--- /dev/null
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
+ * Author: Mike Shaver <shaver@clusterfs.com>
+ *
+ * This file is part of Lustre, http://www.lustre.org.
+ *
+ * Lustre is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Lustre is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define DEBUG_SUBSYSTEM S_RPC
+#ifdef __KERNEL__
+# include <linux/config.h>
+# include <linux/module.h>
+# include <linux/kmod.h>
+#else
+# include <liblustre.h>
+#endif
+
+#include <linux/obd_support.h>
+#include <linux/lustre_ha.h>
+#include <linux/lustre_net.h>
+#include <linux/lustre_import.h>
+#include <linux/lustre_export.h>
+#include <linux/obd.h>
+#include <linux/obd_class.h>
+
+#include "ptlrpc_internal.h"
+
+/* should this take an imp_sem to ensure connect is single threaded? */
+int ptlrpc_connect_import(struct obd_import *imp)
+{
+ struct obd_device *obd = imp->imp_obd;
+ int msg_flags;
+ int initial_connect = 0;
+ int rc;
+ __u64 committed_before_reconnect = 0;
+ struct ptlrpc_request *request;
+ struct lustre_handle old_hdl;
+ int size[] = {sizeof(imp->imp_target_uuid),
+ sizeof(obd->obd_uuid),
+ sizeof(imp->imp_dlm_handle)};
+ char *tmp[] = {imp->imp_target_uuid.uuid,
+ obd->obd_uuid.uuid,
+ (char *)&imp->imp_dlm_handle};
+ unsigned long flags;
+
+ spin_lock_irqsave(&imp->imp_lock, flags);
+ if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
+ spin_unlock_irqrestore(&imp->imp_lock, flags);
+ RETURN(-EALREADY);
+ } else {
+ LASSERT(imp->imp_state == LUSTRE_IMP_DISCON);
+ }
+ CDEBUG(D_HA, "%s: new state: CONNECTING\n",
+ imp->imp_client->cli_name);
+ imp->imp_state = LUSTRE_IMP_CONNECTING;
+ imp->imp_conn_cnt++;
+ if (imp->imp_remote_handle.cookie == 0) {
+ initial_connect = 1;
+ } else {
+ committed_before_reconnect = imp->imp_peer_committed_transno;
+ }
+ spin_unlock_irqrestore(&imp->imp_lock, flags);
+
+ request = ptlrpc_prep_req(imp, imp->imp_connect_op, 3, size, tmp);
+ if (!request)
+ GOTO(out, rc = -ENOMEM);
+
+ request->rq_send_state = LUSTRE_IMP_CONNECTING;
+ request->rq_replen = lustre_msg_size(0, NULL);
+
+ // lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_PEER);
+
+ rc = ptlrpc_queue_wait(request);
+ if (rc) {
+ GOTO(free_req, rc);
+ }
+
+ msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
+
+ if (initial_connect) {
+ CDEBUG(D_HA, "%s: new state: FULL\n",
+ imp->imp_client->cli_name);
+ if (msg_flags & MSG_CONNECT_REPLAYABLE)
+ imp->imp_replayable = 1;
+ imp->imp_remote_handle = request->rq_repmsg->handle;
+ imp->imp_state = LUSTRE_IMP_FULL;
+ GOTO(free_req, rc = 0);
+ }
+
+ /* Determine what recovery state to move the import to. */
+ if (MSG_CONNECT_RECONNECT & msg_flags) {
+ memset(&old_hdl, 0, sizeof(old_hdl));
+ if (!memcmp(&old_hdl, &request->rq_repmsg->handle,
+ sizeof (old_hdl))) {
+ CERROR("%s@%s didn't like our handle "LPX64
+ ", failed\n", imp->imp_target_uuid.uuid,
+ imp->imp_connection->c_remote_uuid.uuid,
+ imp->imp_dlm_handle.cookie);
+ GOTO(free_req, rc = -ENOTCONN);
+ }
+
+ if (memcmp(&imp->imp_remote_handle, &request->rq_repmsg->handle,
+ sizeof(imp->imp_remote_handle))) {
+ CERROR("%s@%s changed handle from "LPX64" to "LPX64
+ "; copying, but this may foreshadow disaster\n",
+ imp->imp_target_uuid.uuid,
+ imp->imp_connection->c_remote_uuid.uuid,
+ imp->imp_remote_handle.cookie,
+ request->rq_repmsg->handle.cookie);
+ imp->imp_remote_handle = request->rq_repmsg->handle;
+ } else {
+ CERROR("reconnected to %s@%s after partition\n",
+ imp->imp_target_uuid.uuid,
+ imp->imp_connection->c_remote_uuid.uuid);
+ }
+ CDEBUG(D_HA, "%s: new state: RECOVER\n",
+ imp->imp_client->cli_name);
+ imp->imp_state = LUSTRE_IMP_RECOVER;
+ }
+ else if (MSG_CONNECT_RECOVERING & msg_flags) {
+ CDEBUG(D_HA, "%s: new state: REPLAY\n",
+ imp->imp_client->cli_name);
+ LASSERT(imp->imp_replayable);
+ imp->imp_state = LUSTRE_IMP_RECOVER;
+ imp->imp_remote_handle = request->rq_repmsg->handle;
+ imp->imp_state = LUSTRE_IMP_REPLAY;
+ }
+ else {
+ CDEBUG(D_HA, "%s: new state: EVICTED\n",
+ imp->imp_client->cli_name);
+ imp->imp_remote_handle = request->rq_repmsg->handle;
+ imp->imp_state = LUSTRE_IMP_EVICTED;
+ }
+
+ /* Sanity checks for a reconnected import. */
+ if (!(imp->imp_replayable) !=
+ !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
+ CERROR("imp_replayable flag does not match server "
+ "after reconnect. We should LBUG right here.\n");
+ }
+
+ if (request->rq_repmsg->last_committed < committed_before_reconnect) {
+ CERROR("%s went back in time (transno "LPD64
+ " was previously committed, server now claims "LPD64
+ ")! is shared storage not coherent?\n",
+ imp->imp_target_uuid.uuid,
+ committed_before_reconnect,
+ request->rq_repmsg->last_committed);
+ }
+
+ free_req:
+ ptlrpc_req_finished(request);
+
+ out:
+ if (rc != 0)
+ imp->imp_state = LUSTRE_IMP_DISCON;
+ RETURN(rc);
+}
+
+
+
+int ptlrpc_disconnect_import(struct obd_import *imp)
+{
+ struct ptlrpc_request *request;
+ int rq_opc;
+ int rc = 0;
+ ENTRY;
+
+ switch (imp->imp_connect_op) {
+ case OST_CONNECT: rq_opc = OST_DISCONNECT; break;
+ case MDS_CONNECT: rq_opc = MDS_DISCONNECT; break;
+ case MGMT_CONNECT:rq_opc = MGMT_DISCONNECT;break;
+ default:
+ CERROR("don't know how to disconnect from %s (connect_op %d)\n",
+ imp->imp_target_uuid.uuid, imp->imp_connect_op);
+ RETURN(-EINVAL);
+ }
+
+ request = ptlrpc_prep_req(imp, rq_opc, 0, NULL, NULL);
+ if (request) {
+ request->rq_replen = lustre_msg_size(0, NULL);
+ rc = ptlrpc_queue_wait(request);
+ ptlrpc_req_finished(request);
+ }
+
+ imp->imp_state = LUSTRE_IMP_DISCON;
+ memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
+ RETURN(rc);
+}
+
git://git.whamcloud.com / fs / lustre-release.git / commitdiff