[SCSI] iscsi class: add session scanning

This just adds iscsi session scanning which works like fc rport scanning.
The future patches will hook the drivers into Mathew Wilcox's async
scanning infrastructure, so userspace does not have to special case
iscsi and so userspace does not have to make a extra special case for
hardware iscsi root scanning.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index 0e869d9a385..1f0ec46b4f8 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -177,11 +177,12 @@ struct iscsi_cls_session {
         struct list_head host_list;
         struct iscsi_transport *transport;
         spinlock_t lock;
+        struct work_struct scan_work;
+        struct work_struct unbind_work;
 
         /* recovery fields */
         int recovery_tmo;
         struct delayed_work recovery_work;
-        struct work_struct unbind_work;
 
         int target_id;
 
@@ -203,8 +204,8 @@ struct iscsi_cls_session {
 struct iscsi_host {
         struct list_head sessions;
         struct mutex mutex;
-        struct workqueue_struct *unbind_workq;
-        char unbind_workq_name[KOBJ_NAME_LEN];
+        struct workqueue_struct *scan_workq;
+        char scan_workq_name[KOBJ_NAME_LEN];
 };
 
 /*