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LU-1330 obdclass: add obd_target.h
[fs/lustre-release.git] / lustre / include / obd_class.h
index 8a73f27..029b21e 100644 (file)
@@ -1,6 +1,4 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  * GPL HEADER END
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2013, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
 #error Unsupported operating system.
 #endif
 
+#define OBD_STATFS_NODELAY      0x0001  /* requests should be send without delay
+                                         * and resends for avoid deadlocks */
+#define OBD_STATFS_FROM_CACHE   0x0002  /* the statfs callback should not update
+                                         * obd_osfs_age */
+#define OBD_STATFS_PTLRPCD      0x0004  /* requests will be sent via ptlrpcd
+                                         * instead of a specific set. This
+                                         * means that we cannot rely on the set
+                                         * interpret routine to be called.
+                                         * lov_statfs_fini() must thus be called
+                                         * by the request interpret routine */
+#define OBD_STATFS_FOR_MDT0    0x0008  /* The statfs is only for retrieving
+                                        * information from MDT0. */
+#define OBD_FL_PUNCH    0x00000001      /* To indicate it is punch operation */
+
 /* OBD Device Declarations */
 extern struct obd_device *obd_devs[MAX_OBD_DEVICES];
-extern spinlock_t obd_dev_lock;
+extern rwlock_t obd_dev_lock;
 
 /* OBD Operations Declarations */
 extern struct obd_device *class_conn2obd(struct lustre_handle *);
 extern struct obd_device *class_exp2obd(struct obd_export *);
+extern int class_handle_ioctl(unsigned int cmd, unsigned long arg);
+extern int lustre_get_jobid(char *jobid);
 
 struct lu_device_type;
 
@@ -86,29 +102,37 @@ void class_obd_list(void);
 struct obd_device * class_find_client_obd(struct obd_uuid *tgt_uuid,
                                           const char * typ_name,
                                           struct obd_uuid *grp_uuid);
-struct obd_device * class_find_client_notype(struct obd_uuid *tgt_uuid,
-                                             struct obd_uuid *grp_uuid);
 struct obd_device * class_devices_in_group(struct obd_uuid *grp_uuid,
                                            int *next);
 struct obd_device * class_num2obd(int num);
+int get_devices_count(void);
 
-int oig_init(struct obd_io_group **oig);
-int oig_add_one(struct obd_io_group *oig, struct oig_callback_context *occ);
-void oig_complete_one(struct obd_io_group *oig,
-                      struct oig_callback_context *occ, int rc);
-void oig_release(struct obd_io_group *oig);
-int oig_wait(struct obd_io_group *oig);
+int class_notify_sptlrpc_conf(const char *fsname, int namelen);
 
 char *obd_export_nid2str(struct obd_export *exp);
 
 int obd_export_evict_by_nid(struct obd_device *obd, const char *nid);
 int obd_export_evict_by_uuid(struct obd_device *obd, const char *uuid);
+int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep);
 
 int obd_zombie_impexp_init(void);
 void obd_zombie_impexp_stop(void);
 void obd_zombie_impexp_cull(void);
-
+void obd_zombie_barrier(void);
+void obd_exports_barrier(struct obd_device *obd);
+int kuc_len(int payload_len);
+struct kuc_hdr * kuc_ptr(void *p);
+int kuc_ispayload(void *p);
+void *kuc_alloc(int payload_len, int transport, int type);
+void kuc_free(void *p, int payload_len);
+
+struct llog_handle;
+struct llog_rec_hdr;
+typedef int (*llog_cb_t)(const struct lu_env *, struct llog_handle *,
+                        struct llog_rec_hdr *, void *);
 /* obd_config.c */
+struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
+                                    const char *new_name);
 int class_process_config(struct lustre_cfg *lcfg);
 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
                              struct lustre_cfg *lcfg, void *data);
@@ -116,8 +140,16 @@ int class_attach(struct lustre_cfg *lcfg);
 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg);
 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg);
-struct obd_device *class_incref(struct obd_device *obd);
-void class_decref(struct obd_device *obd);
+struct obd_device *class_incref(struct obd_device *obd,
+                                const char *scope, const void *source);
+void class_decref(struct obd_device *obd,
+                  const char *scope, const void *source);
+void dump_exports(struct obd_device *obd, int locks);
+int class_config_llog_handler(const struct lu_env *env,
+                             struct llog_handle *handle,
+                             struct llog_rec_hdr *rec, void *data);
+int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg);
+int class_add_uuid(const char *uuid, __u64 nid);
 
 /*obdecho*/
 #ifdef LPROCFS
@@ -137,31 +169,45 @@ static inline void lprocfs_echo_init_vars(struct lprocfs_static_vars *lvars)
 
 /* Passed as data param to class_config_parse_llog */
 struct config_llog_instance {
-        char *              cfg_instance;
+        char               *cfg_obdname;
+        void               *cfg_instance;
         struct super_block *cfg_sb;
         struct obd_uuid     cfg_uuid;
+       llog_cb_t           cfg_callback;
         int                 cfg_last_idx; /* for partial llog processing */
         int                 cfg_flags;
 };
-int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
-                            struct config_llog_instance *cfg);
-int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
-                           struct config_llog_instance *cfg);
+int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
+                           char *name, struct config_llog_instance *cfg);
+int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
+                          char *name, struct config_llog_instance *cfg);
+
+enum {
+        CONFIG_T_CONFIG  = 0,
+        CONFIG_T_SPTLRPC = 1,
+        CONFIG_T_RECOVER = 2,
+        CONFIG_T_MAX     = 3
+};
 
 /* list of active configuration logs  */
 struct config_llog_data {
-        char               *cld_logname;
-        struct ldlm_res_id  cld_resid;
+        struct ldlm_res_id          cld_resid;
         struct config_llog_instance cld_cfg;
-        struct list_head    cld_list_chain;
-        atomic_t            cld_refcount;
-        struct obd_export  *cld_mgcexp;
-        unsigned int        cld_stopping:1, /* we were told to stop watching */
-                            cld_lostlock:1; /* lock not requeued */
+        cfs_list_t                  cld_list_chain;
+        cfs_atomic_t                cld_refcount;
+        struct config_llog_data    *cld_sptlrpc;/* depended sptlrpc log */
+        struct config_llog_data    *cld_recover;    /* imperative recover log */
+        struct obd_export          *cld_mgcexp;
+       struct mutex                cld_lock;
+        int                         cld_type;
+        unsigned int                cld_stopping:1, /* we were told to stop
+                                                     * watching */
+                                    cld_lostlock:1; /* lock not requeued */
+        char                        cld_logname[0];
 };
 
 struct lustre_profile {
-        struct list_head lp_list;
+        cfs_list_t       lp_list;
         char            *lp_profile;
         char            *lp_dt;
         char            *lp_md;
@@ -171,43 +217,73 @@ struct lustre_profile *class_get_profile(const char * prof);
 void class_del_profile(const char *prof);
 void class_del_profiles(void);
 
-#define class_export_rpc_get(exp)                                       \
+#if LUSTRE_TRACKS_LOCK_EXP_REFS
+
+void __class_export_add_lock_ref(struct obd_export *, struct ldlm_lock *);
+void __class_export_del_lock_ref(struct obd_export *, struct ldlm_lock *);
+extern void (*class_export_dump_hook)(struct obd_export *);
+
+#else
+
+#define __class_export_add_lock_ref(exp, lock)             do {} while(0)
+#define __class_export_del_lock_ref(exp, lock)             do {} while(0)
+
+#endif
+
+#define class_export_rpc_inc(exp)                                       \
 ({                                                                      \
-        atomic_inc(&(exp)->exp_rpc_count);                              \
+        cfs_atomic_inc(&(exp)->exp_rpc_count);                          \
         CDEBUG(D_INFO, "RPC GETting export %p : new rpc_count %d\n",    \
-               (exp), atomic_read(&(exp)->exp_rpc_count));              \
-        class_export_get(exp);                                          \
+               (exp), cfs_atomic_read(&(exp)->exp_rpc_count));          \
 })
 
-#define class_export_rpc_put(exp)                                       \
+#define class_export_rpc_dec(exp)                                       \
 ({                                                                      \
-        atomic_dec(&(exp)->exp_rpc_count);                              \
+        LASSERT_ATOMIC_POS(&exp->exp_rpc_count);                        \
+        cfs_atomic_dec(&(exp)->exp_rpc_count);                          \
         CDEBUG(D_INFO, "RPC PUTting export %p : new rpc_count %d\n",    \
-               (exp), atomic_read(&(exp)->exp_rpc_count));              \
+               (exp), cfs_atomic_read(&(exp)->exp_rpc_count));          \
+})
+
+#define class_export_lock_get(exp, lock)                                \
+({                                                                      \
+        cfs_atomic_inc(&(exp)->exp_locks_count);                        \
+        __class_export_add_lock_ref(exp, lock);                         \
+        CDEBUG(D_INFO, "lock GETting export %p : new locks_count %d\n", \
+               (exp), cfs_atomic_read(&(exp)->exp_locks_count));        \
+        class_export_get(exp);                                          \
+})
+
+#define class_export_lock_put(exp, lock)                                \
+({                                                                      \
+        LASSERT_ATOMIC_POS(&exp->exp_locks_count);                      \
+        cfs_atomic_dec(&(exp)->exp_locks_count);                        \
+        __class_export_del_lock_ref(exp, lock);                         \
+        CDEBUG(D_INFO, "lock PUTting export %p : new locks_count %d\n", \
+               (exp), cfs_atomic_read(&(exp)->exp_locks_count));        \
         class_export_put(exp);                                          \
 })
 
-/* genops.c */
-#define class_export_get(exp)                                                  \
-({                                                                             \
-        struct obd_export *exp_ = exp;                                         \
-        atomic_inc(&exp_->exp_refcount);                                       \
-        CDEBUG(D_INFO, "GETting export %p : new refcount %d\n", exp_,          \
-               atomic_read(&exp_->exp_refcount));                              \
-        exp_;                                                                  \
+#define class_export_cb_get(exp)                                        \
+({                                                                      \
+        cfs_atomic_inc(&(exp)->exp_cb_count);                           \
+        CDEBUG(D_INFO, "callback GETting export %p : new cb_count %d\n",\
+               (exp), cfs_atomic_read(&(exp)->exp_cb_count));           \
+        class_export_get(exp);                                          \
 })
 
-#define class_export_put(exp)                                                  \
-do {                                                                           \
-        LASSERT((exp) != NULL);                                                \
-        CDEBUG(D_INFO, "PUTting export %p : new refcount %d\n", (exp),         \
-               atomic_read(&(exp)->exp_refcount) - 1);                         \
-        LASSERT(atomic_read(&(exp)->exp_refcount) > 0);                        \
-        LASSERT(atomic_read(&(exp)->exp_refcount) < 0x5a5a5a);                 \
-        __class_export_put(exp);                                               \
-} while (0)
+#define class_export_cb_put(exp)                                        \
+({                                                                      \
+        LASSERT_ATOMIC_POS(&exp->exp_cb_count);                         \
+        cfs_atomic_dec(&(exp)->exp_cb_count);                           \
+        CDEBUG(D_INFO, "callback PUTting export %p : new cb_count %d\n",\
+               (exp), cfs_atomic_read(&(exp)->exp_cb_count));           \
+        class_export_put(exp);                                          \
+})
 
-void __class_export_put(struct obd_export *);
+/* genops.c */
+struct obd_export *class_export_get(struct obd_export *exp);
+void class_export_put(struct obd_export *exp);
 struct obd_export *class_new_export(struct obd_device *obddev,
                                     struct obd_uuid *cluuid);
 void class_unlink_export(struct obd_export *exp);
@@ -224,10 +300,32 @@ int class_connect(struct lustre_handle *conn, struct obd_device *obd,
                   struct obd_uuid *cluuid);
 int class_disconnect(struct obd_export *exp);
 void class_fail_export(struct obd_export *exp);
+int class_connected_export(struct obd_export *exp);
 void class_disconnect_exports(struct obd_device *obddev);
-int class_disconnect_stale_exports(struct obd_device *,
-                                    int (*test_export)(struct obd_export *));
 int class_manual_cleanup(struct obd_device *obd);
+void class_disconnect_stale_exports(struct obd_device *,
+                                    int (*test_export)(struct obd_export *));
+static inline enum obd_option exp_flags_from_obd(struct obd_device *obd)
+{
+        return ((obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
+                (obd->obd_force ? OBD_OPT_FORCE : 0) |
+                (obd->obd_abort_recovery ? OBD_OPT_ABORT_RECOV : 0) |
+                0);
+}
+
+#ifdef HAVE_SERVER_SUPPORT
+static inline struct lu_target *class_exp2tgt(struct obd_export *exp)
+{
+        LASSERT(exp->exp_obd);
+        return exp->exp_obd->u.obt.obt_lut;
+}
+
+static inline struct lr_server_data *class_server_data(struct obd_device *obd)
+{
+        LASSERT(obd->u.obt.obt_lut);
+        return &obd->u.obt.obt_lut->lut_lsd;
+}
+#endif
 
 void obdo_cpy_md(struct obdo *dst, struct obdo *src, obd_flag valid);
 void obdo_to_ioobj(struct obdo *oa, struct obd_ioobj *ioobj);
@@ -238,6 +336,9 @@ void md_from_obdo(struct md_op_data *op_data, struct obdo *oa, obd_flag valid);
 void obdo_from_md(struct obdo *oa, struct md_op_data *op_data,
                   unsigned int valid);
 
+void obdo_cpu_to_le(struct obdo *dobdo, struct obdo *sobdo);
+void obdo_le_to_cpu(struct obdo *dobdo, struct obdo *sobdo);
+
 #define OBT(dev)        (dev)->obd_type
 #define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->o_ ## op
 #define MDP(dev, op)    (dev)->obd_type->typ_md_ops->m_ ## op
@@ -327,6 +428,20 @@ do {                                                            \
 #define EXP_MD_COUNTER_INCREMENT(exp, op)
 #endif
 
+static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat* tmp)
+{
+        /* Always add in ldlm_stats */
+        tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC
+                                                  ,LPROCFS_STATS_FLAG_NOPERCPU);
+        if (tmp->nid_ldlm_stats == NULL)
+                return -ENOMEM;
+
+        lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
+
+        return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
+                                      tmp->nid_ldlm_stats);
+}
+
 #define OBD_CHECK_MD_OP(obd, op, err)                           \
 do {                                                            \
         if (!OBT(obd) || !MDP((obd), op)) {                     \
@@ -398,7 +513,8 @@ static inline int class_devno_max(void)
         return MAX_OBD_DEVICES;
 }
 
-static inline int obd_get_info(struct obd_export *exp, __u32 keylen,
+static inline int obd_get_info(const struct lu_env *env,
+                               struct obd_export *exp, __u32 keylen,
                                void *key, __u32 *vallen, void *val,
                                struct lov_stripe_md *lsm)
 {
@@ -408,11 +524,13 @@ static inline int obd_get_info(struct obd_export *exp, __u32 keylen,
         EXP_CHECK_DT_OP(exp, get_info);
         EXP_COUNTER_INCREMENT(exp, get_info);
 
-        rc = OBP(exp->exp_obd, get_info)(exp, keylen, key, vallen, val, lsm);
+        rc = OBP(exp->exp_obd, get_info)(env, exp, keylen, key, vallen, val,
+                                         lsm);
         RETURN(rc);
 }
 
-static inline int obd_set_info_async(struct obd_export *exp, obd_count keylen,
+static inline int obd_set_info_async(const struct lu_env *env,
+                                     struct obd_export *exp, obd_count keylen,
                                      void *key, obd_count vallen, void *val,
                                      struct ptlrpc_request_set *set)
 {
@@ -422,32 +540,50 @@ static inline int obd_set_info_async(struct obd_export *exp, obd_count keylen,
         EXP_CHECK_DT_OP(exp, set_info_async);
         EXP_COUNTER_INCREMENT(exp, set_info_async);
 
-        rc = OBP(exp->exp_obd, set_info_async)(exp, keylen, key, vallen, val,
-                                               set);
+        rc = OBP(exp->exp_obd, set_info_async)(env, exp, keylen, key, vallen,
+                                               val, set);
         RETURN(rc);
 }
 
-#ifdef __KERNEL__
+/*
+ * obd-lu integration.
+ *
+ * Functionality is being moved into new lu_device-based layering, but some
+ * pieces of configuration process are still based on obd devices.
+ *
+ * Specifically, lu_device_type_operations::ldto_device_alloc() methods fully
+ * subsume ->o_setup() methods of obd devices they replace. The same for
+ * lu_device_operations::ldo_process_config() and ->o_process_config(). As a
+ * result, obd_setup() and obd_process_config() branch and call one XOR
+ * another.
+ *
+ * Yet neither lu_device_type_operations::ldto_device_fini() nor
+ * lu_device_type_operations::ldto_device_free() fully implement the
+ * functionality of ->o_precleanup() and ->o_cleanup() they override. Hence,
+ * obd_precleanup() and obd_cleanup() call both lu_device and obd operations.
+ */
+
 #define DECLARE_LU_VARS(ldt, d)                 \
-        struct lu_device_type *ldt;             \
+        struct lu_device_type *ldt;       \
         struct lu_device *d
-#else
-#define DECLARE_LU_VARS(ldt, d)                                 \
-        extern void __placeholder_to_put_a_semicolon(void)
-#endif
+
 static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 {
         int rc;
         DECLARE_LU_VARS(ldt, d);
         ENTRY;
 
-#ifdef __KERNEL__
         ldt = obd->obd_type->typ_lu;
         if (ldt != NULL) {
+                struct lu_context  session_ctx;
                 struct lu_env env;
+                lu_context_init(&session_ctx, LCT_SESSION);
+                session_ctx.lc_thread = NULL;
+                lu_context_enter(&session_ctx);
 
-                rc = lu_env_init(&env, NULL, ldt->ldt_ctx_tags);
+                rc = lu_env_init(&env, ldt->ldt_ctx_tags);
                 if (rc == 0) {
+                        env.le_ses = &session_ctx;
                         d = ldt->ldt_ops->ldto_device_alloc(&env, ldt, cfg);
                         lu_env_fini(&env);
                         if (!IS_ERR(d)) {
@@ -457,9 +593,10 @@ static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
                         } else
                                 rc = PTR_ERR(d);
                 }
-        } else
-#endif
-        {
+                lu_context_exit(&session_ctx);
+                lu_context_fini(&session_ctx);
+
+        } else {
                 OBD_CHECK_DT_OP(obd, setup, -EOPNOTSUPP);
                 OBD_COUNTER_INCREMENT(obd, setup);
                 rc = OBP(obd, setup)(obd, cfg);
@@ -475,30 +612,23 @@ static inline int obd_precleanup(struct obd_device *obd,
         ENTRY;
 
         OBD_CHECK_DEV(obd);
-#ifdef __KERNEL__
         ldt = obd->obd_type->typ_lu;
         d = obd->obd_lu_dev;
-        if (ldt != NULL) {
-                LASSERT(d != NULL);
+        if (ldt != NULL && d != NULL) {
                 if (cleanup_stage == OBD_CLEANUP_EXPORTS) {
                         struct lu_env env;
 
-                        rc = lu_env_init(&env, NULL, ldt->ldt_ctx_tags);
+                        rc = lu_env_init(&env, ldt->ldt_ctx_tags);
                         if (rc == 0) {
                                 ldt->ldt_ops->ldto_device_fini(&env, d);
                                 lu_env_fini(&env);
                         }
-                } else {
-                        rc = 0;
                 }
-        } else
-#endif
-        {
-                OBD_CHECK_DT_OP(obd, precleanup, 0);
-                rc = OBP(obd, precleanup)(obd, cleanup_stage);
         }
-
+        OBD_CHECK_DT_OP(obd, precleanup, 0);
         OBD_COUNTER_INCREMENT(obd, precleanup);
+
+        rc = OBP(obd, precleanup)(obd, cleanup_stage);
         RETURN(rc);
 }
 
@@ -510,29 +640,50 @@ static inline int obd_cleanup(struct obd_device *obd)
 
         OBD_CHECK_DEV(obd);
 
-#ifdef __KERNEL__
         ldt = obd->obd_type->typ_lu;
         d = obd->obd_lu_dev;
-        if (ldt != NULL) {
+        if (ldt != NULL && d != NULL) {
                 struct lu_env env;
-                LASSERT(d != NULL);
 
-                rc = lu_env_init(&env, NULL, ldt->ldt_ctx_tags);
+                rc = lu_env_init(&env, ldt->ldt_ctx_tags);
                 if (rc == 0) {
                         ldt->ldt_ops->ldto_device_free(&env, d);
                         lu_env_fini(&env);
                         obd->obd_lu_dev = NULL;
                 }
-        } else
-#endif
-        {
-                OBD_CHECK_DT_OP(obd, cleanup, 0);
-                rc = OBP(obd, cleanup)(obd);
         }
+        OBD_CHECK_DT_OP(obd, cleanup, 0);
         OBD_COUNTER_INCREMENT(obd, cleanup);
+
+        rc = OBP(obd, cleanup)(obd);
         RETURN(rc);
 }
 
+static inline void obd_cleanup_client_import(struct obd_device *obd)
+{
+        ENTRY;
+
+        /* If we set up but never connected, the
+           client import will not have been cleaned. */
+       down_write(&obd->u.cli.cl_sem);
+        if (obd->u.cli.cl_import) {
+                struct obd_import *imp;
+                imp = obd->u.cli.cl_import;
+                CDEBUG(D_CONFIG, "%s: client import never connected\n",
+                       obd->obd_name);
+                ptlrpc_invalidate_import(imp);
+                if (imp->imp_rq_pool) {
+                        ptlrpc_free_rq_pool(imp->imp_rq_pool);
+                        imp->imp_rq_pool = NULL;
+                }
+                client_destroy_import(imp);
+                obd->u.cli.cl_import = NULL;
+        }
+       up_write(&obd->u.cli.cl_sem);
+
+        EXIT;
+}
+
 static inline int
 obd_process_config(struct obd_device *obd, int datalen, void *data)
 {
@@ -542,24 +693,23 @@ obd_process_config(struct obd_device *obd, int datalen, void *data)
 
         OBD_CHECK_DEV(obd);
 
-#ifdef __KERNEL__
+        obd->obd_process_conf = 1;
         ldt = obd->obd_type->typ_lu;
         d = obd->obd_lu_dev;
         if (ldt != NULL && d != NULL) {
                 struct lu_env env;
 
-                rc = lu_env_init(&env, NULL, ldt->ldt_ctx_tags);
+                rc = lu_env_init(&env, ldt->ldt_ctx_tags);
                 if (rc == 0) {
                         rc = d->ld_ops->ldo_process_config(&env, d, data);
                         lu_env_fini(&env);
                 }
-        } else
-#endif
-        {
+        } else {
                 OBD_CHECK_DT_OP(obd, process_config, -EOPNOTSUPP);
                 rc = OBP(obd, process_config)(obd, datalen, data);
         }
         OBD_COUNTER_INCREMENT(obd, process_config);
+        obd->obd_process_conf = 0;
 
         RETURN(rc);
 }
@@ -601,11 +751,21 @@ static inline int obd_alloc_diskmd(struct obd_export *exp,
 }
 
 static inline int obd_free_diskmd(struct obd_export *exp,
-                                  struct lov_mds_md **disk_tgt)
-{
-        LASSERT(disk_tgt);
-        LASSERT(*disk_tgt);
-        return obd_packmd(exp, disk_tgt, NULL);
+                                 struct lov_mds_md **disk_tgt)
+{
+       LASSERT(disk_tgt);
+       LASSERT(*disk_tgt);
+       /*
+        * LU-2590, for caller's convenience, *disk_tgt could be host
+        * endianness, it needs swab to LE if necessary, while just
+        * lov_mds_md header needs it for figuring out how much memory
+        * needs to be freed.
+        */
+       if ((cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) &&
+           (((*disk_tgt)->lmm_magic == LOV_MAGIC_V1) ||
+            ((*disk_tgt)->lmm_magic == LOV_MAGIC_V3)))
+               lustre_swab_lov_mds_md(*disk_tgt);
+       return obd_packmd(exp, disk_tgt, NULL);
 }
 
 /* Unpack an MD struct from disk to in-memory format.
@@ -642,39 +802,44 @@ static inline int obd_alloc_memmd(struct obd_export *exp,
 static inline int obd_free_memmd(struct obd_export *exp,
                                  struct lov_stripe_md **mem_tgt)
 {
+        int rc;
+
         LASSERT(mem_tgt);
         LASSERT(*mem_tgt);
-        return obd_unpackmd(exp, mem_tgt, NULL, 0);
+        rc = obd_unpackmd(exp, mem_tgt, NULL, 0);
+        *mem_tgt = NULL;
+        return rc;
 }
 
-static inline int obd_checkmd(struct obd_export *exp,
-                              struct obd_export *md_exp,
-                              struct lov_stripe_md *mem_tgt)
+static inline int obd_precreate(struct obd_export *exp)
 {
         int rc;
         ENTRY;
 
-        EXP_CHECK_DT_OP(exp, checkmd);
-        EXP_COUNTER_INCREMENT(exp, checkmd);
+        EXP_CHECK_DT_OP(exp, precreate);
+        OBD_COUNTER_INCREMENT(exp->exp_obd, precreate);
 
-        rc = OBP(exp->exp_obd, checkmd)(exp, md_exp, mem_tgt);
+        rc = OBP(exp->exp_obd, precreate)(exp);
         RETURN(rc);
 }
 
-static inline int obd_precreate(struct obd_export *exp)
+static inline int obd_create_async(struct obd_export *exp,
+                                   struct obd_info *oinfo,
+                                   struct lov_stripe_md **ea,
+                                   struct obd_trans_info *oti)
 {
         int rc;
         ENTRY;
 
-        EXP_CHECK_DT_OP(exp, precreate);
-        OBD_COUNTER_INCREMENT(exp->exp_obd, precreate);
+        EXP_CHECK_DT_OP(exp, create_async);
+        EXP_COUNTER_INCREMENT(exp, create_async);
 
-        rc = OBP(exp->exp_obd, precreate)(exp);
+        rc = OBP(exp->exp_obd, create_async)(exp, oinfo, ea, oti);
         RETURN(rc);
 }
 
-static inline int obd_create(struct obd_export *exp, struct obdo *obdo,
-                             struct lov_stripe_md **ea,
+static inline int obd_create(const struct lu_env *env, struct obd_export *exp,
+                             struct obdo *obdo, struct lov_stripe_md **ea,
                              struct obd_trans_info *oti)
 {
         int rc;
@@ -683,14 +848,14 @@ static inline int obd_create(struct obd_export *exp, struct obdo *obdo,
         EXP_CHECK_DT_OP(exp, create);
         EXP_COUNTER_INCREMENT(exp, create);
 
-        rc = OBP(exp->exp_obd, create)(exp, obdo, ea, oti);
+        rc = OBP(exp->exp_obd, create)(env, exp, obdo, ea, oti);
         RETURN(rc);
 }
 
-static inline int obd_destroy(struct obd_export *exp, struct obdo *obdo,
-                              struct lov_stripe_md *ea,
+static inline int obd_destroy(const struct lu_env *env, struct obd_export *exp,
+                              struct obdo *obdo, struct lov_stripe_md *ea,
                               struct obd_trans_info *oti,
-                              struct obd_export *md_exp)
+                              struct obd_export *md_exp, void *capa)
 {
         int rc;
         ENTRY;
@@ -698,11 +863,12 @@ static inline int obd_destroy(struct obd_export *exp, struct obdo *obdo,
         EXP_CHECK_DT_OP(exp, destroy);
         EXP_COUNTER_INCREMENT(exp, destroy);
 
-        rc = OBP(exp->exp_obd, destroy)(exp, obdo, ea, oti, md_exp);
+        rc = OBP(exp->exp_obd, destroy)(env, exp, obdo, ea, oti, md_exp, capa);
         RETURN(rc);
 }
 
-static inline int obd_getattr(struct obd_export *exp, struct obd_info *oinfo)
+static inline int obd_getattr(const struct lu_env *env, struct obd_export *exp,
+                              struct obd_info *oinfo)
 {
         int rc;
         ENTRY;
@@ -710,7 +876,7 @@ static inline int obd_getattr(struct obd_export *exp, struct obd_info *oinfo)
         EXP_CHECK_DT_OP(exp, getattr);
         EXP_COUNTER_INCREMENT(exp, getattr);
 
-        rc = OBP(exp->exp_obd, getattr)(exp, oinfo);
+        rc = OBP(exp->exp_obd, getattr)(env, exp, oinfo);
         RETURN(rc);
 }
 
@@ -728,7 +894,8 @@ static inline int obd_getattr_async(struct obd_export *exp,
         RETURN(rc);
 }
 
-static inline int obd_setattr(struct obd_export *exp, struct obd_info *oinfo,
+static inline int obd_setattr(const struct lu_env *env, struct obd_export *exp,
+                              struct obd_info *oinfo,
                               struct obd_trans_info *oti)
 {
         int rc;
@@ -737,7 +904,7 @@ static inline int obd_setattr(struct obd_export *exp, struct obd_info *oinfo,
         EXP_CHECK_DT_OP(exp, setattr);
         EXP_COUNTER_INCREMENT(exp, setattr);
 
-        rc = OBP(exp->exp_obd, setattr)(exp, oinfo, oti);
+        rc = OBP(exp->exp_obd, setattr)(env, exp, oinfo, oti);
         RETURN(rc);
 }
 
@@ -822,27 +989,30 @@ static inline struct obd_uuid *obd_get_uuid(struct obd_export *exp)
         RETURN(uuid);
 }
 
+/** Create a new /a exp on device /a obd for the uuid /a cluuid
+ * @param exp New export handle
+ * @param d Connect data, supported flags are set, flags also understood
+ *    by obd are returned.
+ */
 static inline int obd_connect(const struct lu_env *env,
-                              struct lustre_handle *conn,struct obd_device *obd,
+                              struct obd_export **exp,struct obd_device *obd,
                               struct obd_uuid *cluuid,
-                              struct obd_connect_data *d,
+                              struct obd_connect_data *data,
                               void *localdata)
 {
         int rc;
-#ifdef LIBCFS_DEBUG
-        __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
+        __u64 ocf = data ? data->ocd_connect_flags : 0; /* for post-condition
                                                    * check */
-#endif
         ENTRY;
 
         OBD_CHECK_DEV_ACTIVE(obd);
         OBD_CHECK_DT_OP(obd, connect, -EOPNOTSUPP);
         OBD_COUNTER_INCREMENT(obd, connect);
 
-        rc = OBP(obd, connect)(env, conn, obd, cluuid, d, localdata);
+        rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
         /* check that only subset is granted */
-        LASSERT(ergo(d != NULL,
-                     (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
+        LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
+                                    data->ocd_connect_flags));
         RETURN(rc);
 }
 
@@ -850,13 +1020,12 @@ static inline int obd_reconnect(const struct lu_env *env,
                                 struct obd_export *exp,
                                 struct obd_device *obd,
                                 struct obd_uuid *cluuid,
-                                struct obd_connect_data *d)
+                                struct obd_connect_data *d,
+                                void *localdata)
 {
         int rc;
-#ifdef LIBCFS_DEBUG
         __u64 ocf = d ? d->ocd_connect_flags : 0; /* for post-condition
                                                    * check */
-#endif
 
         ENTRY;
 
@@ -864,7 +1033,7 @@ static inline int obd_reconnect(const struct lu_env *env,
         OBD_CHECK_DT_OP(obd, reconnect, 0);
         OBD_COUNTER_INCREMENT(obd, reconnect);
 
-        rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d);
+        rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
         /* check that only subset is granted */
         LASSERT(ergo(d != NULL,
                      (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
@@ -883,28 +1052,29 @@ static inline int obd_disconnect(struct obd_export *exp)
         RETURN(rc);
 }
 
-static inline int obd_fid_init(struct obd_export *exp)
+static inline int obd_fid_init(struct obd_device *obd, struct obd_export *exp,
+                              enum lu_cli_type type)
 {
-        int rc;
-        ENTRY;
+       int rc;
+       ENTRY;
 
-        OBD_CHECK_DT_OP(exp->exp_obd, fid_init, 0);
-        EXP_COUNTER_INCREMENT(exp, fid_init);
+       OBD_CHECK_DT_OP(obd, fid_init, 0);
+       OBD_COUNTER_INCREMENT(obd, fid_init);
 
-        rc = OBP(exp->exp_obd, fid_init)(exp);
-        RETURN(rc);
+       rc = OBP(obd, fid_init)(obd, exp, type);
+       RETURN(rc);
 }
 
-static inline int obd_fid_fini(struct obd_export *exp)
+static inline int obd_fid_fini(struct obd_device *obd)
 {
-        int rc;
-        ENTRY;
+       int rc;
+       ENTRY;
 
-        OBD_CHECK_DT_OP(exp->exp_obd, fid_fini, 0);
-        EXP_COUNTER_INCREMENT(exp, fid_fini);
+       OBD_CHECK_DT_OP(obd, fid_fini, 0);
+       OBD_COUNTER_INCREMENT(obd, fid_fini);
 
-        rc = OBP(exp->exp_obd, fid_fini)(exp);
-        RETURN(rc);
+       rc = OBP(obd, fid_fini)(obd);
+       RETURN(rc);
 }
 
 static inline int obd_fid_alloc(struct obd_export *exp,
@@ -921,31 +1091,86 @@ static inline int obd_fid_alloc(struct obd_export *exp,
         RETURN(rc);
 }
 
-static inline int obd_fid_delete(struct obd_export *exp,
-                                 const struct lu_fid *fid)
+static inline int obd_ping(const struct lu_env *env, struct obd_export *exp)
 {
         int rc;
         ENTRY;
 
-        EXP_CHECK_DT_OP(exp, fid_delete);
-        EXP_COUNTER_INCREMENT(exp, fid_delete);
+        OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
+        EXP_COUNTER_INCREMENT(exp, ping);
 
-        rc = OBP(exp->exp_obd, fid_delete)(exp, fid);
+        rc = OBP(exp->exp_obd, ping)(env, exp);
         RETURN(rc);
 }
 
-static inline int obd_ping(struct obd_export *exp)
+static inline int obd_pool_new(struct obd_device *obd, char *poolname)
 {
         int rc;
         ENTRY;
 
-        OBD_CHECK_DT_OP(exp->exp_obd, ping, 0);
-        EXP_COUNTER_INCREMENT(exp, ping);
+        OBD_CHECK_DT_OP(obd, pool_new, -EOPNOTSUPP);
+        OBD_COUNTER_INCREMENT(obd, pool_new);
 
-        rc = OBP(exp->exp_obd, ping)(exp);
+        rc = OBP(obd, pool_new)(obd, poolname);
         RETURN(rc);
 }
 
+static inline int obd_pool_del(struct obd_device *obd, char *poolname)
+{
+        int rc;
+        ENTRY;
+
+        OBD_CHECK_DT_OP(obd, pool_del, -EOPNOTSUPP);
+        OBD_COUNTER_INCREMENT(obd, pool_del);
+
+        rc = OBP(obd, pool_del)(obd, poolname);
+        RETURN(rc);
+}
+
+static inline int obd_pool_add(struct obd_device *obd, char *poolname, char *ostname)
+{
+        int rc;
+        ENTRY;
+
+        OBD_CHECK_DT_OP(obd, pool_add, -EOPNOTSUPP);
+        OBD_COUNTER_INCREMENT(obd, pool_add);
+
+        rc = OBP(obd, pool_add)(obd, poolname, ostname);
+        RETURN(rc);
+}
+
+static inline int obd_pool_rem(struct obd_device *obd, char *poolname, char *ostname)
+{
+        int rc;
+        ENTRY;
+
+        OBD_CHECK_DT_OP(obd, pool_rem, -EOPNOTSUPP);
+        OBD_COUNTER_INCREMENT(obd, pool_rem);
+
+        rc = OBP(obd, pool_rem)(obd, poolname, ostname);
+        RETURN(rc);
+}
+
+static inline void obd_getref(struct obd_device *obd)
+{
+        ENTRY;
+        if (OBT(obd) && OBP(obd, getref)) {
+                OBD_COUNTER_INCREMENT(obd, getref);
+                OBP(obd, getref)(obd);
+        }
+        EXIT;
+}
+
+static inline void obd_putref(struct obd_device *obd)
+{
+        ENTRY;
+        if (OBT(obd) && OBP(obd, putref)) {
+                OBD_COUNTER_INCREMENT(obd, putref);
+                OBP(obd, putref)(obd);
+        }
+        EXIT;
+}
+
 static inline int obd_init_export(struct obd_export *exp)
 {
         int rc = 0;
@@ -978,60 +1203,47 @@ static inline int obd_extent_calc(struct obd_export *exp,
 }
 
 static inline struct dentry *
-obd_lvfs_fid2dentry(struct obd_export *exp, __u64 id_ino, __u32 gen, __u64 gr)
+obd_lvfs_fid2dentry(struct obd_export *exp, struct ost_id *oi, __u32 gen)
 {
-        LASSERT(exp->exp_obd);
-
-        return lvfs_fid2dentry(&exp->exp_obd->obd_lvfs_ctxt, id_ino, gen, gr,
-                               exp->exp_obd);
-}
+       struct lvfs_run_ctxt *ctxt = &exp->exp_obd->obd_lvfs_ctxt;
+       LASSERT(exp->exp_obd);
 
-static inline int
-obd_lvfs_open_llog(struct obd_export *exp, __u64 id_ino, struct dentry *dentry)
-{
-        LASSERT(exp->exp_obd);
-        CERROR("FIXME what's the story here?  This needs to be an obd fn?\n");
-#if 0
-        return lvfs_open_llog(&exp->exp_obd->obd_lvfs_ctxt, id_ino,
-                              dentry, exp->exp_obd);
-#endif
-        return 0;
+       return ctxt->cb_ops.l_fid2dentry(ostid_id(oi), gen, ostid_seq(oi),
+                                        exp->exp_obd);
 }
 
-#ifndef time_before
-#define time_before(t1, t2) ((long)t2 - (long)t1 > 0)
-#endif
-
 /* @max_age is the oldest time in jiffies that we accept using a cached data.
  * If the cache is older than @max_age we will get a new value from the
  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
-static inline int obd_statfs_async(struct obd_device *obd,
+static inline int obd_statfs_async(struct obd_export *exp,
                                    struct obd_info *oinfo,
                                    __u64 max_age,
                                    struct ptlrpc_request_set *rqset)
 {
         int rc = 0;
+        struct obd_device *obd;
         ENTRY;
 
-        if (obd == NULL)
+        if (exp == NULL || exp->exp_obd == NULL)
                 RETURN(-EINVAL);
 
+        obd = exp->exp_obd;
         OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
         OBD_COUNTER_INCREMENT(obd, statfs);
 
         CDEBUG(D_SUPER, "%s: osfs %p age "LPU64", max_age "LPU64"\n",
                obd->obd_name, &obd->obd_osfs, obd->obd_osfs_age, max_age);
         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
-                rc = OBP(obd, statfs_async)(obd, oinfo, max_age, rqset);
+                rc = OBP(obd, statfs_async)(exp, oinfo, max_age, rqset);
         } else {
                 CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
                        " objects "LPU64"/"LPU64"\n",
                        obd->obd_name, &obd->obd_osfs,
                        obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
                        obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
-                spin_lock(&obd->obd_osfs_lock);
-                memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
-                spin_unlock(&obd->obd_osfs_lock);
+               spin_lock(&obd->obd_osfs_lock);
+               memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
+               spin_unlock(&obd->obd_osfs_lock);
                 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
                 if (oinfo->oi_cb_up)
                         oinfo->oi_cb_up(oinfo, 0);
@@ -1039,7 +1251,7 @@ static inline int obd_statfs_async(struct obd_device *obd,
         RETURN(rc);
 }
 
-static inline int obd_statfs_rqset(struct obd_device *obd,
+static inline int obd_statfs_rqset(struct obd_export *exp,
                                    struct obd_statfs *osfs, __u64 max_age,
                                    __u32 flags)
 {
@@ -1054,7 +1266,7 @@ static inline int obd_statfs_rqset(struct obd_device *obd,
 
         oinfo.oi_osfs = osfs;
         oinfo.oi_flags = flags;
-        rc = obd_statfs_async(obd, &oinfo, max_age, set);
+        rc = obd_statfs_async(exp, &oinfo, max_age, set);
         if (rc == 0)
                 rc = ptlrpc_set_wait(set);
         ptlrpc_set_destroy(set);
@@ -1064,10 +1276,12 @@ static inline int obd_statfs_rqset(struct obd_device *obd,
 /* @max_age is the oldest time in jiffies that we accept using a cached data.
  * If the cache is older than @max_age we will get a new value from the
  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
-static inline int obd_statfs(struct obd_device *obd, struct obd_statfs *osfs,
-                             __u64 max_age, __u32 flags)
+static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
+                             struct obd_statfs *osfs, __u64 max_age,
+                             __u32 flags)
 {
         int rc = 0;
+        struct obd_device *obd = exp->exp_obd;
         ENTRY;
 
         if (obd == NULL)
@@ -1079,29 +1293,50 @@ static inline int obd_statfs(struct obd_device *obd, struct obd_statfs *osfs,
         CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
                obd->obd_osfs_age, max_age);
         if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
-                rc = OBP(obd, statfs)(obd, osfs, max_age, flags);
+                rc = OBP(obd, statfs)(env, exp, osfs, max_age, flags);
                 if (rc == 0) {
-                        spin_lock(&obd->obd_osfs_lock);
-                        memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
-                        obd->obd_osfs_age = cfs_time_current_64();
-                        spin_unlock(&obd->obd_osfs_lock);
-                }
-        } else {
-                CDEBUG(D_SUPER,"%s: use %p cache blocks "LPU64"/"LPU64
-                       " objects "LPU64"/"LPU64"\n",
-                       obd->obd_name, &obd->obd_osfs,
-                       obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
-                       obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
-                spin_lock(&obd->obd_osfs_lock);
-                memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
-                spin_unlock(&obd->obd_osfs_lock);
-        }
+                       spin_lock(&obd->obd_osfs_lock);
+                       memcpy(&obd->obd_osfs, osfs, sizeof(obd->obd_osfs));
+                       obd->obd_osfs_age = cfs_time_current_64();
+                       spin_unlock(&obd->obd_osfs_lock);
+               }
+       } else {
+               CDEBUG(D_SUPER, "%s: use %p cache blocks "LPU64"/"LPU64
+                      " objects "LPU64"/"LPU64"\n",
+                      obd->obd_name, &obd->obd_osfs,
+                      obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
+                      obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
+               spin_lock(&obd->obd_osfs_lock);
+               memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
+               spin_unlock(&obd->obd_osfs_lock);
+       }
+       RETURN(rc);
+}
+
+static inline int obd_sync_rqset(struct obd_export *exp, struct obd_info *oinfo,
+                                 obd_size start, obd_size end)
+{
+        struct ptlrpc_request_set *set = NULL;
+        int rc;
+        ENTRY;
+
+        OBD_CHECK_DT_OP(exp->exp_obd, sync, -EOPNOTSUPP);
+        EXP_COUNTER_INCREMENT(exp, sync);
+
+        set =  ptlrpc_prep_set();
+        if (set == NULL)
+                RETURN(-ENOMEM);
+
+        rc = OBP(exp->exp_obd, sync)(NULL, exp, oinfo, start, end, set);
+        if (rc == 0)
+                rc = ptlrpc_set_wait(set);
+        ptlrpc_set_destroy(set);
         RETURN(rc);
 }
 
-static inline int obd_sync(struct obd_export *exp, struct obdo *oa,
-                           struct lov_stripe_md *ea, obd_size start,
-                           obd_size end, void *capa)
+static inline int obd_sync(const struct lu_env *env, struct obd_export *exp,
+                           struct obd_info *oinfo, obd_size start, obd_size end,
+                           struct ptlrpc_request_set *set)
 {
         int rc;
         ENTRY;
@@ -1109,7 +1344,7 @@ static inline int obd_sync(struct obd_export *exp, struct obdo *oa,
         OBD_CHECK_DT_OP(exp->exp_obd, sync, -EOPNOTSUPP);
         EXP_COUNTER_INCREMENT(exp, sync);
 
-        rc = OBP(exp->exp_obd, sync)(exp, oa, ea, start, end, capa);
+        rc = OBP(exp->exp_obd, sync)(env, exp, oinfo, start, end, set);
         RETURN(rc);
 }
 
@@ -1128,15 +1363,15 @@ static inline int obd_punch_rqset(struct obd_export *exp,
         if (set == NULL)
                 RETURN(-ENOMEM);
 
-        rc = OBP(exp->exp_obd, punch)(exp, oinfo, oti, set);
+        rc = OBP(exp->exp_obd, punch)(NULL, exp, oinfo, oti, set);
         if (rc == 0)
                 rc = ptlrpc_set_wait(set);
         ptlrpc_set_destroy(set);
         RETURN(rc);
 }
 
-static inline int obd_punch(struct obd_export *exp, struct obd_info *oinfo,
-                            struct obd_trans_info *oti,
+static inline int obd_punch(const struct lu_env *env, struct obd_export *exp,
+                            struct obd_info *oinfo, struct obd_trans_info *oti,
                             struct ptlrpc_request_set *rqset)
 {
         int rc;
@@ -1145,7 +1380,7 @@ static inline int obd_punch(struct obd_export *exp, struct obd_info *oinfo,
         EXP_CHECK_DT_OP(exp, punch);
         EXP_COUNTER_INCREMENT(exp, punch);
 
-        rc = OBP(exp->exp_obd, punch)(exp, oinfo, oti, rqset);
+        rc = OBP(exp->exp_obd, punch)(env, exp, oinfo, oti, rqset);
         RETURN(rc);
 }
 
@@ -1169,233 +1404,10 @@ static inline int obd_brw(int cmd, struct obd_export *exp,
         RETURN(rc);
 }
 
-static inline int obd_brw_async(int cmd, struct obd_export *exp,
-                                struct obd_info *oinfo, obd_count oa_bufs,
-                                struct brw_page *pg, struct obd_trans_info *oti,
-                                struct ptlrpc_request_set *set)
-{
-        int rc;
-        ENTRY;
-
-        EXP_CHECK_DT_OP(exp, brw_async);
-        EXP_COUNTER_INCREMENT(exp, brw_async);
-
-        if (!(cmd & OBD_BRW_RWMASK)) {
-                CERROR("obd_brw: cmd must be OBD_BRW_READ or OBD_BRW_WRITE\n");
-                LBUG();
-        }
-
-        rc = OBP(exp->exp_obd, brw_async)(cmd, exp, oinfo, oa_bufs, pg,oti,set);
-        RETURN(rc);
-}
-
-static inline int obd_brw_rqset(int cmd, struct obd_export *exp,
-                                struct obdo *oa, struct lov_stripe_md *lsm,
-                                obd_count oa_bufs, struct brw_page *pg,
-                                struct obd_trans_info *oti,
-                                struct obd_capa *ocapa)
-{
-        struct ptlrpc_request_set *set = NULL;
-        struct obd_info oinfo = { { { 0 } } };
-        int rc = 0;
-        ENTRY;
-
-        set =  ptlrpc_prep_set();
-        if (set == NULL)
-                RETURN(-ENOMEM);
-
-        oinfo.oi_oa = oa;
-        oinfo.oi_md = lsm;
-        oinfo.oi_capa = ocapa;
-        rc = obd_brw_async(cmd, exp, &oinfo, oa_bufs, pg, oti, set);
-        if (rc == 0) {
-                rc = ptlrpc_set_wait(set);
-                if (rc)
-                        CERROR("error from callback: rc = %d\n", rc);
-        } else {
-                CDEBUG(rc == -ENOSPC ? D_INODE : D_ERROR,
-                       "error from obd_brw_async: rc = %d\n", rc);
-        }
-        ptlrpc_set_destroy(set);
-        RETURN(rc);
-}
-
-static inline  int obd_prep_async_page(struct obd_export *exp,
-                                       struct lov_stripe_md *lsm,
-                                       struct lov_oinfo *loi,
-                                       cfs_page_t *page, obd_off offset,
-                                       struct obd_async_page_ops *ops,
-                                       void *data, void **res, int nocache,
-                                       struct lustre_handle *lockh)
-{
-        int ret;
-        ENTRY;
-
-        EXP_CHECK_DT_OP(exp, prep_async_page);
-        EXP_COUNTER_INCREMENT(exp, prep_async_page);
-
-        ret = OBP(exp->exp_obd, prep_async_page)(exp, lsm, loi, page, offset,
-                                                 ops, data, res, nocache,
-                                                 lockh);
-        RETURN(ret);
-}
-
-/**
- * Checks if requested extent lock is compatible with a lock under the page.
- *
- * Checks if the lock under \a page is compatible with a read or write lock
- * (specified by \a rw) for an extent [\a start , \a end].
- *
- * \param exp obd export (lov or osc)
- * \param lsm striping information for the file
- * \param res async_page placeholder
- * \param rw OBD_BRW_READ if requested for reading,
- *           OBD_BRW_WRITE if requested for writing
- * \param start start of the requested extent
- * \param end end of the requested extent
- * \param cookie transparent parameter for passing locking context
- *
- * \post result == 1, *cookie == context, appropriate lock is referenced or
- *
- * \retval 1 owned lock is reused for the request
- * \retval 0 no lock reused for the request
- * \retval -ENOTSUPP reget_short_lock is not exported at this layer
- *
- * \see obd_release_short_lock
- */
-static inline int obd_reget_short_lock(struct obd_export *exp,
-                                       struct lov_stripe_md *lsm,
-                                       void **res, int rw,
-                                       obd_off start, obd_off end,
-                                       void **cookie)
-{
-        ENTRY;
-
-        EXP_CHECK_DT_OP(exp, reget_short_lock);
-        EXP_COUNTER_INCREMENT(exp, reget_short_lock);
-
-        RETURN(OBP(exp->exp_obd, reget_short_lock)(exp, lsm, res, rw,
-                                                   start, end, cookie));
-}
-
-
-/**
- * Releases a reference to a lock taken in a "fast" way.
- *
- * Releases a read or write (specified by \a rw) lock
- * referenced by \a cookie.
- *
- * \param exp obd export (lov or osc)
- * \param lsm striping information for the file
- * \param end end of the locked extent
- * \param rw OBD_BRW_READ if requested for reading,
- *           OBD_BRW_WRITE if requested for writing
- * \param cookie transparent parameter for passing locking context
- *
- * \post appropriate lock is dereferenced
- *
- * \see obd_reget_short_lock
- */
-static inline int obd_release_short_lock(struct obd_export *exp,
-                                         struct lov_stripe_md *lsm, obd_off end,
-                                         void *cookie, int rw)
-{
-        ENTRY;
-
-        EXP_CHECK_DT_OP(exp, release_short_lock);
-        EXP_COUNTER_INCREMENT(exp, release_short_lock);
-
-        RETURN(OBP(exp->exp_obd, release_short_lock)(exp, lsm, end,
-                                                     cookie, rw));
-}
-
-static inline int obd_queue_async_io(struct obd_export *exp,
-                                     struct lov_stripe_md *lsm,
-                                     struct lov_oinfo *loi, void *cookie,
-                                     int cmd, obd_off off, int count,
-                                     obd_flag brw_flags, obd_flag async_flags)
-{
-        int rc;
-        ENTRY;
-
-        EXP_CHECK_DT_OP(exp, queue_async_io);
-        EXP_COUNTER_INCREMENT(exp, queue_async_io);
-        LASSERT(cmd & OBD_BRW_RWMASK);
-
-        rc = OBP(exp->exp_obd, queue_async_io)(exp, lsm, loi, cookie, cmd, off,
-                                               count, brw_flags, async_flags);
-        RETURN(rc);
-}
-
-static inline int obd_set_async_flags(struct obd_export *exp,
-                                      struct lov_stripe_md *lsm,
-                                      struct lov_oinfo *loi, void *cookie,
-                                      obd_flag async_flags)
-{
-        int rc;
-        ENTRY;
-
-        EXP_CHECK_DT_OP(exp, set_async_flags);
-        EXP_COUNTER_INCREMENT(exp, set_async_flags);
-
-        rc = OBP(exp->exp_obd, set_async_flags)(exp, lsm, loi, cookie,
-                                                async_flags);
-        RETURN(rc);
-}
-
-static inline int obd_queue_group_io(struct obd_export *exp,
-                                     struct lov_stripe_md *lsm,
-                                     struct lov_oinfo *loi,
-                                     struct obd_io_group *oig,
-                                     void *cookie, int cmd, obd_off off,
-                                     int count, obd_flag brw_flags,
-                                     obd_flag async_flags)
-{
-        int rc;
-        ENTRY;
-
-        EXP_CHECK_DT_OP(exp, queue_group_io);
-        EXP_COUNTER_INCREMENT(exp, queue_group_io);
-        LASSERT(cmd & OBD_BRW_RWMASK);
-
-        rc = OBP(exp->exp_obd, queue_group_io)(exp, lsm, loi, oig, cookie,
-                                               cmd, off, count, brw_flags,
-                                               async_flags);
-        RETURN(rc);
-}
-
-static inline int obd_trigger_group_io(struct obd_export *exp,
-                                       struct lov_stripe_md *lsm,
-                                       struct lov_oinfo *loi,
-                                       struct obd_io_group *oig)
-{
-        int rc;
-        ENTRY;
-
-        EXP_CHECK_DT_OP(exp, trigger_group_io);
-        EXP_COUNTER_INCREMENT(exp, trigger_group_io);
-
-        rc = OBP(exp->exp_obd, trigger_group_io)(exp, lsm, loi, oig);
-        RETURN(rc);
-}
-
-static inline int obd_teardown_async_page(struct obd_export *exp,
-                                          struct lov_stripe_md *lsm,
-                                          struct lov_oinfo *loi, void *cookie)
-{
-        int rc;
-        ENTRY;
-
-        EXP_CHECK_DT_OP(exp, teardown_async_page);
-        EXP_COUNTER_INCREMENT(exp, teardown_async_page);
-
-        rc = OBP(exp->exp_obd, teardown_async_page)(exp, lsm, loi, cookie);
-        RETURN(rc);
-}
-
-static inline int obd_preprw(int cmd, struct obd_export *exp, struct obdo *oa,
+static inline int obd_preprw(const struct lu_env *env, int cmd,
+                             struct obd_export *exp, struct obdo *oa,
                              int objcount, struct obd_ioobj *obj,
-                             int niocount, struct niobuf_remote *remote,
+                             struct niobuf_remote *remote, int *pages,
                              struct niobuf_local *local,
                              struct obd_trans_info *oti,
                              struct lustre_capa *capa)
@@ -1406,14 +1418,16 @@ static inline int obd_preprw(int cmd, struct obd_export *exp, struct obdo *oa,
         EXP_CHECK_DT_OP(exp, preprw);
         EXP_COUNTER_INCREMENT(exp, preprw);
 
-        rc = OBP(exp->exp_obd, preprw)(cmd, exp, oa, objcount, obj, niocount,
-                                       remote, local, oti, capa);
+        rc = OBP(exp->exp_obd, preprw)(env, cmd, exp, oa, objcount, obj, remote,
+                                       pages, local, oti, capa);
         RETURN(rc);
 }
 
-static inline int obd_commitrw(int cmd, struct obd_export *exp, struct obdo *oa,
+static inline int obd_commitrw(const struct lu_env *env, int cmd,
+                               struct obd_export *exp, struct obdo *oa,
                                int objcount, struct obd_ioobj *obj,
-                               int niocount, struct niobuf_local *local,
+                               struct niobuf_remote *rnb, int pages,
+                               struct niobuf_local *local,
                                struct obd_trans_info *oti, int rc)
 {
         ENTRY;
@@ -1421,8 +1435,8 @@ static inline int obd_commitrw(int cmd, struct obd_export *exp, struct obdo *oa,
         EXP_CHECK_DT_OP(exp, commitrw);
         EXP_COUNTER_INCREMENT(exp, commitrw);
 
-        rc = OBP(exp->exp_obd, commitrw)(cmd, exp, oa, objcount, obj, niocount,
-                                         local, oti, rc);
+        rc = OBP(exp->exp_obd, commitrw)(env, cmd, exp, oa, objcount, obj,
+                                         rnb, pages, local, oti, rc);
         RETURN(rc);
 }
 
@@ -1504,32 +1518,31 @@ static inline int obd_enqueue(struct obd_export *exp,
         RETURN(rc);
 }
 
-static inline int obd_match(struct obd_export *exp, struct lov_stripe_md *ea,
-                            __u32 type, ldlm_policy_data_t *policy, __u32 mode,
-                            int *flags, void *data, struct lustre_handle *lockh)
+static inline int obd_change_cbdata(struct obd_export *exp,
+                                    struct lov_stripe_md *lsm,
+                                    ldlm_iterator_t it, void *data)
 {
         int rc;
         ENTRY;
 
-        EXP_CHECK_DT_OP(exp, match);
-        EXP_COUNTER_INCREMENT(exp, match);
+        EXP_CHECK_DT_OP(exp, change_cbdata);
+        EXP_COUNTER_INCREMENT(exp, change_cbdata);
 
-        rc = OBP(exp->exp_obd, match)(exp, ea, type, policy, mode, flags, data,
-                                      lockh);
+        rc = OBP(exp->exp_obd, change_cbdata)(exp, lsm, it, data);
         RETURN(rc);
 }
 
-static inline int obd_change_cbdata(struct obd_export *exp,
-                                    struct lov_stripe_md *lsm,
-                                    ldlm_iterator_t it, void *data)
+static inline int obd_find_cbdata(struct obd_export *exp,
+                                  struct lov_stripe_md *lsm,
+                                  ldlm_iterator_t it, void *data)
 {
         int rc;
         ENTRY;
 
-        EXP_CHECK_DT_OP(exp, change_cbdata);
-        EXP_COUNTER_INCREMENT(exp, change_cbdata);
+        EXP_CHECK_DT_OP(exp, find_cbdata);
+        EXP_COUNTER_INCREMENT(exp, find_cbdata);
 
-        rc = OBP(exp->exp_obd, change_cbdata)(exp, lsm, it, data);
+        rc = OBP(exp->exp_obd, find_cbdata)(exp, lsm, it, data);
         RETURN(rc);
 }
 
@@ -1549,7 +1562,8 @@ static inline int obd_cancel(struct obd_export *exp,
 
 static inline int obd_cancel_unused(struct obd_export *exp,
                                     struct lov_stripe_md *ea,
-                                    int flags, void *opaque)
+                                    ldlm_cancel_flags_t flags,
+                                    void *opaque)
 {
         int rc;
         ENTRY;
@@ -1561,19 +1575,6 @@ static inline int obd_cancel_unused(struct obd_export *exp,
         RETURN(rc);
 }
 
-static inline int obd_join_lru(struct obd_export *exp,
-                               struct lov_stripe_md *ea, int join)
-{
-        int rc;
-        ENTRY;
-
-        EXP_CHECK_DT_OP(exp, join_lru);
-        EXP_COUNTER_INCREMENT(exp, join_lru);
-
-        rc = OBP(exp->exp_obd, join_lru)(exp, ea, join);
-        RETURN(rc);
-}
-
 static inline int obd_pin(struct obd_export *exp, const struct lu_fid *fid,
                           struct obd_capa *oc, struct obd_client_handle *handle,
                           int flag)
@@ -1652,7 +1653,7 @@ static inline int obd_notify(struct obd_device *obd,
         }
 
         if (!OBP(obd, notify)) {
-                CERROR("obd %s has no notify handler\n", obd->obd_name);
+                CDEBUG(D_HA, "obd %s has no notify handler\n", obd->obd_name);
                 RETURN(-ENOSYS);
         }
 
@@ -1680,7 +1681,8 @@ static inline int obd_notify_observer(struct obd_device *observer,
          */
         onu = &observer->obd_upcall;
         if (onu->onu_upcall != NULL)
-                rc2 = onu->onu_upcall(observer, observed, ev, onu->onu_owner);
+                rc2 = onu->onu_upcall(observer, observed, ev,
+                                      onu->onu_owner, NULL);
         else
                 rc2 = 0;
 
@@ -1696,7 +1698,7 @@ static inline int obd_quotacheck(struct obd_export *exp,
         EXP_CHECK_DT_OP(exp, quotacheck);
         EXP_COUNTER_INCREMENT(exp, quotacheck);
 
-        rc = OBP(exp->exp_obd, quotacheck)(exp, oqctl);
+        rc = OBP(exp->exp_obd, quotacheck)(exp->exp_obd, exp, oqctl);
         RETURN(rc);
 }
 
@@ -1709,11 +1711,12 @@ static inline int obd_quotactl(struct obd_export *exp,
         EXP_CHECK_DT_OP(exp, quotactl);
         EXP_COUNTER_INCREMENT(exp, quotactl);
 
-        rc = OBP(exp->exp_obd, quotactl)(exp, oqctl);
+        rc = OBP(exp->exp_obd, quotactl)(exp->exp_obd, exp, oqctl);
         RETURN(rc);
 }
 
-static inline int obd_health_check(struct obd_device *obd)
+static inline int obd_health_check(const struct lu_env *env,
+                                   struct obd_device *obd)
 {
         /* returns: 0 on healthy
          *         >0 on unhealthy + reason code/flag
@@ -1735,7 +1738,7 @@ static inline int obd_health_check(struct obd_device *obd)
         if (!OBP(obd, health_check))
                 RETURN(0);
 
-        rc = OBP(obd, health_check)(obd);
+        rc = OBP(obd, health_check)(env, obd);
         RETURN(rc);
 }
 
@@ -1744,12 +1747,38 @@ static inline int obd_register_observer(struct obd_device *obd,
 {
         ENTRY;
         OBD_CHECK_DEV(obd);
-        if (obd->obd_observer && observer)
+       down_write(&obd->obd_observer_link_sem);
+        if (obd->obd_observer && observer) {
+               up_write(&obd->obd_observer_link_sem);
                 RETURN(-EALREADY);
+        }
         obd->obd_observer = observer;
+       up_write(&obd->obd_observer_link_sem);
+        RETURN(0);
+}
+
+static inline int obd_pin_observer(struct obd_device *obd,
+                                   struct obd_device **observer)
+{
+        ENTRY;
+       down_read(&obd->obd_observer_link_sem);
+        if (!obd->obd_observer) {
+                *observer = NULL;
+               up_read(&obd->obd_observer_link_sem);
+                RETURN(-ENOENT);
+        }
+        *observer = obd->obd_observer;
+        RETURN(0);
+}
+
+static inline int obd_unpin_observer(struct obd_device *obd)
+{
+        ENTRY;
+       up_read(&obd->obd_observer_link_sem);
         RETURN(0);
 }
 
+#if 0
 static inline int obd_register_page_removal_cb(struct obd_export *exp,
                                                obd_page_removal_cb_t cb,
                                                obd_pin_extent_cb pin_cb)
@@ -1802,6 +1831,7 @@ static inline int obd_unregister_lock_cancel_cb(struct obd_export *exp,
         rc = OBP(exp->exp_obd, unregister_lock_cancel_cb)(exp, cb);
         RETURN(rc);
 }
+#endif
 
 /* metadata helpers */
 static inline int md_getstatus(struct obd_export *exp,
@@ -1816,28 +1846,37 @@ static inline int md_getstatus(struct obd_export *exp,
         RETURN(rc);
 }
 
-static inline int md_getattr(struct obd_export *exp, const struct lu_fid *fid,
-                             struct obd_capa *oc, obd_valid valid, int ea_size,
+static inline int md_getattr(struct obd_export *exp, struct md_op_data *op_data,
                              struct ptlrpc_request **request)
 {
         int rc;
         ENTRY;
         EXP_CHECK_MD_OP(exp, getattr);
         EXP_MD_COUNTER_INCREMENT(exp, getattr);
-        rc = MDP(exp->exp_obd, getattr)(exp, fid, oc, valid,
-                                        ea_size, request);
+        rc = MDP(exp->exp_obd, getattr)(exp, op_data, request);
         RETURN(rc);
 }
 
-static inline int md_change_cbdata(struct obd_export *exp,
-                                   const struct lu_fid *fid,
-                                   ldlm_iterator_t it, void *data)
+static inline int md_null_inode(struct obd_export *exp,
+                                   const struct lu_fid *fid)
+{
+        int rc;
+        ENTRY;
+        EXP_CHECK_MD_OP(exp, null_inode);
+        EXP_MD_COUNTER_INCREMENT(exp, null_inode);
+        rc = MDP(exp->exp_obd, null_inode)(exp, fid);
+        RETURN(rc);
+}
+
+static inline int md_find_cbdata(struct obd_export *exp,
+                                 const struct lu_fid *fid,
+                                 ldlm_iterator_t it, void *data)
 {
         int rc;
         ENTRY;
-        EXP_CHECK_MD_OP(exp, change_cbdata);
-        EXP_MD_COUNTER_INCREMENT(exp, change_cbdata);
-        rc = MDP(exp->exp_obd, change_cbdata)(exp, fid, it, data);
+        EXP_CHECK_MD_OP(exp, find_cbdata);
+        EXP_MD_COUNTER_INCREMENT(exp, find_cbdata);
+        rc = MDP(exp->exp_obd, find_cbdata)(exp, fid, it, data);
         RETURN(rc);
 }
 
@@ -1898,33 +1937,30 @@ static inline int md_enqueue(struct obd_export *exp,
 }
 
 static inline int md_getattr_name(struct obd_export *exp,
-                                  const struct lu_fid *fid, struct obd_capa *oc,
-                                  const char *name, int namelen,
-                                  obd_valid valid, int ea_size, __u32 suppgid,
+                                  struct md_op_data *op_data,
                                   struct ptlrpc_request **request)
 {
         int rc;
         ENTRY;
         EXP_CHECK_MD_OP(exp, getattr_name);
         EXP_MD_COUNTER_INCREMENT(exp, getattr_name);
-        rc = MDP(exp->exp_obd, getattr_name)(exp, fid, oc, name, namelen,
-                                             valid, ea_size, suppgid, request);
+        rc = MDP(exp->exp_obd, getattr_name)(exp, op_data, request);
         RETURN(rc);
 }
 
 static inline int md_intent_lock(struct obd_export *exp,
-                                 struct md_op_data *op_data, void *lmm,
-                                 int lmmsize, struct lookup_intent *it,
-                                 int flags, struct ptlrpc_request **reqp,
-                                 ldlm_blocking_callback cb_blocking,
-                                 int extra_lock_flags)
+                                struct md_op_data *op_data, void *lmm,
+                                int lmmsize, struct lookup_intent *it,
+                                int lookup_flags, struct ptlrpc_request **reqp,
+                                ldlm_blocking_callback cb_blocking,
+                                __u64 extra_lock_flags)
 {
         int rc;
         ENTRY;
         EXP_CHECK_MD_OP(exp, intent_lock);
         EXP_MD_COUNTER_INCREMENT(exp, intent_lock);
         rc = MDP(exp->exp_obd, intent_lock)(exp, op_data, lmm, lmmsize,
-                                            it, flags, reqp, cb_blocking,
+                                            it, lookup_flags, reqp, cb_blocking,
                                             extra_lock_flags);
         RETURN(rc);
 }
@@ -1991,16 +2027,15 @@ static inline int md_sync(struct obd_export *exp, const struct lu_fid *fid,
         RETURN(rc);
 }
 
-static inline int md_readpage(struct obd_export *exp, const struct lu_fid *fid,
-                              struct obd_capa *oc, __u64 offset,
-                              struct page *page,
+static inline int md_readpage(struct obd_export *exp, struct md_op_data *opdata,
+                              struct page **pages,
                               struct ptlrpc_request **request)
 {
         int rc;
         ENTRY;
         EXP_CHECK_MD_OP(exp, readpage);
         EXP_MD_COUNTER_INCREMENT(exp, readpage);
-        rc = MDP(exp->exp_obd, readpage)(exp, fid, oc, offset, page, request);
+        rc = MDP(exp->exp_obd, readpage)(exp, opdata, pages, request);
         RETURN(rc);
 }
 
@@ -2086,18 +2121,20 @@ static inline int md_clear_open_replay_data(struct obd_export *exp,
 }
 
 static inline int md_set_lock_data(struct obd_export *exp,
-                                   __u64 *lockh, void *data)
+                                   __u64 *lockh, void *data, __u64 *bits)
 {
         ENTRY;
         EXP_CHECK_MD_OP(exp, set_lock_data);
         EXP_MD_COUNTER_INCREMENT(exp, set_lock_data);
-        RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data));
+        RETURN(MDP(exp->exp_obd, set_lock_data)(exp, lockh, data, bits));
 }
 
 static inline int md_cancel_unused(struct obd_export *exp,
                                    const struct lu_fid *fid,
                                    ldlm_policy_data_t *policy,
-                                   ldlm_mode_t mode, int flags, void *opaque)
+                                   ldlm_mode_t mode,
+                                   ldlm_cancel_flags_t flags,
+                                   void *opaque)
 {
         int rc;
         ENTRY;
@@ -2110,7 +2147,7 @@ static inline int md_cancel_unused(struct obd_export *exp,
         RETURN(rc);
 }
 
-static inline ldlm_mode_t md_lock_match(struct obd_export *exp, int flags,
+static inline ldlm_mode_t md_lock_match(struct obd_export *exp, __u64 flags,
                                         const struct lu_fid *fid,
                                         ldlm_type_t type,
                                         ldlm_policy_data_t *policy,
@@ -2157,6 +2194,19 @@ static inline int md_renew_capa(struct obd_export *exp, struct obd_capa *ocapa,
         RETURN(rc);
 }
 
+static inline int md_unpack_capa(struct obd_export *exp,
+                                 struct ptlrpc_request *req,
+                                 const struct req_msg_field *field,
+                                 struct obd_capa **oc)
+{
+        int rc;
+        ENTRY;
+        EXP_CHECK_MD_OP(exp, unpack_capa);
+        EXP_MD_COUNTER_INCREMENT(exp, unpack_capa);
+        rc = MDP(exp->exp_obd, unpack_capa)(exp, req, field, oc);
+        RETURN(rc);
+}
+
 static inline int md_intent_getattr_async(struct obd_export *exp,
                                           struct md_enqueue_info *minfo,
                                           struct ldlm_enqueue_info *einfo)
@@ -2171,13 +2221,13 @@ static inline int md_intent_getattr_async(struct obd_export *exp,
 
 static inline int md_revalidate_lock(struct obd_export *exp,
                                      struct lookup_intent *it,
-                                     struct lu_fid *fid)
+                                     struct lu_fid *fid, __u64 *bits)
 {
         int rc;
         ENTRY;
         EXP_CHECK_MD_OP(exp, revalidate_lock);
         EXP_MD_COUNTER_INCREMENT(exp, revalidate_lock);
-        rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid);
+        rc = MDP(exp->exp_obd, revalidate_lock)(exp, it, fid, bits);
         RETURN(rc);
 }
 
@@ -2188,11 +2238,11 @@ extern int obd_init_caches(void);
 extern void obd_cleanup_caches(void);
 
 /* support routines */
-extern cfs_mem_cache_t *obdo_cachep;
+extern struct kmem_cache *obdo_cachep;
 
 #define OBDO_ALLOC(ptr)                                                       \
 do {                                                                          \
-        OBD_SLAB_ALLOC_PTR((ptr), obdo_cachep);                               \
+       OBD_SLAB_ALLOC_PTR_GFP((ptr), obdo_cachep, __GFP_IO);             \
 } while(0)
 
 #define OBDO_FREE(ptr)                                                        \
@@ -2211,12 +2261,30 @@ static inline void fid2obdo(struct lu_fid *fid, struct obdo *oa)
         /* something here */
 }
 
+typedef int (*register_lwp_cb)(void *data);
+
+struct lwp_register_item {
+       struct obd_export **lri_exp;
+       register_lwp_cb     lri_cb_func;
+       void               *lri_cb_data;
+       cfs_list_t          lri_list;
+       char                lri_name[MTI_NAME_MAXLEN];
+};
+
 /* I'm as embarrassed about this as you are.
  *
  * <shaver> // XXX do not look into _superhack with remaining eye
  * <shaver> // XXX if this were any uglier, I'd get my own show on MTV */
 extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
 
+/* obd_mount.c */
+#ifdef HAVE_SERVER_SUPPORT
+int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
+                            register_lwp_cb cb_func, void *cb_data);
+void lustre_deregister_lwp_item(struct obd_export **exp);
+int tgt_name2lwpname(const char *tgt_name, char *lwp_name);
+#endif /* HAVE_SERVER_SUPPORT */
+
 /* sysctl.c */
 extern void obd_sysctl_init (void);
 extern void obd_sysctl_clean (void);
@@ -2229,6 +2297,7 @@ void class_uuid_unparse(class_uuid_t in, struct obd_uuid *out);
 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index);
 int class_add_uuid(const char *uuid, __u64 nid);
 int class_del_uuid (const char *uuid);
+int class_check_uuid(struct obd_uuid *uuid, __u64 nid);
 void class_init_uuidlist(void);
 void class_exit_uuidlist(void);
 
@@ -2237,6 +2306,6 @@ int mea_name2idx(struct lmv_stripe_md *mea, const char *name, int namelen);
 int raw_name2idx(int hashtype, int count, const char *name, int namelen);
 
 /* prng.c */
-void ll_generate_random_uuid(class_uuid_t uuid_out);
+#define ll_generate_random_uuid(uuid_out) cfs_get_random_bytes(uuid_out, sizeof(class_uuid_t))
 
 #endif /* __LINUX_OBD_CLASS_H */