staging: add Lustre file system client support

Lustre is the most deployed distributed file system
in the HPC (High Performance Computing) world. The patch
adds its client side support.

The code is not very clean and needs to live in drivers/staging
for some time for continuing cleanup work. See
drivers/staging/lustre/TODO for details.

The code is based on Lustre master commit faefbfc04

commit faefbfc0460bc00f2ee4c1c1c86aa1e39b9eea49
Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Date:   Tue Apr 30 23:05:21 2013 +0400

    LU-3244 utils: tunefs.lustre should preserve virgin label

Plus a few under-review patches on Whamcloud gerrit:
3.8 kernel support:
http://review.whamcloud.com/#change,5973
http://review.whamcloud.com/#change,5974
http://review.whamcloud.com/#change,5768
http://review.whamcloud.com/#change,5781
http://review.whamcloud.com/#change,5763
http://review.whamcloud.com/#change,5613
http://review.whamcloud.com/#change,5655

3.9 kernel support:
http://review.whamcloud.com/#change,5898
http://review.whamcloud.com/#change,5899

Kconfig/Kbuild:
http://review.whamcloud.com/#change,4646
http://review.whamcloud.com/#change,4644

libcfs cleanup:
http://review.whamcloud.com/#change,2831
http://review.whamcloud.com/#change,4775
http://review.whamcloud.com/#change,4776
http://review.whamcloud.com/#change,4777
http://review.whamcloud.com/#change,4778
http://review.whamcloud.com/#change,4779
http://review.whamcloud.com/#change,4780

All starting/trailing whitespaces are removed, to match kernel
coding style. Also ran scripts/cleanfile on all lustre source files.

[maked the Kconfig depend on BROKEN as the recent procfs changes causes
this to fail - gregkh]

Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1397 insertions, 0 deletions

diff --git a/drivers/staging/lustre/lnet/selftest/conrpc.c b/drivers/staging/lustre/lnet/selftest/conrpc.c
new file mode 100644
index 000000000000..446de0e4672f
--- /dev/null
+++ b/drivers/staging/lustre/lnet/selftest/conrpc.c
@@ -0,0 +1,1397 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lnet/selftest/conctl.c
+ *
+ * Console framework rpcs
+ *
+ * Author: Liang Zhen <liang@whamcloud.com>
+ */
+
+
+#include <linux/libcfs/libcfs.h>
+#include <linux/lnet/lib-lnet.h>
+#include "timer.h"
+#include "conrpc.h"
+#include "console.h"
+
+void lstcon_rpc_stat_reply(lstcon_rpc_trans_t *, srpc_msg_t *,
+			   lstcon_node_t *, lstcon_trans_stat_t *);
+
+static void
+lstcon_rpc_done(srpc_client_rpc_t *rpc)
+{
+	lstcon_rpc_t *crpc = (lstcon_rpc_t *)rpc->crpc_priv;
+
+	LASSERT(crpc != NULL && rpc == crpc->crp_rpc);
+	LASSERT(crpc->crp_posted && !crpc->crp_finished);
+
+	spin_lock(&rpc->crpc_lock);
+
+	if (crpc->crp_trans == NULL) {
+		/* Orphan RPC is not in any transaction,
+		 * I'm just a poor body and nobody loves me */
+		spin_unlock(&rpc->crpc_lock);
+
+		/* release it */
+		lstcon_rpc_put(crpc);
+		return;
+	}
+
+	/* not an orphan RPC */
+	crpc->crp_finished = 1;
+
+	if (crpc->crp_stamp == 0) {
+		/* not aborted */
+		LASSERT (crpc->crp_status == 0);
+
+		crpc->crp_stamp  = cfs_time_current();
+		crpc->crp_status = rpc->crpc_status;
+	}
+
+	/* wakeup (transaction)thread if I'm the last RPC in the transaction */
+	if (atomic_dec_and_test(&crpc->crp_trans->tas_remaining))
+		wake_up(&crpc->crp_trans->tas_waitq);
+
+	spin_unlock(&rpc->crpc_lock);
+}
+
+int
+lstcon_rpc_init(lstcon_node_t *nd, int service, unsigned feats,
+		int bulk_npg, int bulk_len, int embedded, lstcon_rpc_t *crpc)
+{
+	crpc->crp_rpc = sfw_create_rpc(nd->nd_id, service,
+				       feats, bulk_npg, bulk_len,
+				       lstcon_rpc_done, (void *)crpc);
+	if (crpc->crp_rpc == NULL)
+		return -ENOMEM;
+
+	crpc->crp_trans    = NULL;
+	crpc->crp_node     = nd;
+	crpc->crp_posted   = 0;
+	crpc->crp_finished = 0;
+	crpc->crp_unpacked = 0;
+	crpc->crp_status   = 0;
+	crpc->crp_stamp    = 0;
+	crpc->crp_embedded = embedded;
+	INIT_LIST_HEAD(&crpc->crp_link);
+
+	atomic_inc(&console_session.ses_rpc_counter);
+
+	return 0;
+}
+
+int
+lstcon_rpc_prep(lstcon_node_t *nd, int service, unsigned feats,
+		int bulk_npg, int bulk_len, lstcon_rpc_t **crpcpp)
+{
+	lstcon_rpc_t  *crpc = NULL;
+	int	    rc;
+
+	spin_lock(&console_session.ses_rpc_lock);
+
+	if (!list_empty(&console_session.ses_rpc_freelist)) {
+		crpc = list_entry(console_session.ses_rpc_freelist.next,
+				      lstcon_rpc_t, crp_link);
+		list_del_init(&crpc->crp_link);
+	}
+
+	spin_unlock(&console_session.ses_rpc_lock);
+
+	if (crpc == NULL) {
+		LIBCFS_ALLOC(crpc, sizeof(*crpc));
+		if (crpc == NULL)
+			return -ENOMEM;
+	}
+
+	rc = lstcon_rpc_init(nd, service, feats, bulk_npg, bulk_len, 0, crpc);
+	if (rc == 0) {
+		*crpcpp = crpc;
+		return 0;
+	}
+
+	LIBCFS_FREE(crpc, sizeof(*crpc));
+
+	return rc;
+}
+
+void
+lstcon_rpc_put(lstcon_rpc_t *crpc)
+{
+	srpc_bulk_t *bulk = &crpc->crp_rpc->crpc_bulk;
+	int	  i;
+
+	LASSERT (list_empty(&crpc->crp_link));
+
+	for (i = 0; i < bulk->bk_niov; i++) {
+		if (bulk->bk_iovs[i].kiov_page == NULL)
+			continue;
+
+		__free_page(bulk->bk_iovs[i].kiov_page);
+	}
+
+	srpc_client_rpc_decref(crpc->crp_rpc);
+
+	if (crpc->crp_embedded) {
+		/* embedded RPC, don't recycle it */
+		memset(crpc, 0, sizeof(*crpc));
+		crpc->crp_embedded = 1;
+
+	} else {
+		spin_lock(&console_session.ses_rpc_lock);
+
+		list_add(&crpc->crp_link,
+			     &console_session.ses_rpc_freelist);
+
+		spin_unlock(&console_session.ses_rpc_lock);
+	}
+
+	/* RPC is not alive now */
+	atomic_dec(&console_session.ses_rpc_counter);
+}
+
+void
+lstcon_rpc_post(lstcon_rpc_t *crpc)
+{
+	lstcon_rpc_trans_t *trans = crpc->crp_trans;
+
+	LASSERT (trans != NULL);
+
+	atomic_inc(&trans->tas_remaining);
+	crpc->crp_posted = 1;
+
+	sfw_post_rpc(crpc->crp_rpc);
+}
+
+static char *
+lstcon_rpc_trans_name(int transop)
+{
+	if (transop == LST_TRANS_SESNEW)
+		return "SESNEW";
+
+	if (transop == LST_TRANS_SESEND)
+		return "SESEND";
+
+	if (transop == LST_TRANS_SESQRY)
+		return "SESQRY";
+
+	if (transop == LST_TRANS_SESPING)
+		return "SESPING";
+
+	if (transop == LST_TRANS_TSBCLIADD)
+		return "TSBCLIADD";
+
+	if (transop == LST_TRANS_TSBSRVADD)
+		return "TSBSRVADD";
+
+	if (transop == LST_TRANS_TSBRUN)
+		return "TSBRUN";
+
+	if (transop == LST_TRANS_TSBSTOP)
+		return "TSBSTOP";
+
+	if (transop == LST_TRANS_TSBCLIQRY)
+		return "TSBCLIQRY";
+
+	if (transop == LST_TRANS_TSBSRVQRY)
+		return "TSBSRVQRY";
+
+	if (transop == LST_TRANS_STATQRY)
+		return "STATQRY";
+
+	return "Unknown";
+}
+
+int
+lstcon_rpc_trans_prep(struct list_head *translist,
+		      int transop, lstcon_rpc_trans_t **transpp)
+{
+	lstcon_rpc_trans_t *trans;
+
+	if (translist != NULL) {
+		list_for_each_entry(trans, translist, tas_link) {
+			/* Can't enqueue two private transaction on
+			 * the same object */
+			if ((trans->tas_opc & transop) == LST_TRANS_PRIVATE)
+				return -EPERM;
+		}
+	}
+
+	/* create a trans group */
+	LIBCFS_ALLOC(trans, sizeof(*trans));
+	if (trans == NULL)
+		return -ENOMEM;
+
+	trans->tas_opc = transop;
+
+	if (translist == NULL)
+		INIT_LIST_HEAD(&trans->tas_olink);
+	else
+		list_add_tail(&trans->tas_olink, translist);
+
+	list_add_tail(&trans->tas_link, &console_session.ses_trans_list);
+
+	INIT_LIST_HEAD(&trans->tas_rpcs_list);
+	atomic_set(&trans->tas_remaining, 0);
+	init_waitqueue_head(&trans->tas_waitq);
+
+	spin_lock(&console_session.ses_rpc_lock);
+	trans->tas_features = console_session.ses_features;
+	spin_unlock(&console_session.ses_rpc_lock);
+
+	*transpp = trans;
+	return 0;
+}
+
+void
+lstcon_rpc_trans_addreq(lstcon_rpc_trans_t *trans, lstcon_rpc_t *crpc)
+{
+	list_add_tail(&crpc->crp_link, &trans->tas_rpcs_list);
+	crpc->crp_trans = trans;
+}
+
+void
+lstcon_rpc_trans_abort(lstcon_rpc_trans_t *trans, int error)
+{
+	srpc_client_rpc_t *rpc;
+	lstcon_rpc_t      *crpc;
+	lstcon_node_t     *nd;
+
+	list_for_each_entry (crpc, &trans->tas_rpcs_list, crp_link) {
+		rpc = crpc->crp_rpc;
+
+		spin_lock(&rpc->crpc_lock);
+
+		if (!crpc->crp_posted || /* not posted */
+		    crpc->crp_stamp != 0) { /* rpc done or aborted already */
+			if (crpc->crp_stamp == 0) {
+				crpc->crp_stamp = cfs_time_current();
+				crpc->crp_status = -EINTR;
+			}
+			spin_unlock(&rpc->crpc_lock);
+			continue;
+		}
+
+		crpc->crp_stamp  = cfs_time_current();
+		crpc->crp_status = error;
+
+		spin_unlock(&rpc->crpc_lock);
+
+		sfw_abort_rpc(rpc);
+
+		if  (error != ETIMEDOUT)
+			continue;
+
+		nd = crpc->crp_node;
+		if (cfs_time_after(nd->nd_stamp, crpc->crp_stamp))
+			continue;
+
+		nd->nd_stamp = crpc->crp_stamp;
+		nd->nd_state = LST_NODE_DOWN;
+	}
+}
+
+static int
+lstcon_rpc_trans_check(lstcon_rpc_trans_t *trans)
+{
+	if (console_session.ses_shutdown &&
+	    !list_empty(&trans->tas_olink)) /* Not an end session RPC */
+		return 1;
+
+	return (atomic_read(&trans->tas_remaining) == 0) ? 1: 0;
+}
+
+int
+lstcon_rpc_trans_postwait(lstcon_rpc_trans_t *trans, int timeout)
+{
+	lstcon_rpc_t  *crpc;
+	int	    rc;
+
+	if (list_empty(&trans->tas_rpcs_list))
+		return 0;
+
+	if (timeout < LST_TRANS_MIN_TIMEOUT)
+		timeout = LST_TRANS_MIN_TIMEOUT;
+
+	CDEBUG(D_NET, "Transaction %s started\n",
+	       lstcon_rpc_trans_name(trans->tas_opc));
+
+	/* post all requests */
+	list_for_each_entry (crpc, &trans->tas_rpcs_list, crp_link) {
+		LASSERT (!crpc->crp_posted);
+
+		lstcon_rpc_post(crpc);
+	}
+
+	mutex_unlock(&console_session.ses_mutex);
+
+	rc = wait_event_interruptible_timeout(trans->tas_waitq,
+					      lstcon_rpc_trans_check(trans),
+					      cfs_time_seconds(timeout));
+	rc = (rc > 0) ? 0 : ((rc < 0) ? -EINTR : -ETIMEDOUT);
+
+	mutex_lock(&console_session.ses_mutex);
+
+	if (console_session.ses_shutdown)
+		rc = -ESHUTDOWN;
+
+	if (rc != 0 || atomic_read(&trans->tas_remaining) != 0) {
+		/* treat short timeout as canceled */
+		if (rc == -ETIMEDOUT && timeout < LST_TRANS_MIN_TIMEOUT * 2)
+			rc = -EINTR;
+
+		lstcon_rpc_trans_abort(trans, rc);
+	}
+
+	CDEBUG(D_NET, "Transaction %s stopped: %d\n",
+	       lstcon_rpc_trans_name(trans->tas_opc), rc);
+
+	lstcon_rpc_trans_stat(trans, lstcon_trans_stat());
+
+	return rc;
+}
+
+int
+lstcon_rpc_get_reply(lstcon_rpc_t *crpc, srpc_msg_t **msgpp)
+{
+	lstcon_node_t	*nd  = crpc->crp_node;
+	srpc_client_rpc_t    *rpc = crpc->crp_rpc;
+	srpc_generic_reply_t *rep;
+
+	LASSERT (nd != NULL && rpc != NULL);
+	LASSERT (crpc->crp_stamp != 0);
+
+	if (crpc->crp_status != 0) {
+		*msgpp = NULL;
+		return crpc->crp_status;
+	}
+
+	*msgpp = &rpc->crpc_replymsg;
+	if (!crpc->crp_unpacked) {
+		sfw_unpack_message(*msgpp);
+		crpc->crp_unpacked = 1;
+	}
+
+	if (cfs_time_after(nd->nd_stamp, crpc->crp_stamp))
+		return 0;
+
+	nd->nd_stamp = crpc->crp_stamp;
+	rep = &(*msgpp)->msg_body.reply;
+
+	if (rep->sid.ses_nid == LNET_NID_ANY)
+		nd->nd_state = LST_NODE_UNKNOWN;
+	else if (lstcon_session_match(rep->sid))
+		nd->nd_state = LST_NODE_ACTIVE;
+	else
+		nd->nd_state = LST_NODE_BUSY;
+
+	return 0;
+}
+
+void
+lstcon_rpc_trans_stat(lstcon_rpc_trans_t *trans, lstcon_trans_stat_t *stat)
+{
+	lstcon_rpc_t      *crpc;
+	srpc_msg_t	*rep;
+	int		error;
+
+	LASSERT (stat != NULL);
+
+	memset(stat, 0, sizeof(*stat));
+
+	list_for_each_entry(crpc, &trans->tas_rpcs_list, crp_link) {
+		lstcon_rpc_stat_total(stat, 1);
+
+		LASSERT (crpc->crp_stamp != 0);
+
+		error = lstcon_rpc_get_reply(crpc, &rep);
+		if (error != 0) {
+			lstcon_rpc_stat_failure(stat, 1);
+			if (stat->trs_rpc_errno == 0)
+				stat->trs_rpc_errno = -error;
+
+			continue;
+		}
+
+		lstcon_rpc_stat_success(stat, 1);
+
+		lstcon_rpc_stat_reply(trans, rep, crpc->crp_node, stat);
+	}
+
+	if (trans->tas_opc == LST_TRANS_SESNEW && stat->trs_fwk_errno == 0) {
+		stat->trs_fwk_errno =
+		      lstcon_session_feats_check(trans->tas_features);
+	}
+
+	CDEBUG(D_NET, "transaction %s : success %d, failure %d, total %d, "
+		      "RPC error(%d), Framework error(%d)\n",
+	       lstcon_rpc_trans_name(trans->tas_opc),
+	       lstcon_rpc_stat_success(stat, 0),
+	       lstcon_rpc_stat_failure(stat, 0),
+	       lstcon_rpc_stat_total(stat, 0),
+	       stat->trs_rpc_errno, stat->trs_fwk_errno);
+
+	return;
+}
+
+int
+lstcon_rpc_trans_interpreter(lstcon_rpc_trans_t *trans,
+			     struct list_head *head_up,
+			     lstcon_rpc_readent_func_t readent)
+{
+	struct list_head	    tmp;
+	struct list_head	   *next;
+	lstcon_rpc_ent_t     *ent;
+	srpc_generic_reply_t *rep;
+	lstcon_rpc_t	 *crpc;
+	srpc_msg_t	   *msg;
+	lstcon_node_t	*nd;
+	cfs_duration_t	dur;
+	struct timeval	tv;
+	int		   error;
+
+	LASSERT (head_up != NULL);
+
+	next = head_up;
+
+	list_for_each_entry(crpc, &trans->tas_rpcs_list, crp_link) {
+		if (copy_from_user(&tmp, next,
+				       sizeof(struct list_head)))
+			return -EFAULT;
+
+		if (tmp.next == head_up)
+			return 0;
+
+		next = tmp.next;
+
+		ent = list_entry(next, lstcon_rpc_ent_t, rpe_link);
+
+		LASSERT (crpc->crp_stamp != 0);
+
+		error = lstcon_rpc_get_reply(crpc, &msg);
+
+		nd = crpc->crp_node;
+
+		dur = (cfs_duration_t)cfs_time_sub(crpc->crp_stamp,
+		      (cfs_time_t)console_session.ses_id.ses_stamp);
+		cfs_duration_usec(dur, &tv);
+
+		if (copy_to_user(&ent->rpe_peer,
+				     &nd->nd_id, sizeof(lnet_process_id_t)) ||
+		    copy_to_user(&ent->rpe_stamp, &tv, sizeof(tv)) ||
+		    copy_to_user(&ent->rpe_state,
+				     &nd->nd_state, sizeof(nd->nd_state)) ||
+		    copy_to_user(&ent->rpe_rpc_errno, &error,
+				     sizeof(error)))
+			return -EFAULT;
+
+		if (error != 0)
+			continue;
+
+		/* RPC is done */
+		rep = (srpc_generic_reply_t *)&msg->msg_body.reply;
+
+		if (copy_to_user(&ent->rpe_sid,
+				     &rep->sid, sizeof(lst_sid_t)) ||
+		    copy_to_user(&ent->rpe_fwk_errno,
+				     &rep->status, sizeof(rep->status)))
+			return -EFAULT;
+
+		if (readent == NULL)
+			continue;
+
+		if ((error = readent(trans->tas_opc, msg, ent)) != 0)
+			return error;
+	}
+
+	return 0;
+}
+
+void
+lstcon_rpc_trans_destroy(lstcon_rpc_trans_t *trans)
+{
+	srpc_client_rpc_t *rpc;
+	lstcon_rpc_t      *crpc;
+	lstcon_rpc_t      *tmp;
+	int		count = 0;
+
+	list_for_each_entry_safe(crpc, tmp, &trans->tas_rpcs_list,
+				 crp_link) {
+		rpc = crpc->crp_rpc;
+
+		spin_lock(&rpc->crpc_lock);
+
+		/* free it if not posted or finished already */
+		if (!crpc->crp_posted || crpc->crp_finished) {
+			spin_unlock(&rpc->crpc_lock);
+
+			list_del_init(&crpc->crp_link);
+			lstcon_rpc_put(crpc);
+
+			continue;
+		}
+
+		/* rpcs can be still not callbacked (even LNetMDUnlink is called)
+		 * because huge timeout for inaccessible network, don't make
+		 * user wait for them, just abandon them, they will be recycled
+		 * in callback */
+
+		LASSERT (crpc->crp_status != 0);
+
+		crpc->crp_node  = NULL;
+		crpc->crp_trans = NULL;
+		list_del_init(&crpc->crp_link);
+		count ++;
+
+		spin_unlock(&rpc->crpc_lock);
+
+		atomic_dec(&trans->tas_remaining);
+	}
+
+	LASSERT (atomic_read(&trans->tas_remaining) == 0);
+
+	list_del(&trans->tas_link);
+	if (!list_empty(&trans->tas_olink))
+		list_del(&trans->tas_olink);
+
+	CDEBUG(D_NET, "Transaction %s destroyed with %d pending RPCs\n",
+	       lstcon_rpc_trans_name(trans->tas_opc), count);
+
+	LIBCFS_FREE(trans, sizeof(*trans));
+
+	return;
+}
+
+int
+lstcon_sesrpc_prep(lstcon_node_t *nd, int transop,
+		   unsigned feats, lstcon_rpc_t **crpc)
+{
+	srpc_mksn_reqst_t *msrq;
+	srpc_rmsn_reqst_t *rsrq;
+	int		rc;
+
+	switch (transop) {
+	case LST_TRANS_SESNEW:
+		rc = lstcon_rpc_prep(nd, SRPC_SERVICE_MAKE_SESSION,
+				     feats, 0, 0, crpc);
+		if (rc != 0)
+			return rc;
+
+		msrq = &(*crpc)->crp_rpc->crpc_reqstmsg.msg_body.mksn_reqst;
+		msrq->mksn_sid     = console_session.ses_id;
+		msrq->mksn_force   = console_session.ses_force;
+		strncpy(msrq->mksn_name, console_session.ses_name,
+			strlen(console_session.ses_name));
+		break;
+
+	case LST_TRANS_SESEND:
+		rc = lstcon_rpc_prep(nd, SRPC_SERVICE_REMOVE_SESSION,
+				     feats, 0, 0, crpc);
+		if (rc != 0)
+			return rc;
+
+		rsrq = &(*crpc)->crp_rpc->crpc_reqstmsg.msg_body.rmsn_reqst;
+		rsrq->rmsn_sid = console_session.ses_id;
+		break;
+
+	default:
+		LBUG();
+	}
+
+	return 0;
+}
+
+int
+lstcon_dbgrpc_prep(lstcon_node_t *nd, unsigned feats, lstcon_rpc_t **crpc)
+{
+	srpc_debug_reqst_t *drq;
+	int		    rc;
+
+	rc = lstcon_rpc_prep(nd, SRPC_SERVICE_DEBUG, feats, 0, 0, crpc);
+	if (rc != 0)
+		return rc;
+
+	drq = &(*crpc)->crp_rpc->crpc_reqstmsg.msg_body.dbg_reqst;
+
+	drq->dbg_sid   = console_session.ses_id;
+	drq->dbg_flags = 0;
+
+	return rc;
+}
+
+int
+lstcon_batrpc_prep(lstcon_node_t *nd, int transop, unsigned feats,
+		   lstcon_tsb_hdr_t *tsb, lstcon_rpc_t **crpc)
+{
+	lstcon_batch_t	   *batch;
+	srpc_batch_reqst_t *brq;
+	int		    rc;
+
+	rc = lstcon_rpc_prep(nd, SRPC_SERVICE_BATCH, feats, 0, 0, crpc);
+	if (rc != 0)
+		return rc;
+
+	brq = &(*crpc)->crp_rpc->crpc_reqstmsg.msg_body.bat_reqst;
+
+	brq->bar_sid     = console_session.ses_id;
+	brq->bar_bid     = tsb->tsb_id;
+	brq->bar_testidx = tsb->tsb_index;
+	brq->bar_opc     = transop == LST_TRANS_TSBRUN ? SRPC_BATCH_OPC_RUN :
+			   (transop == LST_TRANS_TSBSTOP ? SRPC_BATCH_OPC_STOP:
+			    SRPC_BATCH_OPC_QUERY);
+
+	if (transop != LST_TRANS_TSBRUN &&
+	    transop != LST_TRANS_TSBSTOP)
+		return 0;
+
+	LASSERT (tsb->tsb_index == 0);
+
+	batch = (lstcon_batch_t *)tsb;
+	brq->bar_arg = batch->bat_arg;
+
+	return 0;
+}
+
+int
+lstcon_statrpc_prep(lstcon_node_t *nd, unsigned feats, lstcon_rpc_t **crpc)
+{
+	srpc_stat_reqst_t *srq;
+	int		   rc;
+
+	rc = lstcon_rpc_prep(nd, SRPC_SERVICE_QUERY_STAT, feats, 0, 0, crpc);
+	if (rc != 0)
+		return rc;
+
+	srq = &(*crpc)->crp_rpc->crpc_reqstmsg.msg_body.stat_reqst;
+
+	srq->str_sid  = console_session.ses_id;
+	srq->str_type = 0; /* XXX remove it */
+
+	return 0;
+}
+
+lnet_process_id_packed_t *
+lstcon_next_id(int idx, int nkiov, lnet_kiov_t *kiov)
+{
+	lnet_process_id_packed_t *pid;
+	int		       i;
+
+	i = idx / SFW_ID_PER_PAGE;
+
+	LASSERT (i < nkiov);
+
+	pid = (lnet_process_id_packed_t *)page_address(kiov[i].kiov_page);
+
+	return &pid[idx % SFW_ID_PER_PAGE];
+}
+
+int
+lstcon_dstnodes_prep(lstcon_group_t *grp, int idx,
+		     int dist, int span, int nkiov, lnet_kiov_t *kiov)
+{
+	lnet_process_id_packed_t *pid;
+	lstcon_ndlink_t	  *ndl;
+	lstcon_node_t	    *nd;
+	int		       start;
+	int		       end;
+	int		       i = 0;
+
+	LASSERT (dist >= 1);
+	LASSERT (span >= 1);
+	LASSERT (grp->grp_nnode >= 1);
+
+	if (span > grp->grp_nnode)
+		return -EINVAL;
+
+	start = ((idx / dist) * span) % grp->grp_nnode;
+	end   = ((idx / dist) * span + span - 1) % grp->grp_nnode;
+
+	list_for_each_entry(ndl, &grp->grp_ndl_list, ndl_link) {
+		nd = ndl->ndl_node;
+		if (i < start) {
+			i ++;
+			continue;
+		}
+
+		if (i > (end >= start ? end: grp->grp_nnode))
+			break;
+
+		pid = lstcon_next_id((i - start), nkiov, kiov);
+		pid->nid = nd->nd_id.nid;
+		pid->pid = nd->nd_id.pid;
+		i++;
+	}
+
+	if (start <= end) /* done */
+		return 0;
+
+	list_for_each_entry(ndl, &grp->grp_ndl_list, ndl_link) {
+		if (i > grp->grp_nnode + end)
+			break;
+
+		nd = ndl->ndl_node;
+		pid = lstcon_next_id((i - start), nkiov, kiov);
+		pid->nid = nd->nd_id.nid;
+		pid->pid = nd->nd_id.pid;
+		i++;
+	}
+
+	return 0;
+}
+
+int
+lstcon_pingrpc_prep(lst_test_ping_param_t *param, srpc_test_reqst_t *req)
+{
+	test_ping_req_t *prq = &req->tsr_u.ping;
+
+	prq->png_size   = param->png_size;
+	prq->png_flags  = param->png_flags;
+	/* TODO dest */
+	return 0;
+}
+
+int
+lstcon_bulkrpc_v0_prep(lst_test_bulk_param_t *param, srpc_test_reqst_t *req)
+{
+	test_bulk_req_t *brq = &req->tsr_u.bulk_v0;
+
+	brq->blk_opc    = param->blk_opc;
+	brq->blk_npg    = (param->blk_size + PAGE_CACHE_SIZE - 1) / PAGE_CACHE_SIZE;
+	brq->blk_flags  = param->blk_flags;
+
+	return 0;
+}
+
+int
+lstcon_bulkrpc_v1_prep(lst_test_bulk_param_t *param, srpc_test_reqst_t *req)
+{
+	test_bulk_req_v1_t *brq = &req->tsr_u.bulk_v1;
+
+	brq->blk_opc	= param->blk_opc;
+	brq->blk_flags	= param->blk_flags;
+	brq->blk_len	= param->blk_size;
+	brq->blk_offset	= 0; /* reserved */
+
+	return 0;
+}
+
+int
+lstcon_testrpc_prep(lstcon_node_t *nd, int transop, unsigned feats,
+		    lstcon_test_t *test, lstcon_rpc_t **crpc)
+{
+	lstcon_group_t    *sgrp = test->tes_src_grp;
+	lstcon_group_t    *dgrp = test->tes_dst_grp;
+	srpc_test_reqst_t *trq;
+	srpc_bulk_t       *bulk;
+	int		i;
+	int		   npg = 0;
+	int		   nob = 0;
+	int		   rc  = 0;
+
+	if (transop == LST_TRANS_TSBCLIADD) {
+		npg = sfw_id_pages(test->tes_span);
+		nob = (feats & LST_FEAT_BULK_LEN) == 0 ?
+		      npg * PAGE_CACHE_SIZE :
+		      sizeof(lnet_process_id_packed_t) * test->tes_span;
+	}
+
+	rc = lstcon_rpc_prep(nd, SRPC_SERVICE_TEST, feats, npg, nob, crpc);
+	if (rc != 0)
+		return rc;
+
+	trq  = &(*crpc)->crp_rpc->crpc_reqstmsg.msg_body.tes_reqst;
+
+	if (transop == LST_TRANS_TSBSRVADD) {
+		int ndist = (sgrp->grp_nnode + test->tes_dist - 1) / test->tes_dist;
+		int nspan = (dgrp->grp_nnode + test->tes_span - 1) / test->tes_span;
+		int nmax = (ndist + nspan - 1) / nspan;
+
+		trq->tsr_ndest = 0;
+		trq->tsr_loop  = nmax * test->tes_dist * test->tes_concur;
+
+	} else {
+		bulk = &(*crpc)->crp_rpc->crpc_bulk;
+
+		for (i = 0; i < npg; i++) {
+			int	len;
+
+			LASSERT(nob > 0);
+
+			len = (feats & LST_FEAT_BULK_LEN) == 0 ?
+			      PAGE_CACHE_SIZE : min_t(int, nob, PAGE_CACHE_SIZE);
+			nob -= len;
+
+			bulk->bk_iovs[i].kiov_offset = 0;
+			bulk->bk_iovs[i].kiov_len    = len;
+			bulk->bk_iovs[i].kiov_page   =
+				alloc_page(GFP_IOFS);
+
+			if (bulk->bk_iovs[i].kiov_page == NULL) {
+				lstcon_rpc_put(*crpc);
+				return -ENOMEM;
+			}
+		}
+
+		bulk->bk_sink = 0;
+
+		LASSERT (transop == LST_TRANS_TSBCLIADD);
+
+		rc = lstcon_dstnodes_prep(test->tes_dst_grp,
+					  test->tes_cliidx++,
+					  test->tes_dist,
+					  test->tes_span,
+					  npg, &bulk->bk_iovs[0]);
+		if (rc != 0) {
+			lstcon_rpc_put(*crpc);
+			return rc;
+		}
+
+		trq->tsr_ndest = test->tes_span;
+		trq->tsr_loop  = test->tes_loop;
+	}
+
+	trq->tsr_sid	= console_session.ses_id;
+	trq->tsr_bid	= test->tes_hdr.tsb_id;
+	trq->tsr_concur     = test->tes_concur;
+	trq->tsr_is_client  = (transop == LST_TRANS_TSBCLIADD) ? 1 : 0;
+	trq->tsr_stop_onerr = !!test->tes_stop_onerr;
+
+	switch (test->tes_type) {
+	case LST_TEST_PING:
+		trq->tsr_service = SRPC_SERVICE_PING;
+		rc = lstcon_pingrpc_prep((lst_test_ping_param_t *)
+					 &test->tes_param[0], trq);
+		break;
+
+	case LST_TEST_BULK:
+		trq->tsr_service = SRPC_SERVICE_BRW;
+		if ((feats & LST_FEAT_BULK_LEN) == 0) {
+			rc = lstcon_bulkrpc_v0_prep((lst_test_bulk_param_t *)
+						    &test->tes_param[0], trq);
+		} else {
+			rc = lstcon_bulkrpc_v1_prep((lst_test_bulk_param_t *)
+						    &test->tes_param[0], trq);
+		}
+
+		break;
+	default:
+		LBUG();
+		break;
+	}
+
+	return rc;
+}
+
+int
+lstcon_sesnew_stat_reply(lstcon_rpc_trans_t *trans,
+			 lstcon_node_t *nd, srpc_msg_t *reply)
+{
+	srpc_mksn_reply_t *mksn_rep = &reply->msg_body.mksn_reply;
+	int		   status   = mksn_rep->mksn_status;
+
+	if (status == 0 &&
+	    (reply->msg_ses_feats & ~LST_FEATS_MASK) != 0) {
+		mksn_rep->mksn_status = EPROTO;
+		status = EPROTO;
+	}
+
+	if (status == EPROTO) {
+		CNETERR("session protocol error from %s: %u\n",
+			libcfs_nid2str(nd->nd_id.nid),
+			reply->msg_ses_feats);
+	}
+
+	if (status != 0)
+		return status;
+
+	if (!trans->tas_feats_updated) {
+		trans->tas_feats_updated = 1;
+		trans->tas_features = reply->msg_ses_feats;
+	}
+
+	if (reply->msg_ses_feats != trans->tas_features) {
+		CNETERR("Framework features %x from %s is different with "
+			"features on this transaction: %x\n",
+			 reply->msg_ses_feats, libcfs_nid2str(nd->nd_id.nid),
+			 trans->tas_features);
+		status = mksn_rep->mksn_status = EPROTO;
+	}
+
+	if (status == 0) {
+		/* session timeout on remote node */
+		nd->nd_timeout = mksn_rep->mksn_timeout;
+	}
+
+	return status;
+}
+
+void
+lstcon_rpc_stat_reply(lstcon_rpc_trans_t *trans, srpc_msg_t *msg,
+		      lstcon_node_t *nd, lstcon_trans_stat_t *stat)
+{
+	srpc_rmsn_reply_t  *rmsn_rep;
+	srpc_debug_reply_t *dbg_rep;
+	srpc_batch_reply_t *bat_rep;
+	srpc_test_reply_t  *test_rep;
+	srpc_stat_reply_t  *stat_rep;
+	int		 rc = 0;
+
+	switch (trans->tas_opc) {
+	case LST_TRANS_SESNEW:
+		rc = lstcon_sesnew_stat_reply(trans, nd, msg);
+		if (rc == 0) {
+			lstcon_sesop_stat_success(stat, 1);
+			return;
+		}
+
+		lstcon_sesop_stat_failure(stat, 1);
+		break;
+
+	case LST_TRANS_SESEND:
+		rmsn_rep = &msg->msg_body.rmsn_reply;
+		/* ESRCH is not an error for end session */
+		if (rmsn_rep->rmsn_status == 0 ||
+		    rmsn_rep->rmsn_status == ESRCH) {
+			lstcon_sesop_stat_success(stat, 1);
+			return;
+		}
+
+		lstcon_sesop_stat_failure(stat, 1);
+		rc = rmsn_rep->rmsn_status;
+		break;
+
+	case LST_TRANS_SESQRY:
+	case LST_TRANS_SESPING:
+		dbg_rep = &msg->msg_body.dbg_reply;
+
+		if (dbg_rep->dbg_status == ESRCH) {
+			lstcon_sesqry_stat_unknown(stat, 1);
+			return;
+		}
+
+		if (lstcon_session_match(dbg_rep->dbg_sid))
+			lstcon_sesqry_stat_active(stat, 1);
+		else
+			lstcon_sesqry_stat_busy(stat, 1);
+		return;
+
+	case LST_TRANS_TSBRUN:
+	case LST_TRANS_TSBSTOP:
+		bat_rep = &msg->msg_body.bat_reply;
+
+		if (bat_rep->bar_status == 0) {
+			lstcon_tsbop_stat_success(stat, 1);
+			return;
+		}
+
+		if (bat_rep->bar_status == EPERM &&
+		    trans->tas_opc == LST_TRANS_TSBSTOP) {
+			lstcon_tsbop_stat_success(stat, 1);
+			return;
+		}
+
+		lstcon_tsbop_stat_failure(stat, 1);
+		rc = bat_rep->bar_status;
+		break;
+
+	case LST_TRANS_TSBCLIQRY:
+	case LST_TRANS_TSBSRVQRY:
+		bat_rep = &msg->msg_body.bat_reply;
+
+		if (bat_rep->bar_active != 0)
+			lstcon_tsbqry_stat_run(stat, 1);
+		else
+			lstcon_tsbqry_stat_idle(stat, 1);
+
+		if (bat_rep->bar_status == 0)
+			return;
+
+		lstcon_tsbqry_stat_failure(stat, 1);
+		rc = bat_rep->bar_status;
+		break;
+
+	case LST_TRANS_TSBCLIADD:
+	case LST_TRANS_TSBSRVADD:
+		test_rep = &msg->msg_body.tes_reply;
+
+		if (test_rep->tsr_status == 0) {
+			lstcon_tsbop_stat_success(stat, 1);
+			return;
+		}
+
+		lstcon_tsbop_stat_failure(stat, 1);
+		rc = test_rep->tsr_status;
+		break;
+
+	case LST_TRANS_STATQRY:
+		stat_rep = &msg->msg_body.stat_reply;
+
+		if (stat_rep->str_status == 0) {
+			lstcon_statqry_stat_success(stat, 1);
+			return;
+		}
+
+		lstcon_statqry_stat_failure(stat, 1);
+		rc = stat_rep->str_status;
+		break;
+
+	default:
+		LBUG();
+	}
+
+	if (stat->trs_fwk_errno == 0)
+		stat->trs_fwk_errno = rc;
+
+	return;
+}
+
+int
+lstcon_rpc_trans_ndlist(struct list_head *ndlist,
+			struct list_head *translist, int transop,
+			void *arg, lstcon_rpc_cond_func_t condition,
+			lstcon_rpc_trans_t **transpp)
+{
+	lstcon_rpc_trans_t *trans;
+	lstcon_ndlink_t    *ndl;
+	lstcon_node_t      *nd;
+	lstcon_rpc_t       *rpc;
+	unsigned	    feats;
+	int		 rc;
+
+	/* Creating session RPG for list of nodes */
+
+	rc = lstcon_rpc_trans_prep(translist, transop, &trans);
+	if (rc != 0) {
+		CERROR("Can't create transaction %d: %d\n", transop, rc);
+		return rc;
+	}
+
+	feats = trans->tas_features;
+	list_for_each_entry(ndl, ndlist, ndl_link) {
+		rc = condition == NULL ? 1 :
+		     condition(transop, ndl->ndl_node, arg);
+
+		if (rc == 0)
+			continue;
+
+		if (rc < 0) {
+			CDEBUG(D_NET, "Condition error while creating RPC "
+				      " for transaction %d: %d\n", transop, rc);
+			break;
+		}
+
+		nd = ndl->ndl_node;
+
+		switch (transop) {
+		case LST_TRANS_SESNEW:
+		case LST_TRANS_SESEND:
+			rc = lstcon_sesrpc_prep(nd, transop, feats, &rpc);
+			break;
+		case LST_TRANS_SESQRY:
+		case LST_TRANS_SESPING:
+			rc = lstcon_dbgrpc_prep(nd, feats, &rpc);
+			break;
+		case LST_TRANS_TSBCLIADD:
+		case LST_TRANS_TSBSRVADD:
+			rc = lstcon_testrpc_prep(nd, transop, feats,
+						 (lstcon_test_t *)arg, &rpc);
+			break;
+		case LST_TRANS_TSBRUN:
+		case LST_TRANS_TSBSTOP:
+		case LST_TRANS_TSBCLIQRY:
+		case LST_TRANS_TSBSRVQRY:
+			rc = lstcon_batrpc_prep(nd, transop, feats,
+						(lstcon_tsb_hdr_t *)arg, &rpc);
+			break;
+		case LST_TRANS_STATQRY:
+			rc = lstcon_statrpc_prep(nd, feats, &rpc);
+			break;
+		default:
+			rc = -EINVAL;
+			break;
+		}
+
+		if (rc != 0) {
+			CERROR("Failed to create RPC for transaction %s: %d\n",
+			       lstcon_rpc_trans_name(transop), rc);
+			break;
+		}
+
+		lstcon_rpc_trans_addreq(trans, rpc);
+	}
+
+	if (rc == 0) {
+		*transpp = trans;
+		return 0;
+	}
+
+	lstcon_rpc_trans_destroy(trans);
+
+	return rc;
+}
+
+void
+lstcon_rpc_pinger(void *arg)
+{
+	stt_timer_t	*ptimer = (stt_timer_t *)arg;
+	lstcon_rpc_trans_t *trans;
+	lstcon_rpc_t       *crpc;
+	srpc_msg_t	 *rep;
+	srpc_debug_reqst_t *drq;
+	lstcon_ndlink_t    *ndl;
+	lstcon_node_t      *nd;
+	time_t	      intv;
+	int		 count = 0;
+	int		 rc;
+
+	/* RPC pinger is a special case of transaction,
+	 * it's called by timer at 8 seconds interval.
+	 */
+	mutex_lock(&console_session.ses_mutex);
+
+	if (console_session.ses_shutdown || console_session.ses_expired) {
+		mutex_unlock(&console_session.ses_mutex);
+		return;
+	}
+
+	if (!console_session.ses_expired &&
+	    cfs_time_current_sec() - console_session.ses_laststamp >
+	    (time_t)console_session.ses_timeout)
+		console_session.ses_expired = 1;
+
+	trans = console_session.ses_ping;
+
+	LASSERT (trans != NULL);
+
+	list_for_each_entry(ndl, &console_session.ses_ndl_list, ndl_link) {
+		nd = ndl->ndl_node;
+
+		if (console_session.ses_expired) {
+			/* idle console, end session on all nodes */
+			if (nd->nd_state != LST_NODE_ACTIVE)
+				continue;
+
+			rc = lstcon_sesrpc_prep(nd, LST_TRANS_SESEND,
+						trans->tas_features, &crpc);
+			if (rc != 0) {
+				CERROR("Out of memory\n");
+				break;
+			}
+
+			lstcon_rpc_trans_addreq(trans, crpc);
+			lstcon_rpc_post(crpc);
+
+			continue;
+		}
+
+		crpc = &nd->nd_ping;
+
+		if (crpc->crp_rpc != NULL) {
+			LASSERT (crpc->crp_trans == trans);
+			LASSERT (!list_empty(&crpc->crp_link));
+
+			spin_lock(&crpc->crp_rpc->crpc_lock);
+
+			LASSERT(crpc->crp_posted);
+
+			if (!crpc->crp_finished) {
+				/* in flight */
+				spin_unlock(&crpc->crp_rpc->crpc_lock);
+				continue;
+			}
+
+			spin_unlock(&crpc->crp_rpc->crpc_lock);
+
+			lstcon_rpc_get_reply(crpc, &rep);
+
+			list_del_init(&crpc->crp_link);
+
+			lstcon_rpc_put(crpc);
+		}
+
+		if (nd->nd_state != LST_NODE_ACTIVE)
+			continue;
+
+		intv = cfs_duration_sec(cfs_time_sub(cfs_time_current(),
+						     nd->nd_stamp));
+		if (intv < (time_t)nd->nd_timeout / 2)
+			continue;
+
+		rc = lstcon_rpc_init(nd, SRPC_SERVICE_DEBUG,
+				     trans->tas_features, 0, 0, 1, crpc);
+		if (rc != 0) {
+			CERROR("Out of memory\n");
+			break;
+		}
+
+		drq = &crpc->crp_rpc->crpc_reqstmsg.msg_body.dbg_reqst;
+
+		drq->dbg_sid   = console_session.ses_id;
+		drq->dbg_flags = 0;
+
+		lstcon_rpc_trans_addreq(trans, crpc);
+		lstcon_rpc_post(crpc);
+
+		count ++;
+	}
+
+	if (console_session.ses_expired) {
+		mutex_unlock(&console_session.ses_mutex);
+		return;
+	}
+
+	CDEBUG(D_NET, "Ping %d nodes in session\n", count);
+
+	ptimer->stt_expires = (cfs_time_t)(cfs_time_current_sec() + LST_PING_INTERVAL);
+	stt_add_timer(ptimer);
+
+	mutex_unlock(&console_session.ses_mutex);
+}
+
+int
+lstcon_rpc_pinger_start(void)
+{
+	stt_timer_t    *ptimer;
+	int	     rc;
+
+	LASSERT (list_empty(&console_session.ses_rpc_freelist));
+	LASSERT (atomic_read(&console_session.ses_rpc_counter) == 0);
+
+	rc = lstcon_rpc_trans_prep(NULL, LST_TRANS_SESPING,
+				   &console_session.ses_ping);
+	if (rc != 0) {
+		CERROR("Failed to create console pinger\n");
+		return rc;
+	}
+
+	ptimer = &console_session.ses_ping_timer;
+	ptimer->stt_expires = (cfs_time_t)(cfs_time_current_sec() + LST_PING_INTERVAL);
+
+	stt_add_timer(ptimer);
+
+	return 0;
+}
+
+void
+lstcon_rpc_pinger_stop(void)
+{
+	LASSERT (console_session.ses_shutdown);
+
+	stt_del_timer(&console_session.ses_ping_timer);
+
+	lstcon_rpc_trans_abort(console_session.ses_ping, -ESHUTDOWN);
+	lstcon_rpc_trans_stat(console_session.ses_ping, lstcon_trans_stat());
+	lstcon_rpc_trans_destroy(console_session.ses_ping);
+
+	memset(lstcon_trans_stat(), 0, sizeof(lstcon_trans_stat_t));
+
+	console_session.ses_ping = NULL;
+}
+
+void
+lstcon_rpc_cleanup_wait(void)
+{
+	lstcon_rpc_trans_t *trans;
+	lstcon_rpc_t       *crpc;
+	struct list_head	 *pacer;
+	struct list_head	  zlist;
+
+	/* Called with hold of global mutex */
+
+	LASSERT (console_session.ses_shutdown);
+
+	while (!list_empty(&console_session.ses_trans_list)) {
+		list_for_each(pacer, &console_session.ses_trans_list) {
+			trans = list_entry(pacer, lstcon_rpc_trans_t,
+					       tas_link);
+
+			CDEBUG(D_NET, "Session closed, wakeup transaction %s\n",
+			       lstcon_rpc_trans_name(trans->tas_opc));
+
+			wake_up(&trans->tas_waitq);
+		}
+
+		mutex_unlock(&console_session.ses_mutex);
+
+		CWARN("Session is shutting down, "
+		      "waiting for termination of transactions\n");
+		cfs_pause(cfs_time_seconds(1));
+
+		mutex_lock(&console_session.ses_mutex);
+	}
+
+	spin_lock(&console_session.ses_rpc_lock);
+
+	lst_wait_until((atomic_read(&console_session.ses_rpc_counter) == 0),
+		       console_session.ses_rpc_lock,
+		       "Network is not accessable or target is down, "
+		       "waiting for %d console RPCs to being recycled\n",
+		       atomic_read(&console_session.ses_rpc_counter));
+
+	list_add(&zlist, &console_session.ses_rpc_freelist);
+	list_del_init(&console_session.ses_rpc_freelist);
+
+	spin_unlock(&console_session.ses_rpc_lock);
+
+	while (!list_empty(&zlist)) {
+		crpc = list_entry(zlist.next, lstcon_rpc_t, crp_link);
+
+		list_del(&crpc->crp_link);
+		LIBCFS_FREE(crpc, sizeof(lstcon_rpc_t));
+	}
+}
+
+int
+lstcon_rpc_module_init(void)
+{
+	INIT_LIST_HEAD(&console_session.ses_ping_timer.stt_list);
+	console_session.ses_ping_timer.stt_func = lstcon_rpc_pinger;
+	console_session.ses_ping_timer.stt_data = &console_session.ses_ping_timer;
+
+	console_session.ses_ping = NULL;
+
+	spin_lock_init(&console_session.ses_rpc_lock);
+	atomic_set(&console_session.ses_rpc_counter, 0);
+	INIT_LIST_HEAD(&console_session.ses_rpc_freelist);
+
+	return 0;
+}
+
+void
+lstcon_rpc_module_fini(void)
+{
+	LASSERT (list_empty(&console_session.ses_rpc_freelist));
+	LASSERT (atomic_read(&console_session.ses_rpc_counter) == 0);
+}