X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fscsi%2Fscsi_transport_iscsi.c;h=65d1737eb664663735e1090133fcfd41a76824ce;hb=9f9a73b6fe0c8fd9b54b650e34956eb92df6abfa;hp=0d7b4e79415c6b141256e7f91328c12d2a86c56d;hpb=7924e4f6519dd5b349ed146fe9fe35206730be67;p=linux-2.6

diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 0d7b4e7941..65d1737eb6 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -30,23 +30,23 @@
 #include <scsi/scsi_transport_iscsi.h>
 #include <scsi/iscsi_if.h>
 
-#define ISCSI_SESSION_ATTRS 18
-#define ISCSI_CONN_ATTRS 11
+#define ISCSI_SESSION_ATTRS 19
+#define ISCSI_CONN_ATTRS 13
 #define ISCSI_HOST_ATTRS 4
-#define ISCSI_TRANSPORT_VERSION "2.0-867"
+#define ISCSI_TRANSPORT_VERSION "2.0-869"
 
 struct iscsi_internal {
 	int daemon_pid;
 	struct scsi_transport_template t;
 	struct iscsi_transport *iscsi_transport;
 	struct list_head list;
-	struct class_device cdev;
+	struct device dev;
 
-	struct class_device_attribute *host_attrs[ISCSI_HOST_ATTRS + 1];
+	struct device_attribute *host_attrs[ISCSI_HOST_ATTRS + 1];
 	struct transport_container conn_cont;
-	struct class_device_attribute *conn_attrs[ISCSI_CONN_ATTRS + 1];
+	struct device_attribute *conn_attrs[ISCSI_CONN_ATTRS + 1];
 	struct transport_container session_cont;
-	struct class_device_attribute *session_attrs[ISCSI_SESSION_ATTRS + 1];
+	struct device_attribute *session_attrs[ISCSI_SESSION_ATTRS + 1];
 };
 
 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
@@ -63,12 +63,12 @@ static DEFINE_SPINLOCK(iscsi_transport_lock);
 #define to_iscsi_internal(tmpl) \
 	container_of(tmpl, struct iscsi_internal, t)
 
-#define cdev_to_iscsi_internal(_cdev) \
-	container_of(_cdev, struct iscsi_internal, cdev)
+#define dev_to_iscsi_internal(_dev) \
+	container_of(_dev, struct iscsi_internal, dev)
 
-static void iscsi_transport_release(struct class_device *cdev)
+static void iscsi_transport_release(struct device *dev)
 {
-	struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev);
+	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
 	kfree(priv);
 }
 
@@ -78,25 +78,27 @@ static void iscsi_transport_release(struct class_device *cdev)
  */
 static struct class iscsi_transport_class = {
 	.name = "iscsi_transport",
-	.release = iscsi_transport_release,
+	.dev_release = iscsi_transport_release,
 };
 
 static ssize_t
-show_transport_handle(struct class_device *cdev, char *buf)
+show_transport_handle(struct device *dev, struct device_attribute *attr,
+		      char *buf)
 {
-	struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev);
+	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
 	return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
 }
-static CLASS_DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
+static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
 
 #define show_transport_attr(name, format)				\
 static ssize_t								\
-show_transport_##name(struct class_device *cdev, char *buf)		\
+show_transport_##name(struct device *dev, 				\
+		      struct device_attribute *attr,char *buf)		\
 {									\
-	struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev);	\
+	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
 	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
 }									\
-static CLASS_DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
+static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
 
 show_transport_attr(caps, "0x%x");
 show_transport_attr(max_lun, "%d");
@@ -104,11 +106,11 @@ show_transport_attr(max_conn, "%d");
 show_transport_attr(max_cmd_len, "%d");
 
 static struct attribute *iscsi_transport_attrs[] = {
-	&class_device_attr_handle.attr,
-	&class_device_attr_caps.attr,
-	&class_device_attr_max_lun.attr,
-	&class_device_attr_max_conn.attr,
-	&class_device_attr_max_cmd_len.attr,
+	&dev_attr_handle.attr,
+	&dev_attr_caps.attr,
+	&dev_attr_max_lun.attr,
+	&dev_attr_max_conn.attr,
+	&dev_attr_max_cmd_len.attr,
 	NULL,
 };
 
@@ -119,7 +121,7 @@ static struct attribute_group iscsi_transport_group = {
 
 
 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
-			    struct class_device *cdev)
+			    struct device *cdev)
 {
 	struct Scsi_Host *shost = dev_to_shost(dev);
 	struct iscsi_host *ihost = shost->shost_data;
@@ -127,23 +129,24 @@ static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
 	memset(ihost, 0, sizeof(*ihost));
 	INIT_LIST_HEAD(&ihost->sessions);
 	mutex_init(&ihost->mutex);
+	atomic_set(&ihost->nr_scans, 0);
 
-	snprintf(ihost->unbind_workq_name, KOBJ_NAME_LEN, "iscsi_unbind_%d",
+	snprintf(ihost->scan_workq_name, KOBJ_NAME_LEN, "iscsi_scan_%d",
 		shost->host_no);
-	ihost->unbind_workq = create_singlethread_workqueue(
-						ihost->unbind_workq_name);
-	if (!ihost->unbind_workq)
+	ihost->scan_workq = create_singlethread_workqueue(
+						ihost->scan_workq_name);
+	if (!ihost->scan_workq)
 		return -ENOMEM;
 	return 0;
 }
 
 static int iscsi_remove_host(struct transport_container *tc, struct device *dev,
-			     struct class_device *cdev)
+			     struct device *cdev)
 {
 	struct Scsi_Host *shost = dev_to_shost(dev);
 	struct iscsi_host *ihost = shost->shost_data;
 
-	destroy_workqueue(ihost->unbind_workq);
+	destroy_workqueue(ihost->scan_workq);
 	return 0;
 }
 
@@ -221,6 +224,54 @@ static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
  * The following functions can be used by LLDs that allocate
  * their own scsi_hosts or by software iscsi LLDs
  */
+static struct {
+	int value;
+	char *name;
+} iscsi_session_state_names[] = {
+	{ ISCSI_SESSION_LOGGED_IN,	"LOGGED_IN" },
+	{ ISCSI_SESSION_FAILED,		"FAILED" },
+	{ ISCSI_SESSION_FREE,		"FREE" },
+};
+
+static const char *iscsi_session_state_name(int state)
+{
+	int i;
+	char *name = NULL;
+
+	for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
+		if (iscsi_session_state_names[i].value == state) {
+			name = iscsi_session_state_names[i].name;
+			break;
+		}
+	}
+	return name;
+}
+
+int iscsi_session_chkready(struct iscsi_cls_session *session)
+{
+	unsigned long flags;
+	int err;
+
+	spin_lock_irqsave(&session->lock, flags);
+	switch (session->state) {
+	case ISCSI_SESSION_LOGGED_IN:
+		err = 0;
+		break;
+	case ISCSI_SESSION_FAILED:
+		err = DID_IMM_RETRY << 16;
+		break;
+	case ISCSI_SESSION_FREE:
+		err = DID_NO_CONNECT << 16;
+		break;
+	default:
+		err = DID_NO_CONNECT << 16;
+		break;
+	}
+	spin_unlock_irqrestore(&session->lock, flags);
+	return err;
+}
+EXPORT_SYMBOL_GPL(iscsi_session_chkready);
+
 static void iscsi_session_release(struct device *dev)
 {
 	struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
@@ -236,6 +287,25 @@ static int iscsi_is_session_dev(const struct device *dev)
 	return dev->release == iscsi_session_release;
 }
 
+/**
+ * iscsi_scan_finished - helper to report when running scans are done
+ * @shost: scsi host
+ * @time: scan run time
+ *
+ * This function can be used by drives like qla4xxx to report to the scsi
+ * layer when the scans it kicked off at module load time are done.
+ */
+int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
+{
+	struct iscsi_host *ihost = shost->shost_data;
+	/*
+	 * qla4xxx will have kicked off some session unblocks before calling
+	 * scsi_scan_host, so just wait for them to complete.
+	 */
+	return !atomic_read(&ihost->nr_scans);
+}
+EXPORT_SYMBOL_GPL(iscsi_scan_finished);
+
 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
 			   uint id, uint lun)
 {
@@ -254,14 +324,50 @@ static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
 	return 0;
 }
 
+static void iscsi_scan_session(struct work_struct *work)
+{
+	struct iscsi_cls_session *session =
+			container_of(work, struct iscsi_cls_session, scan_work);
+	struct Scsi_Host *shost = iscsi_session_to_shost(session);
+	struct iscsi_host *ihost = shost->shost_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&session->lock, flags);
+	if (session->state != ISCSI_SESSION_LOGGED_IN) {
+		spin_unlock_irqrestore(&session->lock, flags);
+		goto done;
+	}
+	spin_unlock_irqrestore(&session->lock, flags);
+
+	scsi_scan_target(&session->dev, 0, session->target_id,
+			 SCAN_WILD_CARD, 1);
+done:
+	atomic_dec(&ihost->nr_scans);
+}
+
 static void session_recovery_timedout(struct work_struct *work)
 {
 	struct iscsi_cls_session *session =
 		container_of(work, struct iscsi_cls_session,
 			     recovery_work.work);
+	unsigned long flags;
+
+	iscsi_cls_session_printk(KERN_INFO, session,
+				 "session recovery timed out after %d secs\n",
+				 session->recovery_tmo);
 
-	dev_printk(KERN_INFO, &session->dev, "iscsi: session recovery timed "
-		  "out after %d secs\n", session->recovery_tmo);
+	spin_lock_irqsave(&session->lock, flags);
+	switch (session->state) {
+	case ISCSI_SESSION_FAILED:
+		session->state = ISCSI_SESSION_FREE;
+		break;
+	case ISCSI_SESSION_LOGGED_IN:
+	case ISCSI_SESSION_FREE:
+		/* we raced with the unblock's flush */
+		spin_unlock_irqrestore(&session->lock, flags);
+		return;
+	}
+	spin_unlock_irqrestore(&session->lock, flags);
 
 	if (session->transport->session_recovery_timedout)
 		session->transport->session_recovery_timedout(session);
@@ -269,20 +375,72 @@ static void session_recovery_timedout(struct work_struct *work)
 	scsi_target_unblock(&session->dev);
 }
 
-void iscsi_unblock_session(struct iscsi_cls_session *session)
+static void __iscsi_unblock_session(struct work_struct *work)
 {
-	if (!cancel_delayed_work(&session->recovery_work))
-		flush_workqueue(iscsi_eh_timer_workq);
+	struct iscsi_cls_session *session =
+			container_of(work, struct iscsi_cls_session,
+				     unblock_work);
+	struct Scsi_Host *shost = iscsi_session_to_shost(session);
+	struct iscsi_host *ihost = shost->shost_data;
+	unsigned long flags;
+
+	/*
+	 * The recovery and unblock work get run from the same workqueue,
+	 * so try to cancel it if it was going to run after this unblock.
+	 */
+	cancel_delayed_work(&session->recovery_work);
+	spin_lock_irqsave(&session->lock, flags);
+	session->state = ISCSI_SESSION_LOGGED_IN;
+	spin_unlock_irqrestore(&session->lock, flags);
+	/* start IO */
 	scsi_target_unblock(&session->dev);
+	/*
+	 * Only do kernel scanning if the driver is properly hooked into
+	 * the async scanning code (drivers like iscsi_tcp do login and
+	 * scanning from userspace).
+	 */
+	if (shost->hostt->scan_finished) {
+		if (queue_work(ihost->scan_workq, &session->scan_work))
+			atomic_inc(&ihost->nr_scans);
+	}
+}
+
+/**
+ * iscsi_unblock_session - set a session as logged in and start IO.
+ * @session: iscsi session
+ *
+ * Mark a session as ready to accept IO.
+ */
+void iscsi_unblock_session(struct iscsi_cls_session *session)
+{
+	queue_work(iscsi_eh_timer_workq, &session->unblock_work);
+	/*
+	 * make sure all the events have completed before tell the driver
+	 * it is safe
+	 */
+	flush_workqueue(iscsi_eh_timer_workq);
 }
 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
 
-void iscsi_block_session(struct iscsi_cls_session *session)
+static void __iscsi_block_session(struct work_struct *work)
 {
+	struct iscsi_cls_session *session =
+			container_of(work, struct iscsi_cls_session,
+				     block_work);
+	unsigned long flags;
+
+	spin_lock_irqsave(&session->lock, flags);
+	session->state = ISCSI_SESSION_FAILED;
+	spin_unlock_irqrestore(&session->lock, flags);
 	scsi_target_block(&session->dev);
 	queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work,
 			   session->recovery_tmo * HZ);
 }
+
+void iscsi_block_session(struct iscsi_cls_session *session)
+{
+	queue_work(iscsi_eh_timer_workq, &session->block_work);
+}
 EXPORT_SYMBOL_GPL(iscsi_block_session);
 
 static void __iscsi_unbind_session(struct work_struct *work)
@@ -311,7 +469,7 @@ static int iscsi_unbind_session(struct iscsi_cls_session *session)
 	struct Scsi_Host *shost = iscsi_session_to_shost(session);
 	struct iscsi_host *ihost = shost->shost_data;
 
-	return queue_work(ihost->unbind_workq, &session->unbind_work);
+	return queue_work(ihost->scan_workq, &session->unbind_work);
 }
 
 struct iscsi_cls_session *
@@ -327,10 +485,15 @@ iscsi_alloc_session(struct Scsi_Host *shost,
 
 	session->transport = transport;
 	session->recovery_tmo = 120;
+	session->state = ISCSI_SESSION_FREE;
 	INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
 	INIT_LIST_HEAD(&session->host_list);
 	INIT_LIST_HEAD(&session->sess_list);
+	INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
+	INIT_WORK(&session->block_work, __iscsi_block_session);
 	INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
+	INIT_WORK(&session->scan_work, iscsi_scan_session);
+	spin_lock_init(&session->lock);
 
 	/* this is released in the dev's release function */
 	scsi_host_get(shost);
@@ -358,8 +521,8 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
 		 session->sid);
 	err = device_add(&session->dev);
 	if (err) {
-		dev_printk(KERN_ERR, &session->dev, "iscsi: could not "
-			   "register session's dev\n");
+		iscsi_cls_session_printk(KERN_ERR, session,
+					 "could not register session's dev\n");
 		goto release_host;
 	}
 	transport_register_device(&session->dev);
@@ -440,26 +603,33 @@ void iscsi_remove_session(struct iscsi_cls_session *session)
 	list_del(&session->sess_list);
 	spin_unlock_irqrestore(&sesslock, flags);
 
+	/* make sure there are no blocks/unblocks queued */
+	flush_workqueue(iscsi_eh_timer_workq);
+	/* make sure the timedout callout is not running */
+	if (!cancel_delayed_work(&session->recovery_work))
+		flush_workqueue(iscsi_eh_timer_workq);
 	/*
 	 * If we are blocked let commands flow again. The lld or iscsi
 	 * layer should set up the queuecommand to fail commands.
+	 * We assume that LLD will not be calling block/unblock while
+	 * removing the session.
 	 */
-	iscsi_unblock_session(session);
-	iscsi_unbind_session(session);
-	/*
-	 * If the session dropped while removing devices then we need to make
-	 * sure it is not blocked
-	 */
-	if (!cancel_delayed_work(&session->recovery_work))
-		flush_workqueue(iscsi_eh_timer_workq);
-	flush_workqueue(ihost->unbind_workq);
+	spin_lock_irqsave(&session->lock, flags);
+	session->state = ISCSI_SESSION_FREE;
+	spin_unlock_irqrestore(&session->lock, flags);
+
+	scsi_target_unblock(&session->dev);
+	/* flush running scans then delete devices */
+	flush_workqueue(ihost->scan_workq);
+	__iscsi_unbind_session(&session->unbind_work);
 
 	/* hw iscsi may not have removed all connections from session */
 	err = device_for_each_child(&session->dev, NULL,
 				    iscsi_iter_destroy_conn_fn);
 	if (err)
-		dev_printk(KERN_ERR, &session->dev, "iscsi: Could not delete "
-			   "all connections for session. Error %d.\n", err);
+		iscsi_cls_session_printk(KERN_ERR, session,
+					 "Could not delete all connections "
+					 "for session. Error %d.\n", err);
 
 	transport_unregister_device(&session->dev);
 	device_del(&session->dev);
@@ -531,8 +701,8 @@ iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid)
 	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");
+		iscsi_cls_session_printk(KERN_ERR, session, "could not "
+					 "register connection's dev\n");
 		goto release_parent_ref;
 	}
 	transport_register_device(&conn->dev);
@@ -639,8 +809,8 @@ int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
 	skb = alloc_skb(len, GFP_ATOMIC);
 	if (!skb) {
 		iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED);
-		dev_printk(KERN_ERR, &conn->dev, "iscsi: can not deliver "
-			   "control PDU: OOM\n");
+		iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
+				      "control PDU: OOM\n");
 		return -ENOMEM;
 	}
 
@@ -673,8 +843,8 @@ void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error)
 
 	skb = alloc_skb(len, GFP_ATOMIC);
 	if (!skb) {
-		dev_printk(KERN_ERR, &conn->dev, "iscsi: gracefully ignored "
-			  "conn error (%d)\n", error);
+		iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
+				      "conn error (%d)\n", error);
 		return;
 	}
 
@@ -688,8 +858,8 @@ void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error)
 
 	iscsi_broadcast_skb(skb, GFP_ATOMIC);
 
-	dev_printk(KERN_INFO, &conn->dev, "iscsi: detected conn error (%d)\n",
-		   error);
+	iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
+			      error);
 }
 EXPORT_SYMBOL_GPL(iscsi_conn_error);
 
@@ -744,8 +914,8 @@ iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
 
 		skbstat = alloc_skb(len, GFP_ATOMIC);
 		if (!skbstat) {
-			dev_printk(KERN_ERR, &conn->dev, "iscsi: can not "
-				   "deliver stats: OOM\n");
+			iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
+					      "deliver stats: OOM\n");
 			return -ENOMEM;
 		}
 
@@ -801,8 +971,9 @@ int iscsi_session_event(struct iscsi_cls_session *session,
 
 	skb = alloc_skb(len, GFP_KERNEL);
 	if (!skb) {
-		dev_printk(KERN_ERR, &session->dev, "Cannot notify userspace "
-			  "of session event %u\n", event);
+		iscsi_cls_session_printk(KERN_ERR, session,
+					 "Cannot notify userspace of session "
+					 "event %u\n", event);
 		return -ENOMEM;
 	}
 
@@ -825,8 +996,8 @@ int iscsi_session_event(struct iscsi_cls_session *session,
 		ev->r.unbind_session.sid = session->sid;
 		break;
 	default:
-		dev_printk(KERN_ERR, &session->dev, "Invalid event %u.\n",
-			   event);
+		iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
+					 "%u.\n", event);
 		kfree_skb(skb);
 		return -EINVAL;
 	}
@@ -837,8 +1008,10 @@ int iscsi_session_event(struct iscsi_cls_session *session,
 	 */
 	rc = iscsi_broadcast_skb(skb, GFP_KERNEL);
 	if (rc < 0)
-		dev_printk(KERN_ERR, &session->dev, "Cannot notify userspace "
-			  "of session event %u. Check iscsi daemon\n", event);
+		iscsi_cls_session_printk(KERN_ERR, session,
+					 "Cannot notify userspace of session "
+					 "event %u. Check iscsi daemon\n",
+					 event);
 	return rc;
 }
 EXPORT_SYMBOL_GPL(iscsi_session_event);
@@ -871,16 +1044,15 @@ iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
 
 	session = iscsi_session_lookup(ev->u.c_conn.sid);
 	if (!session) {
-		printk(KERN_ERR "iscsi: invalid session %d\n",
+		printk(KERN_ERR "iscsi: invalid session %d.\n",
 		       ev->u.c_conn.sid);
 		return -EINVAL;
 	}
 
 	conn = transport->create_conn(session, ev->u.c_conn.cid);
 	if (!conn) {
-		printk(KERN_ERR "iscsi: couldn't create a new "
-			   "connection for session %d\n",
-			   session->sid);
+		iscsi_cls_session_printk(KERN_ERR, session,
+					 "couldn't create a new connection.");
 		return -ENOMEM;
 	}
 
@@ -1167,11 +1339,8 @@ iscsi_if_rx(struct sk_buff *skb)
 	mutex_unlock(&rx_queue_mutex);
 }
 
-#define iscsi_cdev_to_conn(_cdev) \
-	iscsi_dev_to_conn(_cdev->dev)
-
 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store)		\
-struct class_device_attribute class_device_attr_##_prefix##_##_name =	\
+struct device_attribute dev_attr_##_prefix##_##_name =	\
 	__ATTR(_name,_mode,_show,_store)
 
 /*
@@ -1179,9 +1348,10 @@ struct class_device_attribute class_device_attr_##_prefix##_##_name =	\
  */
 #define iscsi_conn_attr_show(param)					\
 static ssize_t								\
-show_conn_param_##param(struct class_device *cdev, char *buf)		\
+show_conn_param_##param(struct device *dev, 				\
+			struct device_attribute *attr, char *buf)	\
 {									\
-	struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev);		\
+	struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);	\
 	struct iscsi_transport *t = conn->transport;			\
 	return t->get_conn_param(conn, param, buf);			\
 }
@@ -1205,17 +1375,16 @@ iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS);
 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
 
-#define iscsi_cdev_to_session(_cdev) \
-	iscsi_dev_to_session(_cdev->dev)
-
 /*
  * iSCSI session attrs
  */
 #define iscsi_session_attr_show(param, perm)				\
 static ssize_t								\
-show_session_param_##param(struct class_device *cdev, char *buf)	\
+show_session_param_##param(struct device *dev,				\
+			   struct device_attribute *attr, char *buf)	\
 {									\
-	struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \
+	struct iscsi_cls_session *session = 				\
+		iscsi_dev_to_session(dev->parent);			\
 	struct iscsi_transport *t = session->transport;			\
 									\
 	if (perm && !capable(CAP_SYS_ADMIN))				\
@@ -1246,11 +1415,23 @@ iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
 
+static ssize_t
+show_priv_session_state(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
+	return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
+}
+static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
+			NULL);
+
 #define iscsi_priv_session_attr_show(field, format)			\
 static ssize_t								\
-show_priv_session_##field(struct class_device *cdev, char *buf)		\
+show_priv_session_##field(struct device *dev, 				\
+			  struct device_attribute *attr, char *buf)	\
 {									\
-	struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev);\
+	struct iscsi_cls_session *session = 				\
+			iscsi_dev_to_session(dev->parent);		\
 	return sprintf(buf, format"\n", session->field);		\
 }
 
@@ -1265,9 +1446,10 @@ iscsi_priv_session_attr(recovery_tmo, "%d");
  */
 #define iscsi_host_attr_show(param)					\
 static ssize_t								\
-show_host_param_##param(struct class_device *cdev, char *buf)		\
+show_host_param_##param(struct device *dev, 				\
+			struct device_attribute *attr, char *buf)	\
 {									\
-	struct Scsi_Host *shost = transport_class_to_shost(cdev);	\
+	struct Scsi_Host *shost = transport_class_to_shost(dev);	\
 	struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
 	return priv->iscsi_transport->get_host_param(shost, param, buf); \
 }
@@ -1284,7 +1466,7 @@ iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
 
 #define SETUP_PRIV_SESSION_RD_ATTR(field)				\
 do {									\
-	priv->session_attrs[count] = &class_device_attr_priv_sess_##field; \
+	priv->session_attrs[count] = &dev_attr_priv_sess_##field; \
 	count++;							\
 } while (0)
 
@@ -1292,7 +1474,7 @@ do {									\
 #define SETUP_SESSION_RD_ATTR(field, param_flag)			\
 do {									\
 	if (tt->param_mask & param_flag) {				\
-		priv->session_attrs[count] = &class_device_attr_sess_##field; \
+		priv->session_attrs[count] = &dev_attr_sess_##field; \
 		count++;						\
 	}								\
 } while (0)
@@ -1300,7 +1482,7 @@ do {									\
 #define SETUP_CONN_RD_ATTR(field, param_flag)				\
 do {									\
 	if (tt->param_mask & param_flag) {				\
-		priv->conn_attrs[count] = &class_device_attr_conn_##field; \
+		priv->conn_attrs[count] = &dev_attr_conn_##field; \
 		count++;						\
 	}								\
 } while (0)
@@ -1308,7 +1490,7 @@ do {									\
 #define SETUP_HOST_RD_ATTR(field, param_flag)				\
 do {									\
 	if (tt->host_param_mask & param_flag) {				\
-		priv->host_attrs[count] = &class_device_attr_host_##field; \
+		priv->host_attrs[count] = &dev_attr_host_##field; \
 		count++;						\
 	}								\
 } while (0)
@@ -1399,15 +1581,15 @@ iscsi_register_transport(struct iscsi_transport *tt)
 	priv->iscsi_transport = tt;
 	priv->t.user_scan = iscsi_user_scan;
 
-	priv->cdev.class = &iscsi_transport_class;
-	snprintf(priv->cdev.class_id, BUS_ID_SIZE, "%s", tt->name);
-	err = class_device_register(&priv->cdev);
+	priv->dev.class = &iscsi_transport_class;
+	snprintf(priv->dev.bus_id, BUS_ID_SIZE, "%s", tt->name);
+	err = device_register(&priv->dev);
 	if (err)
 		goto free_priv;
 
-	err = sysfs_create_group(&priv->cdev.kobj, &iscsi_transport_group);
+	err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
 	if (err)
-		goto unregister_cdev;
+		goto unregister_dev;
 
 	/* host parameters */
 	priv->t.host_attrs.ac.attrs = &priv->host_attrs[0];
@@ -1472,6 +1654,7 @@ iscsi_register_transport(struct iscsi_transport *tt)
 	SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO);
 	SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO);
 	SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo);
+	SETUP_PRIV_SESSION_RD_ATTR(state);
 
 	BUG_ON(count > ISCSI_SESSION_ATTRS);
 	priv->session_attrs[count] = NULL;
@@ -1483,8 +1666,8 @@ iscsi_register_transport(struct iscsi_transport *tt)
 	printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
 	return &priv->t;
 
-unregister_cdev:
-	class_device_unregister(&priv->cdev);
+unregister_dev:
+	device_unregister(&priv->dev);
 free_priv:
 	kfree(priv);
 	return NULL;
@@ -1511,8 +1694,8 @@ int iscsi_unregister_transport(struct iscsi_transport *tt)
 	transport_container_unregister(&priv->session_cont);
 	transport_container_unregister(&priv->t.host_attrs);
 
-	sysfs_remove_group(&priv->cdev.kobj, &iscsi_transport_group);
-	class_device_unregister(&priv->cdev);
+	sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
+	device_unregister(&priv->dev);
 	mutex_unlock(&rx_queue_mutex);
 
 	return 0;