lustre/include/obd_class.h

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2014, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #ifndef __CLASS_OBD_H
  37 #define __CLASS_OBD_H
  38
  39
  40 #include <obd_support.h>
  41 #include <lustre_import.h>
  42 #include <lustre_net.h>
  43 #include <obd.h>
  44 #include <lustre_lib.h>
  45 #include <lustre/lustre_idl.h>
  46 #include <lprocfs_status.h>
  47
  48 #define OBD_STATFS_NODELAY      0x0001  /* requests should be send without delay
  49                                          * and resends for avoid deadlocks */
  50 #define OBD_STATFS_FROM_CACHE   0x0002  /* the statfs callback should not update
  51                                          * obd_osfs_age */
  52 #define OBD_STATFS_PTLRPCD      0x0004  /* requests will be sent via ptlrpcd
  53                                          * instead of a specific set. This
  54                                          * means that we cannot rely on the set
  55                                          * interpret routine to be called.
  56                                          * lov_statfs_fini() must thus be called
  57                                          * by the request interpret routine */
  58 #define OBD_STATFS_FOR_MDT0     0x0008  /* The statfs is only for retrieving
  59                                          * information from MDT0. */
  60
  61 /* OBD Device Declarations */
  62 extern struct obd_device *obd_devs[MAX_OBD_DEVICES];
  63 extern struct list_head obd_types;
  64 extern spinlock_t obd_types_lock;
  65 extern rwlock_t obd_dev_lock;
  66
  67 /* OBD Operations Declarations */
  68 extern struct obd_device *class_conn2obd(struct lustre_handle *);
  69 extern struct obd_device *class_exp2obd(struct obd_export *);
  70 extern int class_handle_ioctl(unsigned int cmd, unsigned long arg);
  71 extern int lustre_get_jobid(char *jobid);
  72
  73 struct lu_device_type;
  74
  75 /* genops.c */
  76 struct obd_export *class_conn2export(struct lustre_handle *);
  77 int class_register_type(struct obd_ops *, struct md_ops *, bool enable_proc,
  78                         struct lprocfs_vars *module_vars,
  79                         const char *nm, struct lu_device_type *ldt);
  80 int class_unregister_type(const char *nm);
  81
  82 struct obd_device *class_newdev(const char *type_name, const char *name);
  83 void class_release_dev(struct obd_device *obd);
  84
  85 int class_name2dev(const char *name);
  86 struct obd_device *class_name2obd(const char *name);
  87 int class_uuid2dev(struct obd_uuid *uuid);
  88 struct obd_device *class_uuid2obd(struct obd_uuid *uuid);
  89 void class_obd_list(void);
  90 struct obd_device * class_find_client_obd(struct obd_uuid *tgt_uuid,
  91                                           const char * typ_name,
  92                                           struct obd_uuid *grp_uuid);
  93 struct obd_device * class_devices_in_group(struct obd_uuid *grp_uuid,
  94                                            int *next);
  95 struct obd_device * class_num2obd(int num);
  96 int get_devices_count(void);
  97
  98 int class_notify_sptlrpc_conf(const char *fsname, int namelen);
  99
 100 char *obd_export_nid2str(struct obd_export *exp);
 101
 102 int obd_export_evict_by_nid(struct obd_device *obd, const char *nid);
 103 int obd_export_evict_by_uuid(struct obd_device *obd, const char *uuid);
 104 int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep);
 105
 106 int obd_zombie_impexp_init(void);
 107 void obd_zombie_impexp_stop(void);
 108 void obd_zombie_impexp_cull(void);
 109 void obd_zombie_barrier(void);
 110 void obd_exports_barrier(struct obd_device *obd);
 111 int kuc_len(int payload_len);
 112 struct kuc_hdr * kuc_ptr(void *p);
 113 int kuc_ispayload(void *p);
 114 void *kuc_alloc(int payload_len, int transport, int type);
 115 void kuc_free(void *p, int payload_len);
 116 int obd_get_request_slot(struct client_obd *cli);
 117 void obd_put_request_slot(struct client_obd *cli);
 118 __u32 obd_get_max_rpcs_in_flight(struct client_obd *cli);
 119 int obd_set_max_rpcs_in_flight(struct client_obd *cli, __u32 max);
 120
 121 struct llog_handle;
 122 struct llog_rec_hdr;
 123 typedef int (*llog_cb_t)(const struct lu_env *, struct llog_handle *,
 124                          struct llog_rec_hdr *, void *);
 125 /* obd_config.c */
 126 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
 127                                      const char *new_name);
 128 int class_process_config(struct lustre_cfg *lcfg);
 129 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 130                              struct lustre_cfg *lcfg, void *data);
 131 int class_attach(struct lustre_cfg *lcfg);
 132 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
 133 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg);
 134 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg);
 135 struct obd_device *class_incref(struct obd_device *obd,
 136                                 const char *scope, const void *source);
 137 void class_decref(struct obd_device *obd,
 138                   const char *scope, const void *source);
 139 void dump_exports(struct obd_device *obd, int locks);
 140 int class_config_llog_handler(const struct lu_env *env,
 141                               struct llog_handle *handle,
 142                               struct llog_rec_hdr *rec, void *data);
 143 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg);
 144 int class_add_uuid(const char *uuid, __u64 nid);
 145
 146 #define CFG_F_START     0x01   /* Set when we start updating from a log */
 147 #define CFG_F_MARKER    0x02   /* We are within a maker */
 148 #define CFG_F_SKIP      0x04   /* We should ignore this cfg command */
 149 #define CFG_F_COMPAT146 0x08   /* Allow old-style logs */
 150 #define CFG_F_EXCLUDE   0x10   /* OST exclusion list */
 151
 152 /* Passed as data param to class_config_parse_llog */
 153 struct config_llog_instance {
 154         char                    *cfg_obdname;
 155         void                    *cfg_instance;
 156         struct super_block      *cfg_sb;
 157         struct obd_uuid          cfg_uuid;
 158         llog_cb_t                cfg_callback;
 159         int                      cfg_last_idx; /* for partial llog processing */
 160         int                      cfg_flags;
 161         __u32                    cfg_lwp_idx;
 162 };
 163 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 164                             char *name, struct config_llog_instance *cfg);
 165 int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 166                            char *name, struct config_llog_instance *cfg);
 167
 168 enum {
 169         CONFIG_T_CONFIG  = 0,
 170         CONFIG_T_SPTLRPC = 1,
 171         CONFIG_T_RECOVER = 2,
 172         CONFIG_T_PARAMS  = 3,
 173         CONFIG_T_MAX     = 4
 174 };
 175
 176 #define PARAMS_FILENAME "params"
 177 #define LCTL_UPCALL     "lctl"
 178
 179 /* list of active configuration logs  */
 180 struct config_llog_data {
 181         struct ldlm_res_id          cld_resid;
 182         struct config_llog_instance cld_cfg;
 183         struct list_head            cld_list_chain;
 184         atomic_t                    cld_refcount;
 185         struct config_llog_data    *cld_sptlrpc;/* depended sptlrpc log */
 186         struct config_llog_data    *cld_params; /* common parameters log */
 187         struct config_llog_data    *cld_recover;/* imperative recover log */
 188         struct obd_export          *cld_mgcexp;
 189         struct mutex                cld_lock;
 190         int                         cld_type;
 191         unsigned int                cld_stopping:1, /* we were told to stop
 192                                                      * watching */
 193                                     cld_lostlock:1; /* lock not requeued */
 194         char                        cld_logname[0];
 195 };
 196
 197 struct lustre_profile {
 198         struct list_head         lp_list;
 199         char                    *lp_profile;
 200         char                    *lp_dt;
 201         char                    *lp_md;
 202 };
 203
 204 struct lustre_profile *class_get_profile(const char * prof);
 205 void class_del_profile(const char *prof);
 206 void class_del_profiles(void);
 207
 208 #if LUSTRE_TRACKS_LOCK_EXP_REFS
 209
 210 void __class_export_add_lock_ref(struct obd_export *, struct ldlm_lock *);
 211 void __class_export_del_lock_ref(struct obd_export *, struct ldlm_lock *);
 212 extern void (*class_export_dump_hook)(struct obd_export *);
 213
 214 #else
 215
 216 #define __class_export_add_lock_ref(exp, lock)             do {} while(0)
 217 #define __class_export_del_lock_ref(exp, lock)             do {} while(0)
 218
 219 #endif
 220
 221 #define class_export_rpc_inc(exp)                                       \
 222 ({                                                                      \
 223         atomic_inc(&(exp)->exp_rpc_count);                              \
 224         CDEBUG(D_INFO, "RPC GETting export %p : new rpc_count %d\n",    \
 225                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 226 })
 227
 228 #define class_export_rpc_dec(exp)                                       \
 229 ({                                                                      \
 230         LASSERT_ATOMIC_POS(&exp->exp_rpc_count);                        \
 231         atomic_dec(&(exp)->exp_rpc_count);                              \
 232         CDEBUG(D_INFO, "RPC PUTting export %p : new rpc_count %d\n",    \
 233                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 234 })
 235
 236 #define class_export_lock_get(exp, lock)                                \
 237 ({                                                                      \
 238         atomic_inc(&(exp)->exp_locks_count);                            \
 239         __class_export_add_lock_ref(exp, lock);                         \
 240         CDEBUG(D_INFO, "lock GETting export %p : new locks_count %d\n", \
 241                (exp), atomic_read(&(exp)->exp_locks_count));            \
 242         class_export_get(exp);                                          \
 243 })
 244
 245 #define class_export_lock_put(exp, lock)                                \
 246 ({                                                                      \
 247         LASSERT_ATOMIC_POS(&exp->exp_locks_count);                      \
 248         atomic_dec(&(exp)->exp_locks_count);                            \
 249         __class_export_del_lock_ref(exp, lock);                         \
 250         CDEBUG(D_INFO, "lock PUTting export %p : new locks_count %d\n", \
 251                (exp), atomic_read(&(exp)->exp_locks_count));            \
 252         class_export_put(exp);                                          \
 253 })
 254
 255 #define class_export_cb_get(exp)                                        \
 256 ({                                                                      \
 257         atomic_inc(&(exp)->exp_cb_count);                               \
 258         CDEBUG(D_INFO, "callback GETting export %p : new cb_count %d\n",\
 259                (exp), atomic_read(&(exp)->exp_cb_count));               \
 260         class_export_get(exp);                                          \
 261 })
 262
 263 #define class_export_cb_put(exp)                                        \
 264 ({                                                                      \
 265         LASSERT_ATOMIC_POS(&exp->exp_cb_count);                         \
 266         atomic_dec(&(exp)->exp_cb_count);                               \
 267         CDEBUG(D_INFO, "callback PUTting export %p : new cb_count %d\n",\
 268                (exp), atomic_read(&(exp)->exp_cb_count));               \
 269         class_export_put(exp);                                          \
 270 })
 271
 272 /* genops.c */
 273 struct obd_export *class_export_get(struct obd_export *exp);
 274 void class_export_put(struct obd_export *exp);
 275 struct obd_export *class_new_export(struct obd_device *obddev,
 276                                     struct obd_uuid *cluuid);
 277 void class_unlink_export(struct obd_export *exp);
 278
 279 struct obd_import *class_import_get(struct obd_import *);
 280 void class_import_put(struct obd_import *);
 281 struct obd_import *class_new_import(struct obd_device *obd);
 282 void class_destroy_import(struct obd_import *exp);
 283
 284 struct obd_type *class_search_type(const char *name);
 285 struct obd_type *class_get_type(const char *name);
 286 void class_put_type(struct obd_type *type);
 287 int class_connect(struct lustre_handle *conn, struct obd_device *obd,
 288                   struct obd_uuid *cluuid);
 289 int class_disconnect(struct obd_export *exp);
 290 void class_fail_export(struct obd_export *exp);
 291 int class_connected_export(struct obd_export *exp);
 292 void class_disconnect_exports(struct obd_device *obddev);
 293 int class_manual_cleanup(struct obd_device *obd);
 294 void class_disconnect_stale_exports(struct obd_device *,
 295                                     int (*test_export)(struct obd_export *));
 296 static inline enum obd_option exp_flags_from_obd(struct obd_device *obd)
 297 {
 298         return ((obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 299                 (obd->obd_force ? OBD_OPT_FORCE : 0) |
 300                 (obd->obd_abort_recovery ? OBD_OPT_ABORT_RECOV : 0) |
 301                 0);
 302 }
 303
 304 #ifdef HAVE_SERVER_SUPPORT
 305 static inline struct lu_target *class_exp2tgt(struct obd_export *exp)
 306 {
 307         LASSERT(exp->exp_obd);
 308         return exp->exp_obd->u.obt.obt_lut;
 309 }
 310
 311 static inline struct lr_server_data *class_server_data(struct obd_device *obd)
 312 {
 313         LASSERT(obd->u.obt.obt_lut);
 314         return &obd->u.obt.obt_lut->lut_lsd;
 315 }
 316 #endif
 317
 318 /* obdo.c */
 319 struct lu_attr;
 320 struct inode;
 321
 322 void obdo_from_la(struct obdo *dst, const struct lu_attr *la, u64 valid);
 323 void la_from_obdo(struct lu_attr *la, const struct obdo *dst, u64 valid);
 324
 325 void obdo_cpy_md(struct obdo *dst, const struct obdo *src, u64 valid);
 326 void obdo_to_ioobj(const struct obdo *oa, struct obd_ioobj *ioobj);
 327
 328 #define OBT(dev)        (dev)->obd_type
 329 #define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 330 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
 331 #define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
 332
 333 /* Ensure obd_setup: used for cleanup which must be called
 334    while obd is stopping */
 335 #define OBD_CHECK_DEV(obd)                                      \
 336 do {                                                            \
 337         if (!(obd)) {                                           \
 338                 CERROR("NULL device\n");                        \
 339                 RETURN(-ENODEV);                                \
 340         }                                                       \
 341 } while (0)
 342
 343 /* ensure obd_setup and !obd_stopping */
 344 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 345 do {                                                            \
 346         OBD_CHECK_DEV(obd);                                     \
 347         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 348                 CERROR("Device %d not setup\n",                 \
 349                        (obd)->obd_minor);                       \
 350                 RETURN(-ENODEV);                                \
 351         }                                                       \
 352 } while (0)
 353
 354
 355 #ifdef CONFIG_PROC_FS
 356 #define OBD_COUNTER_OFFSET(op)                                                 \
 357         ((offsetof(struct obd_ops, o_ ## op) -                                 \
 358           offsetof(struct obd_ops, o_iocontrol))                               \
 359          / sizeof(((struct obd_ops *)NULL)->o_iocontrol))
 360
 361 /* The '- 1' below is for o_owner. */
 362 #define NUM_OBD_STATS                                                          \
 363         (sizeof(struct obd_ops) /                                              \
 364          sizeof(((struct obd_ops *)NULL)->o_iocontrol) - 1)
 365
 366 #define OBD_COUNTER_INCREMENT(obd, op)                                         \
 367         lprocfs_counter_incr((obd)->obd_stats,                                 \
 368                              (obd)->obd_cntr_base + OBD_COUNTER_OFFSET(op))
 369
 370 #define EXP_COUNTER_INCREMENT(exp, op)                                         \
 371         do {                                                                   \
 372                 unsigned int _off;                                             \
 373                 _off = (exp)->exp_obd->obd_cntr_base + OBD_COUNTER_OFFSET(op); \
 374                 lprocfs_counter_incr((exp)->exp_obd->obd_stats, _off);         \
 375                 if ((exp)->exp_obd->obd_uses_nid_stats &&                      \
 376                     (exp)->exp_nid_stats != NULL)                              \
 377                         lprocfs_counter_incr((exp)->exp_nid_stats->nid_stats,  \
 378                                              _off);                            \
 379         } while (0)
 380
 381 #define _MD_COUNTER_OFFSET(m_op)                                               \
 382         ((offsetof(struct md_ops, m_op) -                                      \
 383           offsetof(struct md_ops, MD_STATS_FIRST_OP)) /                        \
 384          sizeof(((struct md_ops *)NULL)->MD_STATS_FIRST_OP))
 385
 386 #define MD_COUNTER_OFFSET(op) _MD_COUNTER_OFFSET(m_ ## op)
 387
 388 #define NUM_MD_STATS                                                           \
 389         (_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) -                                \
 390          _MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) + 1)
 391
 392 /* Note that we only increment md counters for ops whose offset is less
 393  * than NUM_MD_STATS. This is explained in a comment in the definition
 394  * of struct md_ops. */
 395 #define EXP_MD_COUNTER_INCREMENT(exp, op)                                      \
 396         do {                                                                   \
 397                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS)                      \
 398                         lprocfs_counter_incr((exp)->exp_obd->obd_md_stats,     \
 399                                         (exp)->exp_obd->obd_md_cntr_base +     \
 400                                         MD_COUNTER_OFFSET(op));                \
 401         } while (0)
 402
 403 #else
 404 #define OBD_COUNTER_OFFSET(op)
 405 #define OBD_COUNTER_INCREMENT(obd, op)
 406 #define EXP_COUNTER_INCREMENT(exp, op)
 407 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 408 #endif
 409
 410 static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
 411 {
 412         /* Always add in ldlm_stats */
 413         tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC
 414                                                   ,LPROCFS_STATS_FLAG_NOPERCPU);
 415         if (tmp->nid_ldlm_stats == NULL)
 416                 return -ENOMEM;
 417
 418         lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
 419
 420         return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
 421                                       tmp->nid_ldlm_stats);
 422 }
 423
 424 #define EXP_CHECK_MD_OP(exp, op)                                \
 425 do {                                                            \
 426         if ((exp) == NULL) {                                    \
 427                 CERROR("obd_" #op ": NULL export\n");           \
 428                 RETURN(-ENODEV);                                \
 429         }                                                       \
 430         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 431                 CERROR("obd_" #op ": cleaned up obd\n");        \
 432                 RETURN(-EOPNOTSUPP);                            \
 433         }                                                       \
 434         if (!OBT((exp)->exp_obd) || !MDP((exp)->exp_obd, op)) { \
 435                 CERROR("obd_" #op ": dev %s/%d no operation\n", \
 436                        (exp)->exp_obd->obd_name,                \
 437                        (exp)->exp_obd->obd_minor);              \
 438                 RETURN(-EOPNOTSUPP);                            \
 439         }                                                       \
 440 } while (0)
 441
 442
 443 #define OBD_CHECK_DT_OP(obd, op, err)                           \
 444 do {                                                            \
 445         if (!OBT(obd) || !OBP((obd), op)) {                     \
 446                 if (err)                                        \
 447                         CERROR("obd_" #op ": dev %d no operation\n",    \
 448                                obd->obd_minor);                 \
 449                 RETURN(err);                                    \
 450         }                                                       \
 451 } while (0)
 452
 453 #define EXP_CHECK_DT_OP(exp, op)                                \
 454 do {                                                            \
 455         if ((exp) == NULL) {                                    \
 456                 CERROR("obd_" #op ": NULL export\n");           \
 457                 RETURN(-ENODEV);                                \
 458         }                                                       \
 459         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 460                 CERROR("obd_" #op ": cleaned up obd\n");        \
 461                 RETURN(-EOPNOTSUPP);                            \
 462         }                                                       \
 463         if (!OBT((exp)->exp_obd) || !OBP((exp)->exp_obd, op)) { \
 464                 CERROR("obd_" #op ": dev %d no operation\n",    \
 465                        (exp)->exp_obd->obd_minor);              \
 466                 RETURN(-EOPNOTSUPP);                            \
 467         }                                                       \
 468 } while (0)
 469
 470 #define CTXT_CHECK_OP(ctxt, op, err)                                 \
 471 do {                                                                 \
 472         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {             \
 473                 if (err)                                             \
 474                         CERROR("lop_" #op ": dev %d no operation\n", \
 475                                ctxt->loc_obd->obd_minor);            \
 476                 RETURN(err);                                         \
 477         }                                                            \
 478 } while (0)
 479
 480 static inline int class_devno_max(void)
 481 {
 482         return MAX_OBD_DEVICES;
 483 }
 484
 485 static inline int obd_get_info(const struct lu_env *env,
 486                                struct obd_export *exp,
 487                                __u32 keylen, void *key,
 488                                __u32 *vallen, void *val,
 489                                struct lov_stripe_md *lsm)
 490 {
 491         int rc;
 492         ENTRY;
 493
 494         EXP_CHECK_DT_OP(exp, get_info);
 495         EXP_COUNTER_INCREMENT(exp, get_info);
 496
 497         rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val,
 498                                          lsm);
 499         RETURN(rc);
 500 }
 501
 502 static inline int obd_set_info_async(const struct lu_env *env,
 503                                      struct obd_export *exp,
 504                                      __u32 keylen, void *key,
 505                                      __u32 vallen, void *val,
 506                                      struct ptlrpc_request_set *set)
 507 {
 508         int rc;
 509         ENTRY;
 510
 511         EXP_CHECK_DT_OP(exp, set_info_async);
 512         EXP_COUNTER_INCREMENT(exp, set_info_async);
 513
 514         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 515                                                val, set);
 516         RETURN(rc);
 517 }
 518
 519 /*
 520  * obd-lu integration.
 521  *
 522  * Functionality is being moved into new lu_device-based layering, but some
 523  * pieces of configuration process are still based on obd devices.
 524  *
 525  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 526  * subsume ->o_setup() methods of obd devices they replace. The same for
 527  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 528  * result, obd_setup() and obd_process_config() branch and call one XOR
 529  * another.
 530  *
 531  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 532  * lu_device_type_operations::ldto_device_free() fully implement the
 533  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 534  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 535  */
 536
 537 #define DECLARE_LU_VARS(ldt, d)                 \
 538         struct lu_device_type *ldt;       \
 539         struct lu_device *d
 540
 541 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 542 {
 543         int rc;
 544         DECLARE_LU_VARS(ldt, d);
 545         ENTRY;
 546
 547         ldt = obd->obd_type->typ_lu;
 548         if (ldt != NULL) {
 549                 struct lu_context  session_ctx;
 550                 struct lu_env env;
 551                 lu_context_init(&session_ctx, LCT_SESSION | LCT_SERVER_SESSION);
 552                 session_ctx.lc_thread = NULL;
 553                 lu_context_enter(&session_ctx);
 554
 555                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 556                 if (rc == 0) {
 557                         env.le_ses = &session_ctx;
 558                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 559                         lu_env_fini(&env);
 560                         if (!IS_ERR(d)) {
 561                                 obd->obd_lu_dev = d;
 562                                 d->ld_obd = obd;
 563                                 rc = 0;
 564                         } else
 565                                 rc = PTR_ERR(d);
 566                 }
 567                 lu_context_exit(&session_ctx);
 568                 lu_context_fini(&session_ctx);
 569
 570         } else {
 571                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
 572                 OBD_COUNTER_INCREMENT(obd, setup);
 573                 rc = OBP(obd, setup)(obd, cfg);
 574         }
 575         RETURN(rc);
 576 }
 577
 578 static inline int obd_precleanup(struct obd_device *obd,
 579                                  enum obd_cleanup_stage cleanup_stage)
 580 {
 581         int rc;
 582         DECLARE_LU_VARS(ldt, d);
 583         ENTRY;
 584
 585         OBD_CHECK_DEV(obd);
 586         ldt = obd->obd_type->typ_lu;
 587         d = obd->obd_lu_dev;
 588         if (ldt != NULL && d != NULL) {
 589                 if (cleanup_stage == OBD_CLEANUP_EXPORTS) {
 590                         struct lu_env env;
 591
 592                         rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 593                         if (rc == 0) {
 594                                 ldt->ldt_ops->ldto_device_fini(&env, d);
 595                                 lu_env_fini(&env);
 596                         }
 597                 }
 598         }
 599         OBD_CHECK_DT_OP(obd, precleanup, 0);
 600         OBD_COUNTER_INCREMENT(obd, precleanup);
 601
 602         rc = OBP(obd, precleanup)(obd, cleanup_stage);
 603         RETURN(rc);
 604 }
 605
 606 static inline int obd_cleanup(struct obd_device *obd)
 607 {
 608         int rc;
 609         DECLARE_LU_VARS(ldt, d);
 610         ENTRY;
 611
 612         OBD_CHECK_DEV(obd);
 613
 614         ldt = obd->obd_type->typ_lu;
 615         d = obd->obd_lu_dev;
 616         if (ldt != NULL && d != NULL) {
 617                 struct lu_env env;
 618
 619                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 620                 if (rc == 0) {
 621                         ldt->ldt_ops->ldto_device_free(&env, d);
 622                         lu_env_fini(&env);
 623                         obd->obd_lu_dev = NULL;
 624                 }
 625         }
 626         OBD_CHECK_DT_OP(obd, cleanup, 0);
 627         OBD_COUNTER_INCREMENT(obd, cleanup);
 628
 629         rc = OBP(obd, cleanup)(obd);
 630         RETURN(rc);
 631 }
 632
 633 static inline void obd_cleanup_client_import(struct obd_device *obd)
 634 {
 635         ENTRY;
 636
 637         /* If we set up but never connected, the
 638            client import will not have been cleaned. */
 639         down_write(&obd->u.cli.cl_sem);
 640         if (obd->u.cli.cl_import) {
 641                 struct obd_import *imp;
 642                 imp = obd->u.cli.cl_import;
 643                 CDEBUG(D_CONFIG, "%s: client import never connected\n",
 644                        obd->obd_name);
 645                 ptlrpc_invalidate_import(imp);
 646                 if (imp->imp_rq_pool) {
 647                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
 648                         imp->imp_rq_pool = NULL;
 649                 }
 650                 client_destroy_import(imp);
 651                 obd->u.cli.cl_import = NULL;
 652         }
 653         up_write(&obd->u.cli.cl_sem);
 654
 655         EXIT;
 656 }
 657
 658 static inline int
 659 obd_process_config(struct obd_device *obd, int datalen, void *data)
 660 {
 661         int rc;
 662         DECLARE_LU_VARS(ldt, d);
 663         ENTRY;
 664
 665         OBD_CHECK_DEV(obd);
 666
 667         obd->obd_process_conf = 1;
 668         ldt = obd->obd_type->typ_lu;
 669         d = obd->obd_lu_dev;
 670         if (ldt != NULL && d != NULL) {
 671                 struct lu_env env;
 672
 673                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 674                 if (rc == 0) {
 675                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 676                         lu_env_fini(&env);
 677                 }
 678         } else {
 679                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
 680                 rc = OBP(obd, process_config)(obd, datalen, data);
 681         }
 682         OBD_COUNTER_INCREMENT(obd, process_config);
 683         obd->obd_process_conf = 0;
 684
 685         RETURN(rc);
 686 }
 687
 688 /* Pack an in-memory MD struct for storage on disk.
 689  * Returns +ve size of packed MD (0 for free), or -ve error.
 690  *
 691  * If @disk_tgt == NULL, MD size is returned (max size if @mem_src == NULL).
 692  * If @*disk_tgt != NULL and @mem_src == NULL, @*disk_tgt will be freed.
 693  * If @*disk_tgt == NULL, it will be allocated
 694  */
 695 static inline int obd_packmd(struct obd_export *exp,
 696                              struct lov_mds_md **disk_tgt,
 697                              struct lov_stripe_md *mem_src)
 698 {
 699         int rc;
 700         ENTRY;
 701
 702         EXP_CHECK_DT_OP(exp, packmd);
 703         EXP_COUNTER_INCREMENT(exp, packmd);
 704
 705         rc = OBP(exp->exp_obd, packmd)(exp, disk_tgt, mem_src);
 706         RETURN(rc);
 707 }
 708
 709 static inline int obd_size_diskmd(struct obd_export *exp,
 710                                   struct lov_stripe_md *mem_src)
 711 {
 712         return obd_packmd(exp, NULL, mem_src);
 713 }
 714
 715 static inline int obd_free_diskmd(struct obd_export *exp,
 716                                   struct lov_mds_md **disk_tgt)
 717 {
 718         LASSERT(disk_tgt);
 719         LASSERT(*disk_tgt);
 720         /*
 721          * LU-2590, for caller's convenience, *disk_tgt could be host
 722          * endianness, it needs swab to LE if necessary, while just
 723          * lov_mds_md header needs it for figuring out how much memory
 724          * needs to be freed.
 725          */
 726         if ((cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) &&
 727             (((*disk_tgt)->lmm_magic == LOV_MAGIC_V1) ||
 728              ((*disk_tgt)->lmm_magic == LOV_MAGIC_V3)))
 729                 lustre_swab_lov_mds_md(*disk_tgt);
 730         return obd_packmd(exp, disk_tgt, NULL);
 731 }
 732
 733 /* Unpack an MD struct from disk to in-memory format.
 734  * Returns +ve size of unpacked MD (0 for free), or -ve error.
 735  *
 736  * If @mem_tgt == NULL, MD size is returned (max size if @disk_src == NULL).
 737  * If @*mem_tgt != NULL and @disk_src == NULL, @*mem_tgt will be freed.
 738  * If @*mem_tgt == NULL, it will be allocated
 739  */
 740 static inline int obd_unpackmd(struct obd_export *exp,
 741                                struct lov_stripe_md **mem_tgt,
 742                                struct lov_mds_md *disk_src,
 743                                int disk_len)
 744 {
 745         int rc;
 746         ENTRY;
 747
 748         EXP_CHECK_DT_OP(exp, unpackmd);
 749         EXP_COUNTER_INCREMENT(exp, unpackmd);
 750
 751         rc = OBP(exp->exp_obd, unpackmd)(exp, mem_tgt, disk_src, disk_len);
 752         RETURN(rc);
 753 }
 754
 755 static inline int obd_free_memmd(struct obd_export *exp,
 756                                  struct lov_stripe_md **mem_tgt)
 757 {
 758         int rc;
 759
 760         LASSERT(mem_tgt);
 761         LASSERT(*mem_tgt);
 762         rc = obd_unpackmd(exp, mem_tgt, NULL, 0);
 763         *mem_tgt = NULL;
 764         return rc;
 765 }
 766
 767 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 768                              struct obdo *obdo, struct obd_trans_info *oti)
 769 {
 770         int rc;
 771         ENTRY;
 772
 773         EXP_CHECK_DT_OP(exp, create);
 774         EXP_COUNTER_INCREMENT(exp, create);
 775
 776         rc = OBP(exp->exp_obd, create)(env, exp, obdo, oti);
 777         RETURN(rc);
 778 }
 779
 780 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 781                               struct obdo *obdo, struct obd_trans_info *oti)
 782 {
 783         int rc;
 784         ENTRY;
 785
 786         EXP_CHECK_DT_OP(exp, destroy);
 787         EXP_COUNTER_INCREMENT(exp, destroy);
 788
 789         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo, oti);
 790         RETURN(rc);
 791 }
 792
 793 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 794                               struct obd_info *oinfo)
 795 {
 796         int rc;
 797         ENTRY;
 798
 799         EXP_CHECK_DT_OP(exp, getattr);
 800         EXP_COUNTER_INCREMENT(exp, getattr);
 801
 802         rc = OBP(exp->exp_obd, getattr)(env, exp, oinfo);
 803         RETURN(rc);
 804 }
 805
 806 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 807                               struct obd_info *oinfo,
 808                               struct obd_trans_info *oti)
 809 {
 810         int rc;
 811         ENTRY;
 812
 813         EXP_CHECK_DT_OP(exp, setattr);
 814         EXP_COUNTER_INCREMENT(exp, setattr);
 815
 816         rc = OBP(exp->exp_obd, setattr)(env, exp, oinfo, oti);
 817         RETURN(rc);
 818 }
 819
 820 /* This performs all the requests set init/wait/destroy actions. */
 821 static inline int obd_setattr_rqset(struct obd_export *exp,
 822                                     struct obd_info *oinfo,
 823                                     struct obd_trans_info *oti)
 824 {
 825         struct ptlrpc_request_set *set = NULL;
 826         int rc;
 827         ENTRY;
 828
 829         EXP_CHECK_DT_OP(exp, setattr_async);
 830         EXP_COUNTER_INCREMENT(exp, setattr_async);
 831
 832         set =  ptlrpc_prep_set();
 833         if (set == NULL)
 834                 RETURN(-ENOMEM);
 835
 836         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 837         if (rc == 0)
 838                 rc = ptlrpc_set_wait(set);
 839         ptlrpc_set_destroy(set);
 840         RETURN(rc);
 841 }
 842
 843 /* This adds all the requests into @set if @set != NULL, otherwise
 844    all requests are sent asynchronously without waiting for response. */
 845 static inline int obd_setattr_async(struct obd_export *exp,
 846                                     struct obd_info *oinfo,
 847                                     struct obd_trans_info *oti,
 848                                     struct ptlrpc_request_set *set)
 849 {
 850         int rc;
 851         ENTRY;
 852
 853         EXP_CHECK_DT_OP(exp, setattr_async);
 854         EXP_COUNTER_INCREMENT(exp, setattr_async);
 855
 856         rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
 857         RETURN(rc);
 858 }
 859
 860 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 861                                int priority)
 862 {
 863         struct obd_device *obd = imp->imp_obd;
 864         int rc;
 865         ENTRY;
 866
 867         OBD_CHECK_DEV_ACTIVE(obd);
 868         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 869         OBD_COUNTER_INCREMENT(obd, add_conn);
 870
 871         rc = OBP(obd, add_conn)(imp, uuid, priority);
 872         RETURN(rc);
 873 }
 874
 875 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 876 {
 877         struct obd_device *obd = imp->imp_obd;
 878         int rc;
 879         ENTRY;
 880
 881         OBD_CHECK_DEV_ACTIVE(obd);
 882         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 883         OBD_COUNTER_INCREMENT(obd, del_conn);
 884
 885         rc = OBP(obd, del_conn)(imp, uuid);
 886         RETURN(rc);
 887 }
 888
 889 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 890 {
 891         struct obd_uuid *uuid;
 892         ENTRY;
 893
 894         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 895         EXP_COUNTER_INCREMENT(exp, get_uuid);
 896
 897         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 898         RETURN(uuid);
 899 }
 900
 901 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 902  * @param exp New export handle
 903  * @param d Connect data, supported flags are set, flags also understood
 904  *    by obd are returned.
 905  */
 906 static inline int obd_connect(const struct lu_env *env,
 907                               struct obd_export **exp,struct obd_device *obd,
 908                               struct obd_uuid *cluuid,
 909                               struct obd_connect_data *data,
 910                               void *localdata)
 911 {
 912         int rc;
 913         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 914                                                    * check */
 915         ENTRY;
 916
 917         OBD_CHECK_DEV_ACTIVE(obd);
 918         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
 919         OBD_COUNTER_INCREMENT(obd, connect);
 920
 921         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 922         /* check that only subset is granted */
 923         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
 924                                     data->ocd_connect_flags));
 925         RETURN(rc);
 926 }
 927
 928 static inline int obd_reconnect(const struct lu_env *env,
 929                                 struct obd_export *exp,
 930                                 struct obd_device *obd,
 931                                 struct obd_uuid *cluuid,
 932                                 struct obd_connect_data *d,
 933                                 void *localdata)
 934 {
 935         int rc;
 936         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
 937                                                    * check */
 938
 939         ENTRY;
 940
 941         OBD_CHECK_DEV_ACTIVE(obd);
 942         OBD_CHECK_DT_OP(obd, reconnect, 0);
 943         OBD_COUNTER_INCREMENT(obd, reconnect);
 944
 945         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 946         /* check that only subset is granted */
 947         LASSERT(ergo(d != NULL,
 948                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 949         RETURN(rc);
 950 }
 951
 952 static inline int obd_disconnect(struct obd_export *exp)
 953 {
 954         int rc;
 955         ENTRY;
 956
 957         EXP_CHECK_DT_OP(exp, disconnect);
 958         EXP_COUNTER_INCREMENT(exp, disconnect);
 959
 960         rc = OBP(exp->exp_obd, disconnect)(exp);
 961         RETURN(rc);
 962 }
 963
 964 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
 965                                enum lu_cli_type type)
 966 {
 967         int rc;
 968         ENTRY;
 969
 970         OBD_CHECK_DT_OP(obd, fid_init, 0);
 971         OBD_COUNTER_INCREMENT(obd, fid_init);
 972
 973         rc = OBP(obd, fid_init)(obd, exp, type);
 974         RETURN(rc);
 975 }
 976
 977 static inline int obd_fid_fini(struct obd_device *obd)
 978 {
 979         int rc;
 980         ENTRY;
 981
 982         OBD_CHECK_DT_OP(obd, fid_fini, 0);
 983         OBD_COUNTER_INCREMENT(obd, fid_fini);
 984
 985         rc = OBP(obd, fid_fini)(obd);
 986         RETURN(rc);
 987 }
 988
 989 static inline int obd_fid_alloc(const struct lu_env *env,
 990                                 struct obd_export *exp,
 991                                 struct lu_fid *fid,
 992                                 struct md_op_data *op_data)
 993 {
 994         int rc;
 995         ENTRY;
 996
 997         EXP_CHECK_DT_OP(exp, fid_alloc);
 998         EXP_COUNTER_INCREMENT(exp, fid_alloc);
 999
1000         rc = OBP(exp->exp_obd, fid_alloc)(env, exp, fid, op_data);
1001         RETURN(rc);
1002 }
1003
1004 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
1005 {
1006         int rc;
1007         ENTRY;
1008
1009         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
1010         EXP_COUNTER_INCREMENT(exp, ping);
1011
1012         rc = OBP(exp->exp_obd, ping)(env, exp);
1013         RETURN(rc);
1014 }
1015
1016 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
1017 {
1018         int rc;
1019         ENTRY;
1020
1021         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
1022         OBD_COUNTER_INCREMENT(obd, pool_new);
1023
1024         rc = OBP(obd, pool_new)(obd, poolname);
1025         RETURN(rc);
1026 }
1027
1028 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
1029 {
1030         int rc;
1031         ENTRY;
1032
1033         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
1034         OBD_COUNTER_INCREMENT(obd, pool_del);
1035
1036         rc = OBP(obd, pool_del)(obd, poolname);
1037         RETURN(rc);
1038 }
1039
1040 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
1041 {
1042         int rc;
1043         ENTRY;
1044
1045         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
1046         OBD_COUNTER_INCREMENT(obd, pool_add);
1047
1048         rc = OBP(obd, pool_add)(obd, poolname, ostname);
1049         RETURN(rc);
1050 }
1051
1052 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
1053 {
1054         int rc;
1055         ENTRY;
1056
1057         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
1058         OBD_COUNTER_INCREMENT(obd, pool_rem);
1059
1060         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
1061         RETURN(rc);
1062 }
1063
1064 static inline void obd_getref(struct obd_device *obd)
1065 {
1066         ENTRY;
1067         if (OBT(obd) && OBP(obd, getref)) {
1068                 OBD_COUNTER_INCREMENT(obd, getref);
1069                 OBP(obd, getref)(obd);
1070         }
1071         EXIT;
1072 }
1073
1074 static inline void obd_putref(struct obd_device *obd)
1075 {
1076         ENTRY;
1077         if (OBT(obd) && OBP(obd, putref)) {
1078                 OBD_COUNTER_INCREMENT(obd, putref);
1079                 OBP(obd, putref)(obd);
1080         }
1081         EXIT;
1082 }
1083
1084 static inline int obd_init_export(struct obd_export *exp)
1085 {
1086         int rc = 0;
1087
1088         ENTRY;
1089         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1090             OBP((exp)->exp_obd, init_export))
1091                 rc = OBP(exp->exp_obd, init_export)(exp);
1092         RETURN(rc);
1093 }
1094
1095 static inline int obd_destroy_export(struct obd_export *exp)
1096 {
1097         ENTRY;
1098         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
1099             OBP((exp)->exp_obd, destroy_export))
1100                 OBP(exp->exp_obd, destroy_export)(exp);
1101         RETURN(0);
1102 }
1103
1104 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1105  * If the cache is older than @max_age we will get a new value from the
1106  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1107 static inline int obd_statfs_async(struct obd_export *exp,
1108                                    struct obd_info *oinfo,
1109                                    __u64 max_age,
1110                                    struct ptlrpc_request_set *rqset)
1111 {
1112         int rc = 0;
1113         struct obd_device *obd;
1114         ENTRY;
1115
1116         if (exp == NULL || exp->exp_obd == NULL)
1117                 RETURN(-EINVAL);
1118
1119         obd = exp->exp_obd;
1120         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1121         OBD_COUNTER_INCREMENT(obd, statfs);
1122
1123         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
1124                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1125         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1126                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1127         } else {
1128                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
1129                        " objects "LPU64"/"LPU64"\n",
1130                        obd->obd_name, &obd->obd_osfs,
1131                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1132                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1133                 spin_lock(&obd->obd_osfs_lock);
1134                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1135                 spin_unlock(&obd->obd_osfs_lock);
1136                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1137                 if (oinfo->oi_cb_up)
1138                         oinfo->oi_cb_up(oinfo, 0);
1139         }
1140         RETURN(rc);
1141 }
1142
1143 static inline int obd_statfs_rqset(struct obd_export *exp,
1144                                    struct obd_statfs *osfs, __u64 max_age,
1145                                    __u32 flags)
1146 {
1147         struct ptlrpc_request_set *set = NULL;
1148         struct obd_info oinfo = { { { 0 } } };
1149         int rc = 0;
1150         ENTRY;
1151
1152         set =  ptlrpc_prep_set();
1153         if (set == NULL)
1154                 RETURN(-ENOMEM);
1155
1156         oinfo.oi_osfs = osfs;
1157         oinfo.oi_flags = flags;
1158         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1159         if (rc == 0)
1160                 rc = ptlrpc_set_wait(set);
1161         ptlrpc_set_destroy(set);
1162         RETURN(rc);
1163 }
1164
1165 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1166  * If the cache is older than @max_age we will get a new value from the
1167  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1168 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1169                              struct obd_statfs *osfs, __u64 max_age,
1170                              __u32 flags)
1171 {
1172         int rc = 0;
1173         struct obd_device *obd = exp->exp_obd;
1174         ENTRY;
1175
1176         if (obd == NULL)
1177                 RETURN(-EINVAL);
1178
1179         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1180         OBD_COUNTER_INCREMENT(obd, statfs);
1181
1182         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
1183                obd->obd_osfs_age, max_age);
1184         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1185                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1186                 if (rc == 0) {
1187                         spin_lock(&obd->obd_osfs_lock);
1188                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1189                         obd->obd_osfs_age = cfs_time_current_64();
1190                         spin_unlock(&obd->obd_osfs_lock);
1191                 }
1192         } else {
1193                 CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
1194                        " objects "LPU64"/"LPU64"\n",
1195                        obd->obd_name, &obd->obd_osfs,
1196                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1197                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1198                 spin_lock(&obd->obd_osfs_lock);
1199                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1200                 spin_unlock(&obd->obd_osfs_lock);
1201         }
1202         RETURN(rc);
1203 }
1204
1205 static inline int obd_preprw(const struct lu_env *env, int cmd,
1206                              struct obd_export *exp, struct obdo *oa,
1207                              int objcount, struct obd_ioobj *obj,
1208                              struct niobuf_remote *remote, int *pages,
1209                              struct niobuf_local *local,
1210                              struct obd_trans_info *oti,
1211                              struct lustre_capa *capa)
1212 {
1213         int rc;
1214         ENTRY;
1215
1216         EXP_CHECK_DT_OP(exp, preprw);
1217         EXP_COUNTER_INCREMENT(exp, preprw);
1218
1219         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1220                                        pages, local, oti, capa);
1221         RETURN(rc);
1222 }
1223
1224 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1225                                struct obd_export *exp, struct obdo *oa,
1226                                int objcount, struct obd_ioobj *obj,
1227                                struct niobuf_remote *rnb, int pages,
1228                                struct niobuf_local *local,
1229                                struct obd_trans_info *oti, int rc)
1230 {
1231         ENTRY;
1232
1233         EXP_CHECK_DT_OP(exp, commitrw);
1234         EXP_COUNTER_INCREMENT(exp, commitrw);
1235
1236         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1237                                          rnb, pages, local, oti, rc);
1238         RETURN(rc);
1239 }
1240
1241 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1242                                 int len, void *karg, void __user *uarg)
1243 {
1244         int rc;
1245         ENTRY;
1246
1247         EXP_CHECK_DT_OP(exp, iocontrol);
1248         EXP_COUNTER_INCREMENT(exp, iocontrol);
1249
1250         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1251         RETURN(rc);
1252 }
1253
1254 static inline void obd_import_event(struct obd_device *obd,
1255                                     struct obd_import *imp,
1256                                     enum obd_import_event event)
1257 {
1258         ENTRY;
1259         if (!obd) {
1260                 CERROR("NULL device\n");
1261                 EXIT;
1262                 return;
1263         }
1264         if (obd->obd_set_up && OBP(obd, import_event)) {
1265                 OBD_COUNTER_INCREMENT(obd, import_event);
1266                 OBP(obd, import_event)(obd, imp, event);
1267         }
1268         EXIT;
1269 }
1270
1271 static inline int obd_notify(struct obd_device *obd,
1272                              struct obd_device *watched,
1273                              enum obd_notify_event ev,
1274                              void *data)
1275 {
1276         int rc;
1277         ENTRY;
1278         OBD_CHECK_DEV(obd);
1279
1280         if (!obd->obd_set_up) {
1281                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1282                 RETURN(-EINVAL);
1283         }
1284
1285         if (!OBP(obd, notify)) {
1286                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1287                 RETURN(-ENOSYS);
1288         }
1289
1290         OBD_COUNTER_INCREMENT(obd, notify);
1291         rc = OBP(obd, notify)(obd, watched, ev, data);
1292         RETURN(rc);
1293 }
1294
1295 static inline int obd_notify_observer(struct obd_device *observer,
1296                                       struct obd_device *observed,
1297                                       enum obd_notify_event ev,
1298                                       void *data)
1299 {
1300         int rc1;
1301         int rc2;
1302
1303         struct obd_notify_upcall *onu;
1304
1305         if (observer->obd_observer)
1306                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1307         else
1308                 rc1 = 0;
1309         /*
1310          * Also, call non-obd listener, if any
1311          */
1312         onu = &observer->obd_upcall;
1313         if (onu->onu_upcall != NULL)
1314                 rc2 = onu->onu_upcall(observer, observed, ev,
1315                                       onu->onu_owner, NULL);
1316         else
1317                 rc2 = 0;
1318
1319         return rc1 ? rc1 : rc2;
1320 }
1321
1322 static inline int obd_quotacheck(struct obd_export *exp,
1323                                  struct obd_quotactl *oqctl)
1324 {
1325         int rc;
1326         ENTRY;
1327
1328         EXP_CHECK_DT_OP(exp, quotacheck);
1329         EXP_COUNTER_INCREMENT(exp, quotacheck);
1330
1331         rc = OBP(exp->exp_obd, quotacheck)(exp->exp_obd, exp, oqctl);
1332         RETURN(rc);
1333 }
1334
1335 static inline int obd_quotactl(struct obd_export *exp,
1336                                struct obd_quotactl *oqctl)
1337 {
1338         int rc;
1339         ENTRY;
1340
1341         EXP_CHECK_DT_OP(exp, quotactl);
1342         EXP_COUNTER_INCREMENT(exp, quotactl);
1343
1344         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1345         RETURN(rc);
1346 }
1347
1348 static inline int obd_health_check(const struct lu_env *env,
1349                                    struct obd_device *obd)
1350 {
1351         /* returns: 0 on healthy
1352          *         >0 on unhealthy + reason code/flag
1353          *            however the only suppored reason == 1 right now
1354          *            We'll need to define some better reasons
1355          *            or flags in the future.
1356          *         <0 on error
1357          */
1358         int rc;
1359         ENTRY;
1360
1361         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1362         if (obd == NULL || !OBT(obd)) {
1363                 CERROR("cleaned up obd\n");
1364                 RETURN(-EOPNOTSUPP);
1365         }
1366         if (!obd->obd_set_up || obd->obd_stopping)
1367                 RETURN(0);
1368         if (!OBP(obd, health_check))
1369                 RETURN(0);
1370
1371         rc = OBP(obd, health_check)(env, obd);
1372         RETURN(rc);
1373 }
1374
1375 static inline int obd_register_observer(struct obd_device *obd,
1376                                         struct obd_device *observer)
1377 {
1378         ENTRY;
1379         OBD_CHECK_DEV(obd);
1380         down_write(&obd->obd_observer_link_sem);
1381         if (obd->obd_observer && observer) {
1382                 up_write(&obd->obd_observer_link_sem);
1383                 RETURN(-EALREADY);
1384         }
1385         obd->obd_observer = observer;
1386         up_write(&obd->obd_observer_link_sem);
1387         RETURN(0);
1388 }
1389
1390 /* metadata helpers */
1391 static inline int md_getstatus(struct obd_export *exp,
1392                                struct lu_fid *fid, struct obd_capa **pc)
1393 {
1394         int rc;
1395         ENTRY;
1396
1397         EXP_CHECK_MD_OP(exp, getstatus);
1398         EXP_MD_COUNTER_INCREMENT(exp, getstatus);
1399         rc = MDP(exp->exp_obd, getstatus)(exp, fid, pc);
1400         RETURN(rc);
1401 }
1402
1403 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1404                              struct ptlrpc_request **request)
1405 {
1406         int rc;
1407         ENTRY;
1408         EXP_CHECK_MD_OP(exp, getattr);
1409         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1410         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1411         RETURN(rc);
1412 }
1413
1414 static inline int md_null_inode(struct obd_export *exp,
1415                                    const struct lu_fid *fid)
1416 {
1417         int rc;
1418         ENTRY;
1419         EXP_CHECK_MD_OP(exp, null_inode);
1420         EXP_MD_COUNTER_INCREMENT(exp, null_inode);
1421         rc = MDP(exp->exp_obd, null_inode)(exp, fid);
1422         RETURN(rc);
1423 }
1424
1425 static inline int md_find_cbdata(struct obd_export *exp,
1426                                  const struct lu_fid *fid,
1427                                  ldlm_iterator_t it, void *data)
1428 {
1429         int rc;
1430         ENTRY;
1431         EXP_CHECK_MD_OP(exp, find_cbdata);
1432         EXP_MD_COUNTER_INCREMENT(exp, find_cbdata);
1433         rc = MDP(exp->exp_obd, find_cbdata)(exp, fid, it, data);
1434         RETURN(rc);
1435 }
1436
1437 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1438                            struct md_open_data *mod,
1439                            struct ptlrpc_request **request)
1440 {
1441         int rc;
1442         ENTRY;
1443         EXP_CHECK_MD_OP(exp, close);
1444         EXP_MD_COUNTER_INCREMENT(exp, close);
1445         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1446         RETURN(rc);
1447 }
1448
1449 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1450                             const void *data, size_t datalen, umode_t mode,
1451                             uid_t uid, gid_t gid, cfs_cap_t cap_effective,
1452                             __u64 rdev, struct ptlrpc_request **request)
1453 {
1454         int rc;
1455         ENTRY;
1456         EXP_CHECK_MD_OP(exp, create);
1457         EXP_MD_COUNTER_INCREMENT(exp, create);
1458         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1459                                        uid, gid, cap_effective, rdev, request);
1460         RETURN(rc);
1461 }
1462
1463 static inline int md_enqueue(struct obd_export *exp,
1464                              struct ldlm_enqueue_info *einfo,
1465                              const union ldlm_policy_data *policy,
1466                              struct lookup_intent *it,
1467                              struct md_op_data *op_data,
1468                              struct lustre_handle *lockh,
1469                              __u64 extra_lock_flags)
1470 {
1471         int rc;
1472         ENTRY;
1473         EXP_CHECK_MD_OP(exp, enqueue);
1474         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1475         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, policy, it, op_data, lockh,
1476                                         extra_lock_flags);
1477         RETURN(rc);
1478 }
1479
1480 static inline int md_getattr_name(struct obd_export *exp,
1481                                   struct md_op_data *op_data,
1482                                   struct ptlrpc_request **request)
1483 {
1484         int rc;
1485         ENTRY;
1486         EXP_CHECK_MD_OP(exp, getattr_name);
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         EXP_CHECK_MD_OP(exp, intent_lock);
1502         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1503         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, it, reqp, cb_blocking,
1504                                             extra_lock_flags);
1505         RETURN(rc);
1506 }
1507
1508 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1509                           struct ptlrpc_request **request)
1510 {
1511         int rc;
1512         ENTRY;
1513         EXP_CHECK_MD_OP(exp, link);
1514         EXP_MD_COUNTER_INCREMENT(exp, link);
1515         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1516         RETURN(rc);
1517 }
1518
1519 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1520                             const char *old, size_t oldlen, const char *new,
1521                             size_t newlen, struct ptlrpc_request **request)
1522 {
1523         int rc;
1524         ENTRY;
1525         EXP_CHECK_MD_OP(exp, rename);
1526         EXP_MD_COUNTER_INCREMENT(exp, rename);
1527         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1528                                        newlen, request);
1529         RETURN(rc);
1530 }
1531
1532 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
1533                              void *ea, size_t ealen,
1534                              struct ptlrpc_request **request)
1535 {
1536         int rc;
1537         ENTRY;
1538         EXP_CHECK_MD_OP(exp, setattr);
1539         EXP_MD_COUNTER_INCREMENT(exp, setattr);
1540         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen, request);
1541         RETURN(rc);
1542 }
1543
1544 static inline int md_fsync(struct obd_export *exp, const struct lu_fid *fid,
1545                            struct obd_capa *oc, struct ptlrpc_request **request)
1546 {
1547         int rc;
1548         ENTRY;
1549         EXP_CHECK_MD_OP(exp, fsync);
1550         EXP_MD_COUNTER_INCREMENT(exp, fsync);
1551         rc = MDP(exp->exp_obd, fsync)(exp, fid, oc, request);
1552         RETURN(rc);
1553 }
1554
1555 static inline int md_read_page(struct obd_export *exp,
1556                                struct md_op_data *op_data,
1557                                struct md_callback *cb_op,
1558                                __u64  hash_offset,
1559                                struct page **ppage)
1560 {
1561         int rc;
1562         ENTRY;
1563         EXP_CHECK_MD_OP(exp, read_page);
1564         EXP_MD_COUNTER_INCREMENT(exp, read_page);
1565         rc = MDP(exp->exp_obd, read_page)(exp, op_data, cb_op, hash_offset,
1566                                           ppage);
1567         RETURN(rc);
1568 }
1569
1570 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
1571                             struct ptlrpc_request **request)
1572 {
1573         int rc;
1574         ENTRY;
1575         EXP_CHECK_MD_OP(exp, unlink);
1576         EXP_MD_COUNTER_INCREMENT(exp, unlink);
1577         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
1578         RETURN(rc);
1579 }
1580
1581 static inline int md_get_lustre_md(struct obd_export *exp,
1582                                    struct ptlrpc_request *req,
1583                                    struct obd_export *dt_exp,
1584                                    struct obd_export *md_exp,
1585                                    struct lustre_md *md)
1586 {
1587         ENTRY;
1588         EXP_CHECK_MD_OP(exp, get_lustre_md);
1589         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
1590         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
1591 }
1592
1593 static inline int md_free_lustre_md(struct obd_export *exp,
1594                                     struct lustre_md *md)
1595 {
1596         ENTRY;
1597         EXP_CHECK_MD_OP(exp, free_lustre_md);
1598         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
1599         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
1600 }
1601
1602 static inline int md_merge_attr(struct obd_export *exp,
1603                                 const struct lmv_stripe_md *lsm,
1604                                 struct cl_attr *attr,
1605                                 ldlm_blocking_callback cb)
1606 {
1607         ENTRY;
1608         EXP_CHECK_MD_OP(exp, merge_attr);
1609         EXP_MD_COUNTER_INCREMENT(exp, merge_attr);
1610         RETURN(MDP(exp->exp_obd, merge_attr)(exp, lsm, attr, cb));
1611 }
1612
1613 static inline int md_setxattr(struct obd_export *exp,
1614                               const struct lu_fid *fid, struct obd_capa *oc,
1615                               u64 valid, const char *name,
1616                               const char *input, int input_size,
1617                               int output_size, int flags, __u32 suppgid,
1618                               struct ptlrpc_request **request)
1619 {
1620         ENTRY;
1621         EXP_CHECK_MD_OP(exp, setxattr);
1622         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
1623         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, oc, valid, name, input,
1624                                            input_size, output_size, flags,
1625                                            suppgid, request));
1626 }
1627
1628 static inline int md_getxattr(struct obd_export *exp,
1629                               const struct lu_fid *fid, struct obd_capa *oc,
1630                               u64 valid, const char *name,
1631                               const char *input, int input_size,
1632                               int output_size, int flags,
1633                               struct ptlrpc_request **request)
1634 {
1635         ENTRY;
1636         EXP_CHECK_MD_OP(exp, getxattr);
1637         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
1638         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, oc, valid, name, input,
1639                                            input_size, output_size, flags,
1640                                            request));
1641 }
1642
1643 static inline int md_set_open_replay_data(struct obd_export *exp,
1644                                           struct obd_client_handle *och,
1645                                           struct lookup_intent *it)
1646 {
1647         ENTRY;
1648         EXP_CHECK_MD_OP(exp, set_open_replay_data);
1649         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
1650         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, it));
1651 }
1652
1653 static inline int md_clear_open_replay_data(struct obd_export *exp,
1654                                             struct obd_client_handle *och)
1655 {
1656         ENTRY;
1657         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
1658         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
1659         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
1660 }
1661
1662 static inline int md_set_lock_data(struct obd_export *exp,
1663                                    __u64 *lockh, void *data, __u64 *bits)
1664 {
1665         ENTRY;
1666         EXP_CHECK_MD_OP(exp, set_lock_data);
1667         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
1668         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
1669 }
1670
1671 static inline int md_cancel_unused(struct obd_export *exp,
1672                                    const struct lu_fid *fid,
1673                                    ldlm_policy_data_t *policy,
1674                                    ldlm_mode_t mode,
1675                                    ldlm_cancel_flags_t flags,
1676                                    void *opaque)
1677 {
1678         int rc;
1679         ENTRY;
1680
1681         EXP_CHECK_MD_OP(exp, cancel_unused);
1682         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
1683
1684         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
1685                                               flags, opaque);
1686         RETURN(rc);
1687 }
1688
1689 static inline ldlm_mode_t md_lock_match(struct obd_export *exp, __u64 flags,
1690                                         const struct lu_fid *fid,
1691                                         ldlm_type_t type,
1692                                         ldlm_policy_data_t *policy,
1693                                         ldlm_mode_t mode,
1694                                         struct lustre_handle *lockh)
1695 {
1696         ENTRY;
1697         EXP_CHECK_MD_OP(exp, lock_match);
1698         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
1699         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
1700                                              policy, mode, lockh));
1701 }
1702
1703 static inline int md_init_ea_size(struct obd_export *exp, int easize,
1704                                   int def_asize, int cookiesize,
1705                                   int def_cookiesize)
1706 {
1707         ENTRY;
1708         EXP_CHECK_MD_OP(exp, init_ea_size);
1709         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
1710         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, easize, def_asize,
1711                                                cookiesize, def_cookiesize));
1712 }
1713
1714 static inline int md_get_remote_perm(struct obd_export *exp,
1715                                      const struct lu_fid *fid,
1716                                      struct obd_capa *oc, __u32 suppgid,
1717                                      struct ptlrpc_request **request)
1718 {
1719         ENTRY;
1720         EXP_CHECK_MD_OP(exp, get_remote_perm);
1721         EXP_MD_COUNTER_INCREMENT(exp, get_remote_perm);
1722         RETURN(MDP(exp->exp_obd, get_remote_perm)(exp, fid, oc, suppgid,
1723                                                   request));
1724 }
1725
1726 static inline int md_renew_capa(struct obd_export *exp, struct obd_capa *ocapa,
1727                                 renew_capa_cb_t cb)
1728 {
1729         int rc;
1730         ENTRY;
1731         EXP_CHECK_MD_OP(exp, renew_capa);
1732         EXP_MD_COUNTER_INCREMENT(exp, renew_capa);
1733         rc = MDP(exp->exp_obd, renew_capa)(exp, ocapa, cb);
1734         RETURN(rc);
1735 }
1736
1737 static inline int md_unpack_capa(struct obd_export *exp,
1738                                  struct ptlrpc_request *req,
1739                                  const struct req_msg_field *field,
1740                                  struct obd_capa **oc)
1741 {
1742         int rc;
1743         ENTRY;
1744         EXP_CHECK_MD_OP(exp, unpack_capa);
1745         EXP_MD_COUNTER_INCREMENT(exp, unpack_capa);
1746         rc = MDP(exp->exp_obd, unpack_capa)(exp, req, field, oc);
1747         RETURN(rc);
1748 }
1749
1750 static inline int md_intent_getattr_async(struct obd_export *exp,
1751                                           struct md_enqueue_info *minfo,
1752                                           struct ldlm_enqueue_info *einfo)
1753 {
1754         int rc;
1755         ENTRY;
1756         EXP_CHECK_MD_OP(exp, intent_getattr_async);
1757         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
1758         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo, einfo);
1759         RETURN(rc);
1760 }
1761
1762 static inline int md_revalidate_lock(struct obd_export *exp,
1763                                      struct lookup_intent *it,
1764                                      struct lu_fid *fid, __u64 *bits)
1765 {
1766         int rc;
1767         ENTRY;
1768         EXP_CHECK_MD_OP(exp, revalidate_lock);
1769         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
1770         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
1771         RETURN(rc);
1772 }
1773
1774 static inline int md_get_fid_from_lsm(struct obd_export *exp,
1775                                       const struct lmv_stripe_md *lsm,
1776                                       const char *name, int namelen,
1777                                       struct lu_fid *fid)
1778 {
1779         int rc;
1780         ENTRY;
1781         EXP_CHECK_MD_OP(exp, get_fid_from_lsm);
1782         EXP_MD_COUNTER_INCREMENT(exp, get_fid_from_lsm);
1783         rc = MDP(exp->exp_obd, get_fid_from_lsm)(exp, lsm, name, namelen, fid);
1784         RETURN(rc);
1785 }
1786
1787 /* OBD Metadata Support */
1788
1789 extern int obd_init_caches(void);
1790 extern void obd_cleanup_caches(void);
1791
1792 /* support routines */
1793 extern struct kmem_cache *obdo_cachep;
1794
1795 #define OBDO_ALLOC(ptr)                                                       \
1796 do {                                                                          \
1797         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, GFP_NOFS);             \
1798 } while(0)
1799
1800 #define OBDO_FREE(ptr)                                                        \
1801 do {                                                                          \
1802         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1803 } while(0)
1804
1805
1806 typedef int (*register_lwp_cb)(void *data);
1807
1808 struct lwp_register_item {
1809         struct obd_export **lri_exp;
1810         register_lwp_cb     lri_cb_func;
1811         void               *lri_cb_data;
1812         struct list_head            lri_list;
1813         char                lri_name[MTI_NAME_MAXLEN];
1814 };
1815
1816 /* I'm as embarrassed about this as you are.
1817  *
1818  * <shaver> // XXX do not look into _superhack with remaining eye
1819  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1820 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1821
1822 /* obd_mount.c */
1823 #ifdef HAVE_SERVER_SUPPORT
1824 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
1825                              register_lwp_cb cb_func, void *cb_data);
1826 void lustre_deregister_lwp_item(struct obd_export **exp);
1827 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx);
1828 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx);
1829 #endif /* HAVE_SERVER_SUPPORT */
1830 int lustre_register_fs(void);
1831 int lustre_unregister_fs(void);
1832 int lustre_check_exclusion(struct super_block *sb, char *svname);
1833
1834 /* sysctl.c */
1835 extern void obd_sysctl_init (void);
1836 extern void obd_sysctl_clean (void);
1837
1838 /* uuid.c  */
1839 typedef __u8 class_uuid_t[16];
1840 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
1841
1842 /* lustre_peer.c    */
1843 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
1844 int class_add_uuid(const char *uuid, __u64 nid);
1845 int class_del_uuid (const char *uuid);
1846 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
1847 void class_init_uuidlist(void);
1848 void class_exit_uuidlist(void);
1849
1850 /* prng.c */
1851 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
1852
1853 /* statfs_pack.c */
1854 struct kstatfs;
1855 void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
1856 void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);
1857
1858 /* root squash info */
1859 struct rw_semaphore;
1860 struct root_squash_info {
1861         uid_t                   rsi_uid;
1862         gid_t                   rsi_gid;
1863         struct list_head        rsi_nosquash_nids;
1864         struct rw_semaphore     rsi_sem;
1865 };
1866
1867 int server_name2index(const char *svname, __u32 *idx, const char **endptr);
1868
1869 /* linux-module.c */
1870 extern struct miscdevice obd_psdev;
1871 int class_procfs_init(void);
1872 int class_procfs_clean(void);
1873
1874 #endif /* __LINUX_OBD_CLASS_H */