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
  12 /* Adaptive Timeout stuff */
  13 #define D_ADAPTTO D_OTHER
  14 #define AT_BINS 4                  /* "bin" means "N seconds of history" */
  15 #define AT_TIMEBASE_DEFAULT 600    /* remembered history (sec) (should be
  16                                       evenly divisible by AT_BINS) */
  17 #define AT_FLG_NOHIST 0x1          /* use last reported value only */
  18 #define AT_FLG_MIN    0x2          /* use a minimum limit */
  19
  20 struct adaptive_timeout {
  21         time_t       at_binstart;         /* bin start time */
  22         time_t       at_binlimit;         /* bin time limit */
  23         unsigned int at_hist[AT_BINS];    /* timeout history bins */
  24         unsigned int at_flags;
  25         unsigned int at_current;          /* current timeout value */
  26         unsigned int at_worst_ever;       /* worst-ever timeout value */
  27         time_t       at_worst_time;       /* worst-ever timeout timestamp */
  28         spinlock_t   at_lock;
  29 };
  30
  31 enum lustre_imp_state {
  32         LUSTRE_IMP_CLOSED     = 1,
  33         LUSTRE_IMP_NEW        = 2,
  34         LUSTRE_IMP_DISCON     = 3,
  35         LUSTRE_IMP_CONNECTING = 4,
  36         LUSTRE_IMP_REPLAY     = 5,
  37         LUSTRE_IMP_REPLAY_LOCKS = 6,
  38         LUSTRE_IMP_REPLAY_WAIT  = 7,
  39         LUSTRE_IMP_RECOVER    = 8,
  40         LUSTRE_IMP_FULL       = 9,
  41         LUSTRE_IMP_EVICTED    = 10,
  42 };
  43
  44 static inline char * ptlrpc_import_state_name(enum lustre_imp_state state)
  45 {
  46         static char* import_state_names[] = {
  47                 "<UNKNOWN>", "CLOSED",  "NEW", "DISCONN",
  48                 "CONNECTING", "REPLAY", "REPLAY_LOCKS", "REPLAY_WAIT",
  49                 "RECOVER", "FULL", "EVICTED",
  50         };
  51
  52         LASSERT (state <= LUSTRE_IMP_EVICTED);
  53         return import_state_names[state];
  54 }
  55
  56 enum obd_import_event {
  57         IMP_EVENT_DISCON     = 0x808001,
  58         IMP_EVENT_INACTIVE   = 0x808002,
  59         IMP_EVENT_INVALIDATE = 0x808003,
  60         IMP_EVENT_ACTIVE     = 0x808004,
  61         IMP_EVENT_OCD        = 0x808005,
  62 };
  63
  64 struct obd_import_conn {
  65         struct list_head          oic_item;
  66         struct ptlrpc_connection *oic_conn;
  67         struct obd_uuid           oic_uuid;
  68         __u64                     oic_last_attempt; /* jiffies, 64-bit */
  69 };
  70
  71 #define IMP_AT_MAX_PORTALS 4
  72 struct imp_at {
  73         int                     iat_portal[IMP_AT_MAX_PORTALS];
  74         struct adaptive_timeout iat_net_latency;
  75         struct adaptive_timeout iat_service_estimate[IMP_AT_MAX_PORTALS];
  76         time_t                  iat_drain; /* hack to slow reconnect reqs */
  77 };
  78
  79 struct obd_import {
  80         struct portals_handle     imp_handle;
  81         atomic_t                  imp_refcount;
  82         struct lustre_handle      imp_dlm_handle; /* client's ldlm export */
  83         struct ptlrpc_connection *imp_connection;
  84         struct ptlrpc_client     *imp_client;
  85         struct list_head          imp_pinger_chain;
  86         struct list_head          imp_zombie_chain; /* queue for destruction */
  87
  88         /* Lists of requests that are retained for replay, waiting for a reply,
  89          * or waiting for recovery to complete, respectively.
  90          */
  91         struct list_head          imp_replay_list;
  92         struct list_head          imp_sending_list;
  93         struct list_head          imp_delayed_list;
  94
  95         struct obd_device        *imp_obd;
  96         cfs_waitq_t               imp_recovery_waitq;
  97
  98         atomic_t                  imp_inflight;
  99         atomic_t                  imp_replay_inflight;
 100         atomic_t                  imp_inval_count;
 101         enum lustre_imp_state     imp_state;
 102         int                       imp_generation;
 103         __u32                     imp_conn_cnt;
 104         int                       imp_last_generation_checked;
 105         __u64                     imp_last_replay_transno;
 106         __u64                     imp_peer_committed_transno;
 107         __u64                     imp_last_transno_checked;
 108         struct lustre_handle      imp_remote_handle;
 109         cfs_time_t                imp_next_ping;   /* jiffies */
 110         __u64                     imp_last_success_conn;   /* jiffies, 64-bit */
 111
 112         /* all available obd_import_conn linked here */
 113         struct list_head          imp_conn_list;
 114         struct obd_import_conn   *imp_conn_current;
 115
 116         /* Protects flags, level, generation, conn_cnt, *_list */
 117         spinlock_t                imp_lock;
 118
 119         /* flags */
 120         unsigned int              imp_invalid:1,          /* evicted */
 121                                   imp_deactive:1,         /* administratively disabled */
 122                                   imp_replayable:1,       /* try to recover the import */
 123                                   imp_dlm_fake:1,         /* don't run recovery (timeout instead) */
 124                                   imp_server_timeout:1,   /* use 1/2 timeout on MDS' OSCs */
 125                                   imp_initial_recov:1,    /* retry the initial connection */
 126                                   imp_initial_recov_bk:1, /* turn off init_recov after trying all failover nids */
 127                                   imp_force_verify:1,     /* force an immidiate ping */
 128                                   imp_pingable:1,         /* pingable */
 129                                   imp_resend_replay:1,    /* resend for replay */
 130                                   imp_recon_bk:1,         /* turn off reconnect if all failovers fail */
 131                                   imp_last_recon:1;       /* internally used by above */
 132         __u32                     imp_connect_op;
 133         struct obd_connect_data   imp_connect_data;
 134         __u64                     imp_connect_flags_orig;
 135
 136         __u32                     imp_msg_magic;
 137         __u32                     imp_msg_flags;          /* adjusted based on server capability */
 138
 139         struct ptlrpc_request_pool *imp_rq_pool;          /* emergency request pool */
 140
 141         struct imp_at             imp_at;                 /* adaptive timeout data */
 142         time_t                    imp_last_reply_time;    /* for health check */
 143 };
 144
 145 /* import.c */
 146 static inline void at_init(struct adaptive_timeout *at, int val, int timebase,
 147                            int flags) {
 148         memset(at, 0, sizeof(*at));
 149         at->at_binlimit = timebase / AT_BINS;
 150         at->at_current = val;
 151         at->at_worst_ever = val;
 152         at->at_worst_time = cfs_time_current_sec();
 153         at->at_flags = flags;
 154         spin_lock_init(&at->at_lock);
 155 }
 156 static inline int at_get(struct adaptive_timeout *at) {
 157         extern unsigned int adaptive_timeout_max;
 158         if (adaptive_timeout_max)
 159                 return min(at->at_current, adaptive_timeout_max);
 160         return at->at_current;
 161 }
 162 void at_add(struct adaptive_timeout *at, unsigned int val);
 163 int import_at_get_index(struct obd_import *imp, int portal);
 164 int import_at_get_ldlm(struct obd_import *imp);
 165 #define AT_OFF (adaptive_timeout_max == 0)
 166
 167 /* genops.c */
 168 struct obd_export;
 169 extern struct obd_import *class_exp2cliimp(struct obd_export *);
 170 extern struct obd_import *class_conn2cliimp(struct lustre_handle *);
 171
 172 #endif /* __IMPORT_H */