[LTP] [PATCH v10 2/2] tst_cgroup.c: Add a cgroup base controller

[Petr Vorel]

Hi Wei,

>  lib/tst_cgroup.c | 47 ++++++++++++++++++++++++++++++++---------------
...
> @@ -798,6 +804,10 @@ void tst_cg_require(const char *const ctrl_name,
>  	const char *const cgsc = "cgroup.subtree_control";
>  	struct cgroup_ctrl *const ctrl = cgroup_find_ctrl(ctrl_name);
>  	struct cgroup_root *root;
> +	int base = !strcmp(ctrl->ctrl_name, "base");
> +
> +	if (base && options->needs_ver != TST_CG_V2)
> +		tst_brk(TCONF, "Base control only support needs_ver TST_CG_V2!");

>  	if (!ctrl) {
>  		tst_brk(TBROK, "'%s' controller is unknown to LTP", ctrl_name);
> @@ -827,6 +837,9 @@ void tst_cg_require(const char *const ctrl_name,
>  	if (options->needs_ver != TST_CG_V2)
>  		cgroup_mount_v1(ctrl);

> +	if (base)
> +		ctrl->ctrl_root = roots;
> +
>  	if (!ctrl->ctrl_root) {
>  		tst_brk(TCONF,
>  			"'%s' controller required, but not available",
> @@ -849,13 +862,13 @@ mkdirs:
>  			ctrl->ctrl_name);
>  	}

> -	if (cgroup_ctrl_on_v2(ctrl)) {
> +	if (cgroup_ctrl_on_v2(ctrl) && !base) {
>  		if (root->we_mounted_it) {
>  			SAFE_FILE_PRINTFAT(root->mnt_dir.dir_fd,
> -					   cgsc, "+%s", ctrl->ctrl_name);
> +					cgsc, "+%s", ctrl->ctrl_name);
This is just unneeded whitespace change, it should be reverted.
I guess you changed it just by accident, right?
>  		} else {
>  			tst_file_printfat(root->mnt_dir.dir_fd,
> -					  cgsc, "+%s", ctrl->ctrl_name);
> +					cgsc, "+%s", ctrl->ctrl_name);
Here as well.

Kind regards,
Petr
>  		}
>  	}
...