}

static void stop_conn_work_fn(struct work_struct *work)
{
	struct iscsi_cls_conn *conn, *tmp;
	unsigned long flags;
	LIST_HEAD(recovery_list);

	spin_lock_irqsave(&connlock, flags);
	if (list_empty(&connlist_err)) {
		spin_unlock_irqrestore(&connlock, flags);
		return;
	}
	list_splice_init(&connlist_err, &recovery_list);
	spin_unlock_irqrestore(&connlock, flags);

	list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) {
		uint32_t sid = iscsi_conn_get_sid(conn);
		struct iscsi_cls_session *session;

		session = iscsi_session_lookup(sid);
		if (session) {
			if (system_state != SYSTEM_RUNNING) {
				session->recovery_tmo = 0;
				iscsi_if_stop_conn(conn, STOP_CONN_TERM);
			} else {
				iscsi_if_stop_conn(conn, STOP_CONN_RECOVER);
			}
		}


 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
 * @job: bsg job to be processed
 */
static int iscsi_bsg_host_dispatch(struct bsg_job *job)
{
	struct Scsi_Host *shost = iscsi_job_to_shost(job);
	struct iscsi_bsg_request *req = job->request;
	struct iscsi_bsg_reply *reply = job->reply;
	struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
	int cmdlen = sizeof(uint32_t);	/* start with length of msgcode */
	int ret;

	/* check if we have the msgcode value at least */
	if (job->request_len < sizeof(uint32_t)) {
		ret = -ENOMSG;
		goto fail_host_msg;
	}

	/* Validate the host command */
	switch (req->msgcode) {
	case ISCSI_BSG_HST_VENDOR:
		cmdlen += sizeof(struct iscsi_bsg_host_vendor);
		if ((shost->hostt->vendor_id == 0L) ||
		    (req->rqst_data.h_vendor.vendor_id !=
			shost->hostt->vendor_id)) {
			ret = -ESRCH;
			goto fail_host_msg;
		}
		break;
	default:
		ret = -EBADR;
		goto fail_host_msg;
	}

	/* check if we really have all the request data needed */
	if (job->request_len < cmdlen) {
		ret = -ENOMSG;
		goto fail_host_msg;
	}

	ret = i->iscsi_transport->bsg_request(job);
	if (!ret)
		return 0;

fail_host_msg:
	/* return the errno failure code as the only status */
	BUG_ON(job->reply_len < sizeof(uint32_t));
	reply->reply_payload_rcv_len = 0;
	reply->result = ret;
	job->reply_len = sizeof(uint32_t);

scsi: iscsi: Verify lengths on passthrough PDUs

Open-iSCSI sends passthrough PDUs over netlink, but the kernel should be
verifying that the provided PDU header and data lengths fall within the
netlink message to prevent accessing beyond that in memory.

Cc: stable@vger.kernel.org
Reported-by: Adam Nichols <adam@grimm-co.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Chris Leech <cleech@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

static int dbg_session;

static int dbg_conn;

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static DECLARE_WORK(stop_conn_work, stop_conn_work_fn);

static atomic_t iscsi_session_nr;

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

static DEFINE_IDA(iscsi_sess_ida);

static LIST_HEAD(iscsi_transports);

static DEFINE_SPINLOCK(iscsi_transport_lock);

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)

#define iscsi_iface_attr_show(type, name, param_type, param)		\
static ssize_t								\
show_##type##_##name(struct device *dev, struct device_attribute *attr,	\
		     char *buf)						\
{									\
	struct iscsi_iface *iface = iscsi_dev_to_iface(dev);		\
	struct iscsi_transport *t = iface->transport;			\
	return t->get_iface_param(iface, param_type, param, buf);	\
}									\

#define iscsi_iface_net_attr(type, name, param)				\
	iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param)	\
static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);


}
EXPORT_SYMBOL_GPL(iscsi_remove_session);

void iscsi_free_session(struct iscsi_cls_session *session)
{
	ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)

#define iscsi_iface_attr_show(type, name, param_type, param)		\
static ssize_t								\
show_##type##_##name(struct device *dev, struct device_attribute *attr,	\
		     char *buf)						\
{									\
	struct iscsi_iface *iface = iscsi_dev_to_iface(dev);		\
	struct iscsi_transport *t = iface->transport;			\
	return t->get_iface_param(iface, param_type, param, buf);	\
}									\


}

static int
iscsi_unicast_skb(struct sk_buff *skb, u32 portid)


	{ISCSI_PORT_STATE_UP,		"LINK UP" },
};

char *iscsi_get_port_state_name(struct Scsi_Host *shost)
{
	int i;
	char *state = "Unknown!";
	struct iscsi_cls_host *ihost = shost->shost_data;
	uint32_t port_state = ihost->port_state;

	for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
		if (iscsi_port_state_names[i].value & port_state) {
			state = iscsi_port_state_names[i].name;
			break;
		}

static int dbg_session;

static int dbg_conn;

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)

#define iscsi_iface_attr_show(type, name, param_type, param)		\
static ssize_t								\
show_##type##_##name(struct device *dev, struct device_attribute *attr,	\
		     char *buf)						\
{									\
	struct iscsi_iface *iface = iscsi_dev_to_iface(dev);		\
	struct iscsi_transport *t = iface->transport;			\
	return t->get_iface_param(iface, param_type, param, buf);	\
}									\

#define iscsi_iface_net_attr(type, name, param)				\
	iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param)	\
static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);

#define iscsi_iface_attr(type, name, param)				\
	iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param)	\
static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);


/*
 * Returns the matching session to a given sid
 */
static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
{
	unsigned long flags;
	struct iscsi_cls_session *sess;

	spin_lock_irqsave(&sesslock, flags);
	list_for_each_entry(sess, &sesslist, sess_list) {
		if (sess->sid == sid) {
			spin_unlock_irqrestore(&sesslock, flags);
			return sess;
		}
	}


	ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
}

static void __iscsi_unblock_session(struct work_struct *work)
{
	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_cls_host *ihost = shost->shost_data;
	unsigned long flags;

	ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
	/*
	 * 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, SDEV_RUNNING);
	/*
	 * 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 (scsi_queue_work(shost, &session->scan_work))
			atomic_inc(&ihost->nr_scans);

static int dbg_session;

static int dbg_conn;

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static DECLARE_WORK(stop_conn_work, stop_conn_work_fn);

static atomic_t iscsi_session_nr;

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

static DEFINE_IDA(iscsi_sess_ida);

static LIST_HEAD(iscsi_transports);

static DEFINE_SPINLOCK(iscsi_transport_lock);

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};


EXPORT_SYMBOL_GPL(iscsi_session_event);

static int
iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
			struct iscsi_uevent *ev, pid_t pid,
			uint32_t initial_cmdsn,	uint16_t cmds_max,
			uint16_t queue_depth)
{
	struct iscsi_transport *transport = priv->iscsi_transport;
	struct iscsi_cls_session *session;
	struct Scsi_Host *shost;

	session = transport->create_session(ep, cmds_max, queue_depth,
					    initial_cmdsn);
	if (!session)
		return -ENOMEM;

	session->creator = pid;
	shost = iscsi_session_to_shost(session);
	ev->r.c_session_ret.host_no = shost->host_no;
	ev->r.c_session_ret.sid = session->sid;
	ISCSI_DBG_TRANS_SESSION(session,

static int dbg_session;

static int dbg_conn;

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static DECLARE_WORK(stop_conn_work, stop_conn_work_fn);

static atomic_t iscsi_session_nr;

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

static DEFINE_IDA(iscsi_sess_ida);

static LIST_HEAD(iscsi_transports);

static DEFINE_SPINLOCK(iscsi_transport_lock);

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)


				   session->recovery_tmo * HZ);
}

void iscsi_block_session(struct iscsi_cls_session *session)

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)

#define iscsi_iface_attr_show(type, name, param_type, param)		\
static ssize_t								\
show_##type##_##name(struct device *dev, struct device_attribute *attr,	\
		     char *buf)						\
{									\
	struct iscsi_iface *iface = iscsi_dev_to_iface(dev);		\
	struct iscsi_transport *t = iface->transport;			\
	return t->get_iface_param(iface, param_type, param, buf);	\
}									\


 *  1 on success
 *  0 on failure
 */
static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)


 * iscsi interface functions
 */
static struct iscsi_internal *
iscsi_if_transport_lookup(struct iscsi_transport *tt)
{
	struct iscsi_internal *priv;
	unsigned long flags;

	spin_lock_irqsave(&iscsi_transport_lock, flags);
	list_for_each_entry(priv, &iscsi_transports, list) {
		if (tt == priv->iscsi_transport) {
			spin_unlock_irqrestore(&iscsi_transport_lock, flags);
			return priv;
		}
	}


}

static int
iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
{
	struct iscsi_cls_conn *conn;
	unsigned long flags;

	conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
	if (!conn)
		return -EINVAL;

	spin_lock_irqsave(&connlock, flags);
	if (!list_empty(&conn->conn_list_err)) {
		spin_unlock_irqrestore(&connlock, flags);
		return -EAGAIN;
	}
	spin_unlock_irqrestore(&connlock, flags);

	ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");

	mutex_lock(&conn_mutex);
	if (transport->destroy_conn)
		transport->destroy_conn(conn);
	mutex_unlock(&conn_mutex);

static int dbg_session;

static int dbg_conn;

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static DECLARE_WORK(stop_conn_work, stop_conn_work_fn);

static atomic_t iscsi_session_nr;

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

static DEFINE_IDA(iscsi_sess_ida);

static LIST_HEAD(iscsi_transports);

static DEFINE_SPINLOCK(iscsi_transport_lock);

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)


	return err;
}

static int iscsi_if_ep_connect(struct iscsi_transport *transport,
			       struct iscsi_uevent *ev, int msg_type)
{
	struct iscsi_endpoint *ep;
	struct sockaddr *dst_addr;
	struct Scsi_Host *shost = NULL;
	int non_blocking, err = 0;

	if (!transport->ep_connect)
		return -EINVAL;

	if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
		shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
		if (!shost) {
			printk(KERN_ERR "ep connect failed. Could not find "
			       "host no %u\n",
			       ev->u.ep_connect_through_host.host_no);
			return -ENODEV;
		}
		non_blocking = ev->u.ep_connect_through_host.non_blocking;
	} else
		non_blocking = ev->u.ep_connect.non_blocking;

	dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
	ep = transport->ep_connect(shost, dst_addr, non_blocking);
	if (IS_ERR(ep)) {
		err = PTR_ERR(ep);
		goto release_host;
	}

	ev->r.ep_connect_ret.handle = ep->id;
release_host:
	if (shost)


	return &priv->session_cont.ac == cont;
}

static int iscsi_conn_match(struct attribute_container *cont,
			   struct device *dev)
{
	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_conn(dev);
	session = iscsi_dev_to_session(conn->dev.parent);
	shost = iscsi_session_to_shost(session);

	if (!shost->transportt)
		return 0;

	priv = to_iscsi_internal(shost->transportt);
	if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
		return 0;


static LIST_HEAD(connlist_err);
static DEFINE_SPINLOCK(connlock);

static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
{


 *
 * This can be called from a LLD or iscsi_transport.
 */
int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
{
	unsigned long flags;

	spin_lock_irqsave(&connlock, flags);
	list_del(&conn->conn_list);
	list_del(&conn->conn_list_err);
	spin_unlock_irqrestore(&connlock, flags);

	transport_unregister_device(&conn->dev);
	ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");

static int dbg_session;

static int dbg_conn;

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)


 *  %NULL on failure
 */
struct device *
iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
{

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)

#define iscsi_iface_attr_show(type, name, param_type, param)		\
static ssize_t								\
show_##type##_##name(struct device *dev, struct device_attribute *attr,	\
		     char *buf)						\
{									\
	struct iscsi_iface *iface = iscsi_dev_to_iface(dev);		\
	struct iscsi_transport *t = iface->transport;			\
	return t->get_iface_param(iface, param_type, param, buf);	\
}									\

#define iscsi_iface_net_attr(type, name, param)				\
	iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param)	\
static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);

#define iscsi_iface_attr(type, name, param)				\
	iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param)	\
static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);


	put_device(parent);
}

static int iscsi_is_conn_dev(const struct device *dev)


}
EXPORT_SYMBOL_GPL(iscsi_dbg_trace);

static __init int iscsi_transport_init(void)
{
	int err;
	struct netlink_kernel_cfg cfg = {
		.groups	= 1,
		.input	= iscsi_if_rx,
	};
	printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
		ISCSI_TRANSPORT_VERSION);

	atomic_set(&iscsi_session_nr, 0);

	err = class_register(&iscsi_transport_class);
	if (err)
		return err;

	err = class_register(&iscsi_endpoint_class);
	if (err)
		goto unregister_transport_class;

	err = class_register(&iscsi_iface_class);
	if (err)
		goto unregister_endpoint_class;

	err = transport_class_register(&iscsi_host_class);
	if (err)
		goto unregister_iface_class;

	err = transport_class_register(&iscsi_connection_class);
	if (err)
		goto unregister_host_class;

	err = transport_class_register(&iscsi_session_class);
	if (err)
		goto unregister_conn_class;

	err = bus_register(&iscsi_flashnode_bus);
	if (err)
		goto unregister_session_class;

	nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
	if (!nls) {
		err = -ENOBUFS;
		goto unregister_flashnode_bus;
	}

	iscsi_eh_timer_workq = alloc_workqueue("%s",
			WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
			1, "iscsi_eh");
	if (!iscsi_eh_timer_workq) {
		err = -ENOMEM;
		goto release_nls;
	}

	iscsi_destroy_workq = alloc_workqueue("%s",
			WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
			1, "iscsi_destroy");
	if (!iscsi_destroy_workq) {
		err = -ENOMEM;
		goto destroy_wq;
	}

	return 0;

destroy_wq:
	destroy_workqueue(iscsi_eh_timer_workq);
release_nls:
	netlink_kernel_release(nls);
unregister_flashnode_bus:
	bus_unregister(&iscsi_flashnode_bus);
unregister_session_class:
	transport_class_unregister(&iscsi_session_class);
unregister_conn_class:
	transport_class_unregister(&iscsi_connection_class);
unregister_host_class:
	transport_class_unregister(&iscsi_host_class);
unregister_iface_class:
	class_unregister(&iscsi_iface_class);
unregister_endpoint_class:
	class_unregister(&iscsi_endpoint_class);
unregister_transport_class:

#define ISCSI_TRANSPORT_VERSION "2.0-870"

static int dbg_session;

static int dbg_conn;

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static DECLARE_WORK(stop_conn_work, stop_conn_work_fn);

static atomic_t iscsi_session_nr;

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

static DEFINE_IDA(iscsi_sess_ida);

static LIST_HEAD(iscsi_transports);

static DEFINE_SPINLOCK(iscsi_transport_lock);

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};


	kfree(session);
}

int iscsi_is_session_dev(const struct device *dev)


show_transport_handle(struct device *dev, struct device_attribute *attr,
		      char *buf)
{
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;
	return sysfs_emit(buf, "%llu\n",
		  (unsigned long long)iscsi_handle(priv->iscsi_transport));
}

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)


 * 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,
		     int dd_size, unsigned int target_id)
{
	struct iscsi_cls_session *session;

	session = iscsi_alloc_session(shost, transport, dd_size);
	if (!session)
		return NULL;

	if (iscsi_add_session(session, target_id)) {
		iscsi_free_session(session);
		return NULL;

static int dbg_session;

static int dbg_conn;

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)

#define iscsi_iface_attr_show(type, name, param_type, param)		\
static ssize_t								\
show_##type##_##name(struct device *dev, struct device_attribute *attr,	\
		     char *buf)						\
{									\
	struct iscsi_iface *iface = iscsi_dev_to_iface(dev);		\
	struct iscsi_transport *t = iface->transport;			\
	return t->get_iface_param(iface, param_type, param, buf);	\
}									\

#define iscsi_iface_net_attr(type, name, param)				\
	iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param)	\
static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);

#define iscsi_iface_attr(type, name, param)				\
	iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param)	\
static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);


	NULL,
};

static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
					 struct attribute *attr, int i)
{
	struct device *cdev = container_of(kobj, struct device, kobj);
	struct Scsi_Host *shost = transport_class_to_shost(cdev);
	struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
	int param;

	if (attr == &dev_attr_host_netdev.attr)
		param = ISCSI_HOST_PARAM_NETDEV_NAME;
	else if (attr == &dev_attr_host_hwaddress.attr)
		param = ISCSI_HOST_PARAM_HWADDRESS;
	else if (attr == &dev_attr_host_ipaddress.attr)
		param = ISCSI_HOST_PARAM_IPADDRESS;
	else if (attr == &dev_attr_host_initiatorname.attr)
		param = ISCSI_HOST_PARAM_INITIATOR_NAME;
	else if (attr == &dev_attr_host_port_state.attr)
		param = ISCSI_HOST_PARAM_PORT_STATE;
	else if (attr == &dev_attr_host_port_speed.attr)
		param = ISCSI_HOST_PARAM_PORT_SPEED;
	else {
		WARN_ONCE(1, "Invalid host attr");
		return 0;
	}


 *
 * 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);
	/*
	 * Blocking the session can be done from any context so we only
	 * queue the block work. Make sure the unblock work has completed
	 * because it flushes/cancels the other works and updates the state.


	return err;
}

static int iscsi_new_flashnode(struct iscsi_transport *transport,
			       struct iscsi_uevent *ev, uint32_t len)
{
	char *data = (char *)ev + sizeof(*ev);
	struct Scsi_Host *shost;
	int index;
	int err = 0;

	if (!transport->new_flashnode) {
		err = -ENOSYS;
		goto exit_new_fnode;
	}

	shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
	if (!shost) {
		pr_err("%s could not find host no %u\n",
		       __func__, ev->u.new_flashnode.host_no);
		err = -ENODEV;
		goto put_host;
	}

	index = transport->new_flashnode(shost, data, len);

	if (index >= 0)
		ev->r.new_flashnode_ret.flashnode_idx = index;
	else
		err = -EIO;

put_host:
	scsi_host_put(shost);


void iscsi_destroy_iface(struct iscsi_iface *iface)
{
	sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
	device_unregister(&iface->dev);

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)


}

static int
iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
{
	struct Scsi_Host *shost;
	struct iscsi_path *params;
	int err;

	if (!transport->set_path)
		return -ENOSYS;

	shost = scsi_host_lookup(ev->u.set_path.host_no);
	if (!shost) {
		printk(KERN_ERR "set path could not find host no %u\n",
		       ev->u.set_path.host_no);
		return -ENODEV;
	}

	params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
	err = transport->set_path(shost, params);


	return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
}

void iscsi_remove_session(struct iscsi_cls_session *session)
{
	unsigned long flags;
	int err;

	ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");

	spin_lock_irqsave(&sesslock, flags);
	if (!list_empty(&session->sess_list))
		list_del(&session->sess_list);
	spin_unlock_irqrestore(&sesslock, flags);

	flush_work(&session->block_work);
	flush_work(&session->unblock_work);
	cancel_delayed_work_sync(&session->recovery_work);
	/*
	 * 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.
	 */
	spin_lock_irqsave(&session->lock, flags);
	session->state = ISCSI_SESSION_FREE;
	spin_unlock_irqrestore(&session->lock, flags);

	scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
	/* flush running scans then delete devices */
	flush_work(&session->scan_work);
	/* flush running unbind operations */
	flush_work(&session->unbind_work);
	__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)
		iscsi_cls_session_printk(KERN_ERR, session,
					 "Could not delete all connections "
					 "for session. Error %d.\n", err);

	transport_unregister_device(&session->dev);

static int dbg_session;

static int dbg_conn;

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)


char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
{
	int i;
	char *state = NULL;

	for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
		if (iscsi_ipaddress_state_names[i].value == port_state) {
			state = iscsi_ipaddress_state_names[i].name;
			break;
		}
	}
	return state;

static int dbg_session;

static int dbg_conn;

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define iscsi_iface_attr_show(type, name, param_type, param)		\
static ssize_t								\
show_##type##_##name(struct device *dev, struct device_attribute *attr,	\
		     char *buf)						\
{									\
	struct iscsi_iface *iface = iscsi_dev_to_iface(dev);		\
	struct iscsi_transport *t = iface->transport;			\
	return t->get_iface_param(iface, param_type, param, buf);	\
}									\

#define iscsi_iface_net_attr(type, name, param)				\
	iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param)	\
static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);

#define iscsi_iface_attr(type, name, param)				\
	iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param)	\
static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);


	return err;
}

static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
				  u64 ep_handle)
{
	struct iscsi_cls_conn *conn;
	struct iscsi_endpoint *ep;

	if (!transport->ep_disconnect)
		return -EINVAL;

	ep = iscsi_lookup_endpoint(ep_handle);
	if (!ep)
		return -EINVAL;
	conn = ep->conn;
	if (conn) {
		mutex_lock(&conn->ep_mutex);
		conn->ep = NULL;
		mutex_unlock(&conn->ep_mutex);
	}


/*
 * Returns the matching connection to a given sid / cid tuple
 */
static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
{
	unsigned long flags;
	struct iscsi_cls_conn *conn;

	spin_lock_irqsave(&connlock, flags);
	list_for_each_entry(conn, &connlist, conn_list) {
		if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
			spin_unlock_irqrestore(&connlock, flags);
			return conn;
		}
	}


}
EXPORT_SYMBOL_GPL(iscsi_is_session_online);

static void iscsi_session_release(struct device *dev)
{
	struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
	struct Scsi_Host *shost;

	shost = iscsi_session_to_shost(session);
	scsi_host_put(shost);


	ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
}

static void __iscsi_destroy_session(struct work_struct *work)
{
	struct iscsi_cls_session *session =
		container_of(work, struct iscsi_cls_session, destroy_work);


 *  %NULL on failure
 */
static struct iscsi_bus_flash_session *
iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
{
	struct iscsi_bus_flash_session *fnode_sess = NULL;
	struct device *dev;

	dev = device_find_child(&shost->shost_gendev, &idx,
				flashnode_match_index);
	if (dev)
		fnode_sess = iscsi_dev_to_flash_session(dev);


}
EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);

static int iscsi_session_match(struct attribute_container *cont,
			   struct device *dev)
{
	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_session(dev);
	shost = iscsi_session_to_shost(session);
	if (!shost->transportt)
		return 0;

	priv = to_iscsi_internal(shost->transportt);
	if (priv->session_cont.ac.class != &iscsi_session_class.class)
		return 0;


show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
	return sysfs_emit(buf, "%llu\n", (unsigned long long) ep->id);
}

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)


iscsi_create_endpoint(int dd_size)
{
	struct device *dev;
	struct iscsi_endpoint *ep;
	uint64_t id;
	int err;

	for (id = 1; id < ISCSI_MAX_EPID; id++) {
		dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
					iscsi_match_epid);
		if (!dev)
			break;
		else
			put_device(dev);
	}
	if (id == ISCSI_MAX_EPID) {
		printk(KERN_ERR "Too many connections. Max supported %u\n",
		       ISCSI_MAX_EPID - 1);
		return NULL;
	}

	ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
	if (!ep)
		return NULL;

	ep->id = id;
	ep->dev.class = &iscsi_endpoint_class;
	dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
	err = device_register(&ep->dev);
        if (err)
                goto free_ep;

	err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
	if (err)
		goto unregister_dev;

	if (dd_size)
		ep->dd_data = &ep[1];
	return ep;

unregister_dev:
	device_unregister(&ep->dev);
	return NULL;

free_ep:
	kfree(ep);
	return NULL;
}

static int dbg_session;

static int dbg_conn;

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

#define ISCSI_MAX_EPID -1

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};


	return err;
}

static int iscsi_set_chap(struct iscsi_transport *transport,
			  struct iscsi_uevent *ev, uint32_t len)
{
	char *data = (char *)ev + sizeof(*ev);
	struct Scsi_Host *shost;
	int err = 0;

	if (!transport->set_chap)
		return -ENOSYS;

	shost = scsi_host_lookup(ev->u.set_path.host_no);
	if (!shost) {
		pr_err("%s could not find host no %u\n",
		       __func__, ev->u.set_path.host_no);
		return -ENODEV;
	}

	err = transport->set_chap(shost, data, len);


}

struct scsi_transport_template *
iscsi_register_transport(struct iscsi_transport *tt)
{
	struct iscsi_internal *priv;
	unsigned long flags;
	int err;

	BUG_ON(!tt);

	priv = iscsi_if_transport_lookup(tt);
	if (priv)
		return NULL;

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return NULL;
	INIT_LIST_HEAD(&priv->list);
	priv->iscsi_transport = tt;
	priv->t.user_scan = iscsi_user_scan;
	priv->t.create_work_queue = 1;

	priv->dev.class = &iscsi_transport_class;
	dev_set_name(&priv->dev, "%s", tt->name);
	err = device_register(&priv->dev);
	if (err)
		goto free_priv;

	err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
	if (err)
		goto unregister_dev;

	/* host parameters */
	priv->t.host_attrs.ac.class = &iscsi_host_class.class;
	priv->t.host_attrs.ac.match = iscsi_host_match;
	priv->t.host_attrs.ac.grp = &iscsi_host_group;
	priv->t.host_size = sizeof(struct iscsi_cls_host);
	transport_container_register(&priv->t.host_attrs);

	/* connection parameters */
	priv->conn_cont.ac.class = &iscsi_connection_class.class;
	priv->conn_cont.ac.match = iscsi_conn_match;
	priv->conn_cont.ac.grp = &iscsi_conn_group;
	transport_container_register(&priv->conn_cont);

	/* session parameters */
	priv->session_cont.ac.class = &iscsi_session_class.class;
	priv->session_cont.ac.match = iscsi_session_match;
	priv->session_cont.ac.grp = &iscsi_session_group;
	transport_container_register(&priv->session_cont);

	spin_lock_irqsave(&iscsi_transport_lock, flags);
	list_add(&priv->list, &iscsi_transports);
	spin_unlock_irqrestore(&iscsi_transport_lock, flags);

	printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
	return &priv->t;

unregister_dev:
	device_unregister(&priv->dev);
	return NULL;
free_priv:

static int dbg_session;

static int dbg_conn;

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

static LIST_HEAD(iscsi_transports);

static DEFINE_SPINLOCK(iscsi_transport_lock);

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};


	enum scsi_scan_mode rescan;
};

static int iscsi_user_scan_session(struct device *dev, void *data)
{
	struct iscsi_scan_data *scan_data = data;
	struct iscsi_cls_session *session;
	struct Scsi_Host *shost;
	struct iscsi_cls_host *ihost;
	unsigned long flags;
	unsigned int id;

	if (!iscsi_is_session_dev(dev))
		return 0;

	session = iscsi_dev_to_session(dev);

	ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");

	shost = iscsi_session_to_shost(session);
	ihost = shost->shost_data;

	mutex_lock(&ihost->mutex);
	spin_lock_irqsave(&session->lock, flags);
	if (session->state != ISCSI_SESSION_LOGGED_IN) {
		spin_unlock_irqrestore(&session->lock, flags);
		goto user_scan_exit;
	}
	id = session->target_id;
	spin_unlock_irqrestore(&session->lock, flags);

	if (id != ISCSI_MAX_TARGET) {
		if ((scan_data->channel == SCAN_WILD_CARD ||
		     scan_data->channel == 0) &&
		    (scan_data->id == SCAN_WILD_CARD ||
		     scan_data->id == id))
			scsi_scan_target(&session->dev, 0, id,
					 scan_data->lun, scan_data->rescan);
	}

user_scan_exit:
	mutex_unlock(&ihost->mutex);


}
EXPORT_SYMBOL_GPL(iscsi_alloc_session);

int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
{
	unsigned long flags;
	int id = 0;
	int err;

	session->sid = atomic_add_return(1, &iscsi_session_nr);

	if (target_id == ISCSI_MAX_TARGET) {
		id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);

		if (id < 0) {
			iscsi_cls_session_printk(KERN_ERR, session,
					"Failure in Target ID Allocation\n");
			return id;
		}
		session->target_id = (unsigned int)id;
		session->ida_used = true;
	} else
		session->target_id = target_id;

	dev_set_name(&session->dev, "session%u", session->sid);
	err = device_add(&session->dev);
	if (err) {
		iscsi_cls_session_printk(KERN_ERR, session,
					 "could not register session's dev\n");
		goto release_ida;
	}
	err = transport_register_device(&session->dev);
	if (err) {
		iscsi_cls_session_printk(KERN_ERR, session,
					 "could not register transport's dev\n");
		goto release_dev;
	}

	spin_lock_irqsave(&sesslock, flags);
	list_add(&session->sess_list, &sesslist);
	spin_unlock_irqrestore(&sesslock, flags);

	iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
	ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
	return 0;

release_dev:
	device_del(&session->dev);
release_ida:
	if (session->ida_used)
		ida_simple_remove(&iscsi_sess_ida, session->target_id);

static int dbg_session;

static int dbg_conn;

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static atomic_t iscsi_session_nr;

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

static DEFINE_IDA(iscsi_sess_ida);

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)


static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
			NULL);
static ssize_t
show_priv_session_creator(struct device *dev, struct device_attribute *attr,
			char *buf)
{


	[ISCSI_CONN_FAILED] = "failed"
};

static ssize_t show_conn_state(struct device *dev,
			       struct device_attribute *attr, char *buf)
{
	struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);
	const char *state = "unknown";

	if (conn->state >= 0 &&
	    conn->state < ARRAY_SIZE(connection_state_names))
		state = connection_state_names[conn->state];


 * Deletes the flashnode session entry and all children flashnode connection
 * entries from sysfs
 */
void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
{
	int err;

	err = device_for_each_child(&fnode_sess->dev, NULL,
				    iscsi_iter_destroy_flashnode_conn_fn);
	if (err)
		pr_err("Could not delete all connections for %s. Error %d.\n",
		       fnode_sess->dev.kobj.name, err);


}
EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);

static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
{
	if (!iscsi_flashnode_bus_match(dev, NULL))
		return 0;


	return 0;
}

static int flashnode_match_index(struct device *dev, void *data)
{
	struct iscsi_bus_flash_session *fnode_sess = NULL;
	int ret = 0;

	if (!iscsi_flashnode_bus_match(dev, NULL))
		goto exit_match_index;

	fnode_sess = iscsi_dev_to_flash_session(dev);
	ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;


}
EXPORT_SYMBOL_GPL(iscsi_conn_error_event);

void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
			    enum iscsi_conn_state state)
{
	struct nlmsghdr *nlh;
	struct sk_buff  *skb;
	struct iscsi_uevent *ev;
	struct iscsi_internal *priv;
	int len = nlmsg_total_size(sizeof(*ev));

	priv = iscsi_if_transport_lookup(conn->transport);
	if (!priv)
		return;

	skb = alloc_skb(len, GFP_ATOMIC);
	if (!skb) {
		iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
				      "conn login (%d)\n", state);
		return;
	}

	nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
	ev = nlmsg_data(nlh);
	ev->transport_handle = iscsi_handle(conn->transport);
	ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
	ev->r.conn_login.state = state;
	ev->r.conn_login.cid = conn->cid;
	ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
	iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);

static int dbg_session;

static int dbg_conn;

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)

#define iscsi_iface_attr_show(type, name, param_type, param)		\
static ssize_t								\
show_##type##_##name(struct device *dev, struct device_attribute *attr,	\
		     char *buf)						\
{									\
	struct iscsi_iface *iface = iscsi_dev_to_iface(dev);		\
	struct iscsi_transport *t = iface->transport;			\
	return t->get_iface_param(iface, param_type, param, buf);	\
}									\


	return err;
}

static int iscsi_login_flashnode(struct iscsi_transport *transport,
				 struct iscsi_uevent *ev)
{
	struct Scsi_Host *shost;
	struct iscsi_bus_flash_session *fnode_sess;
	struct iscsi_bus_flash_conn *fnode_conn;
	struct device *dev;
	uint32_t idx;
	int err = 0;

	if (!transport->login_flashnode) {
		err = -ENOSYS;
		goto exit_login_fnode;
	}

	shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
	if (!shost) {
		pr_err("%s could not find host no %u\n",
		       __func__, ev->u.login_flashnode.host_no);
		err = -ENODEV;
		goto put_host;
	}

	idx = ev->u.login_flashnode.flashnode_idx;
	fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
	if (!fnode_sess) {
		pr_err("%s could not find flashnode %u for host no %u\n",
		       __func__, idx, ev->u.login_flashnode.host_no);
		err = -ENODEV;
		goto put_host;
	}

	dev = iscsi_find_flashnode_conn(fnode_sess);
	if (!dev) {
		err = -ENODEV;
		goto put_sess;
	}

	fnode_conn = iscsi_dev_to_flash_conn(dev);
	err = transport->login_flashnode(fnode_sess, fnode_conn);
	put_device(dev);

put_sess:
	put_device(&fnode_sess->dev);

put_host:
	scsi_host_put(shost);

static int dbg_session;

static int dbg_conn;

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static DECLARE_WORK(stop_conn_work, stop_conn_work_fn);

static atomic_t iscsi_session_nr;

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

static DEFINE_IDA(iscsi_sess_ida);

static LIST_HEAD(iscsi_transports);

static DEFINE_SPINLOCK(iscsi_transport_lock);

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};


};

static void iscsi_flashnode_sess_release(struct device *dev)
{
	struct iscsi_bus_flash_session *fnode_sess =
						iscsi_dev_to_flash_session(dev);

	kfree(fnode_sess->targetname);
	kfree(fnode_sess->targetalias);
	kfree(fnode_sess->portal_type);


}
EXPORT_SYMBOL_GPL(iscsi_register_transport);

int iscsi_unregister_transport(struct iscsi_transport *tt)
{
	struct iscsi_internal *priv;
	unsigned long flags;

	BUG_ON(!tt);

	mutex_lock(&rx_queue_mutex);

	priv = iscsi_if_transport_lookup(tt);
	BUG_ON (!priv);

	spin_lock_irqsave(&iscsi_transport_lock, flags);
	list_del(&priv->list);
	spin_unlock_irqrestore(&iscsi_transport_lock, flags);

	transport_container_unregister(&priv->conn_cont);
	transport_container_unregister(&priv->session_cont);
	transport_container_unregister(&priv->t.host_attrs);

	sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
	device_unregister(&priv->dev);
	mutex_unlock(&rx_queue_mutex);

static int dbg_session;

static int dbg_conn;

#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)		\
	do {								\
		if (dbg_session)					\
			iscsi_cls_session_printk(KERN_INFO, _session,	\
						 "%s: " dbg_fmt,	\
						 __func__, ##arg);	\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_session,		\
				&(_session)->dev,			\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)			\
	do {								\
		if (dbg_conn)						\
			iscsi_cls_conn_printk(KERN_INFO, _conn,		\
					      "%s: " dbg_fmt,		\
					      __func__, ##arg);		\
		iscsi_dbg_trace(trace_iscsi_dbg_trans_conn,		\
				&(_conn)->dev,				\
				"%s " dbg_fmt, __func__, ##arg);	\
	} while (0);

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

static DEFINE_SPINLOCK(iscsi_transport_lock);

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)


	NULL,
};

static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
					    struct attribute *attr, int i)
{
	struct device *cdev = container_of(kobj, struct device, kobj);
	struct iscsi_cls_session *session = transport_class_to_session(cdev);
	struct iscsi_transport *t = session->transport;
	int param;

	if (attr == &dev_attr_sess_initial_r2t.attr)
		param = ISCSI_PARAM_INITIAL_R2T_EN;
	else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
		param = ISCSI_PARAM_MAX_R2T;
	else if (attr == &dev_attr_sess_immediate_data.attr)
		param = ISCSI_PARAM_IMM_DATA_EN;
	else if (attr == &dev_attr_sess_first_burst_len.attr)
		param = ISCSI_PARAM_FIRST_BURST;
	else if (attr == &dev_attr_sess_max_burst_len.attr)
		param = ISCSI_PARAM_MAX_BURST;
	else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
		param = ISCSI_PARAM_PDU_INORDER_EN;
	else if (attr == &dev_attr_sess_data_seq_in_order.attr)
		param = ISCSI_PARAM_DATASEQ_INORDER_EN;
	else if (attr == &dev_attr_sess_erl.attr)
		param = ISCSI_PARAM_ERL;
	else if (attr == &dev_attr_sess_targetname.attr)
		param = ISCSI_PARAM_TARGET_NAME;
	else if (attr == &dev_attr_sess_tpgt.attr)
		param = ISCSI_PARAM_TPGT;
	else if (attr == &dev_attr_sess_chap_in_idx.attr)
		param = ISCSI_PARAM_CHAP_IN_IDX;
	else if (attr == &dev_attr_sess_chap_out_idx.attr)
		param = ISCSI_PARAM_CHAP_OUT_IDX;
	else if (attr == &dev_attr_sess_password.attr)
		param = ISCSI_PARAM_USERNAME;
	else if (attr == &dev_attr_sess_password_in.attr)
		param = ISCSI_PARAM_USERNAME_IN;
	else if (attr == &dev_attr_sess_username.attr)
		param = ISCSI_PARAM_PASSWORD;
	else if (attr == &dev_attr_sess_username_in.attr)
		param = ISCSI_PARAM_PASSWORD_IN;
	else if (attr == &dev_attr_sess_fast_abort.attr)
		param = ISCSI_PARAM_FAST_ABORT;
	else if (attr == &dev_attr_sess_abort_tmo.attr)
		param = ISCSI_PARAM_ABORT_TMO;
	else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
		param = ISCSI_PARAM_LU_RESET_TMO;
	else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
		param = ISCSI_PARAM_TGT_RESET_TMO;
	else if (attr == &dev_attr_sess_ifacename.attr)
		param = ISCSI_PARAM_IFACE_NAME;
	else if (attr == &dev_attr_sess_initiatorname.attr)
		param = ISCSI_PARAM_INITIATOR_NAME;
	else if (attr == &dev_attr_sess_targetalias.attr)
		param = ISCSI_PARAM_TARGET_ALIAS;
	else if (attr == &dev_attr_sess_boot_root.attr)
		param = ISCSI_PARAM_BOOT_ROOT;
	else if (attr == &dev_attr_sess_boot_nic.attr)
		param = ISCSI_PARAM_BOOT_NIC;
	else if (attr == &dev_attr_sess_boot_target.attr)
		param = ISCSI_PARAM_BOOT_TARGET;
	else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
		param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
	else if (attr == &dev_attr_sess_discovery_session.attr)
		param = ISCSI_PARAM_DISCOVERY_SESS;
	else if (attr == &dev_attr_sess_portal_type.attr)
		param = ISCSI_PARAM_PORTAL_TYPE;
	else if (attr == &dev_attr_sess_chap_auth.attr)
		param = ISCSI_PARAM_CHAP_AUTH_EN;
	else if (attr == &dev_attr_sess_discovery_logout.attr)
		param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
	else if (attr == &dev_attr_sess_bidi_chap.attr)
		param = ISCSI_PARAM_BIDI_CHAP_EN;
	else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
		param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
	else if (attr == &dev_attr_sess_def_time2wait.attr)
		param = ISCSI_PARAM_DEF_TIME2WAIT;
	else if (attr == &dev_attr_sess_def_time2retain.attr)
		param = ISCSI_PARAM_DEF_TIME2RETAIN;
	else if (attr == &dev_attr_sess_isid.attr)
		param = ISCSI_PARAM_ISID;
	else if (attr == &dev_attr_sess_tsid.attr)
		param = ISCSI_PARAM_TSID;
	else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
		param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
	else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
		param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
	else if (attr == &dev_attr_sess_discovery_parent_type.attr)
		param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
	else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
		return S_IRUGO | S_IWUSR;
	else if (attr == &dev_attr_priv_sess_state.attr)
		return S_IRUGO;
	else if (attr == &dev_attr_priv_sess_creator.attr)
		return S_IRUGO;
	else if (attr == &dev_attr_priv_sess_target_id.attr)
		return S_IRUGO;
	else {
		WARN_ONCE(1, "Invalid session attr");
		return 0;
	}

static int dbg_session;

static int dbg_conn;

struct iscsi_internal {
	struct scsi_transport_template t;
	struct iscsi_transport *iscsi_transport;
	struct list_head list;
	struct device dev;

	struct transport_container conn_cont;
	struct transport_container session_cont;
}

static void stop_conn_work_fn(struct work_struct *work);

static DECLARE_WORK(stop_conn_work, stop_conn_work_fn);

static atomic_t iscsi_session_nr;

static struct workqueue_struct *iscsi_eh_timer_workq;

static struct workqueue_struct *iscsi_destroy_workq;

static DEFINE_IDA(iscsi_sess_ida);

static LIST_HEAD(iscsi_transports);

static DEFINE_SPINLOCK(iscsi_transport_lock);

#define to_iscsi_internal(tmpl) \
	container_of(tmpl, struct iscsi_internal, t)

#define dev_to_iscsi_internal(_dev) \
	container_of(_dev, struct iscsi_internal, dev)

static struct class iscsi_transport_class = {
	.name = "iscsi_transport",
	.dev_release = iscsi_transport_release,
};

static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

#define show_transport_attr(name, format)				\
static ssize_t								\
show_transport_##name(struct device *dev, 				\
		      struct device_attribute *attr,char *buf)		\
{									\
	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
}									\
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

static struct attribute *iscsi_transport_attrs[] = {
	&dev_attr_handle.attr,
	&dev_attr_caps.attr,
	NULL,
};

static struct attribute_group iscsi_transport_group = {
	.attrs = iscsi_transport_attrs,
};

#define iscsi_dev_to_endpoint(_dev) \
	container_of(_dev, struct iscsi_endpoint, dev)

#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
struct device_attribute dev_attr_##_prefix##_##_name =	\
        __ATTR(_name,_mode,_show,_store)

static struct class iscsi_endpoint_class = {
	.name = "iscsi_endpoint",
	.dev_release = iscsi_endpoint_release,
};

static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

static struct attribute *iscsi_endpoint_attrs[] = {
	&dev_attr_ep_handle.attr,
	NULL,
};

static struct attribute_group iscsi_endpoint_group = {
	.attrs = iscsi_endpoint_attrs,
};

static struct class iscsi_iface_class = {
	.name = "iscsi_iface",
	.dev_release = iscsi_iface_release,
};

#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute dev_attr_##_prefix##_##_name =		\
	__ATTR(_name, _mode, _show, _store)

#define iscsi_iface_attr_show(type, name, param_type, param)		\
static ssize_t								\
show_##type##_##name(struct device *dev, struct device_attribute *attr,	\
		     char *buf)						\
{									\
	struct iscsi_iface *iface = iscsi_dev_to_iface(dev);		\
	struct iscsi_transport *t = iface->transport;			\
	return t->get_iface_param(iface, param_type, param, buf);	\
}									\

#define iscsi_iface_net_attr(type, name, param)				\
	iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param)	\
static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);


}
EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);

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);

	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);

	ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");


 *  %NULL on failure
 */
struct device *
iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
			  int (*fn)(struct device *dev, void *data))