lustre/include/lustre_export.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  */
   4
   5 #ifndef __EXPORT_H
   6 #define __EXPORT_H
   7
   8 #include <lustre/lustre_idl.h>
   9 #include <lustre_dlm.h>
  10 #include <lprocfs_status.h>
  11
  12 /* Data stored per client in the last_rcvd file.  In le32 order. */
  13 struct mds_client_data;
  14
  15 struct mds_export_data {
  16         struct list_head        med_open_head;
  17         spinlock_t              med_open_lock; /* lock med_open_head, mfd_list*/
  18         struct mds_client_data *med_mcd;
  19         __u64                   med_ibits_known;
  20         loff_t                  med_lr_off;
  21         int                     med_lr_idx;
  22 };
  23
  24 struct osc_creator {
  25         spinlock_t              oscc_lock;
  26         struct list_head        oscc_list;
  27         struct obd_device       *oscc_obd;
  28         obd_id                  oscc_last_id;//last available pre-created object
  29         obd_id                  oscc_next_id;// what object id to give out next
  30         int                     oscc_grow_count;
  31         struct obdo             oscc_oa;
  32         int                     oscc_flags;
  33         cfs_waitq_t             oscc_waitq; /* creating procs wait on this */
  34 };
  35
  36 struct ldlm_export_data {
  37         struct list_head       led_held_locks; /* protected by led_lock below */
  38         spinlock_t             led_lock;
  39 };
  40
  41 struct ec_export_data { /* echo client */
  42         struct list_head eced_locks;
  43 };
  44
  45 /* In-memory access to client data from OST struct */
  46 struct filter_client_data;
  47 struct filter_export_data {
  48         spinlock_t                 fed_lock;      /* protects fed_open_head */
  49         struct filter_client_data *fed_fcd;
  50         loff_t                     fed_lr_off;
  51         int                        fed_lr_idx;
  52         long                       fed_dirty;    /* in bytes */
  53         long                       fed_grant;    /* in bytes */
  54         struct list_head           fed_mod_list; /* files being modified */
  55         int                        fed_mod_count;/* items in fed_writing list */
  56         long                       fed_pending;  /* bytes just being written */
  57         struct brw_stats           fed_brw_stats;
  58 };
  59
  60 typedef struct nid_stat {
  61         lnet_nid_t               nid;
  62         struct list_head         nid_chain;
  63         struct obd_device       *nid_obd;
  64         struct proc_dir_entry   *nid_proc;
  65         struct lprocfs_stats    *nid_stats;
  66         struct brw_stats        *nid_brw_stats;
  67         int                      nid_exp_ref_count;
  68 }nid_stat_t;
  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 hlist_node         exp_uuid_hash; /* uuid-export hash*/
  77         struct hlist_node         exp_nid_hash; /* nid-export hash */
  78         /* exp_obd_chain_timed fo ping evictor, protected by obd_dev_lock */
  79         struct list_head          exp_obd_chain_timed;
  80         struct obd_device        *exp_obd;
  81         struct obd_import        *exp_imp_reverse; /* to make RPCs backwards */
  82         struct nid_stat          *exp_nid_stats;
  83         struct lprocfs_stats     *exp_ldlm_stats;
  84         struct ptlrpc_connection *exp_connection;
  85         __u32                     exp_conn_cnt;
  86         struct ldlm_export_data   exp_ldlm_data;
  87         struct list_head          exp_outstanding_replies;
  88         time_t                    exp_last_request_time;
  89         spinlock_t                exp_lock; /* protects flags int below */
  90         /* ^ protects exp_outstanding_replies too */
  91         __u64                     exp_connect_flags;
  92         int                       exp_flags;
  93         unsigned int              exp_failed:1,
  94                                   exp_disconnected:1,
  95                                   exp_connecting:1,
  96                                   exp_replay_needed:1,
  97                                   exp_need_sync:1, /* needs sync from connect */
  98                                   exp_libclient:1; /* liblustre client? */
  99         union {
 100                 struct mds_export_data    eu_mds_data;
 101                 struct filter_export_data eu_filter_data;
 102                 struct ec_export_data     eu_ec_data;
 103         } u;
 104 };
 105
 106 #define exp_mds_data    u.eu_mds_data
 107 #define exp_lov_data    u.eu_lov_data
 108 #define exp_filter_data u.eu_filter_data
 109 #define exp_ec_data     u.eu_ec_data
 110
 111 static inline int exp_connect_cancelset(struct obd_export *exp)
 112 {
 113         return exp ? !!(exp->exp_connect_flags & OBD_CONNECT_CANCELSET) : 0;
 114 }
 115
 116 static inline int exp_connect_lru_resize(struct obd_export *exp)
 117 {
 118         LASSERT(exp != NULL);
 119         return !!(exp->exp_connect_flags & OBD_CONNECT_LRU_RESIZE);
 120 }
 121
 122 static inline int imp_connect_lru_resize(struct obd_import *imp)
 123 {
 124         struct obd_connect_data *ocd;
 125
 126         LASSERT(imp != NULL);
 127         ocd = &imp->imp_connect_data;
 128         return !!(ocd->ocd_connect_flags & OBD_CONNECT_LRU_RESIZE);
 129 }
 130
 131 struct exp_uuid_cb_data {
 132         char                   *page;
 133         int                     count;
 134         int                    *eof;
 135         int                    *len;
 136         struct obd_export      *exp;
 137 };
 138
 139 extern struct obd_export *class_conn2export(struct lustre_handle *conn);
 140 extern struct obd_device *class_conn2obd(struct lustre_handle *conn);
 141 typedef void (*hash_item_iterate_cb) (void *);
 142
 143 #endif /* __EXPORT_H */