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