lustre/include/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 <lustre_handles.h>
   9 #include <lustre/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         __u64                     oic_last_attempt; /* jiffies, 64-bit */
  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         struct list_head          imp_zombie_chain; /* queue for destruction */
  59
  60         /* Lists of requests that are retained for replay, waiting for a reply,
  61          * or waiting for recovery to complete, respectively.
  62          */
  63         struct list_head          imp_replay_list;
  64         struct list_head          imp_sending_list;
  65         struct list_head          imp_delayed_list;
  66
  67         struct obd_device        *imp_obd;
  68         cfs_waitq_t               imp_recovery_waitq;
  69
  70         atomic_t                  imp_inflight;
  71         atomic_t                  imp_replay_inflight;
  72         enum lustre_imp_state     imp_state;
  73         int                       imp_generation;
  74         __u32                     imp_conn_cnt;
  75         int                       imp_last_generation_checked;
  76         __u64                     imp_last_replay_transno;
  77         __u64                     imp_peer_committed_transno;
  78         __u64                     imp_last_transno_checked;
  79         struct lustre_handle      imp_remote_handle;
  80         cfs_time_t                imp_next_ping;   /* jiffies */
  81         __u64                     imp_last_success_conn;   /* jiffies, 64-bit */
  82
  83         /* all available obd_import_conn linked here */
  84         struct list_head          imp_conn_list;
  85         struct obd_import_conn   *imp_conn_current;
  86
  87         /* Protects flags, level, generation, conn_cnt, *_list */
  88         spinlock_t                imp_lock;
  89
  90         /* flags */
  91         unsigned int              imp_invalid:1,          /* evicted */
  92                                   imp_deactive:1,         /* administratively disabled */
  93                                   imp_replayable:1,       /* try to recover the import */
  94                                   imp_dlm_fake:1,         /* don't run recovery (timeout instead) */
  95                                   imp_server_timeout:1,   /* use 1/2 timeout on MDS' OSCs */
  96                                   imp_initial_recov:1,    /* retry the initial connection */
  97                                   imp_initial_recov_bk:1, /* turn off init_recov after trying all failover nids */
  98                                   imp_force_verify:1,     /* force an immidiate ping */
  99                                   imp_pingable:1,         /* pingable */
 100                                   imp_resend_replay:1,    /* resend for replay */
 101                                   imp_recon_bk:1,         /* turn off reconnect if all failovers fail */
 102                                   imp_last_recon:1;       /* internally used by above */
 103         __u32                     imp_connect_op;
 104         struct obd_connect_data   imp_connect_data;
 105         __u64                     imp_connect_flags_orig;
 106
 107         __u32                     imp_msg_magic;
 108
 109         struct ptlrpc_request_pool *imp_rq_pool; /* emergency request pool */
 110 };
 111
 112 typedef void (*obd_import_callback)(struct obd_import *imp, void *closure,
 113                                     int event, void *event_arg, void *cb_data);
 114
 115 struct obd_import_observer {
 116         struct list_head     oio_chain;
 117         obd_import_callback  oio_cb;
 118         void                *oio_cb_data;
 119 };
 120
 121 void class_observe_import(struct obd_import *imp, obd_import_callback cb,
 122                           void *cb_data);
 123 void class_unobserve_import(struct obd_import *imp, obd_import_callback cb,
 124                             void *cb_data);
 125 void class_notify_import_observers(struct obd_import *imp, int event,
 126                                    void *event_arg);
 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 */