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, 2015, 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, __u64 flags2,
 105                           const char *sep);
 106
 107 int obd_zombie_impexp_init(void);
 108 void obd_zombie_impexp_stop(void);
 109 void obd_zombie_impexp_cull(void);
 110 void obd_zombie_barrier(void);
 111 void obd_exports_barrier(struct obd_device *obd);
 112 int kuc_len(int payload_len);
 113 struct kuc_hdr * kuc_ptr(void *p);
 114 void *kuc_alloc(int payload_len, int transport, int type);
 115 void kuc_free(void *p, int payload_len);
 116 int obd_get_request_slot(struct client_obd *cli);
 117 void obd_put_request_slot(struct client_obd *cli);
 118 __u32 obd_get_max_rpcs_in_flight(struct client_obd *cli);
 119 int obd_set_max_rpcs_in_flight(struct client_obd *cli, __u32 max);
 120 __u16 obd_get_max_mod_rpcs_in_flight(struct client_obd *cli);
 121 int obd_set_max_mod_rpcs_in_flight(struct client_obd *cli, __u16 max);
 122 int obd_mod_rpc_stats_seq_show(struct client_obd *cli, struct seq_file *seq);
 123
 124 __u16 obd_get_mod_rpc_slot(struct client_obd *cli, __u32 opc,
 125                            struct lookup_intent *it);
 126 void obd_put_mod_rpc_slot(struct client_obd *cli, __u32 opc,
 127                           struct lookup_intent *it, __u16 tag);
 128
 129 struct llog_handle;
 130 struct llog_rec_hdr;
 131 typedef int (*llog_cb_t)(const struct lu_env *, struct llog_handle *,
 132                          struct llog_rec_hdr *, void *);
 133
 134 extern atomic_t         obd_stale_export_num;
 135 extern struct list_head obd_stale_exports;
 136 extern spinlock_t       obd_stale_export_lock;
 137
 138 struct obd_export *obd_stale_export_get(void);
 139 void obd_stale_export_put(struct obd_export *exp);
 140 void obd_stale_export_adjust(struct obd_export *exp);
 141
 142 /* obd_config.c */
 143 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
 144                                      const char *new_name);
 145 int class_process_config(struct lustre_cfg *lcfg);
 146 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 147                              struct lustre_cfg *lcfg, void *data);
 148 int class_attach(struct lustre_cfg *lcfg);
 149 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
 150 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg);
 151 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg);
 152 struct obd_device *class_incref(struct obd_device *obd,
 153                                 const char *scope, const void *source);
 154 void class_decref(struct obd_device *obd,
 155                   const char *scope, const void *source);
 156 void dump_exports(struct obd_device *obd, int locks);
 157 int class_config_llog_handler(const struct lu_env *env,
 158                               struct llog_handle *handle,
 159                               struct llog_rec_hdr *rec, void *data);
 160 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg);
 161 int class_add_uuid(const char *uuid, __u64 nid);
 162
 163 #define CFG_F_START     0x01   /* Set when we start updating from a log */
 164 #define CFG_F_MARKER    0x02   /* We are within a maker */
 165 #define CFG_F_SKIP      0x04   /* We should ignore this cfg command */
 166 #define CFG_F_COMPAT146 0x08   /* Allow old-style logs */
 167 #define CFG_F_EXCLUDE   0x10   /* OST exclusion list */
 168
 169 /* Passed as data param to class_config_parse_llog */
 170 struct config_llog_instance {
 171         char                    *cfg_obdname;
 172         void                    *cfg_instance;
 173         struct super_block      *cfg_sb;
 174         struct obd_uuid          cfg_uuid;
 175         llog_cb_t                cfg_callback;
 176         int                      cfg_last_idx; /* for partial llog processing */
 177         int                      cfg_flags;
 178         __u32                    cfg_lwp_idx;
 179 };
 180 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 181                             char *name, struct config_llog_instance *cfg);
 182
 183 enum {
 184         CONFIG_T_CONFIG  = 0,
 185         CONFIG_T_SPTLRPC = 1,
 186         CONFIG_T_RECOVER = 2,
 187         CONFIG_T_PARAMS  = 3,
 188         CONFIG_T_NODEMAP = 4,
 189         CONFIG_T_MAX     = 5
 190 };
 191
 192 #define PARAMS_FILENAME         "params"
 193 #define LCTL_UPCALL             "lctl"
 194
 195 /* list of active configuration logs  */
 196 struct config_llog_data {
 197         struct ldlm_res_id          cld_resid;
 198         struct config_llog_instance cld_cfg;
 199         struct list_head            cld_list_chain;
 200         atomic_t                    cld_refcount;
 201         struct config_llog_data    *cld_sptlrpc;/* depended sptlrpc log */
 202         struct config_llog_data    *cld_params; /* common parameters log */
 203         struct config_llog_data    *cld_recover;/* imperative recover log */
 204         struct config_llog_data    *cld_nodemap;/* nodemap log */
 205         struct obd_export          *cld_mgcexp;
 206         struct mutex                cld_lock;
 207         int                         cld_type;
 208         unsigned int                cld_stopping:1, /* we were told to stop
 209                                                      * watching */
 210                                     cld_lostlock:1; /* lock not requeued */
 211         char                        cld_logname[0];
 212 };
 213
 214 struct lustre_profile {
 215         struct list_head         lp_list;
 216         char                    *lp_profile;
 217         char                    *lp_dt;
 218         char                    *lp_md;
 219         int                      lp_refs;
 220         bool                     lp_list_deleted;
 221 };
 222
 223 struct lustre_profile *class_get_profile(const char * prof);
 224 void class_del_profile(const char *prof);
 225 void class_put_profile(struct lustre_profile *lprof);
 226 void class_del_profiles(void);
 227
 228
 229 #if LUSTRE_TRACKS_LOCK_EXP_REFS
 230
 231 void __class_export_add_lock_ref(struct obd_export *, struct ldlm_lock *);
 232 void __class_export_del_lock_ref(struct obd_export *, struct ldlm_lock *);
 233 extern void (*class_export_dump_hook)(struct obd_export *);
 234
 235 #else
 236
 237 #define __class_export_add_lock_ref(exp, lock)             do {} while(0)
 238 #define __class_export_del_lock_ref(exp, lock)             do {} while(0)
 239
 240 #endif
 241
 242 #define class_export_rpc_inc(exp)                                       \
 243 ({                                                                      \
 244         atomic_inc(&(exp)->exp_rpc_count);                              \
 245         CDEBUG(D_INFO, "RPC GETting export %p : new rpc_count %d\n",    \
 246                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 247 })
 248
 249 #define class_export_rpc_dec(exp)                                       \
 250 ({                                                                      \
 251         LASSERT_ATOMIC_POS(&exp->exp_rpc_count);                        \
 252         atomic_dec(&(exp)->exp_rpc_count);                              \
 253         CDEBUG(D_INFO, "RPC PUTting export %p : new rpc_count %d\n",    \
 254                (exp), atomic_read(&(exp)->exp_rpc_count));              \
 255 })
 256
 257 #define class_export_lock_get(exp, lock)                                \
 258 ({                                                                      \
 259         atomic_inc(&(exp)->exp_locks_count);                            \
 260         __class_export_add_lock_ref(exp, lock);                         \
 261         CDEBUG(D_INFO, "lock GETting export %p : new locks_count %d\n", \
 262                (exp), atomic_read(&(exp)->exp_locks_count));            \
 263         class_export_get(exp);                                          \
 264 })
 265
 266 #define class_export_lock_put(exp, lock)                                \
 267 ({                                                                      \
 268         LASSERT_ATOMIC_POS(&exp->exp_locks_count);                      \
 269         atomic_dec(&(exp)->exp_locks_count);                            \
 270         __class_export_del_lock_ref(exp, lock);                         \
 271         CDEBUG(D_INFO, "lock PUTting export %p : new locks_count %d\n", \
 272                (exp), atomic_read(&(exp)->exp_locks_count));            \
 273         class_export_put(exp);                                          \
 274 })
 275
 276 #define class_export_cb_get(exp)                                        \
 277 ({                                                                      \
 278         atomic_inc(&(exp)->exp_cb_count);                               \
 279         CDEBUG(D_INFO, "callback GETting export %p : new cb_count %d\n",\
 280                (exp), atomic_read(&(exp)->exp_cb_count));               \
 281         class_export_get(exp);                                          \
 282 })
 283
 284 #define class_export_cb_put(exp)                                        \
 285 ({                                                                      \
 286         LASSERT_ATOMIC_POS(&exp->exp_cb_count);                         \
 287         atomic_dec(&(exp)->exp_cb_count);                               \
 288         CDEBUG(D_INFO, "callback PUTting export %p : new cb_count %d\n",\
 289                (exp), atomic_read(&(exp)->exp_cb_count));               \
 290         class_export_put(exp);                                          \
 291 })
 292
 293 /* genops.c */
 294 struct obd_export *class_export_get(struct obd_export *exp);
 295 void class_export_put(struct obd_export *exp);
 296 struct obd_export *class_new_export(struct obd_device *obddev,
 297                                     struct obd_uuid *cluuid);
 298 void class_unlink_export(struct obd_export *exp);
 299
 300 struct obd_import *class_import_get(struct obd_import *);
 301 void class_import_put(struct obd_import *);
 302 struct obd_import *class_new_import(struct obd_device *obd);
 303 void class_destroy_import(struct obd_import *exp);
 304
 305 struct obd_type *class_search_type(const char *name);
 306 struct obd_type *class_get_type(const char *name);
 307 void class_put_type(struct obd_type *type);
 308 int class_connect(struct lustre_handle *conn, struct obd_device *obd,
 309                   struct obd_uuid *cluuid);
 310 int class_disconnect(struct obd_export *exp);
 311 void class_fail_export(struct obd_export *exp);
 312 int class_connected_export(struct obd_export *exp);
 313 void class_disconnect_exports(struct obd_device *obddev);
 314 int class_manual_cleanup(struct obd_device *obd);
 315 void class_disconnect_stale_exports(struct obd_device *,
 316                                     int (*test_export)(struct obd_export *));
 317 static inline enum obd_option exp_flags_from_obd(struct obd_device *obd)
 318 {
 319         return ((obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 320                 (obd->obd_force ? OBD_OPT_FORCE : 0) |
 321                 (obd->obd_abort_recovery ? OBD_OPT_ABORT_RECOV : 0) |
 322                 0);
 323 }
 324
 325 #ifdef HAVE_SERVER_SUPPORT
 326 static inline struct lu_target *class_exp2tgt(struct obd_export *exp)
 327 {
 328         LASSERT(exp->exp_obd);
 329         if (exp->exp_obd->u.obt.obt_magic != OBT_MAGIC)
 330                 return NULL;
 331         return exp->exp_obd->u.obt.obt_lut;
 332 }
 333
 334 static inline struct lr_server_data *class_server_data(struct obd_device *obd)
 335 {
 336         LASSERT(obd->u.obt.obt_lut);
 337         return &obd->u.obt.obt_lut->lut_lsd;
 338 }
 339 #endif
 340
 341 /* obdo.c */
 342 struct lu_attr;
 343 struct inode;
 344
 345 void obdo_from_la(struct obdo *dst, const struct lu_attr *la, u64 valid);
 346 void la_from_obdo(struct lu_attr *la, const struct obdo *dst, u64 valid);
 347
 348 void obdo_cpy_md(struct obdo *dst, const struct obdo *src, u64 valid);
 349 void obdo_to_ioobj(const struct obdo *oa, struct obd_ioobj *ioobj);
 350
 351 #define OBT(dev)        (dev)->obd_type
 352 #define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 353 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
 354 #define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
 355
 356 /* Ensure obd_setup: used for cleanup which must be called
 357    while obd is stopping */
 358 #define OBD_CHECK_DEV(obd)                                      \
 359 do {                                                            \
 360         if (!(obd)) {                                           \
 361                 CERROR("NULL device\n");                        \
 362                 RETURN(-ENODEV);                                \
 363         }                                                       \
 364 } while (0)
 365
 366 /* ensure obd_setup and !obd_stopping */
 367 #define OBD_CHECK_DEV_ACTIVE(obd)                               \
 368 do {                                                            \
 369         OBD_CHECK_DEV(obd);                                     \
 370         if (!(obd)->obd_set_up || (obd)->obd_stopping) {        \
 371                 CERROR("Device %d not setup\n",                 \
 372                        (obd)->obd_minor);                       \
 373                 RETURN(-ENODEV);                                \
 374         }                                                       \
 375 } while (0)
 376
 377
 378 #ifdef CONFIG_PROC_FS
 379 #define OBD_COUNTER_OFFSET(op)                                                 \
 380         ((offsetof(struct obd_ops, o_ ## op) -                                 \
 381           offsetof(struct obd_ops, o_iocontrol))                               \
 382          / sizeof(((struct obd_ops *)NULL)->o_iocontrol))
 383
 384 /* The '- 1' below is for o_owner. */
 385 #define NUM_OBD_STATS                                                          \
 386         (sizeof(struct obd_ops) /                                              \
 387          sizeof(((struct obd_ops *)NULL)->o_iocontrol) - 1)
 388
 389 #define OBD_COUNTER_INCREMENT(obd, op)                                         \
 390         lprocfs_counter_incr((obd)->obd_stats,                                 \
 391                              (obd)->obd_cntr_base + OBD_COUNTER_OFFSET(op))
 392
 393 #define EXP_COUNTER_INCREMENT(exp, op)                                         \
 394         do {                                                                   \
 395                 unsigned int _off;                                             \
 396                 _off = (exp)->exp_obd->obd_cntr_base + OBD_COUNTER_OFFSET(op); \
 397                 lprocfs_counter_incr((exp)->exp_obd->obd_stats, _off);         \
 398                 if ((exp)->exp_obd->obd_uses_nid_stats &&                      \
 399                     (exp)->exp_nid_stats != NULL)                              \
 400                         lprocfs_counter_incr((exp)->exp_nid_stats->nid_stats,  \
 401                                              _off);                            \
 402         } while (0)
 403
 404 #define _MD_COUNTER_OFFSET(m_op)                                               \
 405         ((offsetof(struct md_ops, m_op) -                                      \
 406           offsetof(struct md_ops, MD_STATS_FIRST_OP)) /                        \
 407          sizeof(((struct md_ops *)NULL)->MD_STATS_FIRST_OP))
 408
 409 #define MD_COUNTER_OFFSET(op) _MD_COUNTER_OFFSET(m_ ## op)
 410
 411 #define NUM_MD_STATS                                                           \
 412         (_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) -                                \
 413          _MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) + 1)
 414
 415 /* Note that we only increment md counters for ops whose offset is less
 416  * than NUM_MD_STATS. This is explained in a comment in the definition
 417  * of struct md_ops. */
 418 #define EXP_MD_COUNTER_INCREMENT(exp, op)                                      \
 419         do {                                                                   \
 420                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS)                      \
 421                         lprocfs_counter_incr((exp)->exp_obd->obd_md_stats,     \
 422                                         (exp)->exp_obd->obd_md_cntr_base +     \
 423                                         MD_COUNTER_OFFSET(op));                \
 424         } while (0)
 425
 426 #else
 427 #define OBD_COUNTER_OFFSET(op)
 428 #define OBD_COUNTER_INCREMENT(obd, op)
 429 #define EXP_COUNTER_INCREMENT(exp, op)
 430 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 431 #endif
 432
 433 static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
 434 {
 435         /* Always add in ldlm_stats */
 436         tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC
 437                                                   ,LPROCFS_STATS_FLAG_NOPERCPU);
 438         if (tmp->nid_ldlm_stats == NULL)
 439                 return -ENOMEM;
 440
 441         lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
 442
 443         return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
 444                                       tmp->nid_ldlm_stats);
 445 }
 446
 447 #define EXP_CHECK_MD_OP(exp, op)                                \
 448 do {                                                            \
 449         if ((exp) == NULL) {                                    \
 450                 CERROR("obd_" #op ": NULL export\n");           \
 451                 RETURN(-ENODEV);                                \
 452         }                                                       \
 453         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 454                 CERROR("obd_" #op ": cleaned up obd\n");        \
 455                 RETURN(-EOPNOTSUPP);                            \
 456         }                                                       \
 457         if (!OBT((exp)->exp_obd) || !MDP((exp)->exp_obd, op)) { \
 458                 CERROR("obd_" #op ": dev %s/%d no operation\n", \
 459                        (exp)->exp_obd->obd_name,                \
 460                        (exp)->exp_obd->obd_minor);              \
 461                 RETURN(-EOPNOTSUPP);                            \
 462         }                                                       \
 463 } while (0)
 464
 465
 466 #define OBD_CHECK_DT_OP(obd, op, err)                           \
 467 do {                                                            \
 468         if (!OBT(obd) || !OBP((obd), op)) {                     \
 469                 if (err)                                        \
 470                         CERROR("obd_" #op ": dev %d no operation\n",    \
 471                                obd->obd_minor);                 \
 472                 RETURN(err);                                    \
 473         }                                                       \
 474 } while (0)
 475
 476 #define EXP_CHECK_DT_OP(exp, op)                                \
 477 do {                                                            \
 478         if ((exp) == NULL) {                                    \
 479                 CERROR("obd_" #op ": NULL export\n");           \
 480                 RETURN(-ENODEV);                                \
 481         }                                                       \
 482         if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
 483                 CERROR("obd_" #op ": cleaned up obd\n");        \
 484                 RETURN(-EOPNOTSUPP);                            \
 485         }                                                       \
 486         if (!OBT((exp)->exp_obd) || !OBP((exp)->exp_obd, op)) { \
 487                 CERROR("obd_" #op ": dev %d no operation\n",    \
 488                        (exp)->exp_obd->obd_minor);              \
 489                 RETURN(-EOPNOTSUPP);                            \
 490         }                                                       \
 491 } while (0)
 492
 493 #define CTXT_CHECK_OP(ctxt, op, err)                                 \
 494 do {                                                                 \
 495         if (!OBT(ctxt->loc_obd) || !CTXTP((ctxt), op)) {             \
 496                 if (err)                                             \
 497                         CERROR("lop_" #op ": dev %d no operation\n", \
 498                                ctxt->loc_obd->obd_minor);            \
 499                 RETURN(err);                                         \
 500         }                                                            \
 501 } while (0)
 502
 503 static inline int class_devno_max(void)
 504 {
 505         return MAX_OBD_DEVICES;
 506 }
 507
 508 static inline int obd_get_info(const struct lu_env *env, struct obd_export *exp,
 509                                __u32 keylen, void *key,
 510                                __u32 *vallen, void *val)
 511 {
 512         int rc;
 513         ENTRY;
 514
 515         EXP_CHECK_DT_OP(exp, get_info);
 516         EXP_COUNTER_INCREMENT(exp, get_info);
 517
 518         rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val);
 519         RETURN(rc);
 520 }
 521
 522 static inline int obd_set_info_async(const struct lu_env *env,
 523                                      struct obd_export *exp,
 524                                      __u32 keylen, void *key,
 525                                      __u32 vallen, void *val,
 526                                      struct ptlrpc_request_set *set)
 527 {
 528         int rc;
 529         ENTRY;
 530
 531         EXP_CHECK_DT_OP(exp, set_info_async);
 532         EXP_COUNTER_INCREMENT(exp, set_info_async);
 533
 534         rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
 535                                                val, set);
 536         RETURN(rc);
 537 }
 538
 539 /*
 540  * obd-lu integration.
 541  *
 542  * Functionality is being moved into new lu_device-based layering, but some
 543  * pieces of configuration process are still based on obd devices.
 544  *
 545  * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
 546  * subsume ->o_setup() methods of obd devices they replace. The same for
 547  * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
 548  * result, obd_setup() and obd_process_config() branch and call one XOR
 549  * another.
 550  *
 551  * Yet neither lu_device_type_operations::ldto_device_fini() nor
 552  * lu_device_type_operations::ldto_device_free() fully implement the
 553  * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
 554  * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
 555  */
 556
 557 #define DECLARE_LU_VARS(ldt, d)                 \
 558         struct lu_device_type *ldt;       \
 559         struct lu_device *d
 560
 561 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 562 {
 563         int rc;
 564         DECLARE_LU_VARS(ldt, d);
 565         ENTRY;
 566
 567         ldt = obd->obd_type->typ_lu;
 568         if (ldt != NULL) {
 569                 struct lu_context  session_ctx;
 570                 struct lu_env env;
 571                 lu_context_init(&session_ctx, LCT_SESSION | LCT_SERVER_SESSION);
 572                 session_ctx.lc_thread = NULL;
 573                 lu_context_enter(&session_ctx);
 574
 575                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 576                 if (rc == 0) {
 577                         env.le_ses = &session_ctx;
 578                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
 579                         lu_env_fini(&env);
 580                         if (!IS_ERR(d)) {
 581                                 obd->obd_lu_dev = d;
 582                                 d->ld_obd = obd;
 583                                 rc = 0;
 584                         } else
 585                                 rc = PTR_ERR(d);
 586                 }
 587                 lu_context_exit(&session_ctx);
 588                 lu_context_fini(&session_ctx);
 589
 590         } else {
 591                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
 592                 OBD_COUNTER_INCREMENT(obd, setup);
 593                 rc = OBP(obd, setup)(obd, cfg);
 594         }
 595         RETURN(rc);
 596 }
 597
 598 static inline int obd_precleanup(struct obd_device *obd)
 599 {
 600         int rc;
 601         DECLARE_LU_VARS(ldt, d);
 602         ENTRY;
 603
 604         OBD_CHECK_DEV(obd);
 605         ldt = obd->obd_type->typ_lu;
 606         d = obd->obd_lu_dev;
 607         if (ldt != NULL && d != NULL) {
 608                 struct lu_env env;
 609
 610                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 611                 if (rc == 0) {
 612                         ldt->ldt_ops->ldto_device_fini(&env, d);
 613                         lu_env_fini(&env);
 614                 }
 615         }
 616         OBD_CHECK_DT_OP(obd, precleanup, 0);
 617         OBD_COUNTER_INCREMENT(obd, precleanup);
 618
 619         rc = OBP(obd, precleanup)(obd);
 620         RETURN(rc);
 621 }
 622
 623 static inline int obd_cleanup(struct obd_device *obd)
 624 {
 625         int rc;
 626         DECLARE_LU_VARS(ldt, d);
 627         ENTRY;
 628
 629         OBD_CHECK_DEV(obd);
 630
 631         ldt = obd->obd_type->typ_lu;
 632         d = obd->obd_lu_dev;
 633         if (ldt != NULL && d != NULL) {
 634                 struct lu_env env;
 635
 636                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 637                 if (rc == 0) {
 638                         ldt->ldt_ops->ldto_device_free(&env, d);
 639                         lu_env_fini(&env);
 640                         obd->obd_lu_dev = NULL;
 641                 }
 642         }
 643         OBD_CHECK_DT_OP(obd, cleanup, 0);
 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
 672 obd_process_config(struct obd_device *obd, int datalen, void *data)
 673 {
 674         int rc;
 675         DECLARE_LU_VARS(ldt, d);
 676         ENTRY;
 677
 678         OBD_CHECK_DEV(obd);
 679
 680         obd->obd_process_conf = 1;
 681         ldt = obd->obd_type->typ_lu;
 682         d = obd->obd_lu_dev;
 683         if (ldt != NULL && d != NULL) {
 684                 struct lu_env env;
 685
 686                 rc = lu_env_init(&env, ldt->ldt_ctx_tags);
 687                 if (rc == 0) {
 688                         rc = d->ld_ops->ldo_process_config(&env, d, data);
 689                         lu_env_fini(&env);
 690                 }
 691         } else {
 692                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
 693                 rc = OBP(obd, process_config)(obd, datalen, data);
 694         }
 695         OBD_COUNTER_INCREMENT(obd, process_config);
 696         obd->obd_process_conf = 0;
 697
 698         RETURN(rc);
 699 }
 700
 701 static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
 702                              struct obdo *obdo)
 703 {
 704         int rc;
 705         ENTRY;
 706
 707         EXP_CHECK_DT_OP(exp, create);
 708         EXP_COUNTER_INCREMENT(exp, create);
 709
 710         rc = OBP(exp->exp_obd, create)(env, exp, obdo);
 711         RETURN(rc);
 712 }
 713
 714 static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
 715                               struct obdo *obdo)
 716 {
 717         int rc;
 718         ENTRY;
 719
 720         EXP_CHECK_DT_OP(exp, destroy);
 721         EXP_COUNTER_INCREMENT(exp, destroy);
 722
 723         rc = OBP(exp->exp_obd, destroy)(env, exp, obdo);
 724         RETURN(rc);
 725 }
 726
 727 static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
 728                               struct obdo *oa)
 729 {
 730         int rc;
 731
 732         ENTRY;
 733         EXP_CHECK_DT_OP(exp, getattr);
 734         EXP_COUNTER_INCREMENT(exp, getattr);
 735         rc = OBP(exp->exp_obd, getattr)(env, exp, oa);
 736
 737         RETURN(rc);
 738 }
 739
 740 static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
 741                               struct obdo *oa)
 742 {
 743         int rc;
 744
 745         ENTRY;
 746         EXP_CHECK_DT_OP(exp, setattr);
 747         EXP_COUNTER_INCREMENT(exp, setattr);
 748         rc = OBP(exp->exp_obd, setattr)(env, exp, oa);
 749
 750         RETURN(rc);
 751 }
 752
 753 static inline int obd_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
 754                                int priority)
 755 {
 756         struct obd_device *obd = imp->imp_obd;
 757         int rc;
 758         ENTRY;
 759
 760         OBD_CHECK_DEV_ACTIVE(obd);
 761         OBD_CHECK_DT_OP(obd, add_conn, -EOPNOTSUPP);
 762         OBD_COUNTER_INCREMENT(obd, add_conn);
 763
 764         rc = OBP(obd, add_conn)(imp, uuid, priority);
 765         RETURN(rc);
 766 }
 767
 768 static inline int obd_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
 769 {
 770         struct obd_device *obd = imp->imp_obd;
 771         int rc;
 772         ENTRY;
 773
 774         OBD_CHECK_DEV_ACTIVE(obd);
 775         OBD_CHECK_DT_OP(obd, del_conn, -EOPNOTSUPP);
 776         OBD_COUNTER_INCREMENT(obd, del_conn);
 777
 778         rc = OBP(obd, del_conn)(imp, uuid);
 779         RETURN(rc);
 780 }
 781
 782 static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
 783 {
 784         struct obd_uuid *uuid;
 785         ENTRY;
 786
 787         OBD_CHECK_DT_OP(exp->exp_obd, get_uuid, NULL);
 788         EXP_COUNTER_INCREMENT(exp, get_uuid);
 789
 790         uuid = OBP(exp->exp_obd, get_uuid)(exp);
 791         RETURN(uuid);
 792 }
 793
 794 /** Create a new /a exp on device /a obd for the uuid /a cluuid
 795  * @param exp New export handle
 796  * @param d Connect data, supported flags are set, flags also understood
 797  *    by obd are returned.
 798  */
 799 static inline int obd_connect(const struct lu_env *env,
 800                               struct obd_export **exp,struct obd_device *obd,
 801                               struct obd_uuid *cluuid,
 802                               struct obd_connect_data *data,
 803                               void *localdata)
 804 {
 805         int rc;
 806         __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
 807                                                    * check */
 808         ENTRY;
 809
 810         OBD_CHECK_DEV_ACTIVE(obd);
 811         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
 812         OBD_COUNTER_INCREMENT(obd, connect);
 813
 814         rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 815         /* check that only subset is granted */
 816         LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
 817                                     data->ocd_connect_flags));
 818         RETURN(rc);
 819 }
 820
 821 static inline int obd_reconnect(const struct lu_env *env,
 822                                 struct obd_export *exp,
 823                                 struct obd_device *obd,
 824                                 struct obd_uuid *cluuid,
 825                                 struct obd_connect_data *d,
 826                                 void *localdata)
 827 {
 828         int rc;
 829         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
 830                                                    * check */
 831
 832         ENTRY;
 833
 834         OBD_CHECK_DEV_ACTIVE(obd);
 835         OBD_CHECK_DT_OP(obd, reconnect, 0);
 836         OBD_COUNTER_INCREMENT(obd, reconnect);
 837
 838         rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 839         /* check that only subset is granted */
 840         LASSERT(ergo(d != NULL,
 841                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 842         RETURN(rc);
 843 }
 844
 845 static inline int obd_disconnect(struct obd_export *exp)
 846 {
 847         int rc;
 848         ENTRY;
 849
 850         EXP_CHECK_DT_OP(exp, disconnect);
 851         EXP_COUNTER_INCREMENT(exp, disconnect);
 852
 853         rc = OBP(exp->exp_obd, disconnect)(exp);
 854         RETURN(rc);
 855 }
 856
 857 static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
 858                                enum lu_cli_type type)
 859 {
 860         int rc;
 861         ENTRY;
 862
 863         OBD_CHECK_DT_OP(obd, fid_init, 0);
 864         OBD_COUNTER_INCREMENT(obd, fid_init);
 865
 866         rc = OBP(obd, fid_init)(obd, exp, type);
 867         RETURN(rc);
 868 }
 869
 870 static inline int obd_fid_fini(struct obd_device *obd)
 871 {
 872         int rc;
 873         ENTRY;
 874
 875         OBD_CHECK_DT_OP(obd, fid_fini, 0);
 876         OBD_COUNTER_INCREMENT(obd, fid_fini);
 877
 878         rc = OBP(obd, fid_fini)(obd);
 879         RETURN(rc);
 880 }
 881
 882 static inline int obd_fid_alloc(const struct lu_env *env,
 883                                 struct obd_export *exp,
 884                                 struct lu_fid *fid,
 885                                 struct md_op_data *op_data)
 886 {
 887         int rc;
 888         ENTRY;
 889
 890         EXP_CHECK_DT_OP(exp, fid_alloc);
 891         EXP_COUNTER_INCREMENT(exp, fid_alloc);
 892
 893         rc = OBP(exp->exp_obd, fid_alloc)(env, exp, fid, op_data);
 894         RETURN(rc);
 895 }
 896
 897 static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
 898 {
 899         int rc;
 900         ENTRY;
 901
 902         OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
 903         EXP_COUNTER_INCREMENT(exp, ping);
 904
 905         rc = OBP(exp->exp_obd, ping)(env, exp);
 906         RETURN(rc);
 907 }
 908
 909 static inline int obd_pool_new(struct obd_device *obd, char *poolname)
 910 {
 911         int rc;
 912         ENTRY;
 913
 914         OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
 915         OBD_COUNTER_INCREMENT(obd, pool_new);
 916
 917         rc = OBP(obd, pool_new)(obd, poolname);
 918         RETURN(rc);
 919 }
 920
 921 static inline int obd_pool_del(struct obd_device *obd, char *poolname)
 922 {
 923         int rc;
 924         ENTRY;
 925
 926         OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
 927         OBD_COUNTER_INCREMENT(obd, pool_del);
 928
 929         rc = OBP(obd, pool_del)(obd, poolname);
 930         RETURN(rc);
 931 }
 932
 933 static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
 934 {
 935         int rc;
 936         ENTRY;
 937
 938         OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
 939         OBD_COUNTER_INCREMENT(obd, pool_add);
 940
 941         rc = OBP(obd, pool_add)(obd, poolname, ostname);
 942         RETURN(rc);
 943 }
 944
 945 static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
 946 {
 947         int rc;
 948         ENTRY;
 949
 950         OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
 951         OBD_COUNTER_INCREMENT(obd, pool_rem);
 952
 953         rc = OBP(obd, pool_rem)(obd, poolname, ostname);
 954         RETURN(rc);
 955 }
 956
 957 static inline void obd_getref(struct obd_device *obd)
 958 {
 959         ENTRY;
 960         if (OBT(obd) && OBP(obd, getref)) {
 961                 OBD_COUNTER_INCREMENT(obd, getref);
 962                 OBP(obd, getref)(obd);
 963         }
 964         EXIT;
 965 }
 966
 967 static inline void obd_putref(struct obd_device *obd)
 968 {
 969         ENTRY;
 970         if (OBT(obd) && OBP(obd, putref)) {
 971                 OBD_COUNTER_INCREMENT(obd, putref);
 972                 OBP(obd, putref)(obd);
 973         }
 974         EXIT;
 975 }
 976
 977 static inline int obd_init_export(struct obd_export *exp)
 978 {
 979         int rc = 0;
 980
 981         ENTRY;
 982         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
 983             OBP((exp)->exp_obd, init_export))
 984                 rc = OBP(exp->exp_obd, init_export)(exp);
 985         RETURN(rc);
 986 }
 987
 988 static inline int obd_destroy_export(struct obd_export *exp)
 989 {
 990         ENTRY;
 991         if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
 992             OBP((exp)->exp_obd, destroy_export))
 993                 OBP(exp->exp_obd, destroy_export)(exp);
 994         RETURN(0);
 995 }
 996
 997 /* @max_age is the oldest time in jiffies that we accept using a cached data.
 998  * If the cache is older than @max_age we will get a new value from the
 999  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1000 static inline int obd_statfs_async(struct obd_export *exp,
1001                                    struct obd_info *oinfo,
1002                                    __u64 max_age,
1003                                    struct ptlrpc_request_set *rqset)
1004 {
1005         int rc = 0;
1006         struct obd_device *obd;
1007         ENTRY;
1008
1009         if (exp == NULL || exp->exp_obd == NULL)
1010                 RETURN(-EINVAL);
1011
1012         obd = exp->exp_obd;
1013         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1014         OBD_COUNTER_INCREMENT(obd, statfs);
1015
1016         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
1017                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
1018         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1019                 rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
1020         } else {
1021                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
1022                        " objects "LPU64"/"LPU64"\n",
1023                        obd->obd_name, &obd->obd_osfs,
1024                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1025                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1026                 spin_lock(&obd->obd_osfs_lock);
1027                 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
1028                 spin_unlock(&obd->obd_osfs_lock);
1029                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
1030                 if (oinfo->oi_cb_up)
1031                         oinfo->oi_cb_up(oinfo, 0);
1032         }
1033         RETURN(rc);
1034 }
1035
1036 static inline int obd_statfs_rqset(struct obd_export *exp,
1037                                    struct obd_statfs *osfs, __u64 max_age,
1038                                    __u32 flags)
1039 {
1040         struct ptlrpc_request_set *set = NULL;
1041         struct obd_info oinfo = {
1042                 .oi_osfs = osfs,
1043                 .oi_flags = flags,
1044         };
1045         int rc = 0;
1046
1047         ENTRY;
1048
1049         set = ptlrpc_prep_set();
1050         if (set == NULL)
1051                 RETURN(-ENOMEM);
1052
1053         rc = obd_statfs_async(exp, &oinfo, max_age, set);
1054         if (rc == 0)
1055                 rc = ptlrpc_set_wait(set);
1056
1057         ptlrpc_set_destroy(set);
1058
1059         RETURN(rc);
1060 }
1061
1062 /* @max_age is the oldest time in jiffies that we accept using a cached data.
1063  * If the cache is older than @max_age we will get a new value from the
1064  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
1065 static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
1066                              struct obd_statfs *osfs, __u64 max_age,
1067                              __u32 flags)
1068 {
1069         int rc = 0;
1070         struct obd_device *obd = exp->exp_obd;
1071         ENTRY;
1072
1073         if (obd == NULL)
1074                 RETURN(-EINVAL);
1075
1076         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
1077         OBD_COUNTER_INCREMENT(obd, statfs);
1078
1079         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
1080                obd->obd_osfs_age, max_age);
1081         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
1082                 rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
1083                 if (rc == 0) {
1084                         spin_lock(&obd->obd_osfs_lock);
1085                         memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
1086                         obd->obd_osfs_age = cfs_time_current_64();
1087                         spin_unlock(&obd->obd_osfs_lock);
1088                 }
1089         } else {
1090                 CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
1091                        " objects "LPU64"/"LPU64"\n",
1092                        obd->obd_name, &obd->obd_osfs,
1093                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
1094                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
1095                 spin_lock(&obd->obd_osfs_lock);
1096                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1097                 spin_unlock(&obd->obd_osfs_lock);
1098         }
1099         RETURN(rc);
1100 }
1101
1102 static inline int obd_preprw(const struct lu_env *env, int cmd,
1103                              struct obd_export *exp, struct obdo *oa,
1104                              int objcount, struct obd_ioobj *obj,
1105                              struct niobuf_remote *remote, int *pages,
1106                              struct niobuf_local *local)
1107 {
1108         int rc;
1109
1110         ENTRY;
1111         EXP_CHECK_DT_OP(exp, preprw);
1112         EXP_COUNTER_INCREMENT(exp, preprw);
1113         rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
1114                                        pages, local);
1115
1116         RETURN(rc);
1117 }
1118
1119 static inline int obd_commitrw(const struct lu_env *env, int cmd,
1120                                struct obd_export *exp, struct obdo *oa,
1121                                int objcount, struct obd_ioobj *obj,
1122                                struct niobuf_remote *rnb, int pages,
1123                                struct niobuf_local *local, int rc)
1124 {
1125         ENTRY;
1126
1127         EXP_CHECK_DT_OP(exp, commitrw);
1128         EXP_COUNTER_INCREMENT(exp, commitrw);
1129         rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
1130                                          rnb, pages, local, rc);
1131
1132         RETURN(rc);
1133 }
1134
1135 static inline int obd_iocontrol(unsigned int cmd, struct obd_export *exp,
1136                                 int len, void *karg, void __user *uarg)
1137 {
1138         int rc;
1139         ENTRY;
1140
1141         EXP_CHECK_DT_OP(exp, iocontrol);
1142         EXP_COUNTER_INCREMENT(exp, iocontrol);
1143
1144         rc = OBP(exp->exp_obd, iocontrol)(cmd, exp, len, karg, uarg);
1145         RETURN(rc);
1146 }
1147
1148 static inline void obd_import_event(struct obd_device *obd,
1149                                     struct obd_import *imp,
1150                                     enum obd_import_event event)
1151 {
1152         ENTRY;
1153         if (!obd) {
1154                 CERROR("NULL device\n");
1155                 EXIT;
1156                 return;
1157         }
1158         if (obd->obd_set_up && OBP(obd, import_event)) {
1159                 OBD_COUNTER_INCREMENT(obd, import_event);
1160                 OBP(obd, import_event)(obd, imp, event);
1161         }
1162         EXIT;
1163 }
1164
1165 static inline int obd_notify(struct obd_device *obd,
1166                              struct obd_device *watched,
1167                              enum obd_notify_event ev,
1168                              void *data)
1169 {
1170         int rc;
1171         ENTRY;
1172         OBD_CHECK_DEV(obd);
1173
1174         if (!obd->obd_set_up) {
1175                 CDEBUG(D_HA, "obd %s not set up\n", obd->obd_name);
1176                 RETURN(-EINVAL);
1177         }
1178
1179         if (!OBP(obd, notify)) {
1180                 CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
1181                 RETURN(-ENOSYS);
1182         }
1183
1184         OBD_COUNTER_INCREMENT(obd, notify);
1185         rc = OBP(obd, notify)(obd, watched, ev, data);
1186         RETURN(rc);
1187 }
1188
1189 static inline int obd_notify_observer(struct obd_device *observer,
1190                                       struct obd_device *observed,
1191                                       enum obd_notify_event ev,
1192                                       void *data)
1193 {
1194         int rc1;
1195         int rc2;
1196
1197         struct obd_notify_upcall *onu;
1198
1199         if (observer->obd_observer)
1200                 rc1 = obd_notify(observer->obd_observer, observed, ev, data);
1201         else
1202                 rc1 = 0;
1203         /*
1204          * Also, call non-obd listener, if any
1205          */
1206         onu = &observer->obd_upcall;
1207         if (onu->onu_upcall != NULL)
1208                 rc2 = onu->onu_upcall(observer, observed, ev,
1209                                       onu->onu_owner, NULL);
1210         else
1211                 rc2 = 0;
1212
1213         return rc1 ? rc1 : rc2;
1214 }
1215
1216 static inline int obd_quotactl(struct obd_export *exp,
1217                                struct obd_quotactl *oqctl)
1218 {
1219         int rc;
1220         ENTRY;
1221
1222         EXP_CHECK_DT_OP(exp, quotactl);
1223         EXP_COUNTER_INCREMENT(exp, quotactl);
1224
1225         rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
1226         RETURN(rc);
1227 }
1228
1229 static inline int obd_health_check(const struct lu_env *env,
1230                                    struct obd_device *obd)
1231 {
1232         /* returns: 0 on healthy
1233          *         >0 on unhealthy + reason code/flag
1234          *            however the only suppored reason == 1 right now
1235          *            We'll need to define some better reasons
1236          *            or flags in the future.
1237          *         <0 on error
1238          */
1239         int rc;
1240         ENTRY;
1241
1242         /* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
1243         if (obd == NULL || !OBT(obd)) {
1244                 CERROR("cleaned up obd\n");
1245                 RETURN(-EOPNOTSUPP);
1246         }
1247         if (!obd->obd_set_up || obd->obd_stopping)
1248                 RETURN(0);
1249         if (!OBP(obd, health_check))
1250                 RETURN(0);
1251
1252         rc = OBP(obd, health_check)(env, obd);
1253         RETURN(rc);
1254 }
1255
1256 static inline int obd_register_observer(struct obd_device *obd,
1257                                         struct obd_device *observer)
1258 {
1259         ENTRY;
1260         OBD_CHECK_DEV(obd);
1261         down_write(&obd->obd_observer_link_sem);
1262         if (obd->obd_observer && observer) {
1263                 up_write(&obd->obd_observer_link_sem);
1264                 RETURN(-EALREADY);
1265         }
1266         obd->obd_observer = observer;
1267         up_write(&obd->obd_observer_link_sem);
1268         RETURN(0);
1269 }
1270
1271 /* metadata helpers */
1272 static inline int md_get_root(struct obd_export *exp, const char *fileset,
1273                               struct lu_fid *fid)
1274 {
1275         int rc;
1276
1277         ENTRY;
1278         EXP_CHECK_MD_OP(exp, get_root);
1279         EXP_MD_COUNTER_INCREMENT(exp, get_root);
1280         rc = MDP(exp->exp_obd, get_root)(exp, fileset, fid);
1281
1282         RETURN(rc);
1283 }
1284
1285 static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
1286                              struct ptlrpc_request **request)
1287 {
1288         int rc;
1289         ENTRY;
1290         EXP_CHECK_MD_OP(exp, getattr);
1291         EXP_MD_COUNTER_INCREMENT(exp, getattr);
1292         rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
1293         RETURN(rc);
1294 }
1295
1296 static inline int md_null_inode(struct obd_export *exp,
1297                                    const struct lu_fid *fid)
1298 {
1299         int rc;
1300         ENTRY;
1301         EXP_CHECK_MD_OP(exp, null_inode);
1302         EXP_MD_COUNTER_INCREMENT(exp, null_inode);
1303         rc = MDP(exp->exp_obd, null_inode)(exp, fid);
1304         RETURN(rc);
1305 }
1306
1307 static inline int md_close(struct obd_export *exp, struct md_op_data *op_data,
1308                            struct md_open_data *mod,
1309                            struct ptlrpc_request **request)
1310 {
1311         int rc;
1312         ENTRY;
1313         EXP_CHECK_MD_OP(exp, close);
1314         EXP_MD_COUNTER_INCREMENT(exp, close);
1315         rc = MDP(exp->exp_obd, close)(exp, op_data, mod, request);
1316         RETURN(rc);
1317 }
1318
1319 static inline int md_create(struct obd_export *exp, struct md_op_data *op_data,
1320                             const void *data, size_t datalen, umode_t mode,
1321                             uid_t uid, gid_t gid, cfs_cap_t cap_effective,
1322                             __u64 rdev, struct ptlrpc_request **request)
1323 {
1324         int rc;
1325         ENTRY;
1326         EXP_CHECK_MD_OP(exp, create);
1327         EXP_MD_COUNTER_INCREMENT(exp, create);
1328         rc = MDP(exp->exp_obd, create)(exp, op_data, data, datalen, mode,
1329                                        uid, gid, cap_effective, rdev, request);
1330         RETURN(rc);
1331 }
1332
1333 static inline int md_enqueue(struct obd_export *exp,
1334                              struct ldlm_enqueue_info *einfo,
1335                              const union ldlm_policy_data *policy,
1336                              struct lookup_intent *it,
1337                              struct md_op_data *op_data,
1338                              struct lustre_handle *lockh,
1339                              __u64 extra_lock_flags)
1340 {
1341         int rc;
1342         ENTRY;
1343         EXP_CHECK_MD_OP(exp, enqueue);
1344         EXP_MD_COUNTER_INCREMENT(exp, enqueue);
1345         rc = MDP(exp->exp_obd, enqueue)(exp, einfo, policy, it, op_data, lockh,
1346                                         extra_lock_flags);
1347         RETURN(rc);
1348 }
1349
1350 static inline int md_getattr_name(struct obd_export *exp,
1351                                   struct md_op_data *op_data,
1352                                   struct ptlrpc_request **request)
1353 {
1354         int rc;
1355         ENTRY;
1356         EXP_CHECK_MD_OP(exp, getattr_name);
1357         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
1358         rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
1359         RETURN(rc);
1360 }
1361
1362 static inline int md_intent_lock(struct obd_export *exp,
1363                                  struct md_op_data *op_data,
1364                                  struct lookup_intent *it,
1365                                  struct ptlrpc_request **reqp,
1366                                  ldlm_blocking_callback cb_blocking,
1367                                  __u64 extra_lock_flags)
1368 {
1369         int rc;
1370         ENTRY;
1371         EXP_CHECK_MD_OP(exp, intent_lock);
1372         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
1373         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, it, reqp, cb_blocking,
1374                                             extra_lock_flags);
1375         RETURN(rc);
1376 }
1377
1378 static inline int md_link(struct obd_export *exp, struct md_op_data *op_data,
1379                           struct ptlrpc_request **request)
1380 {
1381         int rc;
1382         ENTRY;
1383         EXP_CHECK_MD_OP(exp, link);
1384         EXP_MD_COUNTER_INCREMENT(exp, link);
1385         rc = MDP(exp->exp_obd, link)(exp, op_data, request);
1386         RETURN(rc);
1387 }
1388
1389 static inline int md_rename(struct obd_export *exp, struct md_op_data *op_data,
1390                             const char *old, size_t oldlen, const char *new,
1391                             size_t newlen, struct ptlrpc_request **request)
1392 {
1393         int rc;
1394         ENTRY;
1395         EXP_CHECK_MD_OP(exp, rename);
1396         EXP_MD_COUNTER_INCREMENT(exp, rename);
1397         rc = MDP(exp->exp_obd, rename)(exp, op_data, old, oldlen, new,
1398                                        newlen, request);
1399         RETURN(rc);
1400 }
1401
1402 static inline int md_setattr(struct obd_export *exp, struct md_op_data *op_data,
1403                              void *ea, size_t ealen,
1404                              struct ptlrpc_request **request)
1405 {
1406         int rc;
1407         ENTRY;
1408         EXP_CHECK_MD_OP(exp, setattr);
1409         EXP_MD_COUNTER_INCREMENT(exp, setattr);
1410         rc = MDP(exp->exp_obd, setattr)(exp, op_data, ea, ealen, request);
1411         RETURN(rc);
1412 }
1413
1414 static inline int md_fsync(struct obd_export *exp, const struct lu_fid *fid,
1415                            struct ptlrpc_request **request)
1416 {
1417         int rc;
1418
1419         ENTRY;
1420         EXP_CHECK_MD_OP(exp, fsync);
1421         EXP_MD_COUNTER_INCREMENT(exp, fsync);
1422         rc = MDP(exp->exp_obd, fsync)(exp, fid, request);
1423
1424         RETURN(rc);
1425 }
1426
1427 static inline int md_read_page(struct obd_export *exp,
1428                                struct md_op_data *op_data,
1429                                struct md_callback *cb_op,
1430                                __u64  hash_offset,
1431                                struct page **ppage)
1432 {
1433         int rc;
1434         ENTRY;
1435         EXP_CHECK_MD_OP(exp, read_page);
1436         EXP_MD_COUNTER_INCREMENT(exp, read_page);
1437         rc = MDP(exp->exp_obd, read_page)(exp, op_data, cb_op, hash_offset,
1438                                           ppage);
1439         RETURN(rc);
1440 }
1441
1442 static inline int md_unlink(struct obd_export *exp, struct md_op_data *op_data,
1443                             struct ptlrpc_request **request)
1444 {
1445         int rc;
1446         ENTRY;
1447         EXP_CHECK_MD_OP(exp, unlink);
1448         EXP_MD_COUNTER_INCREMENT(exp, unlink);
1449         rc = MDP(exp->exp_obd, unlink)(exp, op_data, request);
1450         RETURN(rc);
1451 }
1452
1453 static inline int md_get_lustre_md(struct obd_export *exp,
1454                                    struct ptlrpc_request *req,
1455                                    struct obd_export *dt_exp,
1456                                    struct obd_export *md_exp,
1457                                    struct lustre_md *md)
1458 {
1459         ENTRY;
1460         EXP_CHECK_MD_OP(exp, get_lustre_md);
1461         EXP_MD_COUNTER_INCREMENT(exp, get_lustre_md);
1462         RETURN(MDP(exp->exp_obd, get_lustre_md)(exp, req, dt_exp, md_exp, md));
1463 }
1464
1465 static inline int md_free_lustre_md(struct obd_export *exp,
1466                                     struct lustre_md *md)
1467 {
1468         ENTRY;
1469         EXP_CHECK_MD_OP(exp, free_lustre_md);
1470         EXP_MD_COUNTER_INCREMENT(exp, free_lustre_md);
1471         RETURN(MDP(exp->exp_obd, free_lustre_md)(exp, md));
1472 }
1473
1474 static inline int md_merge_attr(struct obd_export *exp,
1475                                 const struct lmv_stripe_md *lsm,
1476                                 struct cl_attr *attr,
1477                                 ldlm_blocking_callback cb)
1478 {
1479         ENTRY;
1480         EXP_CHECK_MD_OP(exp, merge_attr);
1481         EXP_MD_COUNTER_INCREMENT(exp, merge_attr);
1482         RETURN(MDP(exp->exp_obd, merge_attr)(exp, lsm, attr, cb));
1483 }
1484
1485 static inline int md_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1486                               u64 valid, const char *name,
1487                               const char *input, int input_size,
1488                               int output_size, int flags, __u32 suppgid,
1489                               struct ptlrpc_request **request)
1490 {
1491         ENTRY;
1492         EXP_CHECK_MD_OP(exp, setxattr);
1493         EXP_MD_COUNTER_INCREMENT(exp, setxattr);
1494         RETURN(MDP(exp->exp_obd, setxattr)(exp, fid, valid, name, input,
1495                                            input_size, output_size, flags,
1496                                            suppgid, request));
1497 }
1498
1499 static inline int md_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1500                               u64 valid, const char *name,
1501                               const char *input, int input_size,
1502                               int output_size, int flags,
1503                               struct ptlrpc_request **request)
1504 {
1505         ENTRY;
1506         EXP_CHECK_MD_OP(exp, getxattr);
1507         EXP_MD_COUNTER_INCREMENT(exp, getxattr);
1508         RETURN(MDP(exp->exp_obd, getxattr)(exp, fid, valid, name, input,
1509                                            input_size, output_size, flags,
1510                                            request));
1511 }
1512
1513 static inline int md_set_open_replay_data(struct obd_export *exp,
1514                                           struct obd_client_handle *och,
1515                                           struct lookup_intent *it)
1516 {
1517         ENTRY;
1518         EXP_CHECK_MD_OP(exp, set_open_replay_data);
1519         EXP_MD_COUNTER_INCREMENT(exp, set_open_replay_data);
1520         RETURN(MDP(exp->exp_obd, set_open_replay_data)(exp, och, it));
1521 }
1522
1523 static inline int md_clear_open_replay_data(struct obd_export *exp,
1524                                             struct obd_client_handle *och)
1525 {
1526         ENTRY;
1527         EXP_CHECK_MD_OP(exp, clear_open_replay_data);
1528         EXP_MD_COUNTER_INCREMENT(exp, clear_open_replay_data);
1529         RETURN(MDP(exp->exp_obd, clear_open_replay_data)(exp, och));
1530 }
1531
1532 static inline int md_set_lock_data(struct obd_export *exp,
1533                                    __u64 *lockh, void *data, __u64 *bits)
1534 {
1535         ENTRY;
1536         EXP_CHECK_MD_OP(exp, set_lock_data);
1537         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
1538         RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
1539 }
1540
1541 static inline
1542 int md_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
1543                      union ldlm_policy_data *policy, enum ldlm_mode mode,
1544                      enum ldlm_cancel_flags cancel_flags, void *opaque)
1545 {
1546         int rc;
1547         ENTRY;
1548
1549         EXP_CHECK_MD_OP(exp, cancel_unused);
1550         EXP_MD_COUNTER_INCREMENT(exp, cancel_unused);
1551
1552         rc = MDP(exp->exp_obd, cancel_unused)(exp, fid, policy, mode,
1553                                               cancel_flags, opaque);
1554         RETURN(rc);
1555 }
1556
1557 static inline enum ldlm_mode md_lock_match(struct obd_export *exp, __u64 flags,
1558                                            const struct lu_fid *fid,
1559                                            enum ldlm_type type,
1560                                            union ldlm_policy_data *policy,
1561                                            enum ldlm_mode mode,
1562                                            struct lustre_handle *lockh)
1563 {
1564         ENTRY;
1565         EXP_CHECK_MD_OP(exp, lock_match);
1566         EXP_MD_COUNTER_INCREMENT(exp, lock_match);
1567         RETURN(MDP(exp->exp_obd, lock_match)(exp, flags, fid, type,
1568                                              policy, mode, lockh));
1569 }
1570
1571 static inline int md_init_ea_size(struct obd_export *exp, __u32 ea_size,
1572                                   __u32 def_ea_size)
1573 {
1574         ENTRY;
1575         EXP_CHECK_MD_OP(exp, init_ea_size);
1576         EXP_MD_COUNTER_INCREMENT(exp, init_ea_size);
1577         RETURN(MDP(exp->exp_obd, init_ea_size)(exp, ea_size, def_ea_size));
1578 }
1579
1580 static inline int md_intent_getattr_async(struct obd_export *exp,
1581                                           struct md_enqueue_info *minfo)
1582 {
1583         int rc;
1584         ENTRY;
1585         EXP_CHECK_MD_OP(exp, intent_getattr_async);
1586         EXP_MD_COUNTER_INCREMENT(exp, intent_getattr_async);
1587         rc = MDP(exp->exp_obd, intent_getattr_async)(exp, minfo);
1588         RETURN(rc);
1589 }
1590
1591 static inline int md_revalidate_lock(struct obd_export *exp,
1592                                      struct lookup_intent *it,
1593                                      struct lu_fid *fid, __u64 *bits)
1594 {
1595         int rc;
1596         ENTRY;
1597         EXP_CHECK_MD_OP(exp, revalidate_lock);
1598         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
1599         rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
1600         RETURN(rc);
1601 }
1602
1603 static inline int md_get_fid_from_lsm(struct obd_export *exp,
1604                                       const struct lmv_stripe_md *lsm,
1605                                       const char *name, int namelen,
1606                                       struct lu_fid *fid)
1607 {
1608         int rc;
1609         ENTRY;
1610         EXP_CHECK_MD_OP(exp, get_fid_from_lsm);
1611         EXP_MD_COUNTER_INCREMENT(exp, get_fid_from_lsm);
1612         rc = MDP(exp->exp_obd, get_fid_from_lsm)(exp, lsm, name, namelen, fid);
1613         RETURN(rc);
1614 }
1615
1616
1617 /* Unpack an MD struct from disk to in-memory format.
1618  * Returns +ve size of unpacked MD (0 for free), or -ve error.
1619  *
1620  * If *plsm != NULL and lmm == NULL then *lsm will be freed.
1621  * If *plsm == NULL then it will be allocated.
1622  */
1623 static inline int md_unpackmd(struct obd_export *exp,
1624                               struct lmv_stripe_md **plsm,
1625                               const union lmv_mds_md *lmm, size_t lmm_size)
1626 {
1627         int rc;
1628         ENTRY;
1629         EXP_CHECK_MD_OP(exp, unpackmd);
1630         EXP_MD_COUNTER_INCREMENT(exp, unpackmd);
1631         rc = MDP(exp->exp_obd, unpackmd)(exp, plsm, lmm, lmm_size);
1632         RETURN(rc);
1633 }
1634
1635 /* OBD Metadata Support */
1636
1637 extern int obd_init_caches(void);
1638 extern void obd_cleanup_caches(void);
1639
1640 /* support routines */
1641 extern struct kmem_cache *obdo_cachep;
1642
1643 #define OBDO_ALLOC(ptr)                                                       \
1644 do {                                                                          \
1645         OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, GFP_NOFS);             \
1646 } while(0)
1647
1648 #define OBDO_FREE(ptr)                                                        \
1649 do {                                                                          \
1650         OBD_SLAB_FREE_PTR((ptr), obdo_cachep);                                \
1651 } while(0)
1652
1653
1654 typedef int (*register_lwp_cb)(void *data);
1655
1656 struct lwp_register_item {
1657         struct obd_export **lri_exp;
1658         register_lwp_cb     lri_cb_func;
1659         void               *lri_cb_data;
1660         struct list_head    lri_list;
1661         atomic_t            lri_ref;
1662         char                lri_name[MTI_NAME_MAXLEN];
1663 };
1664
1665 /* I'm as embarrassed about this as you are.
1666  *
1667  * <shaver> // XXX do not look into _superhack with remaining eye
1668  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
1669 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
1670
1671 /* obd_mount.c */
1672 #ifdef HAVE_SERVER_SUPPORT
1673 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
1674                              register_lwp_cb cb_func, void *cb_data);
1675 void lustre_deregister_lwp_item(struct obd_export **exp);
1676 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx);
1677 void lustre_notify_lwp_list(struct obd_export *exp);
1678 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx);
1679 #endif /* HAVE_SERVER_SUPPORT */
1680 int lustre_register_fs(void);
1681 int lustre_unregister_fs(void);
1682 int lustre_check_exclusion(struct super_block *sb, char *svname);
1683
1684 /* sysctl.c */
1685 extern void obd_sysctl_init (void);
1686 extern void obd_sysctl_clean (void);
1687
1688 /* uuid.c  */
1689 typedef __u8 class_uuid_t[16];
1690 void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
1691
1692 /* lustre_peer.c    */
1693 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
1694 int class_add_uuid(const char *uuid, __u64 nid);
1695 int class_del_uuid (const char *uuid);
1696 int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
1697 void class_init_uuidlist(void);
1698 void class_exit_uuidlist(void);
1699
1700 /* class_obd.c */
1701 extern char obd_jobid_node[];
1702
1703 /* prng.c */
1704 #define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
1705
1706 /* statfs_pack.c */
1707 struct kstatfs;
1708 void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
1709 void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);
1710
1711 /* root squash info */
1712 struct rw_semaphore;
1713 struct root_squash_info {
1714         uid_t                   rsi_uid;
1715         gid_t                   rsi_gid;
1716         struct list_head        rsi_nosquash_nids;
1717         struct rw_semaphore     rsi_sem;
1718 };
1719
1720 int server_name2index(const char *svname, __u32 *idx, const char **endptr);
1721
1722 /* linux-module.c */
1723 extern struct miscdevice obd_psdev;
1724 int class_procfs_init(void);
1725 int class_procfs_clean(void);
1726
1727 #endif /* __LINUX_OBD_CLASS_H */