lustre/include/linux/lustre_import.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 __IMPORT_H
  11 #define __IMPORT_H
  12
  13 #include <linux/lustre_handles.h>
  14 #include <linux/lustre_idl.h>
  15
  16 enum lustre_imp_state {
  17         LUSTRE_IMP_CLOSED     = 1,
  18         LUSTRE_IMP_NEW        = 2,
  19         LUSTRE_IMP_DISCON     = 3,
  20         LUSTRE_IMP_CONNECTING = 4,
  21         LUSTRE_IMP_REPLAY     = 5,
  22         LUSTRE_IMP_REPLAY_LOCKS = 6,
  23         LUSTRE_IMP_REPLAY_WAIT  = 7,
  24         LUSTRE_IMP_RECOVER    = 8,
  25         LUSTRE_IMP_FULL       = 9,
  26         LUSTRE_IMP_EVICTED    = 10,
  27 };
  28
  29 static inline char * ptlrpc_import_state_name(enum lustre_imp_state state)
  30 {
  31
  32         static char* import_state_names[] = {
  33                 "<UNKNOWN>", "CLOSED",  "NEW", "DISCONN",
  34                 "CONNECTING", "REPLAY", "REPLAY_LOCKS", "REPLAY_WAIT",
  35                 "RECOVER", "FULL", "EVICTED",
  36         };
  37
  38         LASSERT (state <= LUSTRE_IMP_EVICTED);
  39         return import_state_names[state];
  40 }
  41
  42 enum obd_import_event {
  43         IMP_EVENT_DISCON     = 0x808001,
  44         IMP_EVENT_INACTIVE   = 0x808002,
  45         IMP_EVENT_INVALIDATE = 0x808003,
  46         IMP_EVENT_ACTIVE     = 0x808004,
  47 };
  48
  49 struct ptlrpc_sec;
  50
  51 struct obd_import_conn {
  52         struct list_head          oic_item;
  53         struct ptlrpc_connection *oic_conn;
  54         struct obd_uuid           oic_uuid;
  55         unsigned long             oic_last_attempt; /* in jiffies */
  56 };
  57
  58 struct obd_import {
  59         struct portals_handle     imp_handle;
  60         atomic_t                  imp_refcount;
  61         struct lustre_handle      imp_dlm_handle; /* client's ldlm export */
  62         struct ptlrpc_connection *imp_connection;
  63         struct ptlrpc_client     *imp_client;
  64         struct list_head          imp_observers;
  65         struct list_head          imp_pinger_chain;
  66
  67         /* Lists of requests that are retained for replay, waiting for a reply,
  68          * or waiting for recovery to complete, respectively.
  69          */
  70         struct list_head          imp_replay_list;
  71         struct list_head          imp_sending_list;
  72         struct list_head          imp_delayed_list;
  73
  74         /* list of ongoing raw rpcs (only used by gss) */
  75         struct list_head          imp_rawrpc_list;
  76
  77         struct obd_device        *imp_obd;
  78         struct ptlrpc_sec        *imp_sec;
  79         wait_queue_head_t         imp_recovery_waitq;
  80         __u64                     imp_last_replay_transno;
  81         atomic_t                  imp_inflight;
  82         atomic_t                  imp_replay_inflight;
  83         enum lustre_imp_state     imp_state;
  84         int                       imp_generation;
  85         __u32                     imp_conn_cnt;
  86         __u64                     imp_max_transno;
  87         __u64                     imp_peer_committed_transno;
  88         struct obd_uuid           imp_target_uuid; /* XXX -> lustre_name */
  89         struct lustre_handle      imp_remote_handle;
  90         unsigned long             imp_next_ping;
  91         unsigned long             imp_connect_start;
  92
  93         /* all available obd_import_conn linked here */
  94         struct list_head          imp_conn_list;
  95         struct obd_import_conn   *imp_conn_current;
  96
  97         /* Protects flags, level, generation, conn_cnt, *_list */
  98         spinlock_t                imp_lock;
  99
 100         /* flags */
 101         int                       imp_invalid:1, imp_replayable:1,
 102                                   imp_dlm_fake:1, imp_server_timeout:1,
 103                                   imp_initial_recov:1, imp_force_verify:1,
 104                                   imp_pingable:1, imp_resend_replay:1;
 105         __u32                     imp_connect_op;
 106         __u32                     imp_connect_flags;
 107 };
 108
 109 typedef void (*obd_import_callback)(struct obd_import *imp, void *closure,
 110                                     int event, void *event_arg, void *cb_data);
 111
 112 struct obd_import_observer {
 113         struct list_head     oio_chain;
 114         obd_import_callback  oio_cb;
 115         void                *oio_cb_data;
 116 };
 117
 118 void class_observe_import(struct obd_import *imp, obd_import_callback cb,
 119                           void *cb_data);
 120 void class_unobserve_import(struct obd_import *imp, obd_import_callback cb,
 121                             void *cb_data);
 122 void class_notify_import_observers(struct obd_import *imp, int event,
 123                                    void *event_arg);
 124
 125 #define IMP_EVENT_ACTIVE   1
 126 #define IMP_EVENT_INACTIVE 2
 127
 128 /* genops.c */
 129 struct obd_export;
 130 extern struct obd_import *class_exp2cliimp(struct obd_export *);
 131 extern struct obd_import *class_conn2cliimp(struct lustre_handle *);
 132
 133 #endif /* __IMPORT_H */