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 OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 381 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
 382
 383 /* Ensure obd_setup: used for cleanup which must be called
 384    while obd is stopping */
 385 #define OBD_CHECK_DEV(obd)                                      \
 386 do {                                                            \
 387         if (!(obd)) {                                           \
 388                 CERROR("NULL device\n");                        \
 389                 RETURN(-ENODEV);                                \
 390         }                                                       \
 391 } while (0)
 392
 393 /* ensure obd_setup and !obd_stopping */
 394 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 395 do {                                                            \
 396         OBD_CHECK_DEV(obd);                                     \
 397         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 398                 CERROR("Device %d not setup\n",                 \
 399                        (obd)->obd_minor);                       \
 400                 RETURN(-ENODEV);                                \
 401         }                                                       \
 402 } while (0)
 403
 404
 405 #ifdef CONFIG_PROC_FS
 406 #define OBD_COUNTER_OFFSET(op)                                                 \
 407         ((offsetof(struct obd_ops, o_ ## op) -                                 \
 408           offsetof(struct obd_ops, o_iocontrol))                               \
 409          / sizeof(((struct obd_ops *)NULL)->o_iocontrol))
 410
 411 /* The '- 1' below is for o_owner. */
 412 #define NUM_OBD_STATS                                                          \
 413         (sizeof(struct obd_ops) /                                              \
 414          sizeof(((struct obd_ops *)NULL)->o_iocontrol) - 1)
 415
 416 #define OBD_COUNTER_INCREMENT(obd, op)                                         \
 417         lprocfs_counter_incr((obd)->obd_stats,                                 \
 418                              (obd)->obd_cntr_base + OBD_COUNTER_OFFSET(op))
 419
 420 #define EXP_COUNTER_INCREMENT(exp, op)                                         \
 421         do {                                                                   \
 422                 unsigned int _off;                                             \
 423                 _off = (exp)->exp_obd->obd_cntr_base + OBD_COUNTER_OFFSET(op); \
 424                 lprocfs_counter_incr((exp)->exp_obd->obd_stats, _off);         \
 425                 if ((exp)->exp_obd->obd_uses_nid_stats &&                      \
 426                     (exp)->exp_nid_stats != NULL)                              \
 427                         lprocfs_counter_incr((exp)->exp_nid_stats->nid_stats,  \
 428                                              _off);                            \
 429         } while (0)
 430
 431 #define _MD_COUNTER_OFFSET(m_op)                                               \
 432         ((offsetof(struct md_ops, m_op) -                                      \
 433           offsetof(struct md_ops, MD_STATS_FIRST_OP)) /                        \
 434          sizeof(((struct md_ops *)NULL)->MD_STATS_FIRST_OP))
 435
 436 #define MD_COUNTER_OFFSET(op) _MD_COUNTER_OFFSET(m_ ## op)
 437
 438 #define NUM_MD_STATS                                                           \
 439         (_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) -                                \
 440          _MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) + 1)
 441
 442 /* Note that we only increment md counters for ops whose offset is less
 443  * than NUM_MD_STATS. This is explained in a comment in the definition
 444  * of struct md_ops. */
 445 #define EXP_MD_COUNTER_INCREMENT(exp, op)                                      \
 446         do {                                                                   \
 447                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS)                      \
 448                         lprocfs_counter_incr((exp)->exp_obd->obd_md_stats,     \
 449                                         (exp)->exp_obd->obd_md_cntr_base +     \
 450                                         MD_COUNTER_OFFSET(op));                \
 451         } while (0)
 452
 453 #else
 454 #define OBD_COUNTER_OFFSET(op)
 455 #define OBD_COUNTER_INCREMENT(obd, op)
 456 #define EXP_COUNTER_INCREMENT(exp, op)
 457 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 458 #endif
 459
 460 static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
 461 {
 462         /* Always add in ldlm_stats */
 463         tmp->nid_ldlm_stats =
 464                 lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC,
 465                                     LPROCFS_STATS_FLAG_NOPERCPU);
 466         if (tmp->nid_ldlm_stats == NULL)
 467                 return -ENOMEM;
 468
 469         lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
 470
 471         return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
 472                                       tmp->nid_ldlm_stats);
 473 }
 474
 475 static inline int exp_check_ops(struct obd_export *exp)
 476 {
 477         if (exp == NULL) {
 478                 RETURN(-ENODEV);
 479         }
 480         if (exp->exp_obd == NULL || !exp->exp_obd->obd_type) {
 481                 RETURN(-EOPNOTSUPP);
 482         }
 483         RETURN(0);
 484 }
 485
 486 static inline int class_devno_max(void)
 487 {
 488         return MAX_OBD_DEVICES;
 489 }
 490
 491 static inline int obd_get_info(const struct lu_env *env, struct obd_export *exp,
 492                                __u32 keylen, void *key,
 493                                __u32 *vallen, void *val)
 494 {
 495         int rc;
 496         ENTRY;
 497
 498         rc = exp_check_ops(exp);
 499         if (rc)
 500                 RETURN(rc);
 501
 502         if (!exp->exp_obd->obd_type->typ_dt_ops->o_get_info) {
 503                 CERROR("%s: no %s operation\n",
 504                        (exp)->exp_obd->obd_name, __func__);
 505                 RETURN(-ENOTSUPP);
 506         }
 507         EXP_COUNTER_INCREMENT(exp, get_info);
 508
 509         rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val);
 510         RETURN(rc);
 511 }
 512
 513 static inline int obd_set_info_async(const struct lu_env *env,
 514                                      struct obd_export *exp,
 515                                      __u32 keylen, void *key,
 516                                      __u32 vallen, void *val,
 517                                      struct ptlrpc_request_set *set)
 518 {
 519         int rc;
 520         ENTRY;
 521
 522         rc = exp_check_ops(exp);
 523         if (rc)
 524                 RETURN(rc);
 525
 526         if (!exp->exp_obd->obd_type->typ_dt_ops->o_set_info_async) {
 527                 CERROR("%s: no %s operation\n",
 528                        (exp)->exp_obd->obd_name, __func__);
 529                 RETURN(-ENOTSUPP);
 530         }
 531         EXP_COUNTER_INCREMENT(exp, set_info_async);
 532
 533         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 534                                                val, set);
 535         RETURN(rc);
 536 }
 537
 538 /*
 539  * obd-lu integration.
 540  *
 541  * Functionality is being moved into new lu_device-based layering, but some
 542  * pieces of configuration process are still based on obd devices.
 543  *
 544  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 545  * subsume ->o_setup() methods of obd devices they replace. The same for
 546  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 547  * result, obd_setup() and obd_process_config() branch and call one XOR
 548  * another.
 549  *
 550  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 551  * lu_device_type_operations::ldto_device_free() fully implement the
 552  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 553  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 554  */
 555 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 556 {
 557         int rc;
 558         struct lu_device_type *ldt = obd->obd_type->typ_lu;
 559         struct lu_device *d;
 560
 561         ENTRY;
 562
 563         if (ldt != NULL) {
 564                 struct lu_context  session_ctx;
 565                 struct lu_env env;
 566                 lu_context_init(&session_ctx, LCT_SESSION | LCT_SERVER_SESSION);
 567                 session_ctx.lc_thread = NULL;
 568                 lu_context_enter(&session_ctx);
 569
 570                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 571                 if (rc == 0) {
 572                         env.le_ses = &session_ctx;
 573                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 574                         lu_env_fini(&env);
 575                         if (!IS_ERR(d)) {
 576                                 obd->obd_lu_dev = d;
 577                                 d->ld_obd = obd;
 578                                 rc = 0;
 579                         } else
 580                                 rc = PTR_ERR(d);
 581                 }
 582                 lu_context_exit(&session_ctx);
 583                 lu_context_fini(&session_ctx);
 584
 585         } else {
 586                 if (!obd->obd_type->typ_dt_ops->o_setup) {
 587                         CERROR("%s: no %s operation\n", obd->obd_name,
 588                                __func__);
 589                         RETURN(-EOPNOTSUPP);
 590                 }
 591                 OBD_COUNTER_INCREMENT(obd, setup);
 592                 rc = OBP(obd, setup)(obd, cfg);
 593         }
 594         RETURN(rc);
 595 }
 596
 597 static inline int obd_precleanup(struct obd_device *obd)
 598 {
 599         int rc;
 600         struct lu_device_type *ldt = obd->obd_type->typ_lu;
 601         struct lu_device *d = obd->obd_lu_dev;
 602
 603         ENTRY;
 604
 605         if (ldt != NULL && d != NULL) {
 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         if (!obd->obd_type->typ_dt_ops->o_precleanup)
 616                 RETURN(0);
 617
 618         OBD_COUNTER_INCREMENT(obd, precleanup);
 619
 620         rc = OBP(obd, precleanup)(obd);
 621         RETURN(rc);
 622 }
 623
 624 static inline int obd_cleanup(struct obd_device *obd)
 625 {
 626         int rc;
 627         struct lu_device_type *ldt = obd->obd_type->typ_lu;
 628         struct lu_device *d = obd->obd_lu_dev;
 629
 630         ENTRY;
 631         if (ldt != NULL && d != NULL) {
 632                 struct lu_env env;
 633
 634                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 635                 if (rc == 0) {
 636                         ldt->ldt_ops->ldto_device_free(&env, d);
 637                         lu_env_fini(&env);
 638                         obd->obd_lu_dev = NULL;
 639                 }
 640         }
 641         if (!obd->obd_type->typ_dt_ops->o_cleanup)
 642                 RETURN(-EOPNOTSUPP);
 643
 644         OBD_COUNTER_INCREMENT(obd, cleanup);
 645
 646         rc = OBP(obd, cleanup)(obd);
 647         RETURN(rc);
 648 }
 649
 650 static inline void obd_cleanup_client_import(struct obd_device *obd)
 651 {
 652         ENTRY;
 653
 654         /* If we set up but never connected, the
 655            client import will not have been cleaned. */
 656         down_write(&obd->u.cli.cl_sem);
 657         if (obd->u.cli.cl_import) {
 658                 struct obd_import *imp;
 659                 imp = obd->u.cli.cl_import;
 660                 CDEBUG(D_CONFIG, "%s: client import never connected\n",
 661                        obd->obd_name);
 662                 ptlrpc_invalidate_import(imp);
 663                 client_destroy_import(imp);
 664                 obd->u.cli.cl_import = NULL;
 665         }
 666         up_write(&obd->u.cli.cl_sem);
 667
 668         EXIT;
 669 }
 670
 671 static inline int obd_process_config(struct obd_device *obd, int datalen,
 672                                      void *data)
 673 {
 674         int rc;
 675         struct lu_device_type *ldt = obd->obd_type->typ_lu;
 676         struct lu_device *d = obd->obd_lu_dev;
 677
 678         ENTRY;
 679
 680         obd->obd_process_conf = 1;
 681         if (ldt != NULL && d != NULL) {
 682                 struct lu_env env;
 683
 684                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 685                 if (rc == 0) {
 686                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 687                         lu_env_fini(&env);
 688                 }
 689         } else {
 690                 if (!obd->obd_type->typ_dt_ops->o_process_config) {
 691                         CERROR("%s: no %s operation\n",
 692                                obd->obd_name, __func__);
 693                         RETURN(-EOPNOTSUPP);
 694                 }
 695                 rc = OBP(obd, process_config)(obd, datalen, data);
 696         }
 697         OBD_COUNTER_INCREMENT(obd, process_config);
 698         obd->obd_process_conf = 0;
 699
 700         RETURN(rc);
 701 }
 702
 703 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 704                              struct obdo *obdo)
 705 {
 706         int rc;
 707         ENTRY;
 708
 709         rc = exp_check_ops(exp);
 710         if (rc)
 711                 RETURN(rc);
 712
 713         if (!exp->exp_obd->obd_type->typ_dt_ops->o_create) {
 714                 CERROR("%s: no %s operation\n",
 715                        (exp)->exp_obd->obd_name, __func__);
 716                 RETURN(-ENOTSUPP);
 717         }
 718         EXP_COUNTER_INCREMENT(exp, create);
 719
 720         rc = OBP(exp->exp_obd, create)(env, exp, obdo);
 721         RETURN(rc);
 722 }
 723
 724 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 725                               struct obdo *obdo)
 726 {
 727         int rc;
 728         ENTRY;
 729
 730         rc = exp_check_ops(exp);
 731         if (rc)
 732                 RETURN(rc);
 733
 734         if (!exp->exp_obd->obd_type->typ_dt_ops->o_destroy) {
 735                 CERROR("%s: no %s operation\n",
 736                        (exp)->exp_obd->obd_name, __func__);
 737                 RETURN(-ENOTSUPP);
 738         }
 739         EXP_COUNTER_INCREMENT(exp, destroy);
 740
 741         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo);
 742         RETURN(rc);
 743 }
 744
 745 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 746                               struct obdo *oa)
 747 {
 748         int rc;
 749
 750         ENTRY;
 751         rc = exp_check_ops(exp);
 752         if (rc)
 753                 RETURN(rc);
 754
 755         if (!exp->exp_obd->obd_type->typ_dt_ops->o_getattr) {
 756                 CERROR("%s: no %s operation\n",
 757                        (exp)->exp_obd->obd_name, __func__);
 758                 RETURN(-ENOTSUPP);
 759         }
 760         EXP_COUNTER_INCREMENT(exp, getattr);
 761         rc = OBP(exp->exp_obd, getattr)(env, exp, oa);
 762
 763         RETURN(rc);
 764 }
 765
 766 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 767                               struct obdo *oa)
 768 {
 769         int rc;
 770
 771         ENTRY;
 772         rc = exp_check_ops(exp);
 773         if (rc)
 774                 RETURN(rc);
 775
 776         if (!exp->exp_obd->obd_type->typ_dt_ops->o_setattr) {
 777                 CERROR("%s: no %s operation\n",
 778                        (exp)->exp_obd->obd_name, __func__);
 779                 RETURN(-ENOTSUPP);
 780         }
 781         EXP_COUNTER_INCREMENT(exp, setattr);
 782         rc = OBP(exp->exp_obd, setattr)(env, exp, oa);
 783
 784         RETURN(rc);
 785 }
 786
 787 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 788                                int priority)
 789 {
 790         struct obd_device *obd = imp->imp_obd;
 791         int rc;
 792         ENTRY;
 793
 794         OBD_CHECK_DEV_ACTIVE(obd);
 795         if (!obd->obd_type || !obd->obd_type->typ_dt_ops->o_add_conn) {
 796                 CERROR("%s: no %s operation\n", obd->obd_name, __func__);
 797                 RETURN(-EOPNOTSUPP);
 798         }
 799         OBD_COUNTER_INCREMENT(obd, add_conn);
 800
 801         rc = OBP(obd, add_conn)(imp, uuid, priority);
 802         RETURN(rc);
 803 }
 804
 805 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 806 {
 807         struct obd_device *obd = imp->imp_obd;
 808         int rc;
 809         ENTRY;
 810
 811         OBD_CHECK_DEV_ACTIVE(obd);
 812         if (!obd->obd_type || !obd->obd_type->typ_dt_ops->o_del_conn) {
 813                 CERROR("%s: no %s operation\n", obd->obd_name, __func__);
 814                 RETURN(-EOPNOTSUPP);
 815         }
 816         OBD_COUNTER_INCREMENT(obd, del_conn);
 817
 818         rc = OBP(obd, del_conn)(imp, uuid);
 819         RETURN(rc);
 820 }
 821
 822 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 823 {
 824         struct obd_uuid *uuid;
 825         ENTRY;
 826
 827         if (!exp->exp_obd->obd_type ||
 828             !exp->exp_obd->obd_type->typ_dt_ops->o_get_uuid)
 829                 RETURN(NULL);
 830
 831         EXP_COUNTER_INCREMENT(exp, get_uuid);
 832
 833         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 834         RETURN(uuid);
 835 }
 836
 837 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 838  * @param exp New export handle
 839  * @param d Connect data, supported flags are set, flags also understood
 840  *    by obd are returned.
 841  */
 842 static inline int obd_connect(const struct lu_env *env,
 843                               struct obd_export **exp,struct obd_device *obd,
 844                               struct obd_uuid *cluuid,
 845                               struct obd_connect_data *data,
 846                               void *localdata)
 847 {
 848         int rc;
 849         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 850                                                    * check */
 851         ENTRY;
 852
 853         OBD_CHECK_DEV_ACTIVE(obd);
 854         if (!obd->obd_type || !obd->obd_type->typ_dt_ops->o_connect) {
 855                 CERROR("%s: no %s operation\n", obd->obd_name, __func__);
 856                 RETURN(-EOPNOTSUPP);
 857         }
 858         OBD_COUNTER_INCREMENT(obd, connect);
 859
 860         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 861         /* check that only subset is granted */
 862         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
 863                                     data->ocd_connect_flags));
 864         RETURN(rc);
 865 }
 866
 867 static inline int obd_reconnect(const struct lu_env *env,
 868                                 struct obd_export *exp,
 869                                 struct obd_device *obd,
 870                                 struct obd_uuid *cluuid,
 871                                 struct obd_connect_data *d,
 872                                 void *localdata)
 873 {
 874         int rc;
 875         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
 876                                                    * check */
 877
 878         ENTRY;
 879
 880         OBD_CHECK_DEV_ACTIVE(obd);
 881         if (!obd->obd_type || !obd->obd_type->typ_dt_ops->o_reconnect)
 882                 RETURN(0);
 883
 884         OBD_COUNTER_INCREMENT(obd, reconnect);
 885
 886         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 887         /* check that only subset is granted */
 888         LASSERT(ergo(d != NULL,
 889                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 890         RETURN(rc);
 891 }
 892
 893 static inline int obd_disconnect(struct obd_export *exp)
 894 {
 895         int rc;
 896         ENTRY;
 897         rc = exp_check_ops(exp);
 898         if (rc)
 899                 RETURN(rc);
 900
 901         if (!exp->exp_obd->obd_type->typ_dt_ops->o_disconnect) {
 902                 CERROR("%s: no %s operation\n",
 903                        (exp)->exp_obd->obd_name, __func__);
 904                 RETURN(-ENOTSUPP);
 905         }
 906         EXP_COUNTER_INCREMENT(exp, disconnect);
 907
 908         rc = OBP(exp->exp_obd, disconnect)(exp);
 909         RETURN(rc);
 910 }
 911
 912 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
 913                                enum lu_cli_type type)
 914 {
 915         int rc;
 916         ENTRY;
 917
 918         if (!obd->obd_type || !obd->obd_type->typ_dt_ops->o_fid_init)
 919                 RETURN(0);
 920         OBD_COUNTER_INCREMENT(obd, fid_init);
 921
 922         rc = OBP(obd, fid_init)(obd, exp, type);
 923         RETURN(rc);
 924 }
 925
 926 static inline int obd_fid_fini(struct obd_device *obd)
 927 {
 928         int rc;
 929         ENTRY;
 930         if (!obd->obd_type || !obd->obd_type->typ_dt_ops->o_fid_fini)
 931                 RETURN(0);
 932         OBD_COUNTER_INCREMENT(obd, fid_fini);
 933
 934         rc = OBP(obd, fid_fini)(obd);
 935         RETURN(rc);
 936 }
 937
 938 static inline int obd_fid_alloc(const struct lu_env *env,
 939                                 struct obd_export *exp,
 940                                 struct lu_fid *fid,
 941                                 struct md_op_data *op_data)
 942 {
 943         int rc;
 944         ENTRY;
 945         rc = exp_check_ops(exp);
 946         if (rc)
 947                 RETURN(rc);
 948
 949         if (!exp->exp_obd->obd_type->typ_dt_ops->o_fid_alloc) {
 950                 CERROR("%s: no %s operation\n",
 951                        (exp)->exp_obd->obd_name, __func__);
 952                 RETURN(-ENOTSUPP);
 953         }
 954         EXP_COUNTER_INCREMENT(exp, fid_alloc);
 955
 956         rc = OBP(exp->exp_obd, fid_alloc)(env, exp, fid, op_data);
 957         RETURN(rc);
 958 }
 959
 960 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
 961 {
 962         int rc;
 963         ENTRY;
 964
 965         if (!exp->exp_obd->obd_type ||
 966             !exp->exp_obd->obd_type->typ_dt_ops->o_ping)
 967                 RETURN(0);
 968
 969         EXP_COUNTER_INCREMENT(exp, ping);
 970
 971         rc = OBP(exp->exp_obd, ping)(env, exp);
 972         RETURN(rc);
 973 }
 974
 975 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
 976 {
 977         int rc;
 978         ENTRY;
 979
 980         if (!obd->obd_type || !obd->obd_type->typ_dt_ops->o_pool_new) {
 981                 CERROR("%s: no %s operation\n", obd->obd_name, __func__);
 982                 RETURN(-EOPNOTSUPP);
 983         }
 984         OBD_COUNTER_INCREMENT(obd, pool_new);
 985
 986         rc = OBP(obd, pool_new)(obd, poolname);
 987         RETURN(rc);
 988 }
 989
 990 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
 991 {
 992         int rc;
 993         ENTRY;
 994         if (!obd->obd_type || !obd->obd_type->typ_dt_ops->o_pool_del) {
 995                 CERROR("%s: no %s operation\n", obd->obd_name, __func__);
 996                 RETURN(-EOPNOTSUPP);
 997         }
 998         OBD_COUNTER_INCREMENT(obd, pool_del);
 999
1000         rc = OBP(obd, pool_del)(obd, poolname);
1001         RETURN(rc);
1002 }
1003
1004 static inline int obd_pool_add(struct obd_device *obd, char *poolname,
1005                                char *ostname)
1006 {
1007         int rc;
1008         ENTRY;
1009
1010         if (!obd->obd_type || !obd->obd_type->typ_dt_ops->o_pool_add) {
1011                 CERROR("%s: no %s operation\n", obd->obd_name, __func__);
1012                 RETURN(-EOPNOTSUPP);
1013         }
1014         OBD_COUNTER_INCREMENT(obd, pool_add);
1015
1016         rc = OBP(obd, pool_add)(obd, poolname, ostname);
1017         RETURN(rc);
1018 }
1019
1020 static inline int obd_pool_rem(struct obd_device *obd, char *poolname,
1021                                char *ostname)
1022 {
1023         int rc;
1024
1025         ENTRY;
1026         if (!obd->obd_type || !obd->obd_type->typ_dt_ops->o_pool_rem) {
1027                 CERROR("%s: no %s operation\n", obd->obd_name, __func__);
1028                 RETURN(-EOPNOTSUPP);
1029         }
1030         OBD_COUNTER_INCREMENT(obd, pool_rem);
1031
1032         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
1033         RETURN(rc);
1034 }
1035
1036 static inline void obd_getref(struct obd_device *obd)
1037 {
1038         ENTRY;
1039         if (obd->obd_type && OBP(obd, getref)) {
1040                 OBD_COUNTER_INCREMENT(obd, getref);
1041                 OBP(obd, getref)(obd);
1042         }
1043         EXIT;
1044 }
1045
1046 static inline void obd_putref(struct obd_device *obd)
1047 {
1048         ENTRY;
1049         if (obd->obd_type && OBP(obd, putref)) {
1050                 OBD_COUNTER_INCREMENT(obd, putref);
1051                 OBP(obd, putref)(obd);
1052         }
1053         EXIT;
1054 }
1055
1056 static inline int obd_init_export(struct obd_export *exp)
1057 {
1058         int rc = 0;
1059
1060         ENTRY;
1061         if (exp->exp_obd != NULL && exp->exp_obd->obd_type &&
1062             OBP((exp)->exp_obd, init_export))
1063                 rc = OBP(exp->exp_obd, init_export)(exp);
1064         RETURN(rc);
1065 }
1066
1067 static inline int obd_destroy_export(struct obd_export *exp)
1068 {
1069         ENTRY;
1070         if (exp->exp_obd != NULL && exp->exp_obd->obd_type &&
1071             OBP(exp->exp_obd, destroy_export))
1072                 OBP(exp->exp_obd, destroy_export)(exp);
1073         RETURN(0);
1074 }
1075
1076 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1077  * If the cache is older than @max_age we will get a new value from the
1078  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1079 static inline int obd_statfs_async(struct obd_export *exp,
1080                                    struct obd_info *oinfo,
1081                                    __u64 max_age,
1082                                    struct ptlrpc_request_set *rqset)
1083 {
1084         int rc = 0;
1085         struct obd_device *obd;
1086
1087         ENTRY;
1088
1089         if (exp == NULL || exp->exp_obd == NULL)
1090                 RETURN(-EINVAL);
1091
1092         obd = exp->exp_obd;
1093         if (!obd->obd_type || !obd->obd_type->typ_dt_ops->o_statfs) {
1094                 CERROR("%s: no %s operation\n", obd->obd_name, __func__);
1095                 RETURN(-EOPNOTSUPP);
1096         }
1097         OBD_COUNTER_INCREMENT(obd, statfs);
1098
1099         CDEBUG(D_SUPER, "%s: osfs %p age %llu, max_age %llu\n",
1100                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1101         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1102                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1103         } else {
1104                 CDEBUG(D_SUPER,
1105                        "%s: use %p cache blocks %llu/%llu objects %llu/%llu\n",
1106                        obd->obd_name, &obd->obd_osfs,
1107                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1108                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1109                 spin_lock(&obd->obd_osfs_lock);
1110                 memcpy(oinfo->oi_osfs, &obd->obd_osfs,
1111                        sizeof(*oinfo->oi_osfs));
1112                 spin_unlock(&obd->obd_osfs_lock);
1113                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1114                 if (oinfo->oi_cb_up)
1115                         oinfo->oi_cb_up(oinfo, 0);
1116         }
1117         RETURN(rc);
1118 }
1119
1120 static inline int obd_statfs_rqset(struct obd_export *exp,
1121                                    struct obd_statfs *osfs, __u64 max_age,
1122                                    __u32 flags)
1123 {
1124         struct ptlrpc_request_set *set = NULL;
1125         struct obd_info oinfo = {
1126                 .oi_osfs = osfs,
1127                 .oi_flags = flags,
1128         };
1129         int rc = 0;
1130
1131         ENTRY;
1132
1133         set = ptlrpc_prep_set();
1134         if (set == NULL)
1135                 RETURN(-ENOMEM);
1136
1137         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1138         if (rc == 0)
1139                 rc = ptlrpc_set_wait(set);
1140
1141         ptlrpc_set_destroy(set);
1142
1143         RETURN(rc);
1144 }
1145
1146 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1147  * If the cache is older than @max_age we will get a new value from the
1148  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1149 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1150                              struct obd_statfs *osfs, __u64 max_age,
1151                              __u32 flags)
1152 {
1153         int rc = 0;
1154         struct obd_device *obd = exp->exp_obd;
1155         ENTRY;
1156
1157         if (obd == NULL)
1158                 RETURN(-EINVAL);
1159
1160         if (!obd->obd_type || !obd->obd_type->typ_dt_ops->o_statfs) {
1161                 CERROR("%s: no %s operation\n", obd->obd_name, __func__);
1162                 RETURN(-EOPNOTSUPP);
1163         }
1164         OBD_COUNTER_INCREMENT(obd, statfs);
1165
1166         CDEBUG(D_SUPER, "osfs %llu, max_age %llu\n",
1167                obd->obd_osfs_age, max_age);
1168         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1169                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1170                 if (rc == 0) {
1171                         spin_lock(&obd->obd_osfs_lock);
1172                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1173                         obd->obd_osfs_age = cfs_time_current_64();
1174                         spin_unlock(&obd->obd_osfs_lock);
1175                 }
1176         } else {
1177                 CDEBUG(D_SUPER, "%s: use %p cache blocks %llu/%llu"
1178                        " objects %llu/%llu\n",
1179                        obd->obd_name, &obd->obd_osfs,
1180                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1181                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1182                 spin_lock(&obd->obd_osfs_lock);
1183                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1184                 spin_unlock(&obd->obd_osfs_lock);
1185         }
1186         RETURN(rc);
1187 }
1188
1189 static inline int obd_preprw(const struct lu_env *env, int cmd,
1190                              struct obd_export *exp, struct obdo *oa,
1191                              int objcount, struct obd_ioobj *obj,
1192                              struct niobuf_remote *remote, int *pages,
1193                              struct niobuf_local *local)
1194 {
1195         int rc;
1196
1197         ENTRY;
1198
1199         rc = exp_check_ops(exp);
1200         if (rc)
1201                 RETURN(rc);
1202
1203         if (!exp->exp_obd->obd_type->typ_dt_ops->o_preprw) {
1204                 CERROR("%s: no %s operation\n",
1205                        (exp)->exp_obd->obd_name, __func__);
1206                 RETURN(-ENOTSUPP);
1207         }
1208         EXP_COUNTER_INCREMENT(exp, preprw);
1209         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1210                                        pages, local);
1211
1212         RETURN(rc);
1213 }
1214
1215 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1216                                struct obd_export *exp, struct obdo *oa,
1217                                int objcount, struct obd_ioobj *obj,
1218                                struct niobuf_remote *rnb, int pages,
1219                                struct niobuf_local *local, int rc)
1220 {
1221         ENTRY;
1222
1223         rc = exp_check_ops(exp);
1224         if (rc)
1225                 RETURN(rc);
1226
1227         if (!exp->exp_obd->obd_type->typ_dt_ops->o_commitrw) {
1228                 CERROR("%s: no %s operation\n",
1229                        (exp)->exp_obd->obd_name, __func__);
1230                 RETURN(-ENOTSUPP);
1231         }
1232         EXP_COUNTER_INCREMENT(exp, commitrw);
1233         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1234                                          rnb, pages, local, rc);
1235
1236         RETURN(rc);
1237 }
1238
1239 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1240                                 int len, void *karg, void __user *uarg)
1241 {
1242         int rc;
1243         ENTRY;
1244
1245         rc = exp_check_ops(exp);
1246         if (rc)
1247                 RETURN(rc);
1248
1249         if (!exp->exp_obd->obd_type->typ_dt_ops->o_iocontrol) {
1250                 CERROR("%s: no %s operation\n",
1251                        (exp)->exp_obd->obd_name, __func__);
1252                 RETURN(-ENOTSUPP);
1253         }
1254         EXP_COUNTER_INCREMENT(exp, iocontrol);
1255
1256         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1257         RETURN(rc);
1258 }
1259
1260 static inline void obd_import_event(struct obd_device *obd,
1261                                     struct obd_import *imp,
1262                                     enum obd_import_event event)
1263 {
1264         ENTRY;
1265         if (!obd) {
1266                 CERROR("NULL device\n");
1267                 EXIT;
1268                 return;
1269         }
1270         if (obd->obd_set_up && OBP(obd, import_event)) {
1271                 OBD_COUNTER_INCREMENT(obd, import_event);
1272                 OBP(obd, import_event)(obd, imp, event);
1273         }
1274         EXIT;
1275 }
1276
1277 static inline int obd_notify(struct obd_device *obd,
1278                              struct obd_device *watched,
1279                              enum obd_notify_event ev)
1280 {
1281         int rc;
1282         ENTRY;
1283         OBD_CHECK_DEV(obd);
1284
1285         if (!obd->obd_set_up) {
1286                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1287                 RETURN(-EINVAL);
1288         }
1289
1290         if (!OBP(obd, notify)) {
1291                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1292                 RETURN(-ENOSYS);
1293         }
1294
1295         OBD_COUNTER_INCREMENT(obd, notify);
1296         rc = OBP(obd, notify)(obd, watched, ev);
1297
1298         RETURN(rc);
1299 }
1300
1301 static inline int obd_notify_observer(struct obd_device *observer,
1302                                       struct obd_device *observed,
1303                                       enum obd_notify_event ev)
1304 {
1305         int rc = 0;
1306         int rc2 = 0;
1307         struct obd_notify_upcall *onu;
1308
1309         if (observer->obd_observer)
1310                 rc = obd_notify(observer->obd_observer, observed, ev);
1311
1312         /*
1313          * Also, call non-obd listener, if any
1314          */
1315         onu = &observer->obd_upcall;
1316         if (onu->onu_upcall != NULL)
1317                 rc2 = onu->onu_upcall(observer, observed, ev, onu->onu_owner);
1318
1319         return rc ? rc : rc2;
1320 }
1321
1322 static inline int obd_quotactl(struct obd_export *exp,
1323                                struct obd_quotactl *oqctl)
1324 {
1325         int rc;
1326         ENTRY;
1327
1328         rc = exp_check_ops(exp);
1329         if (rc)
1330                 RETURN(rc);
1331
1332         if (!exp->exp_obd->obd_type->typ_dt_ops->o_quotactl) {
1333                 CERROR("%s: no %s operation\n",
1334                        (exp)->exp_obd->obd_name, __func__);
1335                 RETURN(-ENOTSUPP);
1336         }
1337         EXP_COUNTER_INCREMENT(exp, quotactl);
1338
1339         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1340         RETURN(rc);
1341 }
1342
1343 static inline int obd_health_check(const struct lu_env *env,
1344                                    struct obd_device *obd)
1345 {
1346         /* returns: 0 on healthy
1347          *         >0 on unhealthy + reason code/flag
1348          *            however the only suppored reason == 1 right now
1349          *            We'll need to define some better reasons
1350          *            or flags in the future.
1351          *         <0 on error
1352          */
1353         int rc;
1354
1355         ENTRY;
1356
1357         /* NULL method is normal here */
1358         if (obd == NULL || !obd->obd_type) {
1359                 CERROR("cleaned up obd\n");
1360                 RETURN(-EOPNOTSUPP);
1361         }
1362         if (!obd->obd_set_up || obd->obd_stopping)
1363                 RETURN(0);
1364         if (!OBP(obd, health_check))
1365                 RETURN(0);
1366
1367         rc = OBP(obd, health_check)(env, obd);
1368         RETURN(rc);
1369 }
1370
1371 static inline int obd_register_observer(struct obd_device *obd,
1372                                         struct obd_device *observer)
1373 {
1374         ENTRY;
1375         OBD_CHECK_DEV(obd);
1376         down_write(&obd->obd_observer_link_sem);
1377         if (obd->obd_observer && observer) {
1378                 up_write(&obd->obd_observer_link_sem);
1379                 RETURN(-EALREADY);
1380         }
1381         obd->obd_observer = observer;
1382         up_write(&obd->obd_observer_link_sem);
1383         RETURN(0);
1384 }
1385
1386 /* metadata helpers */
1387 static inline int md_get_root(struct obd_export *exp, const char *fileset,
1388                               struct lu_fid *fid)
1389 {
1390         int rc;
1391
1392         ENTRY;
1393         rc = exp_check_ops(exp);
1394         if (rc)
1395                 RETURN(rc);
1396         EXP_MD_COUNTER_INCREMENT(exp, get_root);
1397         rc = MDP(exp->exp_obd, get_root)(exp, fileset, fid);
1398
1399         RETURN(rc);
1400 }
1401
1402 static inline int md_getattr(struct obd_export *exp,
1403                              struct md_op_data *op_data,
1404                              struct ptlrpc_request **request)
1405 {
1406         int rc;
1407
1408         ENTRY;
1409         rc = exp_check_ops(exp);
1410         if (rc)
1411                 RETURN(rc);
1412         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1413         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1414         RETURN(rc);
1415 }
1416
1417 static inline int md_null_inode(struct obd_export *exp,
1418                                    const struct lu_fid *fid)
1419 {
1420         int rc;
1421         ENTRY;
1422         rc = exp_check_ops(exp);
1423         if (rc)
1424                 RETURN(rc);
1425         EXP_MD_COUNTER_INCREMENT(exp, null_inode);
1426         rc = MDP(exp->exp_obd, null_inode)(exp, fid);
1427         RETURN(rc);
1428 }
1429
1430 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1431                            struct md_open_data *mod,
1432                            struct ptlrpc_request **request)
1433 {
1434         int rc;
1435         ENTRY;
1436         rc = exp_check_ops(exp);
1437         if (rc)
1438                 RETURN(rc);
1439         EXP_MD_COUNTER_INCREMENT(exp, close);
1440         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1441         RETURN(rc);
1442 }
1443
1444 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1445                             const void *data, size_t datalen, umode_t mode,
1446                             uid_t uid, gid_t gid, cfs_cap_t cap_effective,
1447                             __u64 rdev, struct ptlrpc_request **request)
1448 {
1449         int rc;
1450         ENTRY;
1451         rc = exp_check_ops(exp);
1452         if (rc)
1453                 RETURN(rc);
1454         EXP_MD_COUNTER_INCREMENT(exp, create);
1455         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1456                                        uid, gid, cap_effective, rdev, request);
1457         RETURN(rc);
1458 }
1459
1460 static inline int md_enqueue(struct obd_export *exp,
1461                              struct ldlm_enqueue_info *einfo,
1462                              const union ldlm_policy_data *policy,
1463                              struct md_op_data *op_data,
1464                              struct lustre_handle *lockh,
1465                              __u64 extra_lock_flags)
1466 {
1467         int rc;
1468         ENTRY;
1469         rc = exp_check_ops(exp);
1470         if (rc)
1471                 RETURN(rc);
1472         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1473         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, policy, op_data, lockh,
1474                                         extra_lock_flags);
1475         RETURN(rc);
1476 }
1477
1478 static inline int md_getattr_name(struct obd_export *exp,
1479                                   struct md_op_data *op_data,
1480                                   struct ptlrpc_request **request)
1481 {
1482         int rc;
1483         ENTRY;
1484         rc = exp_check_ops(exp);
1485         if (rc)
1486                 RETURN(rc);
1487         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1488         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1489         RETURN(rc);
1490 }
1491
1492 static inline int md_intent_lock(struct obd_export *exp,
1493                                  struct md_op_data *op_data,
1494                                  struct lookup_intent *it,
1495                                  struct ptlrpc_request **reqp,
1496                                  ldlm_blocking_callback cb_blocking,
1497                                  __u64 extra_lock_flags)
1498 {
1499         int rc;
1500         ENTRY;
1501         rc = exp_check_ops(exp);
1502         if (rc)
1503                 RETURN(rc);
1504         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1505         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, it, reqp, cb_blocking,
1506                                             extra_lock_flags);
1507         RETURN(rc);
1508 }
1509
1510 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1511                           struct ptlrpc_request **request)
1512 {
1513         int rc;
1514         ENTRY;
1515         rc = exp_check_ops(exp);
1516         if (rc)
1517                 RETURN(rc);
1518         EXP_MD_COUNTER_INCREMENT(exp, link);
1519         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1520         RETURN(rc);
1521 }
1522
1523 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1524                             const char *old, size_t oldlen, const char *new,
1525                             size_t newlen, struct ptlrpc_request **request)
1526 {
1527         int rc;
1528         ENTRY;
1529         rc = exp_check_ops(exp);
1530         if (rc)
1531                 RETURN(rc);
1532
1533         EXP_MD_COUNTER_INCREMENT(exp, rename);
1534         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1535                                        newlen, request);
1536         RETURN(rc);
1537 }
1538
1539 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
1540                              void *ea, size_t ealen,
1541                              struct ptlrpc_request **request)
1542 {
1543         int rc;
1544         ENTRY;
1545         rc = exp_check_ops(exp);
1546         if (rc)
1547                 RETURN(rc);
1548
1549         EXP_MD_COUNTER_INCREMENT(exp, setattr);
1550         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen, request);
1551         RETURN(rc);
1552 }
1553
1554 static inline int md_fsync(struct obd_export *exp, const struct lu_fid *fid,
1555                            struct ptlrpc_request **request)
1556 {
1557         int rc;
1558
1559         ENTRY;
1560         rc = exp_check_ops(exp);
1561         if (rc)
1562                 RETURN(rc);
1563
1564         EXP_MD_COUNTER_INCREMENT(exp, fsync);
1565         rc = MDP(exp->exp_obd, fsync)(exp, fid, request);
1566
1567         RETURN(rc);
1568 }
1569
1570 /* FLR: resync mirrored files. */
1571 static inline int md_file_resync(struct obd_export *exp,
1572                                  struct md_op_data *data)
1573 {
1574         int rc;
1575
1576         ENTRY;
1577         rc = exp_check_ops(exp);
1578         if (rc)
1579                 RETURN(rc);
1580
1581         EXP_MD_COUNTER_INCREMENT(exp, file_resync);
1582         rc = MDP(exp->exp_obd, file_resync)(exp, data);
1583
1584         RETURN(rc);
1585 }
1586
1587 static inline int md_read_page(struct obd_export *exp,
1588                                struct md_op_data *op_data,
1589                                struct md_callback *cb_op,
1590                                __u64  hash_offset,
1591                                struct page **ppage)
1592 {
1593         int rc;
1594         ENTRY;
1595         rc = exp_check_ops(exp);
1596         if (rc)
1597                 RETURN(rc);
1598
1599         EXP_MD_COUNTER_INCREMENT(exp, read_page);
1600         rc = MDP(exp->exp_obd, read_page)(exp, op_data, cb_op, hash_offset,
1601                                           ppage);
1602         RETURN(rc);
1603 }
1604
1605 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
1606                             struct ptlrpc_request **request)
1607 {
1608         int rc;
1609         ENTRY;
1610         rc = exp_check_ops(exp);
1611         if (rc)
1612                 RETURN(rc);
1613
1614         EXP_MD_COUNTER_INCREMENT(exp, unlink);
1615         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
1616         RETURN(rc);
1617 }
1618
1619 static inline int md_get_lustre_md(struct obd_export *exp,
1620                                    struct ptlrpc_request *req,
1621                                    struct obd_export *dt_exp,
1622                                    struct obd_export *md_exp,
1623                                    struct lustre_md *md)
1624 {
1625         int rc;
1626         ENTRY;
1627         rc = exp_check_ops(exp);
1628         if (rc)
1629                 RETURN(rc);
1630
1631         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
1632         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
1633 }
1634
1635 static inline int md_free_lustre_md(struct obd_export *exp,
1636                                     struct lustre_md *md)
1637 {
1638         int rc;
1639         ENTRY;
1640         rc = exp_check_ops(exp);
1641         if (rc)
1642                 RETURN(rc);
1643         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
1644         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
1645 }
1646
1647 static inline int md_merge_attr(struct obd_export *exp,
1648                                 const struct lmv_stripe_md *lsm,
1649                                 struct cl_attr *attr,
1650                                 ldlm_blocking_callback cb)
1651 {
1652         int rc;
1653         ENTRY;
1654         rc = exp_check_ops(exp);
1655         if (rc)
1656                 RETURN(rc);
1657         EXP_MD_COUNTER_INCREMENT(exp, merge_attr);
1658         RETURN(MDP(exp->exp_obd, merge_attr)(exp, lsm, attr, cb));
1659 }
1660
1661 static inline int md_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1662                               u64 valid, const char *name,
1663                               const char *input, int input_size,
1664                               int output_size, int flags, __u32 suppgid,
1665                               struct ptlrpc_request **request)
1666 {
1667         int rc;
1668         ENTRY;
1669
1670         rc = exp_check_ops(exp);
1671         if (rc)
1672                 RETURN(rc);
1673         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
1674         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, valid, name, input,
1675                                            input_size, output_size, flags,
1676                                            suppgid, request));
1677 }
1678
1679 static inline int md_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1680                               u64 valid, const char *name,
1681                               const char *input, int input_size,
1682                               int output_size, int flags,
1683                               struct ptlrpc_request **request)
1684 {
1685         int rc;
1686         ENTRY;
1687         rc = exp_check_ops(exp);
1688         if (rc)
1689                 RETURN(rc);
1690         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
1691         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, valid, name, input,
1692                                            input_size, output_size, flags,
1693                                            request));
1694 }
1695
1696 static inline int md_set_open_replay_data(struct obd_export *exp,
1697                                           struct obd_client_handle *och,
1698                                           struct lookup_intent *it)
1699 {
1700         int rc;
1701         ENTRY;
1702         rc = exp_check_ops(exp);
1703         if (rc)
1704                 RETURN(rc);
1705         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
1706         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, it));
1707 }
1708
1709 static inline int md_clear_open_replay_data(struct obd_export *exp,
1710                                             struct obd_client_handle *och)
1711 {
1712         int rc;
1713         ENTRY;
1714         rc = exp_check_ops(exp);
1715         if (rc)
1716                 RETURN(rc);
1717         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
1718         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
1719 }
1720
1721 static inline int md_set_lock_data(struct obd_export *exp,
1722                                    const struct lustre_handle *lockh,
1723                                    void *data, __u64 *bits)
1724 {
1725         int rc;
1726         ENTRY;
1727         rc = exp_check_ops(exp);
1728         if (rc)
1729                 RETURN(rc);
1730         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
1731         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
1732 }
1733
1734 static inline
1735 int md_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
1736                      union ldlm_policy_data *policy, enum ldlm_mode mode,
1737                      enum ldlm_cancel_flags cancel_flags, void *opaque)
1738 {
1739         int rc;
1740         ENTRY;
1741
1742         rc = exp_check_ops(exp);
1743         if (rc)
1744                 RETURN(rc);
1745         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
1746
1747         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
1748                                               cancel_flags, opaque);
1749         RETURN(rc);
1750 }
1751
1752 static inline enum ldlm_mode md_lock_match(struct obd_export *exp, __u64 flags,
1753                                            const struct lu_fid *fid,
1754                                            enum ldlm_type type,
1755                                            union ldlm_policy_data *policy,
1756                                            enum ldlm_mode mode,
1757                                            struct lustre_handle *lockh)
1758 {
1759         int rc;
1760         ENTRY;
1761         rc = exp_check_ops(exp);
1762         if (rc)
1763                 RETURN(rc);
1764         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
1765         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
1766                                              policy, mode, lockh));
1767 }
1768
1769 static inline int md_init_ea_size(struct obd_export *exp, __u32 ea_size,
1770                                   __u32 def_ea_size)
1771 {
1772         int rc;
1773         ENTRY;
1774         rc = exp_check_ops(exp);
1775         if (rc)
1776                 RETURN(rc);
1777         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
1778         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, ea_size, def_ea_size));
1779 }
1780
1781 static inline int md_intent_getattr_async(struct obd_export *exp,
1782                                           struct md_enqueue_info *minfo)
1783 {
1784         int rc;
1785         ENTRY;
1786         rc = exp_check_ops(exp);
1787         if (rc)
1788                 RETURN(rc);
1789         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
1790         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo);
1791         RETURN(rc);
1792 }
1793
1794 static inline int md_revalidate_lock(struct obd_export *exp,
1795                                      struct lookup_intent *it,
1796                                      struct lu_fid *fid, __u64 *bits)
1797 {
1798         int rc;
1799         ENTRY;
1800         rc = exp_check_ops(exp);
1801         if (rc)
1802                 RETURN(rc);
1803         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
1804         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
1805         RETURN(rc);
1806 }
1807
1808 static inline int md_get_fid_from_lsm(struct obd_export *exp,
1809                                       const struct lmv_stripe_md *lsm,
1810                                       const char *name, int namelen,
1811                                       struct lu_fid *fid)
1812 {
1813         int rc;
1814         ENTRY;
1815         rc = exp_check_ops(exp);
1816         if (rc)
1817                 RETURN(rc);
1818         EXP_MD_COUNTER_INCREMENT(exp, get_fid_from_lsm);
1819         rc = MDP(exp->exp_obd, get_fid_from_lsm)(exp, lsm, name, namelen, fid);
1820         RETURN(rc);
1821 }
1822
1823
1824 /* Unpack an MD struct from disk to in-memory format.
1825  * Returns +ve size of unpacked MD (0 for free), or -ve error.
1826  *
1827  * If *plsm != NULL and lmm == NULL then *lsm will be freed.
1828  * If *plsm == NULL then it will be allocated.
1829  */
1830 static inline int md_unpackmd(struct obd_export *exp,
1831                               struct lmv_stripe_md **plsm,
1832                               const union lmv_mds_md *lmm, size_t lmm_size)
1833 {
1834         int rc;
1835         ENTRY;
1836         rc = exp_check_ops(exp);
1837         if (rc)
1838                 RETURN(rc);
1839         EXP_MD_COUNTER_INCREMENT(exp, unpackmd);
1840         rc = MDP(exp->exp_obd, unpackmd)(exp, plsm, lmm, lmm_size);
1841         RETURN(rc);
1842 }
1843
1844 /* OBD Metadata Support */
1845
1846 extern int obd_init_caches(void);
1847 extern void obd_cleanup_caches(void);
1848
1849 /* support routines */
1850 extern struct kmem_cache *obdo_cachep;
1851
1852 #define OBDO_ALLOC(ptr)                                                       \
1853 do {                                                                          \
1854         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, GFP_NOFS);             \
1855 } while(0)
1856
1857 #define OBDO_FREE(ptr)                                                        \
1858 do {                                                                          \
1859         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1860 } while(0)
1861
1862
1863 typedef int (*register_lwp_cb)(void *data);
1864
1865 struct lwp_register_item {
1866         struct obd_export **lri_exp;
1867         register_lwp_cb     lri_cb_func;
1868         void               *lri_cb_data;
1869         struct list_head    lri_list;
1870         atomic_t            lri_ref;
1871         char                lri_name[MTI_NAME_MAXLEN];
1872 };
1873
1874 /* I'm as embarrassed about this as you are.
1875  *
1876  * <shaver> // XXX do not look into _superhack with remaining eye
1877  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1878 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1879
1880 /* obd_mount.c */
1881 #ifdef HAVE_SERVER_SUPPORT
1882 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
1883                              register_lwp_cb cb_func, void *cb_data);
1884 void lustre_deregister_lwp_item(struct obd_export **exp);
1885 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx);
1886 void lustre_notify_lwp_list(struct obd_export *exp);
1887 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx);
1888 #endif /* HAVE_SERVER_SUPPORT */
1889 int lustre_register_fs(void);
1890 int lustre_unregister_fs(void);
1891 int lustre_check_exclusion(struct super_block *sb, char *svname);
1892
1893 /* sysctl.c */
1894 extern int obd_sysctl_init(void);
1895 extern void obd_sysctl_clean(void);
1896
1897 typedef __u8 class_uuid_t[16];
1898 static inline void class_uuid_unparse(class_uuid_t uu, struct obd_uuid *out)
1899 {
1900         snprintf(out->uuid, sizeof(out->uuid), "%02x%02x%02x%02x-%02x%02x-"
1901                  "%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
1902                  uu[14], uu[15], uu[12], uu[13], uu[10], uu[11], uu[8], uu[9],
1903                  uu[6], uu[7], uu[4], uu[5], uu[2], uu[3], uu[0], uu[1]);
1904 }
1905
1906 /* lustre_peer.c    */
1907 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
1908 int class_add_uuid(const char *uuid, __u64 nid);
1909 int class_del_uuid (const char *uuid);
1910 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
1911
1912 /* class_obd.c */
1913 extern char obd_jobid_node[];
1914
1915 /* prng.c */
1916 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
1917
1918 /* statfs_pack.c */
1919 struct kstatfs;
1920 void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
1921 void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);
1922
1923 /* root squash info */
1924 struct rw_semaphore;
1925 struct root_squash_info {
1926         uid_t                   rsi_uid;
1927         gid_t                   rsi_gid;
1928         struct list_head        rsi_nosquash_nids;
1929         struct rw_semaphore     rsi_sem;
1930 };
1931
1932 int server_name2index(const char *svname, __u32 *idx, const char **endptr);
1933
1934 /* linux-module.c */
1935 extern struct miscdevice obd_psdev;
1936 int obd_ioctl_getdata(char **buf, int *len, void __user *arg);
1937 int class_procfs_init(void);
1938 int class_procfs_clean(void);
1939
1940 #endif /* __LINUX_OBD_CLASS_H */