diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 0acc4b2..e31d350 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -2435,17 +2435,20 @@
 	kfree(items);
 }
 
-static iscsi_connh_t
-iscsi_conn_create(iscsi_sessionh_t sessionh, uint32_t conn_idx)
+static struct iscsi_cls_conn *
+iscsi_conn_create(struct Scsi_Host *shost, uint32_t conn_idx)
 {
-	struct iscsi_session *session = iscsi_ptr(sessionh);
-	struct iscsi_conn *conn = NULL;
+	struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+	struct iscsi_conn *conn;
+	struct iscsi_cls_conn *cls_conn;
 
-	conn = kmalloc(sizeof(struct iscsi_conn), GFP_KERNEL);
-	if (conn == NULL)
-		goto conn_alloc_fail;
+	cls_conn = iscsi_create_conn(hostdata_session(shost->hostdata),
+				     conn_idx);
+	if (!cls_conn)
+		return NULL;
+	conn = cls_conn->dd_data;
+
 	memset(conn, 0, sizeof(struct iscsi_conn));
-
 	conn->c_stage = ISCSI_CONN_INITIAL_STAGE;
 	conn->in_progress = IN_PROGRESS_WAIT_HEADER;
 	conn->id = conn_idx;
@@ -2507,7 +2510,7 @@
 	mutex_init(&conn->xmitmutex);
 	init_waitqueue_head(&conn->ehwait);
 
-	return iscsi_handle(conn);
+	return cls_conn;
 
 max_recv_dlenght_alloc_fail:
 	spin_lock_bh(&session->lock);
@@ -2523,15 +2526,14 @@
 writequeue_alloc_fail:
 	kfifo_free(conn->xmitqueue);
 xmitqueue_alloc_fail:
-	kfree(conn);
-conn_alloc_fail:
-	return iscsi_handle(NULL);
+	iscsi_destroy_conn(cls_conn);
+	return NULL;
 }
 
 static void
-iscsi_conn_destroy(iscsi_connh_t connh)
+iscsi_conn_destroy(struct iscsi_cls_conn *cls_conn)
 {
-	struct iscsi_conn *conn = iscsi_ptr(connh);
+	struct iscsi_conn *conn = cls_conn->dd_data;
 	struct iscsi_session *session = conn->session;
 	unsigned long flags;
 
@@ -2626,7 +2628,8 @@
 	kfifo_free(conn->writequeue);
 	kfifo_free(conn->immqueue);
 	kfifo_free(conn->mgmtqueue);
-	kfree(conn);
+
+	iscsi_destroy_conn(cls_conn);
 }
 
 static int
@@ -3257,17 +3260,23 @@
 	.this_id		= -1,
 };
 
-static iscsi_sessionh_t
-iscsi_session_create(uint32_t initial_cmdsn, struct Scsi_Host *host)
+static struct iscsi_transport iscsi_tcp_transport;
+
+static struct Scsi_Host *
+iscsi_session_create(struct scsi_transport_template *scsit,
+		     uint32_t initial_cmdsn)
 {
-	int cmd_i;
+	struct Scsi_Host *shost;
 	struct iscsi_session *session;
+	int cmd_i;
 
-	session = iscsi_hostdata(host->hostdata);
+	shost = iscsi_transport_create_session(scsit, &iscsi_tcp_transport);
+	if (!shost)
+		return NULL; 
+
+	session = iscsi_hostdata(shost->hostdata);
 	memset(session, 0, sizeof(struct iscsi_session));
-
-	session->host = host;
-	session->id = host->host_no;
+	session->host = shost;
 	session->state = ISCSI_STATE_LOGGED_IN;
 	session->mgmtpool_max = ISCSI_MGMT_CMDS_MAX;
 	session->cmds_max = ISCSI_XMIT_CMDS_MAX;
@@ -3311,7 +3320,7 @@
 	if (iscsi_r2tpool_alloc(session))
 		goto r2tpool_alloc_fail;
 
-	return iscsi_handle(session);
+	return shost;
 
 r2tpool_alloc_fail:
 	for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++)
@@ -3321,15 +3330,15 @@
 mgmtpool_alloc_fail:
 	iscsi_pool_free(&session->cmdpool, (void**)session->cmds);
 cmdpool_alloc_fail:
-	return iscsi_handle(NULL);
+	return NULL;
 }
 
 static void
-iscsi_session_destroy(iscsi_sessionh_t sessionh)
+iscsi_session_destroy(struct Scsi_Host *shost)
 {
+	struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
 	int cmd_i;
 	struct iscsi_data_task *dtask, *n;
-	struct iscsi_session *session = iscsi_ptr(sessionh);
 
 	for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) {
 		struct iscsi_cmd_task *ctask = session->cmds[cmd_i];
@@ -3345,6 +3354,8 @@
 	iscsi_r2tpool_free(session);
 	iscsi_pool_free(&session->mgmtpool, (void**)session->mgmt_cmds);
 	iscsi_pool_free(&session->cmdpool, (void**)session->cmds);
+
+	iscsi_transport_destroy_session(shost);
 }
 
 static int
@@ -3493,25 +3504,12 @@
 }
 
 static int
-iscsi_conn_get_param(iscsi_connh_t connh, enum iscsi_param param,
-		     uint32_t *value)
+iscsi_session_get_param(struct Scsi_Host *shost,
+			enum iscsi_param param, uint32_t *value)
 {
-	struct iscsi_conn *conn = iscsi_ptr(connh);
-	struct iscsi_session *session = conn->session;
+	struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
 
 	switch(param) {
-	case ISCSI_PARAM_MAX_RECV_DLENGTH:
-		*value = conn->max_recv_dlength;
-		break;
-	case ISCSI_PARAM_MAX_XMIT_DLENGTH:
-		*value = conn->max_xmit_dlength;
-		break;
-	case ISCSI_PARAM_HDRDGST_EN:
-		*value = conn->hdrdgst_en;
-		break;
-	case ISCSI_PARAM_DATADGST_EN:
-		*value = conn->datadgst_en;
-		break;
 	case ISCSI_PARAM_INITIAL_R2T_EN:
 		*value = session->initial_r2t_en;
 		break;
@@ -3549,6 +3547,31 @@
 	return 0;
 }
 
+static int
+iscsi_conn_get_param(void *data, enum iscsi_param param, uint32_t *value)
+{
+	struct iscsi_conn *conn = data;
+
+	switch(param) {
+	case ISCSI_PARAM_MAX_RECV_DLENGTH:
+		*value = conn->max_recv_dlength;
+		break;
+	case ISCSI_PARAM_MAX_XMIT_DLENGTH:
+		*value = conn->max_xmit_dlength;
+		break;
+	case ISCSI_PARAM_HDRDGST_EN:
+		*value = conn->hdrdgst_en;
+		break;
+	case ISCSI_PARAM_DATADGST_EN:
+		*value = conn->datadgst_en;
+		break;
+	default:
+		return ISCSI_ERR_PARAM_NOT_FOUND;
+	}
+
+	return 0;
+}
+
 static void
 iscsi_conn_get_stats(iscsi_connh_t connh, struct iscsi_stats *stats)
 {
@@ -3593,6 +3616,7 @@
 				  | CAP_DATADGST,
 	.host_template		= &iscsi_sht,
 	.hostdata_size		= sizeof(struct iscsi_session),
+	.conndata_size		= sizeof(struct iscsi_conn),
 	.max_conn		= 1,
 	.max_cmd_len		= ISCSI_TCP_MAX_CMD_LEN,
 	.create_session		= iscsi_session_create,
@@ -3601,7 +3625,8 @@
 	.bind_conn		= iscsi_conn_bind,
 	.destroy_conn		= iscsi_conn_destroy,
 	.set_param		= iscsi_conn_set_param,
-	.get_param		= iscsi_conn_get_param,
+	.get_conn_param		= iscsi_conn_get_param,
+	.get_session_param	= iscsi_session_get_param,
 	.start_conn		= iscsi_conn_start,
 	.stop_conn		= iscsi_conn_stop,
 	.send_pdu		= iscsi_conn_send_pdu,
@@ -3611,8 +3636,6 @@
 static int __init
 iscsi_tcp_init(void)
 {
-	int error;
-
 	if (iscsi_max_lun < 1) {
 		printk(KERN_ERR "Invalid max_lun value of %u\n", iscsi_max_lun);
 		return -EINVAL;
@@ -3625,11 +3648,10 @@
 	if (!taskcache)
 		return -ENOMEM;
 
-	error = iscsi_register_transport(&iscsi_tcp_transport);
-	if (error)
+	if (!iscsi_register_transport(&iscsi_tcp_transport))
 		kmem_cache_destroy(taskcache);
 
-	return error;
+	return 0;
 }
 
 static void __exit
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 50ed88f..45e3163 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -21,12 +21,9 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */
 #include <linux/module.h>
-#include <linux/string.h>
-#include <linux/slab.h>
 #include <linux/mempool.h>
 #include <linux/mutex.h>
 #include <net/tcp.h>
-
 #include <scsi/scsi.h>
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_device.h>
@@ -46,11 +43,6 @@
 	 */
 	struct list_head sessions;
 	/*
-	 * lock to serialize access to the sessions list which must
-	 * be taken after the rx_queue_mutex
-	 */
-	spinlock_t session_lock;
-	/*
 	 * based on transport capabilities, at register time we set these
 	 * bits to tell the transport class it wants attributes displayed
 	 * in sysfs or that it can support different iSCSI Data-Path
@@ -157,7 +149,7 @@
 	spinlock_t freelock;
 };
 
-static struct mempool_zone z_reply;
+static struct mempool_zone *z_reply;
 
 /*
  * Z_MAX_* - actual mempool size allocated at the mempool_zone_init() time
@@ -172,50 +164,270 @@
 #define Z_MAX_ERROR	16
 #define Z_HIWAT_ERROR	12
 
-struct iscsi_if_conn {
-	struct list_head conn_list;	/* item in connlist */
-	struct list_head session_list;	/* item in session->connections */
-	iscsi_connh_t connh;
-	int active;			/* must be accessed with the connlock */
-	struct Scsi_Host *host;		/* originated shost */
-	struct device dev;		/* sysfs transport/container device */
-	struct iscsi_transport *transport;
-	struct mempool_zone z_error;
-	struct mempool_zone z_pdu;
-	struct list_head freequeue;
-};
-
-#define iscsi_dev_to_if_conn(_dev) \
-	container_of(_dev, struct iscsi_if_conn, dev)
-
-#define iscsi_cdev_to_if_conn(_cdev) \
-	iscsi_dev_to_if_conn(_cdev->dev)
-
 static LIST_HEAD(connlist);
 static DEFINE_SPINLOCK(connlock);
 
-struct iscsi_if_session {
-	struct list_head list;	/* item in session_list */
-	struct list_head connections;
-	iscsi_sessionh_t sessionh;
-	struct iscsi_transport *transport;
-	struct device dev;	/* sysfs transport/container device */
-};
+/*
+ * The following functions can be used by LLDs that allocate
+ * their own scsi_hosts or by software iscsi LLDs
+ */
+static void iscsi_session_release(struct device *dev)
+{
+	struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
+	struct iscsi_transport *transport = session->transport;
+	struct Scsi_Host *shost;
 
-#define iscsi_dev_to_if_session(_dev) \
-	container_of(_dev, struct iscsi_if_session, dev)
+	shost = iscsi_session_to_shost(session);
+	scsi_host_put(shost);
+	kfree(session);
+	module_put(transport->owner);
+}
 
-#define iscsi_cdev_to_if_session(_cdev) \
-	iscsi_dev_to_if_session(_cdev->dev)
+static int iscsi_is_session_dev(const struct device *dev)
+{
+	return dev->release == iscsi_session_release;
+}
 
-#define iscsi_if_session_to_shost(_session) \
-	dev_to_shost(_session->dev.parent)
+/**
+ * iscsi_create_session - create iscsi class session
+ * @shost: scsi host
+ * @transport: iscsi transport
+ *
+ * This can be called from a LLD or iscsi_transport
+ **/
+struct iscsi_cls_session *
+iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport)
+{
+	struct iscsi_cls_session *session;
+	int err;
 
-static struct iscsi_if_conn*
+	if (!try_module_get(transport->owner))
+		return NULL;
+
+	session = kzalloc(sizeof(*session), GFP_KERNEL);
+	if (!session)
+		goto module_put;
+	session->transport = transport;
+
+	/* this is released in the dev's release function */
+	scsi_host_get(shost);
+	snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", shost->host_no);
+	session->dev.parent = &shost->shost_gendev;
+	session->dev.release = iscsi_session_release;
+	err = device_register(&session->dev);
+	if (err) {
+		dev_printk(KERN_ERR, &session->dev, "iscsi: could not "
+			   "register session's dev\n");
+		goto free_session;
+	}
+	transport_register_device(&session->dev);
+
+	return session;
+
+free_session:
+	kfree(session);
+module_put:
+	module_put(transport->owner);
+	return NULL;
+}
+
+EXPORT_SYMBOL_GPL(iscsi_create_session);
+
+/**
+ * iscsi_destroy_session - destroy iscsi session
+ * @session: iscsi_session
+ *
+ * Can be called by a LLD or iscsi_transport. There must not be
+ * any running connections.
+ **/
+int iscsi_destroy_session(struct iscsi_cls_session *session)
+{
+	transport_unregister_device(&session->dev);
+	device_unregister(&session->dev);
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(iscsi_destroy_session);
+
+static void iscsi_conn_release(struct device *dev)
+{
+	struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
+	struct device *parent = conn->dev.parent;
+
+	kfree(conn);
+	put_device(parent);
+}
+
+static int iscsi_is_conn_dev(const struct device *dev)
+{
+	return dev->release == iscsi_conn_release;
+}
+
+/**
+ * iscsi_create_conn - create iscsi class connection
+ * @session: iscsi cls session
+ * @cid: connection id
+ *
+ * This can be called from a LLD or iscsi_transport. The connection
+ * is child of the session so cid must be unique for all connections
+ * on the session.
+ **/
+struct iscsi_cls_conn *
+iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid)
+{
+	struct iscsi_transport *transport = session->transport;
+	struct Scsi_Host *shost = iscsi_session_to_shost(session);
+	struct iscsi_cls_conn *conn;
+	int err;
+
+	conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL);
+	if (!conn)
+		return NULL;
+
+	if (transport->conndata_size)
+		conn->dd_data = &conn[1];
+
+	INIT_LIST_HEAD(&conn->conn_list);
+	conn->transport = transport;
+
+	/* this is released in the dev's release function */
+	if (!get_device(&session->dev))
+		goto free_conn;
+	snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u",
+		 shost->host_no, cid);
+	conn->dev.parent = &session->dev;
+	conn->dev.release = iscsi_conn_release;
+	err = device_register(&conn->dev);
+	if (err) {
+		dev_printk(KERN_ERR, &conn->dev, "iscsi: could not register "
+			   "connection's dev\n");
+		goto release_parent_ref;
+	}
+	transport_register_device(&conn->dev);
+	return conn;
+
+release_parent_ref:
+	put_device(&session->dev);
+free_conn:
+	kfree(conn);
+	return NULL;
+}
+
+EXPORT_SYMBOL_GPL(iscsi_create_conn);
+
+/**
+ * iscsi_destroy_conn - destroy iscsi class connection
+ * @session: iscsi cls session
+ *
+ * This can be called from a LLD or iscsi_transport.
+ **/
+int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
+{
+	transport_unregister_device(&conn->dev);
+	device_unregister(&conn->dev);
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
+
+/*
+ * These functions are used only by software iscsi_transports
+ * which do not allocate and more their scsi_hosts since this
+ * is initiated from userspace.
+ */
+
+/*
+ * iSCSI Session's hostdata organization:
+ *
+ *    *------------------* <== hostdata_session(host->hostdata)
+ *    | ptr to class sess|
+ *    |------------------| <== iscsi_hostdata(host->hostdata)
+ *    | transport's data |
+ *    *------------------*
+ */
+
+#define hostdata_privsize(_t)	(sizeof(unsigned long) + _t->hostdata_size + \
+				 _t->hostdata_size % sizeof(unsigned long))
+
+#define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))
+
+/**
+ * iscsi_transport_create_session - create iscsi cls session and host
+ * scsit: scsi transport template
+ * transport: iscsi transport template
+ *
+ * This can be used by software iscsi_transports that allocate
+ * a session per scsi host.
+ **/
+struct Scsi_Host *
+iscsi_transport_create_session(struct scsi_transport_template *scsit,
+			       struct iscsi_transport *transport)
+{
+	struct iscsi_cls_session *session;
+	struct Scsi_Host *shost;
+
+	shost = scsi_host_alloc(transport->host_template,
+				hostdata_privsize(transport));
+	if (!shost) {
+		printk(KERN_ERR "iscsi: can not allocate SCSI host for "
+			"session\n");
+		return NULL;
+	}
+
+	shost->max_id = 1;
+	shost->max_channel = 0;
+	shost->max_lun = transport->max_lun;
+	shost->max_cmd_len = transport->max_cmd_len;
+	shost->transportt = scsit;
+
+	if (scsi_add_host(shost, NULL))
+		goto free_host;
+
+	session = iscsi_create_session(shost, transport);
+	if (!session)
+		goto remove_host;
+
+	*(unsigned long*)shost->hostdata = (unsigned long)session;
+	return shost;
+
+remove_host:
+	scsi_remove_host(shost);
+free_host:
+	scsi_host_put(shost);
+	return NULL;
+}
+
+EXPORT_SYMBOL_GPL(iscsi_transport_create_session);
+
+/**
+ * iscsi_transport_destroy_session - destroy session and scsi host
+ * shost: scsi host
+ *
+ * This can be used by software iscsi_transports that allocate
+ * a session per scsi host.
+ **/
+int iscsi_transport_destroy_session(struct Scsi_Host *shost)
+{
+	struct iscsi_cls_session *session;
+
+	scsi_remove_host(shost);
+	session = hostdata_session(shost->hostdata);
+	iscsi_destroy_session(session);
+	/* ref from host alloc */
+	scsi_host_put(shost);
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(iscsi_transport_destroy_session);
+
+/*
+ * iscsi interface functions
+ */
+static struct iscsi_cls_conn*
 iscsi_if_find_conn(uint64_t key)
 {
 	unsigned long flags;
-	struct iscsi_if_conn *conn;
+	struct iscsi_cls_conn *conn;
 
 	spin_lock_irqsave(&connlock, flags);
 	list_for_each_entry(conn, &connlist, conn_list)
@@ -250,7 +462,7 @@
 }
 
 static void*
-mempool_zone_alloc_skb(gfp_t gfp_mask, void *pool_data)
+mempool_zone_alloc_skb(unsigned int gfp_mask, void *pool_data)
 {
 	struct mempool_zone *zone = pool_data;
 
@@ -282,14 +494,21 @@
 	spin_unlock_irqrestore(&zone->freelock, flags);
 }
 
-static int
-mempool_zone_init(struct mempool_zone *zp, unsigned max, unsigned size,
-		unsigned hiwat)
+static struct mempool_zone *
+mempool_zone_init(unsigned max, unsigned size, unsigned hiwat)
 {
+	struct mempool_zone *zp;
+
+	zp = kzalloc(sizeof(*zp), GFP_KERNEL);
+	if (!zp)
+		return NULL;
+
 	zp->pool = mempool_create(max, mempool_zone_alloc_skb,
 				  mempool_zone_free_skb, zp);
-	if (!zp->pool)
-		return -ENOMEM;
+	if (!zp->pool) {
+		kfree(zp);
+		return NULL;
+	}
 
 	zp->size = size;
 	zp->hiwat = hiwat;
@@ -298,9 +517,14 @@
 	spin_lock_init(&zp->freelock);
 	atomic_set(&zp->allocated, 0);
 
-	return 0;
+	return zp;
 }
 
+static void mempool_zone_destroy(struct mempool_zone *zp)
+{
+	mempool_destroy(zp->pool);
+	kfree(zp);
+}
 
 static struct sk_buff*
 mempool_zone_get_skb(struct mempool_zone *zone)
@@ -340,7 +564,7 @@
 	struct nlmsghdr	*nlh;
 	struct sk_buff *skb;
 	struct iscsi_uevent *ev;
-	struct iscsi_if_conn *conn;
+	struct iscsi_cls_conn *conn;
 	char *pdu;
 	int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) +
 			      data_size);
@@ -348,13 +572,13 @@
 	conn = iscsi_if_find_conn(connh);
 	BUG_ON(!conn);
 
-	mempool_zone_complete(&conn->z_pdu);
+	mempool_zone_complete(conn->z_pdu);
 
-	skb = mempool_zone_get_skb(&conn->z_pdu);
+	skb = mempool_zone_get_skb(conn->z_pdu);
 	if (!skb) {
 		iscsi_conn_error(connh, ISCSI_ERR_CONN_FAILED);
-		printk(KERN_ERR "iscsi%d: can not deliver control PDU: OOM\n",
-		       conn->host->host_no);
+		dev_printk(KERN_ERR, &conn->dev, "iscsi: can not deliver "
+			   "control PDU: OOM\n");
 		return -ENOMEM;
 	}
 
@@ -363,14 +587,14 @@
 	memset(ev, 0, sizeof(*ev));
 	ev->transport_handle = iscsi_handle(conn->transport);
 	ev->type = ISCSI_KEVENT_RECV_PDU;
-	if (atomic_read(&conn->z_pdu.allocated) >= conn->z_pdu.hiwat)
+	if (atomic_read(&conn->z_pdu->allocated) >= conn->z_pdu->hiwat)
 		ev->iferror = -ENOMEM;
 	ev->r.recv_req.conn_handle = connh;
 	pdu = (char*)ev + sizeof(*ev);
 	memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
 	memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
 
-	return iscsi_unicast_skb(&conn->z_pdu, skb);
+	return iscsi_unicast_skb(conn->z_pdu, skb);
 }
 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
 
@@ -379,18 +603,18 @@
 	struct nlmsghdr	*nlh;
 	struct sk_buff	*skb;
 	struct iscsi_uevent *ev;
-	struct iscsi_if_conn *conn;
+	struct iscsi_cls_conn *conn;
 	int len = NLMSG_SPACE(sizeof(*ev));
 
 	conn = iscsi_if_find_conn(connh);
 	BUG_ON(!conn);
 
-	mempool_zone_complete(&conn->z_error);
+	mempool_zone_complete(conn->z_error);
 
-	skb = mempool_zone_get_skb(&conn->z_error);
+	skb = mempool_zone_get_skb(conn->z_error);
 	if (!skb) {
-		printk(KERN_ERR "iscsi%d: gracefully ignored conn error (%d)\n",
-		       conn->host->host_no, error);
+		dev_printk(KERN_ERR, &conn->dev, "iscsi: gracefully ignored "
+			  "conn error (%d)\n", error);
 		return;
 	}
 
@@ -398,15 +622,15 @@
 	ev = NLMSG_DATA(nlh);
 	ev->transport_handle = iscsi_handle(conn->transport);
 	ev->type = ISCSI_KEVENT_CONN_ERROR;
-	if (atomic_read(&conn->z_error.allocated) >= conn->z_error.hiwat)
+	if (atomic_read(&conn->z_error->allocated) >= conn->z_error->hiwat)
 		ev->iferror = -ENOMEM;
 	ev->r.connerror.error = error;
 	ev->r.connerror.conn_handle = connh;
 
-	iscsi_unicast_skb(&conn->z_error, skb);
+	iscsi_unicast_skb(conn->z_error, skb);
 
-	printk(KERN_INFO "iscsi%d: detected conn error (%d)\n",
-	       conn->host->host_no, error);
+	dev_printk(KERN_INFO, &conn->dev, "iscsi: detected conn error (%d)\n",
+		   error);
 }
 EXPORT_SYMBOL_GPL(iscsi_conn_error);
 
@@ -420,9 +644,9 @@
 	int flags = multi ? NLM_F_MULTI : 0;
 	int t = done ? NLMSG_DONE : type;
 
-	mempool_zone_complete(&z_reply);
+	mempool_zone_complete(z_reply);
 
-	skb = mempool_zone_get_skb(&z_reply);
+	skb = mempool_zone_get_skb(z_reply);
 	/*
 	 * FIXME:
 	 * user is supposed to react on iferror == -ENOMEM;
@@ -433,304 +657,7 @@
 	nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0);
 	nlh->nlmsg_flags = flags;
 	memcpy(NLMSG_DATA(nlh), payload, size);
-	return iscsi_unicast_skb(&z_reply, skb);
-}
-
-/*
- * iSCSI Session's hostdata organization:
- *
- *    *------------------* <== host->hostdata
- *    | transport        |
- *    |------------------| <== iscsi_hostdata(host->hostdata)
- *    | transport's data |
- *    |------------------| <== hostdata_session(host->hostdata)
- *    | interface's data |
- *    *------------------*
- */
-
-#define hostdata_privsize(_t)	(sizeof(unsigned long) + _t->hostdata_size + \
-				 _t->hostdata_size % sizeof(unsigned long) + \
-				 sizeof(struct iscsi_if_session))
-
-#define hostdata_session(_hostdata) ((void*)_hostdata + sizeof(unsigned long) + \
-			((struct iscsi_transport *) \
-			 iscsi_ptr(*(uint64_t *)_hostdata))->hostdata_size)
-
-static void iscsi_if_session_dev_release(struct device *dev)
-{
-	struct iscsi_if_session *session = iscsi_dev_to_if_session(dev);
-	struct iscsi_transport *transport = session->transport;
-	struct Scsi_Host *shost = iscsi_if_session_to_shost(session);
-	struct iscsi_if_conn *conn, *tmp;
-	unsigned long flags;
-
-	/* now free connections */
-	spin_lock_irqsave(&connlock, flags);
-	list_for_each_entry_safe(conn, tmp, &session->connections,
-				 session_list) {
-		list_del(&conn->session_list);
-		mempool_destroy(conn->z_pdu.pool);
-		mempool_destroy(conn->z_error.pool);
-		kfree(conn);
-	}
-	spin_unlock_irqrestore(&connlock, flags);
-	scsi_host_put(shost);
-	module_put(transport->owner);
-}
-
-static int
-iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev)
-{
-	struct iscsi_transport *transport = priv->iscsi_transport;
-	struct iscsi_if_session *session;
-	struct Scsi_Host *shost;
-	unsigned long flags;
-	int error;
-
-	if (!try_module_get(transport->owner))
-		return -EPERM;
-
-	shost = scsi_host_alloc(transport->host_template,
-				hostdata_privsize(transport));
-	if (!shost) {
-		ev->r.c_session_ret.session_handle = iscsi_handle(NULL);
-		printk(KERN_ERR "iscsi: can not allocate SCSI host for "
-		       "session\n");
-		error = -ENOMEM;
-		goto out_module_put;
-	}
-	shost->max_id = 1;
-	shost->max_channel = 0;
-	shost->max_lun = transport->max_lun;
-	shost->max_cmd_len = transport->max_cmd_len;
-	shost->transportt = &priv->t;
-
-	/* store struct iscsi_transport in hostdata */
-	*(uint64_t*)shost->hostdata = ev->transport_handle;
-
-	ev->r.c_session_ret.session_handle = transport->create_session(
-					ev->u.c_session.initial_cmdsn, shost);
-	if (ev->r.c_session_ret.session_handle == iscsi_handle(NULL)) {
-		error = 0;
-		goto out_host_put;
-	}
-
-	/* host_no becomes assigned SID */
-	ev->r.c_session_ret.sid = shost->host_no;
-	/* initialize session */
-	session = hostdata_session(shost->hostdata);
-	INIT_LIST_HEAD(&session->connections);
-	INIT_LIST_HEAD(&session->list);
-	session->sessionh = ev->r.c_session_ret.session_handle;
-	session->transport = transport;
-
-	error = scsi_add_host(shost, NULL);
-	if (error)
-		goto out_destroy_session;
-
-	/*
-	 * this is released in the dev's release function)
-	 */
-	scsi_host_get(shost);
-	snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", shost->host_no);
-	session->dev.parent = &shost->shost_gendev;
-	session->dev.release = iscsi_if_session_dev_release;
-	error = device_register(&session->dev);
-	if (error) {
-		printk(KERN_ERR "iscsi: could not register session%d's dev\n",
-		       shost->host_no);
-		goto out_remove_host;
-	}
-	transport_register_device(&session->dev);
-
-	/* add this session to the list of active sessions */
-	spin_lock_irqsave(&priv->session_lock, flags);
-	list_add(&session->list, &priv->sessions);
-	spin_unlock_irqrestore(&priv->session_lock, flags);
-
-	return 0;
-
-out_remove_host:
-	scsi_remove_host(shost);
-out_destroy_session:
-	transport->destroy_session(ev->r.c_session_ret.session_handle);
-	ev->r.c_session_ret.session_handle = iscsi_handle(NULL);
-out_host_put:
-	scsi_host_put(shost);
-out_module_put:
-	module_put(transport->owner);
-	return error;
-}
-
-static int
-iscsi_if_destroy_session(struct iscsi_internal *priv, struct iscsi_uevent *ev)
-{
-	struct iscsi_transport *transport = priv->iscsi_transport;
-	struct Scsi_Host *shost;
-	struct iscsi_if_session *session;
-	unsigned long flags;
-	struct iscsi_if_conn *conn;
-	int error = 0;
-
-	shost = scsi_host_lookup(ev->u.d_session.sid);
-	if (shost == ERR_PTR(-ENXIO))
-		return -EEXIST;
-	session = hostdata_session(shost->hostdata);
-
-	/* check if we have active connections */
-	spin_lock_irqsave(&connlock, flags);
-	list_for_each_entry(conn, &session->connections, session_list) {
-		if (conn->active) {
-			printk(KERN_ERR "iscsi%d: can not destroy session: "
-			       "has active connection (%p)\n",
-			       shost->host_no, iscsi_ptr(conn->connh));
-			spin_unlock_irqrestore(&connlock, flags);
-			error = EIO;
-			goto out_release_ref;
-		}
-	}
-	spin_unlock_irqrestore(&connlock, flags);
-
-	scsi_remove_host(shost);
-	transport->destroy_session(ev->u.d_session.session_handle);
-	transport_unregister_device(&session->dev);
-	device_unregister(&session->dev);
-
-	/* remove this session from the list of active sessions */
-	spin_lock_irqsave(&priv->session_lock, flags);
-	list_del(&session->list);
-	spin_unlock_irqrestore(&priv->session_lock, flags);
-
-	/* ref from host alloc */
-	scsi_host_put(shost);
-out_release_ref:
-	/* ref from host lookup */
-	scsi_host_put(shost);
-	return error;
-}
-
-static void iscsi_if_conn_dev_release(struct device *dev)
-{
-	struct iscsi_if_conn *conn = iscsi_dev_to_if_conn(dev);
-	struct Scsi_Host *shost = conn->host;
-
-	scsi_host_put(shost);
-}
-
-static int
-iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
-{
-	struct iscsi_if_session *session;
-	struct Scsi_Host *shost;
-	struct iscsi_if_conn *conn;
-	unsigned long flags;
-	int error;
-
-	shost = scsi_host_lookup(ev->u.c_conn.sid);
-	if (shost == ERR_PTR(-ENXIO))
-		return -EEXIST;
-	session = hostdata_session(shost->hostdata);
-
-	conn = kmalloc(sizeof(struct iscsi_if_conn), GFP_KERNEL);
-	if (!conn) {
-		error = -ENOMEM;
-		goto out_release_ref;
-	}
-	memset(conn, 0, sizeof(struct iscsi_if_conn));
-	INIT_LIST_HEAD(&conn->session_list);
-	INIT_LIST_HEAD(&conn->conn_list);
-	conn->host = shost;
-	conn->transport = transport;
-
-	error = mempool_zone_init(&conn->z_pdu, Z_MAX_PDU,
-			NLMSG_SPACE(sizeof(struct iscsi_uevent) +
-				    sizeof(struct iscsi_hdr) +
-				    DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH),
-			Z_HIWAT_PDU);
-	if (error) {
-		printk(KERN_ERR "iscsi%d: can not allocate pdu zone for new "
-		       "conn\n", shost->host_no);
-		goto out_free_conn;
-	}
-	error = mempool_zone_init(&conn->z_error, Z_MAX_ERROR,
-			NLMSG_SPACE(sizeof(struct iscsi_uevent)),
-			Z_HIWAT_ERROR);
-	if (error) {
-		printk(KERN_ERR "iscsi%d: can not allocate error zone for "
-		       "new conn\n", shost->host_no);
-		goto out_free_pdu_pool;
-	}
-
-	ev->r.handle = transport->create_conn(ev->u.c_conn.session_handle,
-					ev->u.c_conn.cid);
-	if (!ev->r.handle) {
-		error = -ENODEV;
-		goto out_free_error_pool;
-	}
-
-	conn->connh = ev->r.handle;
-
-	/*
-	 * this is released in the dev's release function
-	 */
-	if (!scsi_host_get(shost))
-		goto out_destroy_conn;
-	snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u",
-		 shost->host_no, ev->u.c_conn.cid);
-	conn->dev.parent = &session->dev;
-	conn->dev.release = iscsi_if_conn_dev_release;
-	error = device_register(&conn->dev);
-	if (error) {
-		printk(KERN_ERR "iscsi%d: could not register connections%u "
-		       "dev\n", shost->host_no, ev->u.c_conn.cid);
-		goto out_release_parent_ref;
-	}
-	transport_register_device(&conn->dev);
-
-	spin_lock_irqsave(&connlock, flags);
-	list_add(&conn->conn_list, &connlist);
-	list_add(&conn->session_list, &session->connections);
-	conn->active = 1;
-	spin_unlock_irqrestore(&connlock, flags);
-
-	scsi_host_put(shost);
-	return 0;
-
-out_release_parent_ref:
-	scsi_host_put(shost);
-out_destroy_conn:
-	transport->destroy_conn(ev->r.handle);
-out_free_error_pool:
-	mempool_destroy(conn->z_error.pool);
-out_free_pdu_pool:
-	mempool_destroy(conn->z_pdu.pool);
-out_free_conn:
-	kfree(conn);
-out_release_ref:
-	scsi_host_put(shost);
-	return error;
-}
-
-static int
-iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
-{
-	unsigned long flags;
-	struct iscsi_if_conn *conn;
-
-	conn = iscsi_if_find_conn(ev->u.d_conn.conn_handle);
-	if (!conn)
-		return -EEXIST;
-
-	transport->destroy_conn(ev->u.d_conn.conn_handle);
-
-	spin_lock_irqsave(&connlock, flags);
-	conn->active = 0;
-	list_del(&conn->conn_list);
-	spin_unlock_irqrestore(&connlock, flags);
-
-	transport_unregister_device(&conn->dev);
-	device_unregister(&conn->dev);
-	return 0;
+	return iscsi_unicast_skb(z_reply, skb);
 }
 
 static int
@@ -740,7 +667,7 @@
 	struct iscsi_uevent *ev = NLMSG_DATA(nlh);
 	struct iscsi_stats *stats;
 	struct sk_buff *skbstat;
-	struct iscsi_if_conn *conn;
+	struct iscsi_cls_conn *conn;
 	struct nlmsghdr	*nlhstat;
 	struct iscsi_uevent *evstat;
 	int len = NLMSG_SPACE(sizeof(*ev) +
@@ -756,12 +683,12 @@
 	do {
 		int actual_size;
 
-		mempool_zone_complete(&conn->z_pdu);
+		mempool_zone_complete(conn->z_pdu);
 
-		skbstat = mempool_zone_get_skb(&conn->z_pdu);
+		skbstat = mempool_zone_get_skb(conn->z_pdu);
 		if (!skbstat) {
-			printk(KERN_ERR "iscsi%d: can not deliver stats: OOM\n",
-			       conn->host->host_no);
+			dev_printk(KERN_ERR, &conn->dev, "iscsi: can not "
+				   "deliver stats: OOM\n");
 			return -ENOMEM;
 		}
 
@@ -771,7 +698,7 @@
 		memset(evstat, 0, sizeof(*evstat));
 		evstat->transport_handle = iscsi_handle(conn->transport);
 		evstat->type = nlh->nlmsg_type;
-		if (atomic_read(&conn->z_pdu.allocated) >= conn->z_pdu.hiwat)
+		if (atomic_read(&conn->z_pdu->allocated) >= conn->z_pdu->hiwat)
 			evstat->iferror = -ENOMEM;
 		evstat->u.get_stats.conn_handle =
 			ev->u.get_stats.conn_handle;
@@ -789,13 +716,141 @@
 		skb_trim(skb, NLMSG_ALIGN(actual_size));
 		nlhstat->nlmsg_len = actual_size;
 
-		err = iscsi_unicast_skb(&conn->z_pdu, skbstat);
+		err = iscsi_unicast_skb(conn->z_pdu, skbstat);
 	} while (err < 0 && err != -ECONNREFUSED);
 
 	return err;
 }
 
 static int
+iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev)
+{
+	struct iscsi_transport *transport = priv->iscsi_transport;
+	struct Scsi_Host *shost;
+
+	if (!transport->create_session)
+		return -EINVAL;
+
+	shost = transport->create_session(&priv->t,
+					  ev->u.c_session.initial_cmdsn);
+	if (!shost)
+		return -ENOMEM;
+
+	ev->r.c_session_ret.session_handle = iscsi_handle(iscsi_hostdata(shost->hostdata));
+	ev->r.c_session_ret.sid = shost->host_no;
+	return 0;
+}
+
+static int
+iscsi_if_destroy_session(struct iscsi_internal *priv, struct iscsi_uevent *ev)
+{
+	struct iscsi_transport *transport = priv->iscsi_transport;
+
+	struct Scsi_Host *shost;
+
+	if (!transport->destroy_session)
+		return -EINVAL;
+
+	shost = scsi_host_lookup(ev->u.d_session.sid);
+	if (shost == ERR_PTR(-ENXIO))
+		return -EEXIST;
+
+	if (transport->destroy_session)
+		transport->destroy_session(shost);
+        /* ref from host lookup */
+        scsi_host_put(shost);
+	return 0;
+}
+
+static int
+iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev){
+	struct Scsi_Host *shost;
+	struct iscsi_cls_conn *conn;
+	unsigned long flags;
+
+	if (!transport->create_conn)
+		return -EINVAL;
+
+	shost = scsi_host_lookup(ev->u.c_conn.sid);
+	if (shost == ERR_PTR(-ENXIO))
+		return -EEXIST;
+
+	conn = transport->create_conn(shost, ev->u.c_conn.cid);
+	if (!conn)
+		goto release_ref;
+
+	conn->z_pdu = mempool_zone_init(Z_MAX_PDU,
+			NLMSG_SPACE(sizeof(struct iscsi_uevent) +
+				    sizeof(struct iscsi_hdr) +
+				    DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH),
+			Z_HIWAT_PDU);
+	if (!conn->z_pdu) {
+		dev_printk(KERN_ERR, &conn->dev, "iscsi: can not allocate "
+			   "pdu zone for new conn\n");
+		goto destroy_conn;
+	}
+
+	conn->z_error = mempool_zone_init(Z_MAX_ERROR,
+			NLMSG_SPACE(sizeof(struct iscsi_uevent)),
+			Z_HIWAT_ERROR);
+	if (!conn->z_error) {
+		dev_printk(KERN_ERR, &conn->dev, "iscsi: can not allocate "
+			   "error zone for new conn\n");
+		goto free_pdu_pool;
+	}
+
+	ev->r.handle = conn->connh = iscsi_handle(conn->dd_data);
+
+	spin_lock_irqsave(&connlock, flags);
+	list_add(&conn->conn_list, &connlist);
+	conn->active = 1;
+	spin_unlock_irqrestore(&connlock, flags);
+
+	scsi_host_put(shost);
+	return 0;
+
+free_pdu_pool:
+	mempool_zone_destroy(conn->z_pdu);
+destroy_conn:
+	if (transport->destroy_conn)
+		transport->destroy_conn(conn->dd_data);
+release_ref:
+	scsi_host_put(shost);
+	return -ENOMEM;
+}
+
+static int
+iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
+{
+	unsigned long flags;
+	struct iscsi_cls_conn *conn;
+	struct mempool_zone *z_error, *z_pdu;
+
+	conn = iscsi_if_find_conn(ev->u.d_conn.conn_handle);
+	if (!conn)
+		return -EEXIST;
+
+	if (!transport->destroy_conn)
+		return -EINVAL;
+
+	spin_lock_irqsave(&connlock, flags);
+	conn->active = 0;
+	list_del(&conn->conn_list);
+	spin_unlock_irqrestore(&connlock, flags);
+
+	z_pdu = conn->z_pdu;
+	z_error = conn->z_error;
+
+	if (transport->destroy_conn)
+		transport->destroy_conn(conn);
+
+	mempool_zone_destroy(z_pdu);
+	mempool_zone_destroy(z_error);
+
+	return 0;
+}
+
+static int
 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 {
 	int err = 0;
@@ -916,8 +971,8 @@
 				err = iscsi_if_send_reply(
 					NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq,
 					nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
-				if (atomic_read(&z_reply.allocated) >=
-						z_reply.hiwat)
+				if (atomic_read(&z_reply->allocated) >=
+						z_reply->hiwat)
 					ev->iferror = -ENOMEM;
 			} while (err < 0 && err != -ECONNREFUSED);
 			skb_pull(skb, rlen);
@@ -927,6 +982,9 @@
 	mutex_unlock(&rx_queue_mutex);
 }
 
+#define iscsi_cdev_to_conn(_cdev) \
+	iscsi_dev_to_conn(_cdev->dev)
+
 /*
  * iSCSI connection attrs
  */
@@ -935,12 +993,10 @@
 show_conn_int_param_##param(struct class_device *cdev, char *buf)	\
 {									\
 	uint32_t value = 0;						\
-	struct iscsi_if_conn *conn = iscsi_cdev_to_if_conn(cdev);	\
-	struct iscsi_internal *priv;					\
+	struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev);		\
+	struct iscsi_transport *t = conn->transport;			\
 									\
-	priv = to_iscsi_internal(conn->host->transportt);		\
-	if (priv->param_mask & (1 << param))				\
-		priv->iscsi_transport->get_param(conn->connh, param, &value); \
+	t->get_conn_param(conn->dd_data, param, &value);		\
 	return snprintf(buf, 20, format"\n", value);			\
 }
 
@@ -955,6 +1011,9 @@
 iscsi_conn_int_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN, "%d");
 iscsi_conn_int_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN, "%d");
 
+#define iscsi_cdev_to_session(_cdev) \
+	iscsi_dev_to_session(_cdev->dev)
+
 /*
  * iSCSI session attrs
  */
@@ -963,20 +1022,11 @@
 show_session_int_param_##param(struct class_device *cdev, char *buf)	\
 {									\
 	uint32_t value = 0;						\
-	struct iscsi_if_session *session = iscsi_cdev_to_if_session(cdev); \
-	struct Scsi_Host *shost = iscsi_if_session_to_shost(session);	\
-	struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
-	struct iscsi_if_conn *conn = NULL;				\
-	unsigned long  flags;						\
+	struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev);	\
+	struct Scsi_Host *shost = iscsi_session_to_shost(session);	\
+	struct iscsi_transport *t = session->transport;			\
 									\
-	spin_lock_irqsave(&connlock, flags);				\
-	if (!list_empty(&session->connections))				\
-		conn = list_entry(session->connections.next,		\
-				  struct iscsi_if_conn, session_list);	\
-	spin_unlock_irqrestore(&connlock, flags);			\
-									\
-	if (conn && (priv->param_mask & (1 << param)))			\
-		priv->iscsi_transport->get_param(conn->connh, param, &value);\
+	t->get_session_param(shost, param, &value);			\
 	return snprintf(buf, 20, format"\n", value);			\
 }
 
@@ -1005,23 +1055,18 @@
 		count++;						\
 	}
 
-static int iscsi_is_session_dev(const struct device *dev)
-{
-	return dev->release == iscsi_if_session_dev_release;
-}
-
 static int iscsi_session_match(struct attribute_container *cont,
 			   struct device *dev)
 {
-	struct iscsi_if_session *session;
+	struct iscsi_cls_session *session;
 	struct Scsi_Host *shost;
 	struct iscsi_internal *priv;
 
 	if (!iscsi_is_session_dev(dev))
 		return 0;
 
-	session = iscsi_dev_to_if_session(dev);
-	shost = iscsi_if_session_to_shost(session);
+	session = iscsi_dev_to_session(dev);
+	shost = iscsi_session_to_shost(session);
 	if (!shost->transportt)
 		return 0;
 
@@ -1032,23 +1077,21 @@
 	return &priv->session_cont.ac == cont;
 }
 
-static int iscsi_is_conn_dev(const struct device *dev)
-{
-	return dev->release == iscsi_if_conn_dev_release;
-}
-
 static int iscsi_conn_match(struct attribute_container *cont,
 			   struct device *dev)
 {
-	struct iscsi_if_conn *conn;
+	struct iscsi_cls_session *session;
+	struct iscsi_cls_conn *conn;
 	struct Scsi_Host *shost;
 	struct iscsi_internal *priv;
 
 	if (!iscsi_is_conn_dev(dev))
 		return 0;
 
-	conn = iscsi_dev_to_if_conn(dev);
-	shost = conn->host;
+	conn = iscsi_dev_to_conn(dev);
+	session = iscsi_dev_to_session(conn->dev.parent);
+	shost = iscsi_session_to_shost(session);
+
 	if (!shost->transportt)
 		return 0;
 
@@ -1059,7 +1102,8 @@
 	return &priv->conn_cont.ac == cont;
 }
 
-int iscsi_register_transport(struct iscsi_transport *tt)
+struct scsi_transport_template *
+iscsi_register_transport(struct iscsi_transport *tt)
 {
 	struct iscsi_internal *priv;
 	unsigned long flags;
@@ -1069,15 +1113,14 @@
 
 	priv = iscsi_if_transport_lookup(tt);
 	if (priv)
-		return -EEXIST;
+		return NULL;
 
 	priv = kmalloc(sizeof(*priv), GFP_KERNEL);
 	if (!priv)
-		return -ENOMEM;
+		return NULL;
 	memset(priv, 0, sizeof(*priv));
 	INIT_LIST_HEAD(&priv->list);
 	INIT_LIST_HEAD(&priv->sessions);
-	spin_lock_init(&priv->session_lock);
 	priv->iscsi_transport = tt;
 
 	priv->cdev.class = &iscsi_transport_class;
@@ -1143,13 +1186,13 @@
 	spin_unlock_irqrestore(&iscsi_transport_lock, flags);
 
 	printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
-	return 0;
+	return &priv->t;
 
 unregister_cdev:
 	class_device_unregister(&priv->cdev);
 free_priv:
 	kfree(priv);
-	return err;
+	return NULL;
 }
 EXPORT_SYMBOL_GPL(iscsi_register_transport);
 
@@ -1165,14 +1208,6 @@
 	priv = iscsi_if_transport_lookup(tt);
 	BUG_ON (!priv);
 
-	spin_lock_irqsave(&priv->session_lock, flags);
-	if (!list_empty(&priv->sessions)) {
-		spin_unlock_irqrestore(&priv->session_lock, flags);
-		mutex_unlock(&rx_queue_mutex);
-		return -EPERM;
-	}
-	spin_unlock_irqrestore(&priv->session_lock, flags);
-
 	spin_lock_irqsave(&iscsi_transport_lock, flags);
 	list_del(&priv->list);
 	spin_unlock_irqrestore(&iscsi_transport_lock, flags);
@@ -1195,14 +1230,14 @@
 
 	if (event == NETLINK_URELEASE &&
 	    n->protocol == NETLINK_ISCSI && n->pid) {
-		struct iscsi_if_conn *conn;
+		struct iscsi_cls_conn *conn;
 		unsigned long flags;
 
-		mempool_zone_complete(&z_reply);
+		mempool_zone_complete(z_reply);
 		spin_lock_irqsave(&connlock, flags);
 		list_for_each_entry(conn, &connlist, conn_list) {
-			mempool_zone_complete(&conn->z_error);
-			mempool_zone_complete(&conn->z_pdu);
+			mempool_zone_complete(conn->z_error);
+			mempool_zone_complete(conn->z_pdu);
 		}
 		spin_unlock_irqrestore(&connlock, flags);
 	}
@@ -1235,15 +1270,15 @@
 		goto unregister_session_class;
 
 	nls = netlink_kernel_create(NETLINK_ISCSI, 1, iscsi_if_rx,
-				    THIS_MODULE);
+			THIS_MODULE);
 	if (!nls) {
 		err = -ENOBUFS;
 		goto unregister_notifier;
 	}
 
-	err = mempool_zone_init(&z_reply, Z_MAX_REPLY,
+	z_reply = mempool_zone_init(Z_MAX_REPLY,
 		NLMSG_SPACE(sizeof(struct iscsi_uevent)), Z_HIWAT_REPLY);
-	if (!err)
+	if (z_reply)
 		return 0;
 
 	sock_release(nls->sk_socket);
@@ -1260,7 +1295,7 @@
 
 static void __exit iscsi_transport_exit(void)
 {
-	mempool_destroy(z_reply.pool);
+	mempool_zone_destroy(z_reply);
 	sock_release(nls->sk_socket);
 	netlink_unregister_notifier(&iscsi_nl_notifier);
 	transport_class_unregister(&iscsi_connection_class);
diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index be1bc79..3e5cb5a 100644
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -168,6 +168,12 @@
 
 #define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
 #define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
+#define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))
+
+/**
+ * iscsi_hostdata - get LLD hostdata from scsi_host
+ * @_hostdata: pointer to scsi host's hostdata
+ **/
 #define iscsi_hostdata(_hostdata) ((void*)_hostdata + sizeof(unsigned long))
 
 /*
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index f25041c..16602a5 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -23,8 +23,14 @@
 #ifndef SCSI_TRANSPORT_ISCSI_H
 #define SCSI_TRANSPORT_ISCSI_H
 
+#include <linux/device.h>
 #include <scsi/iscsi_if.h>
 
+struct scsi_transport_template;
+struct Scsi_Host;
+struct mempool_zone;
+struct iscsi_cls_conn;
+
 /**
  * struct iscsi_transport - iSCSI Transport template
  *
@@ -48,23 +54,31 @@
 	char *name;
 	unsigned int caps;
 	struct scsi_host_template *host_template;
+	/* LLD session/scsi_host data size */
 	int hostdata_size;
+	/* LLD iscsi_host data size */
+	int ihostdata_size;
+	/* LLD connection data size */
+	int conndata_size;
 	int max_lun;
 	unsigned int max_conn;
 	unsigned int max_cmd_len;
-	iscsi_sessionh_t (*create_session) (uint32_t initial_cmdsn,
-					    struct Scsi_Host *shost);
-	void (*destroy_session) (iscsi_sessionh_t session);
-	iscsi_connh_t (*create_conn) (iscsi_sessionh_t session, uint32_t cid);
+	struct Scsi_Host *(*create_session) (struct scsi_transport_template *t,
+					     uint32_t initial_cmdsn);
+	void (*destroy_session) (struct Scsi_Host *shost);
+	struct iscsi_cls_conn *(*create_conn) (struct Scsi_Host *shost,
+				uint32_t cid);
 	int (*bind_conn) (iscsi_sessionh_t session, iscsi_connh_t conn,
 			  uint32_t transport_fd, int is_leading);
 	int (*start_conn) (iscsi_connh_t conn);
 	void (*stop_conn) (iscsi_connh_t conn, int flag);
-	void (*destroy_conn) (iscsi_connh_t conn);
+	void (*destroy_conn) (struct iscsi_cls_conn *conn);
 	int (*set_param) (iscsi_connh_t conn, enum iscsi_param param,
 			  uint32_t value);
-	int (*get_param) (iscsi_connh_t conn, enum iscsi_param param,
-			  uint32_t *value);
+	int (*get_conn_param) (void *conndata, enum iscsi_param param,
+			       uint32_t *value);
+	int (*get_session_param) (struct Scsi_Host *shost,
+				  enum iscsi_param param, uint32_t *value);
 	int (*send_pdu) (iscsi_connh_t conn, struct iscsi_hdr *hdr,
 			 char *data, uint32_t data_size);
 	void (*get_stats) (iscsi_connh_t conn, struct iscsi_stats *stats);
@@ -73,7 +87,7 @@
 /*
  * transport registration upcalls
  */
-extern int iscsi_register_transport(struct iscsi_transport *tt);
+extern struct scsi_transport_template *iscsi_register_transport(struct iscsi_transport *tt);
 extern int iscsi_unregister_transport(struct iscsi_transport *tt);
 
 /*
@@ -83,4 +97,49 @@
 extern int iscsi_recv_pdu(iscsi_connh_t conn, struct iscsi_hdr *hdr,
 			  char *data, uint32_t data_size);
 
+struct iscsi_cls_conn {
+	struct list_head conn_list;	/* item in connlist */
+	void *dd_data;			/* LLD private data */
+	struct iscsi_transport *transport;
+	iscsi_connh_t connh;
+	int active;			/* must be accessed with the connlock */
+	struct device dev;		/* sysfs transport/container device */
+	struct mempool_zone *z_error;
+	struct mempool_zone *z_pdu;
+	struct list_head freequeue;
+};
+
+#define iscsi_dev_to_conn(_dev) \
+	container_of(_dev, struct iscsi_cls_conn, dev)
+
+struct iscsi_cls_session {
+	struct list_head list;	/* item in session_list */
+	struct iscsi_transport *transport;
+	struct device dev;	/* sysfs transport/container device */
+};
+
+#define iscsi_dev_to_session(_dev) \
+	container_of(_dev, struct iscsi_cls_session, dev)
+
+#define iscsi_session_to_shost(_session) \
+	dev_to_shost(_session->dev.parent)
+
+/*
+ * session and connection functions that can be used by HW iSCSI LLDs
+ */
+extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost,
+				struct iscsi_transport *t);
+extern int iscsi_destroy_session(struct iscsi_cls_session *session);
+extern struct iscsi_cls_conn *iscsi_create_conn(struct iscsi_cls_session *sess,
+					    uint32_t cid);
+extern int iscsi_destroy_conn(struct iscsi_cls_conn *conn);
+
+/*
+ * session functions used by software iscsi
+ */
+extern struct Scsi_Host *
+iscsi_transport_create_session(struct scsi_transport_template *scsit,
+                               struct iscsi_transport *transport);
+extern int iscsi_transport_destroy_session(struct Scsi_Host *shost);
+
 #endif