exp, iocontrol);
1164         EXP_COUNTER_INCREMENT(exp, iocontrol);
1165
1166         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1167         RETURN(rc);
1168 }
1169
1170 static inline void obd_import_event(struct obd_device *obd,
1171                                     struct obd_import *imp,
1172                                     enum obd_import_event event)
1173 {
1174         ENTRY;
1175         if (!obd) {
1176                 CERROR("NULL device\n");
1177                 EXIT;
1178                 return;
1179         }
1180         if (obd->obd_set_up && OBP(obd, import_event)) {
1181                 OBD_COUNTER_INCREMENT(obd, import_event);
1182                 OBP(obd, import_event)(obd, imp, event);
1183         }
1184         EXIT;
1185 }
1186
1187 static inline int obd_notify(struct obd_device *obd,
1188                              struct obd_device *watched,
1189                              enum obd_notify_event ev,
1190                              void *data)
1191 {
1192         int rc;
1193         ENTRY;
1194         OBD_CHECK_DEV(obd);
1195
1196         if (!obd->obd_set_up) {
1197                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1198                 RETURN(-EINVAL);
1199         }
1200
1201         if (!OBP(obd, notify)) {
1202                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1203                 RETURN(-ENOSYS);
1204         }
1205
1206         OBD_COUNTER_INCREMENT(obd, notify);
1207         rc = OBP(obd, notify)(obd, watched, ev, data);
1208         RETURN(rc);
1209 }
1210
1211 static inline int obd_notify_observer(struct obd_device *observer,
1212                                       struct obd_device *observed,
1213                                       enum obd_notify_event ev,
1214                                       void *data)
1215 {
1216         int rc1;
1217         int rc2;
1218
1219         struct obd_notify_upcall *onu;
1220
1221         if (observer->obd_observer)
1222                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1223         else
1224                 rc1 = 0;
1225         /*
1226          * Also, call non-obd listener, if any
1227          */
1228         onu = &observer->obd_upcall;
1229         if (onu->onu_upcall != NULL)
1230                 rc2 = onu->onu_upcall(observer, observed, ev,
1231                                       onu->onu_owner, NULL);
1232         else
1233                 rc2 = 0;
1234
1235         return rc1 ? rc1 : rc2;
1236 }
1237
1238 static inline int obd_quotactl(struct obd_export *exp,
1239                                struct obd_quotactl *oqctl)
1240 {
1241         int rc;
1242         ENTRY;
1243
1244         EXP_CHECK_DT_OP(exp, quotactl);
1245         EXP_COUNTER_INCREMENT(exp, quotactl);
1246
1247         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1248         RETURN(rc);
1249 }
1250
1251 static inline int obd_health_check(const struct lu_env *env,
1252                                    struct obd_device *obd)
1253 {
1254         /* returns: 0 on healthy
1255          *         >0 on unhealthy + reason code/flag
1256          *            however the only suppored reason == 1 right now
1257          *            We'll need to define some better reasons
1258          *            or flags in the future.
1259          *         <0 on error
1260          */
1261         int rc;
1262         ENTRY;
1263
1264         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1265         if (obd == NULL || !OBT(obd)) {
1266                 CERROR("cleaned up obd\n");
1267                 RETURN(-EOPNOTSUPP);
1268         }
1269         if (!obd->obd_set_up || obd->obd_stopping)
1270                 RETURN(0);
1271         if (!OBP(obd, health_check))
1272                 RETURN(0);
1273
1274         rc = OBP(obd, health_check)(env, obd);
1275         RETURN(rc);
1276 }
1277
1278 static inline int obd_register_observer(struct obd_device *obd,
1279                                         struct obd_device *observer)
1280 {
1281         ENTRY;
1282         OBD_CHECK_DEV(obd);
1283         down_write(&obd->obd_observer_link_sem);
1284         if (obd->obd_observer && observer) {
1285                 up_write(&obd->obd_observer_link_sem);
1286                 RETURN(-EALREADY);
1287         }
1288         obd->obd_observer = observer;
1289         up_write(&obd->obd_observer_link_sem);
1290         RETURN(0);
1291 }
1292
1293 /* metadata helpers */
1294 static inline int md_getstatus(struct obd_export *exp, struct lu_fid *fid)
1295 {
1296         int rc;
1297
1298         ENTRY;
1299         EXP_CHECK_MD_OP(exp, getstatus);
1300         EXP_MD_COUNTER_INCREMENT(exp, getstatus);
1301         rc = MDP(exp->exp_obd, getstatus)(exp, fid);
1302
1303         RETURN(rc);
1304 }
1305
1306 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1307                              struct ptlrpc_request **request)
1308 {
1309         int rc;
1310         ENTRY;
1311         EXP_CHECK_MD_OP(exp, getattr);
1312         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1313         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1314         RETURN(rc);
1315 }
1316
1317 static inline int md_null_inode(struct obd_export *exp,
1318                                    const struct lu_fid *fid)
1319 {
1320         int rc;
1321         ENTRY;
1322         EXP_CHECK_MD_OP(exp, null_inode);
1323         EXP_MD_COUNTER_INCREMENT(exp, null_inode);
1324         rc = MDP(exp->exp_obd, null_inode)(exp, fid);
1325         RETURN(rc);
1326 }
1327
1328 static inline int md_find_cbdata(struct obd_export *exp,
1329                                  const struct lu_fid *fid,
1330                                  ldlm_iterator_t it, void *data)
1331 {
1332         int rc;
1333         ENTRY;
1334         EXP_CHECK_MD_OP(exp, find_cbdata);
1335         EXP_MD_COUNTER_INCREMENT(exp, find_cbdata);
1336         rc = MDP(exp->exp_obd, find_cbdata)(exp, fid, it, data);
1337         RETURN(rc);
1338 }
1339
1340 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1341                            struct md_open_data *mod,
1342                            struct ptlrpc_request **request)
1343 {
1344         int rc;
1345         ENTRY;
1346         EXP_CHECK_MD_OP(exp, close);
1347         EXP_MD_COUNTER_INCREMENT(exp, close);
1348         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1349         RETURN(rc);
1350 }
1351
1352 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1353                             const void *data, size_t datalen, umode_t mode,
1354                             uid_t uid, gid_t gid, cfs_cap_t cap_effective,
1355                             __u64 rdev, struct ptlrpc_request **request)
1356 {
1357         int rc;
1358         ENTRY;
1359         EXP_CHECK_MD_OP(exp, create);
1360         EXP_MD_COUNTER_INCREMENT(exp, create);
1361         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1362                                        uid, gid, cap_effective, rdev, request);
1363         RETURN(rc);
1364 }
1365
1366 static inline int md_enqueue(struct obd_export *exp,
1367                              struct ldlm_enqueue_info *einfo,
1368                              const union ldlm_policy_data *policy,
1369                              struct lookup_intent *it,
1370                              struct md_op_data *op_data,
1371                              struct lustre_handle *lockh,
1372                              __u64 extra_lock_flags)
1373 {
1374         int rc;
1375         ENTRY;
1376         EXP_CHECK_MD_OP(exp, enqueue);
1377         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1378         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, policy, it, op_data, lockh,
1379                                         extra_lock_flags);
1380         RETURN(rc);
1381 }
1382
1383 static inline int md_getattr_name(struct obd_export *exp,
1384                                   struct md_op_data *op_data,
1385                                   struct ptlrpc_request **request)
1386 {
1387         int rc;
1388         ENTRY;
1389         EXP_CHECK_MD_OP(exp, getattr_name);
1390         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1391         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1392         RETURN(rc);
1393 }
1394
1395 static inline int md_intent_lock(struct obd_export *exp,
1396                                  struct md_op_data *op_data,
1397                                  struct lookup_intent *it,
1398                                  struct ptlrpc_request **reqp,
1399                                  ldlm_blocking_callback cb_blocking,
1400                                  __u64 extra_lock_flags)
1401 {
1402         int rc;
1403         ENTRY;
1404         EXP_CHECK_MD_OP(exp, intent_lock);
1405         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1406         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, it, reqp, cb_blocking,
1407                                             extra_lock_flags);
1408         RETURN(rc);
1409 }
1410
1411 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1412                           struct ptlrpc_request **request)
1413 {
1414         int rc;
1415         ENTRY;
1416         EXP_CHECK_MD_OP(exp, link);
1417         EXP_MD_COUNTER_INCREMENT(exp, link);
1418         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1419         RETURN(rc);
1420 }
1421
1422 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1423                             const char *old, size_t oldlen, const char *new,
1424                             size_t newlen, struct ptlrpc_request **request)
1425 {
1426         int rc;
1427         ENTRY;
1428         EXP_CHECK_MD_OP(exp, rename);
1429         EXP_MD_COUNTER_INCREMENT(exp, rename);
1430         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1431                                        newlen, request);
1432         RETURN(rc);
1433 }
1434
1435 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
1436                              void *ea, size_t ealen,
1437                              struct ptlrpc_request **request)
1438 {
1439         int rc;
1440         ENTRY;
1441         EXP_CHECK_MD_OP(exp, setattr);
1442         EXP_MD_COUNTER_INCREMENT(exp, setattr);
1443         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen, request);
1444         RETURN(rc);
1445 }
1446
1447 static inline int md_fsync(struct obd_export *exp, const struct lu_fid *fid,
1448                            struct ptlrpc_request **request)
1449 {
1450         int rc;
1451
1452         ENTRY;
1453         EXP_CHECK_MD_OP(exp, fsync);
1454         EXP_MD_COUNTER_INCREMENT(exp, fsync);
1455         rc = MDP(exp->exp_obd, fsync)(exp, fid, request);
1456
1457         RETURN(rc);
1458 }
1459
1460 static inline int md_read_page(struct obd_export *exp,
1461                                struct md_op_data *op_data,
1462                                struct md_callback *cb_op,
1463                                __u64  hash_offset,
1464                                struct page **ppage)
1465 {
1466         int rc;
1467         ENTRY;
1468         EXP_CHECK_MD_OP(exp, read_page);
1469         EXP_MD_COUNTER_INCREMENT(exp, read_page);
1470         rc = MDP(exp->exp_obd, read_page)(exp, op_data, cb_op, hash_offset,
1471                                           ppage);
1472         RETURN(rc);
1473 }
1474
1475 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
1476                             struct ptlrpc_request **request)
1477 {
1478         int rc;
1479         ENTRY;
1480         EXP_CHECK_MD_OP(exp, unlink);
1481         EXP_MD_COUNTER_INCREMENT(exp, unlink);
1482         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
1483         RETURN(rc);
1484 }
1485
1486 static inline int md_get_lustre_md(struct obd_export *exp,
1487                                    struct ptlrpc_request *req,
1488                                    struct obd_export *dt_exp,
1489                                    struct obd_export *md_exp,
1490                                    struct lustre_md *md)
1491 {
1492         ENTRY;
1493         EXP_CHECK_MD_OP(exp, get_lustre_md);
1494         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
1495         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
1496 }
1497
1498 static inline int md_free_lustre_md(struct obd_export *exp,
1499                                     struct lustre_md *md)
1500 {
1501         ENTRY;
1502         EXP_CHECK_MD_OP(exp, free_lustre_md);
1503         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
1504         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
1505 }
1506
1507 static inline int md_merge_attr(struct obd_export *exp,
1508                                 const struct lmv_stripe_md *lsm,
1509                                 struct cl_attr *attr,
1510                                 ldlm_blocking_callback cb)
1511 {
1512         ENTRY;
1513         EXP_CHECK_MD_OP(exp, merge_attr);
1514         EXP_MD_COUNTER_INCREMENT(exp, merge_attr);
1515         RETURN(MDP(exp->exp_obd, merge_attr)(exp, lsm, attr, cb));
1516 }
1517
1518 static inline int md_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1519                               u64 valid, const char *name,
1520                               const char *input, int input_size,
1521                               int output_size, int flags, __u32 suppgid,
1522                               struct ptlrpc_request **request)
1523 {
1524         ENTRY;
1525         EXP_CHECK_MD_OP(exp, setxattr);
1526         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
1527         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, valid, name, input,
1528                                            input_size, output_size, flags,
1529                                            suppgid, request));
1530 }
1531
1532 static inline int md_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1533                               u64 valid, const char *name,
1534                               const char *input, int input_size,
1535                               int output_size, int flags,
1536                               struct ptlrpc_request **request)
1537 {
1538         ENTRY;
1539         EXP_CHECK_MD_OP(exp, getxattr);
1540         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
1541         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, valid, name, input,
1542                                            input_size, output_size, flags,
1543                                            request));
1544 }
1545
1546 static inline int md_set_open_replay_data(struct obd_export *exp,
1547                                           struct obd_client_handle *och,
1548                                           struct lookup_intent *it)
1549 {
1550         ENTRY;
1551         EXP_CHECK_MD_OP(exp, set_open_replay_data);
1552         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
1553         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, it));
1554 }
1555
1556 static inline int md_clear_open_replay_data(struct obd_export *exp,
1557                                             struct obd_client_handle *och)
1558 {
1559         ENTRY;
1560         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
1561         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
1562         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
1563 }
1564
1565 static inline int md_set_lock_data(struct obd_export *exp,
1566                                    __u64 *lockh, void *data, __u64 *bits)
1567 {
1568         ENTRY;
1569         EXP_CHECK_MD_OP(exp, set_lock_data);
1570         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
1571         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
1572 }
1573
1574 static inline int md_cancel_unused(struct obd_export *exp,
1575                                    const struct lu_fid *fid,
1576                                    ldlm_policy_data_t *policy,
1577                                    ldlm_mode_t mode,
1578                                    ldlm_cancel_flags_t flags,
1579                                    void *opaque)
1580 {
1581         int rc;
1582         ENTRY;
1583
1584         EXP_CHECK_MD_OP(exp, cancel_unused);
1585         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
1586
1587         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
1588                                               flags, opaque);
1589         RETURN(rc);
1590 }
1591
1592 static inline ldlm_mode_t md_lock_match(struct obd_export *exp, __u64 flags,
1593                                         const struct lu_fid *fid,
1594                                         ldlm_type_t type,
1595                                         ldlm_policy_data_t *policy,
1596                                         ldlm_mode_t mode,
1597                                         struct lustre_handle *lockh)
1598 {
1599         ENTRY;
1600         EXP_CHECK_MD_OP(exp, lock_match);
1601         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
1602         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
1603                                              policy, mode, lockh));
1604 }
1605
1606 static inline int md_init_ea_size(struct obd_export *exp, __u32 ea_size,
1607                                   __u32 def_ea_size)
1608 {
1609         ENTRY;
1610         EXP_CHECK_MD_OP(exp, init_ea_size);
1611         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
1612         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, ea_size, def_ea_size));
1613 }
1614
1615 static inline int md_get_remote_perm(struct obd_export *exp,
1616                                      const struct lu_fid *fid, u32 suppgid,
1617                                      struct ptlrpc_request **request)
1618 {
1619         ENTRY;
1620         EXP_CHECK_MD_OP(exp, get_remote_perm);
1621         EXP_MD_COUNTER_INCREMENT(exp, get_remote_perm);
1622
1623         RETURN(MDP(exp->exp_obd, get_remote_perm)(exp, fid, suppgid, request));
1624 }
1625
1626 static inline int md_intent_getattr_async(struct obd_export *exp,
1627                                           struct md_enqueue_info *minfo,
1628                                           struct ldlm_enqueue_info *einfo)
1629 {
1630         int rc;
1631         ENTRY;
1632         EXP_CHECK_MD_OP(exp, intent_getattr_async);
1633         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
1634         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo, einfo);
1635         RETURN(rc);
1636 }
1637
1638 static inline int md_revalidate_lock(struct obd_export *exp,
1639                                      struct lookup_intent *it,
1640                                      struct lu_fid *fid, __u64 *bits)
1641 {
1642         int rc;
1643         ENTRY;
1644         EXP_CHECK_MD_OP(exp, revalidate_lock);
1645         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
1646         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
1647         RETURN(rc);
1648 }
1649
1650 static inline int md_get_fid_from_lsm(struct obd_export *exp,
1651                                       const struct lmv_stripe_md *lsm,
1652                                       const char *name, int namelen,
1653                                       struct lu_fid *fid)
1654 {
1655         int rc;
1656         ENTRY;
1657         EXP_CHECK_MD_OP(exp, get_fid_from_lsm);
1658         EXP_MD_COUNTER_INCREMENT(exp, get_fid_from_lsm);
1659         rc = MDP(exp->exp_obd, get_fid_from_lsm)(exp, lsm, name, namelen, fid);
1660         RETURN(rc);
1661 }
1662
1663 /* OBD Metadata Support */
1664
1665 extern int obd_init_caches(void);
1666 extern void obd_cleanup_caches(void);
1667
1668 /* support routines */
1669 extern struct kmem_cache *obdo_cachep;
1670
1671 #define OBDO_ALLOC(ptr)                                                       \
1672 do {                                                                          \
1673         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, GFP_NOFS);             \
1674 } while(0)
1675
1676 #define OBDO_FREE(ptr)                                                        \
1677 do {                                                                          \
1678         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1679 } while(0)
1680
1681
1682 typedef int (*register_lwp_cb)(void *data);
1683
1684 struct lwp_register_item {
1685         struct obd_export **lri_exp;
1686         register_lwp_cb     lri_cb_func;
1687         void               *lri_cb_data;
1688         struct list_head            lri_list;
1689         char                lri_name[MTI_NAME_MAXLEN];
1690 };
1691
1692 /* I'm as embarrassed about this as you are.
1693  *
1694  * <shaver> // XXX do not look into _superhack with remaining eye
1695  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1696 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1697
1698 /* obd_mount.c */
1699 #ifdef HAVE_SERVER_SUPPORT
1700 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
1701                              register_lwp_cb cb_func, void *cb_data);
1702 void lustre_deregister_lwp_item(struct obd_export **exp);
1703 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx);
1704 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx);
1705 #endif /* HAVE_SERVER_SUPPORT */
1706 int lustre_register_fs(void);
1707 int lustre_unregister_fs(void);
1708 int lustre_check_exclusion(struct super_block *sb, char *svname);
1709
1710 /* sysctl.c */
1711 extern void obd_sysctl_init (void);
1712 extern void obd_sysctl_clean (void);
1713
1714 /* uuid.c  */
1715 typedef __u8 class_uuid_t[16];
1716 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
1717
1718 /* lustre_peer.c    */
1719 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
1720 int class_add_uuid(const char *uuid, __u64 nid);
1721 int class_del_uuid (const char *uuid);
1722 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
1723 void class_init_uuidlist(void);
1724 void class_exit_uuidlist(void);
1725
1726 /* prng.c */
1727 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
1728
1729 /* statfs_pack.c */
1730 struct kstatfs;
1731 void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
1732 void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);
1733
1734 /* root squash info */
1735 struct rw_semaphore;
1736 struct root_squash_info {
1737         uid_t                   rsi_uid;
1738         gid_t                   rsi_gid;
1739         struct list_head        rsi_nosquash_nids;
1740         struct rw_semaphore     rsi_sem;
1741 };
1742
1743 int server_name2index(const char *svname, __u32 *idx, const char **endptr);
1744
1745 /* linux-module.c */
1746 extern struct miscdevice obd_psdev;
1747 int class_procfs_init(void);
1748 int class_procfs_clean(void);
1749
1750 #endif /* __LINUX_OBD_CLASS_H */