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  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #ifndef __EXPORT_H
  38 #define __EXPORT_H
  39
  40 #include <lustre/lustre_idl.h>
  41 #include <lustre_dlm.h>
  42 #include <lprocfs_status.h>
  43 #include <class_hash.h>
  44
  45 /* Data stored per client in the last_rcvd file.  In le32 order. */
  46 struct mds_client_data;
  47 struct mdt_client_data;
  48 struct mds_idmap_table;
  49 struct mdt_idmap_table;
  50
  51 struct mdt_export_data {
  52         struct list_head        med_open_head;
  53         spinlock_t              med_open_lock; /* lock med_open_head, mfd_list*/
  54         struct semaphore        med_lcd_lock;
  55         struct lsd_client_data *med_lcd;
  56         __u64                   med_ibits_known;
  57         loff_t                  med_lr_off;
  58         int                     med_lr_idx;
  59         struct semaphore           med_idmap_sem;
  60         struct lustre_idmap_table *med_idmap;
  61 };
  62
  63 struct osc_creator {
  64         spinlock_t              oscc_lock;
  65         struct list_head        oscc_list;
  66         struct obd_device       *oscc_obd;
  67         obd_id                  oscc_last_id;//last available pre-created object
  68         obd_id                  oscc_next_id;// what object id to give out next
  69         int                     oscc_grow_count;
  70         /**
  71          * Limit oscc_grow_count value, can be changed via proc fs
  72          */
  73         int                     oscc_max_grow_count;
  74         struct obdo             oscc_oa;
  75         int                     oscc_flags;
  76         cfs_waitq_t             oscc_waitq; /* creating procs wait on this */
  77 };
  78
  79 struct ec_export_data { /* echo client */
  80         struct list_head eced_locks;
  81 };
  82
  83 /* In-memory access to client data from OST struct */
  84 struct filter_export_data {
  85         spinlock_t                 fed_lock;      /* protects fed_open_head */
  86         struct lsd_client_data    *fed_lcd;
  87         loff_t                     fed_lr_off;
  88         int                        fed_lr_idx;
  89         long                       fed_dirty;    /* in bytes */
  90         long                       fed_grant;    /* in bytes */
  91         struct list_head           fed_mod_list; /* files being modified */
  92         int                        fed_mod_count;/* items in fed_writing list */
  93         long                       fed_pending;  /* bytes just being written */
  94         __u32                      fed_group;
  95 };
  96
  97 typedef struct nid_stat_uuid {
  98         struct list_head ns_uuid_list;
  99         struct obd_uuid  ns_uuid;
 100 } nid_stat_uuid_t;
 101
 102 typedef struct nid_stat {
 103         lnet_nid_t               nid;
 104         struct hlist_node        nid_hash;
 105         struct list_head         nid_list;
 106         struct list_head         nid_uuid_list;
 107         struct obd_device       *nid_obd;
 108         struct proc_dir_entry   *nid_proc;
 109         struct lprocfs_stats    *nid_stats;
 110         struct lprocfs_stats    *nid_ldlm_stats;
 111         struct brw_stats        *nid_brw_stats;
 112         int                      nid_exp_ref_count;
 113 }nid_stat_t;
 114
 115 enum obd_option {
 116         OBD_OPT_FORCE =         0x0001,
 117         OBD_OPT_FAILOVER =      0x0002,
 118         OBD_OPT_ABORT_RECOV =   0x0004,
 119 };
 120
 121 struct obd_export {
 122         struct portals_handle     exp_handle;
 123         atomic_t                  exp_refcount;
 124         atomic_t                  exp_rpc_count;
 125         struct obd_uuid           exp_client_uuid;
 126         struct list_head          exp_obd_chain;
 127         struct hlist_node         exp_uuid_hash; /* uuid-export hash*/
 128         struct hlist_node         exp_nid_hash; /* nid-export hash */
 129         /* exp_obd_chain_timed fo ping evictor, protected by obd_dev_lock */
 130         struct list_head          exp_obd_chain_timed;
 131         struct obd_device        *exp_obd;
 132         struct obd_import        *exp_imp_reverse; /* to make RPCs backwards */
 133         struct nid_stat          *exp_nid_stats;
 134         struct lprocfs_stats     *exp_md_stats;
 135         struct ptlrpc_connection *exp_connection;
 136         __u32                     exp_conn_cnt;
 137         lustre_hash_t            *exp_lock_hash; /* existing lock hash */
 138         spinlock_t                exp_lock_hash_lock;
 139         struct list_head          exp_outstanding_replies;
 140         time_t                    exp_last_request_time;
 141         struct list_head          exp_req_replay_queue;
 142         spinlock_t                exp_lock; /* protects flags int below */
 143         /* ^ protects exp_outstanding_replies too */
 144         __u64                     exp_connect_flags;
 145         enum obd_option           exp_flags;
 146         unsigned long             exp_failed:1,
 147                                   exp_in_recovery:1,
 148                                   exp_disconnected:1,
 149                                   exp_connecting:1,
 150                                   exp_req_replay_needed:1,
 151                                   exp_lock_replay_needed:1,
 152                                   exp_need_sync:1,
 153                                   exp_flvr_changed:1,
 154                                   exp_flvr_adapt:1,
 155                                   exp_libclient:1; /* liblustre client? */
 156         struct list_head          exp_queued_rpc;  /* RPC to be handled */
 157         /* also protected by exp_lock */
 158         enum lustre_sec_part      exp_sp_peer;
 159         struct sptlrpc_flavor     exp_flvr;             /* current */
 160         struct sptlrpc_flavor     exp_flvr_old[2];      /* about-to-expire */
 161         cfs_time_t                exp_flvr_expire[2];   /* seconds */
 162
 163         union {
 164                 struct mdt_export_data    eu_mdt_data;
 165                 struct filter_export_data eu_filter_data;
 166                 struct ec_export_data     eu_ec_data;
 167         } u;
 168 };
 169
 170 #define exp_mdt_data    u.eu_mdt_data
 171 #define exp_filter_data u.eu_filter_data
 172 #define exp_ec_data     u.eu_ec_data
 173
 174 static inline int exp_connect_cancelset(struct obd_export *exp)
 175 {
 176         LASSERT(exp != NULL);
 177         return !!(exp->exp_connect_flags & OBD_CONNECT_CANCELSET);
 178 }
 179
 180 static inline int exp_connect_lru_resize(struct obd_export *exp)
 181 {
 182         LASSERT(exp != NULL);
 183         return !!(exp->exp_connect_flags & OBD_CONNECT_LRU_RESIZE);
 184 }
 185
 186 static inline int exp_connect_rmtclient(struct obd_export *exp)
 187 {
 188         LASSERT(exp != NULL);
 189         return !!(exp->exp_connect_flags & OBD_CONNECT_RMT_CLIENT);
 190 }
 191
 192 static inline int client_is_remote(struct obd_export *exp)
 193 {
 194         struct obd_import *imp = class_exp2cliimp(exp);
 195
 196         return !!(imp->imp_connect_data.ocd_connect_flags &
 197                   OBD_CONNECT_RMT_CLIENT);
 198 }
 199
 200 static inline int imp_connect_lru_resize(struct obd_import *imp)
 201 {
 202         struct obd_connect_data *ocd;
 203
 204         LASSERT(imp != NULL);
 205         ocd = &imp->imp_connect_data;
 206         return !!(ocd->ocd_connect_flags & OBD_CONNECT_LRU_RESIZE);
 207 }
 208
 209 extern struct obd_export *class_conn2export(struct lustre_handle *conn);
 210 extern struct obd_device *class_conn2obd(struct lustre_handle *conn);
 211
 212 #endif /* __EXPORT_H */