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, 2003 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/obd_support.h>
  28 #include <linux/obd_class.h>
  29 #include <linux/lustre_lib.h>
  30 #include <linux/lustre_ha.h>
  31 #include <linux/lustre_net.h>
  32 #include <linux/init.h>
  33 #include <linux/lprocfs_status.h>
  34
  35 extern int ptlrpc_init_portals(void);
  36 extern void ptlrpc_exit_portals(void);
  37
  38
  39 int connmgr_setup(struct obd_device *obddev, obd_count len, void *buf)
  40 {
  41         struct recovd_obd *recovd = &obddev->u.recovd;
  42         int err;
  43         ENTRY;
  44
  45         memset(recovd, 0, sizeof(*recovd));
  46
  47         err = recovd_setup(recovd);
  48         RETURN(err);
  49 }
  50
  51 int connmgr_cleanup(struct obd_device *dev)
  52 {
  53         struct recovd_obd *recovd = &dev->u.recovd;
  54         int err;
  55
  56         err = recovd_cleanup(recovd);
  57         RETURN(err);
  58 }
  59
  60 int connmgr_iocontrol(unsigned int cmd, struct lustre_handle *hdl, int len,
  61                       void *karg, void *uarg)
  62 {
  63         struct ptlrpc_connection *conn = NULL;
  64         struct obd_device *obd = class_conn2obd(hdl);
  65         struct recovd_obd *recovd = &obd->u.recovd;
  66         struct obd_ioctl_data *data = karg;
  67         struct list_head *tmp;
  68         int rc = 0;
  69
  70         ENTRY;
  71
  72         if (cmd != OBD_IOC_RECOVD_NEWCONN && cmd != OBD_IOC_RECOVD_FAILCONN)
  73                 RETURN(-EINVAL); /* XXX ENOSYS? */
  74
  75         /* Find the connection that's been rebuilt or has failed. */
  76         spin_lock(&recovd->recovd_lock);
  77         list_for_each(tmp, &recovd->recovd_troubled_items) {
  78                 conn = list_entry(tmp, struct ptlrpc_connection,
  79                                   c_recovd_data.rd_managed_chain);
  80
  81                 LASSERT(conn->c_recovd_data.rd_recovd == recovd); /* sanity */
  82 #warning check buffer overflow in next line
  83                 if (!strcmp(conn->c_remote_uuid.uuid, data->ioc_inlbuf1))
  84                         break;
  85                 conn = NULL;
  86         }
  87
  88         if (!conn) {
  89                 if (cmd == OBD_IOC_RECOVD_NEWCONN)
  90                         GOTO(out, rc = -EINVAL);
  91                 /* XXX macroize/inline and share with loop above */
  92                 list_for_each(tmp, &recovd->recovd_managed_items) {
  93                         conn = list_entry(tmp, struct ptlrpc_connection,
  94                                           c_recovd_data.rd_managed_chain);
  95
  96                         LASSERT(conn->c_recovd_data.rd_recovd == recovd);
  97
  98 #warning check buffer overflow in next line
  99                         if (!strcmp(conn->c_remote_uuid.uuid, data->ioc_inlbuf1))
 100                                 break;
 101                         conn = NULL;
 102                 }
 103                 if (!conn)
 104                         GOTO(out, rc = -EINVAL);
 105         }
 106
 107         if (cmd == OBD_IOC_RECOVD_FAILCONN) {
 108                 spin_unlock(&recovd->recovd_lock);
 109                 recovd_conn_fail(conn);
 110                 spin_lock(&recovd->recovd_lock);
 111                 goto out;
 112         }
 113
 114
 115         /* else (NEWCONN) */
 116         spin_lock(&conn->c_lock);
 117
 118         /* whatever happens, reset the INVALID flag */
 119         conn->c_flags &= ~CONN_INVALID;
 120
 121         /* XXX is this a good check?  should we allow readdressing of
 122          * XXX conns that aren't in recovery?
 123          */
 124         if (conn->c_recovd_data.rd_phase != RD_PREPARING) {
 125                 spin_unlock(&conn->c_lock);
 126                 GOTO(out, rc = -EALREADY);
 127         }
 128
 129         if (data->ioc_inllen2) {
 130                 CERROR("conn %p UUID change %s -> %s\n",
 131                        conn, conn->c_remote_uuid.uuid, data->ioc_inlbuf2);
 132                 obd_str2uuid(&conn->c_remote_uuid, data->ioc_inlbuf2);
 133         } else {
 134                 CERROR("conn %p UUID %s reconnected\n", conn,
 135                        conn->c_remote_uuid.uuid);
 136         }
 137         ptlrpc_readdress_connection(conn, &conn->c_remote_uuid);
 138         spin_unlock(&conn->c_lock);
 139
 140         conn->c_recovd_data.rd_phase = RD_PREPARED;
 141         wake_up(&recovd->recovd_waitq);
 142  out:
 143         spin_unlock(&recovd->recovd_lock);
 144         RETURN(rc);
 145 }
 146
 147 static int connmgr_connect(struct lustre_handle *conn, struct obd_device *src,
 148                            struct obd_uuid *cluuid, struct recovd_obd *recovd,
 149                            ptlrpc_recovery_cb_t recover)
 150 {
 151         return class_connect(conn, src, cluuid);
 152 }
 153
 154 int connmgr_attach(struct obd_device *dev, obd_count len, void *data)
 155 {
 156         struct lprocfs_static_vars lvars;
 157
 158         lprocfs_init_vars(&lvars);
 159         return lprocfs_obd_attach(dev, lvars.obd_vars);
 160 }
 161
 162 int conmgr_detach(struct obd_device *dev)
 163 {
 164         return lprocfs_obd_detach(dev);
 165 }
 166
 167 /* use obd ops to offer management infrastructure */
 168 static struct obd_ops recovd_obd_ops = {
 169         o_owner:        THIS_MODULE,
 170         o_attach:       connmgr_attach,
 171         o_detach:       conmgr_detach,
 172         o_setup:        connmgr_setup,
 173         o_cleanup:      connmgr_cleanup,
 174         o_iocontrol:    connmgr_iocontrol,
 175         o_connect:      connmgr_connect,
 176         o_disconnect:   class_disconnect
 177 };
 178
 179 static int __init ptlrpc_init(void)
 180 {
 181         struct lprocfs_static_vars lvars;
 182         int rc;
 183         ENTRY;
 184
 185         rc = ptlrpc_init_portals();
 186         if (rc)
 187                 RETURN(rc);
 188         ptlrpc_init_connection();
 189
 190         lprocfs_init_vars(&lvars);
 191         rc = class_register_type(&recovd_obd_ops, lvars.module_vars,
 192                                  LUSTRE_HA_NAME);
 193         if (rc)
 194                 RETURN(rc);
 195         ptlrpc_put_connection_superhack = ptlrpc_put_connection;
 196         ptlrpc_abort_inflight_superhack = ptlrpc_abort_inflight;
 197         RETURN(0);
 198 }
 199
 200 static void __exit ptlrpc_exit(void)
 201 {
 202         class_unregister_type(LUSTRE_HA_NAME);
 203         ptlrpc_exit_portals();
 204         ptlrpc_cleanup_connection();
 205 }
 206
 207 /* recovd.c */
 208 EXPORT_SYMBOL(ptlrpc_recovd);
 209 EXPORT_SYMBOL(recovd_conn_fail);
 210 EXPORT_SYMBOL(recovd_conn_manage);
 211 EXPORT_SYMBOL(recovd_conn_fixed);
 212 EXPORT_SYMBOL(recovd_setup);
 213 EXPORT_SYMBOL(recovd_cleanup);
 214
 215 /* connection.c */
 216 EXPORT_SYMBOL(ptlrpc_readdress_connection);
 217 EXPORT_SYMBOL(ptlrpc_get_connection);
 218 EXPORT_SYMBOL(ptlrpc_put_connection);
 219 EXPORT_SYMBOL(ptlrpc_connection_addref);
 220 EXPORT_SYMBOL(ptlrpc_init_connection);
 221 EXPORT_SYMBOL(ptlrpc_cleanup_connection);
 222
 223 /* niobuf.c */
 224 EXPORT_SYMBOL(ptlrpc_bulk_put);
 225 EXPORT_SYMBOL(ptlrpc_bulk_get);
 226 EXPORT_SYMBOL(ptlrpc_register_bulk_put);
 227 EXPORT_SYMBOL(ptlrpc_register_bulk_get);
 228 EXPORT_SYMBOL(ptlrpc_abort_bulk);
 229 EXPORT_SYMBOL(ptlrpc_reply);
 230 EXPORT_SYMBOL(ptlrpc_error);
 231 EXPORT_SYMBOL(ptlrpc_resend_req);
 232 EXPORT_SYMBOL(ptl_send_rpc);
 233 EXPORT_SYMBOL(ptlrpc_link_svc_me);
 234 EXPORT_SYMBOL(obd_brw_set_free);
 235 EXPORT_SYMBOL(obd_brw_set_new);
 236 EXPORT_SYMBOL(obd_brw_set_add);
 237
 238 /* client.c */
 239 EXPORT_SYMBOL(ptlrpc_init_client);
 240 EXPORT_SYMBOL(ptlrpc_cleanup_client);
 241 EXPORT_SYMBOL(ptlrpc_req_to_uuid);
 242 EXPORT_SYMBOL(ptlrpc_uuid_to_connection);
 243 EXPORT_SYMBOL(ptlrpc_queue_wait);
 244 EXPORT_SYMBOL(ptlrpc_continue_req);
 245 EXPORT_SYMBOL(ptlrpc_replay_req);
 246 EXPORT_SYMBOL(ptlrpc_restart_req);
 247 EXPORT_SYMBOL(ptlrpc_prep_req);
 248 EXPORT_SYMBOL(ptlrpc_free_req);
 249 EXPORT_SYMBOL(ptlrpc_req_finished);
 250 EXPORT_SYMBOL(ptlrpc_request_addref);
 251 EXPORT_SYMBOL(ptlrpc_prep_bulk);
 252 EXPORT_SYMBOL(ptlrpc_free_bulk);
 253 EXPORT_SYMBOL(ptlrpc_prep_bulk_page);
 254 EXPORT_SYMBOL(ptlrpc_free_bulk_page);
 255 EXPORT_SYMBOL(ll_brw_sync_wait);
 256 EXPORT_SYMBOL(ptlrpc_abort_inflight);
 257 EXPORT_SYMBOL(ptlrpc_retain_replayable_request);
 258
 259 /* service.c */
 260 EXPORT_SYMBOL(ptlrpc_init_svc);
 261 EXPORT_SYMBOL(ptlrpc_stop_all_threads);
 262 EXPORT_SYMBOL(ptlrpc_start_thread);
 263 EXPORT_SYMBOL(ptlrpc_unregister_service);
 264
 265 /* pack_generic.c */
 266 EXPORT_SYMBOL(lustre_pack_msg);
 267 EXPORT_SYMBOL(lustre_msg_size);
 268 EXPORT_SYMBOL(lustre_unpack_msg);
 269 EXPORT_SYMBOL(lustre_msg_buf);
 270
 271 /* recover.c */
 272 EXPORT_SYMBOL(ptlrpc_run_recovery_upcall);
 273 EXPORT_SYMBOL(ptlrpc_reconnect_import);
 274 EXPORT_SYMBOL(ptlrpc_replay);
 275 EXPORT_SYMBOL(ptlrpc_resend);
 276 EXPORT_SYMBOL(ptlrpc_wake_delayed);
 277
 278 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 279 MODULE_DESCRIPTION("Lustre Request Processor");
 280 MODULE_LICENSE("GPL");
 281
 282 module_init(ptlrpc_init);
 283 module_exit(ptlrpc_exit);