iscsi-target: add int (*iscsit_validate_params)()

Add int (*iscsit_validate_params)() to
struct iscsit_transport, iscsi-target
uses this callback for validating
conn operational parameters.

cxgbit.ko needs this callback to check
and update the value of
MAXXMITDATASEGMENTLENGTH.

Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

2 files changed, 11 insertions, 0 deletions

diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c
index 8436d56c5f0c..83574eea0be7 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -1387,6 +1387,16 @@ static int __iscsi_target_login_thread(struct iscsi_np *np)
                         goto old_sess_out;
         }
 
+        if (conn->conn_transport->iscsit_validate_params) {
+                ret = conn->conn_transport->iscsit_validate_params(conn);
+                if (ret < 0) {
+                        if (zero_tsih)
+                                goto new_sess_out;
+                        else
+                                goto old_sess_out;
+                }
+        }
+
         ret = iscsi_target_start_negotiation(login, conn);
         if (ret < 0)
                 goto new_sess_out;
diff --git a/include/target/iscsi/iscsi_transport.h b/include/target/iscsi/iscsi_transport.h
index ccc68a0334c2..46aa219be1ae 100644
--- a/include/target/iscsi/iscsi_transport.h
+++ b/include/target/iscsi/iscsi_transport.h
@@ -26,6 +26,7 @@ struct iscsit_transport {
                                struct iscsi_datain_req *, const void *, u32);
         void (*iscsit_release_cmd)(struct iscsi_conn *, struct iscsi_cmd *);
         void (*iscsit_get_rx_pdu)(struct iscsi_conn *);
+        int (*iscsit_validate_params)(struct iscsi_conn *);
         enum target_prot_op (*iscsit_get_sup_prot_ops)(struct iscsi_conn *);
 };