[CRIU] [PATCH v2 4/8] save net device confs one by one

[Pavel Emelyanov]

On 09/25/2014 12:00 PM, Pavel Tikhomirov wrote:

> +static int ipv4_conf_op(char *dir, int *conf, int op)
> +{
> +	int ret;
> +	int i;
> +
> +	for (i = 0; devconfs[i]; i++) {
> +		char path[PATH_MAX];
> +		struct sysctl_req req[2];
> +
> +		snprintf(path, sizeof(path), "%s/%s", dir, devconfs[i]);
> +
> +		req[0].name = path;
> +		req[0].arg = &conf[i];
> +		req[0].type = CTL_32;
> +		req[1].name = NULL;
> +
> +		ret = sysctl_op(req, op);

Sysctl-s can be read/written in batches. Look at ipc_sysctl_req().

> +		if (ret < 0) {
> +			pr_err("Failed to read %s/%s\n", dir, devconfs[i]);
> +			return -1;
> +		}
> +	}
> +
> +	return 0;
> +}
> +