[SCSI] scsi_transport_iscsi: Add conn login, kernel to user, event to support offload session login.
Offload drivers like qla4xxx will offload the sending of the login/logout
pdus still, so this patch adds iscsi_conn_login_event which is
used by these types of drivers to notify userspace that the connection
has changed state.
It also adds a iscsi_is_session_online helper so the lld
can query the sessions state field.
Signed-off-by: Manish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index cde679f..b85f8a4 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -693,6 +693,19 @@
}
EXPORT_SYMBOL_GPL(iscsi_session_chkready);
+int iscsi_is_session_online(struct iscsi_cls_session *session)
+{
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&session->lock, flags);
+ if (session->state == ISCSI_SESSION_LOGGED_IN)
+ ret = 1;
+ spin_unlock_irqrestore(&session->lock, flags);
+ return ret;
+}
+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);
@@ -1433,6 +1446,40 @@
}
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_SPACE(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);
+
+ iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
+ state);
+}
+EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
+
static int
iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi,
void *payload, int size)