[SCSI] libiscsi: Added support to show targetalias in sysfs

sysfs patch to view target alias:
  /sys/class/iscsi_session/session*/targetalias
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/libiscsi.c

@@ -2807,6 +2807,7 @@ void iscsi_session_teardown(struct iscsi_cls_session *cls_session)
 	kfree(session->username);
 	kfree(session->username_in);
 	kfree(session->targetname);
+	kfree(session->targetalias);
 	kfree(session->initiatorname);
 	kfree(session->ifacename);
 
@@ -3233,6 +3234,8 @@ int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
 		return iscsi_switch_str_param(&session->password_in, buf);
 	case ISCSI_PARAM_TARGET_NAME:
 		return iscsi_switch_str_param(&session->targetname, buf);
+	case ISCSI_PARAM_TARGET_ALIAS:
+		return iscsi_switch_str_param(&session->targetalias, buf);
 	case ISCSI_PARAM_TPGT:
 		sscanf(buf, "%d", &session->tpgt);
 		break;
@@ -3299,6 +3302,9 @@ int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
 	case ISCSI_PARAM_TARGET_NAME:
 		len = sprintf(buf, "%s\n", session->targetname);
 		break;
+	case ISCSI_PARAM_TARGET_ALIAS:
+		len = sprintf(buf, "%s\n", session->targetalias);
+		break;
 	case ISCSI_PARAM_TPGT:
 		len = sprintf(buf, "%d\n", session->tpgt);
 		break;

include/scsi/libiscsi.h

@@ -284,6 +284,7 @@ struct iscsi_session {
 	char			*password;
 	char			*password_in;
 	char			*targetname;
+	char			*targetalias;
 	char			*ifacename;
 	char			*initiatorname;
 	/* control data */