[SCSI] iscsi class, libiscsi: add iscsi sysfs session state file

This adds a iscsi session state file which exports the session
state for both software and hardware iscsi. It also hooks libiscsi
in.

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

1 files changed, 19 insertions, 0 deletions

diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index 71eda24114e9..278011fb3c2f 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -135,6 +135,14 @@ static inline void* iscsi_next_hdr(struct iscsi_cmd_task *ctask)
         return (void*)ctask->hdr + ctask->hdr_len;
 }
 
+/* Connection's states */
+enum {
+        ISCSI_CONN_INITIAL_STAGE,
+        ISCSI_CONN_STARTED,
+        ISCSI_CONN_STOPPED,
+        ISCSI_CONN_CLEANUP_WAIT,
+};
+
 struct iscsi_conn {
         struct iscsi_cls_conn   *cls_conn;      /* ptr to class connection */
         void                    *dd_data;       /* iscsi_transport data */
@@ -227,6 +235,17 @@ struct iscsi_pool {
         int                     max;            /* Max number of elements */
 };
 
+/* Session's states */
+enum {
+        ISCSI_STATE_FREE = 1,
+        ISCSI_STATE_LOGGED_IN,
+        ISCSI_STATE_FAILED,
+        ISCSI_STATE_TERMINATE,
+        ISCSI_STATE_IN_RECOVERY,
+        ISCSI_STATE_RECOVERY_FAILED,
+        ISCSI_STATE_LOGGING_OUT,
+};
+
 struct iscsi_session {
         /*
          * Syncs up the scsi eh thread with the iscsi eh thread when sending