void rpc_set_error(struct rpc_context *rpc, char *error_string, ...);
void nfs_set_error(struct nfs_context *nfs, char *error_string, ...);
-struct rpc_context *nfs_get_rpc_context(struct nfs_context *nfs);
const char *nfs_get_server(struct nfs_context *nfs);
const char *nfs_get_export(struct nfs_context *nfs);