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
  18 struct mds_export_data {
  19         struct list_head        med_open_head;
  20         spinlock_t              med_open_lock;
  21         struct mds_client_data *med_mcd;
  22         loff_t                  med_off;
  23         int                     med_idx;
  24 };
  25
  26 struct osc_creator {
  27         spinlock_t              oscc_lock;
  28         struct list_head        oscc_list;
  29         struct obd_device       *oscc_obd;
  30         obd_id                  oscc_last_id;//last available pre-created object
  31         obd_id                  oscc_next_id;// what object id to give out next
  32         obd_id                  oscc_gr;
  33         int                     oscc_initial_create_count;
  34         int                     oscc_grow_count;
  35         int                     oscc_kick_barrier;
  36         struct osc_created     *oscc_osccd;
  37         struct obdo             oscc_oa;
  38         int                     oscc_flags;
  39         wait_queue_head_t       oscc_waitq; /* creating procs wait on this */
  40 };
  41
  42 struct ldlm_export_data {
  43         struct list_head       led_held_locks; /* protected by namespace lock */
  44 };
  45
  46 struct ec_export_data { /* echo client */
  47         struct list_head eced_locks;
  48 };
  49
  50 /* In-memory access to client data from OST struct */
  51 struct filter_client_data;
  52 struct obd_llogs;
  53 struct filter_export_data {
  54         spinlock_t                 fed_lock;      /* protects fed_open_head */
  55         __u32                      fed_group;
  56         struct filter_client_data *fed_fcd;
  57         loff_t                     fed_lr_off;
  58         int                        fed_lr_idx;
  59         unsigned long              fed_dirty;    /* in bytes */
  60         unsigned long              fed_grant;    /* in bytes */
  61         unsigned long              fed_pending;  /* bytes just being written */
  62 };
  63
  64 struct obd_export {
  65         struct portals_handle     exp_handle;
  66         atomic_t                  exp_refcount;
  67         atomic_t                  exp_rpc_count;
  68         struct obd_uuid           exp_client_uuid;
  69         struct list_head          exp_obd_chain;
  70         struct obd_device        *exp_obd;
  71         struct obd_import        *exp_imp_reverse; /* to make RPCs backwards */
  72         struct ptlrpc_connection *exp_connection;
  73         __u32                     exp_conn_cnt;
  74         struct ldlm_export_data   exp_ldlm_data;
  75         struct list_head          exp_outstanding_replies;
  76         time_t                    exp_last_request_time;
  77         spinlock_t                exp_lock; /* protects flags int below */
  78         /* ^ protects exp_outstanding_replies too */
  79         int                       exp_flags;
  80         int                       exp_failed:1;
  81         int                       exp_libclient:1; /* liblustre client? */
  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 */