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
   5 #ifndef __IMPORT_H
   6 #define __IMPORT_H
   7
   8 #include <linux/lustre_handles.h>
   9 #include <linux/lustre_idl.h>
  10
  11 enum lustre_imp_state {
  12         LUSTRE_IMP_CLOSED     = 1,
  13         LUSTRE_IMP_NEW        = 2,
  14         LUSTRE_IMP_DISCON     = 3,
  15         LUSTRE_IMP_CONNECTING = 4,
  16         LUSTRE_IMP_REPLAY     = 5,
  17         LUSTRE_IMP_REPLAY_LOCKS = 6,
  18         LUSTRE_IMP_REPLAY_WAIT  = 7,
  19         LUSTRE_IMP_RECOVER    = 8,
  20         LUSTRE_IMP_FULL       = 9,
  21         LUSTRE_IMP_EVICTED    = 10,
  22 };
  23
  24 static inline char * ptlrpc_import_state_name(enum lustre_imp_state state)
  25 {
  26         static char* import_state_names[] = {
  27                 "<UNKNOWN>", "CLOSED",  "NEW", "DISCONN",
  28                 "CONNECTING", "REPLAY", "REPLAY_LOCKS", "REPLAY_WAIT",
  29                 "RECOVER", "FULL", "EVICTED",
  30         };
  31
  32         LASSERT (state <= LUSTRE_IMP_EVICTED);
  33         return import_state_names[state];
  34 }
  35
  36 enum obd_import_event {
  37         IMP_EVENT_DISCON     = 0x808001,
  38         IMP_EVENT_INACTIVE   = 0x808002,
  39         IMP_EVENT_INVALIDATE = 0x808003,
  40         IMP_EVENT_ACTIVE     = 0x808004,
  41         IMP_EVENT_OCD        = 0x808005,
  42 };
  43
  44 struct obd_import_conn {
  45         struct list_head          oic_item;
  46         struct ptlrpc_connection *oic_conn;
  47         struct obd_uuid           oic_uuid;
  48         unsigned long             oic_last_attempt; /* in jiffies */
  49 };
  50
  51 struct obd_import {
  52         struct portals_handle     imp_handle;
  53         atomic_t                  imp_refcount;
  54         struct lustre_handle      imp_dlm_handle; /* client's ldlm export */
  55         struct ptlrpc_connection *imp_connection;
  56         struct ptlrpc_client     *imp_client;
  57         struct list_head          imp_pinger_chain;
  58
  59         /* Lists of requests that are retained for replay, waiting for a reply,
  60          * or waiting for recovery to complete, respectively.
  61          */
  62         struct list_head          imp_replay_list;
  63         struct list_head          imp_sending_list;
  64         struct list_head          imp_delayed_list;
  65
  66         struct obd_device        *imp_obd;
  67         wait_queue_head_t         imp_recovery_waitq;
  68         __u64                     imp_last_replay_transno;
  69         atomic_t                  imp_inflight;
  70         atomic_t                  imp_replay_inflight;
  71         enum lustre_imp_state     imp_state;
  72         int                       imp_generation;
  73         __u32                     imp_conn_cnt;
  74         __u64                     imp_max_transno;
  75         __u64                     imp_peer_committed_transno;
  76         struct obd_uuid           imp_target_uuid; /* XXX -> lustre_name */
  77         struct lustre_handle      imp_remote_handle;
  78         unsigned long             imp_next_ping;   /* jiffies */
  79
  80         /* all available obd_import_conn linked here */
  81         struct list_head          imp_conn_list;
  82         struct obd_import_conn   *imp_conn_current;
  83
  84         /* Protects flags, level, generation, conn_cnt, *_list */
  85         spinlock_t                imp_lock;
  86
  87         /* flags */
  88         unsigned int              imp_invalid:1, imp_replayable:1,
  89                                   imp_dlm_fake:1, imp_server_timeout:1,
  90                                   imp_initial_recov:1, imp_initial_recov_bk:1,
  91                                   imp_force_verify:1, imp_pingable:1,
  92                                   imp_resend_replay:1, imp_deactive:1;
  93         __u32                     imp_connect_op;
  94         struct obd_connect_data   imp_connect_data;
  95         __u64                     imp_connect_flags_orig;
  96 };
  97
  98 typedef void (*obd_import_callback)(struct obd_import *imp, void *closure,
  99                                     int event, void *event_arg, void *cb_data);
 100
 101 struct obd_import_observer {
 102         struct list_head     oio_chain;
 103         obd_import_callback  oio_cb;
 104         void                *oio_cb_data;
 105 };
 106
 107 void class_observe_import(struct obd_import *imp, obd_import_callback cb,
 108                           void *cb_data);
 109 void class_unobserve_import(struct obd_import *imp, obd_import_callback cb,
 110                             void *cb_data);
 111 void class_notify_import_observers(struct obd_import *imp, int event,
 112                                    void *event_arg);
 113
 114 /* genops.c */
 115 struct obd_export;
 116 extern struct obd_import *class_exp2cliimp(struct obd_export *);
 117 extern struct obd_import *class_conn2cliimp(struct lustre_handle *);
 118
 119 #endif /* __IMPORT_H */