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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32 #ifndef __CLASS_OBD_H
  33 #define __CLASS_OBD_H
  34
  35
  36 #include <obd_support.h>
  37 #include <lustre_import.h>
  38 #include <lustre_net.h>
  39 #include <obd.h>
  40 #include <lustre_lib.h>
  41 #include <uapi/linux/lustre/lustre_idl.h>
  42 #include <lprocfs_status.h>
  43
  44 #define OBD_STATFS_NODELAY      0x0001  /* requests should be send without delay
  45                                          * and resends for avoid deadlocks */
  46 #define OBD_STATFS_FROM_CACHE   0x0002  /* the statfs callback should not update
  47                                          * obd_osfs_age */
  48 #define OBD_STATFS_FOR_MDT0     0x0004  /* The statfs is only for retrieving
  49                                          * information from MDT0. */
  50
  51 extern rwlock_t obd_dev_lock;
  52
  53 /* OBD Operations Declarations */
  54 extern struct obd_device *class_conn2obd(struct lustre_handle *);
  55 extern struct obd_device *class_exp2obd(struct obd_export *);
  56 extern int class_handle_ioctl(unsigned int cmd, unsigned long arg);
  57 int lustre_get_jobid(char *jobid);
  58 void lustre_jobid_clear(const char *jobid);
  59 void jobid_cache_fini(void);
  60 int jobid_cache_init(void);
  61
  62 struct lu_device_type;
  63
  64 /* genops.c */
  65 struct obd_export *class_conn2export(struct lustre_handle *);
  66 int class_register_type(struct obd_ops *, struct md_ops *, bool enable_proc,
  67                         struct lprocfs_vars *module_vars,
  68                         const char *nm, struct lu_device_type *ldt);
  69 int class_unregister_type(const char *nm);
  70
  71 struct obd_device *class_newdev(const char *type_name, const char *name,
  72                                 const char *uuid);
  73 int class_register_device(struct obd_device *obd);
  74 void class_unregister_device(struct obd_device *obd);
  75 void class_free_dev(struct obd_device *obd);
  76
  77 struct obd_device *class_dev_by_str(const char *str);
  78 int class_name2dev(const char *name);
  79 struct obd_device *class_name2obd(const char *name);
  80 int class_uuid2dev(struct obd_uuid *uuid);
  81 struct obd_device *class_uuid2obd(struct obd_uuid *uuid);
  82 void class_obd_list(void);
  83 struct obd_device * class_find_client_obd(struct obd_uuid *tgt_uuid,
  84                                           const char * typ_name,
  85                                           struct obd_uuid *grp_uuid);
  86 struct obd_device * class_devices_in_group(struct obd_uuid *grp_uuid,
  87                                            int *next);
  88 struct obd_device * class_num2obd(int num);
  89 int get_devices_count(void);
  90
  91 int class_notify_sptlrpc_conf(const char *fsname, int namelen);
  92
  93 char *obd_export_nid2str(struct obd_export *exp);
  94
  95 int obd_export_evict_by_nid(struct obd_device *obd, const char *nid);
  96 int obd_export_evict_by_uuid(struct obd_device *obd, const char *uuid);
  97 int obd_connect_flags2str(char *page, int count, __u64 flags, __u64 flags2,
  98                           const char *sep);
  99
 100 int obd_zombie_impexp_init(void);
 101 void obd_zombie_impexp_stop(void);
 102 void obd_zombie_impexp_cull(void);
 103 void obd_zombie_barrier(void);
 104 void obd_exports_barrier(struct obd_device *obd);
 105 int kuc_len(int payload_len);
 106 struct kuc_hdr * kuc_ptr(void *p);
 107 void *kuc_alloc(int payload_len, int transport, int type);
 108 void kuc_free(void *p, int payload_len);
 109 int obd_get_request_slot(struct client_obd *cli);
 110 void obd_put_request_slot(struct client_obd *cli);
 111 __u32 obd_get_max_rpcs_in_flight(struct client_obd *cli);
 112 int obd_set_max_rpcs_in_flight(struct client_obd *cli, __u32 max);
 113 __u16 obd_get_max_mod_rpcs_in_flight(struct client_obd *cli);
 114 int obd_set_max_mod_rpcs_in_flight(struct client_obd *cli, __u16 max);
 115 int obd_mod_rpc_stats_seq_show(struct client_obd *cli, struct seq_file *seq);
 116
 117 __u16 obd_get_mod_rpc_slot(struct client_obd *cli, __u32 opc,
 118                            struct lookup_intent *it);
 119 void obd_put_mod_rpc_slot(struct client_obd *cli, __u32 opc,
 120                           struct lookup_intent *it, __u16 tag);
 121
 122 struct llog_handle;
 123 struct llog_rec_hdr;
 124 typedef int (*llog_cb_t)(const struct lu_env *, struct llog_handle *,
 125                          struct llog_rec_hdr *, void *);
 126
 127 struct obd_export *obd_stale_export_get(void);
 128 void obd_stale_export_put(struct obd_export *exp);
 129 void obd_stale_export_adjust(struct obd_export *exp);
 130
 131 /* obd_config.c */
 132 /* For interoperability */
 133 struct cfg_interop_param {
 134         char *old_param;
 135         char *new_param;
 136 };
 137
 138 char *lustre_cfg_string(struct lustre_cfg *lcfg, u32 index);
 139 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
 140                                      const char *new_name);
 141 int class_process_config(struct lustre_cfg *lcfg);
 142 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 143                              struct lustre_cfg *lcfg, void *data);
 144 int class_attach(struct lustre_cfg *lcfg);
 145 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
 146 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg);
 147 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg);
 148
 149 int class_find_param(char *buf, char *key, char **valp);
 150 struct cfg_interop_param *class_find_old_param(const char *param,
 151                                                struct cfg_interop_param *ptr);
 152 int class_get_next_param(char **params, char *copy);
 153 int class_match_param(char *buf, const char *key, char **valp);
 154 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh);
 155 int class_parse_nid_quiet(char *buf, lnet_nid_t *nid, char **endh);
 156 int class_parse_net(char *buf, u32 *net, char **endh);
 157 int class_match_nid(char *buf, char *key, lnet_nid_t nid);
 158 int class_match_net(char *buf, char *key, u32 net);
 159
 160 struct obd_device *class_incref(struct obd_device *obd,
 161                                 const char *scope, const void *source);
 162 void class_decref(struct obd_device *obd,
 163                   const char *scope, const void *source);
 164 void dump_exports(struct obd_device *obd, int locks, int debug_level);
 165 int class_config_llog_handler(const struct lu_env *env,
 166                               struct llog_handle *handle,
 167                               struct llog_rec_hdr *rec, void *data);
 168 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg);
 169
 170 #define CFG_F_START     0x01   /* Set when we start updating from a log */
 171 #define CFG_F_MARKER    0x02   /* We are within a maker */
 172 #define CFG_F_SKIP      0x04   /* We should ignore this cfg command */
 173 #define CFG_F_COMPAT146 0x08   /* Allow old-style logs */
 174 #define CFG_F_EXCLUDE   0x10   /* OST exclusion list */
 175
 176 /* Passed as data param to class_config_parse_llog */
 177 struct config_llog_instance {
 178         char                    *cfg_obdname;
 179         void                    *cfg_instance;
 180         struct super_block      *cfg_sb;
 181         struct obd_uuid          cfg_uuid;
 182         llog_cb_t                cfg_callback;
 183         int                      cfg_last_idx; /* for partial llog processing */
 184         int                      cfg_flags;
 185         __u32                    cfg_lwp_idx;
 186         __u32                    cfg_sub_clds;
 187 };
 188 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 189                             char *name, struct config_llog_instance *cfg);
 190
 191 #define CONFIG_SUB_SPTLRPC      0x01
 192 #define CONFIG_SUB_RECOVER      0x02
 193 #define CONFIG_SUB_PARAMS       0x04
 194 #define CONFIG_SUB_NODEMAP      0x08
 195 #define CONFIG_SUB_BARRIER      0x10
 196
 197 /* Sub clds should be attached to the config_llog_data when processing
 198  * config log for client or server target. */
 199 #define CONFIG_SUB_CLIENT       (CONFIG_SUB_SPTLRPC | CONFIG_SUB_RECOVER | \
 200                                  CONFIG_SUB_PARAMS)
 201 #define CONFIG_SUB_SERVER       (CONFIG_SUB_CLIENT | CONFIG_SUB_NODEMAP | \
 202                                  CONFIG_SUB_BARRIER)
 203
 204 #define PARAMS_FILENAME         "params"
 205 #define BARRIER_FILENAME        "barrier"
 206 #define LCTL_UPCALL             "lctl"
 207
 208 static inline bool logname_is_barrier(const char *logname)
 209 {
 210         char *ptr;
 211
 212         /* logname for barrier is "fsname-barrier" */
 213         ptr = strstr(logname, BARRIER_FILENAME);
 214         if (ptr && (ptr - logname) >= 2 &&
 215             *(ptr - 1) == '-' && *(ptr + 7) == '\0')
 216                 return true;
 217
 218         return false;
 219 }
 220
 221 /* list of active configuration logs  */
 222 struct config_llog_data {
 223         struct ldlm_res_id          cld_resid;
 224         struct config_llog_instance cld_cfg;
 225         struct list_head            cld_list_chain;
 226         atomic_t                    cld_refcount;
 227         struct config_llog_data    *cld_sptlrpc;/* depended sptlrpc log */
 228         struct config_llog_data    *cld_params; /* common parameters log */
 229         struct config_llog_data    *cld_recover;/* imperative recover log */
 230         struct config_llog_data    *cld_nodemap;/* nodemap log */
 231         struct config_llog_data    *cld_barrier;/* barrier log (for MDT only) */
 232         struct obd_export          *cld_mgcexp;
 233         struct mutex                cld_lock;
 234         int                         cld_type;
 235         unsigned int                cld_stopping:1, /* we were told to stop
 236                                                      * watching */
 237                                     cld_lostlock:1; /* lock not requeued */
 238         char                        cld_logname[0];
 239 };
 240
 241 struct lustre_profile {
 242         struct list_head         lp_list;
 243         char                    *lp_profile;
 244         char                    *lp_dt;
 245         char                    *lp_md;
 246         int                      lp_refs;
 247         bool                     lp_list_deleted;
 248 };
 249
 250 struct lustre_profile *class_get_profile(const char * prof);
 251 void class_del_profile(const char *prof);
 252 void class_put_profile(struct lustre_profile *lprof);
 253 void class_del_profiles(void);
 254
 255
 256 #if LUSTRE_TRACKS_LOCK_EXP_REFS
 257
 258 void __class_export_add_lock_ref(struct obd_export *, struct ldlm_lock *);
 259 void __class_export_del_lock_ref(struct obd_export *, struct ldlm_lock *);
 260 extern void (*class_export_dump_hook)(struct obd_export *);
 261
 262 #else
 263
 264 #define __class_export_add_lock_ref(exp, lock)             do {} while(0)
 265 #define __class_export_del_lock_ref(exp, lock)             do {} while(0)
 266
 267 #endif
 268
 269 #define class_export_rpc_inc(exp)                                       \
 270 ({                                                                      \
 271         atomic_inc(&(exp)->exp_rpc_count);                              \
 272         CDEBUG(D_INFO, "RPC GETting export %p : new rpc_count %d\n",    \
 273                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 274 })
 275
 276 #define class_export_rpc_dec(exp)                                       \
 277 ({                                                                      \
 278         LASSERT_ATOMIC_POS(&exp->exp_rpc_count);                        \
 279         atomic_dec(&(exp)->exp_rpc_count);                              \
 280         CDEBUG(D_INFO, "RPC PUTting export %p : new rpc_count %d\n",    \
 281                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 282 })
 283
 284 #define class_export_lock_get(exp, lock)                                \
 285 ({                                                                      \
 286         atomic_inc(&(exp)->exp_locks_count);                            \
 287         __class_export_add_lock_ref(exp, lock);                         \
 288         CDEBUG(D_INFO, "lock GETting export %p : new locks_count %d\n", \
 289                (exp), atomic_read(&(exp)->exp_locks_count));            \
 290         class_export_get(exp);                                          \
 291 })
 292
 293 #define class_export_lock_put(exp, lock)                                \
 294 ({                                                                      \
 295         LASSERT_ATOMIC_POS(&exp->exp_locks_count);                      \
 296         atomic_dec(&(exp)->exp_locks_count);                            \
 297         __class_export_del_lock_ref(exp, lock);                         \
 298         CDEBUG(D_INFO, "lock PUTting export %p : new locks_count %d\n", \
 299                (exp), atomic_read(&(exp)->exp_locks_count));            \
 300         class_export_put(exp);                                          \
 301 })
 302
 303 #define class_export_cb_get(exp)                                        \
 304 ({                                                                      \
 305         atomic_inc(&(exp)->exp_cb_count);                               \
 306         CDEBUG(D_INFO, "callback GETting export %p : new cb_count %d\n",\
 307                (exp), atomic_read(&(exp)->exp_cb_count));               \
 308         class_export_get(exp);                                          \
 309 })
 310
 311 #define class_export_cb_put(exp)                                        \
 312 ({                                                                      \
 313         LASSERT_ATOMIC_POS(&exp->exp_cb_count);                         \
 314         atomic_dec(&(exp)->exp_cb_count);                               \
 315         CDEBUG(D_INFO, "callback PUTting export %p : new cb_count %d\n",\
 316                (exp), atomic_read(&(exp)->exp_cb_count));               \
 317         class_export_put(exp);                                          \
 318 })
 319
 320 /* genops.c */
 321 struct obd_export *class_export_get(struct obd_export *exp);
 322 void class_export_put(struct obd_export *exp);
 323 struct obd_export *class_new_export(struct obd_device *obddev,
 324                                     struct obd_uuid *cluuid);
 325 struct obd_export *class_new_export_self(struct obd_device *obd,
 326                                          struct obd_uuid *uuid);
 327 void class_unlink_export(struct obd_export *exp);
 328
 329 struct obd_import *class_import_get(struct obd_import *);
 330 void class_import_put(struct obd_import *);
 331 struct obd_import *class_new_import(struct obd_device *obd);
 332 void class_destroy_import(struct obd_import *exp);
 333
 334 struct obd_type *class_search_type(const char *name);
 335 struct obd_type *class_get_type(const char *name);
 336 void class_put_type(struct obd_type *type);
 337 int class_connect(struct lustre_handle *conn, struct obd_device *obd,
 338                   struct obd_uuid *cluuid);
 339 int class_disconnect(struct obd_export *exp);
 340 void class_fail_export(struct obd_export *exp);
 341 int class_connected_export(struct obd_export *exp);
 342 void class_disconnect_exports(struct obd_device *obddev);
 343 int class_manual_cleanup(struct obd_device *obd);
 344 void class_disconnect_stale_exports(struct obd_device *,
 345                                     int (*test_export)(struct obd_export *));
 346 static inline enum obd_option exp_flags_from_obd(struct obd_device *obd)
 347 {
 348         return ((obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 349                 (obd->obd_force ? OBD_OPT_FORCE : 0) |
 350                 (obd->obd_abort_recovery ? OBD_OPT_ABORT_RECOV : 0) |
 351                 0);
 352 }
 353
 354 #ifdef HAVE_SERVER_SUPPORT
 355 static inline struct lu_target *class_exp2tgt(struct obd_export *exp)
 356 {
 357         LASSERT(exp->exp_obd);
 358         if (exp->exp_obd->u.obt.obt_magic != OBT_MAGIC)
 359                 return NULL;
 360         return exp->exp_obd->u.obt.obt_lut;
 361 }
 362
 363 static inline struct lr_server_data *class_server_data(struct obd_device *obd)
 364 {
 365         LASSERT(obd->u.obt.obt_lut);
 366         return &obd->u.obt.obt_lut->lut_lsd;
 367 }
 368 #endif
 369
 370 /* obdo.c */
 371 struct lu_attr;
 372 struct inode;
 373
 374 void obdo_from_la(struct obdo *dst, const struct lu_attr *la, u64 valid);
 375 void la_from_obdo(struct lu_attr *la, const struct obdo *dst, u64 valid);
 376
 377 void obdo_cpy_md(struct obdo *dst, const struct obdo *src, u64 valid);
 378 void obdo_to_ioobj(const struct obdo *oa, struct obd_ioobj *ioobj);
 379
 380 #define OBT(dev)        (dev)->obd_type
 381 #define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 382 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
 383 #define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
 384
 385 /* Ensure obd_setup: used for cleanup which must be called
 386    while obd is stopping */
 387 #define OBD_CHECK_DEV(obd)                                      \
 388 do {                                                            \
 389         if (!(obd)) {                                           \
 390                 CERROR("NULL device\n");                        \
 391                 RETURN(-ENODEV);                                \
 392         }                                                       \
 393 } while (0)
 394
 395 /* ensure obd_setup and !obd_stopping */
 396 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 397 do {                                                            \
 398         OBD_CHECK_DEV(obd);                                     \
 399         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 400                 CERROR("Device %d not setup\n",                 \
 401                        (obd)->obd_minor);                       \
 402                 RETURN(-ENODEV);                                \
 403         }                                                       \
 404 } while (0)
 405
 406
 407 #ifdef CONFIG_PROC_FS
 408 #define OBD_COUNTER_OFFSET(op)                                                 \
 409         ((offsetof(struct obd_ops, o_ ## op) -                                 \
 410           offsetof(struct obd_ops, o_iocontrol))                               \
 411          / sizeof(((struct obd_ops *)NULL)->o_iocontrol))
 412
 413 /* The '- 1' below is for o_owner. */
 414 #define NUM_OBD_STATS                                                          \
 415         (sizeof(struct obd_ops) /                                              \
 416          sizeof(((struct obd_ops *)NULL)->o_iocontrol) - 1)
 417
 418 #define OBD_COUNTER_INCREMENT(obd, op)                                         \
 419         lprocfs_counter_incr((obd)->obd_stats,                                 \
 420                              (obd)->obd_cntr_base + OBD_COUNTER_OFFSET(op))
 421
 422 #define EXP_COUNTER_INCREMENT(exp, op)                                         \
 423         do {                                                                   \
 424                 unsigned int _off;                                             \
 425                 _off = (exp)->exp_obd->obd_cntr_base + OBD_COUNTER_OFFSET(op); \
 426                 lprocfs_counter_incr((exp)->exp_obd->obd_stats, _off);         \
 427                 if ((exp)->exp_obd->obd_uses_nid_stats &&                      \
 428                     (exp)->exp_nid_stats != NULL)                              \
 429                         lprocfs_counter_incr((exp)->exp_nid_stats->nid_stats,  \
 430                                              _off);                            \
 431         } while (0)
 432
 433 #define _MD_COUNTER_OFFSET(m_op)                                               \
 434         ((offsetof(struct md_ops, m_op) -                                      \
 435           offsetof(struct md_ops, MD_STATS_FIRST_OP)) /                        \
 436          sizeof(((struct md_ops *)NULL)->MD_STATS_FIRST_OP))
 437
 438 #define MD_COUNTER_OFFSET(op) _MD_COUNTER_OFFSET(m_ ## op)
 439
 440 #define NUM_MD_STATS                                                           \
 441         (_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) -                                \
 442          _MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) + 1)
 443
 444 /* Note that we only increment md counters for ops whose offset is less
 445  * than NUM_MD_STATS. This is explained in a comment in the definition
 446  * of struct md_ops. */
 447 #define EXP_MD_COUNTER_INCREMENT(exp, op)                                      \
 448         do {                                                                   \
 449                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS)                      \
 450                         lprocfs_counter_incr((exp)->exp_obd->obd_md_stats,     \
 451                                         (exp)->exp_obd->obd_md_cntr_base +     \
 452                                         MD_COUNTER_OFFSET(op));                \
 453         } while (0)
 454
 455 #else
 456 #define OBD_COUNTER_OFFSET(op)
 457 #define OBD_COUNTER_INCREMENT(obd, op)
 458 #define EXP_COUNTER_INCREMENT(exp, op)
 459 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 460 #endif
 461
 462 static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
 463 {
 464         /* Always add in ldlm_stats */
 465         tmp->nid_ldlm_stats =
 466                 lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC,
 467                                     LPROCFS_STATS_FLAG_NOPERCPU);
 468         if (tmp->nid_ldlm_stats == NULL)
 469                 return -ENOMEM;
 470
 471         lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
 472
 473         return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
 474                                       tmp->nid_ldlm_stats);
 475 }
 476
 477 #define EXP_CHECK_MD_OP(exp, op)                                        \
 478 do {                                                                    \
 479         if ((exp) == NULL) {                                            \
 480                 CERROR("obd_" #op ": NULL export\n");                   \
 481                 RETURN(-ENODEV);                                        \
 482         }                                                               \
 483         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {           \
 484                 CERROR("obd_" #op ": cleaned up obd\n");                \
 485                 RETURN(-EOPNOTSUPP);                                    \
 486         }                                                               \
 487         if (!OBT((exp)->exp_obd) || !MDP((exp)->exp_obd, op)) {         \
 488                 CERROR("%s: obd_" #op ": dev %d no operation\n",        \
 489                        (exp)->exp_obd->obd_name,                        \
 490                        (exp)->exp_obd->obd_minor);                      \
 491                 RETURN(-EOPNOTSUPP);                                    \
 492         }                                                               \
 493 } while (0)
 494
 495
 496 #define OBD_CHECK_DT_OP(obd, op, err)                                   \
 497 do {                                                                    \
 498         if (!OBT(obd) || !OBP((obd), op)) {                             \
 499                 if (err)                                                \
 500                         CERROR("%s: no obd_" #op " operation\n",        \
 501                                obd->obd_name);                          \
 502                 RETURN(err);                                            \
 503         }                                                               \
 504 } while (0)
 505
 506 #define EXP_CHECK_DT_OP(exp, op)                                        \
 507 do {                                                                    \
 508         if ((exp) == NULL) {                                            \
 509                 CERROR("obd_" #op ": NULL export\n");                   \
 510                 RETURN(-ENODEV);                                        \
 511         }                                                               \
 512         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {           \
 513                 CERROR("obd_" #op ": cleaned up obd\n");                \
 514                 RETURN(-EOPNOTSUPP);                                    \
 515         }                                                               \
 516         OBD_CHECK_DT_OP((exp)->exp_obd, op, -EOPNOTSUPP);               \
 517 } while (0)
 518
 519 #define CTXT_CHECK_OP(ctxt, op, err)                                    \
 520 do {                                                                    \
 521         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {                \
 522                 if (err)                                                \
 523                         CERROR("%s: no lop_" #op "operation\n",         \
 524                                ctxt->loc_obd->obd_name);                \
 525                 RETURN(err);                                            \
 526         }                                                               \
 527 } while (0)
 528
 529 static inline int class_devno_max(void)
 530 {
 531         return MAX_OBD_DEVICES;
 532 }
 533
 534 static inline int obd_get_info(const struct lu_env *env, struct obd_export *exp,
 535                                __u32 keylen, void *key,
 536                                __u32 *vallen, void *val)
 537 {
 538         int rc;
 539         ENTRY;
 540
 541         EXP_CHECK_DT_OP(exp, get_info);
 542         EXP_COUNTER_INCREMENT(exp, get_info);
 543
 544         rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val);
 545         RETURN(rc);
 546 }
 547
 548 static inline int obd_set_info_async(const struct lu_env *env,
 549                                      struct obd_export *exp,
 550                                      __u32 keylen, void *key,
 551                                      __u32 vallen, void *val,
 552                                      struct ptlrpc_request_set *set)
 553 {
 554         int rc;
 555         ENTRY;
 556
 557         EXP_CHECK_DT_OP(exp, set_info_async);
 558         EXP_COUNTER_INCREMENT(exp, set_info_async);
 559
 560         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 561                                                val, set);
 562         RETURN(rc);
 563 }
 564
 565 /*
 566  * obd-lu integration.
 567  *
 568  * Functionality is being moved into new lu_device-based layering, but some
 569  * pieces of configuration process are still based on obd devices.
 570  *
 571  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 572  * subsume ->o_setup() methods of obd devices they replace. The same for
 573  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 574  * result, obd_setup() and obd_process_config() branch and call one XOR
 575  * another.
 576  *
 577  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 578  * lu_device_type_operations::ldto_device_free() fully implement the
 579  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 580  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 581  */
 582 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 583 {
 584         int rc;
 585         struct lu_device_type *ldt = obd->obd_type->typ_lu;
 586         struct lu_device *d;
 587
 588         ENTRY;
 589
 590         if (ldt != NULL) {
 591                 struct lu_context  session_ctx;
 592                 struct lu_env env;
 593                 lu_context_init(&session_ctx, LCT_SESSION | LCT_SERVER_SESSION);
 594                 session_ctx.lc_thread = NULL;
 595                 lu_context_enter(&session_ctx);
 596
 597                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 598                 if (rc == 0) {
 599                         env.le_ses = &session_ctx;
 600                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 601                         lu_env_fini(&env);
 602                         if (!IS_ERR(d)) {
 603                                 obd->obd_lu_dev = d;
 604                                 d->ld_obd = obd;
 605                                 rc = 0;
 606                         } else
 607                                 rc = PTR_ERR(d);
 608                 }
 609                 lu_context_exit(&session_ctx);
 610                 lu_context_fini(&session_ctx);
 611
 612         } else {
 613                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
 614                 OBD_COUNTER_INCREMENT(obd, setup);
 615                 rc = OBP(obd, setup)(obd, cfg);
 616         }
 617         RETURN(rc);
 618 }
 619
 620 static inline int obd_precleanup(struct obd_device *obd)
 621 {
 622         int rc;
 623         struct lu_device_type *ldt = obd->obd_type->typ_lu;
 624         struct lu_device *d = obd->obd_lu_dev;
 625
 626         ENTRY;
 627
 628         if (ldt != NULL && d != NULL) {
 629                 struct lu_env env;
 630
 631                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 632                 if (rc == 0) {
 633                         ldt->ldt_ops->ldto_device_fini(&env, d);
 634                         lu_env_fini(&env);
 635                 }
 636         }
 637         OBD_CHECK_DT_OP(obd, precleanup, 0);
 638         OBD_COUNTER_INCREMENT(obd, precleanup);
 639
 640         rc = OBP(obd, precleanup)(obd);
 641         RETURN(rc);
 642 }
 643
 644 static inline int obd_cleanup(struct obd_device *obd)
 645 {
 646         int rc;
 647         struct lu_device_type *ldt = obd->obd_type->typ_lu;
 648         struct lu_device *d = obd->obd_lu_dev;
 649
 650         ENTRY;
 651         if (ldt != NULL && d != NULL) {
 652                 struct lu_env env;
 653
 654                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 655                 if (rc == 0) {
 656                         ldt->ldt_ops->ldto_device_free(&env, d);
 657                         lu_env_fini(&env);
 658                         obd->obd_lu_dev = NULL;
 659                 }
 660         }
 661         OBD_CHECK_DT_OP(obd, cleanup, 0);
 662         OBD_COUNTER_INCREMENT(obd, cleanup);
 663
 664         rc = OBP(obd, cleanup)(obd);
 665         RETURN(rc);
 666 }
 667
 668 static inline void obd_cleanup_client_import(struct obd_device *obd)
 669 {
 670         ENTRY;
 671
 672         /* If we set up but never connected, the
 673            client import will not have been cleaned. */
 674         down_write(&obd->u.cli.cl_sem);
 675         if (obd->u.cli.cl_import) {
 676                 struct obd_import *imp;
 677                 imp = obd->u.cli.cl_import;
 678                 CDEBUG(D_CONFIG, "%s: client import never connected\n",
 679                        obd->obd_name);
 680                 ptlrpc_invalidate_import(imp);
 681                 client_destroy_import(imp);
 682                 obd->u.cli.cl_import = NULL;
 683         }
 684         up_write(&obd->u.cli.cl_sem);
 685
 686         EXIT;
 687 }
 688
 689 static inline int
 690 obd_process_config(struct obd_device *obd, int datalen, void *data)
 691 {
 692         int rc;
 693         struct lu_device_type *ldt = obd->obd_type->typ_lu;
 694         struct lu_device *d = obd->obd_lu_dev;
 695
 696         ENTRY;
 697
 698         obd->obd_process_conf = 1;
 699         if (ldt != NULL && d != NULL) {
 700                 struct lu_env env;
 701
 702                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 703                 if (rc == 0) {
 704                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 705                         lu_env_fini(&env);
 706                 }
 707         } else {
 708                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
 709                 rc = OBP(obd, process_config)(obd, datalen, data);
 710         }
 711         OBD_COUNTER_INCREMENT(obd, process_config);
 712         obd->obd_process_conf = 0;
 713
 714         RETURN(rc);
 715 }
 716
 717 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 718                              struct obdo *obdo)
 719 {
 720         int rc;
 721         ENTRY;
 722
 723         EXP_CHECK_DT_OP(exp, create);
 724         EXP_COUNTER_INCREMENT(exp, create);
 725
 726         rc = OBP(exp->exp_obd, create)(env, exp, obdo);
 727         RETURN(rc);
 728 }
 729
 730 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 731                               struct obdo *obdo)
 732 {
 733         int rc;
 734         ENTRY;
 735
 736         EXP_CHECK_DT_OP(exp, destroy);
 737         EXP_COUNTER_INCREMENT(exp, destroy);
 738
 739         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo);
 740         RETURN(rc);
 741 }
 742
 743 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 744                               struct obdo *oa)
 745 {
 746         int rc;
 747
 748         ENTRY;
 749         EXP_CHECK_DT_OP(exp, getattr);
 750         EXP_COUNTER_INCREMENT(exp, getattr);
 751         rc = OBP(exp->exp_obd, getattr)(env, exp, oa);
 752
 753         RETURN(rc);
 754 }
 755
 756 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 757                               struct obdo *oa)
 758 {
 759         int rc;
 760
 761         ENTRY;
 762         EXP_CHECK_DT_OP(exp, setattr);
 763         EXP_COUNTER_INCREMENT(exp, setattr);
 764         rc = OBP(exp->exp_obd, setattr)(env, exp, oa);
 765
 766         RETURN(rc);
 767 }
 768
 769 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 770                                int priority)
 771 {
 772         struct obd_device *obd = imp->imp_obd;
 773         int rc;
 774         ENTRY;
 775
 776         OBD_CHECK_DEV_ACTIVE(obd);
 777         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 778         OBD_COUNTER_INCREMENT(obd, add_conn);
 779
 780         rc = OBP(obd, add_conn)(imp, uuid, priority);
 781         RETURN(rc);
 782 }
 783
 784 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 785 {
 786         struct obd_device *obd = imp->imp_obd;
 787         int rc;
 788         ENTRY;
 789
 790         OBD_CHECK_DEV_ACTIVE(obd);
 791         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 792         OBD_COUNTER_INCREMENT(obd, del_conn);
 793
 794         rc = OBP(obd, del_conn)(imp, uuid);
 795         RETURN(rc);
 796 }
 797
 798 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 799 {
 800         struct obd_uuid *uuid;
 801         ENTRY;
 802
 803         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 804         EXP_COUNTER_INCREMENT(exp, get_uuid);
 805
 806         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 807         RETURN(uuid);
 808 }
 809
 810 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 811  * @param exp New export handle
 812  * @param d Connect data, supported flags are set, flags also understood
 813  *    by obd are returned.
 814  */
 815 static inline int obd_connect(const struct lu_env *env,
 816                               struct obd_export **exp,struct obd_device *obd,
 817                               struct obd_uuid *cluuid,
 818                               struct obd_connect_data *data,
 819                               void *localdata)
 820 {
 821         int rc;
 822         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 823                                                    * check */
 824         ENTRY;
 825
 826         OBD_CHECK_DEV_ACTIVE(obd);
 827         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
 828         OBD_COUNTER_INCREMENT(obd, connect);
 829
 830         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 831         /* check that only subset is granted */
 832         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
 833                                     data->ocd_connect_flags));
 834         RETURN(rc);
 835 }
 836
 837 static inline int obd_reconnect(const struct lu_env *env,
 838                                 struct obd_export *exp,
 839                                 struct obd_device *obd,
 840                                 struct obd_uuid *cluuid,
 841                                 struct obd_connect_data *d,
 842                                 void *localdata)
 843 {
 844         int rc;
 845         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
 846                                                    * check */
 847
 848         ENTRY;
 849
 850         OBD_CHECK_DEV_ACTIVE(obd);
 851         OBD_CHECK_DT_OP(obd, reconnect, 0);
 852         OBD_COUNTER_INCREMENT(obd, reconnect);
 853
 854         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 855         /* check that only subset is granted */
 856         LASSERT(ergo(d != NULL,
 857                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 858         RETURN(rc);
 859 }
 860
 861 static inline int obd_disconnect(struct obd_export *exp)
 862 {
 863         int rc;
 864         ENTRY;
 865
 866         EXP_CHECK_DT_OP(exp, disconnect);
 867         EXP_COUNTER_INCREMENT(exp, disconnect);
 868
 869         rc = OBP(exp->exp_obd, disconnect)(exp);
 870         RETURN(rc);
 871 }
 872
 873 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
 874                                enum lu_cli_type type)
 875 {
 876         int rc;
 877         ENTRY;
 878
 879         OBD_CHECK_DT_OP(obd, fid_init, 0);
 880         OBD_COUNTER_INCREMENT(obd, fid_init);
 881
 882         rc = OBP(obd, fid_init)(obd, exp, type);
 883         RETURN(rc);
 884 }
 885
 886 static inline int obd_fid_fini(struct obd_device *obd)
 887 {
 888         int rc;
 889         ENTRY;
 890
 891         OBD_CHECK_DT_OP(obd, fid_fini, 0);
 892         OBD_COUNTER_INCREMENT(obd, fid_fini);
 893
 894         rc = OBP(obd, fid_fini)(obd);
 895         RETURN(rc);
 896 }
 897
 898 static inline int obd_fid_alloc(const struct lu_env *env,
 899                                 struct obd_export *exp,
 900                                 struct lu_fid *fid,
 901                                 struct md_op_data *op_data)
 902 {
 903         int rc;
 904         ENTRY;
 905
 906         EXP_CHECK_DT_OP(exp, fid_alloc);
 907         EXP_COUNTER_INCREMENT(exp, fid_alloc);
 908
 909         rc = OBP(exp->exp_obd, fid_alloc)(env, exp, fid, op_data);
 910         RETURN(rc);
 911 }
 912
 913 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
 914 {
 915         int rc;
 916         ENTRY;
 917
 918         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
 919         EXP_COUNTER_INCREMENT(exp, ping);
 920
 921         rc = OBP(exp->exp_obd, ping)(env, exp);
 922         RETURN(rc);
 923 }
 924
 925 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
 926 {
 927         int rc;
 928         ENTRY;
 929
 930         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
 931         OBD_COUNTER_INCREMENT(obd, pool_new);
 932
 933         rc = OBP(obd, pool_new)(obd, poolname);
 934         RETURN(rc);
 935 }
 936
 937 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
 938 {
 939         int rc;
 940         ENTRY;
 941
 942         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
 943         OBD_COUNTER_INCREMENT(obd, pool_del);
 944
 945         rc = OBP(obd, pool_del)(obd, poolname);
 946         RETURN(rc);
 947 }
 948
 949 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
 950 {
 951         int rc;
 952         ENTRY;
 953
 954         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
 955         OBD_COUNTER_INCREMENT(obd, pool_add);
 956
 957         rc = OBP(obd, pool_add)(obd, poolname, ostname);
 958         RETURN(rc);
 959 }
 960
 961 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
 962 {
 963         int rc;
 964         ENTRY;
 965
 966         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
 967         OBD_COUNTER_INCREMENT(obd, pool_rem);
 968
 969         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
 970         RETURN(rc);
 971 }
 972
 973 static inline void obd_getref(struct obd_device *obd)
 974 {
 975         ENTRY;
 976         if (OBT(obd) && OBP(obd, getref)) {
 977                 OBD_COUNTER_INCREMENT(obd, getref);
 978                 OBP(obd, getref)(obd);
 979         }
 980         EXIT;
 981 }
 982
 983 static inline void obd_putref(struct obd_device *obd)
 984 {
 985         ENTRY;
 986         if (OBT(obd) && OBP(obd, putref)) {
 987                 OBD_COUNTER_INCREMENT(obd, putref);
 988                 OBP(obd, putref)(obd);
 989         }
 990         EXIT;
 991 }
 992
 993 static inline int obd_init_export(struct obd_export *exp)
 994 {
 995         int rc = 0;
 996
 997         ENTRY;
 998         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
 999             OBP((exp)->exp_obd, init_export))
1000                 rc = OBP(exp->exp_obd, init_export)(exp);
1001         RETURN(rc);
1002 }
1003
1004 static inline int obd_destroy_export(struct obd_export *exp)
1005 {
1006         ENTRY;
1007         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1008             OBP((exp)->exp_obd, destroy_export))
1009                 OBP(exp->exp_obd, destroy_export)(exp);
1010         RETURN(0);
1011 }
1012
1013 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1014  * If the cache is older than @max_age we will get a new value from the
1015  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1016 static inline int obd_statfs_async(struct obd_export *exp,
1017                                    struct obd_info *oinfo,
1018                                    __u64 max_age,
1019                                    struct ptlrpc_request_set *rqset)
1020 {
1021         int rc = 0;
1022         struct obd_device *obd;
1023         ENTRY;
1024
1025         if (exp == NULL || exp->exp_obd == NULL)
1026                 RETURN(-EINVAL);
1027
1028         obd = exp->exp_obd;
1029         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1030         OBD_COUNTER_INCREMENT(obd, statfs);
1031
1032         CDEBUG(D_SUPER, "%s: osfs %p age %llu, max_age %llu\n",
1033                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1034         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1035                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1036         } else {
1037                 CDEBUG(D_SUPER, "%s: use %p cache blocks %llu/%llu objects %llu/%llu\n",
1038                        obd->obd_name, &obd->obd_osfs,
1039                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1040                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1041                 spin_lock(&obd->obd_osfs_lock);
1042                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1043                 spin_unlock(&obd->obd_osfs_lock);
1044                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1045                 if (oinfo->oi_cb_up)
1046                         oinfo->oi_cb_up(oinfo, 0);
1047         }
1048         RETURN(rc);
1049 }
1050
1051 static inline int obd_statfs_rqset(struct obd_export *exp,
1052                                    struct obd_statfs *osfs, __u64 max_age,
1053                                    __u32 flags)
1054 {
1055         struct ptlrpc_request_set *set = NULL;
1056         struct obd_info oinfo = {
1057                 .oi_osfs = osfs,
1058                 .oi_flags = flags,
1059         };
1060         int rc = 0;
1061
1062         ENTRY;
1063
1064         set = ptlrpc_prep_set();
1065         if (set == NULL)
1066                 RETURN(-ENOMEM);
1067
1068         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1069         if (rc == 0)
1070                 rc = ptlrpc_set_wait(set);
1071
1072         ptlrpc_set_destroy(set);
1073
1074         RETURN(rc);
1075 }
1076
1077 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1078  * If the cache is older than @max_age we will get a new value from the
1079  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1080 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1081                              struct obd_statfs *osfs, __u64 max_age,
1082                              __u32 flags)
1083 {
1084         int rc = 0;
1085         struct obd_device *obd = exp->exp_obd;
1086         ENTRY;
1087
1088         if (obd == NULL)
1089                 RETURN(-EINVAL);
1090
1091         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1092         OBD_COUNTER_INCREMENT(obd, statfs);
1093
1094         CDEBUG(D_SUPER, "osfs %llu, max_age %llu\n",
1095                obd->obd_osfs_age, max_age);
1096         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1097                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1098                 if (rc == 0) {
1099                         spin_lock(&obd->obd_osfs_lock);
1100                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1101                         obd->obd_osfs_age = cfs_time_current_64();
1102                         spin_unlock(&obd->obd_osfs_lock);
1103                 }
1104         } else {
1105                 CDEBUG(D_SUPER, "%s: use %p cache blocks %llu/%llu"
1106                        " objects %llu/%llu\n",
1107                        obd->obd_name, &obd->obd_osfs,
1108                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1109                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1110                 spin_lock(&obd->obd_osfs_lock);
1111                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1112                 spin_unlock(&obd->obd_osfs_lock);
1113         }
1114         RETURN(rc);
1115 }
1116
1117 static inline int obd_preprw(const struct lu_env *env, int cmd,
1118                              struct obd_export *exp, struct obdo *oa,
1119                              int objcount, struct obd_ioobj *obj,
1120                              struct niobuf_remote *remote, int *pages,
1121                              struct niobuf_local *local)
1122 {
1123         int rc;
1124
1125         ENTRY;
1126         EXP_CHECK_DT_OP(exp, preprw);
1127         EXP_COUNTER_INCREMENT(exp, preprw);
1128         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1129                                        pages, local);
1130
1131         RETURN(rc);
1132 }
1133
1134 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1135                                struct obd_export *exp, struct obdo *oa,
1136                                int objcount, struct obd_ioobj *obj,
1137                                struct niobuf_remote *rnb, int pages,
1138                                struct niobuf_local *local, int rc)
1139 {
1140         ENTRY;
1141
1142         EXP_CHECK_DT_OP(exp, commitrw);
1143         EXP_COUNTER_INCREMENT(exp, commitrw);
1144         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1145                                          rnb, pages, local, rc);
1146
1147         RETURN(rc);
1148 }
1149
1150 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1151                                 int len, void *karg, void __user *uarg)
1152 {
1153         int rc;
1154         ENTRY;
1155
1156         EXP_CHECK_DT_OP(exp, iocontrol);
1157         EXP_COUNTER_INCREMENT(exp, iocontrol);
1158
1159         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1160         RETURN(rc);
1161 }
1162
1163 static inline void obd_import_event(struct obd_device *obd,
1164                                     struct obd_import *imp,
1165                                     enum obd_import_event event)
1166 {
1167         ENTRY;
1168         if (!obd) {
1169                 CERROR("NULL device\n");
1170                 EXIT;
1171                 return;
1172         }
1173         if (obd->obd_set_up && OBP(obd, import_event)) {
1174                 OBD_COUNTER_INCREMENT(obd, import_event);
1175                 OBP(obd, import_event)(obd, imp, event);
1176         }
1177         EXIT;
1178 }
1179
1180 static inline int obd_notify(struct obd_device *obd,
1181                              struct obd_device *watched,
1182                              enum obd_notify_event ev)
1183 {
1184         int rc;
1185         ENTRY;
1186         OBD_CHECK_DEV(obd);
1187
1188         if (!obd->obd_set_up) {
1189                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1190                 RETURN(-EINVAL);
1191         }
1192
1193         if (!OBP(obd, notify)) {
1194                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1195                 RETURN(-ENOSYS);
1196         }
1197
1198         OBD_COUNTER_INCREMENT(obd, notify);
1199         rc = OBP(obd, notify)(obd, watched, ev);
1200
1201         RETURN(rc);
1202 }
1203
1204 static inline int obd_notify_observer(struct obd_device *observer,
1205                                       struct obd_device *observed,
1206                                       enum obd_notify_event ev)
1207 {
1208         int rc = 0;
1209         int rc2 = 0;
1210         struct obd_notify_upcall *onu;
1211
1212         if (observer->obd_observer)
1213                 rc = obd_notify(observer->obd_observer, observed, ev);
1214
1215         /*
1216          * Also, call non-obd listener, if any
1217          */
1218         onu = &observer->obd_upcall;
1219         if (onu->onu_upcall != NULL)
1220                 rc2 = onu->onu_upcall(observer, observed, ev, onu->onu_owner);
1221
1222         return rc ? rc : rc2;
1223 }
1224
1225 static inline int obd_quotactl(struct obd_export *exp,
1226                                struct obd_quotactl *oqctl)
1227 {
1228         int rc;
1229         ENTRY;
1230
1231         EXP_CHECK_DT_OP(exp, quotactl);
1232         EXP_COUNTER_INCREMENT(exp, quotactl);
1233
1234         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1235         RETURN(rc);
1236 }
1237
1238 static inline int obd_health_check(const struct lu_env *env,
1239                                    struct obd_device *obd)
1240 {
1241         /* returns: 0 on healthy
1242          *         >0 on unhealthy + reason code/flag
1243          *            however the only suppored reason == 1 right now
1244          *            We'll need to define some better reasons
1245          *            or flags in the future.
1246          *         <0 on error
1247          */
1248         int rc;
1249         ENTRY;
1250
1251         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1252         if (obd == NULL || !OBT(obd)) {
1253                 CERROR("cleaned up obd\n");
1254                 RETURN(-EOPNOTSUPP);
1255         }
1256         if (!obd->obd_set_up || obd->obd_stopping)
1257                 RETURN(0);
1258         if (!OBP(obd, health_check))
1259                 RETURN(0);
1260
1261         rc = OBP(obd, health_check)(env, obd);
1262         RETURN(rc);
1263 }
1264
1265 static inline int obd_register_observer(struct obd_device *obd,
1266                                         struct obd_device *observer)
1267 {
1268         ENTRY;
1269         OBD_CHECK_DEV(obd);
1270         down_write(&obd->obd_observer_link_sem);
1271         if (obd->obd_observer && observer) {
1272                 up_write(&obd->obd_observer_link_sem);
1273                 RETURN(-EALREADY);
1274         }
1275         obd->obd_observer = observer;
1276         up_write(&obd->obd_observer_link_sem);
1277         RETURN(0);
1278 }
1279
1280 /* metadata helpers */
1281 static inline int md_get_root(struct obd_export *exp, const char *fileset,
1282                               struct lu_fid *fid)
1283 {
1284         int rc;
1285
1286         ENTRY;
1287         EXP_CHECK_MD_OP(exp, get_root);
1288         EXP_MD_COUNTER_INCREMENT(exp, get_root);
1289         rc = MDP(exp->exp_obd, get_root)(exp, fileset, fid);
1290
1291         RETURN(rc);
1292 }
1293
1294 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1295                              struct ptlrpc_request **request)
1296 {
1297         int rc;
1298         ENTRY;
1299         EXP_CHECK_MD_OP(exp, getattr);
1300         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1301         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1302         RETURN(rc);
1303 }
1304
1305 static inline int md_null_inode(struct obd_export *exp,
1306                                    const struct lu_fid *fid)
1307 {
1308         int rc;
1309         ENTRY;
1310         EXP_CHECK_MD_OP(exp, null_inode);
1311         EXP_MD_COUNTER_INCREMENT(exp, null_inode);
1312         rc = MDP(exp->exp_obd, null_inode)(exp, fid);
1313         RETURN(rc);
1314 }
1315
1316 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1317                            struct md_open_data *mod,
1318                            struct ptlrpc_request **request)
1319 {
1320         int rc;
1321         ENTRY;
1322         EXP_CHECK_MD_OP(exp, close);
1323         EXP_MD_COUNTER_INCREMENT(exp, close);
1324         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1325         RETURN(rc);
1326 }
1327
1328 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1329                             const void *data, size_t datalen, umode_t mode,
1330                             uid_t uid, gid_t gid, cfs_cap_t cap_effective,
1331                             __u64 rdev, struct ptlrpc_request **request)
1332 {
1333         int rc;
1334         ENTRY;
1335         EXP_CHECK_MD_OP(exp, create);
1336         EXP_MD_COUNTER_INCREMENT(exp, create);
1337         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1338                                        uid, gid, cap_effective, rdev, request);
1339         RETURN(rc);
1340 }
1341
1342 static inline int md_enqueue(struct obd_export *exp,
1343                              struct ldlm_enqueue_info *einfo,
1344                              const union ldlm_policy_data *policy,
1345                              struct md_op_data *op_data,
1346                              struct lustre_handle *lockh,
1347                              __u64 extra_lock_flags)
1348 {
1349         int rc;
1350         ENTRY;
1351         EXP_CHECK_MD_OP(exp, enqueue);
1352         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1353         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, policy, op_data, lockh,
1354                                         extra_lock_flags);
1355         RETURN(rc);
1356 }
1357
1358 static inline int md_getattr_name(struct obd_export *exp,
1359                                   struct md_op_data *op_data,
1360                                   struct ptlrpc_request **request)
1361 {
1362         int rc;
1363         ENTRY;
1364         EXP_CHECK_MD_OP(exp, getattr_name);
1365         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1366         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1367         RETURN(rc);
1368 }
1369
1370 static inline int md_intent_lock(struct obd_export *exp,
1371                                  struct md_op_data *op_data,
1372                                  struct lookup_intent *it,
1373                                  struct ptlrpc_request **reqp,
1374                                  ldlm_blocking_callback cb_blocking,
1375                                  __u64 extra_lock_flags)
1376 {
1377         int rc;
1378         ENTRY;
1379         EXP_CHECK_MD_OP(exp, intent_lock);
1380         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1381         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, it, reqp, cb_blocking,
1382                                             extra_lock_flags);
1383         RETURN(rc);
1384 }
1385
1386 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1387                           struct ptlrpc_request **request)
1388 {
1389         int rc;
1390         ENTRY;
1391         EXP_CHECK_MD_OP(exp, link);
1392         EXP_MD_COUNTER_INCREMENT(exp, link);
1393         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1394         RETURN(rc);
1395 }
1396
1397 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1398                             const char *old, size_t oldlen, const char *new,
1399                             size_t newlen, struct ptlrpc_request **request)
1400 {
1401         int rc;
1402         ENTRY;
1403         EXP_CHECK_MD_OP(exp, rename);
1404         EXP_MD_COUNTER_INCREMENT(exp, rename);
1405         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1406                                        newlen, request);
1407         RETURN(rc);
1408 }
1409
1410 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
1411                              void *ea, size_t ealen,
1412                              struct ptlrpc_request **request)
1413 {
1414         int rc;
1415         ENTRY;
1416         EXP_CHECK_MD_OP(exp, setattr);
1417         EXP_MD_COUNTER_INCREMENT(exp, setattr);
1418         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen, request);
1419         RETURN(rc);
1420 }
1421
1422 static inline int md_fsync(struct obd_export *exp, const struct lu_fid *fid,
1423                            struct ptlrpc_request **request)
1424 {
1425         int rc;
1426
1427         ENTRY;
1428         EXP_CHECK_MD_OP(exp, fsync);
1429         EXP_MD_COUNTER_INCREMENT(exp, fsync);
1430         rc = MDP(exp->exp_obd, fsync)(exp, fid, request);
1431
1432         RETURN(rc);
1433 }
1434
1435 static inline int md_read_page(struct obd_export *exp,
1436                                struct md_op_data *op_data,
1437                                struct md_callback *cb_op,
1438                                __u64  hash_offset,
1439                                struct page **ppage)
1440 {
1441         int rc;
1442         ENTRY;
1443         EXP_CHECK_MD_OP(exp, read_page);
1444         EXP_MD_COUNTER_INCREMENT(exp, read_page);
1445         rc = MDP(exp->exp_obd, read_page)(exp, op_data, cb_op, hash_offset,
1446                                           ppage);
1447         RETURN(rc);
1448 }
1449
1450 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
1451                             struct ptlrpc_request **request)
1452 {
1453         int rc;
1454         ENTRY;
1455         EXP_CHECK_MD_OP(exp, unlink);
1456         EXP_MD_COUNTER_INCREMENT(exp, unlink);
1457         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
1458         RETURN(rc);
1459 }
1460
1461 static inline int md_get_lustre_md(struct obd_export *exp,
1462                                    struct ptlrpc_request *req,
1463                                    struct obd_export *dt_exp,
1464                                    struct obd_export *md_exp,
1465                                    struct lustre_md *md)
1466 {
1467         ENTRY;
1468         EXP_CHECK_MD_OP(exp, get_lustre_md);
1469         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
1470         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
1471 }
1472
1473 static inline int md_free_lustre_md(struct obd_export *exp,
1474                                     struct lustre_md *md)
1475 {
1476         ENTRY;
1477         EXP_CHECK_MD_OP(exp, free_lustre_md);
1478         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
1479         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
1480 }
1481
1482 static inline int md_merge_attr(struct obd_export *exp,
1483                                 const struct lmv_stripe_md *lsm,
1484                                 struct cl_attr *attr,
1485                                 ldlm_blocking_callback cb)
1486 {
1487         ENTRY;
1488         EXP_CHECK_MD_OP(exp, merge_attr);
1489         EXP_MD_COUNTER_INCREMENT(exp, merge_attr);
1490         RETURN(MDP(exp->exp_obd, merge_attr)(exp, lsm, attr, cb));
1491 }
1492
1493 static inline int md_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1494                               u64 valid, const char *name,
1495                               const char *input, int input_size,
1496                               int output_size, int flags, __u32 suppgid,
1497                               struct ptlrpc_request **request)
1498 {
1499         ENTRY;
1500         EXP_CHECK_MD_OP(exp, setxattr);
1501         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
1502         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, valid, name, input,
1503                                            input_size, output_size, flags,
1504                                            suppgid, request));
1505 }
1506
1507 static inline int md_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1508                               u64 valid, const char *name,
1509                               const char *input, int input_size,
1510                               int output_size, int flags,
1511                               struct ptlrpc_request **request)
1512 {
1513         ENTRY;
1514         EXP_CHECK_MD_OP(exp, getxattr);
1515         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
1516         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, valid, name, input,
1517                                            input_size, output_size, flags,
1518                                            request));
1519 }
1520
1521 static inline int md_set_open_replay_data(struct obd_export *exp,
1522                                           struct obd_client_handle *och,
1523                                           struct lookup_intent *it)
1524 {
1525         ENTRY;
1526         EXP_CHECK_MD_OP(exp, set_open_replay_data);
1527         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
1528         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, it));
1529 }
1530
1531 static inline int md_clear_open_replay_data(struct obd_export *exp,
1532                                             struct obd_client_handle *och)
1533 {
1534         ENTRY;
1535         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
1536         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
1537         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
1538 }
1539
1540 static inline int md_set_lock_data(struct obd_export *exp,
1541                                    const struct lustre_handle *lockh,
1542                                    void *data, __u64 *bits)
1543 {
1544         ENTRY;
1545         EXP_CHECK_MD_OP(exp, set_lock_data);
1546         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
1547         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
1548 }
1549
1550 static inline
1551 int md_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
1552                      union ldlm_policy_data *policy, enum ldlm_mode mode,
1553                      enum ldlm_cancel_flags cancel_flags, void *opaque)
1554 {
1555         int rc;
1556         ENTRY;
1557
1558         EXP_CHECK_MD_OP(exp, cancel_unused);
1559         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
1560
1561         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
1562                                               cancel_flags, opaque);
1563         RETURN(rc);
1564 }
1565
1566 static inline enum ldlm_mode md_lock_match(struct obd_export *exp, __u64 flags,
1567                                            const struct lu_fid *fid,
1568                                            enum ldlm_type type,
1569                                            union ldlm_policy_data *policy,
1570                                            enum ldlm_mode mode,
1571                                            struct lustre_handle *lockh)
1572 {
1573         ENTRY;
1574         EXP_CHECK_MD_OP(exp, lock_match);
1575         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
1576         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
1577                                              policy, mode, lockh));
1578 }
1579
1580 static inline int md_init_ea_size(struct obd_export *exp, __u32 ea_size,
1581                                   __u32 def_ea_size)
1582 {
1583         ENTRY;
1584         EXP_CHECK_MD_OP(exp, init_ea_size);
1585         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
1586         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, ea_size, def_ea_size));
1587 }
1588
1589 static inline int md_intent_getattr_async(struct obd_export *exp,
1590                                           struct md_enqueue_info *minfo)
1591 {
1592         int rc;
1593         ENTRY;
1594         EXP_CHECK_MD_OP(exp, intent_getattr_async);
1595         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
1596         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo);
1597         RETURN(rc);
1598 }
1599
1600 static inline int md_revalidate_lock(struct obd_export *exp,
1601                                      struct lookup_intent *it,
1602                                      struct lu_fid *fid, __u64 *bits)
1603 {
1604         int rc;
1605         ENTRY;
1606         EXP_CHECK_MD_OP(exp, revalidate_lock);
1607         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
1608         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
1609         RETURN(rc);
1610 }
1611
1612 static inline int md_get_fid_from_lsm(struct obd_export *exp,
1613                                       const struct lmv_stripe_md *lsm,
1614                                       const char *name, int namelen,
1615                                       struct lu_fid *fid)
1616 {
1617         int rc;
1618         ENTRY;
1619         EXP_CHECK_MD_OP(exp, get_fid_from_lsm);
1620         EXP_MD_COUNTER_INCREMENT(exp, get_fid_from_lsm);
1621         rc = MDP(exp->exp_obd, get_fid_from_lsm)(exp, lsm, name, namelen, fid);
1622         RETURN(rc);
1623 }
1624
1625
1626 /* Unpack an MD struct from disk to in-memory format.
1627  * Returns +ve size of unpacked MD (0 for free), or -ve error.
1628  *
1629  * If *plsm != NULL and lmm == NULL then *lsm will be freed.
1630  * If *plsm == NULL then it will be allocated.
1631  */
1632 static inline int md_unpackmd(struct obd_export *exp,
1633                               struct lmv_stripe_md **plsm,
1634                               const union lmv_mds_md *lmm, size_t lmm_size)
1635 {
1636         int rc;
1637         ENTRY;
1638         EXP_CHECK_MD_OP(exp, unpackmd);
1639         EXP_MD_COUNTER_INCREMENT(exp, unpackmd);
1640         rc = MDP(exp->exp_obd, unpackmd)(exp, plsm, lmm, lmm_size);
1641         RETURN(rc);
1642 }
1643
1644 /* OBD Metadata Support */
1645
1646 extern int obd_init_caches(void);
1647 extern void obd_cleanup_caches(void);
1648
1649 /* support routines */
1650 extern struct kmem_cache *obdo_cachep;
1651
1652 #define OBDO_ALLOC(ptr)                                                       \
1653 do {                                                                          \
1654         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, GFP_NOFS);             \
1655 } while(0)
1656
1657 #define OBDO_FREE(ptr)                                                        \
1658 do {                                                                          \
1659         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1660 } while(0)
1661
1662
1663 typedef int (*register_lwp_cb)(void *data);
1664
1665 struct lwp_register_item {
1666         struct obd_export **lri_exp;
1667         register_lwp_cb     lri_cb_func;
1668         void               *lri_cb_data;
1669         struct list_head    lri_list;
1670         atomic_t            lri_ref;
1671         char                lri_name[MTI_NAME_MAXLEN];
1672 };
1673
1674 /* I'm as embarrassed about this as you are.
1675  *
1676  * <shaver> // XXX do not look into _superhack with remaining eye
1677  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1678 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1679
1680 /* obd_mount.c */
1681 #ifdef HAVE_SERVER_SUPPORT
1682 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
1683                              register_lwp_cb cb_func, void *cb_data);
1684 void lustre_deregister_lwp_item(struct obd_export **exp);
1685 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx);
1686 void lustre_notify_lwp_list(struct obd_export *exp);
1687 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx);
1688 #endif /* HAVE_SERVER_SUPPORT */
1689 int lustre_register_fs(void);
1690 int lustre_unregister_fs(void);
1691 int lustre_check_exclusion(struct super_block *sb, char *svname);
1692
1693 /* sysctl.c */
1694 extern int obd_sysctl_init(void);
1695 extern void obd_sysctl_clean(void);
1696
1697 typedef __u8 class_uuid_t[16];
1698 static inline void class_uuid_unparse(class_uuid_t uu, struct obd_uuid *out)
1699 {
1700         snprintf(out->uuid, sizeof(out->uuid), "%02x%02x%02x%02x-%02x%02x-"
1701                  "%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
1702                  uu[14], uu[15], uu[12], uu[13], uu[10], uu[11], uu[8], uu[9],
1703                  uu[6], uu[7], uu[4], uu[5], uu[2], uu[3], uu[0], uu[1]);
1704 }
1705
1706 /* lustre_peer.c    */
1707 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
1708 int class_add_uuid(const char *uuid, __u64 nid);
1709 int class_del_uuid (const char *uuid);
1710 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
1711
1712 /* class_obd.c */
1713 extern char obd_jobid_node[];
1714
1715 /* prng.c */
1716 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
1717
1718 /* statfs_pack.c */
1719 struct kstatfs;
1720 void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
1721 void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);
1722
1723 /* root squash info */
1724 struct rw_semaphore;
1725 struct root_squash_info {
1726         uid_t                   rsi_uid;
1727         gid_t                   rsi_gid;
1728         struct list_head        rsi_nosquash_nids;
1729         struct rw_semaphore     rsi_sem;
1730 };
1731
1732 int server_name2index(const char *svname, __u32 *idx, const char **endptr);
1733
1734 /* linux-module.c */
1735 extern struct miscdevice obd_psdev;
1736 int obd_ioctl_getdata(char **buf, int *len, void __user *arg);
1737 int class_procfs_init(void);
1738 int class_procfs_clean(void);
1739
1740 #endif /* __LINUX_OBD_CLASS_H */