[CRIU] [PATCH 1/2] cgroups: Add ability to reuse existing cgroup yard directory

[Pavel Emelyanov]

> @@ -1128,27 +1124,8 @@ static int prepare_cgroup_sfd(CgroupEntry *ce)
>  
>  	pr_info("Preparing cgroups yard\n");
>  
> -	off = sprintf(paux, ".criu.cgyard.XXXXXX");
> -	if (mkdtemp(paux) == NULL) {
> -		pr_perror("Can't make temp cgyard dir");
> -		return -1;
> -	}
> -
> -	cg_yard = xstrdup(paux);
> -	if (!cg_yard) {
> -		rmdir(paux);
> -		return -1;
> -	}
> -
> -	if (mount("none", cg_yard, "tmpfs", 0, NULL)) {
> -		pr_perror("Can't mount tmpfs in cgyard");
> -		goto err;
> -	}
> -
> -	if (mount("none", cg_yard, NULL, MS_PRIVATE, NULL)) {
> -		pr_perror("Can't make cgyard private");
> -		goto err;
> -	}
> +	cg_yard = opts.cg_yard;
> +	off = strlen(opts.cg_yard);
>  
>  	pr_debug("Opening %s as cg yard\n", cg_yard);
>  	i = open(cg_yard, O_DIRECTORY);

Below there goes the code that mounts individual controllers into
the cgyard path. Do we still need one?

-- Pavel