[SCSI] iscsi: fix command requeues during iscsi recovery

Do not flush queues then block session. This will cause commands
to needlessly swing around on us and remove goofy
recovery_failed field and replace with state value.

And do not start recovery from within the host reset function.
This causeis too many problems becuase open-iscsi was desinged to
call out to userspace then have userpscae decide if we should
go into recovery or kill the session.

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

include/scsi/libiscsi.h

@@ -210,7 +210,6 @@ struct iscsi_session {
 						 * - mgmtpool,		   *
 						 * - r2tpool		   */
 	int			state;		/* session state           */
-	int			recovery_failed;
 	struct list_head	item;
 	int			conn_cnt;
 	int			age;		/* counts session re-opens */
@@ -241,8 +240,6 @@ iscsi_session_setup(struct iscsi_transport *, struct scsi_transport_template *,
 		    int, int, uint32_t, uint32_t *);
 extern void iscsi_session_teardown(struct iscsi_cls_session *);
 extern struct iscsi_session *class_to_transport_session(struct iscsi_cls_session *);
-extern void iscsi_start_session_recovery(struct iscsi_session *,
-					struct iscsi_conn *, int);
 extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *);
 
 #define session_to_cls(_sess) \

include/scsi/scsi_transport_iscsi.h

@@ -173,6 +173,8 @@ struct iscsi_cls_conn {
 #define ISCSI_STATE_LOGGED_IN		2
 #define ISCSI_STATE_FAILED		3
 #define ISCSI_STATE_TERMINATE		4
+#define ISCSI_STATE_IN_RECOVERY		5
+#define ISCSI_STATE_RECOVERY_FAILED	6
 
 struct iscsi_cls_session {
 	struct list_head sess_list;		/* item in session_list */