lustre/include/linux/lustre_export.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 __EXPORT_H
  11 #define __EXPORT_H
  12
  13 #include <linux/lustre_idl.h>
  14 #include <linux/lustre_dlm.h>
  15
  16 struct mds_client_data;
  17 struct mds_idmap_table;
  18
  19 struct mds_export_data {
  20         struct list_head        med_open_head;
  21         spinlock_t              med_open_lock;
  22         struct mds_client_data *med_mcd;
  23         loff_t                  med_off;
  24         int                     med_idx;
  25         unsigned int            med_initialized:1,
  26                                 med_remote:1;
  27         __u32                   med_nllu;
  28         __u32                   med_nllg;
  29         struct mds_idmap_table *med_idmap;
  30 };
  31
  32 struct osc_creator {
  33         spinlock_t              oscc_lock;
  34         struct obd_device      *oscc_obd;
  35         int                     oscc_flags;
  36 };
  37
  38 struct ldlm_export_data {
  39         struct list_head       led_held_locks; /* protected by namespace lock */
  40 };
  41
  42 struct ec_export_data { /* echo client */
  43         struct list_head eced_locks;
  44 };
  45
  46 /* In-memory access to client data from OST struct */
  47 struct filter_client_data;
  48 struct obd_llogs;
  49 struct filter_export_data {
  50         spinlock_t                 fed_lock;      /* protects fed_open_head */
  51         __u32                      fed_group;
  52         struct filter_client_data *fed_fcd;
  53         loff_t                     fed_lr_off;
  54         int                        fed_lr_idx;
  55         long                       fed_dirty;    /* in bytes */
  56         long                       fed_grant;    /* in bytes */
  57         long                       fed_pending;  /* bytes just being written */
  58 };
  59
  60 struct obd_export {
  61         struct portals_handle     exp_handle;
  62         atomic_t                  exp_refcount;
  63         atomic_t                  exp_rpc_count;
  64         struct obd_uuid           exp_client_uuid;
  65         struct list_head          exp_obd_chain;
  66         struct obd_device        *exp_obd;
  67         struct obd_import        *exp_imp_reverse; /* to make RPCs backwards */
  68         struct ptlrpc_connection *exp_connection;
  69         __u32                     exp_conn_cnt;
  70         struct ldlm_export_data   exp_ldlm_data;
  71         struct list_head          exp_outstanding_replies;
  72         time_t                    exp_last_request_time;
  73         spinlock_t                exp_lock; /* protects flags int below */
  74         /* ^ protects exp_outstanding_replies too */
  75         unsigned long             exp_flags;
  76         int                       exp_failed:1,
  77                                   exp_req_replay_needed:1,
  78                                   exp_lock_replay_needed:1,
  79                                   exp_connected:1,
  80                                   exp_libclient:1, /* liblustre client? */
  81                                   exp_sync:1;
  82         union {
  83                 struct mds_export_data    eu_mds_data;
  84                 struct filter_export_data eu_filter_data;
  85                 struct ec_export_data     eu_ec_data;
  86         } u;
  87 };
  88
  89 #define exp_mds_data    u.eu_mds_data
  90 #define exp_lov_data    u.eu_lov_data
  91 #define exp_filter_data u.eu_filter_data
  92 #define exp_ec_data     u.eu_ec_data
  93
  94 extern struct obd_export *class_conn2export(struct lustre_handle *conn);
  95 extern struct obd_device *class_conn2obd(struct lustre_handle *conn);
  96
  97 #endif /* __EXPORT_H */