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 list_head        oscc_list;
  35         struct obd_device       *oscc_obd;
  36         obd_id                  oscc_last_id;//last available pre-created object
  37         obd_id                  oscc_next_id;// what object id to give out next
  38         obd_id                  oscc_gr;
  39         int                     oscc_grow_count;
  40         int                     oscc_max_grow_count;
  41         int                     oscc_kick_barrier;
  42         struct osc_created     *oscc_osccd;
  43         struct obdo             oscc_oa;
  44         int                     oscc_flags;
  45         wait_queue_head_t       oscc_waitq; /* creating procs wait on this */
  46 };
  47
  48 struct ldlm_export_data {
  49         struct list_head       led_held_locks; /* protected by namespace lock */
  50 };
  51
  52 struct ec_export_data { /* echo client */
  53         struct list_head eced_locks;
  54 };
  55
  56 /* In-memory access to client data from OST struct */
  57 struct filter_client_data;
  58 struct obd_llogs;
  59 struct filter_export_data {
  60         spinlock_t                 fed_lock;      /* protects fed_open_head */
  61         __u32                      fed_group;
  62         struct filter_client_data *fed_fcd;
  63         loff_t                     fed_lr_off;
  64         int                        fed_lr_idx;
  65         long                       fed_dirty;    /* in bytes */
  66         long                       fed_grant;    /* in bytes */
  67         long                       fed_pending;  /* bytes just being written */
  68 };
  69
  70 struct obd_export {
  71         struct portals_handle     exp_handle;
  72         atomic_t                  exp_refcount;
  73         atomic_t                  exp_rpc_count;
  74         struct obd_uuid           exp_client_uuid;
  75         struct list_head          exp_obd_chain;
  76         struct obd_device        *exp_obd;
  77         struct obd_import        *exp_imp_reverse; /* to make RPCs backwards */
  78         struct ptlrpc_connection *exp_connection;
  79         __u32                     exp_conn_cnt;
  80         struct ldlm_export_data   exp_ldlm_data;
  81         struct list_head          exp_outstanding_replies;
  82         time_t                    exp_last_request_time;
  83         spinlock_t                exp_lock; /* protects flags int below */
  84         /* ^ protects exp_outstanding_replies too */
  85         unsigned long             exp_flags;
  86         int                       exp_failed:1,
  87                                   exp_req_replay_needed:1,
  88                                   exp_lock_replay_needed:1,
  89                                   exp_libclient:1, /* liblustre client? */
  90                                   exp_sync:1;
  91         union {
  92                 struct mds_export_data    eu_mds_data;
  93                 struct filter_export_data eu_filter_data;
  94                 struct ec_export_data     eu_ec_data;
  95         } u;
  96 };
  97
  98 #define exp_mds_data    u.eu_mds_data
  99 #define exp_lov_data    u.eu_lov_data
 100 #define exp_filter_data u.eu_filter_data
 101 #define exp_ec_data     u.eu_ec_data
 102
 103 extern struct obd_export *class_conn2export(struct lustre_handle *conn);
 104 extern struct obd_device *class_conn2obd(struct lustre_handle *conn);
 105
 106 #endif /* __EXPORT_H */