[Devel] Re: [PATCH 1/1] cls_cgroup: unify classid syntax to tc
Thomas Graf
tgraf at infradead.org
Thu Jun 11 02:31:49 PDT 2009
Very nice, this is a big improvement.
On Thu, Jun 11, 2009 at 06:05:55PM +0900, Minoru Usui wrote:
> +static int get_tc_classid(u32 *classid, const char *str)
Maybe make this return u32?
> {
> - return cgrp_cls_state(cgrp)->classid;
> + u32 maj, min;
> + char *p;
> +
> + /* check "0" for reset request */
> + if (!strcmp(str, "0")) {
> + *classid = 0;
> + return 0;
> + }
> +
> + /* parse major number */
> + maj = simple_strtoul(str, &p, 16);
> + if (p == str) {
> + maj = 0;
> + if (*p != ':')
> + return -EINVAL;
> + }
> +
> + /* parse minor number */
> + if (*p == ':') {
> + if (maj >= (1<<16))
> + return -EINVAL;
> +
> + str = p + 1;
> + min = simple_strtoul(str, &p, 16);
> + if (*p != 0)
> + return -EINVAL;
> + if (min >= (1<<16))
> + return -EINVAL;
> + } else if (*p != 0)
> + return -EINVAL;
What do you think about keeping things backwards compatible by
accepting both the X:Y and XY format?
} else if (*p != 0)
return strtoul(str, NULL, 0);
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