lustre/ptlrpc/rpc.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2002 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22
  23 #define EXPORT_SYMTAB
  24 #define DEBUG_SUBSYSTEM S_RPC
  25
  26 #include <linux/module.h>
  27 #include <linux/lustre_ha.h>
  28
  29 extern int ptlrpc_init_portals(void);
  30 extern void ptlrpc_exit_portals(void);
  31
  32 int connmgr_setup(struct obd_device *obddev, obd_count len, void *buf)
  33 {
  34         struct recovd_obd *recovd = &obddev->u.recovd;
  35         int err;
  36         ENTRY;
  37
  38         memset(recovd, 0, sizeof(*recovd));
  39
  40         OBD_ALLOC(recovd->recovd_client, sizeof(*recovd->recovd_client));
  41         if (!recovd)
  42                 RETURN(-ENOMEM);
  43
  44         err = recovd_setup(recovd);
  45         if (err)
  46                 GOTO(err_free, err);
  47
  48         recovd->recovd_service =
  49                 ptlrpc_init_svc(128 * 1024,CONNMGR_REQUEST_PORTAL,
  50                                 CONNMGR_REPLY_PORTAL, "self", connmgr_handle);
  51         if (!recovd->recovd_service) {
  52                 CERROR("failed to start service\n");
  53                 GOTO(err_recovd, err = -EINVAL);
  54         }
  55
  56         ptlrpc_init_client(NULL, NULL, CONNMGR_REQUEST_PORTAL,
  57                            CONNMGR_REPLY_PORTAL, recovd->recovd_client);
  58         recovd->recovd_client->cli_name = "connmgr";
  59
  60         err = ptlrpc_start_thread(obddev, recovd->recovd_service, "lustre_connmgr");
  61         if (err) {
  62                 CERROR("cannot start thread\n");
  63                 GOTO(err_svc, err);
  64         }
  65
  66         MOD_INC_USE_COUNT;
  67         ptlrpc_connmgr = recovd;
  68         RETURN(0);
  69
  70  err_svc:
  71         rpc_unregister_service(recovd->recovd_service);
  72  err_recovd:
  73         recovd_cleanup(recovd);
  74  err_free:
  75         if (recovd->recovd_client)
  76                 OBD_FREE(recovd->recovd_client, sizeof(*recovd->recovd_client));
  77         RETURN(err);
  78 }
  79
  80 int connmgr_cleanup(struct obd_device *dev)
  81 {
  82         struct recovd_obd *recovd = &dev->u.recovd;
  83         int err;
  84
  85         err = recovd_cleanup(recovd);
  86         if (err)
  87                 LBUG();
  88
  89         ptlrpc_stop_all_threads(recovd->recovd_service);
  90         rpc_unregister_service(recovd->recovd_service);
  91         if (!list_empty(&recovd->recovd_service->srv_reqs)) {
  92                 // XXX reply with errors and clean up
  93                 CERROR("Request list not empty!\n");
  94         }
  95
  96         OBD_FREE(recovd->recovd_service, sizeof(*recovd->recovd_service));
  97         ptlrpc_cleanup_client(recovd->recovd_client);
  98         OBD_FREE(recovd->recovd_client, sizeof(*recovd->recovd_client));
  99         MOD_DEC_USE_COUNT;
 100         RETURN(0);
 101 }
 102
 103
 104 int connmgr_iocontrol(long cmd, struct obd_conn *conn, int len, void *karg,
 105                       void *uarg)
 106 {
 107         struct recovd_obd *recovd = &conn->oc_dev->u.recovd;
 108
 109         ENTRY;
 110         if (cmd == OBD_RECOVD_NEWCONN) {
 111                 spin_lock(&recovd->recovd_lock);
 112                 recovd->recovd_flags |= RECOVD_UPCALL_ANSWER;
 113                 recovd->recovd_wakeup_flag = 1;
 114                 wake_up(&recovd->recovd_waitq);
 115                 spin_unlock(&recovd->recovd_lock);
 116                 EXIT;
 117         }
 118         return 0;
 119 }
 120
 121
 122 /* use obd ops to offer management infrastructure */
 123 static struct obd_ops recovd_obd_ops = {
 124         o_setup:       connmgr_setup,
 125         o_cleanup:     connmgr_cleanup,
 126         o_iocontrol:     connmgr_iocontrol,
 127 };
 128
 129 static int __init ptlrpc_init(void)
 130 {
 131         int rc;
 132         rc = ptlrpc_init_portals();
 133         if (rc)
 134                 RETURN(rc);
 135         ptlrpc_init_connection();
 136         obd_register_type(&recovd_obd_ops, LUSTRE_HA_NAME);
 137         return 0;
 138 }
 139
 140 static void __exit ptlrpc_exit(void)
 141 {
 142         obd_unregister_type(LUSTRE_HA_NAME);
 143         ptlrpc_exit_portals();
 144         ptlrpc_cleanup_connection();
 145 }
 146
 147 /* connection.c */
 148 EXPORT_SYMBOL(ptlrpc_readdress_connection);
 149 EXPORT_SYMBOL(ptlrpc_get_connection);
 150 EXPORT_SYMBOL(ptlrpc_put_connection);
 151 EXPORT_SYMBOL(ptlrpc_connection_addref);
 152 EXPORT_SYMBOL(ptlrpc_init_connection);
 153 EXPORT_SYMBOL(ptlrpc_cleanup_connection);
 154
 155 /* niobuf.c */
 156 EXPORT_SYMBOL(ptlrpc_send_bulk);
 157 EXPORT_SYMBOL(ptlrpc_register_bulk);
 158 EXPORT_SYMBOL(ptlrpc_abort_bulk);
 159 EXPORT_SYMBOL(ptlrpc_reply);
 160 EXPORT_SYMBOL(ptlrpc_error);
 161 EXPORT_SYMBOL(ptlrpc_resend_req);
 162 EXPORT_SYMBOL(ptl_send_rpc);
 163 EXPORT_SYMBOL(ptlrpc_link_svc_me);
 164
 165 /* client.c */
 166 EXPORT_SYMBOL(ptlrpc_init_client);
 167 EXPORT_SYMBOL(ptlrpc_cleanup_client);
 168 EXPORT_SYMBOL(ptlrpc_req_to_uuid);
 169 EXPORT_SYMBOL(ptlrpc_uuid_to_connection);
 170 EXPORT_SYMBOL(ptlrpc_queue_wait);
 171 EXPORT_SYMBOL(ptlrpc_continue_req);
 172 EXPORT_SYMBOL(ptlrpc_replay_req);
 173 EXPORT_SYMBOL(ptlrpc_restart_req);
 174 EXPORT_SYMBOL(ptlrpc_prep_req);
 175 EXPORT_SYMBOL(ptlrpc_free_req);
 176 EXPORT_SYMBOL(ptlrpc_req_finished);
 177 EXPORT_SYMBOL(ptlrpc_prep_bulk);
 178 EXPORT_SYMBOL(ptlrpc_free_bulk);
 179 EXPORT_SYMBOL(ptlrpc_prep_bulk_page);
 180 EXPORT_SYMBOL(ptlrpc_free_bulk_page);
 181 EXPORT_SYMBOL(ptlrpc_check_status);
 182
 183 /* service.c */
 184 EXPORT_SYMBOL(ptlrpc_init_svc);
 185 EXPORT_SYMBOL(ptlrpc_stop_all_threads);
 186 EXPORT_SYMBOL(ptlrpc_start_thread);
 187 EXPORT_SYMBOL(rpc_unregister_service);
 188
 189 /* pack_generic.c */
 190 EXPORT_SYMBOL(lustre_pack_msg);
 191 EXPORT_SYMBOL(lustre_msg_size);
 192 EXPORT_SYMBOL(lustre_unpack_msg);
 193 EXPORT_SYMBOL(lustre_msg_buf);
 194
 195 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
 196 MODULE_DESCRIPTION("Lustre Request Processor v1.0");
 197 MODULE_LICENSE("GPL");
 198
 199 module_init(ptlrpc_init);
 200 module_exit(ptlrpc_exit);