[SCSI] iscsi: increment expstatsn during login

debugged by Ming and Rohan:

The problem Ming and Rohan debugged was that during a normal session
login, open-iscsi is not incrementing the exp_statsn counter. It was
stuck at zero. From the RFC, it looks like if the login response PDU has
a successful status then we should be incrementing that value. Also from
the RFC, it looks like if when we drop a connection then reconnect, we
should be using the exp_statsn from the old connection in the next
relogin attempt.

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

1 files changed, 2 insertions, 0 deletions

diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index feff74e544b7..253797c60095 100644
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -188,6 +188,7 @@ enum iscsi_param {
         ISCSI_PARAM_ERL,
         ISCSI_PARAM_IFMARKER_EN,
         ISCSI_PARAM_OFMARKER_EN,
+        ISCSI_PARAM_EXP_STATSN,
         ISCSI_PARAM_TARGET_NAME,
         ISCSI_PARAM_TPGT,
         ISCSI_PARAM_PERSISTENT_ADDRESS,
@@ -216,6 +217,7 @@ enum iscsi_param {
 #define ISCSI_ERL                       (1 << ISCSI_PARAM_ERL)
 #define ISCSI_IFMARKER_EN               (1 << ISCSI_PARAM_IFMARKER_EN)
 #define ISCSI_OFMARKER_EN               (1 << ISCSI_PARAM_OFMARKER_EN)
+#define ISCSI_EXP_STATSN                (1 << ISCSI_PARAM_EXP_STATSN)
 #define ISCSI_TARGET_NAME               (1 << ISCSI_PARAM_TARGET_NAME)
 #define ISCSI_TPGT                      (1 << ISCSI_PARAM_TPGT)
 #define ISCSI_PERSISTENT_ADDRESS        (1 << ISCSI_PARAM_PERSISTENT_ADDRESS)