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         unsigned int            med_rmtclient:1; /* remote client? */
  60         struct semaphore           med_idmap_sem;
  61         struct lustre_idmap_table *med_idmap;
  62 };
  63
  64 struct osc_creator {
  65         spinlock_t              oscc_lock;
  66         struct list_head        oscc_list;
  67         struct obd_device       *oscc_obd;
  68         obd_id                  oscc_last_id;//last available pre-created object
  69         obd_id                  oscc_next_id;// what object id to give out next
  70         int                     oscc_grow_count;
  71         /**
  72          * Limit oscc_grow_count value, can be changed via proc fs
  73          */
  74         int                     oscc_max_grow_count;
  75         struct obdo             oscc_oa;
  76         int                     oscc_flags;
  77         cfs_waitq_t             oscc_waitq; /* creating procs wait on this */
  78 };
  79
  80 struct ec_export_data { /* echo client */
  81         struct list_head eced_locks;
  82 };
  83
  84 /* In-memory access to client data from OST struct */
  85 struct filter_export_data {
  86         spinlock_t                 fed_lock;      /* protects fed_open_head */
  87         struct lsd_client_data    *fed_lcd;
  88         loff_t                     fed_lr_off;
  89         int                        fed_lr_idx;
  90         long                       fed_dirty;    /* in bytes */
  91         long                       fed_grant;    /* in bytes */
  92         struct list_head           fed_mod_list; /* files being modified */
  93         int                        fed_mod_count;/* items in fed_writing list */
  94         long                       fed_pending;  /* bytes just being written */
  95         __u32                      fed_group;
  96         struct brw_stats           fed_brw_stats;
  97 };
  98
  99 typedef struct nid_stat {
 100         lnet_nid_t               nid;
 101         struct hlist_node        nid_hash;
 102         struct list_head         nid_list;
 103         struct obd_device       *nid_obd;
 104         struct proc_dir_entry   *nid_proc;
 105         struct lprocfs_stats    *nid_stats;
 106         struct brw_stats        *nid_brw_stats;
 107         int                      nid_exp_ref_count;
 108 }nid_stat_t;
 109
 110 struct obd_export {
 111         struct portals_handle     exp_handle;
 112         atomic_t                  exp_refcount;
 113         atomic_t                  exp_rpc_count;
 114         struct obd_uuid           exp_client_uuid;
 115         struct list_head          exp_obd_chain;
 116         struct hlist_node         exp_uuid_hash; /* uuid-export hash*/
 117         struct hlist_node         exp_nid_hash; /* nid-export hash */
 118         /* exp_obd_chain_timed fo ping evictor, protected by obd_dev_lock */
 119         struct list_head          exp_obd_chain_timed;
 120         struct obd_device        *exp_obd;
 121         struct obd_import        *exp_imp_reverse; /* to make RPCs backwards */
 122         struct nid_stat          *exp_nid_stats;
 123         struct lprocfs_stats     *exp_md_stats;
 124         struct lprocfs_stats     *exp_ldlm_stats;
 125         struct ptlrpc_connection *exp_connection;
 126         __u32                     exp_conn_cnt;
 127         lustre_hash_t            *exp_lock_hash; /* existing lock hash */
 128         spinlock_t                exp_lock_hash_lock;
 129         struct list_head          exp_outstanding_replies;
 130         time_t                    exp_last_request_time;
 131         struct list_head          exp_req_replay_queue;
 132         spinlock_t                exp_lock; /* protects flags int below */
 133         /* ^ protects exp_outstanding_replies too */
 134         __u64                     exp_connect_flags;
 135         int                       exp_flags;
 136         unsigned long             exp_failed:1,
 137                                   exp_in_recovery:1,
 138                                   exp_disconnected:1,
 139                                   exp_connecting:1,
 140                                   exp_req_replay_needed:1,
 141                                   exp_lock_replay_needed:1,
 142                                   exp_need_sync:1,
 143                                   exp_flvr_changed:1,
 144                                   exp_flvr_adapt:1,
 145                                   exp_libclient:1; /* liblustre client? */
 146         /* also protected by exp_lock */
 147         enum lustre_sec_part      exp_sp_peer;
 148         struct sptlrpc_flavor     exp_flvr;             /* current */
 149         struct sptlrpc_flavor     exp_flvr_old[2];      /* about-to-expire */
 150         cfs_time_t                exp_flvr_expire[2];   /* seconds */
 151
 152         union {
 153                 struct mdt_export_data    eu_mdt_data;
 154                 struct filter_export_data eu_filter_data;
 155                 struct ec_export_data     eu_ec_data;
 156         } u;
 157 };
 158
 159 #define exp_mdt_data    u.eu_mdt_data
 160 #define exp_filter_data u.eu_filter_data
 161 #define exp_ec_data     u.eu_ec_data
 162
 163 static inline int exp_connect_cancelset(struct obd_export *exp)
 164 {
 165         LASSERT(exp != NULL);
 166         return !!(exp->exp_connect_flags & OBD_CONNECT_CANCELSET);
 167 }
 168
 169 static inline int exp_connect_lru_resize(struct obd_export *exp)
 170 {
 171         LASSERT(exp != NULL);
 172         return !!(exp->exp_connect_flags & OBD_CONNECT_LRU_RESIZE);
 173 }
 174
 175 static inline int imp_connect_lru_resize(struct obd_import *imp)
 176 {
 177         struct obd_connect_data *ocd;
 178
 179         LASSERT(imp != NULL);
 180         ocd = &imp->imp_connect_data;
 181         return !!(ocd->ocd_connect_flags & OBD_CONNECT_LRU_RESIZE);
 182 }
 183
 184 extern struct obd_export *class_conn2export(struct lustre_handle *conn);
 185 extern struct obd_device *class_conn2obd(struct lustre_handle *conn);
 186
 187 #endif /* __EXPORT_H */