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