cifs: Save TTL value when parsing DFS referrals

This will be needed by DFS cache.
Signed-off-by: Paulo Alcantara <palcantara@suse.de>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/cifsglob.h

@@ -1508,6 +1508,7 @@ struct dfs_info3_param {
 	int ref_flag;
 	char *path_name;
 	char *node_name;
+	int ttl;
 };
 
 /*

fs/cifs/misc.c

@@ -740,6 +740,8 @@ parse_dfs_referrals(struct get_dfs_referral_rsp *rsp, u32 rsp_size,
 			goto parse_DFS_referrals_exit;
 		}
 
+		node->ttl = le32_to_cpu(ref->TimeToLive);
+
 		ref++;
 	}