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/obd_support.h>
  28 #include <linux/obd_class.h>
  29 #include <linux/lustre_lib.h>
  30 #include <linux/lustre_ha.h>
  31 #include <linux/init.h>
  32
  33 extern int ptlrpc_init_portals(void);
  34 extern void ptlrpc_exit_portals(void);
  35
  36 int connmgr_setup(struct obd_device *obddev, obd_count len, void *buf)
  37 {
  38         struct recovd_obd *recovd = &obddev->u.recovd;
  39         int err;
  40         ENTRY;
  41
  42         MOD_INC_USE_COUNT;
  43         memset(recovd, 0, sizeof(*recovd));
  44
  45         err = recovd_setup(recovd);
  46         if (err) {
  47                 MOD_DEC_USE_COUNT;
  48                 RETURN(err);
  49         }
  50
  51         RETURN(0);
  52 }
  53
  54 int connmgr_cleanup(struct obd_device *dev)
  55 {
  56         struct recovd_obd *recovd = &dev->u.recovd;
  57         int err;
  58
  59         err = recovd_cleanup(recovd);
  60         if (err)
  61                 LBUG();
  62
  63         MOD_DEC_USE_COUNT;
  64         RETURN(0);
  65 }
  66
  67 int connmgr_iocontrol(long cmd, struct lustre_handle *hdl, int len, void *karg,
  68                       void *uarg)
  69 {
  70         struct ptlrpc_connection *conn = NULL;
  71         struct obd_device *obd = class_conn2obd(hdl);
  72         struct recovd_obd *recovd = &obd->u.recovd;
  73         struct obd_ioctl_data *data = karg;
  74         struct list_head *tmp;
  75         int rc = 0;
  76
  77         ENTRY;
  78
  79         if (cmd != OBD_IOC_RECOVD_NEWCONN && cmd != OBD_IOC_RECOVD_FAILCONN)
  80                 RETURN(-EINVAL); /* XXX ENOSYS? */
  81
  82         /* Find the connection that's been rebuilt or has failed. */
  83         spin_lock(&recovd->recovd_lock);
  84         list_for_each(tmp, &recovd->recovd_troubled_items) {
  85                 conn = list_entry(tmp, struct ptlrpc_connection,
  86                                   c_recovd_data.rd_managed_chain);
  87
  88                 LASSERT(conn->c_recovd_data.rd_recovd == recovd); /* sanity */
  89
  90                 if (!strcmp(conn->c_remote_uuid, data->ioc_inlbuf1))
  91                         break;
  92                 conn = NULL;
  93         }
  94
  95         if (!conn) {
  96                 if (cmd == OBD_IOC_RECOVD_NEWCONN)
  97                         GOTO(out, rc = -EINVAL);
  98                 /* XXX macroize/inline and share with loop above */
  99                 list_for_each(tmp, &recovd->recovd_managed_items) {
 100                         conn = list_entry(tmp, struct ptlrpc_connection,
 101                                           c_recovd_data.rd_managed_chain);
 102
 103                         LASSERT(conn->c_recovd_data.rd_recovd == recovd);
 104
 105                         if (!strcmp(conn->c_remote_uuid, data->ioc_inlbuf1))
 106                                 break;
 107                         conn = NULL;
 108                 }
 109                 if (!conn)
 110                         GOTO(out, rc = -EINVAL);
 111         }
 112
 113         if (cmd == OBD_IOC_RECOVD_FAILCONN) {
 114                 spin_unlock(&recovd->recovd_lock);
 115                 recovd_conn_fail(conn);
 116                 spin_lock(&recovd->recovd_lock);
 117
 118                 /* Jump straight to the "failed" phase of recovery. */
 119                 conn->c_recovd_data.rd_phase = RD_FAILED;
 120                 goto out;
 121         }
 122
 123
 124         /* else (NEWCONN) */
 125         spin_lock(&conn->c_lock);
 126
 127         /* whatever happens, reset the INVALID flag */
 128         conn->c_flags &= ~CONN_INVALID;
 129
 130         /* XXX is this a good check?  should we allow readdressing of
 131          * XXX conns that aren't in recovery?
 132          */
 133         if (conn->c_recovd_data.rd_phase != RD_PREPARING) {
 134                 spin_unlock(&conn->c_lock);
 135                 GOTO(out, rc = -EALREADY);
 136         }
 137
 138         if (data->ioc_inllen2) {
 139                 CERROR("conn %p UUID change %s -> %s\n",
 140                        conn, conn->c_remote_uuid, data->ioc_inlbuf2);
 141                 strcpy(conn->c_remote_uuid, data->ioc_inlbuf2);
 142         } else {
 143                 CERROR("conn %p UUID %s reconnected\n", conn,
 144                        conn->c_remote_uuid);
 145         }
 146         ptlrpc_readdress_connection(conn, conn->c_remote_uuid);
 147         spin_unlock(&conn->c_lock);
 148
 149         conn->c_recovd_data.rd_phase = RD_PREPARED;
 150         wake_up(&recovd->recovd_waitq);
 151  out:
 152         spin_unlock(&recovd->recovd_lock);
 153         RETURN(rc);
 154 }
 155
 156
 157 /* use obd ops to offer management infrastructure */
 158 static struct obd_ops recovd_obd_ops = {
 159         o_setup:       connmgr_setup,
 160         o_cleanup:     connmgr_cleanup,
 161         o_iocontrol:   connmgr_iocontrol,
 162         o_connect:     class_connect,
 163         o_disconnect:  class_disconnect
 164 };
 165
 166 static int __init ptlrpc_init(void)
 167 {
 168         int rc;
 169         rc = ptlrpc_init_portals();
 170         if (rc)
 171                 RETURN(rc);
 172         ptlrpc_init_connection();
 173         class_register_type(&recovd_obd_ops, LUSTRE_HA_NAME);
 174         return 0;
 175 }
 176
 177 static void __exit ptlrpc_exit(void)
 178 {
 179         class_unregister_type(LUSTRE_HA_NAME);
 180         ptlrpc_exit_portals();
 181         ptlrpc_cleanup_connection();
 182 }
 183
 184 /* recovd.c */
 185 EXPORT_SYMBOL(ptlrpc_recovd);
 186 EXPORT_SYMBOL(recovd_conn_fail);
 187 EXPORT_SYMBOL(recovd_conn_manage);
 188 EXPORT_SYMBOL(recovd_conn_fixed);
 189 EXPORT_SYMBOL(recovd_setup);
 190 EXPORT_SYMBOL(recovd_cleanup);
 191
 192 /* connection.c */
 193 EXPORT_SYMBOL(ptlrpc_readdress_connection);
 194 EXPORT_SYMBOL(ptlrpc_get_connection);
 195 EXPORT_SYMBOL(ptlrpc_put_connection);
 196 EXPORT_SYMBOL(ptlrpc_connection_addref);
 197 EXPORT_SYMBOL(ptlrpc_init_connection);
 198 EXPORT_SYMBOL(ptlrpc_cleanup_connection);
 199
 200 /* niobuf.c */
 201 EXPORT_SYMBOL(ptlrpc_send_bulk);
 202 EXPORT_SYMBOL(ptlrpc_register_bulk);
 203 EXPORT_SYMBOL(ptlrpc_abort_bulk);
 204 EXPORT_SYMBOL(ptlrpc_reply);
 205 EXPORT_SYMBOL(ptlrpc_error);
 206 EXPORT_SYMBOL(ptlrpc_resend_req);
 207 EXPORT_SYMBOL(ptl_send_rpc);
 208 EXPORT_SYMBOL(ptlrpc_link_svc_me);
 209
 210 /* client.c */
 211 EXPORT_SYMBOL(ptlrpc_init_client);
 212 EXPORT_SYMBOL(ptlrpc_cleanup_client);
 213 EXPORT_SYMBOL(ptlrpc_req_to_uuid);
 214 EXPORT_SYMBOL(ptlrpc_uuid_to_connection);
 215 EXPORT_SYMBOL(ptlrpc_queue_wait);
 216 EXPORT_SYMBOL(ptlrpc_continue_req);
 217 EXPORT_SYMBOL(ptlrpc_replay_req);
 218 EXPORT_SYMBOL(ptlrpc_restart_req);
 219 EXPORT_SYMBOL(ptlrpc_prep_req);
 220 EXPORT_SYMBOL(ptlrpc_free_req);
 221 EXPORT_SYMBOL(ptlrpc_req_finished);
 222 EXPORT_SYMBOL(ptlrpc_prep_bulk);
 223 EXPORT_SYMBOL(ptlrpc_free_bulk);
 224 EXPORT_SYMBOL(ptlrpc_prep_bulk_page);
 225 EXPORT_SYMBOL(ptlrpc_free_bulk_page);
 226 EXPORT_SYMBOL(ptlrpc_check_status);
 227
 228 /* service.c */
 229 EXPORT_SYMBOL(ptlrpc_init_svc);
 230 EXPORT_SYMBOL(ptlrpc_stop_all_threads);
 231 EXPORT_SYMBOL(ptlrpc_start_thread);
 232 EXPORT_SYMBOL(ptlrpc_unregister_service);
 233
 234 /* pack_generic.c */
 235 EXPORT_SYMBOL(lustre_pack_msg);
 236 EXPORT_SYMBOL(lustre_msg_size);
 237 EXPORT_SYMBOL(lustre_unpack_msg);
 238 EXPORT_SYMBOL(lustre_msg_buf);
 239
 240 /* recover.c */
 241 EXPORT_SYMBOL(ptlrpc_run_recovery_upcall);
 242 EXPORT_SYMBOL(ptlrpc_reconnect_and_replay);
 243
 244 MODULE_AUTHOR("Cluster File Systems, Inc <info@clusterfs.com>");
 245 MODULE_DESCRIPTION("Lustre Request Processor v1.0");
 246 MODULE_LICENSE("GPL");
 247
 248 module_init(ptlrpc_init);
 249 module_exit(ptlrpc_exit);