Add functions to control how IMMEDIATE_DATA and INITIAL_R2T is negotiated

include/iscsi-private.h

@@ -52,16 +52,6 @@ struct iscsi_in_pdu {
 void iscsi_free_iscsi_in_pdu(struct iscsi_context *iscsi, struct iscsi_in_pdu *in);
 void iscsi_free_iscsi_inqueue(struct iscsi_context *iscsi, struct iscsi_in_pdu *inqueue);
 
-enum iscsi_initial_r2t {
-	ISCSI_INITIAL_R2T_NO  = 0,
-	ISCSI_INITIAL_R2T_YES = 1
-};
-
-enum iscsi_immediate_data {
-	ISCSI_IMMEDIATE_DATA_NO  = 0,
-	ISCSI_IMMEDIATE_DATA_YES = 1
-};
-
 struct iscsi_context {
 	char initiator_name[MAX_STRING_SIZE+1];
 	char target_name[MAX_STRING_SIZE+1];

include/iscsi.h

@@ -84,6 +84,34 @@ struct iscsi_url {
        struct iscsi_context *iscsi;
 };
 
+/*
+ * This function is used to set the desired mode for immediate data.
+ * This can be set on a context before it has been logged in to the target
+ * and controls how the initiator will try to negotiate the immediate data.
+ *
+ * Default is for libiscsi to try to negotiate ISCSI_IMMEDIATE_DATA_YES
+ */
+enum iscsi_immediate_data {
+	ISCSI_IMMEDIATE_DATA_NO  = 0,
+	ISCSI_IMMEDIATE_DATA_YES = 1
+};
+int iscsi_set_immediate_data(struct iscsi_context *iscsi, enum iscsi_immediate_data immediate_data);
+
+/*
+ * This function is used to set the desired mode for initial_r2t
+ * This can be set on a context before it has been logged in to the target
+ * and controls how the initiator will try to negotiate the initial r2t.
+ *
+ * Default is for libiscsi to try to negotiate ISCSI_INITIAL_R2T_YES
+ */
+enum iscsi_initial_r2t {
+	ISCSI_INITIAL_R2T_NO  = 0,
+	ISCSI_INITIAL_R2T_YES = 1
+};
+int
+iscsi_set_initial_r2t(struct iscsi_context *iscsi, enum iscsi_initial_r2t initial_r2t);
+
+
 /*
  * This function is used to parse an iSCSI URL into a iscsi_url structure.
  * iSCSI URL format :

lib/init.c

@@ -502,3 +502,28 @@ iscsi_set_initiator_username_pwd(struct iscsi_context *iscsi,
 	strncpy(iscsi->passwd,passwd,MAX_STRING_SIZE);
 	return 0;
 }
+
+int
+iscsi_set_immediate_data(struct iscsi_context *iscsi, enum iscsi_immediate_data immediate_data)
+{
+	if (iscsi->is_loggedin != 0) {
+		iscsi_set_error(iscsi, "Already logged in when trying to set immediate_data");
+		return -1;
+	}
+
+	iscsi->want_immediate_data = immediate_data;
+	return 0;
+}
+
+int
+iscsi_set_initial_r2t(struct iscsi_context *iscsi, enum iscsi_initial_r2t initial_r2t)
+{
+	if (iscsi->is_loggedin != 0) {
+		iscsi_set_error(iscsi, "Already logged in when trying to set initial_r2t");
+		return -1;
+	}
+
+	iscsi->want_initial_r2t = initial_r2t;
+	return 0;
+}
+

lib/libiscsi.def

@@ -65,6 +65,8 @@ iscsi_scsi_command_sync
 iscsi_scsi_cancel_task
 iscsi_service
 iscsi_set_alias
+iscsi_set_immediate_data
+iscsi_set_initial_r2t
 iscsi_set_log_level
 iscsi_set_log_fn
 iscsi_set_header_digest

lib/libiscsi.syms

@@ -63,6 +63,8 @@ iscsi_scsi_command_sync
 iscsi_scsi_cancel_task
 iscsi_service
 iscsi_set_alias
+iscsi_set_immediate_data
+iscsi_set_initial_r2t
 iscsi_set_log_level
 iscsi_set_log_fn
 iscsi_set_header_digest