lustre/include/linux/lustre_import.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2001  Cluster File Systems, Inc.
   5  *
   6  * This code is issued under the GNU General Public License.
   7  * See the file COPYING in this distribution
   8  */
   9
  10 #ifndef __IMPORT_H
  11 #define __IMPORT_H
  12
  13 #include <linux/lustre_handles.h>
  14 #include <linux/lustre_idl.h>
  15
  16 struct obd_import {
  17         struct portals_handle     imp_handle;
  18         atomic_t                  imp_refcount;
  19         struct lustre_handle      imp_dlm_handle; /* client's ldlm export */
  20         struct ptlrpc_connection *imp_connection;
  21         struct ptlrpc_client     *imp_client;
  22         struct list_head          imp_observers;
  23         struct list_head          imp_pinger_chain;
  24
  25         /* Lists of requests that are retained for replay, waiting for a reply,
  26          * or waiting for recovery to complete, respectively.
  27          */
  28         struct list_head          imp_replay_list;
  29         struct list_head          imp_sending_list;
  30         struct list_head          imp_delayed_list;
  31
  32         struct obd_device        *imp_obd;
  33         int                       imp_level;
  34         int                       imp_generation;
  35         __u64                     imp_max_transno;
  36         __u64                     imp_peer_committed_transno;
  37         struct obd_uuid           imp_target_uuid; /* XXX -> lustre_name */
  38         struct lustre_handle      imp_remote_handle;
  39
  40         /* Protects flags, level, generation, *_list */
  41         spinlock_t                imp_lock;
  42
  43         /* flags */
  44         int                       imp_invalid:1, imp_replayable:1,
  45                                   imp_dlm_fake:1;
  46         __u32                     imp_connect_op;
  47 };
  48
  49 typedef void (*obd_import_callback)(struct obd_import *imp, void *closure,
  50                                     int event, void *event_arg, void *cb_data);
  51
  52 struct obd_import_observer {
  53         struct list_head     oio_chain;
  54         obd_import_callback  oio_cb;
  55         void                *oio_cb_data;
  56 };
  57
  58 void class_observe_import(struct obd_import *imp, obd_import_callback cb,
  59                           void *cb_data);
  60 void class_unobserve_import(struct obd_import *imp, obd_import_callback cb,
  61                             void *cb_data);
  62 void class_notify_import_observers(struct obd_import *imp, int event,
  63                                    void *event_arg);
  64
  65 #define IMP_EVENT_ACTIVE   1
  66 #define IMP_EVENT_INACTIVE 2
  67
  68 /* genops.c */
  69 extern struct obd_import *class_conn2cliimp(struct lustre_handle *);
  70 extern struct obd_import *class_conn2ldlmimp(struct lustre_handle *);
  71
  72 #endif /* __IMPORT_H */